-// SciTE - Scintilla based Text Editor
-// Accessor.h - rapid easy access to contents of a Scintilla
-// Copyright 1998-2000 by Neil Hodgson <neilh@scintilla.org>
+// 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:
- // 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 {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];
- 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);
+
+ virtual bool InternalIsLeadByte(char ch)=0;
+ virtual void Fill(int position)=0;
+
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_; }
+ Accessor() : startPos(extremePosition), endPos(0), codePage(0) {}
+ virtual ~Accessor() {}
char operator[](int position) {
- position += offset;
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=' ') {
- // 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) {
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 StylingContext;
+ void SetCodePage(int codePage_) { codePage = codePage_; }
-typedef bool (*PFNIsCommentLeader)(StylingContext &styler, int pos, int len);
+ 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;
-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_; };
- 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);
+ // 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;
};
-