From f7ffb60ac957df7b6295da3d1327f4526b46f364 Mon Sep 17 00:00:00 2001
From: maboroshin <unknown>
Date: Thu, 20 Sep 2018 10:19:58 +1000
Subject: Backport: Fix highlighting of non-ASCII characters in links.

Backport of changeset 7092:a55c26c645f8.
---
 doc/ScintillaHistory.html |  5 ++++
 lexers/LexMarkdown.cxx    | 60 +++++++++++++++++++++++------------------------
 2 files changed, 35 insertions(+), 30 deletions(-)

diff --git a/doc/ScintillaHistory.html b/doc/ScintillaHistory.html
index 9f94a1744..0a50bfd6a 100644
--- a/doc/ScintillaHistory.html
+++ b/doc/ScintillaHistory.html
@@ -525,6 +525,8 @@
 	<td>Andreas Rönnquist</td>
 	<td>Henrik Hank</td>
 	<td>Luke Rasmussen</td>
+      </tr><tr>
+	<td>maboroshin</td>
     </tr>
     </table>
     <p>
@@ -557,6 +559,9 @@
 	<a href="https://sourceforge.net/p/scintilla/feature-requests/1144/">Feature #1144.</a>
 	</li>
 	<li>
+	Markdown lexer fixes highlighting of non-ASCII characters in links.
+	</li>
+	<li>
 	Fix margin cursor on Cocoa to point more accurately.
 	</li>
     </ul>
diff --git a/lexers/LexMarkdown.cxx b/lexers/LexMarkdown.cxx
index 0dc3e374a..e3410f6ca 100644
--- a/lexers/LexMarkdown.cxx
+++ b/lexers/LexMarkdown.cxx
@@ -145,6 +145,7 @@ static void ColorizeMarkdownDoc(Sci_PositionU startPos, Sci_Position length, int
                                WordList **, Accessor &styler) {
     Sci_PositionU endPos = startPos + length;
     int precharCount = 0;
+    bool isLinkNameDetecting = false;
     // Don't advance on a new loop iteration and retry at the same position.
     // Useful in the corner case of having to start at the beginning file position
     // in the default state.
@@ -337,6 +338,27 @@ static void ColorizeMarkdownDoc(Sci_PositionU startPos, Sci_Position length, int
                 ++precharCount;
         }
 
+        // Any link
+        if (sc.state == SCE_MARKDOWN_LINK) {
+            if (sc.Match("](") && sc.GetRelative(-1) != '\\') {
+              sc.Forward(2);
+              isLinkNameDetecting = true;
+            }
+            else if (sc.Match("]:") && sc.GetRelative(-1) != '\\') {
+              sc.Forward(2);
+              sc.SetState(SCE_MARKDOWN_DEFAULT);
+            }
+            else if (!isLinkNameDetecting && sc.ch == ']' && sc.GetRelative(-1) != '\\') {
+              sc.Forward();
+              sc.SetState(SCE_MARKDOWN_DEFAULT);
+            }
+            else if (isLinkNameDetecting && sc.ch == ')' && sc.GetRelative(-1) != '\\') {
+              sc.Forward();
+              sc.SetState(SCE_MARKDOWN_DEFAULT);
+              isLinkNameDetecting = false;
+            }
+        }
+
         // New state anywhere in doc
         if (sc.state == SCE_MARKDOWN_DEFAULT) {
             if (sc.atLineStart && sc.ch == '#') {
@@ -344,38 +366,16 @@ static void ColorizeMarkdownDoc(Sci_PositionU startPos, Sci_Position length, int
                 freezeCursor = true;
             }
             // Links and Images
-            if (sc.Match("![") || sc.ch == '[') {
-                Sci_Position i = 0, j = 0, k = 0;
-                Sci_Position len = endPos - sc.currentPos;
-                while (i < len && (sc.GetRelative(++i) != ']' || sc.GetRelative(i - 1) == '\\'))
-                    ;
-                if (sc.GetRelative(i) == ']') {
-                    j = i;
-                    if (sc.GetRelative(++i) == '(') {
-                        while (i < len && (sc.GetRelative(++i) != ')' || sc.GetRelative(i - 1) == '\\'))
-                            ;
-                        if (sc.GetRelative(i) == ')')
-                            k = i;
-                    }
-                    else if (sc.GetRelative(i) == '[' || sc.GetRelative(++i) == '[') {
-                        while (i < len && (sc.GetRelative(++i) != ']' || sc.GetRelative(i - 1) == '\\'))
-                            ;
-                        if (sc.GetRelative(i) == ']')
-                            k = i;
-                    }
-                }
-                // At least a link text
-                if (j) {
-                    sc.SetState(SCE_MARKDOWN_LINK);
-                    sc.Forward(j);
-                    // Also has a URL or reference portion
-                    if (k)
-                        sc.Forward(k - j);
-                    sc.ForwardSetState(SCE_MARKDOWN_DEFAULT);
-                }
+            if (sc.Match("![")) {
+              sc.SetState(SCE_MARKDOWN_LINK);
+              sc.Forward(2);
+            }
+            else if (sc.ch == '[' && sc.GetRelative(-1) != '\\') {
+              sc.SetState(SCE_MARKDOWN_LINK);
+              sc.Forward();
             }
             // Code - also a special case for alternate inside spacing
-            if (sc.Match("``") && sc.GetRelative(3) != ' ' && AtTermStart(sc)) {
+            else if (sc.Match("``") && sc.GetRelative(3) != ' ' && AtTermStart(sc)) {
                 sc.SetState(SCE_MARKDOWN_CODE2);
                 sc.Forward();
             }
-- 
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