Add highlighting of current folding block. Feature #3147069.

APIs MarkerEnableHighlight and MarkerSetBackSelected.
From Jérôme Laforge.

1 files changed, 42 insertions, 0 deletions

diff --git a/src/Document.h b/src/Document.h
index fd0998260..851c10081 100644
--- a/src/Document.h
+++ b/src/Document.h
@@ -115,6 +115,47 @@ struct StyledText {
 	}
 };
 
+class HighlightDelimiter {
+public:
+	HighlightDelimiter() {
+		beginFoldBlock = -1;
+		endFoldBlock = -1;
+		beginMarginCorrectlyDrawnZone = -1;
+		endMarginCorrectlyDrawnZone = -1;
+		isEnabled = false;
+	}
+
+	bool NeedsDrawing(int line) {
+		return isEnabled && (line <= beginMarginCorrectlyDrawnZone || endMarginCorrectlyDrawnZone <= line);
+	}
+
+	bool isCurrentBlockHighlight(int line) {
+		return isEnabled && beginFoldBlock <= line && line <= endFoldBlock;
+	}
+
+	bool isHeadBlockFold(int line) {
+		return beginFoldBlock == line && line < endFoldBlock;
+	}
+
+	bool isBodyBlockFold(int line) {
+		return beginFoldBlock < line && line < endFoldBlock;
+	}
+
+	bool isTailBlockFold(int line) {
+		return beginFoldBlock < line && line == endFoldBlock;
+	}
+
+	// beginFoldBlock : Begin of current fold block.
+	// endStartBlock : End of zone where margin is already drawn.
+	// beginMarginCorrectlyDrawnZone : Begin of zone where margin is already drawn.
+	// endMarginCorrectlyDrawnZone : End of current fold block.
+	int beginFoldBlock;
+	int endFoldBlock;
+	int beginMarginCorrectlyDrawnZone;
+	int endMarginCorrectlyDrawnZone;
+	bool isEnabled;
+};
+
 class CaseFolder {
 public:
 	virtual ~CaseFolder() {
@@ -299,6 +340,7 @@ public:
 	void ClearLevels();
 	int GetLastChild(int lineParent, int level=-1);
 	int GetFoldParent(int line);
+	void GetHighlightDelimiters(int line, HighlightDelimiter &hDelimiter);
 
 	void Indent(bool forwards);
 	int ExtendWordSelect(int pos, int delta, bool onlyWordCharacters=false);