~azzar1/unity/add-show-desktop-key

« back to all changes in this revision

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

  • Committer: William Grant
  • Date: 2008-07-07 01:45:11 UTC
  • mfrom: (unknown (missing))
  • Revision ID: wgrant@ugrad.unimelb.edu.au-20080707014511-xyy43p6y8jiqrsh9
Merge killall-editarea branch. We now use CodePress instead, which is
somewhat less slothful.

Show diffs side-by-side

added added

removed removed

Lines of Context:
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
 
        };