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   1  /*
   2   * CodePress - Real Time Syntax Highlighting Editor written in JavaScript - http://codepress.org/
   3   * 
   4   * Copyright (C) 2007 Fernando M.A.d.S. <fermads@gmail.com>
   5   *
   6   * Contributors :
   7   *
   8   *     Michael Hurni <michael.hurni@gmail.com>
   9   *
  10   * This program is free software; you can redistribute it and/or modify it under the terms of the 
  11   * GNU Lesser General Public License as published by the Free Software Foundation.
  12   * 
  13   * Read the full licence: http://www.opensource.org/licenses/lgpl-license.php
  14   */
  15  
  16  
  17  CodePress = {
  18      scrolling : false,
  19      autocomplete : true,
  20  
  21      // set initial vars and start sh
  22      initialize : function() {
  23          if(typeof(editor)=='undefined' && !arguments[0]) return;
  24          chars = '|32|46|62|'; // charcodes that trigger syntax highlighting
  25          cc = '\u2009'; // control char
  26          editor = document.getElementsByTagName('body')[0];
  27          document.designMode = 'on';
  28          document.addEventListener('keyup', this.keyHandler, true);
  29          window.addEventListener('scroll', function() { if(!CodePress.scrolling) CodePress.syntaxHighlight('scroll') }, false);
  30          completeChars = this.getCompleteChars();
  31  //        CodePress.syntaxHighlight('init');
  32      },
  33  
  34      // treat key bindings
  35      keyHandler : function(evt) {
  36          keyCode = evt.keyCode;    
  37          charCode = evt.charCode;
  38  
  39          if((evt.ctrlKey || evt.metaKey) && evt.shiftKey && charCode!=90)  { // shortcuts = ctrl||appleKey+shift+key!=z(undo) 
  40              CodePress.shortcuts(charCode?charCode:keyCode);
  41          }
  42          else if(completeChars.indexOf('|'+String.fromCharCode(charCode)+'|')!=-1 && CodePress.autocomplete) { // auto complete
  43              CodePress.complete(String.fromCharCode(charCode));
  44          }
  45          else if(chars.indexOf('|'+charCode+'|')!=-1||keyCode==13) { // syntax highlighting
  46               CodePress.syntaxHighlight('generic');
  47          }
  48          else if(keyCode==9 || evt.tabKey) {  // snippets activation (tab)
  49              CodePress.snippets(evt);
  50          }
  51          else if(keyCode==46||keyCode==8) { // save to history when delete or backspace pressed
  52               CodePress.actions.history[CodePress.actions.next()] = editor.innerHTML;
  53          }
  54          else if((charCode==122||charCode==121||charCode==90) && evt.ctrlKey) { // undo and redo
  55              (charCode==121||evt.shiftKey) ? CodePress.actions.redo() :  CodePress.actions.undo(); 
  56              evt.preventDefault();
  57          }
  58          else if(keyCode==86 && evt.ctrlKey)  { // paste
  59              // TODO: pasted text should be parsed and highlighted
  60          }
  61      },
  62  
  63      // put cursor back to its original position after every parsing
  64      findString : function() {
  65          var sel = window.getSelection();
  66          var range = window.document.createRange();
  67          var span = window.document.getElementsByTagName('span')[0];
  68              
  69          range.selectNode(span);
  70          sel.removeAllRanges();
  71          sel.addRange(range);
  72          span.parentNode.removeChild(span);
  73          //if(self.find(cc))
  74          //window.getSelection().getRangeAt(0).deleteContents();
  75      },
  76      
  77      // split big files, highlighting parts of it
  78      split : function(code,flag) {
  79          if(flag=='scroll') {
  80              this.scrolling = true;
  81              return code;
  82          }
  83          else {
  84              this.scrolling = false;
  85              mid = code.indexOf('<SPAN>');
  86              if(mid-2000<0) {ini=0;end=4000;}
  87              else if(mid+2000>code.length) {ini=code.length-4000;end=code.length;}
  88              else {ini=mid-2000;end=mid+2000;}
  89              code = code.substring(ini,end);
  90              return code;
  91          }
  92      },
  93      
  94      // syntax highlighting parser
  95      syntaxHighlight : function(flag) {
  96          //if(document.designMode=='off') document.designMode='on'
  97          if(flag!='init') {
  98              var span = document.createElement('span');
  99              window.getSelection().getRangeAt(0).insertNode(span);
 100          }
 101  
 102          o = editor.innerHTML;
 103  //        o = o.replace(/<br>/g,'\r\n');
 104  //        o = o.replace(/<(b|i|s|u|a|em|tt|ins|big|cite|strong)?>/g,'');
 105          //alert(o)
 106          o = o.replace(/<(?!span|\/span|br).*?>/gi,'');
 107  //        alert(o)
 108  //        x = o;
 109          x = z = this.split(o,flag);
 110          //alert(z)
 111  //        x = x.replace(/\r\n/g,'<br>');
 112          x = x.replace(/\t/g, '        ');
 113  
 114  
 115          if(arguments[1]&&arguments[2]) x = x.replace(arguments[1],arguments[2]);
 116      
 117          for(i=0;i<Language.syntax.length;i++) 
 118              x = x.replace(Language.syntax[i].input,Language.syntax[i].output);
 119  
 120          editor.innerHTML = this.actions.history[this.actions.next()] = (flag=='scroll') ? x : o.split(z).join(x); 
 121  
 122          if(flag!='init') this.findString();
 123      },
 124      
 125      getLastWord : function() {
 126          var rangeAndCaret = CodePress.getRangeAndCaret();
 127          words = rangeAndCaret[0].substring(rangeAndCaret[1]-40,rangeAndCaret[1]);
 128          words = words.replace(/[\s\n\r\);\W]/g,'\n').split('\n');
 129          return words[words.length-1].replace(/[\W]/gi,'').toLowerCase();
 130      }, 
 131      
 132      snippets : function(evt) {
 133          var snippets = Language.snippets;    
 134          var trigger = this.getLastWord();
 135          for (var i=0; i<snippets.length; i++) {
 136              if(snippets[i].input == trigger) {
 137                  var content = snippets[i].output.replace(/</g,'&lt;');
 138                  content = content.replace(/>/g,'&gt;');
 139                  if(content.indexOf('$0')<0) content += cc;
 140                  else content = content.replace(/\$0/,cc);
 141                  content = content.replace(/\n/g,'<br>');
 142                  var pattern = new RegExp(trigger+cc,'gi');
 143                  evt.preventDefault(); // prevent the tab key from being added
 144                  this.syntaxHighlight('snippets',pattern,content);
 145              }
 146          }
 147      },
 148      
 149      readOnly : function() {
 150          document.designMode = (arguments[0]) ? 'off' : 'on';
 151      },
 152  
 153      complete : function(trigger) {
 154          window.getSelection().getRangeAt(0).deleteContents();
 155          var complete = Language.complete;
 156          for (var i=0; i<complete.length; i++) {
 157              if(complete[i].input == trigger) {
 158                  var pattern = new RegExp('\\'+trigger+cc);
 159                  var content = complete[i].output.replace(/\$0/g,cc);
 160                  parent.setTimeout(function () { CodePress.syntaxHighlight('complete',pattern,content)},0); // wait for char to appear on screen
 161              }
 162          }
 163      },
 164  
 165      getCompleteChars : function() {
 166          var cChars = '';
 167          for(var i=0;i<Language.complete.length;i++)
 168              cChars += '|'+Language.complete[i].input;
 169          return cChars+'|';
 170      },
 171  
 172      shortcuts : function() {
 173          var cCode = arguments[0];
 174          if(cCode==13) cCode = '[enter]';
 175          else if(cCode==32) cCode = '[space]';
 176          else cCode = '['+String.fromCharCode(charCode).toLowerCase()+']';
 177          for(var i=0;i<Language.shortcuts.length;i++)
 178              if(Language.shortcuts[i].input == cCode)
 179                  this.insertCode(Language.shortcuts[i].output,false);
 180      },
 181      
 182      getRangeAndCaret : function() {    
 183          var range = window.getSelection().getRangeAt(0);
 184          var range2 = range.cloneRange();
 185          var node = range.endContainer;            
 186          var caret = range.endOffset;
 187          range2.selectNode(node);    
 188          return [range2.toString(),caret];
 189      },
 190      
 191      insertCode : function(code,replaceCursorBefore) {
 192          var range = window.getSelection().getRangeAt(0);
 193          var node = window.document.createTextNode(code);
 194          var selct = window.getSelection();
 195          var range2 = range.cloneRange();
 196          // Insert text at cursor position
 197          selct.removeAllRanges();
 198          range.deleteContents();
 199          range.insertNode(node);
 200          // Move the cursor to the end of text
 201          range2.selectNode(node);        
 202          range2.collapse(replaceCursorBefore);
 203          selct.removeAllRanges();
 204          selct.addRange(range2);
 205      },
 206      
 207      // get code from editor
 208      getCode : function() {
 209          var code = editor.innerHTML;
 210          code = code.replace(/<br>/g,'\n');
 211          code = code.replace(/\u2009/g,'');
 212          code = code.replace(/<.*?>/g,'');
 213          code = code.replace(/&lt;/g,'<');
 214          code = code.replace(/&gt;/g,'>');
 215          code = code.replace(/&amp;/gi,'&');
 216          return code;
 217      },
 218  
 219      // put code inside editor
 220      setCode : function() {
 221          var code = arguments[0];
 222          code = code.replace(/\u2009/gi,'');
 223          code = code.replace(/&/gi,'&amp;');
 224             code = code.replace(/</g,'&lt;');
 225          code = code.replace(/>/g,'&gt;');
 226          editor.innerHTML = code;
 227      },
 228  
 229      // undo and redo methods
 230      actions : {
 231          pos : -1, // actual history position
 232          history : [], // history vector
 233          
 234          undo : function() {
 235              if(editor.innerHTML.indexOf(cc)==-1){
 236                  window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));
 237                   this.history[this.pos] = editor.innerHTML;
 238              }
 239              this.pos--;
 240              if(typeof(this.history[this.pos])=='undefined') this.pos++;
 241              editor.innerHTML = this.history[this.pos];
 242              CodePress.findString();
 243          },
 244          
 245          redo : function() {
 246              this.pos++;
 247              if(typeof(this.history[this.pos])=='undefined') this.pos--;
 248              editor.innerHTML = this.history[this.pos];
 249              CodePress.findString();
 250          },
 251          
 252          next : function() { // get next vector position and clean old ones
 253              if(this.pos>20) this.history[this.pos-21] = undefined;
 254              return ++this.pos;
 255          }
 256      }
 257  }
 258  
 259  Language={};
 260  window.addEventListener('load', function() { CodePress.initialize('new'); }, true);