1 files changed, 25 insertions, 49 deletions

diff --git a/src/ContractionState.h b/src/ContractionState.h
index eb141ea33..a951e0a0c 100644
--- a/src/ContractionState.h
+++ b/src/ContractionState.h
@@ -10,67 +10,43 @@
 
 namespace Scintilla {
 
-template<class T>
-class SparseVector;
-
 /**
- */
-class ContractionState {
-	// These contain 1 element for every document line.
-	std::unique_ptr<RunStyles<Sci::Line, char>> visible;
-	std::unique_ptr<RunStyles<Sci::Line, char>> expanded;
-	std::unique_ptr<RunStyles<Sci::Line, int>> heights;
-	std::unique_ptr<SparseVector<UniqueString>> foldDisplayTexts;
-	std::unique_ptr<Partitioning<Sci::Line>> displayLines;
-	Sci::Line linesInDocument;
-
-	void EnsureData();
-
-	bool OneToOne() const {
-		// True when each document line is exactly one display line so need for
-		// complex data structures.
-		return visible == nullptr;
-	}
-
+*/
+class IContractionState {
 public:
-	ContractionState();
-	// Deleted so ContractionState objects can not be copied.
-	ContractionState(const ContractionState &) = delete;
-	void operator=(const ContractionState &) = delete;
-	virtual ~ContractionState();
+	virtual ~IContractionState() {};
 
-	void Clear();
+	virtual void Clear()=0;
 
-	Sci::Line LinesInDoc() const;
-	Sci::Line LinesDisplayed() const;
-	Sci::Line DisplayFromDoc(Sci::Line lineDoc) const;
-	Sci::Line DisplayLastFromDoc(Sci::Line lineDoc) const;
-	Sci::Line DocFromDisplay(Sci::Line lineDisplay) const;
+	virtual Sci::Line LinesInDoc() const=0;
+	virtual Sci::Line LinesDisplayed() const=0;
+	virtual Sci::Line DisplayFromDoc(Sci::Line lineDoc) const=0;
+	virtual Sci::Line DisplayLastFromDoc(Sci::Line lineDoc) const=0;
+	virtual Sci::Line DocFromDisplay(Sci::Line lineDisplay) const=0;
 
-	void InsertLine(Sci::Line lineDoc);
-	void InsertLines(Sci::Line lineDoc, Sci::Line lineCount);
-	void DeleteLine(Sci::Line lineDoc);
-	void DeleteLines(Sci::Line lineDoc, Sci::Line lineCount);
+	virtual void InsertLines(Sci::Line lineDoc, Sci::Line lineCount)=0;
+	virtual void DeleteLines(Sci::Line lineDoc, Sci::Line lineCount)=0;
 
-	bool GetVisible(Sci::Line lineDoc) const;
-	bool SetVisible(Sci::Line lineDocStart, Sci::Line lineDocEnd, bool isVisible);
-	bool HiddenLines() const;
+	virtual bool GetVisible(Sci::Line lineDoc) const=0;
+	virtual bool SetVisible(Sci::Line lineDocStart, Sci::Line lineDocEnd, bool isVisible)=0;
+	virtual bool HiddenLines() const=0;
 
-	const char *GetFoldDisplayText(Sci::Line lineDoc) const;
-	bool SetFoldDisplayText(Sci::Line lineDoc, const char *text);
+	virtual const char *GetFoldDisplayText(Sci::Line lineDoc) const=0;
+	virtual bool GetFoldDisplayTextShown(Sci::Line lineDoc) const=0;
+	virtual bool SetFoldDisplayText(Sci::Line lineDoc, const char *text)=0;
 
-	bool GetExpanded(Sci::Line lineDoc) const;
-	bool SetExpanded(Sci::Line lineDoc, bool isExpanded);
-	bool GetFoldDisplayTextShown(Sci::Line lineDoc) const;
-	Sci::Line ContractedNext(Sci::Line lineDocStart) const;
+	virtual bool GetExpanded(Sci::Line lineDoc) const=0;
+	virtual bool SetExpanded(Sci::Line lineDoc, bool isExpanded)=0;
+	virtual Sci::Line ContractedNext(Sci::Line lineDocStart) const=0;
 
-	int GetHeight(Sci::Line lineDoc) const;
-	bool SetHeight(Sci::Line lineDoc, int height);
+	virtual int GetHeight(Sci::Line lineDoc) const=0;
+	virtual bool SetHeight(Sci::Line lineDoc, int height)=0;
 
-	void ShowAll();
-	void Check() const;
+	virtual void ShowAll()=0;
 };
 
+std::unique_ptr<IContractionState> ContractionStateCreate();
+
 }
 
 #endif