diff options
Diffstat (limited to 'lexers/LexPO.cxx')
| -rw-r--r-- | lexers/LexPO.cxx | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/lexers/LexPO.cxx b/lexers/LexPO.cxx new file mode 100644 index 000000000..d1ccda394 --- /dev/null +++ b/lexers/LexPO.cxx @@ -0,0 +1,150 @@ +// 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.) + +#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 if (sc.chNext == '|') + sc.SetState(SCE_PO_COMMENT); // previous untranslated string, no special style yet + 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); |