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// Scintilla source code edit control
/** @file LexProps.cxx
** Lexer for properties files.
**/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <cstdlib>
#include <cassert>
#include <string>
#include <string_view>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"
using namespace Lexilla;
namespace {
bool AtEOL(Accessor &styler, Sci_PositionU i) {
return (styler[i] == '\n') ||
((styler[i] == '\r') && (styler.SafeGetCharAt(i + 1) != '\n'));
}
constexpr bool isAssignChar(char ch) noexcept {
return (ch == '=') || (ch == ':');
}
void ColourisePropsLine(
const char *lineBuffer,
Sci_PositionU lengthLine,
Sci_PositionU startLine,
Sci_PositionU endPos,
Accessor &styler,
bool allowInitialSpaces) {
Sci_PositionU i = 0;
if (allowInitialSpaces) {
while ((i < lengthLine) && isspacechar(lineBuffer[i])) // Skip initial spaces
i++;
} else {
if (isspacechar(lineBuffer[i])) // don't allow initial spaces
i = lengthLine;
}
if (i < lengthLine) {
if (lineBuffer[i] == '#' || lineBuffer[i] == '!' || lineBuffer[i] == ';') {
styler.ColourTo(endPos, SCE_PROPS_COMMENT);
} else if (lineBuffer[i] == '[') {
styler.ColourTo(endPos, SCE_PROPS_SECTION);
} else if (lineBuffer[i] == '@') {
styler.ColourTo(startLine + i, SCE_PROPS_DEFVAL);
if (isAssignChar(lineBuffer[i++]))
styler.ColourTo(startLine + i, SCE_PROPS_ASSIGNMENT);
styler.ColourTo(endPos, SCE_PROPS_DEFAULT);
} else {
// Search for the '=' character
while ((i < lengthLine) && !isAssignChar(lineBuffer[i]))
i++;
if ((i < lengthLine) && isAssignChar(lineBuffer[i])) {
styler.ColourTo(startLine + i - 1, SCE_PROPS_KEY);
styler.ColourTo(startLine + i, SCE_PROPS_ASSIGNMENT);
styler.ColourTo(endPos, SCE_PROPS_DEFAULT);
} else {
styler.ColourTo(endPos, SCE_PROPS_DEFAULT);
}
}
} else {
styler.ColourTo(endPos, SCE_PROPS_DEFAULT);
}
}
void ColourisePropsDoc(Sci_PositionU startPos, Sci_Position length, int, WordList *[], Accessor &styler) {
std::string lineBuffer;
styler.StartAt(startPos);
styler.StartSegment(startPos);
Sci_PositionU startLine = startPos;
// property lexer.props.allow.initial.spaces
// For properties files, set to 0 to style all lines that start with whitespace in the default style.
// This is not suitable for SciTE .properties files which use indentation for flow control but
// can be used for RFC2822 text where indentation is used for continuation lines.
const bool allowInitialSpaces = styler.GetPropertyInt("lexer.props.allow.initial.spaces", 1) != 0;
for (Sci_PositionU i = startPos; i < startPos + length; i++) {
lineBuffer.push_back(styler[i]);
if (AtEOL(styler, i)) {
// End of line (or of line buffer) met, colourise it
ColourisePropsLine(lineBuffer.c_str(), lineBuffer.length(), startLine, i, styler, allowInitialSpaces);
lineBuffer.clear();
startLine = i + 1;
}
}
if (lineBuffer.length() > 0) { // Last line does not have ending characters
ColourisePropsLine(lineBuffer.c_str(), lineBuffer.length(), startLine, startPos + length - 1, styler, allowInitialSpaces);
}
}
// adaption by ksc, using the "} else {" trick of 1.53
// 030721
void FoldPropsDoc(Sci_PositionU startPos, Sci_Position length, int, WordList *[], Accessor &styler) {
const bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
const Sci_PositionU endPos = startPos + length;
int visibleChars = 0;
Sci_Position lineCurrent = styler.GetLine(startPos);
char chNext = styler[startPos];
bool headerPoint = false;
int levelPrevious = (lineCurrent > 0) ? styler.LevelAt(lineCurrent - 1) : SC_FOLDLEVELBASE;
for (Sci_PositionU i = startPos; i < endPos; i++) {
const char ch = chNext;
chNext = styler[i+1];
const int style = styler.StyleIndexAt(i);
const bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
if (style == SCE_PROPS_SECTION) {
headerPoint = true;
}
if (atEOL) {
int lev = levelPrevious & SC_FOLDLEVELNUMBERMASK;
if (headerPoint) {
lev = SC_FOLDLEVELBASE | SC_FOLDLEVELHEADERFLAG;
if (levelPrevious & SC_FOLDLEVELHEADERFLAG) {
// previous section is empty
styler.SetLevel(lineCurrent - 1, SC_FOLDLEVELBASE);
}
} else if (levelPrevious & SC_FOLDLEVELHEADERFLAG) {
lev += 1;
}
if (visibleChars == 0 && foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
if (lev != styler.LevelAt(lineCurrent)) {
styler.SetLevel(lineCurrent, lev);
}
lineCurrent++;
visibleChars = 0;
headerPoint = false;
levelPrevious = lev;
}
if (!isspacechar(ch))
visibleChars++;
}
int level = levelPrevious & SC_FOLDLEVELNUMBERMASK;
if (levelPrevious & SC_FOLDLEVELHEADERFLAG) {
level += 1;
}
const int flagsNext = styler.LevelAt(lineCurrent);
styler.SetLevel(lineCurrent, level | (flagsNext & ~SC_FOLDLEVELNUMBERMASK));
}
const char *const emptyWordListDesc[] = {
nullptr
};
}
LexerModule lmProps(SCLEX_PROPERTIES, ColourisePropsDoc, "props", FoldPropsDoc, emptyWordListDesc);
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