850b690237
git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository@124 f5eea248-9336-0410-98b8-ebc06183d4e3
475 lines
15 KiB
C++
475 lines
15 KiB
C++
// Scintilla source code edit control
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/** @file LexCPP.cxx
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** Lexer for C++, C, Java, and JavaScript.
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**/
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// Copyright 1998-2005 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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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include "Platform.h"
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#include "PropSet.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "KeyWords.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "CharacterSet.h"
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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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static bool IsSpaceEquiv(int state) {
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return (state <= SCE_C_COMMENTDOC) ||
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// including SCE_C_DEFAULT, SCE_C_COMMENT, SCE_C_COMMENTLINE
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(state == SCE_C_COMMENTLINEDOC) || (state == SCE_C_COMMENTDOCKEYWORD) ||
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(state == SCE_C_COMMENTDOCKEYWORDERROR);
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}
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// Preconditions: sc.currentPos points to a character after '+' or '-'.
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// The test for pos reaching 0 should be redundant,
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// and is in only for safety measures.
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// Limitation: this code will give the incorrect answer for code like
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// a = b+++/ptn/...
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// Putting a space between the '++' post-inc operator and the '+' binary op
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// fixes this, and is highly recommended for readability anyway.
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static bool FollowsPostfixOperator(StyleContext &sc, Accessor &styler) {
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int pos = (int) sc.currentPos;
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while (--pos > 0) {
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char ch = styler[pos];
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if (ch == '+' || ch == '-') {
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return styler[pos - 1] == ch;
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}
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}
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return false;
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}
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static void ColouriseCppDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
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Accessor &styler, bool caseSensitive) {
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WordList &keywords = *keywordlists[0];
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WordList &keywords2 = *keywordlists[1];
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WordList &keywords3 = *keywordlists[2];
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WordList &keywords4 = *keywordlists[3];
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bool stylingWithinPreprocessor = styler.GetPropertyInt("styling.within.preprocessor") != 0;
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CharacterSet setOKBeforeRE(CharacterSet::setNone, "([{=,:;!%^&*|?~+-");
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CharacterSet setCouldBePostOp(CharacterSet::setNone, "+-");
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CharacterSet setDoxygen(CharacterSet::setLower, "$@\\&<>#{}[]");
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CharacterSet setWordStart(CharacterSet::setAlpha, "_", 0x80, true);
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CharacterSet setWord(CharacterSet::setAlphaNum, "._", 0x80, true);
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if (styler.GetPropertyInt("lexer.cpp.allow.dollars", 1) != 0) {
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setWordStart.Add('$');
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setWord.Add('$');
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}
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int chPrevNonWhite = ' ';
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int visibleChars = 0;
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bool lastWordWasUUID = false;
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int styleBeforeDCKeyword = SCE_C_DEFAULT;
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bool continuationLine = false;
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if (initStyle == SCE_C_PREPROCESSOR) {
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// Set continuationLine if last character of previous line is '\'
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int lineCurrent = styler.GetLine(startPos);
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if (lineCurrent > 0) {
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int chBack = styler.SafeGetCharAt(startPos-1, 0);
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int chBack2 = styler.SafeGetCharAt(startPos-2, 0);
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int lineEndChar = '!';
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if (chBack2 == '\r' && chBack == '\n') {
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lineEndChar = styler.SafeGetCharAt(startPos-3, 0);
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} else if (chBack == '\n' || chBack == '\r') {
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lineEndChar = chBack2;
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}
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continuationLine = lineEndChar == '\\';
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}
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}
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// look back to set chPrevNonWhite properly for better regex colouring
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if (startPos > 0) {
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int back = startPos;
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while (--back && IsSpaceEquiv(styler.StyleAt(back)))
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;
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if (styler.StyleAt(back) == SCE_C_OPERATOR) {
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chPrevNonWhite = styler.SafeGetCharAt(back);
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}
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}
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StyleContext sc(startPos, length, initStyle, styler);
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for (; sc.More(); sc.Forward()) {
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if (sc.atLineStart) {
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if (sc.state == SCE_C_STRING) {
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// Prevent SCE_C_STRINGEOL from leaking back to previous line which
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// ends with a line continuation by locking in the state upto this position.
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sc.SetState(SCE_C_STRING);
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}
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// Reset states to begining of colourise so no surprises
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// if different sets of lines lexed.
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visibleChars = 0;
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lastWordWasUUID = false;
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}
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// Handle line continuation generically.
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if (sc.ch == '\\') {
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if (sc.chNext == '\n' || sc.chNext == '\r') {
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sc.Forward();
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if (sc.ch == '\r' && sc.chNext == '\n') {
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sc.Forward();
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}
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continuationLine = true;
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continue;
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}
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}
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// Determine if the current state should terminate.
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switch (sc.state) {
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case SCE_C_OPERATOR:
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sc.SetState(SCE_C_DEFAULT);
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break;
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case SCE_C_NUMBER:
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// We accept almost anything because of hex. and number suffixes
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if (!setWord.Contains(sc.ch)) {
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_IDENTIFIER:
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if (!setWord.Contains(sc.ch) || (sc.ch == '.')) {
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char s[1000];
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if (caseSensitive) {
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sc.GetCurrent(s, sizeof(s));
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} else {
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sc.GetCurrentLowered(s, sizeof(s));
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}
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if (keywords.InList(s)) {
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lastWordWasUUID = strcmp(s, "uuid") == 0;
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sc.ChangeState(SCE_C_WORD);
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} else if (keywords2.InList(s)) {
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sc.ChangeState(SCE_C_WORD2);
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} else if (keywords4.InList(s)) {
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sc.ChangeState(SCE_C_GLOBALCLASS);
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}
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_PREPROCESSOR:
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if (sc.atLineStart && !continuationLine) {
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sc.SetState(SCE_C_DEFAULT);
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} else if (stylingWithinPreprocessor) {
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if (IsASpace(sc.ch)) {
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sc.SetState(SCE_C_DEFAULT);
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}
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} else {
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if (sc.Match('/', '*') || sc.Match('/', '/')) {
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sc.SetState(SCE_C_DEFAULT);
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}
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}
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break;
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case SCE_C_COMMENT:
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if (sc.Match('*', '/')) {
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_COMMENTDOC:
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if (sc.Match('*', '/')) {
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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} else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
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// Verify that we have the conditions to mark a comment-doc-keyword
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if ((IsASpace(sc.chPrev) || sc.chPrev == '*') && (!IsASpace(sc.chNext))) {
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styleBeforeDCKeyword = SCE_C_COMMENTDOC;
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sc.SetState(SCE_C_COMMENTDOCKEYWORD);
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}
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}
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break;
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case SCE_C_COMMENTLINE:
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if (sc.atLineStart) {
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_COMMENTLINEDOC:
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if (sc.atLineStart) {
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sc.SetState(SCE_C_DEFAULT);
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} else if (sc.ch == '@' || sc.ch == '\\') { // JavaDoc and Doxygen support
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// Verify that we have the conditions to mark a comment-doc-keyword
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if ((IsASpace(sc.chPrev) || sc.chPrev == '/' || sc.chPrev == '!') && (!IsASpace(sc.chNext))) {
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styleBeforeDCKeyword = SCE_C_COMMENTLINEDOC;
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sc.SetState(SCE_C_COMMENTDOCKEYWORD);
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}
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}
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break;
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case SCE_C_COMMENTDOCKEYWORD:
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if ((styleBeforeDCKeyword == SCE_C_COMMENTDOC) && sc.Match('*', '/')) {
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sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
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sc.Forward();
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sc.ForwardSetState(SCE_C_DEFAULT);
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} else if (!setDoxygen.Contains(sc.ch)) {
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char s[100];
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if (caseSensitive) {
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sc.GetCurrent(s, sizeof(s));
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} else {
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sc.GetCurrentLowered(s, sizeof(s));
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}
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if (!IsASpace(sc.ch) || !keywords3.InList(s + 1)) {
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sc.ChangeState(SCE_C_COMMENTDOCKEYWORDERROR);
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}
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sc.SetState(styleBeforeDCKeyword);
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}
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break;
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case SCE_C_STRING:
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if (sc.atLineEnd) {
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sc.ChangeState(SCE_C_STRINGEOL);
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} else if (sc.ch == '\\') {
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if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
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sc.Forward();
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}
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} else if (sc.ch == '\"') {
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_CHARACTER:
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if (sc.atLineEnd) {
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sc.ChangeState(SCE_C_STRINGEOL);
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} else if (sc.ch == '\\') {
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if (sc.chNext == '\"' || sc.chNext == '\'' || sc.chNext == '\\') {
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sc.Forward();
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}
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} else if (sc.ch == '\'') {
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_REGEX:
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if (sc.atLineStart) {
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sc.SetState(SCE_C_DEFAULT);
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} else if (sc.ch == '/') {
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sc.Forward();
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while ((sc.ch < 0x80) && islower(sc.ch))
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sc.Forward(); // gobble regex flags
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sc.SetState(SCE_C_DEFAULT);
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} else if (sc.ch == '\\') {
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// Gobble up the quoted character
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if (sc.chNext == '\\' || sc.chNext == '/') {
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sc.Forward();
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}
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}
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break;
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case SCE_C_STRINGEOL:
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if (sc.atLineStart) {
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sc.SetState(SCE_C_DEFAULT);
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}
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break;
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case SCE_C_VERBATIM:
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if (sc.ch == '\"') {
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if (sc.chNext == '\"') {
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sc.Forward();
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} else {
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sc.ForwardSetState(SCE_C_DEFAULT);
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}
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}
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break;
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case SCE_C_UUID:
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if (sc.ch == '\r' || sc.ch == '\n' || sc.ch == ')') {
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sc.SetState(SCE_C_DEFAULT);
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}
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}
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// Determine if a new state should be entered.
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if (sc.state == SCE_C_DEFAULT) {
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if (sc.Match('@', '\"')) {
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sc.SetState(SCE_C_VERBATIM);
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sc.Forward();
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} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
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if (lastWordWasUUID) {
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sc.SetState(SCE_C_UUID);
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lastWordWasUUID = false;
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} else {
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sc.SetState(SCE_C_NUMBER);
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}
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} else if (setWordStart.Contains(sc.ch) || (sc.ch == '@')) {
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if (lastWordWasUUID) {
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sc.SetState(SCE_C_UUID);
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lastWordWasUUID = false;
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} else {
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sc.SetState(SCE_C_IDENTIFIER);
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}
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} else if (sc.Match('/', '*')) {
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if (sc.Match("/**") || sc.Match("/*!")) { // Support of Qt/Doxygen doc. style
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sc.SetState(SCE_C_COMMENTDOC);
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} else {
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sc.SetState(SCE_C_COMMENT);
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}
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sc.Forward(); // Eat the * so it isn't used for the end of the comment
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} else if (sc.Match('/', '/')) {
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if ((sc.Match("///") && !sc.Match("////")) || sc.Match("//!"))
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// Support of Qt/Doxygen doc. style
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sc.SetState(SCE_C_COMMENTLINEDOC);
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else
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sc.SetState(SCE_C_COMMENTLINE);
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} else if (sc.ch == '/' && setOKBeforeRE.Contains(chPrevNonWhite) &&
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(!setCouldBePostOp.Contains(chPrevNonWhite) || !FollowsPostfixOperator(sc, styler))) {
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sc.SetState(SCE_C_REGEX); // JavaScript's RegEx
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} else if (sc.ch == '\"') {
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sc.SetState(SCE_C_STRING);
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} else if (sc.ch == '\'') {
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sc.SetState(SCE_C_CHARACTER);
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} else if (sc.ch == '#' && visibleChars == 0) {
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// Preprocessor commands are alone on their line
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sc.SetState(SCE_C_PREPROCESSOR);
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// Skip whitespace between # and preprocessor word
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do {
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sc.Forward();
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} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
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if (sc.atLineEnd) {
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sc.SetState(SCE_C_DEFAULT);
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}
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} else if (isoperator(static_cast<char>(sc.ch))) {
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sc.SetState(SCE_C_OPERATOR);
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}
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}
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if (!IsASpace(sc.ch) && !IsSpaceEquiv(sc.state)) {
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chPrevNonWhite = sc.ch;
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visibleChars++;
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}
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continuationLine = false;
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}
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sc.Complete();
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}
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static bool IsStreamCommentStyle(int style) {
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return style == SCE_C_COMMENT ||
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style == SCE_C_COMMENTDOC ||
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style == SCE_C_COMMENTDOCKEYWORD ||
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style == SCE_C_COMMENTDOCKEYWORDERROR;
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}
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// Store both the current line's fold level and the next lines in the
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// level store to make it easy to pick up with each increment
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// and to make it possible to fiddle the current level for "} else {".
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static void FoldCppDoc(unsigned int startPos, int length, int initStyle,
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WordList *[], Accessor &styler) {
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bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
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bool foldPreprocessor = styler.GetPropertyInt("fold.preprocessor") != 0;
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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
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bool foldAtElse = styler.GetPropertyInt("fold.at.else", 0) != 0;
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unsigned int endPos = startPos + length;
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int visibleChars = 0;
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int lineCurrent = styler.GetLine(startPos);
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int levelCurrent = SC_FOLDLEVELBASE;
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if (lineCurrent > 0)
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levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
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int levelMinCurrent = levelCurrent;
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int levelNext = levelCurrent;
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char chNext = styler[startPos];
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int styleNext = styler.StyleAt(startPos);
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int style = initStyle;
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for (unsigned int i = startPos; i < endPos; i++) {
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char ch = chNext;
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chNext = styler.SafeGetCharAt(i + 1);
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int stylePrev = style;
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style = styleNext;
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styleNext = styler.StyleAt(i + 1);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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if (foldComment && IsStreamCommentStyle(style)) {
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if (!IsStreamCommentStyle(stylePrev) && (stylePrev != SCE_C_COMMENTLINEDOC)) {
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levelNext++;
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} else if (!IsStreamCommentStyle(styleNext) && (styleNext != SCE_C_COMMENTLINEDOC) && !atEOL) {
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// Comments don't end at end of line and the next character may be unstyled.
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levelNext--;
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}
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}
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if (foldComment && (style == SCE_C_COMMENTLINE)) {
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if ((ch == '/') && (chNext == '/')) {
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char chNext2 = styler.SafeGetCharAt(i + 2);
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if (chNext2 == '{') {
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levelNext++;
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} else if (chNext2 == '}') {
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levelNext--;
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}
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}
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}
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if (foldPreprocessor && (style == SCE_C_PREPROCESSOR)) {
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if (ch == '#') {
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unsigned int j = i + 1;
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while ((j < endPos) && IsASpaceOrTab(styler.SafeGetCharAt(j))) {
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j++;
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}
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if (styler.Match(j, "region") || styler.Match(j, "if")) {
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levelNext++;
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} else if (styler.Match(j, "end")) {
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levelNext--;
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}
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}
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}
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if (style == SCE_C_OPERATOR) {
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if (ch == '{') {
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// Measure the minimum before a '{' to allow
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// folding on "} else {"
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if (levelMinCurrent > levelNext) {
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levelMinCurrent = levelNext;
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}
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levelNext++;
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} else if (ch == '}') {
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levelNext--;
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}
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}
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if (!IsASpace(ch))
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visibleChars++;
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if (atEOL || (i == endPos-1)) {
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int levelUse = levelCurrent;
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if (foldAtElse) {
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levelUse = levelMinCurrent;
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}
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int lev = levelUse | levelNext << 16;
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if (visibleChars == 0 && foldCompact)
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lev |= SC_FOLDLEVELWHITEFLAG;
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if (levelUse < levelNext)
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lev |= SC_FOLDLEVELHEADERFLAG;
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if (lev != styler.LevelAt(lineCurrent)) {
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styler.SetLevel(lineCurrent, lev);
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}
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lineCurrent++;
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levelCurrent = levelNext;
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levelMinCurrent = levelCurrent;
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visibleChars = 0;
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}
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}
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char lastChar = styler.SafeGetCharAt(endPos-1);
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if ((unsigned)styler.Length() == endPos && (lastChar == '\n' || lastChar == '\r')) {
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styler.SetLevel(lineCurrent, levelCurrent);
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}
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}
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static const char * const cppWordLists[] = {
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"Primary keywords and identifiers",
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"Secondary keywords and identifiers",
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"Documentation comment keywords",
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"Unused",
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"Global classes and typedefs",
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0,
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};
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static void ColouriseCppDocSensitive(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
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Accessor &styler) {
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ColouriseCppDoc(startPos, length, initStyle, keywordlists, styler, true);
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}
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static void ColouriseCppDocInsensitive(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
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Accessor &styler) {
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ColouriseCppDoc(startPos, length, initStyle, keywordlists, styler, false);
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}
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LexerModule lmCPP(SCLEX_CPP, ColouriseCppDocSensitive, "cpp", FoldCppDoc, cppWordLists);
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LexerModule lmCPPNoCase(SCLEX_CPPNOCASE, ColouriseCppDocInsensitive, "cppnocase", FoldCppDoc, cppWordLists);
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