376 lines
13 KiB
C++
376 lines
13 KiB
C++
// Scintilla source code edit control
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/** @file LexCSS.cxx
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** Lexer for Cascading Style Sheets
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** Written by Jakub Vrána
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** Improved by Philippe Lhoste (CSS2)
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**/
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// Copyright 1998-2002 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 <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "PropSetSimple.h"
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#include "WordList.h"
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#include "LexAccessor.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "LexerModule.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 inline bool IsAWordChar(const unsigned int ch) {
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/* FIXME:
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* The CSS spec allows "ISO 10646 characters U+00A1 and higher" to be treated as word chars.
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* Unfortunately, we are only getting string bytes here, and not full unicode characters. We cannot guarantee
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* that our byte is between U+0080 - U+00A0 (to return false), so we have to allow all characters U+0080 and higher
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*/
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return ch >= 0x80 || isalnum(ch) || ch == '-' || ch == '_';
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}
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inline bool IsCssOperator(const int ch) {
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if (!((ch < 0x80) && isalnum(ch)) &&
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(ch == '{' || ch == '}' || ch == ':' || ch == ',' || ch == ';' ||
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ch == '.' || ch == '#' || ch == '!' || ch == '@' ||
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/* CSS2 */
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ch == '*' || ch == '>' || ch == '+' || ch == '=' || ch == '~' || ch == '|' ||
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ch == '[' || ch == ']' || ch == '(' || ch == ')')) {
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return true;
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}
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return false;
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}
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static void ColouriseCssDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[], Accessor &styler) {
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WordList &css1Props = *keywordlists[0];
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WordList &pseudoClasses = *keywordlists[1];
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WordList &css2Props = *keywordlists[2];
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WordList &css3Props = *keywordlists[3];
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WordList &pseudoElements = *keywordlists[4];
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WordList &exProps = *keywordlists[5];
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WordList &exPseudoClasses = *keywordlists[6];
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WordList &exPseudoElements = *keywordlists[7];
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StyleContext sc(startPos, length, initStyle, styler);
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int lastState = -1; // before operator
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int lastStateC = -1; // before comment
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int lastStateS = -1; // before single-quoted/double-quoted string
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int op = ' '; // last operator
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int opPrev = ' '; // last operator
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for (; sc.More(); sc.Forward()) {
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if (sc.state == SCE_CSS_COMMENT && sc.Match('*', '/')) {
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if (lastStateC == -1) {
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// backtrack to get last state:
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// comments are like whitespace, so we must return to the previous state
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unsigned int i = startPos;
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for (; i > 0; i--) {
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if ((lastStateC = styler.StyleAt(i-1)) != SCE_CSS_COMMENT) {
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if (lastStateC == SCE_CSS_OPERATOR) {
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op = styler.SafeGetCharAt(i-1);
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opPrev = styler.SafeGetCharAt(i-2);
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while (--i) {
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lastState = styler.StyleAt(i-1);
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if (lastState != SCE_CSS_OPERATOR && lastState != SCE_CSS_COMMENT)
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break;
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}
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if (i == 0)
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lastState = SCE_CSS_DEFAULT;
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}
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break;
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}
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}
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if (i == 0)
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lastStateC = SCE_CSS_DEFAULT;
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}
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sc.Forward();
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sc.ForwardSetState(lastStateC);
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}
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if (sc.state == SCE_CSS_COMMENT)
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continue;
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if (sc.state == SCE_CSS_DOUBLESTRING || sc.state == SCE_CSS_SINGLESTRING) {
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if (sc.ch != (sc.state == SCE_CSS_DOUBLESTRING ? '\"' : '\''))
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continue;
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unsigned int i = sc.currentPos;
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while (i && styler[i-1] == '\\')
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i--;
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if ((sc.currentPos - i) % 2 == 1)
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continue;
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sc.ForwardSetState(lastStateS);
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}
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if (sc.state == SCE_CSS_OPERATOR) {
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if (op == ' ') {
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unsigned int i = startPos;
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op = styler.SafeGetCharAt(i-1);
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opPrev = styler.SafeGetCharAt(i-2);
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while (--i) {
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lastState = styler.StyleAt(i-1);
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if (lastState != SCE_CSS_OPERATOR && lastState != SCE_CSS_COMMENT)
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break;
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}
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}
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switch (op) {
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case '@':
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if (lastState == SCE_CSS_DEFAULT)
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sc.SetState(SCE_CSS_DIRECTIVE);
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break;
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case '>':
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case '+':
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if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
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lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
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sc.SetState(SCE_CSS_DEFAULT);
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break;
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case '[':
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if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
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lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
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sc.SetState(SCE_CSS_ATTRIBUTE);
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break;
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case ']':
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if (lastState == SCE_CSS_ATTRIBUTE)
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sc.SetState(SCE_CSS_TAG);
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break;
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case '{':
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if (lastState == SCE_CSS_MEDIA)
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sc.SetState(SCE_CSS_DEFAULT);
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else if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DIRECTIVE)
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sc.SetState(SCE_CSS_IDENTIFIER);
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break;
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case '}':
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if (lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_VALUE || lastState == SCE_CSS_IMPORTANT ||
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lastState == SCE_CSS_IDENTIFIER || lastState == SCE_CSS_IDENTIFIER2 || lastState == SCE_CSS_IDENTIFIER3)
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sc.SetState(SCE_CSS_DEFAULT);
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break;
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case '(':
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if (lastState == SCE_CSS_PSEUDOCLASS)
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sc.SetState(SCE_CSS_TAG);
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else if (lastState == SCE_CSS_EXTENDED_PSEUDOCLASS)
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sc.SetState(SCE_CSS_EXTENDED_PSEUDOCLASS);
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break;
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case ')':
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if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
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lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS ||
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lastState == SCE_CSS_PSEUDOELEMENT || lastState == SCE_CSS_EXTENDED_PSEUDOELEMENT)
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sc.SetState(SCE_CSS_TAG);
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break;
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case ':':
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if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
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lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS ||
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lastState == SCE_CSS_PSEUDOELEMENT || lastState == SCE_CSS_EXTENDED_PSEUDOELEMENT)
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sc.SetState(SCE_CSS_PSEUDOCLASS);
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else if (lastState == SCE_CSS_IDENTIFIER || lastState == SCE_CSS_IDENTIFIER2 ||
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lastState == SCE_CSS_IDENTIFIER3 || lastState == SCE_CSS_EXTENDED_IDENTIFIER ||
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lastState == SCE_CSS_UNKNOWN_IDENTIFIER)
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sc.SetState(SCE_CSS_VALUE);
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break;
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case '.':
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if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
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lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
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sc.SetState(SCE_CSS_CLASS);
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break;
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case '#':
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if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
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lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
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sc.SetState(SCE_CSS_ID);
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break;
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case ',':
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case '|':
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case '~':
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if (lastState == SCE_CSS_TAG)
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sc.SetState(SCE_CSS_DEFAULT);
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break;
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case ';':
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if (lastState == SCE_CSS_DIRECTIVE)
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sc.SetState(SCE_CSS_DEFAULT);
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else if (lastState == SCE_CSS_VALUE || lastState == SCE_CSS_IMPORTANT)
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sc.SetState(SCE_CSS_IDENTIFIER);
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break;
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case '!':
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if (lastState == SCE_CSS_VALUE)
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sc.SetState(SCE_CSS_IMPORTANT);
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break;
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}
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}
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if (IsAWordChar(sc.ch)) {
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if (sc.state == SCE_CSS_DEFAULT)
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sc.SetState(SCE_CSS_TAG);
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continue;
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}
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if (sc.ch == '*' && sc.state == SCE_CSS_DEFAULT) {
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sc.SetState(SCE_CSS_TAG);
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continue;
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}
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if (IsAWordChar(sc.chPrev) && (
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sc.state == SCE_CSS_IDENTIFIER || sc.state == SCE_CSS_IDENTIFIER2 ||
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sc.state == SCE_CSS_IDENTIFIER3 || sc.state == SCE_CSS_EXTENDED_IDENTIFIER ||
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sc.state == SCE_CSS_UNKNOWN_IDENTIFIER ||
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sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_PSEUDOELEMENT ||
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sc.state == SCE_CSS_EXTENDED_PSEUDOCLASS || sc.state == SCE_CSS_EXTENDED_PSEUDOELEMENT ||
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sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS ||
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sc.state == SCE_CSS_IMPORTANT ||
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sc.state == SCE_CSS_DIRECTIVE
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)) {
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char s[100];
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sc.GetCurrentLowered(s, sizeof(s));
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char *s2 = s;
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while (*s2 && !IsAWordChar(*s2))
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s2++;
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switch (sc.state) {
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case SCE_CSS_IDENTIFIER:
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case SCE_CSS_IDENTIFIER2:
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case SCE_CSS_IDENTIFIER3:
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case SCE_CSS_EXTENDED_IDENTIFIER:
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case SCE_CSS_UNKNOWN_IDENTIFIER:
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if (css1Props.InList(s2))
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sc.ChangeState(SCE_CSS_IDENTIFIER);
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else if (css2Props.InList(s2))
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sc.ChangeState(SCE_CSS_IDENTIFIER2);
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else if (css3Props.InList(s2))
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sc.ChangeState(SCE_CSS_IDENTIFIER3);
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else if (exProps.InList(s2))
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sc.ChangeState(SCE_CSS_EXTENDED_IDENTIFIER);
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else
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sc.ChangeState(SCE_CSS_UNKNOWN_IDENTIFIER);
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break;
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case SCE_CSS_PSEUDOCLASS:
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case SCE_CSS_PSEUDOELEMENT:
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case SCE_CSS_EXTENDED_PSEUDOCLASS:
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case SCE_CSS_EXTENDED_PSEUDOELEMENT:
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case SCE_CSS_UNKNOWN_PSEUDOCLASS:
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if (op == ':' && opPrev != ':' && pseudoClasses.InList(s2))
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sc.ChangeState(SCE_CSS_PSEUDOCLASS);
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else if (opPrev == ':' && pseudoElements.InList(s2))
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sc.ChangeState(SCE_CSS_PSEUDOELEMENT);
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else if ((op == ':' || (op == '(' && lastState == SCE_CSS_EXTENDED_PSEUDOCLASS)) && opPrev != ':' && exPseudoClasses.InList(s2))
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sc.ChangeState(SCE_CSS_EXTENDED_PSEUDOCLASS);
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else if (opPrev == ':' && exPseudoElements.InList(s2))
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sc.ChangeState(SCE_CSS_EXTENDED_PSEUDOELEMENT);
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else
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sc.ChangeState(SCE_CSS_UNKNOWN_PSEUDOCLASS);
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break;
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case SCE_CSS_IMPORTANT:
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if (strcmp(s2, "important") != 0)
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sc.ChangeState(SCE_CSS_VALUE);
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break;
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case SCE_CSS_DIRECTIVE:
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if (op == '@' && strcmp(s2, "media") == 0)
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sc.ChangeState(SCE_CSS_MEDIA);
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break;
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}
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}
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if (sc.ch != '.' && sc.ch != ':' && sc.ch != '#' && (
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sc.state == SCE_CSS_CLASS || sc.state == SCE_CSS_ID ||
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(sc.ch != '(' && sc.ch != ')' && ( /* This line of the condition makes it possible to extend pseudo-classes with parentheses */
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sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_PSEUDOELEMENT ||
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sc.state == SCE_CSS_EXTENDED_PSEUDOCLASS || sc.state == SCE_CSS_EXTENDED_PSEUDOELEMENT ||
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sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS
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))
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))
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sc.SetState(SCE_CSS_TAG);
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if (sc.Match('/', '*')) {
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lastStateC = sc.state;
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sc.SetState(SCE_CSS_COMMENT);
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sc.Forward();
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} else if ((sc.state == SCE_CSS_VALUE || sc.state == SCE_CSS_ATTRIBUTE)
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&& (sc.ch == '\"' || sc.ch == '\'')) {
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lastStateS = sc.state;
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sc.SetState((sc.ch == '\"' ? SCE_CSS_DOUBLESTRING : SCE_CSS_SINGLESTRING));
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} else if (IsCssOperator(sc.ch)
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&& (sc.state != SCE_CSS_ATTRIBUTE || sc.ch == ']')
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&& (sc.state != SCE_CSS_VALUE || sc.ch == ';' || sc.ch == '}' || sc.ch == '!')
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&& ((sc.state != SCE_CSS_DIRECTIVE && sc.state != SCE_CSS_MEDIA) || sc.ch == ';' || sc.ch == '{')
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) {
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if (sc.state != SCE_CSS_OPERATOR)
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lastState = sc.state;
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sc.SetState(SCE_CSS_OPERATOR);
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op = sc.ch;
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opPrev = sc.chPrev;
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}
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}
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sc.Complete();
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}
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static void FoldCSSDoc(unsigned int startPos, int length, int, WordList *[], Accessor &styler) {
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bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
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bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 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 levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
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int levelCurrent = levelPrev;
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char chNext = styler[startPos];
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bool inComment = (styler.StyleAt(startPos-1) == SCE_CSS_COMMENT);
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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 style = styler.StyleAt(i);
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bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
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if (foldComment) {
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if (!inComment && (style == SCE_CSS_COMMENT))
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levelCurrent++;
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else if (inComment && (style != SCE_CSS_COMMENT))
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levelCurrent--;
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inComment = (style == SCE_CSS_COMMENT);
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}
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if (style == SCE_CSS_OPERATOR) {
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if (ch == '{') {
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levelCurrent++;
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} else if (ch == '}') {
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levelCurrent--;
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}
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}
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if (atEOL) {
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int lev = levelPrev;
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if (visibleChars == 0 && foldCompact)
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lev |= SC_FOLDLEVELWHITEFLAG;
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if ((levelCurrent > levelPrev) && (visibleChars > 0))
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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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levelPrev = levelCurrent;
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visibleChars = 0;
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}
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if (!isspacechar(ch))
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visibleChars++;
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}
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// Fill in the real level of the next line, keeping the current flags as they will be filled in later
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int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
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styler.SetLevel(lineCurrent, levelPrev | flagsNext);
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}
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static const char * const cssWordListDesc[] = {
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"CSS1 Properties",
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"Pseudo-classes",
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"CSS2 Properties",
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"CSS3 Properties",
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"Pseudo-elements",
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"Browser-Specific CSS Properties",
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"Browser-Specific Pseudo-classes",
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"Browser-Specific Pseudo-elements",
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0
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};
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LexerModule lmCss(SCLEX_CSS, ColouriseCssDoc, "css", FoldCSSDoc, cssWordListDesc);
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