if(typeof(Prototype)=="undefined")
throw"Control.TextArea requires Prototype to be loaded.";if(typeof(Object.Event)=="undefined")
throw"Control.TextArea requires Object.Event to be loaded.";Control.TextArea=Class.create({initialize:function(textarea){this.onChangeTimeout=false;this.element=$(textarea);$(this.element).observe('keyup',this.doOnChange.bindAsEventListener(this));$(this.element).observe('paste',this.doOnChange.bindAsEventListener(this));$(this.element).observe('input',this.doOnChange.bindAsEventListener(this));if(!!document.selection){$(this.element).observe('mouseup',this.saveRange.bindAsEventListener(this));$(this.element).observe('keyup',this.saveRange.bindAsEventListener(this));}},doOnChange:function(event){if(this.onChangeTimeout)
window.clearTimeout(this.onChangeTimeout);this.onChangeTimeout=window.setTimeout(function(){this.notify('change',this.getValue());}.bind(this),Control.TextArea.onChangeTimeoutLength);},saveRange:function(){this.range=document.selection.createRange();},getValue:function(){return this.element.value;},getSelection:function(){if(!!document.selection)
return document.selection.createRange().text;else if(!!this.element.setSelectionRange)
return this.element.value.substring(this.element.selectionStart,this.element.selectionEnd);else
return false;},replaceSelection:function(text){var scroll_top=this.element.scrollTop;if(!!document.selection){this.element.focus();var range=(this.range)?this.range:document.selection.createRange();range.text=text;range.select();}else if(!!this.element.setSelectionRange){var selection_start=this.element.selectionStart;this.element.value=this.element.value.substring(0,selection_start)+ text+ this.element.value.substring(this.element.selectionEnd);this.element.setSelectionRange(selection_start+ text.length,selection_start+ text.length);}
this.doOnChange();this.element.focus();this.element.scrollTop=scroll_top;},wrapSelection:function(before,after){this.replaceSelection(before+ this.getSelection()+ after);},insertBeforeSelection:function(text){this.replaceSelection(text+ this.getSelection());},insertAfterSelection:function(text){this.replaceSelection(this.getSelection()+ text);},collectFromEachSelectedLine:function(callback,before,after){this.replaceSelection((before||'')+ $A(this.getSelection().split("\n")).collect(callback).join("\n")+(after||''));},insertBeforeEachSelectedLine:function(text,before,after){this.collectFromEachSelectedLine(function(line){},before,after);}});Object.extend(Control.TextArea,{onChangeTimeoutLength:500});Object.Event.extend(Control.TextArea);Control.TextArea.ToolBar=Class.create({initialize:function(textarea,toolbar){this.textarea=textarea;if(toolbar)
this.container=$(toolbar);else{this.container=$(document.createElement('ul'));this.textarea.element.parentNode.insertBefore(this.container,this.textarea.element);}},attachButton:function(node,callback){node.onclick=function(){return false;}
$(node).observe('click',callback.bindAsEventListener(this.textarea));},addButton:function(link_text,callback,attrs){var li=document.createElement('li');var a=document.createElement('a');a.href='#';this.attachButton(a,callback);li.appendChild(a);Object.extend(a,attrs||{});if(link_text){var span=document.createElement('span');span.innerHTML=link_text;a.appendChild(span);}
this.container.appendChild(li);}});