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Viewing changes to www/media/common/edit_area/manage_area.js

  • Committer: mattgiuca
  • Date: 2008-01-15 06:17:23 UTC
  • Revision ID: svn-v3-trunk0:2b9c9e99-6f39-0410-b283-7f802c844ae2:trunk:233
Added a shaky implementation of EditArea as the text editor.
Installed the EditArea files in media/common.
FileBrowser app includes EditArea.
editor.js calls the appropriate methods to set up an EditArea and the Save
button saves its contents.

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www/media/common/edit_area/manage_area.js
 
1
        EditArea.prototype.focus = function() {
 
2
                this.textarea.focus();
 
3
                this.textareaFocused=true;
 
4
        };
 
5
 
 
6
 
 
7
        EditArea.prototype.check_line_selection= function(timer_checkup){
 
8
                //if(do_highlight==false){
 
9
                /*if(this.once!=1){
 
10
                        alert("ONCE a"+ this.isResizing);
 
11
                        this.once=1;
 
12
                }*/
 
13
                if(!editAreas[this.id])
 
14
                        return false;
 
15
                
 
16
                time=new Date;
 
17
                t1=t2=t3= time.getTime();
 
18
                
 
19
                if(!this.smooth_selection && !this.do_highlight){
 
20
                        //formatArea();
 
21
                }else if(this.textareaFocused && editAreas[this.id]["displayed"]==true && this.isResizing==false){
 
22
                        infos= this.get_selection_infos();
 
23
                        time=new Date;
 
24
                        t2= time.getTime();
 
25
                        
 
26
                        //if(this.last_selection["line_start"] != infos["line_start"] || this.last_selection["line_nb"] != infos["line_nb"] || infos["full_text"] != this.last_selection["full_text"]){
 
27
                        if(this.last_selection["line_start"] != infos["line_start"] || this.last_selection["line_nb"] != infos["line_nb"] || infos["full_text"] != this.last_selection["full_text"] || this.reload_highlight){
 
28
                        // if selection change
 
29
                                
 
30
                                new_top=this.lineHeight * (infos["line_start"]-1);
 
31
                                new_height=Math.max(0, this.lineHeight * infos["line_nb"]);
 
32
                                new_width=Math.max(this.textarea.scrollWidth, this.container.clientWidth -50);
 
33
                                
 
34
                                this.selection_field.style.top=new_top+"px";    
 
35
                                this.selection_field.style.width=new_width+"px";
 
36
                                this.selection_field.style.height=new_height+"px";      
 
37
                                document.getElementById("cursor_pos").style.top=new_top+"px";   
 
38
                
 
39
                                if(this.do_highlight==true){
 
40
                                        var curr_text=infos["full_text"].split("\n");
 
41
                                        var content="";
 
42
                                        //alert("length: "+curr_text.length+ " i: "+ Math.max(0,infos["line_start"]-1)+ " end: "+Math.min(curr_text.length, infos["line_start"]+infos["line_nb"]-1)+ " line: "+infos["line_start"]+" [0]: "+curr_text[0]+" [1]: "+curr_text[1]);
 
43
                                        var start=Math.max(0,infos["line_start"]-1);
 
44
                                        var end=Math.min(curr_text.length, infos["line_start"]+infos["line_nb"]-1);
 
45
                                        
 
46
                                        //curr_text[start]= curr_text[start].substr(0,infos["curr_pos"]-1) +"¤_overline_¤"+ curr_text[start].substr(infos["curr_pos"]-1);
 
47
                                        for(i=start; i< end; i++){
 
48
                                                content+= curr_text[i]+"\n";    
 
49
                                        }
 
50
                                        
 
51
                                        content= content.replace(/&/g,"&amp;");
 
52
                                        content= content.replace(/</g,"&lt;");
 
53
                                        content= content.replace(/>/g,"&gt;");
 
54
                                        
 
55
                                        if(this.nav['isIE'] || this.nav['isOpera'])
 
56
                                                this.selection_field.innerHTML= "<pre>" + content.replace("\n", "<br/>") + "</pre>";    
 
57
                                        else
 
58
                                                this.selection_field.innerHTML=content;
 
59
                                                
 
60
                                        if(this.reload_highlight || (infos["full_text"] != this.last_text_to_highlight && (this.last_selection["line_start"]!=infos["line_start"] || this.last_selection["line_nb"]!=infos["line_nb"] || this.last_selection["nb_line"]!=infos["nb_line"]) ) )
 
61
                                                this.maj_highlight(infos);
 
62
                                }               
 
63
                        }
 
64
                        time=new Date;
 
65
                        t3= time.getTime();
 
66
                        
 
67
                        // manage bracket finding
 
68
                        if(infos["line_start"] != this.last_selection["line_start"] || infos["curr_pos"] != this.last_selection["curr_pos"] || infos["full_text"].length!=this.last_selection["full_text"].length || this.reload_highlight){
 
69
                                // move _cursor_pos
 
70
                                var selec_char= infos["curr_line"].charAt(infos["curr_pos"]-1);
 
71
                                var no_real_move=true;
 
72
                                if(infos["line_nb"]==1 && (this.assocBracket[selec_char] || this.revertAssocBracket[selec_char]) ){
 
73
                                        
 
74
                                        no_real_move=false;                                     
 
75
                                        //findEndBracket(infos["line_start"], infos["curr_pos"], selec_char);
 
76
                                        if(this.findEndBracket(infos, selec_char) === true){
 
77
                                                document.getElementById("end_bracket").style.visibility="visible";
 
78
                                                document.getElementById("cursor_pos").style.visibility="visible";
 
79
                                                document.getElementById("cursor_pos").innerHTML= selec_char;
 
80
                                                document.getElementById("end_bracket").innerHTML= (this.assocBracket[selec_char] || this.revertAssocBracket[selec_char]);
 
81
                                        }else{
 
82
                                                document.getElementById("end_bracket").style.visibility="hidden";
 
83
                                                document.getElementById("cursor_pos").style.visibility="hidden";
 
84
                                        }
 
85
                                }else{
 
86
                                        document.getElementById("cursor_pos").style.visibility="hidden";
 
87
                                        document.getElementById("end_bracket").style.visibility="hidden";
 
88
                                }
 
89
                                //alert("move cursor");
 
90
                                this.displayToCursorPosition("cursor_pos", infos["line_start"], infos["curr_pos"]-1, infos["curr_line"], no_real_move);
 
91
                                if(infos["line_nb"]==1 && infos["line_start"]!=this.last_selection["line_start"])
 
92
                                        this.scroll_to_view();
 
93
                        }
 
94
                        this.last_selection=infos;
 
95
                }
 
96
                time=new Date;
 
97
                tend= time.getTime();
 
98
                //this.debug.value="tps total: "+ (tend-t1) + " tps get_infos: "+ (t2-t1)+ " tps jaune: "+ (t3-t2) +" tps cursor: "+ (tend-t3)+" "+typeof(infos);
 
99
                
 
100
                if(timer_checkup){
 
101
                        if(this.do_highlight==true)     //can slow down check speed when highlight mode is on
 
102
                                setTimeout("editArea.check_line_selection(true)", 50);
 
103
                        else
 
104
                                setTimeout("editArea.check_line_selection(true)", 50);
 
105
                }
 
106
        };
 
107
 
 
108
 
 
109
        EditArea.prototype.get_selection_infos= function(){
 
110
                if(this.nav['isIE'])
 
111
                        this.getIESelection();
 
112
                start=this.textarea.selectionStart;
 
113
                end=this.textarea.selectionEnd;         
 
114
                
 
115
                if(this.last_selection["selectionStart"]==start && this.last_selection["selectionEnd"]==end && this.last_selection["full_text"]==this.textarea.value)
 
116
                        return this.last_selection;
 
117
                        
 
118
                if(this.tabulation!="\t" && this.textarea.value.indexOf("\t")!=-1) 
 
119
                {       // can append only after copy/paste 
 
120
                        var len= this.textarea.value.length;
 
121
                        this.textarea.value=this.replace_tab(this.textarea.value);
 
122
                        start=end= start+(this.textarea.value.length-len);
 
123
                        this.area_select(start, 0);
 
124
                }
 
125
                var selections=new Object();
 
126
                selections["selectionStart"]= start;
 
127
                selections["selectionEnd"]= end;                
 
128
                selections["full_text"]= this.textarea.value;
 
129
                selections["line_start"]=1;
 
130
                selections["line_nb"]=1;
 
131
                selections["curr_pos"]=0;
 
132
                selections["curr_line"]="";
 
133
                selections["indexOfCursor"]=0;
 
134
                selections["selec_direction"]= this.last_selection["selec_direction"];
 
135
                
 
136
                //return selections;    
 
137
                
 
138
                var splitTab=selections["full_text"].split("\n");
 
139
                var nbLine=Math.max(0, splitTab.length);                
 
140
                var nbChar=Math.max(0, selections["full_text"].length - (nbLine - 1));  // (remove \n caracters from the count)
 
141
                if(selections["full_text"].indexOf("\r")!=-1)
 
142
                        nbChar= nbChar - (nbLine -1);           // (remove \r caracters from the count)
 
143
                selections["nb_line"]=nbLine;           
 
144
                selections["nb_char"]=nbChar;           
 
145
                if(start>0){
 
146
                        var str=selections["full_text"].substr(0,start);
 
147
                        selections["curr_pos"]= start - str.lastIndexOf("\n");
 
148
                        selections["line_start"]=Math.max(1, str.split("\n").length);
 
149
                }else{
 
150
                        selections["curr_pos"]=1;
 
151
                }
 
152
                if(end>start){
 
153
                        selections["line_nb"]=selections["full_text"].substring(start,end).split("\n").length;
 
154
                }
 
155
                selections["indexOfCursor"]=this.textarea.selectionStart;               
 
156
                selections["curr_line"]=splitTab[Math.max(0,selections["line_start"]-1)];
 
157
                
 
158
                
 
159
                // determine in with direction the direction grow
 
160
                if(selections["selectionStart"]==this.last_selection["selectionStart"]){
 
161
                        if(selections["selectionEnd"]>this.last_selection["selectionEnd"])
 
162
                                selections["selec_direction"]= "down";
 
163
                        else if(selections["selectionEnd"] == this.last_selection["selectionStart"])
 
164
                                selections["selec_direction"]= this.last_selection["selec_direction"];
 
165
                }else if(selections["selectionStart"] == this.last_selection["selectionEnd"] && selections["selectionEnd"]>this.last_selection["selectionEnd"]){
 
166
                        selections["selec_direction"]= "down";
 
167
                }else{
 
168
                        selections["selec_direction"]= "up";
 
169
                }
 
170
                        
 
171
                document.getElementById("nbLine").innerHTML= nbLine;            
 
172
                document.getElementById("nbChar").innerHTML= nbChar;            
 
173
                document.getElementById("linePos").innerHTML=selections["line_start"];
 
174
                document.getElementById("currPos").innerHTML=selections["curr_pos"];
 
175
                
 
176
                return selections;              
 
177
        };
 
178
        
 
179
        // set IE position in Firefox mode (textarea.selectionStart and textarea.selectionEnd)
 
180
        EditArea.prototype.getIESelection= function(){  
 
181
                var range = document.selection.createRange();
 
182
                var stored_range = range.duplicate();
 
183
                stored_range.moveToElementText( this.textarea );
 
184
                stored_range.setEndPoint( 'EndToEnd', range );
 
185
                if(stored_range.parentElement() !=this.textarea)
 
186
                        return;
 
187
        
 
188
                // the range don't take care of empty lines in the end of the selection
 
189
                var scrollTop= this.result.scrollTop + document.body.scrollTop;
 
190
                
 
191
                var relative_top= range.offsetTop - parent.calculeOffsetTop(this.textarea) + scrollTop;
 
192
                
 
193
                var line_start = Math.round((relative_top / this.lineHeight) +1);
 
194
                
 
195
                var line_nb=Math.round(range.boundingHeight / this.lineHeight);
 
196
                                        
 
197
                var range_start=stored_range.text.length - range.text.length;
 
198
                var tab=this.textarea.value.substr(0, range_start).split("\n");                 
 
199
                range_start+= (line_start - tab.length)*2;              // add missing empty lines to the selection
 
200
                this.textarea.selectionStart = range_start;
 
201
                
 
202
                var range_end=this.textarea.selectionStart + range.text.length;
 
203
                tab=this.textarea.value.substr(0, range_start + range.text.length).split("\n");                 
 
204
                range_end+= (line_start + line_nb - 1 - tab.length)*2;
 
205
                
 
206
                this.textarea.selectionEnd = range_end;
 
207
                /*this.textarea.selectionStart = 10;
 
208
                this.textarea.selectionEnd = 50;*/
 
209
        };
 
210
        
 
211
        // select the text for IE (and take care of \r caracters)
 
212
        EditArea.prototype.setIESelection= function(){
 
213
                var nbLineStart=this.textarea.value.substr(0, this.textarea.selectionStart).split("\n").length - 1;
 
214
                var nbLineEnd=this.textarea.value.substr(0, this.textarea.selectionEnd).split("\n").length - 1;
 
215
                var range = document.selection.createRange();
 
216
                range.moveToElementText( this.textarea );
 
217
                range.setEndPoint( 'EndToStart', range );
 
218
                
 
219
                range.moveStart('character', this.textarea.selectionStart - nbLineStart);
 
220
                range.moveEnd('character', this.textarea.selectionEnd - nbLineEnd - (this.textarea.selectionStart - nbLineStart)  );
 
221
                range.select();
 
222
        };
 
223
        
 
224
        EditArea.prototype.tab_selection= function(){
 
225
                if(this.is_tabbing)
 
226
                        return;
 
227
                this.is_tabbing=true;
 
228
                //infos=getSelectionInfos();
 
229
                //if( document.selection ){
 
230
                if( this.nav['isIE'] )
 
231
                        this.getIESelection();
 
232
                /* Insertion du code de formatage */
 
233
                var start = this.textarea.selectionStart;
 
234
                var end = this.textarea.selectionEnd;
 
235
                var insText = this.textarea.value.substring(start, end);
 
236
                
 
237
                /* Insert tabulation and ajust cursor position */
 
238
                var pos_start=start;
 
239
                var pos_end=end;
 
240
                if (insText.length == 0) {
 
241
                        // if only one line selected
 
242
                        this.textarea.value = this.textarea.value.substr(0, start) + this.tabulation + this.textarea.value.substr(end);
 
243
                        pos_start = start + this.tabulation.length;
 
244
                        pos_end=pos_start;
 
245
                } else {
 
246
                        start= Math.max(0, this.textarea.value.substr(0, start).lastIndexOf("\n")+1);
 
247
                        endText=this.textarea.value.substr(end);
 
248
                        startText=this.textarea.value.substr(0, start);
 
249
                        tmp= this.textarea.value.substring(start, end).split("\n");
 
250
                        insText= this.tabulation+tmp.join("\n"+this.tabulation);
 
251
                        this.textarea.value = startText + insText + endText;
 
252
                        pos_start = start;
 
253
                        pos_end= this.textarea.value.indexOf("\n", startText.length + insText.length);
 
254
                        if(pos_end==-1)
 
255
                                pos_end=this.textarea.value.length;
 
256
                        //pos = start + repdeb.length + insText.length + ;
 
257
                }
 
258
                this.textarea.selectionStart = pos_start;
 
259
                this.textarea.selectionEnd = pos_end;
 
260
                
 
261
                //if( document.selection ){
 
262
                if(this.nav['isIE']){
 
263
                        this.setIESelection();
 
264
                        setTimeout("editArea.is_tabbing=false;", 100);  // IE can't accept to make 2 tabulation without a little break between both
 
265
                }else
 
266
                        this.is_tabbing=false;  
 
267
                
 
268
        };
 
269
        
 
270
        EditArea.prototype.invert_tab_selection= function(){
 
271
                if(this.is_tabbing)
 
272
                        return;
 
273
                this.is_tabbing=true;
 
274
                //infos=getSelectionInfos();
 
275
                //if( document.selection ){
 
276
                if(this.nav['isIE'])
 
277
                        this.getIESelection();
 
278
                
 
279
                var start = this.textarea.selectionStart;
 
280
                var end = this.textarea.selectionEnd;
 
281
                var insText = this.textarea.value.substring(start, end);
 
282
                
 
283
                /* Tab remove and cursor seleciton adjust */
 
284
                var pos_start=start;
 
285
                var pos_end=end;
 
286
                if (insText.length == 0) {
 
287
                        if(this.textarea.value.substring(start-this.tabulation.length, start)==this.tabulation)
 
288
                        {
 
289
                                this.textarea.value = this.textarea.value.substr(0, start-this.tabulation.length) + this.textarea.value.substr(end);
 
290
                                pos_start= Math.max(0, start-this.tabulation.length);
 
291
                                pos_end=pos_start;
 
292
                        }       
 
293
                        /*
 
294
                        this.textarea.value = this.textarea.value.substr(0, start) + this.tabulation + insText + this.textarea.value.substr(end);
 
295
                        pos_start = start + this.tabulation.length;
 
296
                        pos_end=pos_start;*/
 
297
                } else {
 
298
                        start= this.textarea.value.substr(0, start).lastIndexOf("\n")+1;
 
299
                        endText=this.textarea.value.substr(end);
 
300
                        startText=this.textarea.value.substr(0, start);
 
301
                        tmp= this.textarea.value.substring(start, end).split("\n");
 
302
                        insText="";
 
303
                        for(i=0; i<tmp.length; i++){                            
 
304
                                for(j=0; j<this.tab_nb_char; j++){
 
305
                                        if(tmp[i].charAt(0)=="\t"){
 
306
                                                tmp[i]=tmp[i].substr(1);
 
307
                                                j=this.tab_nb_char;
 
308
                                        }else if(tmp[i].charAt(0)==" ")
 
309
                                                tmp[i]=tmp[i].substr(1);
 
310
                                }               
 
311
                                insText+=tmp[i];
 
312
                                if(i<tmp.length-1)
 
313
                                        insText+="\n";
 
314
                        }
 
315
                        //insText+="_";
 
316
                        this.textarea.value = startText + insText + endText;
 
317
                        pos_start = start;
 
318
                        pos_end= this.textarea.value.indexOf("\n", startText.length + insText.length);
 
319
                        if(pos_end==-1)
 
320
                                pos_end=this.textarea.value.length;
 
321
                        //pos = start + repdeb.length + insText.length + ;
 
322
                }
 
323
                this.textarea.selectionStart = pos_start;
 
324
                this.textarea.selectionEnd = pos_end;
 
325
                
 
326
                //if( document.selection ){
 
327
                if(this.nav['isIE']){
 
328
                        // select the text for IE
 
329
                        this.setIESelection();
 
330
                        setTimeout("editArea.is_tabbing=false;", 100);  // IE can accept to make 2 tabulation without a little break between both
 
331
                }else
 
332
                        this.is_tabbing=false;
 
333
        };
 
334
        
 
335
        EditArea.prototype.press_enter= function(){             
 
336
                if(!this.smooth_selection)
 
337
                        return false;
 
338
                if(this.nav['isIE'])
 
339
                        this.getIESelection();
 
340
                var scrollTop= this.result.scrollTop;
 
341
                var scrollLeft= this.result.scrollLeft;
 
342
                var start=this.textarea.selectionStart;
 
343
                var end= this.textarea.selectionEnd;
 
344
                var start_last_line= Math.max(0 , this.textarea.value.substring(0, start).lastIndexOf("\n") + 1 );
 
345
                var begin_line= this.textarea.value.substring(start_last_line, start).replace(/^([ \t]*).*/gm, "$1");
 
346
                if(begin_line=="\n" || begin_line=="\r" || begin_line.length==0)
 
347
                        return false;
 
348
                        
 
349
                if(this.nav['isIE'] || this.nav['isOpera']){
 
350
                        begin_line="\r\n"+ begin_line;
 
351
                }else{
 
352
                        begin_line="\n"+ begin_line;
 
353
                }       
 
354
                //alert(start_last_line+" strat: "+start +"\n"+this.textarea.value.substring(start_last_line, start)+"\n_"+begin_line+"_")
 
355
                this.textarea.value= this.textarea.value.substring(0, start) + begin_line + this.textarea.value.substring(end);
 
356
                
 
357
                this.area_select(start+ begin_line.length ,0);
 
358
                // during this process IE scroll back to the top of the textarea
 
359
                if(this.nav['isIE']){
 
360
                        this.result.scrollTop= scrollTop;
 
361
                        this.result.scrollLeft= scrollLeft;
 
362
                }
 
363
                return true;
 
364
                
 
365
        };
 
366
        
 
367
        
 
368
        EditArea.prototype.findEndBracket= function(infos, bracket){
 
369
                        
 
370
                var start=infos["indexOfCursor"];
 
371
                var normal_order=true;
 
372
                //curr_text=infos["full_text"].split("\n");
 
373
                if(this.assocBracket[bracket])
 
374
                        endBracket=this.assocBracket[bracket];
 
375
                else if(this.revertAssocBracket[bracket]){
 
376
                        endBracket=this.revertAssocBracket[bracket];
 
377
                        normal_order=false;
 
378
                }       
 
379
                var end=-1;
 
380
                var nbBracketOpen=0;
 
381
                
 
382
                for(var i=start; i<infos["full_text"].length && i>=0; ){
 
383
                        if(infos["full_text"].charAt(i)==endBracket){                           
 
384
                                nbBracketOpen--;
 
385
                                if(nbBracketOpen<=0){
 
386
                                        //i=infos["full_text"].length;
 
387
                                        end=i;
 
388
                                        break;
 
389
                                }
 
390
                        }else if(infos["full_text"].charAt(i)==bracket)
 
391
                                nbBracketOpen++;
 
392
                        if(normal_order)
 
393
                                i++;
 
394
                        else
 
395
                                i--;
 
396
                }
 
397
                
 
398
                //end=infos["full_text"].indexOf("}", start);
 
399
                if(end==-1)
 
400
                        return false;   
 
401
                var endLastLine=infos["full_text"].substr(0, end).lastIndexOf("\n");                    
 
402
                if(endLastLine==-1)
 
403
                        line=1;
 
404
                else
 
405
                        line= infos["full_text"].substr(0, endLastLine).split("\n").length + 1;
 
406
                                        
 
407
                var curPos= end - endLastLine;
 
408
                
 
409
                this.displayToCursorPosition("end_bracket", line, curPos, infos["full_text"].substring(endLastLine +1, end));
 
410
                return true;
 
411
        };
 
412
        
 
413
        EditArea.prototype.displayToCursorPosition= function(id, start_line, cur_pos, lineContent, no_real_move){
 
414
                var elem= document.getElementById("test_font_size");
 
415
                var dest= document.getElementById(id);
 
416
                var postLeft=0;
 
417
                elem.innerHTML="<pre><span id='test_font_size_inner'>"+lineContent.substr(0, cur_pos).replace(/&/g,"&amp;").replace(/</g,"&lt;")+"</span></pre>";
 
418
                posLeft= 45 + document.getElementById('test_font_size_inner').offsetWidth;
 
419
 
 
420
                var posTop=this.lineHeight * (start_line-1);
 
421
        
 
422
                if(no_real_move!=true){ // when the cursor is hidden no need to move him
 
423
                        dest.style.top=posTop+"px";
 
424
                        dest.style.left=posLeft+"px";           
 
425
                }
 
426
                // usefull for smarter scroll
 
427
                dest.cursor_top=posTop;
 
428
                dest.cursor_left=posLeft;
 
429
                
 
430
        //      document.getElementById(id).style.marginLeft=posLeft+"px";
 
431
                
 
432
        };
 
433
        
 
434
        
 
435
        EditArea.prototype.area_select= function(start, length){
 
436
                this.textarea.focus();
 
437
                
 
438
                start= Math.max(0, Math.min(this.textarea.value.length, start));
 
439
                end= Math.max(start, Math.min(this.textarea.value.length, start+length));
 
440
 
 
441
                if(this.nav['isIE']){
 
442
                        this.textarea.selectionStart = start;
 
443
                        this.textarea.selectionEnd = end;               
 
444
                        this.setIESelection();
 
445
                }else{
 
446
                        if(this.nav['isOpera']){        // Opera bug when moving selection start and selection end
 
447
                                /*this.textarea.selectionEnd = 1;       
 
448
                                this.textarea.selectionStart = 0;                       
 
449
                                this.textarea.selectionEnd = 1; 
 
450
                                this.textarea.selectionStart = 0;
 
451
                                this.textarea.selectionEnd = 0; 
 
452
                                this.textarea.selectionStart = 0;
 
453
                                this.textarea.selectionEnd = 0; 
 
454
                                this.textarea.selectionStart = 0;*/
 
455
                                this.textarea.setSelectionRange(0, 0);
 
456
                        }
 
457
                        this.textarea.setSelectionRange(start, end);
 
458
                }
 
459
                this.check_line_selection();
 
460
        };
 
461
        
 
462
        
 
463
        EditArea.prototype.area_get_selection= function(){
 
464
                var text="";
 
465
                if( document.selection ){
 
466
                        var range = document.selection.createRange();
 
467
                        text=range.text;
 
468
                }else{
 
469
                        text= this.textarea.value.substring(this.textarea.selectionStart, this.textarea.selectionEnd);
 
470
                }
 
471
                return text;                    
 
472
        };