/**
+ * @class Ext.form.TextArea
+ * @extends Ext.form.TextField
+ * Multiline text field. Can be used as a direct replacement for traditional textarea fields, plus adds
+ * support for auto-sizing.
+ * @constructor
+ * Creates a new TextArea
+ * @param {Object} config Configuration options
+ * @xtype textarea
+ */
+Ext.form.TextArea = Ext.extend(Ext.form.TextField, {
+ /**
+ * @cfg {Number} growMin The minimum height to allow when {@link Ext.form.TextField#grow grow}=true
+ * (defaults to 60)
+ */
+ growMin : 60,
+ /**
+ * @cfg {Number} growMax The maximum height to allow when {@link Ext.form.TextField#grow grow}=true
+ * (defaults to 1000)
+ */
+ growMax: 1000,
+ growAppend : ' \n ',
+ growPad : Ext.isWebKit ? -6 : 0,
+
+ enterIsSpecial : false,
+
+ /**
+ * @cfg {Boolean} preventScrollbars true to prevent scrollbars from appearing regardless of how much text is
+ * in the field (equivalent to setting overflow: hidden, defaults to false)
+ */
+ preventScrollbars: false,
+ /**
+ * @cfg {String/Object} autoCreate A {@link Ext.DomHelper DomHelper} element spec, or true for a default
+ * element spec. Used to create the {@link Ext.Component#getEl Element} which will encapsulate this Component.
+ * See {@link Ext.Component#autoEl autoEl} for details. Defaults to:
+ * {tag: "textarea", style: "width:100px;height:60px;", autocomplete: "off"}
+ */
+
+ // private
+ onRender : function(ct, position){
+ if(!this.el){
+ this.defaultAutoCreate = {
+ tag: "textarea",
+ style:"width:100px;height:60px;",
+ autocomplete: "off"
+ };
+ }
+ Ext.form.TextArea.superclass.onRender.call(this, ct, position);
+ if(this.grow){
+ this.textSizeEl = Ext.DomHelper.append(document.body, {
+ tag: "pre", cls: "x-form-grow-sizer"
+ });
+ if(this.preventScrollbars){
+ this.el.setStyle("overflow", "hidden");
+ }
+ this.el.setHeight(this.growMin);
+ }
+ },
+
+ onDestroy : function(){
+ Ext.destroy(this.textSizeEl);
+ Ext.form.TextArea.superclass.onDestroy.call(this);
+ },
+
+ fireKey : function(e){
+ if(e.isSpecialKey() && (this.enterIsSpecial || (e.getKey() != e.ENTER || e.hasModifier()))){
+ this.fireEvent("specialkey", this, e);
+ }
+ },
+
+ // private
+ onKeyUp : function(e){
+ if(!e.isNavKeyPress() || e.getKey() == e.ENTER){
+ this.autoSize();
+ }
+ Ext.form.TextArea.superclass.onKeyUp.call(this, e);
+ },
+
+ /**
+ * Automatically grows the field to accomodate the height of the text up to the maximum field height allowed.
+ * This only takes effect if grow = true, and fires the {@link #autosize} event if the height changes.
+ */
+ autoSize: function(){
+ if(!this.grow || !this.textSizeEl){
+ return;
+ }
+ var el = this.el;
+ var v = el.dom.value;
+ var ts = this.textSizeEl;
+ ts.innerHTML = '';
+ ts.appendChild(document.createTextNode(v));
+ v = ts.innerHTML;
+ Ext.fly(ts).setWidth(this.el.getWidth());
+ if(v.length < 1){
+ v = " ";
+ }else{
+ v += this.growAppend;
+ if(Ext.isIE){
+ v = v.replace(/\n/g, '
');
+ }
+ }
+ ts.innerHTML = v;
+ var h = Math.min(this.growMax, Math.max(ts.offsetHeight, this.growMin) + this.growPad);
+ if(h != this.lastHeight){
+ this.lastHeight = h;
+ this.el.setHeight(h);
+ this.fireEvent("autosize", this, h);
+ }
+ }
+});
+Ext.reg('textarea', Ext.form.TextArea);
+
+
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