happstack-yui-7372.5.1: bundle/autocomplete-list-keys/autocomplete-list-keys-coverage.js
/*
YUI 3.7.2 (build 5639)
Copyright 2012 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/
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YUI.add('autocomplete-list-keys', function (Y, NAME) {
/**
Mixes keyboard support into AutoCompleteList. By default, this module is not
loaded for iOS and Android devices.
@module autocomplete
@submodule autocomplete-list-keys
**/
// keyCode constants.
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var KEY_DOWN = 40,
KEY_ENTER = 13,
KEY_ESC = 27,
KEY_TAB = 9,
KEY_UP = 38;
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function ListKeys() {
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Y.before(this._bindKeys, this, 'bindUI');
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this._initKeys();
}
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ListKeys.prototype = {
// -- Lifecycle Methods ----------------------------------------------------
/**
Initializes keyboard command mappings.
@method _initKeys
@protected
@for AutoCompleteList
**/
_initKeys: function () {
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var keys = {},
keysVisible = {};
// Register keyboard command handlers. _keys contains handlers that will
// always be called; _keysVisible contains handlers that will only be
// called when the list is visible.
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keys[KEY_DOWN] = this._keyDown;
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keysVisible[KEY_ENTER] = this._keyEnter;
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keysVisible[KEY_ESC] = this._keyEsc;
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keysVisible[KEY_TAB] = this._keyTab;
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keysVisible[KEY_UP] = this._keyUp;
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this._keys = keys;
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this._keysVisible = keysVisible;
},
destructor: function () {
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this._unbindKeys();
},
/**
Binds keyboard events.
@method _bindKeys
@protected
**/
_bindKeys: function () {
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this._keyEvents = this._inputNode.on('keydown', this._onInputKey, this);
},
/**
Unbinds keyboard events.
@method _unbindKeys
@protected
**/
_unbindKeys: function () {
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this._keyEvents && this._keyEvents.detach();
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this._keyEvents = null;
},
// -- Protected Methods ----------------------------------------------------
/**
Called when the down arrow key is pressed.
@method _keyDown
@protected
**/
_keyDown: function () {
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if (this.get('visible')) {
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this._activateNextItem();
} else {
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this.show();
}
},
/**
Called when the enter key is pressed.
@method _keyEnter
@protected
**/
_keyEnter: function (e) {
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var item = this.get('activeItem');
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if (item) {
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this.selectItem(item, e);
} else {
// Don't prevent form submission when there's no active item.
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return false;
}
},
/**
Called when the escape key is pressed.
@method _keyEsc
@protected
**/
_keyEsc: function () {
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this.hide();
},
/**
Called when the tab key is pressed.
@method _keyTab
@protected
**/
_keyTab: function (e) {
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var item;
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if (this.get('tabSelect')) {
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item = this.get('activeItem');
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if (item) {
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this.selectItem(item, e);
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return true;
}
}
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return false;
},
/**
Called when the up arrow key is pressed.
@method _keyUp
@protected
**/
_keyUp: function () {
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this._activatePrevItem();
},
// -- Protected Event Handlers ---------------------------------------------
/**
Handles `inputNode` key events.
@method _onInputKey
@param {EventTarget} e
@protected
**/
_onInputKey: function (e) {
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var handler,
keyCode = e.keyCode;
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this._lastInputKey = keyCode;
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if (this.get('results').length) {
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handler = this._keys[keyCode];
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if (!handler && this.get('visible')) {
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handler = this._keysVisible[keyCode];
}
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if (handler) {
// A handler may return false to indicate that it doesn't wish
// to prevent the default key behavior.
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if (handler.call(this, e) !== false) {
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e.preventDefault();
}
}
}
}
};
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Y.Base.mix(Y.AutoCompleteList, [ListKeys]);
}, '3.7.2', {"requires": ["autocomplete-list", "base-build"]});