Fix problem where PHP sequence stops backtracking to tag start. Bug #3520027.

Now backtracks by whole lines until not inside tag.

1 files changed, 4 insertions, 3 deletions

diff --git a/lexers/LexHTML.cxx b/lexers/LexHTML.cxx
index 9ebca16f8..7534acc8e 100644
--- a/lexers/LexHTML.cxx
+++ b/lexers/LexHTML.cxx
@@ -598,11 +598,12 @@ static void ColouriseHyperTextDoc(unsigned int startPos, int length, int initSty
 	char djangoBlockType[2];
 	djangoBlockType[0] = '\0';
 
-	// If inside a tag, it may be a script tag, so reread from the start to ensure any language tags are seen
+	// If inside a tag, it may be a script tag, so reread from the start of line starting tag to ensure any language tags are seen
 	if (InTagState(state)) {
 		while ((startPos > 0) && (InTagState(styler.StyleAt(startPos - 1)))) {
-			startPos--;
-			length++;
+			int backLineStart = styler.LineStart(styler.GetLine(startPos-1));
+			length += startPos - backLineStart;
+			startPos = backLineStart;
 		}
 		state = SCE_H_DEFAULT;
 	}