Initial revision

1 files changed, 76 insertions, 0 deletions

diff --git a/include/Accessor.h b/include/Accessor.h
new file mode 100644
index 000000000..1bba4af55
--- /dev/null
+++ b/include/Accessor.h
@@ -0,0 +1,76 @@
+// SciTE - Scintilla based Text Editor
+// Accessor.h - rapid easy access to contents of a Scintilla
+// Copyright 1998-2000 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+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 
+	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_) {
+	}
+	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];
+	}
+	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 StylingContext : public Accessor {
+	char styleBuf[bufferSize];
+	int validLen;
+	char chFlags;
+	char chWhile;
+	unsigned int startSeg;
+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_; };
+	void ColourSegment(unsigned int start, unsigned int end, int chAttr);
+	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();
+};
+