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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          document.designMode = 'on';
  31          document.addEventListener('keypress', this.keyHandler, true);
  32          window.addEventListener('scroll', function() { if(!CodePress.scrolling) CodePress.syntaxHighlight('scroll') }, false);
  33          completeChars = this.getCompleteChars();
  34          completeEndingChars =  this.getCompleteEndingChars();
  35      },
  36  
  37      // treat key bindings
  38      keyHandler : function(evt) {
  39          keyCode = evt.keyCode;    
  40          charCode = evt.charCode;
  41          fromChar = String.fromCharCode(charCode);
  42  
  43          if((evt.ctrlKey || evt.metaKey) && evt.shiftKey && charCode!=90)  { // shortcuts = ctrl||appleKey+shift+key!=z(undo) 
  44              CodePress.shortcuts(charCode?charCode:keyCode);
  45          }
  46          else if( (completeEndingChars.indexOf('|'+fromChar+'|')!= -1 || completeChars.indexOf('|'+fromChar+'|')!=-1) && CodePress.autocomplete) { // auto complete
  47              if(!CodePress.completeEnding(fromChar))
  48                   CodePress.complete(fromChar);
  49          }
  50          else if(chars.indexOf('|'+charCode+'|')!=-1||keyCode==13) { // syntax highlighting
  51              top.setTimeout(function(){CodePress.syntaxHighlight('generic');},100);
  52          }
  53          else if(keyCode==9 || evt.tabKey) {  // snippets activation (tab)
  54              CodePress.snippets(evt);
  55          }
  56          else if(keyCode==46||keyCode==8) { // save to history when delete or backspace pressed
  57               CodePress.actions.history[CodePress.actions.next()] = editor.innerHTML;
  58          }
  59          else if((charCode==122||charCode==121||charCode==90) && evt.ctrlKey) { // undo and redo
  60              (charCode==121||evt.shiftKey) ? CodePress.actions.redo() :  CodePress.actions.undo(); 
  61              evt.preventDefault();
  62          }
  63          else if(charCode==118 && evt.ctrlKey)  { // handle paste
  64               top.setTimeout(function(){CodePress.syntaxHighlight('generic');},100);
  65          }
  66          else if(charCode==99 && evt.ctrlKey)  { // handle cut
  67               //alert(window.getSelection().getRangeAt(0).toString().replace(/\t/g,'FFF'));
  68          }
  69  
  70      },
  71  
  72      // put cursor back to its original position after every parsing
  73      findString : function() {
  74          if(self.find(cc))
  75              window.getSelection().getRangeAt(0).deleteContents();
  76      },
  77      
  78      // split big files, highlighting parts of it
  79      split : function(code,flag) {
  80          if(flag=='scroll') {
  81              this.scrolling = true;
  82              return code;
  83          }
  84          else {
  85              this.scrolling = false;
  86              mid = code.indexOf(cc);
  87              if(mid-2000<0) {ini=0;end=4000;}
  88              else if(mid+2000>code.length) {ini=code.length-4000;end=code.length;}
  89              else {ini=mid-2000;end=mid+2000;}
  90              code = code.substring(ini,end);
  91              return code;
  92          }
  93      },
  94      
  95      getEditor : function() {
  96          if(!document.getElementsByTagName('pre')[0]) {
  97              body = document.getElementsByTagName('body')[0];
  98              if(!body.innerHTML) return body;
  99              if(body.innerHTML=="<br>") body.innerHTML = "<pre> </pre>";
 100              else body.innerHTML = "<pre>"+body.innerHTML+"</pre>";
 101          }
 102          return document.getElementsByTagName('pre')[0];
 103      },
 104      
 105      // syntax highlighting parser
 106      syntaxHighlight : function(flag) {
 107          //if(document.designMode=='off') document.designMode='on'
 108          if(flag != 'init') { window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));}
 109          editor = CodePress.getEditor();
 110          o = editor.innerHTML;
 111          o = o.replace(/<br>/g,'\n');
 112          o = o.replace(/<.*?>/g,'');
 113          x = z = this.split(o,flag);
 114          x = x.replace(/\n/g,'<br>');
 115  
 116          if(arguments[1]&&arguments[2]) x = x.replace(arguments[1],arguments[2]);
 117      
 118          for(i=0;i<Language.syntax.length;i++) 
 119              x = x.replace(Language.syntax[i].input,Language.syntax[i].output);
 120  
 121          editor.innerHTML = this.actions.history[this.actions.next()] = (flag=='scroll') ? x : o.split(z).join(x);
 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      getCompleteEndingChars : function() {
 173          var cChars = '';
 174          for(var i=0;i<Language.complete.length;i++)
 175              cChars += '|'+Language.complete[i].output.charAt(Language.complete[i].output.length-1);
 176          return cChars+'|';
 177      },
 178      
 179      completeEnding : function(trigger) {
 180          var range = window.getSelection().getRangeAt(0);
 181          try {
 182              range.setEnd(range.endContainer, range.endOffset+1)
 183          }
 184          catch(e) {
 185              return false;
 186          }
 187          var next_character = range.toString()
 188          range.setEnd(range.endContainer, range.endOffset-1)
 189          if(next_character != trigger) return false;
 190          else {
 191              range.setEnd(range.endContainer, range.endOffset+1)
 192              range.deleteContents();
 193              return true;
 194          }
 195      },
 196      
 197      shortcuts : function() {
 198          var cCode = arguments[0];
 199          if(cCode==13) cCode = '[enter]';
 200          else if(cCode==32) cCode = '[space]';
 201          else cCode = '['+String.fromCharCode(charCode).toLowerCase()+']';
 202          for(var i=0;i<Language.shortcuts.length;i++)
 203              if(Language.shortcuts[i].input == cCode)
 204                  this.insertCode(Language.shortcuts[i].output,false);
 205      },
 206      
 207      getRangeAndCaret : function() {    
 208          var range = window.getSelection().getRangeAt(0);
 209          var range2 = range.cloneRange();
 210          var node = range.endContainer;            
 211          var caret = range.endOffset;
 212          range2.selectNode(node);    
 213          return [range2.toString(),caret];
 214      },
 215      
 216      insertCode : function(code,replaceCursorBefore) {
 217          var range = window.getSelection().getRangeAt(0);
 218          var node = window.document.createTextNode(code);
 219          var selct = window.getSelection();
 220          var range2 = range.cloneRange();
 221          // Insert text at cursor position
 222          selct.removeAllRanges();
 223          range.deleteContents();
 224          range.insertNode(node);
 225          // Move the cursor to the end of text
 226          range2.selectNode(node);        
 227          range2.collapse(replaceCursorBefore);
 228          selct.removeAllRanges();
 229          selct.addRange(range2);
 230      },
 231      
 232      // get code from editor
 233      getCode : function() {
 234          if(!document.getElementsByTagName('pre')[0] || editor.innerHTML == '')
 235              editor = CodePress.getEditor();
 236          var code = editor.innerHTML;
 237          code = code.replace(/<br>/g,'\n');
 238          code = code.replace(/\u2009/g,'');
 239          code = code.replace(/<.*?>/g,'');
 240          code = code.replace(/&lt;/g,'<');
 241          code = code.replace(/&gt;/g,'>');
 242          code = code.replace(/&amp;/gi,'&');
 243          return code;
 244      },
 245  
 246      // put code inside editor
 247      setCode : function() {
 248          var code = arguments[0];
 249          code = code.replace(/\u2009/gi,'');
 250          code = code.replace(/&/gi,'&amp;');
 251          code = code.replace(/</g,'&lt;');
 252          code = code.replace(/>/g,'&gt;');
 253          editor.innerHTML = code;
 254          if (code == '')
 255              document.getElementsByTagName('body')[0].innerHTML = '';
 256      },
 257  
 258      // undo and redo methods
 259      actions : {
 260          pos : -1, // actual history position
 261          history : [], // history vector
 262          
 263          undo : function() {
 264              editor = CodePress.getEditor();
 265              if(editor.innerHTML.indexOf(cc)==-1){
 266                  if(editor.innerHTML != " ")
 267                      window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));
 268                  this.history[this.pos] = editor.innerHTML;
 269              }
 270              this.pos --;
 271              if(typeof(this.history[this.pos])=='undefined') this.pos ++;
 272              editor.innerHTML = this.history[this.pos];
 273              if(editor.innerHTML.indexOf(cc)>-1) editor.innerHTML+=cc;
 274              CodePress.findString();
 275          },
 276          
 277          redo : function() {
 278              // editor = CodePress.getEditor();
 279              this.pos++;
 280              if(typeof(this.history[this.pos])=='undefined') this.pos--;
 281              editor.innerHTML = this.history[this.pos];
 282              CodePress.findString();
 283          },
 284          
 285          next : function() { // get next vector position and clean old ones
 286              if(this.pos>20) this.history[this.pos-21] = undefined;
 287              return ++this.pos;
 288          }
 289      }
 290  }
 291  
 292  Language={};
 293  window.addEventListener('load', function() { CodePress.initialize('new'); }, true);