From 5465704f0edabdd020b00dc2e0b6ef805f38f13c Mon Sep 17 00:00:00 2001
From: ac79b0c6 <105047743+ac79b0c6@users.noreply.github.com>
Date: Thu, 21 Jul 2022 12:10:53 +0800
Subject: update mkvlib:add font subset restore.

---
 mkvlib/ass.go    | 17 +++++++++++++++++
 mkvlib/shared.go |  2 +-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/mkvlib/ass.go b/mkvlib/ass.go
index 27a348f..80bd742 100644
--- a/mkvlib/ass.go
+++ b/mkvlib/ass.go
@@ -88,6 +88,22 @@ func (self *assProcessor) getLength(p string) time.Duration {
 	return 0
 }
 
+func restoreSubsetted(str string) string {
+	reg := regexp.MustCompile(`; Font subset: (\w+) - ([\S ]+)`)
+	for _, v := range reg.FindAllStringSubmatch(str, -1) {
+		if len(v) > 2 {
+			_reg, _ := regexp.Compile(fmt.Sprintf(`(Style:[^,\r\n]+,|\\fn)(@?)%s([,\\\}])`, v[1]))
+			if _reg.MatchString(str) {
+				r := fmt.Sprintf("${1}${2}%s${3}", v[2])
+				str = _reg.ReplaceAllString(str, r)
+				str = reg.ReplaceAllString(str, "; ♻ Font subset: ${1} - ${2}")
+				printLog(nil, logWarning, `Font subset restore: "%s" -> "%s".`, v[1], v[2])
+			}
+		}
+	}
+	return str
+}
+
 func (self *assProcessor) parse() bool {
 	ec := 0
 	self.seps = []string{"-", " "}
@@ -100,6 +116,7 @@ func (self *assProcessor) parse() bool {
 			data, err := io.ReadAll(f)
 			if err == nil {
 				str := toUTF8(data)
+				str = restoreSubsetted(str)
 				self.subtitles[file] = str
 			} else {
 				ec++
diff --git a/mkvlib/shared.go b/mkvlib/shared.go
index 5737c0d..7c6ef5e 100644
--- a/mkvlib/shared.go
+++ b/mkvlib/shared.go
@@ -12,7 +12,7 @@ import (
 )
 
 const libName = "mkvlib"
-const libVer = "v2.1.7"
+const libVer = "v2.1.8"
 
 const LibFName = libName + " " + libVer
 
-- 
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