Split a Document based Accessor (DocumentAccessor) off from

the old accessor which is now called WindowAccessor.
Accessor.h defines a common interface which is the type consumed
by the lexers.

1 files changed, 26 insertions, 76 deletions

diff --git a/include/Accessor.h b/include/Accessor.h
index 031ad7a91..fc67f07c0 100644
--- a/include/Accessor.h
+++ b/include/Accessor.h
@@ -5,84 +5,34 @@
 
 enum { wsSpace = 1, wsTab = 2, wsSpaceTab = 4, wsInconsistent=8};
 
-class Accessor {
-protected:
-	// bufferSize is a trade off between time taken to copy the characters and SendMessage overhead
-	// slopSize positions the buffer before the desired position in case there is some backtracking
-	enum {bufferSize=4000, slopSize=bufferSize/8};
-	char buf[bufferSize+1];
-	WindowID id;
-	PropSet &props;
-	int startPos;
-	int endPos;
-	int lenDoc;
-	int offset;	// Optional but including an offset makes GCC generate better code 
-	int codePage;	
-	bool InternalIsLeadByte(char ch);
-	void Fill(int position);
-public:
-	Accessor(WindowID id_, PropSet &props_, int offset_=0) : 
-			id(id_), props(props_), startPos(0x7FFFFFFF), endPos(0), 
-			lenDoc(-1), offset(offset_), codePage(0) {
-	}
-	void SetCodePage(int codePage_) { codePage = codePage_; }
-	char operator[](int position) {
-		position += offset;
-		if (position < startPos || position >= endPos) {
-			Fill(position);
-		}
-		return buf[position - startPos];
-	}
-	char SafeGetCharAt(int position, char chDefault=' ') {
-		// Safe version of operator[], returning a defined value for invalid position 
-		position += offset;
-		if (position < startPos || position >= endPos) {
-			Fill(position);
-			if (position < startPos || position >= endPos) {
-				// Position is outside range of document 
-				return chDefault;
-			}
-		}
-		return buf[position - startPos];
-	}
-	bool IsLeadByte(char ch) {
-		return codePage && InternalIsLeadByte(ch);
-	}
-	char StyleAt(int position);
-	int GetLine(int position);
-	int LineStart(int line);
-	int LevelAt(int line);
-	int Length();
-	void Flush() {
-		startPos = 0x7FFFFFFF;
-		lenDoc = -1;
-	}
-	int GetLineState(int line);
-	int SetLineState(int line, int state);
-	PropSet &GetPropSet() { return props; }
-};
+class BufferAccess;
 
-class StylingContext;
+typedef bool (*PFNIsCommentLeader)(BufferAccess &styler, int pos, int len);
 
-typedef bool (*PFNIsCommentLeader)(StylingContext &styler, int pos, int len);
-
-class StylingContext : public Accessor {
-	char styleBuf[bufferSize];
-	int validLen;
-	char chFlags;
-	char chWhile;
-	unsigned int startSeg;
+// Interface to data in a Scintilla
+class BufferAccess {
 public:
-	StylingContext(WindowID id_, PropSet &props_, int offset_=0) : 
-		Accessor(id_,props_,offset_), validLen(0), chFlags(0) {}
-	void StartAt(unsigned int start, char chMask=31);
-	void SetFlags(char chFlags_, char chWhile_) {chFlags = chFlags_; chWhile = chWhile_; };
-	unsigned int GetStartSegment() { return startSeg; }
-	void StartSegment(unsigned int pos);
-	void ColourTo(unsigned int pos, int chAttr);
-	int GetLine(int position);
-	void SetLevel(int line, int level);
-	void Flush();
-	int IndentAmount(int line, int *flags, PFNIsCommentLeader pfnIsCommentLeader = 0);
+	virtual void SetCodePage(int codePage_)=0;
+	virtual char operator[](int position)=0;
+	virtual char SafeGetCharAt(int position, char chDefault=' ')=0;
+	virtual bool IsLeadByte(char ch)=0;
+	virtual char StyleAt(int position)=0;
+	virtual int GetLine(int position)=0;
+	virtual int LineStart(int line)=0;
+	virtual int LevelAt(int line)=0;
+	virtual int Length()=0;
+	virtual void Flush()=0;
+	virtual int GetLineState(int line)=0;
+	virtual int SetLineState(int line, int state)=0;
+	virtual PropSet &GetPropSet()=0;
+
+	// Style setting
+	virtual void StartAt(unsigned int start, char chMask=31)=0;
+	virtual void SetFlags(char chFlags_, char chWhile_)=0;
+	virtual unsigned int GetStartSegment()=0;
+	virtual void StartSegment(unsigned int pos)=0;
+	virtual void ColourTo(unsigned int pos, int chAttr)=0;
+	virtual void SetLevel(int line, int level)=0;
+	virtual int IndentAmount(int line, int *flags, PFNIsCommentLeader pfnIsCommentLeader = 0)=0;
 };