From a500e7bb7977d99c47bfe4c4e6b4cd66c485ee67 Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Wed, 27 Dec 2023 20:57:40 -0300
Subject: [PATCH] add cyrillic and make latin/unknown be just the fallback, not
 compete against other scripts in the identification race.

---
 image_utils.go | 29 +++++++++++++++++------------
 samples.txt    |  1 +
 utils.go       |  2 +-
 3 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/image_utils.go b/image_utils.go
index c9ed699..0667b29 100644
--- a/image_utils.go
+++ b/image_utils.go
@@ -27,7 +27,7 @@ import (
 )
 
 const (
-	nSupportedScripts = 13
+	nSupportedScripts = 14
 	scaleShift        = 6
 )
 
@@ -35,6 +35,7 @@ var (
 	supportedScripts = [nSupportedScripts]language.Script{
 		language.Unknown,
 		language.Latin,
+		language.Cyrillic,
 		language.Hiragana,
 		language.Katakana,
 		language.Hebrew,
@@ -56,6 +57,7 @@ var (
 	defaultLanguageMap = [nSupportedScripts]language.Language{
 		"en-us",
 		"en-us",
+		"ru",
 		"ja",
 		"ja",
 		"he",
@@ -74,6 +76,7 @@ var (
 		di.DirectionLTR,
 		di.DirectionLTR,
 		di.DirectionLTR,
+		di.DirectionLTR,
 		di.DirectionRTL,
 		di.DirectionLTR,
 		di.DirectionRTL,
@@ -139,16 +142,17 @@ func initializeImageDrawingStuff() error {
 	}
 	fontMap[0] = loadFont("fonts/NotoSans.ttf")
 	fontMap[1] = fontMap[0]
-	fontMap[2] = loadFont("fonts/NotoSansJP.ttf")
-	fontMap[3] = fontMap[1]
-	fontMap[4] = loadFont("fonts/NotoSansHebrew.ttf")
-	fontMap[5] = loadFont("fonts/NotoSansThai.ttf")
-	fontMap[6] = loadFont("fonts/NotoSansArabic.ttf")
-	fontMap[7] = loadFont("fonts/NotoSansDevanagari.ttf")
-	fontMap[8] = loadFont("fonts/NotoSansBengali.ttf")
-	fontMap[9] = loadFont("fonts/NotoSansJavanese.ttf")
-	fontMap[10] = loadFont("fonts/NotoSansSC.ttf")
-	fontMap[11] = loadFont("fonts/NotoSansKR.ttf")
+	fontMap[2] = fontMap[0]
+	fontMap[3] = loadFont("fonts/NotoSansJP.ttf")
+	fontMap[4] = fontMap[3]
+	fontMap[5] = loadFont("fonts/NotoSansHebrew.ttf")
+	fontMap[6] = loadFont("fonts/NotoSansThai.ttf")
+	fontMap[7] = loadFont("fonts/NotoSansArabic.ttf")
+	fontMap[8] = loadFont("fonts/NotoSansDevanagari.ttf")
+	fontMap[9] = loadFont("fonts/NotoSansBengali.ttf")
+	fontMap[10] = loadFont("fonts/NotoSansJavanese.ttf")
+	fontMap[11] = loadFont("fonts/NotoSansSC.ttf")
+	fontMap[12] = loadFont("fonts/NotoSansKR.ttf")
 	emojiFace = loadFont("fonts/NotoEmoji.ttf")
 
 	// shaper stuff
@@ -228,7 +232,8 @@ func getLanguageAndScriptAndDirectionAndFont(paragraph []rune) (
 			goto gotScriptIndex
 		}
 	}
-	idx = maxIndex(ranking[:])
+	idx = maxIndex(ranking[2:] /* skip Unknown and Latin because they are the default */)
+	idx += 2 // add back the skipped indexes (if maxIndex returns -1 this will default us to 1, latin)
 
 gotScriptIndex:
 	script = supportedScripts[idx]
diff --git a/samples.txt b/samples.txt
index 1904468..68ef61b 100644
--- a/samples.txt
+++ b/samples.txt
@@ -10,3 +10,4 @@ naddr1qqwyummnw3ez64r9vd5z64m9v44kc7fdxgcryvedxycj6vfeqgszak7w562dzerznp222fvrgk
 nevent1qqsy05v33j3w6klkfhy6taud0d7g7n6e7z9mt0z20aenqfam3lzywrcpzpmhxue69uhnzdps9enrw73wd9hsyg9vxs9ql7jgtz0f3tu9wa65220gck0hl5gs7x7gxtgw34xy60gc2vg30mg0
 nevent1qqszl72lntw6qdx2dc0fet9yrjpxlvh98ww7w3egm5ey5h0dwwzjg2gpzpmhxue69uhnzdps9enrw73wd9hsygyxl5wgpsraaw7r6xffxaajf49lvk594ung4u2umg4veez5manshc4w8pdp
 nevent1qqsyxahlr82z786vyhg0u2ycx46wrwwz5tap66udeffxle7phduthmspzpmhxue69uhnzdps9enrw73wd9hsygpcrk7vwyuw4wd8r6q5c4ur0jwky06qxmkqys80xq3nq6z0lj9n3u9zd3r4
+nevent1qqstj4gq2q9utuazaagzx0cd0n3jlm97p2084rfrvw2f8ytfa8ec2qgpp4mhxue69uhhjctzw5hx6egzypmezxyxju0727078e8epkwu06gle46g2rwzs5mgrll3we2tyxqfzuwew5q
diff --git a/utils.go b/utils.go
index 08270e5..00c3c21 100644
--- a/utils.go
+++ b/utils.go
@@ -506,7 +506,7 @@ func isntRealRelay(url string) bool {
 }
 
 func maxIndex(slice []int) int {
-	maxIndex := 0
+	maxIndex := -1
 	maxVal := 0
 	for i, val := range slice {
 		if val > maxVal {