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// Scintilla source code edit control
/** @file LexPO.cxx
** Lexer for GetText Translation (PO) files.
**/
// Copyright 2012 by Colomban Wendling <ban@herbesfolles.org>
// The License.txt file describes the conditions under which this software may be distributed.
// see https://www.gnu.org/software/gettext/manual/gettext.html#PO-Files for the syntax reference
// some details are taken from the GNU msgfmt behavior (like that indent is allows in front of lines)
// TODO:
// * add keywords for flags (fuzzy, c-format, ...)
// * highlight formats inside c-format strings (%s, %d, etc.)
// * style for previous untranslated string? ("#|" comment)
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#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"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
static void ColourisePODoc(unsigned int startPos, int length, int initStyle, WordList *[], Accessor &styler) {
StyleContext sc(startPos, length, initStyle, styler);
bool escaped = false;
int curLine = styler.GetLine(startPos);
// the line state holds the last state on or before the line that isn't the default style
int curLineState = curLine > 0 ? styler.GetLineState(curLine - 1) : SCE_PO_DEFAULT;
for (; sc.More(); sc.Forward()) {
// whether we should leave a state
switch (sc.state) {
case SCE_PO_COMMENT:
case SCE_PO_PROGRAMMER_COMMENT:
case SCE_PO_REFERENCE:
case SCE_PO_FLAGS:
case SCE_PO_FUZZY:
if (sc.atLineEnd)
sc.SetState(SCE_PO_DEFAULT);
else if (sc.state == SCE_PO_FLAGS && sc.Match("fuzzy"))
// here we behave like the previous parser, but this should probably be highlighted
// on its own like a keyword rather than changing the whole flags style
sc.ChangeState(SCE_PO_FUZZY);
break;
case SCE_PO_MSGCTXT:
case SCE_PO_MSGID:
case SCE_PO_MSGSTR:
if (isspacechar(sc.ch))
sc.SetState(SCE_PO_DEFAULT);
break;
case SCE_PO_ERROR:
if (sc.atLineEnd)
sc.SetState(SCE_PO_DEFAULT);
break;
case SCE_PO_MSGCTXT_TEXT:
case SCE_PO_MSGID_TEXT:
case SCE_PO_MSGSTR_TEXT:
if (sc.atLineEnd) { // invalid inside a string
if (sc.state == SCE_PO_MSGCTXT_TEXT)
sc.ChangeState(SCE_PO_MSGCTXT_TEXT_EOL);
else if (sc.state == SCE_PO_MSGID_TEXT)
sc.ChangeState(SCE_PO_MSGID_TEXT_EOL);
else if (sc.state == SCE_PO_MSGSTR_TEXT)
sc.ChangeState(SCE_PO_MSGSTR_TEXT_EOL);
sc.SetState(SCE_PO_DEFAULT);
escaped = false;
} else {
if (escaped)
escaped = false;
else if (sc.ch == '\\')
escaped = true;
else if (sc.ch == '"')
sc.ForwardSetState(SCE_PO_DEFAULT);
}
break;
}
// whether we should enter a new state
if (sc.state == SCE_PO_DEFAULT) {
// forward to the first non-white character on the line
bool atLineStart = sc.atLineStart;
if (atLineStart) {
while (sc.More() && ! sc.atLineEnd && isspacechar(sc.ch))
sc.Forward();
}
if (atLineStart && sc.ch == '#') {
if (sc.chNext == '.')
sc.SetState(SCE_PO_PROGRAMMER_COMMENT);
else if (sc.chNext == ':')
sc.SetState(SCE_PO_REFERENCE);
else if (sc.chNext == ',')
sc.SetState(SCE_PO_FLAGS);
else
sc.SetState(SCE_PO_COMMENT);
} else if (atLineStart && sc.Match("msgid")) { // includes msgid_plural
sc.SetState(SCE_PO_MSGID);
} else if (atLineStart && sc.Match("msgstr")) { // includes [] suffixes
sc.SetState(SCE_PO_MSGSTR);
} else if (atLineStart && sc.Match("msgctxt")) {
sc.SetState(SCE_PO_MSGCTXT);
} else if (sc.ch == '"') {
if (curLineState == SCE_PO_MSGCTXT || curLineState == SCE_PO_MSGCTXT_TEXT)
sc.SetState(SCE_PO_MSGCTXT_TEXT);
else if (curLineState == SCE_PO_MSGID || curLineState == SCE_PO_MSGID_TEXT)
sc.SetState(SCE_PO_MSGID_TEXT);
else if (curLineState == SCE_PO_MSGSTR || curLineState == SCE_PO_MSGSTR_TEXT)
sc.SetState(SCE_PO_MSGSTR_TEXT);
else
sc.SetState(SCE_PO_ERROR);
} else if (! isspacechar(sc.ch))
sc.SetState(SCE_PO_ERROR);
if (sc.state != SCE_PO_DEFAULT)
curLineState = sc.state;
}
if (sc.atLineEnd) {
// Update the line state, so it can be seen by next line
curLine = styler.GetLine(sc.currentPos);
styler.SetLineState(curLine, curLineState);
}
}
sc.Complete();
}
static const char *const poWordListDesc[] = {
0
};
LexerModule lmPO(SCLEX_PO, ColourisePODoc, "po", 0, poWordListDesc);