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Diffstat (limited to 'src/LexCSS.cpp')
| -rwxr-xr-x | src/LexCSS.cpp | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/src/LexCSS.cpp b/src/LexCSS.cpp new file mode 100755 index 0000000..963a7b3 --- /dev/null +++ b/src/LexCSS.cpp @@ -0,0 +1,303 @@ +// Scintilla source code edit control +/** @file LexCSS.cxx + ** Lexer for Cascading Style Sheets + ** Written by Jakub Vrána + ** Improved by Philippe Lhoste (CSS2) + **/ +// Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org> +// The License.txt file describes the conditions under which this software may be distributed. + +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <stdio.h> +#include <stdarg.h> + +#include "Platform.h" + +#include "PropSet.h" +#include "Accessor.h" +#include "StyleContext.h" +#include "KeyWords.h" +#include "Scintilla.h" +#include "SciLexer.h" + + +static inline bool IsAWordChar(const unsigned int ch) { + return (isalnum(ch) || ch == '-' || ch == '_' || ch >= 161); // _ is not in fact correct CSS word-character +} + +inline bool IsCssOperator(const char ch) { + if (!isalnum(ch) && + (ch == '{' || ch == '}' || ch == ':' || ch == ',' || ch == ';' || + ch == '.' || ch == '#' || ch == '!' || ch == '@' || + /* CSS2 */ + ch == '*' || ch == '>' || ch == '+' || ch == '=' || ch == '~' || ch == '|' || + ch == '[' || ch == ']' || ch == '(' || ch == ')')) { + return true; + } + return false; +} + +static void ColouriseCssDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[], Accessor &styler) { + WordList &keywords = *keywordlists[0]; + WordList &pseudoClasses = *keywordlists[1]; + WordList &keywords2 = *keywordlists[2]; + + StyleContext sc(startPos, length, initStyle, styler); + + int lastState = -1; // before operator + int lastStateC = -1; // before comment + int op = ' '; // last operator + + for (; sc.More(); sc.Forward()) { + if (sc.state == SCE_CSS_COMMENT && sc.Match('*', '/')) { + if (lastStateC == -1) { + // backtrack to get last state: + // comments are like whitespace, so we must return to the previous state + unsigned int i = startPos; + for (; i > 0; i--) { + if ((lastStateC = styler.StyleAt(i-1)) != SCE_CSS_COMMENT) { + if (lastStateC == SCE_CSS_OPERATOR) { + op = styler.SafeGetCharAt(i-1); + while (--i) { + lastState = styler.StyleAt(i-1); + if (lastState != SCE_CSS_OPERATOR && lastState != SCE_CSS_COMMENT) + break; + } + if (i == 0) + lastState = SCE_CSS_DEFAULT; + } + break; + } + } + if (i == 0) + lastStateC = SCE_CSS_DEFAULT; + } + sc.Forward(); + sc.ForwardSetState(lastStateC); + } + + if (sc.state == SCE_CSS_COMMENT) + continue; + + if (sc.state == SCE_CSS_DOUBLESTRING || sc.state == SCE_CSS_SINGLESTRING) { + if (sc.ch != (sc.state == SCE_CSS_DOUBLESTRING ? '\"' : '\'')) + continue; + unsigned int i = sc.currentPos; + while (i && styler[i-1] == '\\') + i--; + if ((sc.currentPos - i) % 2 == 1) + continue; + sc.ForwardSetState(SCE_CSS_VALUE); + } + + if (sc.state == SCE_CSS_OPERATOR) { + if (op == ' ') { + unsigned int i = startPos; + op = styler.SafeGetCharAt(i-1); + while (--i) { + lastState = styler.StyleAt(i-1); + if (lastState != SCE_CSS_OPERATOR && lastState != SCE_CSS_COMMENT) + break; + } + } + switch (op) { + case '@': + if (lastState == SCE_CSS_DEFAULT) + sc.SetState(SCE_CSS_DIRECTIVE); + break; + case '*': + if (lastState == SCE_CSS_DEFAULT) + sc.SetState(SCE_CSS_TAG); + break; + case '>': + case '+': + if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_CLASS + || lastState == SCE_CSS_ID || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS) + sc.SetState(SCE_CSS_DEFAULT); + break; + case '[': + if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_DEFAULT || + lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS) + sc.SetState(SCE_CSS_ATTRIBUTE); + break; + case ']': + if (lastState == SCE_CSS_ATTRIBUTE) + sc.SetState(SCE_CSS_TAG); + break; + case '{': + if (lastState == SCE_CSS_DIRECTIVE) + sc.SetState(SCE_CSS_DEFAULT); + else if (lastState == SCE_CSS_TAG) + sc.SetState(SCE_CSS_IDENTIFIER); + break; + case '}': + if (lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_VALUE || lastState == SCE_CSS_IMPORTANT || + lastState == SCE_CSS_IDENTIFIER || lastState == SCE_CSS_IDENTIFIER2) + sc.SetState(SCE_CSS_DEFAULT); + break; + case ':': + if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_DEFAULT || + lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS) + sc.SetState(SCE_CSS_PSEUDOCLASS); + else if (lastState == SCE_CSS_IDENTIFIER || lastState == SCE_CSS_IDENTIFIER2 || lastState == SCE_CSS_UNKNOWN_IDENTIFIER) + sc.SetState(SCE_CSS_VALUE); + break; + case '.': + if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_DEFAULT || + lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS) + sc.SetState(SCE_CSS_CLASS); + break; + case '#': + if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_DEFAULT || + lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS) + sc.SetState(SCE_CSS_ID); + break; + case ',': + if (lastState == SCE_CSS_TAG) + sc.SetState(SCE_CSS_DEFAULT); + break; + case ';': + if (lastState == SCE_CSS_DIRECTIVE) + sc.SetState(SCE_CSS_DEFAULT); + else if (lastState == SCE_CSS_VALUE || lastState == SCE_CSS_IMPORTANT) + sc.SetState(SCE_CSS_IDENTIFIER); + break; + case '!': + if (lastState == SCE_CSS_VALUE) + sc.SetState(SCE_CSS_IMPORTANT); + break; + } + } + + if (IsAWordChar(sc.ch)) { + if (sc.state == SCE_CSS_DEFAULT) + sc.SetState(SCE_CSS_TAG); + continue; + } + + if (IsAWordChar(sc.chPrev) && ( + sc.state == SCE_CSS_IDENTIFIER || sc.state == SCE_CSS_IDENTIFIER2 + || sc.state == SCE_CSS_UNKNOWN_IDENTIFIER + || sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS + || sc.state == SCE_CSS_IMPORTANT + )) { + char s[100]; + sc.GetCurrentLowered(s, sizeof(s)); + char *s2 = s; + while (*s2 && !IsAWordChar(*s2)) + s2++; + switch (sc.state) { + case SCE_CSS_IDENTIFIER: + if (!keywords.InList(s2)) { + if (keywords2.InList(s2)) { + sc.ChangeState(SCE_CSS_IDENTIFIER2); + } else { + sc.ChangeState(SCE_CSS_UNKNOWN_IDENTIFIER); + } + } + break; + case SCE_CSS_UNKNOWN_IDENTIFIER: + if (keywords.InList(s2)) + sc.ChangeState(SCE_CSS_IDENTIFIER); + else if (keywords2.InList(s2)) + sc.ChangeState(SCE_CSS_IDENTIFIER2); + break; + case SCE_CSS_PSEUDOCLASS: + if (!pseudoClasses.InList(s2)) + sc.ChangeState(SCE_CSS_UNKNOWN_PSEUDOCLASS); + break; + case SCE_CSS_UNKNOWN_PSEUDOCLASS: + if (pseudoClasses.InList(s2)) + sc.ChangeState(SCE_CSS_PSEUDOCLASS); + break; + case SCE_CSS_IMPORTANT: + if (strcmp(s2, "important") != 0) + sc.ChangeState(SCE_CSS_VALUE); + break; + } + } + + 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)) + sc.SetState(SCE_CSS_TAG); + + if (sc.Match('/', '*')) { + lastStateC = sc.state; + sc.SetState(SCE_CSS_COMMENT); + sc.Forward(); + } else if (sc.state == SCE_CSS_VALUE && (sc.ch == '\"' || sc.ch == '\'')) { + sc.SetState((sc.ch == '\"' ? SCE_CSS_DOUBLESTRING : SCE_CSS_SINGLESTRING)); + } else if (IsCssOperator(static_cast<char>(sc.ch)) + && (sc.state != SCE_CSS_ATTRIBUTE || sc.ch == ']') + && (sc.state != SCE_CSS_VALUE || sc.ch == ';' || sc.ch == '}' || sc.ch == '!') + && (sc.state != SCE_CSS_DIRECTIVE || sc.ch == ';' || sc.ch == '{') + ) { + if (sc.state != SCE_CSS_OPERATOR) + lastState = sc.state; + sc.SetState(SCE_CSS_OPERATOR); + op = sc.ch; + } + } + + sc.Complete(); +} + +static void FoldCSSDoc(unsigned int startPos, int length, int, WordList *[], Accessor &styler) { + bool foldComment = styler.GetPropertyInt("fold.comment") != 0; + bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0; + unsigned int endPos = startPos + length; + int visibleChars = 0; + int lineCurrent = styler.GetLine(startPos); + int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK; + int levelCurrent = levelPrev; + char chNext = styler[startPos]; + bool inComment = (styler.StyleAt(startPos-1) == SCE_CSS_COMMENT); + for (unsigned int i = startPos; i < endPos; i++) { + char ch = chNext; + chNext = styler.SafeGetCharAt(i + 1); + int style = styler.StyleAt(i); + bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n'); + if (foldComment) { + if (!inComment && (style == SCE_CSS_COMMENT)) + levelCurrent++; + else if (inComment && (style != SCE_CSS_COMMENT)) + levelCurrent--; + inComment = (style == SCE_CSS_COMMENT); + } + if (style == SCE_CSS_OPERATOR) { + if (ch == '{') { + levelCurrent++; + } else if (ch == '}') { + levelCurrent--; + } + } + if (atEOL) { + int lev = levelPrev; + if (visibleChars == 0 && foldCompact) + lev |= SC_FOLDLEVELWHITEFLAG; + if ((levelCurrent > levelPrev) && (visibleChars > 0)) + lev |= SC_FOLDLEVELHEADERFLAG; + if (lev != styler.LevelAt(lineCurrent)) { + styler.SetLevel(lineCurrent, lev); + } + lineCurrent++; + levelPrev = levelCurrent; + visibleChars = 0; + } + if (!isspacechar(ch)) + visibleChars++; + } + // Fill in the real level of the next line, keeping the current flags as they will be filled in later + int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK; + styler.SetLevel(lineCurrent, levelPrev | flagsNext); +} + +static const char * const cssWordListDesc[] = { + "CSS1 Keywords", + "Pseudo classes", + "CSS2 Keywords", + 0 +}; + +LexerModule lmCss(SCLEX_CSS, ColouriseCssDoc, "css", FoldCSSDoc, cssWordListDesc); |