79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
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// Scintilla source code edit control
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/** @file Accessor.h
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** Rapid easy access to contents of a Scintilla.
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**/
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// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
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// The License.txt file describes the conditions under which this software may be distributed.
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enum { wsSpace = 1, wsTab = 2, wsSpaceTab = 4, wsInconsistent=8};
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class Accessor;
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typedef bool (*PFNIsCommentLeader)(Accessor &styler, int pos, int len);
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/**
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* Interface to data in a Scintilla.
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*/
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class Accessor {
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protected:
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enum {extremePosition=0x7FFFFFFF};
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/** @a bufferSize is a trade off between time taken to copy the characters
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* and retrieval overhead.
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* @a slopSize positions the buffer before the desired position
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* in case there is some backtracking. */
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enum {bufferSize=4000, slopSize=bufferSize/8};
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char buf[bufferSize+1];
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int startPos;
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int endPos;
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int codePage;
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virtual bool InternalIsLeadByte(char ch)=0;
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virtual void Fill(int position)=0;
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public:
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Accessor() : startPos(extremePosition), endPos(0), codePage(0) {}
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virtual ~Accessor() {}
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char operator[](int position) {
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if (position < startPos || position >= endPos) {
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Fill(position);
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}
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return buf[position - startPos];
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}
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/** Safe version of operator[], returning a defined value for invalid position. */
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char SafeGetCharAt(int position, char chDefault=' ') {
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if (position < startPos || position >= endPos) {
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Fill(position);
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if (position < startPos || position >= endPos) {
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// Position is outside range of document
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return chDefault;
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}
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}
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return buf[position - startPos];
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}
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bool IsLeadByte(char ch) {
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return codePage && InternalIsLeadByte(ch);
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}
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void SetCodePage(int codePage_) { codePage = codePage_; }
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virtual bool Match(int pos, const char *s)=0;
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virtual char StyleAt(int position)=0;
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virtual int GetLine(int position)=0;
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virtual int LineStart(int line)=0;
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virtual int LevelAt(int line)=0;
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virtual int Length()=0;
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virtual void Flush()=0;
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virtual int GetLineState(int line)=0;
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virtual int SetLineState(int line, int state)=0;
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virtual int GetPropertyInt(const char *key, int defaultValue=0)=0;
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virtual char *GetProperties()=0;
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// Style setting
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virtual void StartAt(unsigned int start, char chMask=31)=0;
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virtual void SetFlags(char chFlags_, char chWhile_)=0;
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virtual unsigned int GetStartSegment()=0;
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virtual void StartSegment(unsigned int pos)=0;
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virtual void ColourTo(unsigned int pos, int chAttr)=0;
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virtual void SetLevel(int line, int level)=0;
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virtual int IndentAmount(int line, int *flags, PFNIsCommentLeader pfnIsCommentLeader = 0)=0;
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};
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