1 files changed, 79 insertions, 0 deletions
diff --git a/lexlib/Accessor.h b/lexlib/Accessor.h
new file mode 100644
index 000000000..d9db9c7bf
--- /dev/null
+++ b/lexlib/Accessor.h
@@ -0,0 +1,79 @@
+// Scintilla source code edit control
+/** @file Accessor.h
+ ** Rapid easy access to contents of a Scintilla.
+ **/
+// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+enum { wsSpace = 1, wsTab = 2, wsSpaceTab = 4, wsInconsistent=8};
+
+class Accessor;
+
+typedef bool (*PFNIsCommentLeader)(Accessor &styler, int pos, int len);
+
+/**
+ * Interface to data in a Scintilla.
+ */
+class Accessor {
+protected:
+	enum {extremePosition=0x7FFFFFFF};
+	/** @a bufferSize is a trade off between time taken to copy the characters
+	 * and retrieval overhead.
+	 * @a slopSize positions the buffer before the desired position
+	 * in case there is some backtracking. */
+	enum {bufferSize=4000, slopSize=bufferSize/8};
+	char buf[bufferSize+1];
+	int startPos;
+	int endPos;
+	int codePage;	
+
+	virtual bool InternalIsLeadByte(char ch)=0;
+	virtual void Fill(int position)=0;
+
+public:
+	Accessor() : startPos(extremePosition), endPos(0), codePage(0) {}
+	virtual ~Accessor() {}
+	char operator[](int position) {
+		if (position < startPos || position >= endPos) {
+			Fill(position);
+		}
+		return buf[position - startPos];
+	}
+	/** Safe version of operator[], returning a defined value for invalid position. */
+	char SafeGetCharAt(int position, char chDefault=' ') {
+		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);
+	}
+	void SetCodePage(int codePage_) { codePage = codePage_; }
+
+	virtual bool Match(int pos, const char *s)=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 int GetPropertyInt(const char *key, int defaultValue=0)=0;
+	virtual char *GetProperties()=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;
+	virtual void IndicatorFill(int start, int end, int indicator, int value)=0;
+};