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// Scintilla source code edit control
/** @file DocumentAccessor.cxx
** 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.
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include "Platform.h"
#include "PropSet.h"
#include "SVector.h"
#include "Accessor.h"
#include "DocumentAccessor.h"
#include "CellBuffer.h"
#include "Scintilla.h"
#include "CharClassify.h"
#include "Document.h"
DocumentAccessor::~DocumentAccessor() {
}
bool DocumentAccessor::InternalIsLeadByte(char ch) {
if (SC_CP_UTF8 == codePage)
// For lexing, all characters >= 0x80 are treated the
// same so none is considered a lead byte.
return false;
else
return Platform::IsDBCSLeadByte(codePage, ch);
}
void DocumentAccessor::Fill(int position) {
if (lenDoc == -1)
lenDoc = pdoc->Length();
startPos = position - slopSize;
if (startPos + bufferSize > lenDoc)
startPos = lenDoc - bufferSize;
if (startPos < 0)
startPos = 0;
endPos = startPos + bufferSize;
if (endPos > lenDoc)
endPos = lenDoc;
pdoc->GetCharRange(buf, startPos, endPos-startPos);
buf[endPos-startPos] = '\0';
}
bool DocumentAccessor::Match(int pos, const char *s) {
for (int i=0; *s; i++) {
if (*s != SafeGetCharAt(pos+i))
return false;
s++;
}
return true;
}
char DocumentAccessor::StyleAt(int position) {
// Mask off all bits which aren't in the 'mask'.
return static_cast<char>(pdoc->StyleAt(position) & mask);
}
int DocumentAccessor::GetLine(int position) {
return pdoc->LineFromPosition(position);
}
int DocumentAccessor::LineStart(int line) {
return pdoc->LineStart(line);
}
int DocumentAccessor::LevelAt(int line) {
return pdoc->GetLevel(line);
}
int DocumentAccessor::Length() {
if (lenDoc == -1)
lenDoc = pdoc->Length();
return lenDoc;
}
int DocumentAccessor::GetLineState(int line) {
return pdoc->GetLineState(line);
}
int DocumentAccessor::SetLineState(int line, int state) {
return pdoc->SetLineState(line, state);
}
void DocumentAccessor::StartAt(unsigned int start, char chMask) {
// Store the mask specified for use with StyleAt.
mask = chMask;
pdoc->StartStyling(start, chMask);
startPosStyling = start;
}
void DocumentAccessor::StartSegment(unsigned int pos) {
startSeg = pos;
}
void DocumentAccessor::ColourTo(unsigned int pos, int chAttr) {
// Only perform styling if non empty range
if (pos != startSeg - 1) {
if (pos < startSeg) {
Platform::DebugPrintf("Bad colour positions %d - %d\n", startSeg, pos);
}
if (validLen + (pos - startSeg + 1) >= bufferSize)
Flush();
if (validLen + (pos - startSeg + 1) >= bufferSize) {
// Too big for buffer so send directly
pdoc->SetStyleFor(pos - startSeg + 1, static_cast<char>(chAttr));
} else {
if (chAttr != chWhile)
chFlags = 0;
chAttr |= chFlags;
for (unsigned int i = startSeg; i <= pos; i++) {
PLATFORM_ASSERT((startPosStyling + validLen) < Length());
styleBuf[validLen++] = static_cast<char>(chAttr);
}
}
}
startSeg = pos+1;
}
void DocumentAccessor::SetLevel(int line, int level) {
pdoc->SetLevel(line, level);
}
void DocumentAccessor::Flush() {
startPos = extremePosition;
lenDoc = -1;
if (validLen > 0) {
pdoc->SetStyles(validLen, styleBuf);
startPosStyling += validLen;
validLen = 0;
}
}
int DocumentAccessor::IndentAmount(int line, int *flags, PFNIsCommentLeader pfnIsCommentLeader) {
int end = Length();
int spaceFlags = 0;
// Determines the indentation level of the current line and also checks for consistent
// indentation compared to the previous line.
// Indentation is judged consistent when the indentation whitespace of each line lines
// the same or the indentation of one line is a prefix of the other.
int pos = LineStart(line);
char ch = (*this)[pos];
int indent = 0;
bool inPrevPrefix = line > 0;
int posPrev = inPrevPrefix ? LineStart(line-1) : 0;
while ((ch == ' ' || ch == '\t') && (pos < end)) {
if (inPrevPrefix) {
char chPrev = (*this)[posPrev++];
if (chPrev == ' ' || chPrev == '\t') {
if (chPrev != ch)
spaceFlags |= wsInconsistent;
} else {
inPrevPrefix = false;
}
}
if (ch == ' ') {
spaceFlags |= wsSpace;
indent++;
} else { // Tab
spaceFlags |= wsTab;
if (spaceFlags & wsSpace)
spaceFlags |= wsSpaceTab;
indent = (indent / 8 + 1) * 8;
}
ch = (*this)[++pos];
}
*flags = spaceFlags;
indent += SC_FOLDLEVELBASE;
// if completely empty line or the start of a comment...
if ((ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r') ||
(pfnIsCommentLeader && (*pfnIsCommentLeader)(*this, pos, end-pos)) )
return indent | SC_FOLDLEVELWHITEFLAG;
else
return indent;
}
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