From bddae2d12fd9a0856bfa2395c6a041f9603f73f1 Mon Sep 17 00:00:00 2001
From: nyamatongwe <unknown>
Date: Fri, 9 Dec 2005 22:22:10 +0000
Subject: Fixed bug #1373855 by taking DBCS into account when matching braces.
 Moved brace matching from Editor into Document.

---
 src/Document.cxx | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

(limited to 'src/Document.cxx')

diff --git a/src/Document.cxx b/src/Document.cxx
index fcd5c91d7..7b189541a 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -1539,3 +1539,55 @@ int Document::ExtendStyleRange(int pos, int delta, bool singleLine) {
 	}
 	return pos;
 }
+
+static char BraceOpposite(char ch) {
+	switch (ch) {
+	case '(':
+		return ')';
+	case ')':
+		return '(';
+	case '[':
+		return ']';
+	case ']':
+		return '[';
+	case '{':
+		return '}';
+	case '}':
+		return '{';
+	case '<':
+		return '>';
+	case '>':
+		return '<';
+	default:
+		return '\0';
+	}
+}
+
+// TODO: should be able to extend styled region to find matching brace
+int Document::BraceMatch(int position, int /*maxReStyle*/) {
+	char chBrace = CharAt(position);
+	char chSeek = BraceOpposite(chBrace);
+	if (chSeek == '\0')
+		return - 1;
+	char styBrace = static_cast<char>(StyleAt(position) & stylingBitsMask);
+	int direction = -1;
+	if (chBrace == '(' || chBrace == '[' || chBrace == '{' || chBrace == '<')
+		direction = 1;
+	int depth = 1;
+	position = position + direction;
+	while ((position >= 0) && (position < Length())) {
+		position = MovePositionOutsideChar(position, direction);
+		char chAtPos = CharAt(position);
+		char styAtPos = static_cast<char>(StyleAt(position) & stylingBitsMask);
+		if ((position > GetEndStyled()) || (styAtPos == styBrace)) {
+			if (chAtPos == chBrace)
+				depth++;
+			if (chAtPos == chSeek)
+				depth--;
+			if (depth == 0)
+				return position;
+		}
+		position = position + direction;
+	}
+	return - 1;
+}
-- 
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