From 4012f14e6397f5709586102540df824d8c9ca4a5 Mon Sep 17 00:00:00 2001
From: nyamatongwe <devnull@localhost>
Date: Thu, 7 Apr 2011 21:26:47 +1000
Subject: =?UTF-8?q?Add=20highlighting=20of=20current=20folding=20block.=20?=
 =?UTF-8?q?Feature=20#3147069.=20APIs=20MarkerEnableHighlight=20and=20Mark?=
 =?UTF-8?q?erSetBackSelected.=20From=20J=C3=A9r=C3=B4me=20Laforge.?=
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---
 src/Document.cxx | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)

(limited to 'src/Document.cxx')

diff --git a/src/Document.cxx b/src/Document.cxx
index e573e1906..f74ac5830 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -355,6 +355,104 @@ int Document::GetFoldParent(int line) {
 	}
 }
 
+void Document::GetHighlightDelimiters(int line, HighlightDelimiter &highlightDelimiter) {
+	int endLine = LineFromPosition(Length());
+	int beginFoldBlock = -1;
+	int endFoldBlock = -1;
+	int beginMarginCorrectlyDrawnZone = -1;
+	int endMarginCorrectlyDrawnZone = endLine + 1;
+	int endOfTailOfWhiteFlag = -1; //endOfTailOfWhiteFlag points the last SC_FOLDLEVELWHITEFLAG if follow a fold block. Otherwise endOfTailOfWhiteFlag points end of fold block.
+	int level = GetLevel(line);
+	int levelNumber = -1;
+	int lineLookLevel = -1;
+	int lineLookLevelNumber = -1;
+	int lineLook = line;
+	bool beginFoldBlockFound = false;
+	bool endFoldBlockFound = false;
+	bool beginMarginCorrectlyDrawnZoneFound = false;
+	bool endMarginCorrectlyDrawnZoneFound = false;
+
+	/*******************************************************************************/
+	/*      search backward (beginFoldBlock & beginMarginCorrectlyDrawnZone)       */
+	/*******************************************************************************/
+	for (endOfTailOfWhiteFlag = line; lineLook >= 0 && (!beginFoldBlockFound || !beginMarginCorrectlyDrawnZoneFound); --lineLook) {
+		lineLookLevel = GetLevel(lineLook);
+		if (levelNumber != -1) {
+			lineLookLevelNumber = lineLookLevel & SC_FOLDLEVELNUMBERMASK;
+			if (!beginMarginCorrectlyDrawnZoneFound && (lineLookLevelNumber > levelNumber)) {
+				beginMarginCorrectlyDrawnZoneFound = true;
+				beginMarginCorrectlyDrawnZone = endOfTailOfWhiteFlag;
+			}
+			//find the last space line (SC_FOLDLEVELWHITEFLAG).
+			if (!beginMarginCorrectlyDrawnZoneFound && !(lineLookLevel & SC_FOLDLEVELWHITEFLAG)) {
+				endOfTailOfWhiteFlag = lineLook - 1;
+			}
+			if (!beginFoldBlockFound && (lineLookLevelNumber < levelNumber)) {
+				beginFoldBlockFound = true;
+				beginFoldBlock = lineLook;
+				if (!beginMarginCorrectlyDrawnZoneFound) {
+					beginMarginCorrectlyDrawnZoneFound = true;
+					beginMarginCorrectlyDrawnZone = lineLook - 1;
+				}
+			} else 	if (!beginFoldBlockFound && lineLookLevelNumber == SC_FOLDLEVELBASE) {
+				beginFoldBlockFound = true; //beginFoldBlock already set to -1.
+			}
+		} else if (!(lineLookLevel & SC_FOLDLEVELWHITEFLAG)) {
+			endOfTailOfWhiteFlag = lineLook - 1;
+			if (lineLookLevel & SC_FOLDLEVELHEADERFLAG) {
+				beginFoldBlockFound = true;
+				beginFoldBlock = lineLook;
+				beginMarginCorrectlyDrawnZoneFound = true;
+				beginMarginCorrectlyDrawnZone = endOfTailOfWhiteFlag;
+				levelNumber = GetLevel(lineLook + 1) & SC_FOLDLEVELNUMBERMASK;;
+			} else {
+				levelNumber = lineLookLevel & SC_FOLDLEVELNUMBERMASK;
+			}
+		}
+	}
+
+	/****************************************************************************/
+	/*       search forward (endStartBlock & endMarginCorrectlyDrawnZone)       */
+	/****************************************************************************/
+	if (level & SC_FOLDLEVELHEADERFLAG) {
+		//ignore this line because this line is on first one of block.
+		lineLook = line + 1;
+	} else {
+		lineLook = line;
+	}
+	for (; lineLook <= endLine && (!endFoldBlockFound || !endMarginCorrectlyDrawnZoneFound); ++lineLook) {
+		lineLookLevel = GetLevel(lineLook);
+		lineLookLevelNumber = lineLookLevel & SC_FOLDLEVELNUMBERMASK;
+		if (!endFoldBlockFound && !(lineLookLevel & SC_FOLDLEVELWHITEFLAG) && lineLookLevelNumber < levelNumber) {
+			endFoldBlockFound = true;
+			endFoldBlock = lineLook - 1;
+			if (!endMarginCorrectlyDrawnZoneFound) {
+				endMarginCorrectlyDrawnZoneFound = true;
+				endMarginCorrectlyDrawnZone = lineLook;
+			}
+		} else if (!endFoldBlockFound && lineLookLevel == SC_FOLDLEVELBASE) {
+			endFoldBlockFound = true;
+			endFoldBlock = -1;
+		}
+		if (!endMarginCorrectlyDrawnZoneFound && (lineLookLevel & SC_FOLDLEVELHEADERFLAG)) {
+			endMarginCorrectlyDrawnZoneFound = true;
+			endMarginCorrectlyDrawnZone = lineLook;
+		}
+	}
+	if (!endFoldBlockFound && ((lineLook > endLine && lineLookLevelNumber < levelNumber) ||
+	        (levelNumber > SC_FOLDLEVELBASE))) {
+		//manage when endfold is incorrect or on last line.
+		endFoldBlock = lineLook - 1;
+		//useless to set endMarginCorrectlyDrawnZone.
+		//if endMarginCorrectlyDrawnZoneFound equals false then endMarginCorrectlyDrawnZone already equals to endLine + 1.
+	}
+
+	highlightDelimiter.beginFoldBlock = beginFoldBlock;
+	highlightDelimiter.endFoldBlock = endFoldBlock;
+	highlightDelimiter.beginMarginCorrectlyDrawnZone = beginMarginCorrectlyDrawnZone;
+	highlightDelimiter.endMarginCorrectlyDrawnZone = endMarginCorrectlyDrawnZone;
+}
+
 int Document::ClampPositionIntoDocument(int pos) {
 	return Platform::Clamp(pos, 0, Length());
 }
-- 
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