diff options
Diffstat (limited to 'scintilla/src/LexCSS.cxx')
| -rw-r--r-- | scintilla/src/LexCSS.cxx | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/scintilla/src/LexCSS.cxx b/scintilla/src/LexCSS.cxx new file mode 100644 index 0000000..9e4d1d7 --- /dev/null +++ b/scintilla/src/LexCSS.cxx @@ -0,0 +1,371 @@ +// 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"
+
+#ifdef SCI_NAMESPACE
+using namespace Scintilla;
+#endif
+
+
+static inline bool IsAWordChar(const unsigned int ch) {
+ /* FIXME:
+ * The CSS spec allows "ISO 10646 characters U+00A1 and higher" to be treated as word chars.
+ * Unfortunately, we are only getting string bytes here, and not full unicode characters. We cannot guarantee
+ * that our byte is between U+0080 - U+00A0 (to return false), so we have to allow all characters U+0080 and higher
+ */
+ return ch >= 0x80 || isalnum(ch) || ch == '-' || ch == '_';
+}
+
+inline bool IsCssOperator(const int ch) {
+ if (!((ch < 0x80) && 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 &css1Props = *keywordlists[0];
+ WordList &pseudoClasses = *keywordlists[1];
+ WordList &css2Props = *keywordlists[2];
+ WordList &css3Props = *keywordlists[3];
+ WordList &pseudoElements = *keywordlists[4];
+ WordList &exProps = *keywordlists[5];
+ WordList &exPseudoClasses = *keywordlists[6];
+ WordList &exPseudoElements = *keywordlists[7];
+
+ StyleContext sc(startPos, length, initStyle, styler);
+
+ int lastState = -1; // before operator
+ int lastStateC = -1; // before comment
+ int lastStateS = -1; // before single-quoted/double-quoted string
+ int op = ' '; // last operator
+ int opPrev = ' '; // 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);
+ opPrev = styler.SafeGetCharAt(i-2);
+ 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(lastStateS);
+ }
+
+ if (sc.state == SCE_CSS_OPERATOR) {
+ if (op == ' ') {
+ unsigned int i = startPos;
+ op = styler.SafeGetCharAt(i-1);
+ opPrev = styler.SafeGetCharAt(i-2);
+ 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 '>':
+ case '+':
+ if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
+ lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
+ sc.SetState(SCE_CSS_DEFAULT);
+ break;
+ case '[':
+ if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
+ lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || 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_MEDIA)
+ sc.SetState(SCE_CSS_DEFAULT);
+ else if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DIRECTIVE)
+ 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 || lastState == SCE_CSS_IDENTIFIER3)
+ sc.SetState(SCE_CSS_DEFAULT);
+ break;
+ case '(':
+ if (lastState == SCE_CSS_PSEUDOCLASS)
+ sc.SetState(SCE_CSS_TAG);
+ else if (lastState == SCE_CSS_EXTENDED_PSEUDOCLASS)
+ sc.SetState(SCE_CSS_EXTENDED_PSEUDOCLASS);
+ break;
+ case ')':
+ if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
+ lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS ||
+ lastState == SCE_CSS_PSEUDOELEMENT || lastState == SCE_CSS_EXTENDED_PSEUDOELEMENT)
+ sc.SetState(SCE_CSS_TAG);
+ break;
+ case ':':
+ if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
+ lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS ||
+ lastState == SCE_CSS_PSEUDOELEMENT || lastState == SCE_CSS_EXTENDED_PSEUDOELEMENT)
+ sc.SetState(SCE_CSS_PSEUDOCLASS);
+ else if (lastState == SCE_CSS_IDENTIFIER || lastState == SCE_CSS_IDENTIFIER2 ||
+ lastState == SCE_CSS_IDENTIFIER3 || lastState == SCE_CSS_EXTENDED_IDENTIFIER ||
+ lastState == SCE_CSS_UNKNOWN_IDENTIFIER)
+ sc.SetState(SCE_CSS_VALUE);
+ break;
+ case '.':
+ if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
+ lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
+ sc.SetState(SCE_CSS_CLASS);
+ break;
+ case '#':
+ if (lastState == SCE_CSS_TAG || lastState == SCE_CSS_DEFAULT || lastState == SCE_CSS_CLASS || lastState == SCE_CSS_ID ||
+ lastState == SCE_CSS_PSEUDOCLASS || lastState == SCE_CSS_EXTENDED_PSEUDOCLASS || lastState == SCE_CSS_UNKNOWN_PSEUDOCLASS)
+ sc.SetState(SCE_CSS_ID);
+ break;
+ case ',':
+ case '|':
+ 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 (sc.ch == '*' && 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_IDENTIFIER3 || sc.state == SCE_CSS_EXTENDED_IDENTIFIER ||
+ sc.state == SCE_CSS_UNKNOWN_IDENTIFIER ||
+ sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_PSEUDOELEMENT ||
+ sc.state == SCE_CSS_EXTENDED_PSEUDOCLASS || sc.state == SCE_CSS_EXTENDED_PSEUDOELEMENT ||
+ sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS ||
+ sc.state == SCE_CSS_IMPORTANT ||
+ sc.state == SCE_CSS_DIRECTIVE
+ )) {
+ char s[100];
+ sc.GetCurrentLowered(s, sizeof(s));
+ char *s2 = s;
+ while (*s2 && !IsAWordChar(*s2))
+ s2++;
+ switch (sc.state) {
+ case SCE_CSS_IDENTIFIER:
+ case SCE_CSS_IDENTIFIER2:
+ case SCE_CSS_IDENTIFIER3:
+ case SCE_CSS_EXTENDED_IDENTIFIER:
+ case SCE_CSS_UNKNOWN_IDENTIFIER:
+ if (css1Props.InList(s2))
+ sc.ChangeState(SCE_CSS_IDENTIFIER);
+ else if (css2Props.InList(s2))
+ sc.ChangeState(SCE_CSS_IDENTIFIER2);
+ else if (css3Props.InList(s2))
+ sc.ChangeState(SCE_CSS_IDENTIFIER3);
+ else if (exProps.InList(s2))
+ sc.ChangeState(SCE_CSS_EXTENDED_IDENTIFIER);
+ else
+ sc.ChangeState(SCE_CSS_UNKNOWN_IDENTIFIER);
+ break;
+ case SCE_CSS_PSEUDOCLASS:
+ case SCE_CSS_PSEUDOELEMENT:
+ case SCE_CSS_EXTENDED_PSEUDOCLASS:
+ case SCE_CSS_EXTENDED_PSEUDOELEMENT:
+ case SCE_CSS_UNKNOWN_PSEUDOCLASS:
+ if (op == ':' && opPrev != ':' && pseudoClasses.InList(s2))
+ sc.ChangeState(SCE_CSS_PSEUDOCLASS);
+ else if (opPrev == ':' && pseudoElements.InList(s2))
+ sc.ChangeState(SCE_CSS_PSEUDOELEMENT);
+ else if ((op == ':' || (op == '(' && lastState == SCE_CSS_EXTENDED_PSEUDOCLASS)) && opPrev != ':' && exPseudoClasses.InList(s2))
+ sc.ChangeState(SCE_CSS_EXTENDED_PSEUDOCLASS);
+ else if (opPrev == ':' && exPseudoElements.InList(s2))
+ sc.ChangeState(SCE_CSS_EXTENDED_PSEUDOELEMENT);
+ else
+ sc.ChangeState(SCE_CSS_UNKNOWN_PSEUDOCLASS);
+ break;
+ case SCE_CSS_IMPORTANT:
+ if (strcmp(s2, "important") != 0)
+ sc.ChangeState(SCE_CSS_VALUE);
+ break;
+ case SCE_CSS_DIRECTIVE:
+ if (op == '@' && strcmp(s2, "media") == 0)
+ sc.ChangeState(SCE_CSS_MEDIA);
+ break;
+ }
+ }
+
+ if (sc.ch != '.' && sc.ch != ':' && sc.ch != '#' && (
+ sc.state == SCE_CSS_CLASS || sc.state == SCE_CSS_ID ||
+ (sc.ch != '(' && sc.ch != ')' && ( /* This line of the condition makes it possible to extend pseudo-classes with parentheses */
+ sc.state == SCE_CSS_PSEUDOCLASS || sc.state == SCE_CSS_PSEUDOELEMENT ||
+ sc.state == SCE_CSS_EXTENDED_PSEUDOCLASS || sc.state == SCE_CSS_EXTENDED_PSEUDOELEMENT ||
+ sc.state == SCE_CSS_UNKNOWN_PSEUDOCLASS
+ ))
+ ))
+ 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.state == SCE_CSS_ATTRIBUTE)
+ && (sc.ch == '\"' || sc.ch == '\'')) {
+ lastStateS = sc.state;
+ sc.SetState((sc.ch == '\"' ? SCE_CSS_DOUBLESTRING : SCE_CSS_SINGLESTRING));
+ } else if (IsCssOperator(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.state != SCE_CSS_MEDIA) || sc.ch == ';' || sc.ch == '{')
+ ) {
+ if (sc.state != SCE_CSS_OPERATOR)
+ lastState = sc.state;
+ sc.SetState(SCE_CSS_OPERATOR);
+ op = sc.ch;
+ opPrev = sc.chPrev;
+ }
+ }
+
+ 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 Properties",
+ "Pseudo-classes",
+ "CSS2 Properties",
+ "CSS3 Properties",
+ "Pseudo-elements",
+ "Browser-Specific CSS Properties",
+ "Browser-Specific Pseudo-classes",
+ "Browser-Specific Pseudo-elements",
+ 0
+};
+
+LexerModule lmCss(SCLEX_CSS, ColouriseCssDoc, "css", FoldCSSDoc, cssWordListDesc);
|