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/* <copyright>
Copyright (c) 2012, Motorola Mobility LLC.
All Rights Reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of Motorola Mobility LLC nor the names of its
contributors may be used to endorse or promote products derived from this
software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
</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, serializable: true},
values: {value: null, serializable: true},
/**
* Path to a String within an Object that is representative of the Object
*/
textPropertyPath: {value: null, serializable: true},
/**
* Allow ad-hoc strings (strings that do not have corresponding represented object) to be entered.
*/
allowAdHocValues: {value: null, serializable: true},
placeholder: {value: null, serializable: true},
// 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, serializable: true},
_tokenList: {value: null, serializable: true},
_autocomplete: {value: null, serializable: true},
__autocompleteValue: {value: null},
_autocompleteValue: {
serializable: true,
get: function() {
return this.__autocompleteValue;
},
set: function(value) {
this.__autocompleteValue = value;
}
},
__suggestedValue: {value: null},
_suggestedValue: {
serializable: true,
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 = '';
}
// nullify the value as autocomplete.value is empty
this.__suggestedValue = null;
}
}
},
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: {
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.removeObjectsAtSelectedIndexes();
this._tokensController.selectedIndexes = [];
} 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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