Updated guide. Implemented link peeking.

LICENSE

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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
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+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -3,21 +3,29 @@ Nomad Network
 
 Communicate Freely.
 
-![Screenshot](https://github.com/markqvist/NomadNet/raw/master/docs/screenshots/3.png)
+![Screenshot](https://github.com/markqvist/NomadNet/raw/master/docs/screenshots/1.png)
 
-Nomad Network is built using Reticulum, see [github.com/markqvist/Reticulum](https://github.com/markqvist/Reticulum).
+The intention with this program is to provide a tool to that allows you to build private and resilient communications platforms that are in complete control and ownership of the people that use them.
+
+Nomad Network is build on [LXMF](https://github.com/markqvist/LXMF) and [Reticulum](https://github.com/markqvist/Reticulum), which together provides the cryptographic mesh functionality and peer-to-peer message routing that Nomad Network relies on. This foundation also makes it possible to use the program over a very wide variety of communication mediums, from packet radio to fiber.
+
+Nomad Network does not need any connections to the public internet to work. In fact, it doesn't even need an IP or Ethernet network. You can use it entirely over packet radio, LoRa or even serial lines. But if you wish, you can bridge islanded Reticulum networks over the Internet or private ethernet networks, or you can build networks running completely over the Internet. The choice is yours.
 
 ## Notable Features
  - Encrypted messaging over packet-radio, LoRa, WiFi or anything else [Reticulum](https://github.com/markqvist/Reticulum) supports.
  - Zero-configuration, minimal-infrastructure mesh communication
+ - Connectable nodes that can host pages and files
+ - Built-in text-based browser for interacting with contents on nodes
+ - An easy to use and bandwidth efficient markup language for writing pages
 
 ## Current Status
+The current version of the program should be considered a beta release. The program works well, but there will most probably be bugs and possibly sub-optimal performance in some scenarios. On the other hand, this is the ideal time to have an influence on the direction of the development of Nomad Network. To do so, join the discussion, report bugs and request features here on the GitHub project.
 
-Pre-alpha. At this point Nomad Network is usable as a basic messaging client over Reticulum networks, but only the very core features have been implemented. Development is ongoing and current features being implemented are:
+### Feature roadmap
-
+ - Page caching in browser
+ - Node-side generated pages with PHP, Python, bash or others
+ - Access control and authentication for pages and files
  - Propagated messaging and discussion threads
- - Connectable nodes that can host pages, files and other resources
- - Collaborative information sharing and spatial map-style "wikis"
 
 ## Dependencies:
  - Python 3

nomadnet/Conversation.py

@@ -7,6 +7,7 @@ from nomadnet.Directory import DirectoryEntry
 
 class Conversation:
     cached_conversations = {}
+    unread_conversations = {}
     created_callback = None
 
     aspect_filter = "lxmf.delivery"
@@ -26,7 +27,7 @@ class Conversation:
 
         # Add the announce to the directory announce
         # stream logger
-        app.directory.announce_received(destination_hash, app_data)
+        app.directory.lxmf_announce_received(destination_hash, app_data)
 
     @staticmethod
     def query_for_peer(source_hash):
@@ -57,6 +58,16 @@ class Conversation:
             conversation = Conversation.cached_conversations[RNS.hexrep(source_hash, delimit=False)]
             conversation.scan_storage()
 
+        if not source_hash in Conversation.unread_conversations:
+            Conversation.unread_conversations[source_hash] = True
+            try:
+                dirname = RNS.hexrep(source_hash, delimit=False)
+                open(app.conversationpath + "/" + dirname + "/unread", 'a').close()
+            except Exception as e:
+                pass
+
+            Conversation.created_callback()
+
         return ingested_path
 
     @staticmethod
@@ -70,6 +81,13 @@ class Conversation:
                     app_data         = RNS.Identity.recall_app_data(source_hash)
                     display_name     = app.directory.display_name(source_hash)
 
+                    unread = False
+                    if source_hash in Conversation.unread_conversations:
+                        unread = True
+                    elif os.path.isfile(app.conversationpath + "/" + dirname + "/unread"):
+                        Conversation.unread_conversations[source_hash] = True
+                        unread = True
+
                     if display_name == None and app_data:
                         display_name = app_data.decode("utf-8")
 
@@ -80,7 +98,7 @@ class Conversation:
                     
                     trust_level      = app.directory.trust_level(source_hash, display_name)
                     
-                    entry = (source_hash_text, display_name, trust_level, sort_name)
+                    entry = (source_hash_text, display_name, trust_level, sort_name, unread)
                     conversations.append(entry)
 
                 except Exception as e:
@@ -114,6 +132,7 @@ class Conversation:
         self.source_known       = False
         self.source_trusted     = False
         self.source_blocked     = False
+        self.unread             = False
 
         self.__changed_callback = None
 
@@ -143,6 +162,11 @@ class Conversation:
                 message_path = self.messages_path + "/" + filename
                 self.messages.append(ConversationMessage(message_path))
 
+        new_len = len(self.messages)
+
+        if new_len > old_len:
+            self.unread = True
+
         if self.__changed_callback != None:
             self.__changed_callback(self)
 
@@ -156,6 +180,15 @@ class Conversation:
         for purged_message in purged_messages:
             self.messages.remove(purged_message)
 
+    def clear_history(self):
+        purged_messages = []
+        for conversation_message in self.messages:
+            purged_messages.append(conversation_message)
+            conversation_message.purge()
+
+        for purged_message in purged_messages:
+            self.messages.remove(purged_message)
+
     def register_changed_callback(self, callback):
         self.__changed_callback = callback
 

nomadnet/Directory.py

@@ -2,10 +2,22 @@ import os
 import RNS
 import LXMF
 import time
+import nomadnet
 import RNS.vendor.umsgpack as msgpack
 
 class Directory:
-    ANNOUNCE_STREAM_MAXLENGTH = 256
+    ANNOUNCE_STREAM_MAXLENGTH = 64
+
+    aspect_filter = "nomadnetwork.node"
+    @staticmethod
+    def received_announce(destination_hash, announced_identity, app_data):
+        app = nomadnet.NomadNetworkApp.get_shared_instance()
+        destination_hash_text = RNS.hexrep(destination_hash, delimit=False)
+
+        associated_peer = RNS.Destination.hash_from_name_and_identity("lxmf.delivery", announced_identity)
+
+        app.directory.node_announce_received(destination_hash, app_data, associated_peer)
+
 
     def __init__(self, app):
         self.directory_entries = {}
@@ -13,6 +25,7 @@ class Directory:
         self.app = app
         self.load_from_disk()
 
+
     def save_to_disk(self):
         try:
             packed_list = []
@@ -49,16 +62,41 @@ class Directory:
                     entries[e[0]] = DirectoryEntry(e[0], e[1], e[2], hosts_node)
 
                 self.directory_entries = entries
+
                 self.announce_stream = unpacked_directory["announce_stream"]
 
+
             except Exception as e:
                 RNS.log("Could not load directory from disk. The contained exception was: "+str(e), RNS.LOG_ERROR)
 
-    def announce_received(self, source_hash, app_data):
+    def lxmf_announce_received(self, source_hash, app_data):
+        if app_data != None:
             timestamp = time.time()
-        self.announce_stream.insert(0, (timestamp, source_hash, app_data))
+            self.announce_stream.insert(0, (timestamp, source_hash, app_data, False))
             while len(self.announce_stream) > Directory.ANNOUNCE_STREAM_MAXLENGTH:
                 self.announce_stream.pop()
+            self.app.ui.main_display.sub_displays.network_display.directory_change_callback()
+
+    def node_announce_received(self, source_hash, app_data, associated_peer):
+        if app_data != None:
+            timestamp = time.time()
+            self.announce_stream.insert(0, (timestamp, source_hash, app_data, True))
+            while len(self.announce_stream) > Directory.ANNOUNCE_STREAM_MAXLENGTH:
+                self.announce_stream.pop()
+
+            if self.trust_level(associated_peer) == DirectoryEntry.TRUSTED:
+                node_entry = DirectoryEntry(source_hash, display_name=app_data.decode("utf-8"), trust_level=DirectoryEntry.TRUSTED, hosts_node=True)
+                self.remember(node_entry)
+                self.app.ui.main_display.sub_displays.network_display.directory_change_callback()
+
+    def remove_announce_with_timestamp(self, timestamp):
+        selected_announce = None
+        for announce in self.announce_stream:
+            if announce[0] == timestamp:
+                selected_announce = announce
+
+        if selected_announce != None:
+            self.announce_stream.remove(selected_announce)
 
     def display_name(self, source_hash):
         if source_hash in self.directory_entries:
@@ -94,6 +132,12 @@ class Directory:
     def remember(self, entry):
         self.directory_entries[entry.source_hash] = entry
 
+        identity = RNS.Identity.recall(entry.source_hash)
+        associated_node = RNS.Destination.hash_from_name_and_identity("nomadnetwork.node", identity)
+        if associated_node in self.directory_entries:
+            node_entry = self.directory_entries[associated_node]
+            node_entry.trust_level = entry.trust_level
+
     def forget(self, source_hash):
         if source_hash in self.directory_entries:
             self.directory_entries.pop(source_hash)

nomadnet/Node.py

@@ -0,0 +1,145 @@
+import os
+import RNS
+import time
+import threading
+import RNS.vendor.umsgpack as msgpack
+
+class Node:
+    JOB_INTERVAL = 5
+
+    def __init__(self, app):
+        RNS.log("Nomad Network Node starting...", RNS.LOG_VERBOSE)
+        self.app = app
+        self.identity = self.app.identity
+        self.destination = RNS.Destination(self.identity, RNS.Destination.IN, RNS.Destination.SINGLE, "nomadnetwork", "node")
+        self.last_announce = None
+        self.announce_interval = self.app.node_announce_interval
+        self.job_interval = Node.JOB_INTERVAL
+        self.should_run_jobs = True
+        self.app_data = None
+        self.name = self.app.node_name
+
+        self.register_pages()
+        self.register_files()
+
+        if self.name == None:
+            self.name = self.app.peer_settings["display_name"]+"'s Node"
+
+        RNS.log("Node \""+self.name+"\" ready for incoming connections on "+RNS.prettyhexrep(self.destination.hash), RNS.LOG_VERBOSE)
+
+        if self.app.node_announce_at_start:
+            self.announce()
+
+
+    def register_pages(self):
+        self.servedpages = []
+        self.scan_pages(self.app.pagespath)
+
+        if not self.app.pagespath+"index.mu" in self.servedpages:
+            self.destination.register_request_handler(
+                "/page/index.mu",
+                response_generator = self.serve_default_index,
+                allow = RNS.Destination.ALLOW_ALL
+            )
+
+        for page in self.servedpages:
+            request_path = "/page"+page.replace(self.app.pagespath, "")
+            self.destination.register_request_handler(
+                request_path,
+                response_generator = self.serve_page,
+                allow = RNS.Destination.ALLOW_ALL
+            )
+
+    def register_files(self):
+        self.servedfiles = []
+        self.scan_files(self.app.filespath)
+
+        for file in self.servedfiles:
+            request_path = "/file"+file.replace(self.app.filespath, "")
+            self.destination.register_request_handler(
+                request_path,
+                response_generator = self.serve_file,
+                allow = RNS.Destination.ALLOW_ALL
+            )
+
+    def scan_pages(self, base_path):
+        files = [file for file in os.listdir(base_path) if os.path.isfile(os.path.join(base_path, file)) and file[:1] != "."]
+        directories = [file for file in os.listdir(base_path) if os.path.isdir(os.path.join(base_path, file)) and file[:1] != "."]
+
+        for file in files:
+            self.servedpages.append(base_path+"/"+file)
+
+        for directory in directories:
+            self.scan_pages(base_path+"/"+directory)
+
+    def scan_files(self, base_path):
+        files = [file for file in os.listdir(base_path) if os.path.isfile(os.path.join(base_path, file)) and file[:1] != "."]
+        directories = [file for file in os.listdir(base_path) if os.path.isdir(os.path.join(base_path, file)) and file[:1] != "."]
+
+        for file in files:
+            self.servedfiles.append(base_path+"/"+file)
+
+        for directory in directories:
+            self.scan_files(base_path+"/"+directory)
+
+    def serve_page(self, path, data, request_id, remote_identity, requested_at):
+        RNS.log("Page request "+RNS.prettyhexrep(request_id)+" for: "+str(path), RNS.LOG_VERBOSE)
+        file_path = path.replace("/page", self.app.pagespath, 1)
+        try:
+            RNS.log("Serving page: "+file_path, RNS.LOG_VERBOSE)
+            fh = open(file_path, "rb")
+            response_data = fh.read()
+            fh.close()
+            return response_data
+
+        except Exception as e:
+            RNS.log("Error occurred while handling request "+RNS.prettyhexrep(request_id)+" for: "+str(path), RNS.LOG_ERROR)
+            RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
+            return None
+
+    # TODO: Improve file handling, this will be slow for large files
+    def serve_file(self, path, data, request_id, remote_identity, requested_at):
+        RNS.log("File request "+RNS.prettyhexrep(request_id)+" for: "+str(path), RNS.LOG_VERBOSE)
+        file_path = path.replace("/file", self.app.filespath, 1)
+        file_name = path.replace("/file/", "", 1)
+        try:
+            RNS.log("Serving file: "+file_path, RNS.LOG_VERBOSE)
+            fh = open(file_path, "rb")
+            file_data = fh.read()
+            fh.close()
+            return [file_name, file_data]
+
+        except Exception as e:
+            RNS.log("Error occurred while handling request "+RNS.prettyhexrep(request_id)+" for: "+str(path), RNS.LOG_ERROR)
+            RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
+            return None
+
+    def serve_default_index(self, path, data, request_id, remote_identity, requested_at):
+        RNS.log("Serving default index for request "+RNS.prettyhexrep(request_id)+" for: "+str(path), RNS.LOG_VERBOSE)
+        return DEFAULT_INDEX.encode("utf-8")
+
+    def announce(self):
+        self.app_data = self.name.encode("utf-8")
+        self.last_announce = time.time()
+        self.destination.announce(app_data=self.app_data)
+
+    def __jobs(self):
+        while self.should_run_jobs:
+            now = time.time()
+            
+            if now > self.last_announce + self.announce_interval:
+                self.announce()
+
+            time.sleep(self.job_interval)
+
+    def peer_connected(link):
+        RNS.log("Peer connected to "+str(self.destination), RNS.LOG_INFO)
+        link.set_link_closed_callback(self.peer_disconnected)
+
+
+DEFAULT_INDEX = '''>Default Home Page
+
+This node is serving pages, but the home page file (index.mu) was not found in the page storage directory. This is an auto-generated placeholder.
+
+If you are the node operator, you can define your own home page by creating a file named `*index.mu`* in the page storage directory.
+'''

nomadnet/NomadNetworkApp.py

@@ -51,6 +51,13 @@ class NomadNetworkApp:
         self.directorypath     = self.configdir+"/storage/directory"
         self.peersettingspath  = self.configdir+"/storage/peersettings"
 
+        self.pagespath         = self.configdir+"/storage/pages"
+        self.filespath         = self.configdir+"/storage/files"
+
+        self.downloads_path    = os.path.expanduser("~/Downloads")
+
+        self.firstrun          = False
+
         if not os.path.isdir(self.storagepath):
             os.makedirs(self.storagepath)
 
@@ -63,6 +70,12 @@ class NomadNetworkApp:
         if not os.path.isdir(self.conversationpath):
             os.makedirs(self.conversationpath)
 
+        if not os.path.isdir(self.pagespath):
+            os.makedirs(self.pagespath)
+
+        if not os.path.isdir(self.filespath):
+            os.makedirs(self.filespath)
+
         if os.path.isfile(self.configpath):
             try:
                 self.config = ConfigObj(self.configpath)
@@ -80,7 +93,7 @@ class NomadNetworkApp:
         else:
             RNS.log("Could not load config file, creating default configuration file...")
             self.createDefaultConfig()
-
+            self.firstrun = True
 
         if os.path.isfile(self.identitypath):
             try:
@@ -118,7 +131,7 @@ class NomadNetworkApp:
             try:
                 RNS.log("No peer settings file found, creating new...")
                 self.peer_settings = {
-                    "display_name": "",
+                    "display_name": "Anonymous Peer",
                     "announce_interval": None,
                     "last_announce": None,
                 }
@@ -145,11 +158,17 @@ class NomadNetworkApp:
             app_data=None
         )
 
-        RNS.Transport.register_announce_handler(nomadnet.Conversation)
-
         RNS.log("LXMF Router ready to receive on: "+RNS.prettyhexrep(self.lxmf_destination.hash))
 
-        self.directory = nomadnet.Directory.Directory(self)
+        self.directory = nomadnet.Directory(self)
+
+        if self.enable_node:
+            self.node = nomadnet.Node(self)
+        else:
+            self.node = None
+
+        RNS.Transport.register_announce_handler(nomadnet.Conversation)
+        RNS.Transport.register_announce_handler(nomadnet.Directory)
 
         nomadnet.ui.spawn(self.uimode)
 
@@ -190,6 +209,18 @@ class NomadNetworkApp:
     def conversations(self):
         return nomadnet.Conversation.conversation_list(self)
 
+    def conversation_is_unread(self, source_hash):
+        if bytes.fromhex(source_hash) in nomadnet.Conversation.unread_conversations:
+            return True
+        else:
+            return False
+
+    def mark_conversation_read(self, source_hash):
+        if bytes.fromhex(source_hash) in nomadnet.Conversation.unread_conversations:
+            nomadnet.Conversation.unread_conversations.pop(bytes.fromhex(source_hash))
+            if os.path.isfile(self.conversationpath + "/" + source_hash + "/unread"):
+                os.unlink(self.conversationpath + "/" + source_hash + "/unread")
+
     def createDefaultConfig(self):
         self.config = ConfigObj(__default_nomadnet_config__)
         self.config.filename = self.configpath
@@ -227,6 +258,10 @@ class NomadNetworkApp:
                     value = self.config["client"].as_bool(option)
                     self.enable_client = value
 
+                if option == "downloads_path":
+                    value = self.config["client"]["downloads_path"]
+                    self.downloads_path = os.path.expanduser(value)
+
                 if option == "user_interface":
                     value = value.lower()
                     if value == "none":
@@ -241,6 +276,22 @@ class NomadNetworkApp:
                             else:
                                 self.config["textui"]["intro_time"] = self.config["textui"].as_int("intro_time")
 
+                            if not "editor" in self.config["textui"]:
+                                self.config["textui"]["editor"] = "editor"
+
+                            if not "glyphs" in self.config["textui"]:
+                                self.config["textui"]["glyphs"] = "unicode"
+
+                            if not "mouse_enabled" in self.config["textui"]:
+                                self.config["textui"]["mouse_enabled"] = True
+                            else:
+                                self.config["textui"]["mouse_enabled"] = self.config["textui"].as_bool("mouse_enabled")
+
+                            if not "hide_guide" in self.config["textui"]:
+                                self.config["textui"]["hide_guide"] = False
+                            else:
+                                self.config["textui"]["hide_guide"] = self.config["textui"].as_bool("hide_guide")
+
                             if not "animation_interval" in self.config["textui"]:
                                 self.config["textui"]["animation_interval"] = 1
                             else:
@@ -279,12 +330,39 @@ class NomadNetworkApp:
                         self.uimode = nomadnet.ui.UI_WEB
 
         if "node" in self.config:
-            for option in self.config["node"]:
+            if not "enable_node" in self.config["node"]:
-                value = self.config["node"][option]
+                self.enable_node = False
+            else:
+                self.enable_node = self.config["node"].as_bool("enable_node")
+
+            if not "node_name" in self.config["node"]:
+                self.node_name = None
+            else:
+                value = self.config["node"]["node_name"]
+                if value.lower() == "none":
+                    self.node_name = None
+                else:
+                    self.node_name = self.config["node"]["node_name"]
+
+            if not "announce_at_start" in self.config["node"]:
+                self.node_announce_at_start = False
+            else:
+                self.node_announce_at_start = self.config["node"]["announce_at_start"]
+
+            if not "announce_interval" in self.config["node"]:
+                self.node_announce_interval = 720
+            else:
+                value = self.config["node"].as_int("announce_interval")
+                if value < 1:
+                    value = 1
+                self.node_announce_interval = value
+
+            if "pages_path" in self.config["node"]:
+                self.pagespath = self.config["node"]["pages_path"]
+
+            if "files_path" in self.config["node"]:
+                self.filespath = self.config["node"]["files_path"]
 
-                if option == "enable_node":
-                    value = self.config["node"].as_bool(option)
-                    self.enable_node = value
               
     @staticmethod
     def get_shared_instance():
@@ -319,29 +397,74 @@ destination = file
 
 [client]
 
-enable_client = Yes
+enable_client = yes
 user_interface = text
+downloads_path = ~/Downloads
 
 [textui]
 
+# Amount of time to show intro screen
 intro_time = 1
 
 # Specify the number of colors to use
 # valid colormodes are:
 # monochrome, 16, 88, 256 and 24bit
 #
-# The default is a conservative 88 colors,
+# The default is a conservative 256 colors.
-# but 256 colors can probably be used on
+# If your terminal does not support this,
-# most terminals. Some terminals
+# you can lower it. Some terminals support
+# 24 bit color.
 
 # colormode = monochrome
 # colormode = 16
-colormode = 88
+# colormode = 88
-# colormode = 256
+colormode = 256
 # colormode = 24bit
 
+# By default, unicode glyphs are used. If
+# you have a Nerd Font installed, you can
+# enable this for a better user interface.
+# You can also enable plain text glyphs if
+# your terminal doesn't support unicode.
+
+# glyphs = plain
+glyphs = unicode
+# glyphs = nerdfont
+
+# You can specify whether mouse events
+# should be considered as input to the
+# application. On by default.
+mouse_enabled = True
+
+# What editor to use for editing text. By
+# default the operating systems "editor"
+# alias will be used.
+editor = editor
+
+# If you don't want the Guide section to
+# show up in the menu, you can disable it.
+
+hide_guide = no
+
 [node]
 
-enable_node = No
+# Whether to enable node hosting
+
+enable_node = no
+
+# The node name will be visible to other
+# peers on the network, and included in
+# announces.
+
+node_name = None
+
+# Automatic announce interval in minutes.
+# 12 hours by default.
+
+announce_interval = 720
+
+# Whether to announce when the node starts
+
+announce_at_start = No
 
 '''.splitlines()

nomadnet/__init__.py

@@ -3,6 +3,8 @@ import glob
 
 from .NomadNetworkApp import NomadNetworkApp
 from .Conversation import Conversation
+from .Directory import Directory
+from .Node import Node
 from .ui import *
 
 

nomadnet/_version.py

@@ -1 +1 @@
-__version__ = "0.0.4"
+__version__ = "0.0.8"

nomadnet/ui/TextUI.py

@@ -15,31 +15,67 @@ THEME_DARK     = 0x01
 THEME_LIGHT    = 0x02
 
 THEMES = {
-    THEME_DARK: [
+    THEME_DARK: {
+        "urwid_theme": [
             # Style name                    # 16-color style                        # Monochrome style          # 88, 256 and true-color style
-        ('heading',                     'light gray,underline', 'default',      'underline',                'g93,underline', 'default'),
+            ("heading",                     "light gray,underline", "default",      "underline",                "g93,underline", "default"),
-        ('menubar',                     'black', 'light gray',                  'standout',                 '#111', '#bbb'),
+            ("menubar",                     "black", "light gray",                  "standout",                 "#111", "#bbb"),
-        ('shortcutbar',                 'black', 'light gray',                  'standout',                 '#111', '#bbb'),
+            ("scrollbar",                   "light gray", "default",                "standout",                 "#444", "default"),
-        ('body_text',                   'white', 'default',                     'default',                  '#0a0', 'default'),
+            ("shortcutbar",                 "black", "light gray",                  "standout",                 "#111", "#bbb"),
-        ('error_text',                  'dark red', 'default',                  'default',                  'dark red', 'default'),
+            ("body_text",                   "white", "default",                     "default",                  "#ddd", "default"),
-        ('warning_text',                'yellow', 'default',                    'default',                  '#ba4', 'default'),
+            ("error_text",                  "dark red", "default",                  "default",                  "dark red", "default"),
-        ('inactive_text',               'dark gray', 'default',                 'default',                  'dark gray', 'default'),
+            ("warning_text",                "yellow", "default",                    "default",                  "#ba4", "default"),
-        ('buttons',                     'light green,bold', 'default',          'default',                  '#00a533', 'default'),
+            ("inactive_text",               "dark gray", "default",                 "default",                  "dark gray", "default"),
-        ('msg_editor',                  'black', 'light cyan',                  'standout',                 '#111', '#0bb'),
+            ("buttons",                     "light green,bold", "default",          "default",                  "#00a533", "default"),
-        ("msg_header_ok",               'black', 'light green',                 'standout',                 '#111', '#6b2'),
+            ("msg_editor",                  "black", "light cyan",                  "standout",                 "#111", "#0bb"),
-        ("msg_header_caution",          'black', 'yellow',                      'standout',                 '#111', '#fd3'),
+            ("msg_header_ok",               "black", "light green",                 "standout",                 "#111", "#6b2"),
-        ("msg_header_sent",             'black', 'light gray',                  'standout',                 '#111', '#ddd'),
+            ("msg_header_caution",          "black", "yellow",                      "standout",                 "#111", "#fd3"),
-        ("msg_header_delivered",        'black', 'light blue',                  'standout',                 '#111', '#28b'),
+            ("msg_header_sent",             "black", "light gray",                  "standout",                 "#111", "#ddd"),
-        ("msg_header_failed",           'black', 'dark gray',                   'standout',                 'black', 'dark gray'),
+            ("msg_header_delivered",        "black", "light blue",                  "standout",                 "#111", "#28b"),
-        ("msg_warning_untrusted",       'black', 'dark red',                    'standout',                 '#111', 'dark red'),
+            ("msg_header_failed",           "black", "dark gray",                   "standout",                 "#000", "#777"),
-        ("list_focus",                  "black", "light gray",                  "standout",                 "#111", "#bbb"),
+            ("msg_warning_untrusted",       "black", "dark red",                    "standout",                 "#111", "dark red"),
-        ("list_off_focus",              "black", "dark gray",                   "standout",                 "#111", "dark gray"),
+            ("list_focus",                  "black", "light gray",                  "standout",                 "#111", "#aaa"),
-        ("list_trusted",                "light green", "default",               "default",                  "#6b2", "default"),
+            ("list_off_focus",              "black", "dark gray",                   "standout",                 "#111", "#777"),
-        ("list_focus_trusted",          "black", "light gray",                  "standout",                 "#180", "#bbb"),
+            ("list_trusted",                "dark green", "default",                "default",                  "#6b2", "default"),
-        ("list_unknown",                "dark gray", "default",                 "default",                  "light gray", "default"),
+            ("list_focus_trusted",          "black", "light gray",                  "standout",                 "#150", "#aaa"),
-        ("list_untrusted",              "dark red", "default",                  "default",                  "dark red", "default"),
+            ("list_unknown",                "dark gray", "default",                 "default",                  "#bbb", "default"),
-        ("list_focus_untrusted",        "black", "light gray",                  "standout",                 "#810", "#bbb"),
+            ("list_normal",                 "dark gray", "default",                 "default",                  "#bbb", "default"),
-    ]
+            ("list_untrusted",              "dark red", "default",                  "default",                  "#a22", "default"),
+            ("list_focus_untrusted",        "black", "light gray",                  "standout",                 "#810", "#aaa"),
+            ("topic_list_normal",           "white", "default",                     "default",                  "#ddd", "default"),
+            ("browser_controls",            "light gray", "default",                "default",                  "#bbb", "default"),
+            ("progress_full",               "black", "light gray",                  "standout",                 "#111", "#bbb"),
+            ("progress_empty",              "light gray", "default",                "default",                  "#ddd", "default"),
+        ],        
+    }
+}
+
+GLYPHSETS = {
+    "plain": 1,
+    "unicode": 2,
+    "nerdfont": 3
+}
+
+GLYPHS = {
+    # Glyph name        # Plain      # Unicode      # Nerd Font
+    ("check",           "=",         "\u2713",      "\u2713"),
+    ("cross",           "X",         "\u2715",      "\u2715"),
+    ("unknown",         "?",         "?",           "?"),
+    ("lock",            "E",         "\U0001f512",  "\uf023"),
+    ("unlock",          "!",         "\U0001f513",  "\uf09c"),
+    ("arrow_r",         "->",        "\u2192",      "\u2192"),
+    ("arrow_l",         "<-",        "\u2190",      "\u2190"),
+    ("arrow_u",         "/\\",       "\u2191",      "\u2191"),
+    ("arrow_d",         "\\/",       "\u2193",      "\u2193"),
+    ("warning",         "!",         "\u26a0",      "\uf12a"),
+    ("info",            "i",         "\u2139",      "\ufb4d"),
+    ("unread",          "N",         "\u2709",      "\uf003 "),
+    ("divider1",        "-",         "\u2504",      "\u2504"),
+    ("peer",            "P",         "\U0001F464",  "\uf415"),
+    ("node",            "N",         "\U0001F5A5",  "\uf502"),
+    ("page",            "",          "\U0001F5B9",  "\uf719 "),
+    ("speed",           "",          "\U0001F5B9",  "\uf9c4"),
+    ("decoration_menu", "",          "",            " \uf93a"),
 }
 
 class TextUI:
@@ -61,11 +97,25 @@ class TextUI:
         intro_timeout  = self.app.config["textui"]["intro_time"]
         colormode      = self.app.config["textui"]["colormode"]
         theme          = self.app.config["textui"]["theme"]
+        mouse_enabled  = self.app.config["textui"]["mouse_enabled"]
 
-        palette       = THEMES[theme]
+        self.palette   = THEMES[theme]["urwid_theme"]
+
+        if self.app.config["textui"]["glyphs"] == "plain":
+            glyphset = "plain"
+        elif self.app.config["textui"]["glyphs"] == "unicoode":
+            glyphset = "unicode"
+        elif self.app.config["textui"]["glyphs"] == "nerdfont":
+            glyphset = "nerdfont"
+        else:
+            glyphset = "unicode"
+
+        self.glyphs = {}
+        for glyph in GLYPHS:
+            self.glyphs[glyph[0]] = glyph[GLYPHSETS[glyphset]]
 
         self.screen = urwid.raw_display.Screen()
-        self.screen.register_palette(palette)
+        self.screen.register_palette(self.palette)
         
         self.main_display = Main.MainDisplay(self, self.app)
         
@@ -75,16 +125,22 @@ class TextUI:
         else:
             initial_widget = self.main_display.widget
 
-        self.loop = urwid.MainLoop(initial_widget, screen=self.screen)
+        self.loop = urwid.MainLoop(initial_widget, screen=self.screen, handle_mouse=mouse_enabled)
 
         if intro_timeout > 0:
             self.loop.set_alarm_in(intro_timeout, self.display_main)
 
+        # TODO: Probably remove this at some point when better terminal
+        # color capability detection has been implemented
+        if colormode > 16:
+            RNS.log("Starting Text UI in "+str(colormode)+" color mode. If no UI appears, try adjusting your color settings in "+str(self.app.configdir)+"/config", RNS.LOG_INFO, _override_destination = True)
+        
         self.set_colormode(colormode)
 
         self.loop.run()
 
     def set_colormode(self, colormode):
+        self.colormode = colormode
         self.screen.set_terminal_properties(colormode)
         self.screen.reset_default_terminal_palette()
 

nomadnet/ui/textui/Browser.py

@@ -0,0 +1,571 @@
+import RNS
+import os
+import time
+import urwid
+import nomadnet
+import threading
+from .MicronParser import markup_to_attrmaps
+from nomadnet.vendor.Scrollable import *
+
+class BrowserFrame(urwid.Frame):
+    def keypress(self, size, key):
+        if key == "ctrl w":
+            self.delegate.disconnect()
+        elif self.get_focus() == "body":
+            return super(BrowserFrame, self).keypress(size, key)
+            # if key == "up" and self.delegate.messagelist.top_is_visible:
+            #     nomadnet.NomadNetworkApp.get_shared_instance().ui.main_display.frame.set_focus("header")
+            # elif key == "down" and self.delegate.messagelist.bottom_is_visible:
+            #     self.set_focus("footer")
+            # else:
+            #     return super(ConversationFrame, self).keypress(size, key)
+        else:
+            return super(BrowserFrame, self).keypress(size, key)
+
+class Browser:
+    DEFAULT_PATH       = "/page/index.mu"
+    DEFAULT_TIMEOUT    = 10
+
+    NO_PATH            = 0x00
+    PATH_REQUESTED     = 0x01
+    ESTABLISHING_LINK  = 0x02
+    LINK_TIMEOUT       = 0x03
+    LINK_ESTABLISHED   = 0x04
+    REQUESTING         = 0x05
+    REQUEST_SENT       = 0x06
+    REQUEST_FAILED     = 0x07
+    REQUEST_TIMEOUT    = 0x08
+    RECEIVING_RESPONSE = 0x09
+    DISCONECTED        = 0xFE
+    DONE               = 0xFF
+
+    def __init__(self, app, app_name, aspects, destination_hash = None, path = None, auth_identity = None, delegate = None):
+        self.app = app
+        self.g = self.app.ui.glyphs
+        self.delegate = delegate
+        self.app_name = app_name
+        self.aspects = aspects
+        self.destination_hash = destination_hash
+        self.path = path
+        self.timeout = Browser.DEFAULT_TIMEOUT
+        self.last_keypress = None
+
+        self.link = None
+        self.status = Browser.DISCONECTED
+        self.response_progress = 0
+        self.response_size = None
+        self.response_transfer_size = None
+        self.saved_file_name = None
+        self.page_data = None
+        self.displayed_page_data = None
+        self.auth_identity = auth_identity
+        self.display_widget = None
+        self.link_status_showing = False
+        self.link_target = None
+        self.frame = None
+        self.attr_maps = []
+        self.build_display()
+
+        if self.path == None:
+            self.path = Browser.DEFAULT_PATH
+
+        if self.destination_hash != None:
+            self.load_page()
+
+    def current_url(self):
+        if self.destination_hash == None:
+            return ""
+        else:
+            if self.path == None:
+                path = ""
+            else:
+                path = self.path
+            return RNS.hexrep(self.destination_hash, delimit=False)+":"+path
+
+
+    def marked_link(self, link_target):
+        self.link_target = link_target
+        self.app.ui.loop.set_alarm_in(0.1, self.marked_link_job)
+
+    def marked_link_job(self, sender, event):
+        link_target = self.link_target
+
+        if link_target == None:
+            if self.link_status_showing:
+                self.browser_footer = self.make_status_widget()
+                self.frame.contents["footer"] = (self.browser_footer, self.frame.options())
+                self.link_status_showing = False
+        else:
+            self.link_status_showing = True
+            self.browser_footer = urwid.AttrMap(urwid.Pile([urwid.Divider(self.g["divider1"]), urwid.Text("Link to: "+str(link_target))]), "browser_controls")
+            self.frame.contents["footer"] = (self.browser_footer, self.frame.options())
+
+    def handle_link(self, link_target):
+        if self.status >= Browser.DISCONECTED:
+            RNS.log("Browser handling link to: "+str(link_target), RNS.LOG_DEBUG)
+            try:
+                self.retrieve_url(link_target)
+            except Exception as e:
+                self.browser_footer = urwid.Text("Could not open link: "+str(e))
+                self.frame.contents["footer"] = (self.browser_footer, self.frame.options())
+        else:
+            RNS.log("Browser aleady hadling link, cannot handle link to: "+str(link_target), RNS.LOG_DEBUG)
+
+
+
+    def micron_released_focus(self):
+        if self.delegate != None:
+            self.delegate.focus_lists()
+
+    def build_display(self):
+        self.browser_header = urwid.Text("")
+        self.browser_footer = urwid.Text("")
+
+        self.browser_body = urwid.Filler(urwid.Text("Disconnected\n"+self.g["arrow_l"]+"  "+self.g["arrow_r"], align="center"), "middle")
+
+        self.frame = BrowserFrame(self.browser_body, header=self.browser_header, footer=self.browser_footer)
+        self.frame.delegate = self
+        self.linebox = urwid.LineBox(self.frame, title="Remote Node")
+        self.display_widget = urwid.AttrMap(self.linebox, "inactive_text")
+
+    def make_status_widget(self):
+        if self.response_progress > 0:
+            pb = ResponseProgressBar("progress_empty" , "progress_full", current=self.response_progress, done=1.0, satt=None)
+            widget = urwid.Pile([urwid.Divider(self.g["divider1"]), pb])
+        else:
+            widget = urwid.Pile([urwid.Divider(self.g["divider1"]), urwid.Text(self.status_text())])
+
+        return urwid.AttrMap(widget, "browser_controls")
+
+    def make_control_widget(self):
+        return urwid.AttrMap(urwid.Pile([urwid.Text(self.g["node"]+" "+self.current_url()), urwid.Divider(self.g["divider1"])]), "browser_controls")
+
+    def make_request_failed_widget(self):
+        def back_action(sender):
+            self.status = Browser.DONE
+            self.destination_hash = self.previous_destination_hash
+            self.path = self.previous_path
+            self.update_display()
+
+        columns = urwid.Columns([
+            ("weight", 0.5, urwid.Text(" ")),
+            (8, urwid.Button("Back", on_press=back_action)),
+            ("weight", 0.5, urwid.Text(" "))
+        ])
+
+        if len(self.attr_maps) > 0:
+            pile = urwid.Pile([
+                    urwid.Text("!\n\n"+self.status_text()+"\n", align="center"),
+                    columns
+            ])
+        else:
+            pile = urwid.Pile([
+                    urwid.Text("!\n\n"+self.status_text(), align="center")
+            ])
+
+        return urwid.Filler(pile, "middle")
+    
+    def update_display(self):
+        if self.status == Browser.DISCONECTED:
+            self.display_widget.set_attr_map({None: "inactive_text"})
+            self.browser_body = urwid.Filler(urwid.Text("Disconnected\n"+self.g["arrow_l"]+"  "+self.g["arrow_r"], align="center"), "middle")
+            self.browser_footer = urwid.Text("")
+            self.browser_header = urwid.Text("")
+            self.linebox.set_title("Remote Node")
+        else:
+            self.display_widget.set_attr_map({None: "body_text"})
+            self.browser_header = self.make_control_widget()
+            self.linebox.set_title(self.app.directory.simplest_display_str(self.destination_hash))
+
+            if self.status == Browser.DONE:
+                self.browser_footer = self.make_status_widget()
+                self.update_page_display()
+            
+            elif self.status == Browser.LINK_TIMEOUT:
+                self.browser_body = self.make_request_failed_widget()
+                self.browser_footer = urwid.Text("")
+            
+            elif self.status <= Browser.REQUEST_SENT:
+                if len(self.attr_maps) == 0:
+                    self.browser_body = urwid.Filler(urwid.Text("Retrieving\n["+self.current_url()+"]", align="center"), "middle")
+
+                self.browser_footer = self.make_status_widget()
+            
+            elif self.status == Browser.REQUEST_FAILED:
+                self.browser_body = self.make_request_failed_widget()
+                self.browser_footer = urwid.Text("")
+            
+            elif self.status == Browser.REQUEST_TIMEOUT:
+                self.browser_body = self.make_request_failed_widget()
+                self.browser_footer = urwid.Text("")
+            
+            else:
+                pass
+
+        self.frame.contents["body"] = (self.browser_body, self.frame.options())
+        self.frame.contents["header"] = (self.browser_header, self.frame.options())
+        self.frame.contents["footer"] = (self.browser_footer, self.frame.options())
+
+    def update_page_display(self):
+        pile = urwid.Pile(self.attr_maps)
+        self.browser_body = urwid.AttrMap(ScrollBar(Scrollable(pile, force_forward_keypress=True), thumb_char="\u2503", trough_char=" "), "scrollbar")
+
+    def identify(self):
+        if self.link != None:
+            if self.link.status == RNS.Link.ACTIVE:
+                self.link.identify(self.auth_identity)
+
+
+    def disconnect(self):
+        if self.link != None:
+            self.link.teardown()
+        
+        self.attr_maps = []
+        self.status = Browser.DISCONECTED
+        self.response_progress = 0
+        self.response_size = None
+        self.response_transfer_size = None
+
+        self.update_display()
+
+
+    def retrieve_url(self, url):
+        self.previous_destination_hash = self.destination_hash
+        self.previous_path = self.path
+
+        destination_hash = None
+        path = None
+
+        components = url.split(":")
+        if len(components) == 1:
+            if len(components[0]) == 20:
+                try:
+                    destination_hash = bytes.fromhex(components[0])
+                except Exception as e:
+                    raise ValueError("Malformed URL")
+                path = Browser.DEFAULT_PATH
+            else:
+                raise ValueError("Malformed URL")
+        elif len(components) == 2:
+            if len(components[0]) == 20:
+                try:
+                    destination_hash = bytes.fromhex(components[0])
+                except Exception as e:
+                    raise ValueError("Malformed URL")
+                path = components[1]
+                if len(path) == 0:
+                    path = Browser.DEFAULT_PATH
+            else:
+                if len(components[0]) == 0:
+                    if self.destination_hash != None:
+                        destination_hash = self.destination_hash
+                        path = components[1]
+                        if len(path) == 0:
+                            path = Browser.DEFAULT_PATH
+                    else:
+                        raise ValueError("Malformed URL")
+                else:
+                        raise ValueError("Malformed URL")
+        else:
+            raise ValueError("Malformed URL")
+
+        if destination_hash != None and path != None:
+            if path.startswith("/file/"):
+                if destination_hash == self.destination_hash:
+                    self.download_file(destination_hash, path)
+                else:
+                    RNS.log("Cannot request file download from a node that is not currently connected.", RNS.LOG_ERROR)
+                    RNS.log("The requested URL was: "+str(url), RNS.LOG_ERROR)
+            else:
+                self.set_destination_hash(destination_hash)
+                self.set_path(path)
+                self.load_page()
+
+    def set_destination_hash(self, destination_hash):
+        if len(destination_hash) == RNS.Identity.TRUNCATED_HASHLENGTH//8:
+            self.destination_hash = destination_hash
+            return True
+        else:
+            return False
+
+
+    def set_path(self, path):
+        self.path = path
+
+
+    def set_timeout(self, timeout):
+        self.timeout = timeout
+
+
+    def download_file(self, destination_hash, path):
+        if self.link != None and self.link.destination.hash == self.destination_hash:
+            # Send the request
+            self.status = Browser.REQUESTING
+            self.response_progress = 0
+            self.response_size = None
+            self.response_transfer_size = None
+            self.saved_file_name = None
+
+            self.update_display()
+            receipt = self.link.request(
+                path,
+                data = None,
+                response_callback = self.file_received,
+                failed_callback = self.request_failed,
+                progress_callback = self.response_progressed
+            )
+
+            if receipt:
+                self.last_request_receipt = receipt
+                self.last_request_id = receipt.request_id
+                self.status = Browser.REQUEST_SENT
+                self.update_display()
+            else:
+                self.link.teardown()
+
+
+    def load_page(self):
+        load_thread = threading.Thread(target=self.__load)
+        load_thread.setDaemon(True)
+        load_thread.start()
+
+
+    def __load(self):
+        # If an established link exists, but it doesn't match the target
+        # destination, we close and clear it.
+        if self.link != None and self.link.destination.hash != self.destination_hash:
+            self.link.teardown()
+            self.link = None
+
+        # If no link to the destination exists, we create one.
+        if self.link == None:
+            if not RNS.Transport.has_path(self.destination_hash):
+                self.status = Browser.NO_PATH
+                self.update_display()
+
+                RNS.Transport.request_path(self.destination_hash)
+                self.status = Browser.PATH_REQUESTED
+                self.update_display()
+
+                pr_time = time.time()
+                while not RNS.Transport.has_path(self.destination_hash):
+                    now = time.time()
+                    if now > pr_time+self.timeout:
+                        self.request_timeout()
+                        return
+
+                    time.sleep(0.25)
+
+            self.status = Browser.ESTABLISHING_LINK
+            self.update_display()
+
+            identity = RNS.Identity.recall(self.destination_hash)
+            destination = RNS.Destination(
+                identity,
+                RNS.Destination.OUT,
+                RNS.Destination.SINGLE,
+                self.app_name,
+                self.aspects
+            )
+
+            self.link = RNS.Link(destination, established_callback = self.link_established, closed_callback = self.link_closed)
+
+            while self.status == Browser.ESTABLISHING_LINK:
+                time.sleep(0.1)
+
+            if self.status != Browser.LINK_ESTABLISHED:
+                return
+
+            self.update_display()
+
+        # Send the request
+        self.status = Browser.REQUESTING
+        self.response_progress = 0
+        self.response_size = None
+        self.response_transfer_size = None
+        self.saved_file_name = None
+
+
+        self.update_display()
+        receipt = self.link.request(
+            self.path,
+            data = None,
+            response_callback = self.response_received,
+            failed_callback = self.request_failed,
+            progress_callback = self.response_progressed
+        )
+
+        if receipt:
+            self.last_request_receipt = receipt
+            self.last_request_id = receipt.request_id
+            self.status = Browser.REQUEST_SENT
+            self.update_display()
+        else:
+            self.link.teardown()
+
+
+
+    def link_established(self, link):
+        self.status = Browser.LINK_ESTABLISHED
+
+
+    def link_closed(self, link):
+        if self.status == Browser.DISCONECTED or self.status == Browser.DONE:
+            self.link = None
+        elif self.status == Browser.ESTABLISHING_LINK:
+            self.link_establishment_timeout()
+        else:
+            self.link = None
+            self.status = Browser.REQUEST_FAILED
+        self.update_display()
+
+    def link_establishment_timeout(self):
+        self.status = Browser.LINK_TIMEOUT
+        self.response_progress = 0
+        self.response_size = None
+        self.response_transfer_size = None
+        self.link = None
+
+        self.update_display()
+
+
+    def response_received(self, request_receipt):
+        try:
+            self.status = Browser.DONE
+            self.page_data = request_receipt.response
+            self.markup = self.page_data.decode("utf-8")
+            self.attr_maps = markup_to_attrmaps(self.markup, url_delegate=self)
+            self.response_progress = 0
+
+            self.update_display()
+        except Exception as e:
+            RNS.log("An error occurred while handling response. The contained exception was: "+str(e))
+
+
+    def file_received(self, request_receipt):
+        try:
+            file_name = request_receipt.response[0]
+            file_data = request_receipt.response[1]
+            file_destination = self.app.downloads_path+"/"+file_name
+            
+            counter = 0
+            while os.path.isfile(file_destination):
+                counter += 1
+                file_destination = self.app.downloads_path+"/"+file_name+"."+str(counter)
+
+            fh = open(file_destination, "wb")
+            fh.write(file_data)
+            fh.close()
+
+            self.saved_file_name = file_destination.replace(self.app.downloads_path+"/", "", 1)
+            self.status = Browser.DONE
+            self.response_progress = 0
+
+            self.update_display()
+        except Exception as e:
+            RNS.log("An error occurred while handling file response. The contained exception was: "+str(e))
+
+    
+    def request_failed(self, request_receipt=None):
+        if request_receipt != None:
+            if request_receipt.request_id == self.last_request_id:
+                self.status = Browser.REQUEST_FAILED
+                self.response_progress = 0
+                self.response_size = None
+                self.response_transfer_size = None
+
+                self.update_display()
+        else:
+            self.status = Browser.REQUEST_FAILED
+            self.response_progress = 0
+            self.response_size = None
+            self.response_transfer_size = None
+
+            self.update_display()
+
+
+    def request_timeout(self, request_receipt=None):
+        self.status = Browser.REQUEST_TIMEOUT
+        self.response_progress = 0
+        self.response_size = None
+        self.response_transfer_size = None
+
+        self.update_display()
+
+
+    def response_progressed(self, request_receipt):
+        self.response_progress      = request_receipt.progress
+        self.response_time          = request_receipt.get_response_time()
+        self.response_size          = request_receipt.response_size
+        self.response_transfer_size = request_receipt.response_transfer_size
+        self.update_display()
+
+
+    def status_text(self):
+        if self.status == Browser.DONE and self.response_transfer_size != None:
+            if self.response_time != None:
+                response_time_str = "{:.2f}".format(self.response_time)
+            else:
+                response_time_str = "None"
+
+            stats_string = "  "+self.g["page"]+size_str(self.response_size)
+            stats_string += "   "+self.g["arrow_d"]+size_str(self.response_transfer_size)+" in "+response_time_str
+            stats_string += "s   "+self.g["speed"]+size_str(self.response_transfer_size/self.response_time, suffix="b")+"/s"
+        else:
+            stats_string = ""
+
+        if self.status == Browser.NO_PATH:
+            return "No path to destination known"
+        elif self.status == Browser.PATH_REQUESTED:
+            return "Path requested, waiting for path..."
+        elif self.status == Browser.ESTABLISHING_LINK:
+            return "Establishing link..."
+        elif self.status == Browser.LINK_TIMEOUT:
+            return "Link establishment timed out"
+        elif self.status == Browser.LINK_ESTABLISHED:
+            return "Link established"
+        elif self.status == Browser.REQUESTING:
+            return "Sending request..."
+        elif self.status == Browser.REQUEST_SENT:
+            return "Request sent, awaiting response..."
+        elif self.status == Browser.REQUEST_FAILED:
+            return "Request failed"
+        elif self.status == Browser.REQUEST_TIMEOUT:
+            return "Request timed out"
+        elif self.status == Browser.RECEIVING_RESPONSE:
+            return "Receiving response..."
+        elif self.status == Browser.DONE:
+            if self.saved_file_name == None:
+                return "Done"+stats_string
+            else:
+                return "Saved "+str(self.saved_file_name)+stats_string
+        elif self.status == Browser.DISCONECTED:
+            return "Disconnected"
+        else:
+            return "Browser Status Unknown"
+
+
+class ResponseProgressBar(urwid.ProgressBar):
+    def get_text(self):
+        return "Receiving response "+super().get_text()
+
+# A convenience function for printing a human-
+# readable file size
+def size_str(num, suffix='B'):
+    units = ['','K','M','G','T','P','E','Z']
+    last_unit = 'Y'
+
+    if suffix == 'b':
+        num *= 8
+        units = ['','K','M','G','T','P','E','Z']
+        last_unit = 'Y'
+
+    for unit in units:
+        if abs(num) < 1000.0:
+            if unit == "":
+                return "%.0f%s%s" % (num, unit, suffix)
+            else:
+                return "%.2f%s%s" % (num, unit, suffix)
+        num /= 1000.0
+
+    return "%.2f%s%s" % (num, last_unit, suffix)

nomadnet/ui/textui/Config.py

@@ -0,0 +1,81 @@
+import nomadnet
+import urwid
+import platform
+
+class ConfigDisplayShortcuts():
+    def __init__(self, app):
+        import urwid
+        self.app = app
+
+        self.widget = urwid.AttrMap(urwid.Text(""), "shortcutbar")
+
+class ConfigFiller(urwid.WidgetWrap):
+    def __init__(self, widget, app):
+        self.app = app
+        self.filler = urwid.Filler(widget, "top")
+        urwid.WidgetWrap.__init__(self, self.filler)
+
+
+    def keypress(self, size, key):
+        if key == "up":
+            self.app.ui.main_display.frame.set_focus("header")
+            
+        return super(ConfigFiller, self).keypress(size, key)
+
+class ConfigDisplay():
+    def __init__(self, app):
+        import urwid
+        self.app = app
+
+        def open_editor(sender):
+            self.editor_term = EditorTerminal(self.app, self)
+            self.widget = urwid.LineBox(self.editor_term)
+            self.app.ui.main_display.update_active_sub_display()
+            self.app.ui.main_display.frame.set_focus("body")
+            self.editor_term.term.change_focus(True)
+
+        pile = urwid.Pile([
+            urwid.Text(("body_text", "\nTo change the configuration, edit the config file located at:\n\n"+self.app.configpath+"\n\nRestart Nomad Network for changes to take effect\n"), align="center"),
+            urwid.Padding(urwid.Button("Open Editor", on_press=open_editor), width=15, align="center"),
+        ])
+
+        self.config_explainer = ConfigFiller(pile, self.app)
+        self.shortcuts_display = ConfigDisplayShortcuts(self.app)
+        self.widget = self.config_explainer
+
+    def shortcuts(self):
+        return self.shortcuts_display
+
+class EditorTerminal(urwid.WidgetWrap):
+    def __init__(self, app, parent):
+        self.app = app
+        self.parent = parent
+        editor_cmd = self.app.config["textui"]["editor"]
+
+        # The "editor" alias is unavailable on Darwin,
+        # so we replace it with nano.
+        if platform.system() == "Darwin" and editor_cmd == "editor":
+            editor_cmd = "nano"
+
+        self.term = urwid.Terminal(
+            (editor_cmd, self.app.configpath),
+            encoding='utf-8',
+            main_loop=self.app.ui.loop,
+        )
+
+        def quit_term(*args, **kwargs):
+            self.parent.widget = self.parent.config_explainer
+            self.app.ui.main_display.update_active_sub_display()
+            self.app.ui.main_display.show_config(None)
+            self.app.ui.main_display.request_redraw()
+
+        urwid.connect_signal(self.term, 'closed', quit_term)
+
+        urwid.WidgetWrap.__init__(self, self.term)
+
+
+    def keypress(self, size, key):
+        # TODO: Decide whether there should be a way to get out while editing
+        #if key == "up":
+        #    nomadnet.NomadNetworkApp.get_shared_instance().ui.main_display.frame.set_focus("header")   
+        return super(EditorTerminal, self).keypress(size, key)

nomadnet/ui/textui/Conversations.py

@@ -1,4 +1,5 @@
 import RNS
+import os
 import time
 import nomadnet
 import LXMF
@@ -19,7 +20,7 @@ class ConversationDisplayShortcuts():
     def __init__(self, app):
         self.app = app
 
-        self.widget = urwid.AttrMap(urwid.Text("[C-d] Send  [C-k] Clear  [C-w] Close  [C-t] Editor Type  [C-p] Purge"), "shortcutbar")
+        self.widget = urwid.AttrMap(urwid.Text("[C-d] Send  [C-k] Clear Editor  [C-w] Close  [C-t] Editor Type  [C-p] Purge  [C-x] Clear History"), "shortcutbar")
 
 class ConversationsArea(urwid.LineBox):
     def keypress(self, size, key):
@@ -86,7 +87,6 @@ class ConversationsDisplay():
         for conversation in self.app.conversations():
             conversation_list_widgets.append(self.conversation_list_widget(conversation))
 
-        walker = urwid.SimpleFocusListWalker(conversation_list_widgets)
         self.list_widgets = conversation_list_widgets
         self.ilb = IndicativeListBox(
             self.list_widgets,
@@ -127,6 +127,7 @@ class ConversationsDisplay():
         self.columns_widget.contents[0] = (overlay, options)
 
     def edit_selected_in_directory(self):
+        g = self.app.ui.glyphs
         self.dialog_open = True
         source_hash_text = self.ilb.get_selected_item().source_hash
         display_name = self.ilb.get_selected_item().display_name
@@ -195,7 +196,7 @@ class ConversationsDisplay():
 
         source_is_known = self.app.directory.is_known(bytes.fromhex(source_hash_text))
         if source_is_known:
-            known_section = urwid.Divider("\u2504")
+            known_section = urwid.Divider(g["divider1"])
         else:
             def query_action(sender, user_data):
                 self.close_conversation_by_hash(user_data)
@@ -206,12 +207,12 @@ class ConversationsDisplay():
                     (urwid.Button("OK", on_press=dismiss_dialog), options)
                 ]
             query_button = urwid.Button("Query network for keys", on_press=query_action, user_data=source_hash_text)
-            known_section = urwid.Pile([urwid.Divider("\u2504"), urwid.Text("\u2139\n", align="center"), urwid.Text("The identity of this peer is not known, and you cannot currently communicate.\n", align="center"), query_button, urwid.Divider("\u2504")])
+            known_section = urwid.Pile([urwid.Divider(g["divider1"]), urwid.Text(g["info"]+"\n", align="center"), urwid.Text("The identity of this peer is not known, and you cannot currently communicate.\n", align="center"), query_button, urwid.Divider(g["divider1"])])
 
         dialog_pile = urwid.Pile([
             selected_id_widget,
             e_name,
-            urwid.Divider("\u2504"),
+            urwid.Divider(g["divider1"]),
             r_untrusted,
             r_unknown,
             r_trusted,
@@ -315,13 +316,43 @@ class ConversationsDisplay():
             self.ilb.select_item(ilb_position)
         nomadnet.NomadNetworkApp.get_shared_instance().ui.loop.draw_screen()
 
+        if self.currently_displayed_conversation != None:
+            if self.app.conversation_is_unread(self.currently_displayed_conversation):
+                self.app.mark_conversation_read(self.currently_displayed_conversation)
+                try:
+                    if os.path.isfile(self.app.conversationpath + "/" + self.currently_displayed_conversation + "/unread"):
+                        os.unlink(self.app.conversationpath + "/" + self.currently_displayed_conversation + "/unread")
+                except Exception as e:
+                    raise e
+
 
 
 
     def display_conversation(self, sender=None, source_hash=None):
+        if self.currently_displayed_conversation != None:
+            if self.app.conversation_is_unread(self.currently_displayed_conversation):
+                self.app.mark_conversation_read(self.currently_displayed_conversation)
+
         self.currently_displayed_conversation = source_hash
         options = self.widget.options("weight", 1-ConversationsDisplay.list_width)
         self.widget.contents[1] = (self.make_conversation_widget(source_hash), options)
+        if source_hash == None:
+            self.widget.set_focus_column(0)
+        else:
+            if self.app.conversation_is_unread(source_hash):
+                self.app.mark_conversation_read(source_hash)
+                self.update_conversation_list()
+
+            self.widget.set_focus_column(1)
+            conversation_position = None
+            index = 0
+            for widget in self.list_widgets:
+                if widget.source_hash == source_hash:
+                    conversation_position = index
+                index += 1
+
+            if conversation_position != None:
+                self.ilb.select_item(conversation_position)
         
 
     def make_conversation_widget(self, source_hash):
@@ -359,9 +390,12 @@ class ConversationsDisplay():
         trust_level  = conversation[2]
         display_name = conversation[1]
         source_hash  = conversation[0]
+        unread       = conversation[4]
+
+        g = self.app.ui.glyphs
 
         if trust_level == DirectoryEntry.UNTRUSTED:
-            symbol        = "\u2715"
+            symbol        = g["cross"]
             style         = "list_untrusted"
             focus_style   = "list_focus_untrusted"
         elif trust_level == DirectoryEntry.UNKNOWN:
@@ -369,24 +403,30 @@ class ConversationsDisplay():
             style         = "list_unknown"
             focus_style   = "list_focus"
         elif trust_level == DirectoryEntry.TRUSTED:
-            symbol        = "\u2713"
+            symbol        = g["check"]
             style         = "list_trusted"
             focus_style   = "list_focus_trusted"
         elif trust_level == DirectoryEntry.WARNING:
-            symbol        = "\u26A0"
+            symbol        = g["warning"]
             style         = "list_warning"
             focus_style   = "list_focus"
         else:
-            symbol        = "\u26A0"
+            symbol        = g["warning"]
             style         = "list_untrusted"
             focus_style   = "list_focus_untrusted"
 
         display_text = symbol
+
         if display_name != None and display_name != "":
             display_text += " "+display_name
 
         if trust_level != DirectoryEntry.TRUSTED:
             display_text += " <"+source_hash+">"
+        else:
+            if unread:
+                if source_hash != self.currently_displayed_conversation:
+                    display_text += " "+g["unread"]
+
 
         widget = ListEntry(display_text)
         urwid.connect_signal(widget, "click", self.display_conversation, conversation[0])
@@ -467,6 +507,8 @@ class ConversationFrame(urwid.Frame):
 
 class ConversationWidget(urwid.WidgetWrap):
     def __init__(self, source_hash):
+        self.app = nomadnet.NomadNetworkApp.get_shared_instance()
+        g = self.app.ui.glyphs
         if source_hash == None:
             self.frame = None
             display_widget = urwid.LineBox(urwid.Filler(urwid.Text("\n  No conversation selected"), "top"))
@@ -496,7 +538,7 @@ class ConversationWidget(urwid.WidgetWrap):
 
                 header = None
                 if self.conversation.trust_level == DirectoryEntry.UNTRUSTED:
-                    header = urwid.AttrMap(urwid.Padding(urwid.Text("\u26A0 Warning: Conversation with untrusted peer \u26A0", align="center")), "msg_warning_untrusted")
+                    header = urwid.AttrMap(urwid.Padding(urwid.Text(g["warning"]+" Warning: Conversation with untrusted peer "+g["warning"], align="center")), "msg_warning_untrusted")
 
                 self.minimal_editor = urwid.AttrMap(msg_editor, "msg_editor")
                 self.minimal_editor.name = "minimal_editor"
@@ -535,6 +577,31 @@ class ConversationWidget(urwid.WidgetWrap):
                 
                 urwid.WidgetWrap.__init__(self, self.display_widget)
 
+    def clear_history_dialog(self):
+        def dismiss_dialog(sender):
+            self.dialog_open = False
+            self.conversation_changed(None)
+
+        def confirmed(sender):
+            self.dialog_open = False
+            self.conversation.clear_history()
+            self.conversation_changed(None)
+
+
+        dialog = DialogLineBox(
+            urwid.Pile([
+                urwid.Text("Clear conversation history\n", align="center"),
+                urwid.Columns([("weight", 0.45, urwid.Button("Yes", on_press=confirmed)), ("weight", 0.1, urwid.Text("")), ("weight", 0.45, urwid.Button("No", on_press=dismiss_dialog))])
+            ]), title="?"
+        )
+        dialog.delegate = self
+        bottom = self.messagelist
+
+        overlay = urwid.Overlay(dialog, bottom, align="center", width=34, valign="middle", height="pack", left=2, right=2)
+
+        self.frame.contents["body"] = (overlay, self.frame.options())
+        self.frame.set_focus("body")
+    
     def toggle_editor(self):
         if self.full_editor_active:
             self.frame.contents["footer"] = (self.minimal_editor, None)
@@ -544,12 +611,13 @@ class ConversationWidget(urwid.WidgetWrap):
             self.full_editor_active = True
 
     def check_editor_allowed(self):
+        g = self.app.ui.glyphs
         if self.frame:
             allowed = nomadnet.NomadNetworkApp.get_shared_instance().directory.is_known(bytes.fromhex(self.source_hash))
             if allowed:
                 self.frame.contents["footer"] = (self.minimal_editor, None)
             else:
-                warning = urwid.AttrMap(urwid.Padding(urwid.Text("\u2139 You cannot currently communicate with this peer, since it's identity keys are unknown", align="center")), "msg_header_caution")
+                warning = urwid.AttrMap(urwid.Padding(urwid.Text(g["info"]+" You cannot currently communicate with this peer, since it's identity keys are not known", align="center")), "msg_header_caution")
                 self.frame.contents["footer"] = (warning, None)
 
     def toggle_focus_area(self):
@@ -574,6 +642,8 @@ class ConversationWidget(urwid.WidgetWrap):
             self.conversation_changed(None)
         elif key == "ctrl t":
             self.toggle_editor()
+        elif key == "ctrl x":
+            self.clear_history_dialog()
         else:
             return super(ConversationWidget, self).keypress(size, key)
 
@@ -626,34 +696,35 @@ class ConversationWidget(urwid.WidgetWrap):
 class LXMessageWidget(urwid.WidgetWrap):
     def __init__(self, message):
         app = nomadnet.NomadNetworkApp.get_shared_instance()
+        g = app.ui.glyphs
         self.timestamp = message.get_timestamp()
         time_format = app.time_format
         message_time = datetime.fromtimestamp(self.timestamp)
         encryption_string = ""
         if message.get_transport_encrypted():
-            encryption_string = " [\U0001F512"+str(message.get_transport_encryption())+"]"
+            encryption_string = " ["+g["lock"]+" "+str(message.get_transport_encryption())+"]"
         else:
-            encryption_string = " [\U0001F513"+str(message.get_transport_encryption())+"]"
+            encryption_string = " ["+g["unlock"]+" "+str(message.get_transport_encryption())+"]"
         
         title_string = message_time.strftime(time_format)+encryption_string
 
         if app.lxmf_destination.hash == message.lxm.source_hash:
             if message.lxm.state == LXMF.LXMessage.DELIVERED:
                 header_style = "msg_header_delivered"
-                title_string = "\u2713 " + title_string
+                title_string = g["check"]+" "+title_string
             elif message.lxm.state == LXMF.LXMessage.FAILED:
                 header_style = "msg_header_failed"
-                title_string = "\u2715 " + title_string
+                title_string = g["cross"]+" "+title_string
             else:
                 header_style = "msg_header_sent"
-                title_string = "\u2192 " + title_string
+                title_string = g["arrow_r"]+" "+title_string
         else:
             if message.signature_validated():
                 header_style = "msg_header_ok"
-                title_string = "\u2713 " + title_string
+                title_string = g["check"]+" "+title_string
             else:
                 header_style = "msg_header_caution"
-                title_string = "\u26A0 "+message.get_signature_description() + "\n  " + title_string
+                title_string = g["warning"]+" "+message.get_signature_description() + "\n  " + title_string
 
         if message.get_title() != "":
             title_string += " | " + message.get_title()

nomadnet/ui/textui/Guide.py

@@ -0,0 +1,575 @@
+import RNS
+import urwid
+import nomadnet
+from nomadnet.vendor.additional_urwid_widgets import IndicativeListBox, MODIFIER_KEY
+from .MicronParser import markup_to_attrmaps
+from nomadnet.vendor.Scrollable import *
+
+class GuideDisplayShortcuts():
+    def __init__(self, app):
+        self.app = app
+        g = app.ui.glyphs
+
+        self.widget = urwid.AttrMap(urwid.Padding(urwid.Text(""), align="left"), "shortcutbar")
+
+class ListEntry(urwid.Text):
+    _selectable = True
+
+    signals = ["click"]
+
+    def keypress(self, size, key):
+        """
+        Send 'click' signal on 'activate' command.
+        """
+        if self._command_map[key] != urwid.ACTIVATE:
+            return key
+
+        self._emit('click')
+
+    def mouse_event(self, size, event, button, x, y, focus):
+        """
+        Send 'click' signal on button 1 press.
+        """
+        if button != 1 or not urwid.util.is_mouse_press(event):
+            return False
+
+        self._emit('click')
+        return True
+
+class SelectText(urwid.Text):
+    _selectable = True
+
+    signals = ["click"]
+
+    def keypress(self, size, key):
+        """
+        Send 'click' signal on 'activate' command.
+        """
+        if self._command_map[key] != urwid.ACTIVATE:
+            return key
+
+        self._emit('click')
+
+    def mouse_event(self, size, event, button, x, y, focus):
+        """
+        Send 'click' signal on button 1 press.
+        """
+        if button != 1 or not urwid.util.is_mouse_press(event):
+            return False
+
+        self._emit('click')
+        return True
+
+class GuideEntry(urwid.WidgetWrap):
+    def __init__(self, app, parent, reader, topic_name):
+        self.app = app
+        self.parent = parent
+        self.reader = reader
+        self.last_keypress = None
+        self.topic_name = topic_name
+        g = self.app.ui.glyphs
+
+        widget = ListEntry(topic_name)
+        urwid.connect_signal(widget, "click", self.display_topic, self.topic_name)
+
+        style = "topic_list_normal"
+        focus_style = "list_focus"
+        self.display_widget = urwid.AttrMap(widget, style, focus_style)
+        urwid.WidgetWrap.__init__(self, self.display_widget)
+
+    def display_topic(self, event, topic):
+        markup = TOPICS[topic]
+        attrmaps = markup_to_attrmaps(markup, url_delegate=None)
+
+        topic_position = None
+        index = 0
+        for topic in self.parent.topic_list:
+            widget = topic._original_widget
+            if widget.topic_name == self.topic_name:
+                topic_position = index
+            index += 1
+
+        if topic_position != None:
+            self.parent.ilb.select_item(topic_position)
+
+        self.reader.set_content_widgets(attrmaps)
+        self.reader.focus_reader()
+
+
+    def micron_released_focus(self):
+        self.reader.focus_topics()
+
+class TopicList(urwid.WidgetWrap):
+    def __init__(self, app, guide_display):
+        self.app = app
+        g = self.app.ui.glyphs
+
+        self.first_run_entry = GuideEntry(self.app, self, guide_display, "First Run")
+
+        self.topic_list = [
+            GuideEntry(self.app, self, guide_display, "Introduction"),
+            GuideEntry(self.app, self, guide_display, "Hosting a Node"),
+            GuideEntry(self.app, self, guide_display, "Markup"),
+            self.first_run_entry,
+            GuideEntry(self.app, self, guide_display, "Credits & Licenses"),
+        ]
+
+        self.ilb = IndicativeListBox(
+            self.topic_list,
+            initialization_is_selection_change=False,
+            highlight_offFocus="list_off_focus"
+        )
+
+        urwid.WidgetWrap.__init__(self, urwid.LineBox(self.ilb, title="Topics"))
+
+
+    def keypress(self, size, key):
+        if key == "up" and (self.ilb.first_item_is_selected()):
+            nomadnet.NomadNetworkApp.get_shared_instance().ui.main_display.frame.set_focus("header")
+            
+        return super(TopicList, self).keypress(size, key)
+
+class GuideDisplay():
+    list_width = 0.33
+
+    def __init__(self, app):
+        self.app = app
+        g = self.app.ui.glyphs
+
+        topic_text = urwid.Text("\n  No topic selected", align="left")
+
+        self.left_area  = TopicList(self.app, self)
+        self.right_area = urwid.LineBox(urwid.Filler(topic_text, "top"))
+
+
+        self.columns = urwid.Columns(
+            [
+                ("weight", GuideDisplay.list_width, self.left_area),
+                ("weight", 1-GuideDisplay.list_width, self.right_area)
+            ],
+            dividechars=0, focus_column=0
+        )
+
+        self.shortcuts_display = GuideDisplayShortcuts(self.app)
+        self.widget = self.columns
+
+        if self.app.firstrun:
+            entry = self.left_area.first_run_entry
+            entry.display_topic(entry.display_topic, entry.topic_name)
+
+    def set_content_widgets(self, new_content):
+        options = self.columns.options(width_type="weight", width_amount=1-GuideDisplay.list_width)
+        pile = urwid.Pile(new_content)
+        #content = urwid.LineBox(urwid.Filler(pile, "top"))
+        content = urwid.LineBox(urwid.AttrMap(ScrollBar(Scrollable(pile), thumb_char="\u2503", trough_char=" "), "scrollbar"))
+
+        self.columns.contents[1] = (content, options)
+
+    def shortcuts(self):
+        return self.shortcuts_display
+
+    def focus_topics(self):
+        self.columns.focus_position = 0
+
+    def focus_reader(self):
+        self.columns.focus_position = 1
+
+
+TOPIC_INTRODUCTION = '''>Nomad Network
+
+`c`*Communicate Freely.`*
+`a
+
+The intention with this program is to provide a tool to that allows you to build private and resilient communications platforms that are in complete control and ownership of the people that use them.
+
+Nomad Network is build on LXMF and Reticulum, which together provides the cryptographic mesh functionality and peer-to-peer message routing that Nomad Network relies on. This foundation also makes it possible to use the program over a very wide variety of communication mediums, from packet radio to gigabit fiber.
+
+Nomad Network does not need any connections to the public internet to work. In fact, it doesn't even need an IP or Ethernet network. You can use it entirely over packet radio, LoRa or even serial lines. But if you wish, you can bridge islanded Reticulum networks over the Internet or private ethernet networks, or you can build networks running completely over the Internet. The choice is yours.
+
+The current version of the program should be considered an alpha release. The program works well, but there will most probably be bugs and possibly sub-optimal performance in some scenarios. On the other hand, this is the best time to have an influence on the direction of the development of Nomad Network. To do so, join the discussion on the Nomad Network project on GitHub.
+
+>Concepts and Terminology
+
+The following section will briefly introduce various concepts and terms used in the program.
+
+>>Peer
+
+A `*peer`* refers to another Nomad Network client, which will generally be operated by another person. But since Nomad Network is a general LXMF client, it could also be any other LXMF client, program, automated system or machine that can communicate over LXMF.
+
+>>Announces
+
+An `*announce`* can be sent by any peer on the network, which will notify other peers of its existence, and contains the cryptographic keys that allows other peers to communicate with it.
+
+In the `![ Network ]`! section of the program, you can monitor announces on the network, initiate conversations with announced peers, and announce your own peer on the network. You can also connect to nodes on the network and browse information shared by them.
+
+>>Conversations
+
+Nomad Network uses the term `*conversation`* to signify both direct peer-to-peer messaging threads, and also discussion threads with an arbitrary number of participants that might change over time.
+
+Both things like discussion forums and chat threads can be encapsulated as conversations in Nomad Network. The user interface will indicate the different characteristics a conversation can take, and also what form of transport encryption messages within used.
+
+In the `![ Conversations ]`! part of the program you can view and interact with all currently active conversations. You can also edit nickname and trust settings for peers here.
+
+>>Node
+
+A Nomad Network `*node`* is an instance of the Nomad Network program that has been configured to host information for other peers and help propagate messages and information on the network.
+
+Nodes can host pages (similar to webpages) written in a markup-language called `*micron`*, as well as make files and other resources available for download for peers on the network. Nodes are also integral in allowing forum/discussion threads to exist and propagate on the network.
+
+If no nodes exist on a network, all peers will still be able to communicate directly peer-to-peer, but both endpoints of a conversation will need to be online at the same time to converse. When nodes exist on the network, messages will be held and syncronised between nodes for deferred delivery if the destination peer is unavailable.
+
+'''
+
+TOPIC_HOSTING = '''>Hosting a Node
+
+To host a node on the network, you must enable it in the configuration file, by setting `*enable_node`* directive to `*yes`*. You should also configure the other node-related parameters such as the node name and announce interval settings. Once node hosting has been enabled in the configuration, Nomad Network will start hosting your node as soon as the program is lauched, and other peers on the network will be able to connect and interact with content on your node.
+
+By default, no content is defined, apart from a short placeholder home page. To learn how to add your own content, read on.
+
+>>Pages
+
+Nomad Network nodes can host pages similar to web pages, that other peers can read and interact with. Pages are written in a compact markup language called `*micron`*. To learn how to write formatted pages with micron, see the `*Markup`* section of this guide (which is, itself, written in micron). Pages can be linked arbitrarily with hyperlinks, that can also link to pages (or other resources) on other nodes.
+
+To add pages to your node, place micron files in the `*pages`* directory of your Nomad Network programs `*storage`* directory. By default, the path to this will be `!~/.nomadnetwork/storage/pages`!. You should probably create the file `!index.mu`! first, as this is the page that will get served by default to a connecting peer.
+
+Pages are static in this version, but the next release of Nomad Network will add the ability to use a preprocessor such as PHP, bash, Python (or whatever you prefer) to generate dynamic pages.
+
+>>Files
+
+Like pages, you can place files you want to make available in the `!~/.nomadnetwork/storage/files`! directory. To let a peer download a file, you should create a link to it in one of your pages.
+
+>>Links and URLs
+
+Links to pages and resources in Nomad Network use a simple URL format. Here is an example:
+
+`!1385edace36466a6b3dd:/page/index.mu`!
+
+The first part is the 10 byte destination address of the node (represented as readable hexadecimal), followed by the `!:`! character. Everything after the `!:`! represents the request path.
+
+By convention, Nomad Network nodes maps all hosted pages under the `!/page`! path, and all hosted files under the `!/file`! path. You can create as many subdirectories for pages and files as you please, and they will be automatically mapped to corresponding request paths.
+
+You can omit the destination address of the node, if you are reffering to a local page or file. You must still keep the `!:`! character. In such a case, the URL to a page could look like this:
+
+`!:/page/other_page.mu`!
+
+The URL to a local file could look like this:
+
+`!:/file/document.pdf`!
+
+Links can be inserted into micron documents. See the `*Markup`* section of this guide for info on how to do so.
+
+'''
+
+TOPIC_CONVERSATIONS = '''>Conversations
+
+Conversations in Nomad Network
+'''
+
+
+TOPIC_FIRST_RUN = '''>First Time Information
+
+Hi there. This first run message will only appear once. It contains a few pointers on getting started with Nomad Network, and getting the most out of the program.
+
+You're currently located in the guide section of the program. I'm sorry I had to drag you here by force, but it will only happen this one time, I promise. If you ever get lost, return here and peruse the list of topics you see on the left. I will do my best to fill it with answers to mostly anything about Nomad Network.
+
+To get the most out of Nomad Network, you will need a terminal that supports UTF-8 and at least 256 colors, ideally true-color. If your terminal supports true-color, you can go to the `![ Config ]`! menu item, launch the editor and change the configuration.
+
+If you don't already have a Nerd Font installed (see https://www.nerdfonts.com/), I also highly recommend to do so, since it will greatly expand the amount of glyphs, icons and graphics that Nomad Network can use. Once you have your terminal set up with a Nerd Font, go to the `![ Config ]`! menu item and enable Nerd Fonts in the configuration instead of normal unicode glyphs.
+
+Nomad Network expects that you are already connected to some form of Reticulum network. That could be as simple as the default UDP-based demo interface on your local ethernet network. This short guide won't go into any details on building, but you will find other entries in the guide that deal with network setup and configuration.
+
+At least, if Nomad Network launches, it means that it is connected to a running Reticulum instance, that should in turn be connected to `*something`*, which should get you started.
+
+For more some more information, you can also read the `*Introduction`* section of this guide.
+
+Now go out there and explore. This is still early days. See what you can find and create.
+
+>>>>>>>>>>>>>>>
+-\u223f
+<
+
+'''
+
+TOPIC_LICENSES = '''>Thanks, Acknowledgements and Licenses
+
+This program uses various other software components, without which Nomad Network would not have been possible. Sincere thanks to the authors and contributors of the following projects
+
+>>>
+ - `!Cryptography.io`! by `*pyca`*
+   https://cryptography.io/
+   BSD License
+
+ - `!Urwid`! by `*Ian Ward`*
+   http://urwid.org/
+   LGPL-2.1 License
+
+ - `!Additional Urwid Widgets`! by `*AFoeee`*
+   https://github.com/AFoeee/additional_urwid_widgets
+   MIT License
+
+ - `!Scrollable`! by `*rndusr`*
+   https://github.com/rndusr/stig/blob/master/stig/tui/scroll.py
+   GPLv3 License
+
+ - `!Configobj`! by `*Michael Foord`*
+   https://github.com/DiffSK/configobj
+   BSD License
+
+ - `!Reticulum Network Stack`! by `*unsignedmark`*
+   https://github.com/markqvist/Reticulum
+   MIT License
+
+ - `!LXMF`! by `*unsignedmark`*
+   https://github.com/markqvist/LXMF
+   MIT License
+'''
+
+
+TOPIC_MARKUP = '''>Outputting Formatted Text
+
+
+>>>>>>>>>>>>>>>
+-\u223f
+<
+
+`c`!Hello!`! This is output from `*micron`*
+Micron generates formatted text for your terminal
+`a
+
+>>>>>>>>>>>>>>>
+-\u223f
+<
+
+
+Nomad Network supports a simple and functional markup language called `*micron`*. If you are familiar with `*markdown`* or `*HTML`*, you will feel right at home writing pages with micron.
+
+With micron you can easily create structured documents and pages with formatting, colors, glyphs and icons, ideal for display in terminals.
+
+>>Recommendations and Requirements
+
+While micron can output formatted text to even the most basic terminal, there's a few capabilities your terminal `*must`* support to display micron output correctly, and some that, while not strictly necessary, make the experience a lot better.
+
+Formatting such as `_underline`_, `!bold`! or `*italics`* will be displayed if your terminal supports it.
+
+If you are having trouble getting micron output to display correctly, try using `*gnome-terminal`*, which should work with all formatting options out of the box. Most other terminals will work fine as well, but you might have to change some settings to get certain formatting to display correctly.
+
+>>>Encoding
+
+All micron sources are intepreted as UTF-8, and micron assumes it can output UTF-8 characters to the terminal. If your terminal does not support UTF-8, output will be faulty.
+
+>>>Colors
+
+Shading and coloring text and backgrounds is integral to micron output, and while micron will attempt to gracefully degrade output even to 1-bit terminals, you will get the best output with terminals supporting at least 256 colors. True-color support is recommended.
+
+>>>Terminal Font
+
+While any unicode capable font can be used with micron, it's highly recommended to use a `*"Nerd Font"`* (see https://www.nerdfonts.com/), which will add a lot of extra glyphs and icons to your output.
+
+> A Few Demo Outputs
+
+`F222`Bddd
+
+`cWith micron, you can control layout and presentation
+`a
+
+``
+
+`B33f
+
+You can change background ...
+
+``
+
+`B393
+
+`r`F320... and foreground colors`f
+`a
+
+`b
+
+If you want to make a break, horizontal dividers can be inserted. They can be plain, like the one below this text, or you can style them with unicode characters and glyphs, like the wavy divider in the beginning of this document.
+
+-
+
+`cText can be `_underlined`_, `!bold`! or `*italic`*.
+
+You can also `_`*`!`B5d5`F222combine`f`b`_ `_`Ff00f`Ff80o`Ffd0r`F9f0m`F0f2a`F0fdt`F07ft`F43fi`F70fn`Fe0fg`` for some fabulous effects.
+`a
+
+
+>>>Sections and Headings
+
+You can define an arbitrary number of sections and sub sections, each with their own named headings. Text inside sections will be automatically indented.
+
+-
+
+If you place a divider inside a section, it will adhere to the section indents.
+
+>>>>>
+If no heading text is defined, the section will appear as a sub-section without a header. This can be useful for creating indented blocks of text, like this one.
+
+>Micron tags
+
+Tags are used to format text with micron. Some tags can appear anywhere in text, and some must appear at the beginning of a line. If you need to write text that contains a sequence that would be interpreted as a tag, you can escape it with the character \\.
+
+In the following sections, the different tags will be introduced. Any styling set within micron can be reset to the default style by using the special \\`\\` tag anywhere in the markup, which will immediately remove any formatting previously specified. 
+
+>>Alignment
+
+To control text alignment use the tag \\`c to center text, \\`l to left-align, \\`r to right-align, and \\`a to return to the default alignment of the document. Alignment tags must appear at the beginning of a line. Here is an example:
+
+`Faaa
+`=
+`cThis line will be centered.
+So will this.
+`aThe alignment has now been returned to default.
+`rThis will be aligned to the right
+``
+`=
+``
+
+The above markup produces the following output:
+
+`Faaa`B333
+
+`cThis line will be centered.
+So will this.
+
+`aThe alignment has now been returned to default.
+
+`rThis will be aligned to the right
+
+``
+
+
+>>Formatting
+
+Text can be formatted as `!bold`! by using the \\`! tag, `_underline`_ by using the \\`_ tag and `*italic`* by using the \\`* tag.
+
+Here's an example of formatting text:
+
+`Faaa
+`=
+We shall soon see `!bold`! paragraphs of text decorated with `_underlines`_ and `*italics`*. Some even dare `!`*`_combine`` them!
+`=
+``
+
+The above markup produces the following output:
+
+`Faaa`B333
+
+We shall soon see `!bold`! paragraphs of text decorated with `_underlines`_ and `*italics`*. Some even dare `!`*`_combine`!`*`_ them!
+
+``
+
+
+>>Sections
+
+To create sections and subsections, use the > tag. This tag must be placed at the beginning of a line. To specify a sub-section of any level, use any number of > tags. If text is placed after a > tag, it will be used as a heading.
+
+Here is an example of sections:
+
+`Faaa
+`=
+>High Level Stuff
+This is a section. It contains this text.
+
+>>Another Level
+This is a sub section.
+
+>>>Going deeper
+A sub sub section. We could continue, but you get the point.
+
+>>>>
+Wait! It's worth noting that we can also create sections without headings. They look like this.
+`=
+``
+
+The above markup produces the following output:
+
+`Faaa`B333
+>High Level Stuff
+This is a section. It contains this text.
+
+>>Another Level
+This is a sub section.
+
+>>>Going deeper
+A sub sub section. We could continue, but you get the point.
+
+>>>>
+Wait! It's worth noting that we can also create sections without headings. They look like this.
+``
+
+
+>Colors
+
+Foreground colors can be specified with the \\`F tag, followed by three hexadecimal characters. To return to the default foreground color, use the \\`f tag. Background color is specified in the same way, but by using the \\`B and \\`b tags.
+
+Here's a few examples:
+
+`Faaa
+`=
+You can use `B5d5`F222 color `f`b `Ff00f`Ff80o`Ffd0r`F9f0m`F0f2a`F0fdt`F07ft`F43fi`F70fn`Fe0fg`f for some fabulous effects.
+`=
+``
+
+The above markup produces the following output:
+
+`Faaa`B333
+
+You can use `B5d5`F222 color `f`B333 `Ff00f`Ff80o`Ffd0r`F9f0m`F0f2a`F0fdt`F07ft`F43fi`F70fn`Fe0fg`f for some fabulous effects.
+
+``
+
+
+>Links
+
+Links to pages, files or other resources can be created with the \\`[ tag, which should always be terminated with a closing ]. You can create links with and without labels, it is up to you to control the formatting of links with other tags. Although not strictly necessary, it is good practice to at least format links with underlining.
+
+Here's a few examples:
+
+`Faaa
+`=
+Here is a link without any label: `[1385edace36466a6b3dd:/page/index.mu]
+
+This is a `[labeled link`1385edace36466a6b3dd:/page/index.mu] to the same page, but it's hard to see if you don't know it
+
+Here is `F00a`_`[a more visible link`1385edace36466a6b3dd:/page/index.mu]`_`f
+`=
+``
+
+The above markup produces the following output:
+
+`Faaa`B333
+
+Here is a link without any label: `[1385edace36466a6b3dd:/page/index.mu]
+
+This is a `[labeled link`1385edace36466a6b3dd:/page/index.mu] to the same page, but it's hard to see if you don't know it
+
+Here is `F00f`_`[a more visible link`1385edace36466a6b3dd:/page/index.mu]`_`f
+
+``
+
+When links like these are displayed in the built-in browser, clicking on them or activating them using the keyboard will cause the browser to load the specified URL.
+
+>Literals
+
+To display literal content, for example source-code, or blocks of text that should not be interpreted by micron, you can use literal blocks, specified by the \\`= tag. Below is the source code of this entire document, presented as a literal block.
+
+-
+
+`=
+'''
+TOPIC_MARKUP += TOPIC_MARKUP.replace("`=", "\\`=") + "[ micron source for document goes here, we don't want infinite recursion now, do we? ]\n\\`="
+TOPIC_MARKUP += "\n`=\n\n>Closing Remarks\n\nIf you made it all the way here, you should be well equipped to write documents and pages using micron. Thank you for staying with me.\n\n`c\U0001F332\n"
+
+
+TOPICS = {
+    "Introduction": TOPIC_INTRODUCTION,
+    "Conversations": TOPIC_CONVERSATIONS,
+    "Hosting a Node": TOPIC_HOSTING,
+    "Markup": TOPIC_MARKUP,
+    "First Run": TOPIC_FIRST_RUN,
+    "Credits & Licenses": TOPIC_LICENSES,
+}

nomadnet/ui/textui/Log.py

@@ -0,0 +1,38 @@
+import urwid
+import nomadnet
+
+class LogDisplayShortcuts():
+    def __init__(self, app):
+        import urwid
+        self.app = app
+
+        self.widget = urwid.AttrMap(urwid.Text(""), "shortcutbar")
+
+class LogDisplay():
+    def __init__(self, app):
+        import urwid
+        self.app = app
+        self.log_term = LogTerminal(self.app)
+
+        self.shortcuts_display = LogDisplayShortcuts(self.app)
+        self.widget = urwid.LineBox(self.log_term)
+        
+    def shortcuts(self):
+        return self.shortcuts_display
+
+class LogTerminal(urwid.WidgetWrap):
+    def __init__(self, app):
+        self.app = app
+        self.log_term = urwid.Terminal(
+            ("tail", "-fn50", self.app.logfilepath),
+            encoding='utf-8',
+            escape_sequence="up"
+        )
+        urwid.WidgetWrap.__init__(self, self.log_term)
+
+
+    def keypress(self, size, key):
+        if key == "up":
+            nomadnet.NomadNetworkApp.get_shared_instance().ui.main_display.frame.set_focus("header")
+            
+        return super(LogTerminal, self).keypress(size, key)

nomadnet/ui/textui/Main.py

@@ -4,7 +4,10 @@ import time
 from .Network import *
 from .Conversations import *
 from .Directory import *
+from .Config import *
 from .Map import *
+from .Log import *
+from .Guide import *
 import urwid
 
 class SubDisplays():
@@ -13,8 +16,14 @@ class SubDisplays():
         self.network_display = NetworkDisplay(self.app)
         self.conversations_display = ConversationsDisplay(self.app)
         self.directory_display = DirectoryDisplay(self.app)
+        self.config_display = ConfigDisplay(self.app)
         self.map_display = MapDisplay(self.app)
+        self.log_display = LogDisplay(self.app)
+        self.guide_display = GuideDisplay(self.app)
 
+        if app.firstrun:
+            self.active_display = self.guide_display
+        else:
             self.active_display = self.conversations_display
 
     def active(self):
@@ -68,8 +77,8 @@ class MainFrame(urwid.Frame):
     def keypress(self, size, key):
         self.keypress_focus_check()
         
-        if key == "ctrl q":
+        #if key == "ctrl q":
-            raise urwid.ExitMainLoop
+        #    raise urwid.ExitMainLoop
 
         return super(MainFrame, self).keypress(size, key)
 
@@ -101,6 +110,18 @@ class MainDisplay():
         self.sub_displays.active_display = self.sub_displays.map_display
         self.update_active_sub_display()
 
+    def show_config(self, user_data):
+        self.sub_displays.active_display = self.sub_displays.config_display
+        self.update_active_sub_display()
+
+    def show_log(self, user_data):
+        self.sub_displays.active_display = self.sub_displays.log_display
+        self.update_active_sub_display()
+
+    def show_guide(self, user_data):
+        self.sub_displays.active_display = self.sub_displays.guide_display
+        self.update_active_sub_display()
+
     def update_active_sub_display(self):
         self.frame.contents["body"] = (self.sub_displays.active().widget, None)
         self.update_active_shortcuts()
@@ -108,6 +129,12 @@ class MainDisplay():
     def update_active_shortcuts(self):
         self.frame.contents["footer"] = (self.sub_displays.active().shortcuts().widget, None)
 
+    def request_redraw(self):
+        self.app.ui.loop.set_alarm_in(0.25, self.redraw_now)
+    
+    def redraw_now(self, sender=None, data=None):
+        self.app.ui.loop.draw_screen()
+
     def quit(self, sender=None):
         raise urwid.ExitMainLoop
 
@@ -122,16 +149,24 @@ class MenuColumns(urwid.Columns):
 class MenuDisplay():
     def __init__(self, app, handler):
         self.app = app
+        g = self.app.ui.glyphs
 
-        menu_text            = ("pack", urwid.Text(" \U00002638"))
+        menu_text            = ("pack", urwid.Text(g["decoration_menu"]))
         button_network       = (11, MenuButton("Network", on_press=handler.show_network))
         button_conversations = (17, MenuButton("Conversations", on_press=handler.show_conversations))
         button_directory     = (13, MenuButton("Directory", on_press=handler.show_directory))
         button_map           = (7,  MenuButton("Map", on_press=handler.show_map))
+        button_log           = (7,  MenuButton("Log", on_press=handler.show_log))
+        button_config        = (10, MenuButton("Config", on_press=handler.show_config))
+        button_guide         = (9,  MenuButton("Guide", on_press=handler.show_guide))
         button_quit          = (8,  MenuButton("Quit", on_press=handler.quit))
 
         # buttons = [menu_text, button_conversations, button_node, button_directory, button_map]
-        buttons = [menu_text, button_conversations, button_network, button_quit]
+        if self.app.config["textui"]["hide_guide"]:
+            buttons = [menu_text, button_conversations, button_network, button_log, button_config, button_quit]
+        else:
+            buttons = [menu_text, button_conversations, button_network, button_log, button_config, button_guide, button_quit]
+
         columns = MenuColumns(buttons, dividechars=1)
         columns.handler = handler
 

nomadnet/ui/textui/MicronParser.py

@@ -0,0 +1,493 @@
+import nomadnet
+import urwid
+import time
+from urwid.util import is_mouse_press
+from urwid.text_layout import calc_coords
+import re
+
+DEFAULT_FG = "ddd"
+DEFAULT_BG = "default"
+
+STYLES = {
+    "plain":    { "fg": DEFAULT_FG, "bg": DEFAULT_BG, "bold": False, "underline": False, "italic": False },
+    "heading1": { "fg": "222", "bg": "bbb", "bold": False, "underline": False, "italic": False },
+    "heading2": { "fg": "111", "bg": "999", "bold": False, "underline": False, "italic": False },
+    "heading3": { "fg": "000", "bg": "777", "bold": False, "underline": False, "italic": False },
+}
+
+SYNTH_STYLES = []
+SYNTH_SPECS  = {}
+
+SECTION_INDENT = 2
+INDENT_RIGHT   = 1
+
+def markup_to_attrmaps(markup, url_delegate = None):
+    attrmaps = []
+
+    state = {
+        "literal": False,
+        "depth": 0,
+        "fg_color": DEFAULT_FG,
+        "bg_color": DEFAULT_BG,
+        "formatting": {
+            "bold": False,
+            "underline": False,
+            "italic": False,
+            "strikethrough": False,
+            "blink": False,
+        },
+        "default_align": "left",
+        "align": "left",
+    }
+
+    # Split entire document into lines for
+    # processing.
+    lines = markup.split("\n");
+
+    for line in lines:
+        if len(line) > 0:
+            display_widget = parse_line(line, state, url_delegate)
+        else:
+            display_widget = urwid.Text("")
+        
+        if display_widget != None:
+            attrmap = urwid.AttrMap(display_widget, make_style(state))
+            attrmaps.append(attrmap)
+
+    return attrmaps
+
+
+def parse_line(line, state, url_delegate):
+    if len(line) > 0:
+        first_char = line[0]
+
+        # Check for literals
+        if len(line) == 2 and line == "`=":
+            state["literal"] ^= True
+            return None
+
+        # Only parse content if not in literal state
+        if not state["literal"]:
+            # Check if the command is an escape
+            if first_char == "\\":
+                line = line[1:]
+
+            # Check for section heading reset
+            elif first_char == "<":
+                state["depth"] = 0
+                return parse_line(line[1:], state, url_delegate)
+
+            # Check for section headings
+            elif first_char == ">":
+                i = 0
+                while i < len(line) and line[i] == ">":
+                    i += 1
+                    state["depth"] = i
+                
+                    for j in range(1, i+1):
+                        wanted_style = "heading"+str(i)
+                        if wanted_style in STYLES:
+                            style = STYLES[wanted_style]
+
+                line = line[state["depth"]:]
+                if len(line) > 0:
+                    latched_style = state_to_style(state)
+                    style_to_state(style, state)
+
+                    heading_style = make_style(state)
+                    output = make_output(state, line, url_delegate)
+                    
+                    style_to_state(latched_style, state)
+
+                    if len(output) > 0:
+                        first_style = output[0][0]
+
+                        heading_style = first_style
+                        output.insert(0, " "*left_indent(state))
+                        return urwid.AttrMap(urwid.Text(output, align=state["align"]), heading_style)
+                    else:
+                        return None
+                else:
+                    return None
+
+            # Check for horizontal dividers
+            elif first_char == "-":
+                if len(line) == 2:
+                    divider_char = line[1]
+                else:
+                    divider_char = "\u2500"
+                if state["depth"] == 0:
+                    return urwid.Divider(divider_char)
+                else:
+                    return urwid.Padding(urwid.Divider(divider_char), left=left_indent(state), right=right_indent(state))
+
+        output = make_output(state, line, url_delegate)
+
+        if output != None:
+            if url_delegate != None:
+                text_widget = LinkableText(output, align=state["align"], delegate=url_delegate)
+            else:
+                text_widget = urwid.Text(output, align=state["align"])
+
+            if state["depth"] == 0:
+                return text_widget
+            else:
+                return urwid.Padding(text_widget, left=left_indent(state), right=right_indent(state))
+        else:
+            return None
+    else:
+        return None
+
+def left_indent(state):
+    return (state["depth"]-1)*SECTION_INDENT
+
+def right_indent(state):
+    return (state["depth"]-1)*SECTION_INDENT
+
+def make_part(state, part):
+    return (make_style(state), part)
+
+def state_to_style(state):
+    return { "fg": state["fg_color"], "bg": state["bg_color"], "bold": state["formatting"]["bold"], "underline": state["formatting"]["underline"], "italic": state["formatting"]["italic"] }
+
+def style_to_state(style, state):
+    if style["fg"] != None:
+        state["fg_color"] = style["fg"]
+    if style["bg"] != None:
+        state["bg_color"] = style["bg"]
+    if style["bold"] != None:
+        state["formatting"]["bold"] = style["bold"]
+    if style["underline"] != None:
+        state["formatting"]["underline"] = style["underline"]
+    if style["italic"] != None:
+        state["formatting"]["italic"] = style["italic"]
+
+def make_style(state):
+    def mono_color(fg, bg):
+        return "default"
+    def low_color(color):
+        # TODO: Implement low-color mapper
+        return "default"
+    def high_color(color):
+        if color == "default":
+            return color
+        else:
+            return "#"+color
+
+    bold      = state["formatting"]["bold"]
+    underline = state["formatting"]["underline"]
+    italic    = state["formatting"]["italic"]
+    fg        = state["fg_color"]
+    bg        = state["bg_color"]
+
+    format_string = ""
+    if bold:
+        format_string += ",bold"
+    if underline:
+        format_string += ",underline"
+    if italic:
+        format_string += ",italics"
+
+    name = "micron_"+fg+"_"+bg+"_"+format_string
+    if not name in SYNTH_STYLES:
+        screen = nomadnet.NomadNetworkApp.get_shared_instance().ui.screen
+        screen.register_palette_entry(name, low_color(fg)+format_string,low_color(bg),mono_color(fg, bg)+format_string,high_color(fg)+format_string,high_color(bg))
+        
+        synth_spec = screen._palette[name]
+        SYNTH_STYLES.append(name)
+        if not name in SYNTH_SPECS:
+            SYNTH_SPECS[name] = synth_spec
+
+    return name
+
+def make_output(state, line, url_delegate):
+    output = []
+    if state["literal"]:
+        if line == "\\`=":
+            line = "`="
+        output.append(make_part(state, line))
+    else:
+        part = ""
+        mode = "text"
+        escape = False
+        skip = 0
+        for i in range(0, len(line)):
+            c = line[i]
+            if skip > 0:
+                skip -= 1
+            else:
+                if mode == "formatting":
+                    if c == "_":
+                        state["formatting"]["underline"] ^= True
+                    elif c == "!":
+                        state["formatting"]["bold"] ^= True
+                    elif c == "*":
+                        state["formatting"]["italic"] ^= True
+                    elif c == "F":
+                        if len(line) >= i+4:
+                            color = line[i+1:i+4]
+                            state["fg_color"] = color
+                            skip = 3
+                    elif c == "f":
+                        state["fg_color"] = DEFAULT_FG
+                    elif c == "B":
+                        if len(line) >= i+4:
+                            color = line[i+1:i+4]
+                            state["bg_color"] = color
+                            skip = 3
+                    elif c == "b":
+                        state["bg_color"] = DEFAULT_BG
+                    elif c == "`":
+                        state["formatting"]["bold"]      = False 
+                        state["formatting"]["underline"] = False
+                        state["formatting"]["italic"]    = False
+                        state["fg_color"] = DEFAULT_FG
+                        state["bg_color"] = DEFAULT_BG
+                        state["align"] = state["default_align"]
+                    elif c == "c":
+                        if state["align"] != "center":
+                            state["align"] = "center"
+                        else:
+                            state["align"] = state["default_align"]
+                    elif c == "l":
+                        if state["align"] != "left":
+                            state["align"] = "left"
+                        else:
+                            state["align"] = state["default_align"]
+                    elif c == "r":
+                        if state["align"] != "right":
+                            state["align"] = "right"
+                        else:
+                            state["align"] = state["default_align"]
+                    elif c == "a":
+                        state["align"] = state["default_align"]
+
+                    elif c == "[":
+                        endpos = line[i:].find("]")
+                        if endpos == -1:
+                            pass
+                        else:
+                            link_data = line[i+1:i+endpos]
+                            skip = endpos
+
+                            link_components = link_data.split("`")
+                            if len(link_components) == 1:
+                                link_label = ""
+                                link_url = link_data
+                            elif len(link_components) == 2:
+                                link_label = link_components[0]
+                                link_url = link_components[1]
+                            else:
+                                link_url = ""
+                                link_label = ""
+
+                            if len(link_url) != 0:
+                                if link_label == "":
+                                    link_label = link_url
+
+                                # First generate output until now
+                                if len(part) > 0:
+                                    output.append(make_part(state, part))
+
+                                cm = nomadnet.NomadNetworkApp.get_shared_instance().ui.colormode
+
+                                specname = make_style(state)
+                                speclist = SYNTH_SPECS[specname]
+
+                                if cm == 1:
+                                    orig_spec = speclist[0]
+                                elif cm == 16:
+                                    orig_spec = speclist[1]
+                                elif cm == 88:
+                                    orig_spec = speclist[2]
+                                elif cm == 256:
+                                    orig_spec = speclist[3]
+                                elif cm == 2**24:
+                                    orig_spec = speclist[4]
+
+                                if url_delegate != None:
+                                    linkspec = LinkSpec(link_url, orig_spec)
+                                    output.append((linkspec, link_label))
+                                else:
+                                    output.append(make_part(state, link_label)) 
+
+                                
+
+                    mode = "text"
+                    if len(part) > 0:
+                        output.append(make_part(state, part))
+
+                elif mode == "text":
+                    if c == "\\":
+                        escape = True
+                    elif c == "`":
+                        if escape:
+                            part += c
+                            escape = False
+                        else:
+                            mode = "formatting"
+                            if len(part) > 0:
+                                output.append(make_part(state, part))
+                                part = ""
+                    else:
+                        part += c
+
+            if i == len(line)-1:
+                if len(part) > 0:
+                    output.append(make_part(state, part))
+
+    if len(output) > 0:
+        return output
+    else:
+        return None
+
+
+class LinkSpec(urwid.AttrSpec):
+    def __init__(self, link_target, orig_spec):
+        self.link_target = link_target
+
+        urwid.AttrSpec.__init__(self, orig_spec.foreground, orig_spec.background)
+
+
+class LinkableText(urwid.Text):
+    ignore_focus = False
+    _selectable = True
+
+    signals = ["click", "change"]
+
+    def __init__(self, text, align=None, cursor_position=0, delegate=None):
+        self.__super.__init__(text, align=align)
+        self.delegate = delegate
+        self._cursor_position = 0
+        self.key_timeout = 3
+        if self.delegate != None:
+            self.delegate.last_keypress = 0
+
+    def handle_link(self, link_target):
+        if self.delegate != None:
+            self.delegate.handle_link(link_target)
+
+
+    def find_next_part_pos(self, pos, part_positions):
+        for position in part_positions:
+            if position > pos:
+                return position
+        return pos
+
+    def find_prev_part_pos(self, pos, part_positions):
+        nextpos = pos
+        for position in part_positions:
+            if position < pos:
+                nextpos = position
+        return nextpos
+
+    def find_item_at_pos(self, pos):
+        total = 0
+        text, parts = self.get_text()
+        for i, info in enumerate(parts):
+            style, length = info
+            if total <= pos < length+total:
+                return style
+
+            total += length
+
+        return None
+
+    def peek_link(self):
+        item = self.find_item_at_pos(self._cursor_position)
+        if item != None:
+            if isinstance(item, LinkSpec):
+                if self.delegate != None:
+                    self.delegate.marked_link(item.link_target)
+            else:
+                if self.delegate != None:
+                    self.delegate.marked_link(None)
+
+
+    def keypress(self, size, key):
+        part_positions = [0]
+        parts = []
+        total = 0
+        text, parts = self.get_text()
+        for i, info in enumerate(parts):
+            style_name, length = info
+            part_positions.append(length+total)
+            total += length
+
+
+        if self.delegate != None:
+            self.delegate.last_keypress = time.time()
+            self._invalidate()
+            nomadnet.NomadNetworkApp.get_shared_instance().ui.loop.set_alarm_in(self.key_timeout, self.kt_event)
+
+        if self._command_map[key] == urwid.ACTIVATE:
+            item = self.find_item_at_pos(self._cursor_position)
+            if item != None:
+                if isinstance(item, LinkSpec):
+                    self.handle_link(item.link_target)
+
+        elif key == "up":
+            self._cursor_position = 0
+            return key
+        
+        elif key == "down":
+            self._cursor_position = 0
+            return key
+        
+        elif key == "right":
+            self._cursor_position = self.find_next_part_pos(self._cursor_position, part_positions)
+            self._invalidate()
+        
+        elif key == "left":
+            if self._cursor_position > 0:
+                self._cursor_position = self.find_prev_part_pos(self._cursor_position, part_positions)
+                self._invalidate()
+
+            else:
+                if self.delegate != None:
+                    self.delegate.micron_released_focus()
+
+        else:
+            return key
+
+    def kt_event(self, loop, user_data):
+        self._invalidate()
+
+    def render(self, size, focus=False):
+        now = time.time()
+        c = self.__super.render(size, focus)
+
+        if focus and (self.delegate == None or now < self.delegate.last_keypress+self.key_timeout):
+            c = urwid.CompositeCanvas(c)
+            c.cursor = self.get_cursor_coords(size)
+            if self.delegate != None:
+                self.peek_link()
+
+        return c
+
+    def get_cursor_coords(self, size):
+            if self._cursor_position > len(self.text):
+                return None
+
+            (maxcol,) = size
+            trans = self.get_line_translation(maxcol)
+            x, y = calc_coords(self.text, trans, self._cursor_position)
+            if maxcol <= x:
+                return None
+            return x, y
+
+    def mouse_event(self, size, event, button, x, y, focus):
+        if button != 1 or not is_mouse_press(event):
+            return False
+        else:
+            pos = (y * size[0]) + x
+            self._cursor_position = pos
+            item = self.find_item_at_pos(self._cursor_position)
+            if item != None:
+                if isinstance(item, LinkSpec):
+                    self.handle_link(item.link_target)
+
+            self._invalidate()
+            self._emit("change")
+            
+            return True

nomadnet/ui/textui/Network.py

@@ -1,15 +1,20 @@
 import RNS
 import urwid
 import nomadnet
+import time
 from datetime import datetime
 from nomadnet.Directory import DirectoryEntry
 from nomadnet.vendor.additional_urwid_widgets import IndicativeListBox, MODIFIER_KEY
 
+from .Browser import Browser
+
 class NetworkDisplayShortcuts():
     def __init__(self, app):
         self.app = app
+        g = app.ui.glyphs
 
-        self.widget = urwid.AttrMap(urwid.Text("Network Display Shortcuts"), "shortcutbar")
+        self.widget = urwid.AttrMap(urwid.Text("[C-l] Toggle Nodes/Announces view  [C-x] Remove entry  [C-w] Disconnect remote"), "shortcutbar")
+        #   "[C-"+g["arrow_u"]+g["arrow_d"]+"] Navigate Lists"
 
 
 class DialogLineBox(urwid.LineBox):
@@ -44,43 +49,185 @@ class ListEntry(urwid.Text):
         self._emit('click')
         return True
 
+
+class AnnounceInfo(urwid.WidgetWrap):
+    def __init__(self, announce, parent, app):
+        self.app = nomadnet.NomadNetworkApp.get_shared_instance()
+        self.parent = self.app.ui.main_display.sub_displays.network_display
+        g = self.app.ui.glyphs
+
+        source_hash  = announce[1]
+        time_format  = app.time_format
+        dt           = datetime.fromtimestamp(announce[0])
+        ts_string    = dt.strftime(time_format)
+        trust_level  = self.app.directory.trust_level(source_hash)
+        trust_str    = ""
+        display_str  = self.app.directory.simplest_display_str(source_hash)
+        addr_str     = "<"+RNS.hexrep(source_hash, delimit=False)+">"
+        is_node      = announce[3]
+
+        if is_node:
+            type_string = g["node"] + " Node"
+        else:
+            type_string = g["peer"] + " Peer"
+
+        try:
+            data_str = announce[2].decode("utf-8")
+            data_style = ""
+            if trust_level != DirectoryEntry.TRUSTED and len(data_str) > 32:
+                data_str = data_str[:32]+" [...]"
+        except Exception as e:
+            data_str = "Decode failed"
+            data_style = "list_untrusted"
+
+
+        if trust_level == DirectoryEntry.UNTRUSTED:
+            trust_str     = "Untrusted"
+            symbol        = g["cross"]
+            style         = "list_untrusted"
+        elif trust_level == DirectoryEntry.UNKNOWN:
+            trust_str     = "Unknown"
+            symbol        = g["unknown"]
+            style         = "list_unknown"
+        elif trust_level == DirectoryEntry.TRUSTED:
+            trust_str     = "Trusted"
+            symbol        = g["check"]
+            style         = "list_trusted"
+        elif trust_level == DirectoryEntry.WARNING:
+            trust_str     = "Warning"
+            symbol        = g["warning"]
+            style         = "list_warning"
+        else:
+            trust_str     = "Warning"
+            symbol        = g["warning"]
+            style         = "list_untrusted"
+
+        def show_announce_stream(sender):
+            options = self.parent.left_pile.options(height_type="weight", height_amount=1)
+            self.parent.left_pile.contents[0] = (self.parent.announce_stream_display, options)
+
+        def connect(sender):
+            self.parent.browser.retrieve_url(RNS.hexrep(source_hash, delimit=False))
+            show_announce_stream(None)
+
+        def converse(sender):
+            show_announce_stream(None)
+            try:
+                existing_conversations = nomadnet.Conversation.conversation_list(self.app)
+                
+                source_hash_text = RNS.hexrep(source_hash, delimit=False)
+                display_name = data_str
+
+                if not source_hash_text in [c[0] for c in existing_conversations]:
+                    entry = DirectoryEntry(source_hash, display_name, trust_level)
+                    self.app.directory.remember(entry)
+
+                    new_conversation = nomadnet.Conversation(source_hash_text, nomadnet.NomadNetworkApp.get_shared_instance(), initiator=True)
+                    self.app.ui.main_display.sub_displays.conversations_display.update_conversation_list()
+
+                self.app.ui.main_display.sub_displays.conversations_display.display_conversation(None, source_hash_text)
+                self.app.ui.main_display.show_conversations(None)
+
+            except Exception as e:
+                RNS.log("Error while starting conversation from announce. The contained exception was: "+str(e), RNS.LOG_ERROR)
+
+        if is_node:
+            type_button = ("weight", 0.45, urwid.Button("Connect", on_press=connect))
+        else:
+            type_button = ("weight", 0.45, urwid.Button("Converse", on_press=converse))
+
+        pile_widgets = [
+            urwid.Text("Time  : "+ts_string, align="left"),
+            urwid.Text("Addr  : "+addr_str, align="left"),
+            urwid.Text("Type  : "+type_string, align="left"),
+            urwid.Text("Name  : "+display_str, align="left"),
+            urwid.Text(["Trust : ", (style, trust_str)], align="left"),
+            urwid.Divider(g["divider1"]),
+            urwid.Text(["Announce Data: \n", (data_style, data_str)], align="left"),
+            urwid.Divider(g["divider1"]),
+            urwid.Columns([("weight", 0.45, urwid.Button("Back", on_press=show_announce_stream)), ("weight", 0.1, urwid.Text("")), type_button])
+        ]
+
+        if is_node:
+            node_ident = RNS.Identity.recall(source_hash)
+            op_hash = RNS.Destination.hash_from_name_and_identity("lxmf.delivery", node_ident)
+            op_str = self.app.directory.simplest_display_str(op_hash)
+            operator_entry = urwid.Text("Oprtr : "+op_str, align="left")
+            pile_widgets.insert(4, operator_entry)
+
+        pile = urwid.Pile(pile_widgets)
+
+        self.display_widget = urwid.Filler(pile, valign="top", height="pack")
+
+        urwid.WidgetWrap.__init__(self, urwid.LineBox(self.display_widget, title="Announce Info"))
+
+
 class AnnounceStreamEntry(urwid.WidgetWrap):
-    def __init__(self, app, timestamp, source_hash):
+    def __init__(self, app, announce):
+        full_time_format = "%Y-%m-%d %H:%M:%S"
+        date_time_format = "%Y-%m-%d"
+        time_time_format = "%H:%M:%S"
+        short_time_format = "%Y-%m-%d %H:%M"
+
+        timestamp = announce[0]
+        source_hash = announce[1]
+        is_node = announce[3]
         self.app = app
         self.timestamp = timestamp
         time_format = app.time_format
         dt = datetime.fromtimestamp(self.timestamp)
-        ts_string = dt.strftime(time_format)
+        dtn = datetime.fromtimestamp(time.time())
+        g = self.app.ui.glyphs
+
+        if dt.strftime(date_time_format) == dtn.strftime(date_time_format):
+            ts_string = dt.strftime(time_time_format)
+        else:
+            ts_string = dt.strftime(short_time_format)
 
         trust_level  = self.app.directory.trust_level(source_hash)
         display_str = self.app.directory.simplest_display_str(source_hash)
 
         if trust_level == DirectoryEntry.UNTRUSTED:
-            symbol        = "\u2715"
+            symbol        = g["cross"]
             style         = "list_untrusted"
             focus_style   = "list_focus_untrusted"
         elif trust_level == DirectoryEntry.UNKNOWN:
-            symbol        = "?"
+            symbol        = g["unknown"]
             style         = "list_unknown"
             focus_style   = "list_focus"
         elif trust_level == DirectoryEntry.TRUSTED:
-            symbol        = "\u2713"
+            symbol        = g["check"]
             style         = "list_trusted"
             focus_style   = "list_focus_trusted"
         elif trust_level == DirectoryEntry.WARNING:
-            symbol        = "\u26A0"
+            symbol        = g["warning"]
             style         = "list_warning"
             focus_style   = "list_focus"
         else:
-            symbol        = "\u26A0"
+            symbol        = g["warning"]
             style         = "list_untrusted"
             focus_style   = "list_focus_untrusted"
 
-        widget = ListEntry(ts_string+" "+display_str)
+        if is_node:
+            type_symbol = g["node"]
+        else:
+            type_symbol = g["peer"]
+
+        widget = ListEntry(ts_string+" "+type_symbol+" "+display_str)
+        urwid.connect_signal(widget, "click", self.display_announce, announce)
 
         self.display_widget = urwid.AttrMap(widget, style, focus_style)
         urwid.WidgetWrap.__init__(self, self.display_widget)
 
+    def display_announce(self, event, announce):
+        parent = self.app.ui.main_display.sub_displays.network_display
+        info_widget = AnnounceInfo(announce, parent, self.app)
+        options = parent.left_pile.options(height_type="weight", height_amount=1)
+        parent.left_pile.contents[0] = (info_widget, options)
+
+    def timestamp(self):
+        return self.timestamp
+
 class AnnounceStream(urwid.WidgetWrap):
     def __init__(self, app, parent):
         self.app = app
@@ -88,25 +235,38 @@ class AnnounceStream(urwid.WidgetWrap):
         self.started = False
         self.timeout = self.app.config["textui"]["animation_interval"]*2
         self.ilb = None
+        self.no_content = True
         
         self.added_entries = []
         self.widget_list = []
         self.update_widget_list()
 
-        wlt = [AnnounceStreamEntry(self.app, e[0], e[1]) for e in self.app.directory.announce_stream]
         self.ilb = IndicativeListBox(
             self.widget_list,
-            #wlt,
             on_selection_change=self.list_selection,
             initialization_is_selection_change=False,
-            modifier_key=MODIFIER_KEY.CTRL,
+            #modifier_key=MODIFIER_KEY.CTRL,
             #highlight_offFocus="list_off_focus"
         )
 
         self.display_widget = self.ilb
         urwid.WidgetWrap.__init__(self, urwid.LineBox(self.display_widget, title="Announce Stream"))
 
+    def keypress(self, size, key):
+        if key == "up" and (self.no_content or self.ilb.first_item_is_selected()):
+            nomadnet.NomadNetworkApp.get_shared_instance().ui.main_display.frame.set_focus("header")
+        elif key == "ctrl x":
+            self.delete_selected_entry()
+            
+        return super(AnnounceStream, self).keypress(size, key)
+
+    def delete_selected_entry(self):
+        if self.ilb.get_selected_item() != None:
+            self.app.directory.remove_announce_with_timestamp(self.ilb.get_selected_item().original_widget.timestamp)
+            self.rebuild_widget_list()
+
     def rebuild_widget_list(self):
+        self.no_content = True
         self.added_entries = []
         self.widget_list = []
         self.update_widget_list()
@@ -118,13 +278,22 @@ class AnnounceStream(urwid.WidgetWrap):
                 self.added_entries.insert(0, e[0])
                 new_entries.insert(0, e)
 
-        new_widgets = [AnnounceStreamEntry(self.app, e[0], e[1]) for e in new_entries]
+        for e in new_entries:
-        for nw in new_widgets:
+            nw = AnnounceStreamEntry(self.app, e)
+            nw.timestamp = e[0]
             self.widget_list.insert(0, nw)
 
-        if len(new_widgets) > 0:
+        if len(new_entries) > 0:
+            self.no_content = False
             if self.ilb != None:
                 self.ilb.set_body(self.widget_list)
+        else:
+            if len(self.widget_list) == 0:
+                self.no_content = True
+            
+            if self.ilb != None:
+                self.ilb.set_body(self.widget_list)
+
 
     def list_selection(self, arg1, arg2):
         pass
@@ -170,13 +339,23 @@ class SelectText(urwid.Text):
         self._emit('click')
         return True
 
+class ListDialogLineBox(urwid.LineBox):
+    def keypress(self, size, key):
+        if key == "esc":
+            self.delegate.close_list_dialogs()
+        else:
+            return super(ListDialogLineBox, self).keypress(size, key)
+
 class KnownNodes(urwid.WidgetWrap):
     def __init__(self, app):
         self.app = app
         self.node_list = app.directory.known_nodes()
+        g = self.app.ui.glyphs
+
+        self.widget_list = self.make_node_widgets()
         
         self.ilb = IndicativeListBox(
-            self.make_node_widgets(),
+            self.widget_list,
             on_selection_change=self.node_list_selection,
             initialization_is_selection_change=False,
             highlight_offFocus="list_off_focus"
@@ -189,13 +368,16 @@ class KnownNodes(urwid.WidgetWrap):
         else:
             self.no_content = True
             widget_style = "inactive_text"
-            self.display_widget = urwid.Pile([urwid.Text(("warning_text", "- i -\n"), align="center"), SelectText(("warning_text", "Currently, no nodes are known\n\n"), align="center")])
+            self.pile = urwid.Pile([urwid.Text(("warning_text", g["info"]+"\n"), align="center"), SelectText(("warning_text", "Currently, no nodes are known\n\n"), align="center")])
+            self.display_widget = urwid.Filler(self.pile, valign="top", height="pack")
 
         urwid.WidgetWrap.__init__(self, urwid.AttrMap(urwid.LineBox(self.display_widget, title="Known Nodes"), widget_style))
 
     def keypress(self, size, key):
-        if key == "up" and (self.no_content or self.ilb.top_is_visible):
+        if key == "up" and (self.no_content or self.ilb.first_item_is_selected()):
             nomadnet.NomadNetworkApp.get_shared_instance().ui.main_display.frame.set_focus("header")
+        elif key == "ctrl x":
+            self.delete_selected_entry()
             
         return super(KnownNodes, self).keypress(size, key)
 
@@ -203,16 +385,126 @@ class KnownNodes(urwid.WidgetWrap):
     def node_list_selection(self, arg1, arg2):
         pass
 
+    def connect_node(self, event, node):
+        source_hash = node.source_hash
+        trust_level = node.trust_level
+        trust_level  = self.app.directory.trust_level(source_hash)
+        display_str = self.app.directory.simplest_display_str(source_hash)
+
+        def dismiss_dialog(sender):
+            self.delegate.close_list_dialogs()
+
+        def confirmed(sender):
+            self.delegate.browser.retrieve_url(RNS.hexrep(source_hash, delimit=False))
+            self.delegate.close_list_dialogs()
+
+
+        dialog = ListDialogLineBox(
+            urwid.Pile([
+                urwid.Text("Connect to node\n"+self.app.directory.simplest_display_str(source_hash)+"\n", align="center"),
+                urwid.Columns([("weight", 0.45, urwid.Button("Yes", on_press=confirmed)), ("weight", 0.1, urwid.Text("")), ("weight", 0.45, urwid.Button("No", on_press=dismiss_dialog))])
+            ]), title="?"
+        )
+        dialog.delegate = self.delegate
+        bottom = self
+
+        overlay = urwid.Overlay(dialog, bottom, align="center", width=("relative", 100), valign="middle", height="pack", left=2, right=2)
+
+        options = self.delegate.left_pile.options("weight", 1)
+        self.delegate.left_pile.contents[0] = (overlay, options)
+
+    def delete_selected_entry(self):
+        source_hash = self.ilb.get_selected_item().original_widget.source_hash
+
+        def dismiss_dialog(sender):
+            self.delegate.close_list_dialogs()
+
+        def confirmed(sender):
+            self.app.directory.forget(source_hash)
+            self.rebuild_widget_list()
+            self.delegate.close_list_dialogs()
+
+
+        dialog = ListDialogLineBox(
+            urwid.Pile([
+                urwid.Text("Delete Node\n"+self.app.directory.simplest_display_str(source_hash)+"\n", align="center"),
+                urwid.Columns([("weight", 0.45, urwid.Button("Yes", on_press=confirmed)), ("weight", 0.1, urwid.Text("")), ("weight", 0.45, urwid.Button("No", on_press=dismiss_dialog))])
+            ]), title="?"
+        )
+        dialog.delegate = self.delegate
+        bottom = self
+
+        overlay = urwid.Overlay(dialog, bottom, align="center", width=("relative", 100), valign="middle", height="pack", left=2, right=2)
+
+        options = self.delegate.left_pile.options("weight", 1)
+        self.delegate.left_pile.contents[0] = (overlay, options)
+
+
+    def rebuild_widget_list(self):
+        self.node_list = self.app.directory.known_nodes()
+        self.widget_list = self.make_node_widgets()
+        self.ilb.set_body(self.widget_list)
+        if len(self.widget_list) > 0:
+            self.no_content = False
+        else:
+            self.no_content = True
+            self.delegate.reinit_known_nodes()
+
     def make_node_widgets(self):
         widget_list = []
         for node_entry in self.node_list:
             # TODO: Implement this
-            widget_list.append(ListEntry("Node "+RNS.prettyhexrep(node_entry.source_hash)))
+            ne = NodeEntry(self.app, node_entry, self)
+            ne.source_hash = node_entry.source_hash
+            widget_list.append(ne)
 
         # TODO: Sort list
         return widget_list
 
 
+
+class NodeEntry(urwid.WidgetWrap):
+    def __init__(self, app, node, delegate):
+        source_hash = node.source_hash
+        trust_level = node.trust_level
+
+        self.app = app
+        g = self.app.ui.glyphs
+
+        trust_level  = self.app.directory.trust_level(source_hash)
+        display_str = self.app.directory.simplest_display_str(source_hash)
+
+        if trust_level == DirectoryEntry.UNTRUSTED:
+            symbol        = g["cross"]
+            style         = "list_untrusted"
+            focus_style   = "list_focus_untrusted"
+        elif trust_level == DirectoryEntry.UNKNOWN:
+            symbol        = g["unknown"]
+            style         = "list_unknown"
+            focus_style   = "list_focus"
+        elif trust_level == DirectoryEntry.TRUSTED:
+            symbol        = g["check"]
+            style         = "list_trusted"
+            focus_style   = "list_focus_trusted"
+        elif trust_level == DirectoryEntry.WARNING:
+            symbol        = g["warning"]
+            style         = "list_warning"
+            focus_style   = "list_focus"
+        else:
+            symbol        = g["warning"]
+            style         = "list_untrusted"
+            focus_style   = "list_focus_untrusted"
+
+        type_symbol = g["node"]
+        
+        widget = ListEntry(type_symbol+" "+display_str)
+        urwid.connect_signal(widget, "click", delegate.connect_node, node)
+
+        self.display_widget = urwid.AttrMap(widget, style, focus_style)
+        self.display_widget.source_hash = source_hash
+        urwid.WidgetWrap.__init__(self, self.display_widget)
+
+
 class AnnounceTime(urwid.WidgetWrap):
     def __init__(self, app):
         self.started = False
@@ -251,6 +543,7 @@ class LocalPeer(urwid.WidgetWrap):
     def __init__(self, app, parent):
         self.app = app
         self.parent = parent
+        g = self.app.ui.glyphs
         self.dialog_open = False
         display_name = self.app.lxmf_destination.display_name
         if display_name == None:
@@ -262,7 +555,7 @@ class LocalPeer(urwid.WidgetWrap):
         def save_query(sender):
             def dismiss_dialog(sender):
                 self.dialog_open = False
-                self.parent.left_pile.contents[3] = (LocalPeer(self.app, self.parent), options)
+                self.parent.left_pile.contents[2] = (LocalPeer(self.app, self.parent), options)
 
             self.app.set_display_name(e_name.get_edit_text())
 
@@ -270,7 +563,7 @@ class LocalPeer(urwid.WidgetWrap):
                 urwid.Pile([
                     urwid.Text("\n\n\nSaved\n\n", align="center"),
                     urwid.Button("OK", on_press=dismiss_dialog)
-                ]), title="i"
+                ]), title=g["info"]
             )
             dialog.delegate = self
             bottom = self
@@ -279,13 +572,13 @@ class LocalPeer(urwid.WidgetWrap):
             overlay = dialog
             options = self.parent.left_pile.options(height_type="pack", height_amount=None)
             self.dialog_open = True
-            self.parent.left_pile.contents[3] = (overlay, options)
+            self.parent.left_pile.contents[2] = (overlay, options)
 
         def announce_query(sender):
             def dismiss_dialog(sender):
                 self.dialog_open = False
                 options = self.parent.left_pile.options(height_type="pack", height_amount=None)
-                self.parent.left_pile.contents[3] = (LocalPeer(self.app, self.parent), options)
+                self.parent.left_pile.contents[2] = (LocalPeer(self.app, self.parent), options)
 
             self.app.announce_now()
 
@@ -293,7 +586,7 @@ class LocalPeer(urwid.WidgetWrap):
                 urwid.Pile([
                     urwid.Text("\n\n\nAnnounce Sent\n\n", align="center"),
                     urwid.Button("OK", on_press=dismiss_dialog)
-                ]), title="i"
+                ]), title=g["info"]
             )
             dialog.delegate = self
             bottom = self
@@ -303,11 +596,11 @@ class LocalPeer(urwid.WidgetWrap):
             
             self.dialog_open = True
             options = self.parent.left_pile.options(height_type="pack", height_amount=None)
-            self.parent.left_pile.contents[3] = (overlay, options)
+            self.parent.left_pile.contents[2] = (overlay, options)
 
         def node_settings_query(sender):
             options = self.parent.left_pile.options(height_type="pack", height_amount=None)
-            self.parent.left_pile.contents[3] = (self.parent.node_settings_display, options)
+            self.parent.left_pile.contents[2] = (self.parent.node_settings_display, options)
 
         if LocalPeer.announce_timer == None:
             self.t_last_announce = AnnounceTime(self.app)
@@ -322,10 +615,10 @@ class LocalPeer(urwid.WidgetWrap):
             [
                 t_id,
                 e_name,
-                urwid.Divider("\u2504"),
+                urwid.Divider(g["divider1"]),
                 self.t_last_announce,
                 announce_button,
-                urwid.Divider("\u2504"),
+                urwid.Divider(g["divider1"]),
                 urwid.Columns([("weight", 0.45, urwid.Button("Save", on_press=save_query)), ("weight", 0.1, urwid.Text("")), ("weight", 0.45, urwid.Button("Node Cfg", on_press=node_settings_query))])
             ]
         )
@@ -340,14 +633,15 @@ class NodeSettings(urwid.WidgetWrap):
     def __init__(self, app, parent):
         self.app = app
         self.parent = parent
+        g = self.app.ui.glyphs
 
         def show_peer_info(sender):
             options = self.parent.left_pile.options(height_type="pack", height_amount=None)
-            self.parent.left_pile.contents[3] = (LocalPeer(self.app, self.parent), options)
+            self.parent.left_pile.contents[2] = (LocalPeer(self.app, self.parent), options)
 
         widget_style = "inactive_text"
         pile = urwid.Pile([
-            urwid.Text("- i -\n", align="center"),
+            urwid.Text("\n"+g["info"], align="center"),
             urwid.Text("\nNode Hosting currently unavailable\n\n", align="center"),
             urwid.Padding(urwid.Button("Back", on_press=show_peer_info), "center", "pack")
         ])
@@ -356,17 +650,6 @@ class NodeSettings(urwid.WidgetWrap):
 
         urwid.WidgetWrap.__init__(self, urwid.AttrMap(urwid.LineBox(self.display_widget, title="Node Settings"), widget_style))
 
-    def node_list_selection(self, arg1, arg2):
-        pass
-
-    def make_node_widgets(self):
-        widget_list = []
-        for node_entry in self.node_list:
-            # TODO: Implement this
-            widget_list.append(ListEntry("Node "+RNS.prettyhexrep(node_entry.source_hash)))
-
-        # TODO: Sort list
-        return widget_list
 
 
 class UpdatingText(urwid.WidgetWrap):
@@ -429,11 +712,26 @@ class NetworkStats(urwid.WidgetWrap):
         self.w_heard_peers.start()
         self.w_known_nodes.start()
 
+
+
+class NetworkLeftPile(urwid.Pile):
+    def keypress(self, size, key):
+        if key == "ctrl l":
+            self.parent.toggle_list()
+        elif key == "ctrl w":
+            self.parent.browser.disconnect()
+        else:
+            return super(NetworkLeftPile, self).keypress(size, key)
+
+
 class NetworkDisplay():
     list_width = 0.33
 
     def __init__(self, app):
         self.app = app
+        g = self.app.ui.glyphs
+
+        self.browser = Browser(self.app, "nomadnetwork", "node", auth_identity = self.app.identity, delegate = self)
 
         self.known_nodes_display = KnownNodes(self.app)
         self.network_stats_display = NetworkStats(self.app, self)
@@ -441,15 +739,19 @@ class NetworkDisplay():
         self.local_peer_display = LocalPeer(self.app, self)
         self.node_settings_display = NodeSettings(self.app, self)
 
-        self.left_pile = urwid.Pile([
+        self.known_nodes_display.delegate = self
-            ("pack", self.known_nodes_display),
+
-            ("weight", 1, self.announce_stream_display),
+        self.list_display = 1
+        self.left_pile = NetworkLeftPile([
+            ("weight", 1, self.known_nodes_display),
             ("pack", self.network_stats_display),
             ("pack", self.local_peer_display),
         ])
 
+        self.left_pile.parent = self
+
         self.left_area = self.left_pile
-        self.right_area = urwid.AttrMap(urwid.LineBox(urwid.Filler(urwid.Text("Disconnected\n\u2190  \u2192", align="center"), "middle"), title="Remote Node"), "inactive_text")
+        self.right_area = self.browser.display_widget
 
         self.columns = urwid.Columns(
             [
@@ -462,6 +764,33 @@ class NetworkDisplay():
         self.shortcuts_display = NetworkDisplayShortcuts(self.app)
         self.widget = self.columns
 
+    def toggle_list(self):
+        if self.list_display != 0:
+            options = self.left_pile.options(height_type="weight", height_amount=1)
+            self.left_pile.contents[0] = (self.announce_stream_display, options)
+            self.list_display = 0
+        else:
+            options = self.left_pile.options(height_type="weight", height_amount=1)
+            self.left_pile.contents[0] = (self.known_nodes_display, options)
+            self.list_display = 1
+
+    def focus_lists(self):
+        self.columns.focus_position = 0
+
+    def reinit_known_nodes(self):
+        self.known_nodes_display = KnownNodes(self.app)
+        self.known_nodes_display.delegate = self
+        self.close_list_dialogs()
+        self.announce_stream_display.rebuild_widget_list()
+
+    def close_list_dialogs(self):
+        if self.list_display == 0:
+            options = self.left_pile.options(height_type="weight", height_amount=1)
+            self.left_pile.contents[0] = (self.announce_stream_display, options)
+        else:
+            options = self.left_pile.options(height_type="weight", height_amount=1)
+            self.left_pile.contents[0] = (self.known_nodes_display, options)
+
     def start(self):
         self.local_peer_display.start()
         self.network_stats_display.start()
@@ -472,6 +801,10 @@ class NetworkDisplay():
 
     def directory_change_callback(self):
         self.announce_stream_display.rebuild_widget_list()
+        if self.known_nodes_display.no_content:
+            self.reinit_known_nodes()
+        else:
+            self.known_nodes_display.rebuild_widget_list()
 
 
 

nomadnet/vendor/Scrollable.py

@@ -0,0 +1,425 @@
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details
+# http://www.gnu.org/licenses/gpl-3.0.txt
+
+import urwid
+from urwid.widget import BOX, FIXED, FLOW
+
+# Scroll actions
+SCROLL_LINE_UP        = 'line up'
+SCROLL_LINE_DOWN      = 'line down'
+SCROLL_PAGE_UP        = 'page up'
+SCROLL_PAGE_DOWN      = 'page down'
+SCROLL_TO_TOP         = 'to top'
+SCROLL_TO_END         = 'to end'
+
+# Scrollbar positions
+SCROLLBAR_LEFT  = 'left'
+SCROLLBAR_RIGHT = 'right'
+
+class Scrollable(urwid.WidgetDecoration):
+    def sizing(self):
+        return frozenset([BOX,])
+
+    def selectable(self):
+        return True
+
+    def __init__(self, widget, force_forward_keypress = False):
+        """Box widget that makes a fixed or flow widget vertically scrollable
+
+        TODO: Focusable widgets are handled, including switching focus, but
+        possibly not intuitively, depending on the arrangement of widgets.  When
+        switching focus to a widget that is ouside of the visible part of the
+        original widget, the canvas scrolls up/down to the focused widget.  It
+        would be better to scroll until the next focusable widget is in sight
+        first.  But for that to work we must somehow obtain a list of focusable
+        rows in the original canvas.
+        """
+        if not any(s in widget.sizing() for s in (FIXED, FLOW)):
+            raise ValueError('Not a fixed or flow widget: %r' % widget)
+        self._trim_top = 0
+        self._scroll_action = None
+        self._forward_keypress = None
+        self._old_cursor_coords = None
+        self._rows_max_cached = 0
+        self.force_forward_keypress = force_forward_keypress
+        self.__super.__init__(widget)
+
+    def render(self, size, focus=False):
+        maxcol, maxrow = size
+
+        # Render complete original widget
+        ow = self._original_widget
+        ow_size = self._get_original_widget_size(size)
+        canv_full = ow.render(ow_size, focus)
+
+        # Make full canvas editable
+        canv = urwid.CompositeCanvas(canv_full)
+        canv_cols, canv_rows = canv.cols(), canv.rows()
+
+        if canv_cols <= maxcol:
+            pad_width = maxcol - canv_cols
+            if pad_width > 0:
+                # Canvas is narrower than available horizontal space
+                canv.pad_trim_left_right(0, pad_width)
+
+        if canv_rows <= maxrow:
+            fill_height = maxrow - canv_rows
+            if fill_height > 0:
+                # Canvas is lower than available vertical space
+                canv.pad_trim_top_bottom(0, fill_height)
+
+        if canv_cols <= maxcol and canv_rows <= maxrow:
+            # Canvas is small enough to fit without trimming
+            return canv
+
+        self._adjust_trim_top(canv, size)
+
+        # Trim canvas if necessary
+        trim_top = self._trim_top
+        trim_end = canv_rows - maxrow - trim_top
+        trim_right = canv_cols - maxcol
+        if trim_top > 0:
+            canv.trim(trim_top)
+        if trim_end > 0:
+            canv.trim_end(trim_end)
+        if trim_right > 0:
+            canv.pad_trim_left_right(0, -trim_right)
+
+        # Disable cursor display if cursor is outside of visible canvas parts
+        if canv.cursor is not None:
+            curscol, cursrow = canv.cursor
+            if cursrow >= maxrow or cursrow < 0:
+                canv.cursor = None
+
+        # Figure out whether we should forward keypresses to original widget
+        if canv.cursor is not None:
+            # Trimmed canvas contains the cursor, e.g. in an Edit widget
+            self._forward_keypress = True
+        else:
+            if canv_full.cursor is not None:
+                # Full canvas contains the cursor, but scrolled out of view
+                self._forward_keypress = False
+            else:
+                # Original widget does not have a cursor, but may be selectable
+
+                # FIXME: Using ow.selectable() is bad because the original
+                # widget may be selectable because it's a container widget with
+                # a key-grabbing widget that is scrolled out of view.
+                # ow.selectable() returns True anyway because it doesn't know
+                # how we trimmed our canvas.
+                #
+                # To fix this, we need to resolve ow.focus and somehow
+                # ask canv whether it contains bits of the focused widget.  I
+                # can't see a way to do that.
+                if ow.selectable():
+                    self._forward_keypress = True
+                else:
+                    self._forward_keypress = False
+
+        return canv
+
+    def keypress(self, size, key):
+        # Maybe offer key to original widget
+        if self._forward_keypress or self.force_forward_keypress:
+            ow = self._original_widget
+            ow_size = self._get_original_widget_size(size)
+
+            # Remember previous cursor position if possible
+            if hasattr(ow, 'get_cursor_coords'):
+                self._old_cursor_coords = ow.get_cursor_coords(ow_size)
+
+            key = ow.keypress(ow_size, key)
+            if key is None:
+                return None
+
+        # Handle up/down, page up/down, etc
+        command_map = self._command_map
+        if command_map[key] == urwid.CURSOR_UP:
+            self._scroll_action = SCROLL_LINE_UP
+        elif command_map[key] == urwid.CURSOR_DOWN:
+            self._scroll_action = SCROLL_LINE_DOWN
+
+        elif command_map[key] == urwid.CURSOR_PAGE_UP:
+            self._scroll_action = SCROLL_PAGE_UP
+        elif command_map[key] == urwid.CURSOR_PAGE_DOWN:
+            self._scroll_action = SCROLL_PAGE_DOWN
+
+        elif command_map[key] == urwid.CURSOR_MAX_LEFT:   # 'home'
+            self._scroll_action = SCROLL_TO_TOP
+        elif command_map[key] == urwid.CURSOR_MAX_RIGHT:  # 'end'
+            self._scroll_action = SCROLL_TO_END
+
+        else:
+            return key
+
+        self._invalidate()
+
+    def mouse_event(self, size, event, button, col, row, focus):
+        ow = self._original_widget
+        if hasattr(ow, 'mouse_event'):
+            ow_size = self._get_original_widget_size(size)
+            row += self._trim_top
+            return ow.mouse_event(ow_size, event, button, col, row, focus)
+        else:
+            return False
+
+    def _adjust_trim_top(self, canv, size):
+        """Adjust self._trim_top according to self._scroll_action"""
+        action = self._scroll_action
+        self._scroll_action = None
+
+        maxcol, maxrow = size
+        trim_top = self._trim_top
+        canv_rows = canv.rows()
+
+        if trim_top < 0:
+            # Negative trim_top values use bottom of canvas as reference
+            trim_top = canv_rows - maxrow + trim_top + 1
+
+        if canv_rows <= maxrow:
+            self._trim_top = 0  # Reset scroll position
+            return
+
+        def ensure_bounds(new_trim_top):
+            return max(0, min(canv_rows - maxrow, new_trim_top))
+
+        if action == SCROLL_LINE_UP:
+            self._trim_top = ensure_bounds(trim_top - 1)
+        elif action == SCROLL_LINE_DOWN:
+            self._trim_top = ensure_bounds(trim_top + 1)
+
+        elif action == SCROLL_PAGE_UP:
+            self._trim_top = ensure_bounds(trim_top - maxrow + 1)
+        elif action == SCROLL_PAGE_DOWN:
+            self._trim_top = ensure_bounds(trim_top + maxrow - 1)
+
+        elif action == SCROLL_TO_TOP:
+            self._trim_top = 0
+        elif action == SCROLL_TO_END:
+            self._trim_top = canv_rows - maxrow
+
+        else:
+            self._trim_top = ensure_bounds(trim_top)
+
+        # If the cursor was moved by the most recent keypress, adjust trim_top
+        # so that the new cursor position is within the displayed canvas part.
+        # But don't do this if the cursor is at the top/bottom edge so we can still scroll out
+        if self._old_cursor_coords is not None and self._old_cursor_coords != canv.cursor and canv.cursor != None:
+            self._old_cursor_coords = None
+            curscol, cursrow = canv.cursor
+            if cursrow < self._trim_top:
+                self._trim_top = cursrow
+            elif cursrow >= self._trim_top + maxrow:
+                self._trim_top = max(0, cursrow - maxrow + 1)
+
+    def _get_original_widget_size(self, size):
+        ow = self._original_widget
+        sizing = ow.sizing()
+        if FIXED in sizing:
+            return ()
+        elif FLOW in sizing:
+            return (size[0],)
+
+    def get_scrollpos(self, size=None, focus=False):
+        """Current scrolling position
+
+        Lower limit is 0, upper limit is the maximum number of rows with the
+        given maxcol minus maxrow.
+
+        NOTE: The returned value may be too low or too high if the position has
+        changed but the widget wasn't rendered yet.
+        """
+        return self._trim_top
+
+    def set_scrollpos(self, position):
+        """Set scrolling position
+
+        If `position` is positive it is interpreted as lines from the top.
+        If `position` is negative it is interpreted as lines from the bottom.
+
+        Values that are too high or too low values are automatically adjusted
+        during rendering.
+        """
+        self._trim_top = int(position)
+        self._invalidate()
+
+    def rows_max(self, size=None, focus=False):
+        """Return the number of rows for `size`
+
+        If `size` is not given, the currently rendered number of rows is returned.
+        """
+        if size is not None:
+            ow = self._original_widget
+            ow_size = self._get_original_widget_size(size)
+            sizing = ow.sizing()
+            if FIXED in sizing:
+                self._rows_max_cached = ow.pack(ow_size, focus)[1]
+            elif FLOW in sizing:
+                self._rows_max_cached = ow.rows(ow_size, focus)
+            else:
+                raise RuntimeError('Not a flow/box widget: %r' % self._original_widget)
+        return self._rows_max_cached
+
+
+class ScrollBar(urwid.WidgetDecoration):
+    def sizing(self):
+        return frozenset((BOX,))
+
+    def selectable(self):
+        return True
+
+    def __init__(self, widget, thumb_char=u'\u2588', trough_char=' ',
+                 side=SCROLLBAR_RIGHT, width=1):
+        """Box widget that adds a scrollbar to `widget`
+
+        `widget` must be a box widget with the following methods:
+          - `get_scrollpos` takes the arguments `size` and `focus` and returns
+            the index of the first visible row.
+          - `set_scrollpos` (optional; needed for mouse click support) takes the
+            index of the first visible row.
+          - `rows_max` takes `size` and `focus` and returns the total number of
+            rows `widget` can render.
+
+        `thumb_char` is the character used for the scrollbar handle.
+        `trough_char` is used for the space above and below the handle.
+        `side` must be 'left' or 'right'.
+        `width` specifies the number of columns the scrollbar uses.
+        """
+        if BOX not in widget.sizing():
+            raise ValueError('Not a box widget: %r' % widget)
+        self.__super.__init__(widget)
+        self._thumb_char = thumb_char
+        self._trough_char = trough_char
+        self.scrollbar_side = side
+        self.scrollbar_width = max(1, width)
+        self._original_widget_size = (0, 0)
+
+    def render(self, size, focus=False):
+        maxcol, maxrow = size
+
+        sb_width = self._scrollbar_width
+        ow_size = (max(0, maxcol - sb_width), maxrow)
+        sb_width = maxcol - ow_size[0]
+
+        ow = self._original_widget
+        ow_base = self.scrolling_base_widget
+        ow_rows_max = ow_base.rows_max(size, focus)
+        if ow_rows_max <= maxrow:
+            # Canvas fits without scrolling - no scrollbar needed
+            self._original_widget_size = size
+            return ow.render(size, focus)
+        ow_rows_max = ow_base.rows_max(ow_size, focus)
+
+        ow_canv = ow.render(ow_size, focus)
+        self._original_widget_size = ow_size
+
+        pos = ow_base.get_scrollpos(ow_size, focus)
+        posmax = ow_rows_max - maxrow
+
+        # Thumb shrinks/grows according to the ratio of
+        # <number of visible lines> / <number of total lines>
+        thumb_weight = min(1, maxrow / max(1, ow_rows_max))
+        thumb_height = max(1, round(thumb_weight * maxrow))
+
+        # Thumb may only touch top/bottom if the first/last row is visible
+        top_weight = float(pos) / max(1, posmax)
+        top_height = int((maxrow - thumb_height) * top_weight)
+        if top_height == 0 and top_weight > 0:
+            top_height = 1
+
+        # Bottom part is remaining space
+        bottom_height = maxrow - thumb_height - top_height
+        assert thumb_height + top_height + bottom_height == maxrow
+
+        # Create scrollbar canvas
+        # Creating SolidCanvases of correct height may result in "cviews do not
+        # fill gaps in shard_tail!" or "cviews overflow gaps in shard_tail!"
+        # exceptions. Stacking the same SolidCanvas is a workaround.
+        # https://github.com/urwid/urwid/issues/226#issuecomment-437176837
+        top = urwid.SolidCanvas(self._trough_char, sb_width, 1)
+        thumb = urwid.SolidCanvas(self._thumb_char, sb_width, 1)
+        bottom = urwid.SolidCanvas(self._trough_char, sb_width, 1)
+        sb_canv = urwid.CanvasCombine(
+            [(top, None, False)] * top_height +
+            [(thumb, None, False)] * thumb_height +
+            [(bottom, None, False)] * bottom_height,
+        )
+
+        combinelist = [(ow_canv, None, True, ow_size[0]),
+                       (sb_canv, None, False, sb_width)]
+        if self._scrollbar_side != SCROLLBAR_LEFT:
+            return urwid.CanvasJoin(combinelist)
+        else:
+            return urwid.CanvasJoin(reversed(combinelist))
+
+    @property
+    def scrollbar_width(self):
+        """Columns the scrollbar uses"""
+        return max(1, self._scrollbar_width)
+
+    @scrollbar_width.setter
+    def scrollbar_width(self, width):
+        self._scrollbar_width = max(1, int(width))
+        self._invalidate()
+
+    @property
+    def scrollbar_side(self):
+        """Where to display the scrollbar; must be 'left' or 'right'"""
+        return self._scrollbar_side
+
+    @scrollbar_side.setter
+    def scrollbar_side(self, side):
+        if side not in (SCROLLBAR_LEFT, SCROLLBAR_RIGHT):
+            raise ValueError('scrollbar_side must be "left" or "right", not %r' % side)
+        self._scrollbar_side = side
+        self._invalidate()
+
+    @property
+    def scrolling_base_widget(self):
+        """Nearest `original_widget` that is compatible with the scrolling API"""
+        def orig_iter(w):
+            while hasattr(w, 'original_widget'):
+                w = w.original_widget
+                yield w
+            yield w
+
+        def is_scrolling_widget(w):
+            return hasattr(w, 'get_scrollpos') and hasattr(w, 'rows_max')
+
+        for w in orig_iter(self):
+            if is_scrolling_widget(w):
+                return w
+        raise ValueError('Not compatible to be wrapped by ScrollBar: %r' % w)
+
+    def keypress(self, size, key):
+        return self._original_widget.keypress(self._original_widget_size, key)
+
+    def mouse_event(self, size, event, button, col, row, focus):
+        ow = self._original_widget
+        ow_size = self._original_widget_size
+        handled = False
+        if hasattr(ow, 'mouse_event'):
+            handled = ow.mouse_event(ow_size, event, button, col, row, focus)
+
+        if not handled and hasattr(ow, 'set_scrollpos'):
+            if button == 4:    # scroll wheel up
+                pos = ow.get_scrollpos(ow_size)
+                newpos = pos - 1
+                if newpos < 0:
+                    newpos = 0
+                ow.set_scrollpos(newpos)
+                return True
+            elif button == 5:  # scroll wheel down
+                pos = ow.get_scrollpos(ow_size)
+                ow.set_scrollpos(pos + 1)
+                return True
+
+        return False

setup.py

@@ -23,6 +23,6 @@ setuptools.setup(
     entry_points= {
         'console_scripts': ['nomadnet=nomadnet.nomadnet:main']
     },
-    install_requires=['rns>=0.2.0', 'lxmf>=0.0.3', 'urwid>=2.1.2'],
+    install_requires=['rns>=0.2.4', 'lxmf>=0.0.9', 'urwid>=2.1.2'],
-    python_requires='>=3.5',
+    python_requires='>=3.6',
 )