1 files changed, 65 insertions, 0 deletions
diff --git a/src/ContractionState.h b/src/ContractionState.h
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--- /dev/null
+++ b/src/ContractionState.h
@@ -0,0 +1,65 @@
+// Scintilla source code edit control
+/** @file ContractionState.h
+ ** Manages visibility of lines for folding.
+ **/
+// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#ifndef CONTRACTIONSTATE_H
+#define CONTRACTIONSTATE_H
+
+/**
+ */
+class OneLine {
+public:
+	int displayLine;	///< Position within set of visible lines
+	//int docLine;		///< Inverse of @a displayLine
+	int height;	///< Number of display lines needed to show all of the line
+	bool visible;
+	bool expanded;
+
+	OneLine();
+	virtual ~OneLine() {}
+};
+
+/**
+ */
+class ContractionState {
+	void Grow(int sizeNew);
+	enum { growSize = 4000 };
+	int linesInDoc;
+	mutable int linesInDisplay;
+	mutable OneLine *lines;
+	int size;
+	mutable int *docLines;
+	mutable int sizeDocLines;
+	mutable bool valid;
+	void MakeValid() const;
+
+public:
+	ContractionState();
+	virtual ~ContractionState();
+
+	void Clear();
+
+	int LinesInDoc() const;
+	int LinesDisplayed() const;
+	int DisplayFromDoc(int lineDoc) const;
+	int DocFromDisplay(int lineDisplay) const;
+
+	void InsertLines(int lineDoc, int lineCount);
+	void DeleteLines(int lineDoc, int lineCount);
+
+	bool GetVisible(int lineDoc) const;
+	bool SetVisible(int lineDocStart, int lineDocEnd, bool visible);
+
+	bool GetExpanded(int lineDoc) const;
+	bool SetExpanded(int lineDoc, bool expanded);
+
+	int GetHeight(int lineDoc) const;
+	bool SetHeight(int lineDoc, int height);
+
+	void ShowAll();
+};
+
+#endif