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303 lines
9.8 KiB
303 lines
9.8 KiB
// 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 <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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static inline bool IsAWordChar(const unsigned int ch) { |
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return (isalnum(ch) || ch == '-' || ch == '_' || ch >= 161); // _ is not in fact correct CSS word-character |
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} |
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inline bool IsCssOperator(const char ch) { |
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if (!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 &keywords = *keywordlists[0]; |
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WordList &pseudoClasses = *keywordlists[1]; |
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WordList &keywords2 = *keywordlists[2]; |
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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 op = ' '; // 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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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(SCE_CSS_VALUE); |
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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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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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if (lastState == SCE_CSS_DEFAULT) |
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sc.SetState(SCE_CSS_TAG); |
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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_PSEUDOCLASS || lastState == SCE_CSS_CLASS |
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|| lastState == SCE_CSS_ID || 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_PSEUDOCLASS || lastState == SCE_CSS_DEFAULT || |
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lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID || 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_DIRECTIVE) |
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sc.SetState(SCE_CSS_DEFAULT); |
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else if (lastState == SCE_CSS_TAG) |
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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) |
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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_PSEUDOCLASS || lastState == SCE_CSS_DEFAULT || |
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lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS) |
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sc.SetState(SCE_CSS_PSEUDOCLASS); |
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else if (lastState == SCE_CSS_IDENTIFIER || lastState == SCE_CSS_IDENTIFIER2 || 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_PSEUDOCLASS || lastState == SCE_CSS_DEFAULT || |
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lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID || 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_PSEUDOCLASS || lastState == SCE_CSS_DEFAULT || |
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lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID || 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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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 (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_UNKNOWN_IDENTIFIER |
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|| sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS |
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|| sc.state == SCE_CSS_IMPORTANT |
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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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if (!keywords.InList(s2)) { |
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if (keywords2.InList(s2)) { |
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sc.ChangeState(SCE_CSS_IDENTIFIER2); |
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} else { |
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sc.ChangeState(SCE_CSS_UNKNOWN_IDENTIFIER); |
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} |
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} |
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break; |
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case SCE_CSS_UNKNOWN_IDENTIFIER: |
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if (keywords.InList(s2)) |
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sc.ChangeState(SCE_CSS_IDENTIFIER); |
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else if (keywords2.InList(s2)) |
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sc.ChangeState(SCE_CSS_IDENTIFIER2); |
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break; |
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case SCE_CSS_PSEUDOCLASS: |
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if (!pseudoClasses.InList(s2)) |
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sc.ChangeState(SCE_CSS_UNKNOWN_PSEUDOCLASS); |
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break; |
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case SCE_CSS_UNKNOWN_PSEUDOCLASS: |
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if (pseudoClasses.InList(s2)) |
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sc.ChangeState(SCE_CSS_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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} |
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} |
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if (sc.ch != '.' && sc.ch != ':' && sc.ch != '#' && (sc.state == SCE_CSS_CLASS || sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS || sc.state == SCE_CSS_ID)) |
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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.ch == '\"' || sc.ch == '\'')) { |
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sc.SetState((sc.ch == '\"' ? SCE_CSS_DOUBLESTRING : SCE_CSS_SINGLESTRING)); |
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} else if (IsCssOperator(static_cast<char>(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.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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} |
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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 Keywords", |
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"Pseudo classes", |
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"CSS2 Keywords", |
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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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