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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   * Developers:
   7   *        Fernando M.A.d.S. <fermads@gmail.com>
   8   *        Michael Hurni <michael.hurni@gmail.com>
   9   * Contributors:     
  10   *        Martin D. Kirk
  11   *
  12   * This program is free software; you can redistribute it and/or modify it under the terms of the 
  13   * GNU Lesser General Public License as published by the Free Software Foundation.
  14   * 
  15   * Read the full licence: http://www.opensource.org/licenses/lgpl-license.php
  16   */
  17  
  18  CodePress = {
  19      scrolling : false,
  20      autocomplete : true,
  21  
  22      // set initial vars and start sh
  23      initialize : function() {
  24          if(typeof(editor)=='undefined' && !arguments[0]) return;
  25          body = document.getElementsByTagName('body')[0];
  26          body.innerHTML = body.innerHTML.replace(/\n/g,"");
  27          chars = '|32|46|62|8|'; // charcodes that trigger syntax highlighting
  28          cc = '\u2009'; // carret char
  29          editor = document.getElementsByTagName('pre')[0];
  30          
  31          document.designMode = 'on';
  32          
  33          document.addEventListener('keypress', this.keyHandler, true);
  34          window.addEventListener('scroll', function() { if(!CodePress.scrolling) CodePress.syntaxHighlight('scroll') }, false);
  35          completeChars = this.getCompleteChars();
  36          completeEndingChars =  this.getCompleteEndingChars();
  37      },
  38  
  39      // treat key bindings
  40      keyHandler : function(evt) {
  41          keyCode = evt.keyCode;    
  42          charCode = evt.charCode;
  43          fromChar = String.fromCharCode(charCode);
  44  
  45          if((evt.ctrlKey || evt.metaKey) && evt.shiftKey && charCode!=90)  { // shortcuts = ctrl||appleKey+shift+key!=z(undo) 
  46              CodePress.shortcuts(charCode?charCode:keyCode);
  47          }
  48          else if( (completeEndingChars.indexOf('|'+fromChar+'|')!= -1 || completeChars.indexOf('|'+fromChar+'|')!=-1) && CodePress.autocomplete) { // auto complete
  49              if(!CodePress.completeEnding(fromChar))
  50                   CodePress.complete(fromChar);
  51          }
  52          else if(chars.indexOf('|'+charCode+'|')!=-1||keyCode==13) { // syntax highlighting
  53              top.setTimeout(function(){CodePress.syntaxHighlight('generic');},100);
  54          }
  55          else if(keyCode==9 || evt.tabKey) {  // snippets activation (tab)
  56              CodePress.snippets(evt);
  57          }
  58          else if(keyCode==46||keyCode==8) { // save to history when delete or backspace pressed
  59               CodePress.actions.history[CodePress.actions.next()] = editor.innerHTML;
  60          }
  61          else if((charCode==122||charCode==121||charCode==90) && evt.ctrlKey) { // undo and redo
  62              (charCode==121||evt.shiftKey) ? CodePress.actions.redo() :  CodePress.actions.undo(); 
  63              evt.preventDefault();
  64          }
  65          else if(charCode==118 && evt.ctrlKey)  { // handle paste
  66               top.setTimeout(function(){CodePress.syntaxHighlight('generic');},100);
  67          }
  68          else if(charCode==99 && evt.ctrlKey)  { // handle cut
  69               //alert(window.getSelection().getRangeAt(0).toString().replace(/\t/g,'FFF'));
  70          }
  71  
  72      },
  73  
  74      // put cursor back to its original position after every parsing
  75      findString : function() {
  76          if(self.find(cc))
  77              window.getSelection().getRangeAt(0).deleteContents();
  78      },
  79      
  80      // split big files, highlighting parts of it
  81      split : function(code,flag) {
  82          if(flag=='scroll') {
  83              this.scrolling = true;
  84              return code;
  85          }
  86          else {
  87              this.scrolling = false;
  88              mid = code.indexOf(cc);
  89              if(mid-2000<0) {ini=0;end=4000;}
  90              else if(mid+2000>code.length) {ini=code.length-4000;end=code.length;}
  91              else {ini=mid-2000;end=mid+2000;}
  92              code = code.substring(ini,end);
  93              return code;
  94          }
  95      },
  96      
  97      getEditor : function() {
  98          if(!document.getElementsByTagName('pre')[0]) {
  99              body = document.getElementsByTagName('body')[0];
 100              if(!body.innerHTML) return body;
 101              if(body.innerHTML=="<br>") body.innerHTML = "<pre> </pre>";
 102              else body.innerHTML = "<pre>"+body.innerHTML+"</pre>";
 103          }
 104          return document.getElementsByTagName('pre')[0];
 105      },
 106      
 107      // syntax highlighting parser
 108      syntaxHighlight : function(flag) {
 109          //if(document.designMode=='off') document.designMode='on'
 110          if(flag != 'init') { window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));}
 111          editor = CodePress.getEditor();
 112          o = editor.innerHTML;
 113          o = o.replace(/<br>/g,'\n');
 114          o = o.replace(/<.*?>/g,'');
 115          x = z = this.split(o,flag);
 116          x = x.replace(/\n/g,'<br>');
 117  
 118          if(arguments[1]&&arguments[2]) x = x.replace(arguments[1],arguments[2]);
 119      
 120          for(i=0;i<Language.syntax.length;i++) 
 121              x = x.replace(Language.syntax[i].input,Language.syntax[i].output);
 122  
 123          editor.innerHTML = this.actions.history[this.actions.next()] = (flag=='scroll') ? x : o.split(z).join(x);
 124          if(flag!='init') this.findString();
 125      },
 126      
 127      getLastWord : function() {
 128          var rangeAndCaret = CodePress.getRangeAndCaret();
 129          words = rangeAndCaret[0].substring(rangeAndCaret[1]-40,rangeAndCaret[1]);
 130          words = words.replace(/[\s\n\r\);\W]/g,'\n').split('\n');
 131          return words[words.length-1].replace(/[\W]/gi,'').toLowerCase();
 132      },
 133      
 134      snippets : function(evt) {
 135          var snippets = Language.snippets;    
 136          var trigger = this.getLastWord();
 137          for (var i=0; i<snippets.length; i++) {
 138              if(snippets[i].input == trigger) {
 139                  var content = snippets[i].output.replace(/</g,'&lt;');
 140                  content = content.replace(/>/g,'&gt;');
 141                  if(content.indexOf('$0')<0) content += cc;
 142                  else content = content.replace(/\$0/,cc);
 143                  content = content.replace(/\n/g,'<br>');
 144                  var pattern = new RegExp(trigger+cc,'gi');
 145                  evt.preventDefault(); // prevent the tab key from being added
 146                  this.syntaxHighlight('snippets',pattern,content);
 147              }
 148          }
 149      },
 150      
 151      readOnly : function() {
 152          document.designMode = (arguments[0]) ? 'off' : 'on';
 153      },
 154  
 155      complete : function(trigger) {
 156          window.getSelection().getRangeAt(0).deleteContents();
 157          var complete = Language.complete;
 158          for (var i=0; i<complete.length; i++) {
 159              if(complete[i].input == trigger) {
 160                  var pattern = new RegExp('\\'+trigger+cc);
 161                  var content = complete[i].output.replace(/\$0/g,cc);
 162                  parent.setTimeout(function () { CodePress.syntaxHighlight('complete',pattern,content)},0); // wait for char to appear on screen
 163              }
 164          }
 165      },
 166  
 167      getCompleteChars : function() {
 168          var cChars = '';
 169          for(var i=0;i<Language.complete.length;i++)
 170              cChars += '|'+Language.complete[i].input;
 171          return cChars+'|';
 172      },
 173      
 174      getCompleteEndingChars : function() {
 175          var cChars = '';
 176          for(var i=0;i<Language.complete.length;i++)
 177              cChars += '|'+Language.complete[i].output.charAt(Language.complete[i].output.length-1);
 178          return cChars+'|';
 179      },
 180      
 181      completeEnding : function(trigger) {
 182          var range = window.getSelection().getRangeAt(0);
 183          try {
 184              range.setEnd(range.endContainer, range.endOffset+1)
 185          }
 186          catch(e) {
 187              return false;
 188          }
 189          var next_character = range.toString()
 190          range.setEnd(range.endContainer, range.endOffset-1)
 191          if(next_character != trigger) return false;
 192          else {
 193              range.setEnd(range.endContainer, range.endOffset+1)
 194              range.deleteContents();
 195              return true;
 196          }
 197      },
 198      
 199      shortcuts : function() {
 200          var cCode = arguments[0];
 201          if(cCode==13) cCode = '[enter]';
 202          else if(cCode==32) cCode = '[space]';
 203          else cCode = '['+String.fromCharCode(charCode).toLowerCase()+']';
 204          for(var i=0;i<Language.shortcuts.length;i++)
 205              if(Language.shortcuts[i].input == cCode)
 206                  this.insertCode(Language.shortcuts[i].output,false);
 207      },
 208      
 209      getRangeAndCaret : function() {    
 210          var range = window.getSelection().getRangeAt(0);
 211          var range2 = range.cloneRange();
 212          var node = range.endContainer;            
 213          var caret = range.endOffset;
 214          range2.selectNode(node);    
 215          return [range2.toString(),caret];
 216      },
 217      
 218      insertCode : function(code,replaceCursorBefore) {
 219          var range = window.getSelection().getRangeAt(0);
 220          var node = window.document.createTextNode(code);
 221          var selct = window.getSelection();
 222          var range2 = range.cloneRange();
 223          // Insert text at cursor position
 224          selct.removeAllRanges();
 225          range.deleteContents();
 226          range.insertNode(node);
 227          // Move the cursor to the end of text
 228          range2.selectNode(node);        
 229          range2.collapse(replaceCursorBefore);
 230          selct.removeAllRanges();
 231          selct.addRange(range2);
 232      },
 233      
 234      // get code from editor
 235      getCode : function() {
 236          if(!document.getElementsByTagName('pre')[0] || editor.innerHTML == '')
 237              editor = CodePress.getEditor();
 238          var code = editor.innerHTML;
 239          code = code.replace(/<br>/g,'\n');
 240          code = code.replace(/\u2009/g,'');
 241          code = code.replace(/<.*?>/g,'');
 242          code = code.replace(/&lt;/g,'<');
 243          code = code.replace(/&gt;/g,'>');
 244          code = code.replace(/&amp;/gi,'&');
 245          return code;
 246      },
 247  
 248      // put code inside editor
 249      setCode : function() {
 250          var code = arguments[0];
 251          code = code.replace(/\u2009/gi,'');
 252          code = code.replace(/&/gi,'&amp;');
 253          code = code.replace(/</g,'&lt;');
 254          code = code.replace(/>/g,'&gt;');
 255          editor.innerHTML = code;
 256          if (code == '')
 257              document.getElementsByTagName('body')[0].innerHTML = '';
 258      },
 259  
 260      // undo and redo methods
 261      actions : {
 262          pos : -1, // actual history position
 263          history : [], // history vector
 264          
 265          undo : function() {
 266              editor = CodePress.getEditor();
 267              if(editor.innerHTML.indexOf(cc)==-1){
 268                  if(editor.innerHTML != " ")
 269                      window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));
 270                  this.history[this.pos] = editor.innerHTML;
 271              }
 272              this.pos --;
 273              if(typeof(this.history[this.pos])=='undefined') this.pos ++;
 274              editor.innerHTML = this.history[this.pos];
 275              if(editor.innerHTML.indexOf(cc)>-1) editor.innerHTML+=cc;
 276              CodePress.findString();
 277          },
 278          
 279          redo : function() {
 280              // editor = CodePress.getEditor();
 281              this.pos++;
 282              if(typeof(this.history[this.pos])=='undefined') this.pos--;
 283              editor.innerHTML = this.history[this.pos];
 284              CodePress.findString();
 285          },
 286          
 287          next : function() { // get next vector position and clean old ones
 288              if(this.pos>20) this.history[this.pos-21] = undefined;
 289              return ++this.pos;
 290          }
 291      }
 292  }
 293  
 294  Language={};
 295  window.addEventListener('load', function() { CodePress.initialize('new'); }, true);