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authormensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
committermensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
commite44a7e37b6c7b5961adaffc62b9042b8d442938e (patch)
tree95b67c356e93163467db2451f2b8cce84ed5d582 /includes/js/dojox/highlight/_base.js
parenta62b9742ee5e28bcec6872d88f50f25b820914f6 (diff)
downloadsemanticscuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.gz
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New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
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+if(!dojo._hasResource["dojox.highlight._base"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.highlight._base"] = true;
+dojo.provide("dojox.highlight._base");
+
+//
+// dojox.highlight - syntax highlighting with language auto-detection
+// released under CLA by the Dojo Toolkit
+// orig BSD release available from: http://softwaremaniacs.org/soft/highlight/
+//
+
+(function(){
+ var dh = dojox.highlight,
+ C_NUMBER_RE = '\\b(0x[A-Za-z0-9]+|\\d+(\\.\\d+)?)';
+
+ // constants
+
+ dh.constants = {
+ IDENT_RE: '[a-zA-Z][a-zA-Z0-9_]*',
+ UNDERSCORE_IDENT_RE: '[a-zA-Z_][a-zA-Z0-9_]*',
+ NUMBER_RE: '\\b\\d+(\\.\\d+)?',
+ C_NUMBER_RE: C_NUMBER_RE,
+ // Common modes
+ APOS_STRING_MODE: {
+ className: 'string',
+ begin: '\'', end: '\'',
+ illegal: '\\n',
+ contains: ['escape'],
+ relevance: 0
+ },
+ QUOTE_STRING_MODE: {
+ className: 'string',
+ begin: '"',
+ end: '"',
+ illegal: '\\n',
+ contains: ['escape'],
+ relevance: 0
+ },
+ BACKSLASH_ESCAPE: {
+ className: 'escape',
+ begin: '\\\\.', end: '^',
+ relevance: 0
+ },
+ C_LINE_COMMENT_MODE: {
+ className: 'comment',
+ begin: '//', end: '$',
+ relevance: 0
+ },
+ C_BLOCK_COMMENT_MODE: {
+ className: 'comment',
+ begin: '/\\*', end: '\\*/'
+ },
+ HASH_COMMENT_MODE: {
+ className: 'comment',
+ begin: '#', end: '$'
+ },
+ C_NUMBER_MODE: {
+ className: 'number',
+ begin: C_NUMBER_RE, end: '^',
+ relevance: 0
+ }
+ };
+
+ // utilities
+
+ function esc(value){
+ return value.replace(/&/gm, '&amp;').replace(/</gm, '&lt;').replace(/>/gm, '&gt;');
+ }
+
+ function verifyText(block){
+ return dojo.every(block.childNodes, function(node){
+ return node.nodeType == 3 || String(node.nodeName).toLowerCase() == 'br';
+ });
+ }
+
+ function blockText(block){
+ var result = [];
+ dojo.forEach(block.childNodes, function(node){
+ if(node.nodeType == 3){
+ result.push(node.nodeValue);
+ }else if(String(node.nodeName).toLowerCase() == 'br'){
+ result.push("\n");
+ }else{
+ throw 'Complex markup';
+ }
+ });
+ return result.join("");
+ }
+
+ function buildKeywordGroups(mode){
+ if(!mode.keywordGroups){
+ for(var key in mode.keywords){
+ var kw = mode.keywords[key];
+ if(kw instanceof Object){ // dojo.isObject?
+ mode.keywordGroups = mode.keywords;
+ }else{
+ mode.keywordGroups = {keyword: mode.keywords};
+ }
+ break;
+ }
+ }
+ }
+
+ function buildKeywords(lang){
+ if(lang.defaultMode && lang.modes){
+ buildKeywordGroups(lang.defaultMode);
+ dojo.forEach(lang.modes, buildKeywordGroups);
+ }
+ }
+
+ // main object
+
+ var Highlighter = function(langName, textBlock){
+ // initialize the state
+ this.langName = langName;
+ this.lang = dh.languages[langName];
+ this.modes = [this.lang.defaultMode];
+ this.relevance = 0;
+ this.keywordCount = 0;
+ this.result = [];
+
+ // build resources lazily
+ if(!this.lang.defaultMode.illegalRe){
+ this.buildRes();
+ buildKeywords(this.lang);
+ }
+
+ // run the algorithm
+ try{
+ this.highlight(textBlock);
+ this.result = this.result.join("");
+ }catch(e){
+ if(e == 'Illegal'){
+ this.relevance = 0;
+ this.keywordCount = 0;
+ this.result = esc(textBlock);
+ }else{
+ throw e;
+ }
+ }
+ };
+
+ dojo.extend(Highlighter, {
+ buildRes: function(){
+ dojo.forEach(this.lang.modes, function(mode){
+ if(mode.begin){
+ mode.beginRe = this.langRe('^' + mode.begin);
+ }
+ if(mode.end){
+ mode.endRe = this.langRe('^' + mode.end);
+ }
+ if(mode.illegal){
+ mode.illegalRe = this.langRe('^(?:' + mode.illegal + ')');
+ }
+ }, this);
+ this.lang.defaultMode.illegalRe = this.langRe('^(?:' + this.lang.defaultMode.illegal + ')');
+ },
+
+ subMode: function(lexeme){
+ var classes = this.modes[this.modes.length - 1].contains;
+ if(classes){
+ var modes = this.lang.modes;
+ for(var i = 0; i < classes.length; ++i){
+ var className = classes[i];
+ for(var j = 0; j < modes.length; ++j){
+ var mode = modes[j];
+ if(mode.className == className && mode.beginRe.test(lexeme)){ return mode; }
+ }
+ }
+ }
+ return null;
+ },
+
+ endOfMode: function(lexeme){
+ for(var i = this.modes.length - 1; i >= 0; --i){
+ var mode = this.modes[i];
+ if(mode.end && mode.endRe.test(lexeme)){ return this.modes.length - i; }
+ if(!mode.endsWithParent){ break; }
+ }
+ return 0;
+ },
+
+ isIllegal: function(lexeme){
+ var illegalRe = this.modes[this.modes.length - 1].illegalRe;
+ return illegalRe && illegalRe.test(lexeme);
+ },
+
+
+ langRe: function(value, global){
+ var mode = 'm' + (this.lang.case_insensitive ? 'i' : '') + (global ? 'g' : '');
+ return new RegExp(value, mode);
+ },
+
+ buildTerminators: function(){
+ var mode = this.modes[this.modes.length - 1],
+ terminators = {};
+ if(mode.contains){
+ dojo.forEach(this.lang.modes, function(lmode){
+ if(dojo.indexOf(mode.contains, lmode.className) >= 0){
+ terminators[lmode.begin] = 1;
+ }
+ });
+ }
+ for(var i = this.modes.length - 1; i >= 0; --i){
+ var m = this.modes[i];
+ if(m.end){ terminators[m.end] = 1; }
+ if(!m.endsWithParent){ break; }
+ }
+ if(mode.illegal){ terminators[mode.illegal] = 1; }
+ var t = [];
+ for(i in terminators){ t.push(i); }
+ mode.terminatorsRe = this.langRe("(" + t.join("|") + ")");
+ },
+
+ eatModeChunk: function(value, index){
+ var mode = this.modes[this.modes.length - 1];
+
+ // create terminators lazily
+ if(!mode.terminatorsRe){
+ this.buildTerminators();
+ }
+
+ value = value.substr(index);
+ var match = mode.terminatorsRe.exec(value);
+ if(!match){
+ return {
+ buffer: value,
+ lexeme: "",
+ end: true
+ };
+ }
+ return {
+ buffer: match.index ? value.substr(0, match.index) : "",
+ lexeme: match[0],
+ end: false
+ };
+ },
+
+ keywordMatch: function(mode, match){
+ var matchStr = match[0];
+ if(this.lang.case_insensitive){ matchStr = matchStr.toLowerCase(); }
+ for(var className in mode.keywordGroups){
+ if(matchStr in mode.keywordGroups[className]){ return className; }
+ }
+ return "";
+ },
+
+ buildLexemes: function(mode){
+ var lexemes = {};
+ dojo.forEach(mode.lexems, function(lexeme){
+ lexemes[lexeme] = 1;
+ });
+ var t = [];
+ for(var i in lexemes){ t.push(i); }
+ mode.lexemsRe = this.langRe("(" + t.join("|") + ")", true);
+ },
+
+ processKeywords: function(buffer){
+ var mode = this.modes[this.modes.length - 1];
+ if(!mode.keywords || !mode.lexems){
+ return esc(buffer);
+ }
+
+ // create lexemes lazily
+ if(!mode.lexemsRe){
+ this.buildLexemes(mode);
+ }
+
+ mode.lexemsRe.lastIndex = 0;
+ var result = [], lastIndex = 0,
+ match = mode.lexemsRe.exec(buffer);
+ while(match){
+ result.push(esc(buffer.substr(lastIndex, match.index - lastIndex)));
+ var keywordM = this.keywordMatch(mode, match);
+ if(keywordM){
+ ++this.keywordCount;
+ result.push('<span class="'+ keywordM +'">' + esc(match[0]) + '</span>');
+ }else{
+ result.push(esc(match[0]));
+ }
+ lastIndex = mode.lexemsRe.lastIndex;
+ match = mode.lexemsRe.exec(buffer);
+ }
+ result.push(esc(buffer.substr(lastIndex, buffer.length - lastIndex)));
+ return result.join("");
+ },
+
+ processModeInfo: function(buffer, lexeme, end) {
+ var mode = this.modes[this.modes.length - 1];
+ if(end){
+ this.result.push(this.processKeywords(mode.buffer + buffer));
+ return;
+ }
+ if(this.isIllegal(lexeme)){ throw 'Illegal'; }
+ var newMode = this.subMode(lexeme);
+ if(newMode){
+ mode.buffer += buffer;
+ this.result.push(this.processKeywords(mode.buffer));
+ if(newMode.excludeBegin){
+ this.result.push(lexeme + '<span class="' + newMode.className + '">');
+ newMode.buffer = '';
+ }else{
+ this.result.push('<span class="' + newMode.className + '">');
+ newMode.buffer = lexeme;
+ }
+ this.modes.push(newMode);
+ this.relevance += typeof newMode.relevance == "number" ? newMode.relevance : 1;
+ return;
+ }
+ var endLevel = this.endOfMode(lexeme);
+ if(endLevel){
+ mode.buffer += buffer;
+ if(mode.excludeEnd){
+ this.result.push(this.processKeywords(mode.buffer) + '</span>' + lexeme);
+ }else{
+ this.result.push(this.processKeywords(mode.buffer + lexeme) + '</span>');
+ }
+ while(endLevel > 1){
+ this.result.push('</span>');
+ --endLevel;
+ this.modes.pop();
+ }
+ this.modes.pop();
+ this.modes[this.modes.length - 1].buffer = '';
+ return;
+ }
+ },
+
+ highlight: function(value){
+ var index = 0;
+ this.lang.defaultMode.buffer = '';
+ do{
+ var modeInfo = this.eatModeChunk(value, index);
+ this.processModeInfo(modeInfo.buffer, modeInfo.lexeme, modeInfo.end);
+ index += modeInfo.buffer.length + modeInfo.lexeme.length;
+ }while(!modeInfo.end);
+ if(this.modes.length > 1){
+ throw 'Illegal';
+ }
+ }
+ });
+
+ // more utilities
+
+ function replaceText(node, className, text){
+ if(String(node.tagName).toLowerCase() == "code" && String(node.parentNode.tagName).toLowerCase() == "pre"){
+ // See these 4 lines? This is IE's notion of "node.innerHTML = text". Love this browser :-/
+ var container = document.createElement('div'),
+ environment = node.parentNode.parentNode;
+ container.innerHTML = '<pre><code class="' + className + '">' + text + '</code></pre>';
+ environment.replaceChild(container.firstChild, node.parentNode);
+ }else{
+ node.className = className;
+ node.innerHTML = text;
+ }
+ }
+
+ function highlightLanguage(block, lang){
+ var highlight = new Highlighter(lang, blockText(block));
+ replaceText(block, block.className, highlight.result);
+ }
+
+ function highlightAuto(block){
+ var result = "", langName = "", bestRelevance = 2,
+ textBlock = blockText(block);
+ for(var key in dh.languages){
+ if(!dh.languages[key].defaultMode){ continue; } // skip internal members
+ var highlight = new Highlighter(key, textBlock),
+ relevance = highlight.keywordCount + highlight.relevance;
+ if(!result || relevance > relevanceMax){
+ relevanceMax = relevance;
+ result = highlight.result;
+ langName = highlight.langName;
+ }
+ }
+ if(result){
+ replaceText(block, langName, result);
+ }
+ }
+
+ // the public API
+
+ dh.init = function(/* DomNode */ block){
+ // summary: the main (only required) public API. highlight a node.
+ if(dojo.hasClass(block,"no-highlight")){ return; }
+ if(!verifyText(block)){ return; }
+
+ var classes = block.className.split(/\s+/),
+ flag = dojo.some(classes, function(className){
+ if(className.charAt(0) != "_" && dh.languages[className]){
+ highlightLanguage(block, className);
+ return true; // stop iterations
+ }
+ return false; // continue iterations
+ });
+ if(!flag){
+ highlightAuto(block);
+ }
+ };
+
+ // pseudo object for markup creation
+ dh.Code = function(params, node){
+ dh.init(node);
+ };
+})();
+
+}