codepress/engines/gecko.js

   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);