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/* <copyright>
This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
(c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved.
</copyright> */
var Montage = require("montage").Montage,
Component = require("ui/component").Component;
var KEY_DELETE = 46,
KEY_BACKSPACE = 8,
KEY_LEFT = 37,
KEY_UP = 38,
KEY_RIGHT = 39,
KEY_DOWN = 40;
exports.TokenField = Montage.create(Component, {
delegate: {value: null},
values: {value: null},
/**
* Path to a String within an Object that is representative of the Object
*/
textPropertyPath: {value: null},
/**
* Allow ad-hoc strings (strings that do not have corresponding represented object) to be entered.
*/
allowAdHocValues: {value: null},
placeholder: {value: null},
// private
__hasFocus: {value: null},
_hasFocus: {
get: function() {
return this.__hasFocus;
},
set: function(value) {
if(value != this.__hasFocus) {
this.__hasFocus = value;
this.needsDraw = true;
}
}
},
_tokensController: {value: null},
_tokenList: {value: null, enumerable: false},
_autocomplete: {value: null, enumerable: false},
__autocompleteValue: {value: null},
_autocompleteValue: {
get: function() {
return this.__autocompleteValue;
},
set: function(value) {
this.__autocompleteValue = value;
}
},
__suggestedValue: {value: null},
_suggestedValue: {
get: function() {
return this.__suggestedValue;
},
set: function(newValue) {
if(newValue) {
var representedObject;
if(!this.allowAdHocValues && String.isString(newValue)) {
// since ad-hoc values are not allowed, check with the delegate
// if a representedObject can be found for this string
representedObject = this.callDelegateMethod('getRepresentedObject', newValue);
} else {
representedObject = newValue;
}
if(representedObject) {
this.__suggestedValue = representedObject;
// able to find a representedObject
if(!this.values) {
this.values = [];
}
this.values.push(this.__suggestedValue);
this._autocomplete.value = '';
}
}
}
},
prepareForActivationEvents: {
value: function() {
this.element.addEventListener('mouseup', this);
}
},
prepareForDraw: {
value: function() {
this._autocomplete.delegate = this.delegate;
if(this.identifier) {
this._autocomplete.identifier = this.identifier;
// @todo : this might be a problem. Since delegate methods are prefixed with
// the identifier
//this.identifier = 'token-field-' + this.identifier;
}
this._autocomplete.element.addEventListener("keyup", this);
}
},
draw: {
value: function() {
if(this._hasFocus) {
this._autocomplete.element.focus();
this.__hasFocus = false;
} else {
if(this.placeholder) {
this._autocomplete.element.style.width = 'auto';
}
}
}
},
// Event handling
handleMouseup: {
value: function(event) {
this._hasFocus = true;
}
},
handleKeyup: {
enumerable: false,
value: function(e) {
var code = e.keyCode;
//console.log('keyCode', code);
if(this.values && this.values.length > 0) {
var selectedIndexes = this._tokensController.selectedIndexes;
var selectedIndex = (selectedIndexes && selectedIndexes.length > 0 ? selectedIndexes[0] : null);
var lastIndex = this.values.length - 1, len = this.values.length;
switch(code) {
// @todo - check Keycode in Windows/Linux/Mobile browsers
case KEY_BACKSPACE:
case KEY_DELETE:
// Only remove the token if the token has already been selected
// So the behavior is to select the last token if it is not selected already.
// If selected already, then remove it
if(!this._autocompleteValue) {
// check if the selected token is the last one
if(selectedIndexes && selectedIndexes.length > 0) {
// removes the selected one
this._tokensController.remove();
} else {
this._tokensController.selectedIndexes = [this.values.length-1];
}
}
break;
case KEY_LEFT:
if(!this._autocompleteValue) {
if(selectedIndex != null) {
selectedIndex = selectedIndex - 1;
if(selectedIndex < 0) {
selectedIndex = lastIndex;
}
} else {
selectedIndex = lastIndex;
}
this._tokensController.selectedIndexes = [selectedIndex];
}
break;
case KEY_RIGHT:
if(!this._autocompleteValue) {
if(selectedIndex != null) {
selectedIndex = selectedIndex + 1;
if(selectedIndex > lastIndex) {
selectedIndex = 0;
}
} else {
selectedIndex = 0;
}
this._tokensController.selectedIndexes = [selectedIndex];
}
break;
case KEY_UP:
if(selectedIndex != null) {
this._tokensController.selectedIndexes = [0];
}
break;
case KEY_DOWN:
if(selectedIndex != null) {
this._tokensController.selectedIndexes = [lastIndex];
}
break;
default:
this._tokensController.selectedIndexes = [];
break;
}
}
}
}
});
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