// Copyright 2015 The ChromeOS IME Authors. All Rights Reserved.
// limitations under the License.
// See the License for the specific language governing permissions and
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// distributed under the License is distributed on an "AS-IS" BASIS,
// Unless required by applicable law or agreed to in writing, software
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// You may obtain a copy of the License at
// you may not use this file except in compliance with the License.
// Licensed under the Apache License, Version 2.0 (the "License");
//
goog.provide('i18n.input.chrome.inputview.elements.content.GesturePreviewView');
goog.require('goog.dom.classlist');
goog.require('goog.object');
goog.require('goog.style');
goog.require('i18n.input.chrome.inputview.Css');
goog.require('i18n.input.chrome.inputview.elements.Element');
goog.require('i18n.input.chrome.inputview.elements.ElementType');
goog.scope(function() {
var ElementType = i18n.input.chrome.inputview.elements.ElementType;
/**
* Converts cooridnate in the keyboard window to coordinate in screen.
*
* @param {goog.math.Coordinate} coordinate The coordinate in keyboard window.
* @return {goog.math.Coordinate} The cooridnate in screen.
*/
function convertToScreenCoordinate(coordinate) {
var screenCoordinate = coordinate.clone();
// This is a hack. Ideally, we should be able to use window.screenX/Y to get
// cooridnate of the top left corner of VK window. But VK window is special
// and the values are set to 0 all the time. We should fix the problem in
// Chrome.
screenCoordinate.y += screen.height - window.innerHeight;
return screenCoordinate;
};
/**
* The view for the gesture preview.
*
* @param {goog.events.EventTarget=} opt_eventTarget The parent event target.
* @constructor
* @extends {i18n.input.chrome.inputview.elements.Element}
*/
i18n.input.chrome.inputview.elements.content.GesturePreviewView = function(
opt_eventTarget) {
goog.base(this, '', ElementType.GESTURE_PREVIEW_VIEW, opt_eventTarget);
/**
* The window that shows the gesture preview.
*
* @type {chrome.app.window.AppWindow}
* @private
*/
this.gesturePreviewWindow_ = null;
};
goog.inherits(i18n.input.chrome.inputview.elements.content.GesturePreviewView,
i18n.input.chrome.inputview.elements.Element);
var GesturePreviewView = i18n.input.chrome.inputview.elements.content.
GesturePreviewView;
/**
* The URL of the window which displays the gesture preview.
*
* @const {string}
* @private
*/
GesturePreviewView.GESTURE_PREVIEW_URL_ = 'imewindows/gesturepreview.html';
/**
* The ID of the floating window created by this view.
*
* @const {string}
* @private
*/
GesturePreviewView.WINDOW_ID_ = 'gesture_preview_window';
/**
* True if show was called and false if hide was called.
*
* @type {boolean}
* @private
*/
GesturePreviewView.prototype.visible_ = false;
/** @override */
GesturePreviewView.prototype.createDom = function() {
goog.base(this, 'createDom');
// This class does not have any DOM in the input view.
};
/**
* Shows gesture preview window.
*
* @param {!string} word The word to display in the preview window.
*/
GesturePreviewView.prototype.show = function(word) {
if (!(chrome.app.window && chrome.app.window.create)) {
// If the IME window is not available, do not show anything at all.
return;
}
if (this.gesturePreviewWindow_ &&
this.gesturePreviewWindow_.contentWindow.gesturePreview) {
// If the window was already created, just update and show it.
this.gesturePreviewWindow_.contentWindow.gesturePreview.setPreviewWord(
word);
this.gesturePreviewWindow_.show();
this.visible_ = true;
return;
}
this.visible_ = true;
// TODO: Use convertToScreenCoordinate from altDataView to determine the
// correct place to initially position the window.
var windowBounds = goog.object.create('left', 0, 'top', 0, 'width', 140,
'height', 40);
var self = this;
inputview.createWindow(
chrome.runtime.getURL(GesturePreviewView.GESTURE_PREVIEW_URL_),
goog.object.create('outerBounds', windowBounds, 'frame', 'none',
'hidden', true, 'alphaEnabled', true,
// Set the optional id parameter to ensure a unique window is created.
'id', GesturePreviewView.WINDOW_ID_),
function(newWindow) {
self.gesturePreviewWindow_ = newWindow;
var contentWindow = self.gesturePreviewWindow_.contentWindow;
contentWindow.addEventListener('load', function() {
contentWindow.gesturePreview.setPreviewWord(word);
// Function hide maybe called before loading complete. Do not show
// the window in this case.
if (self.visible_) {
self.gesturePreviewWindow_.show();
} else {
self.hide();
}
});
});
};
/**
* Hides the gesture preview window.
*/
GesturePreviewView.prototype.hide = function() {
this.visible_ = false;
if (this.gesturePreviewWindow_) {
this.gesturePreviewWindow_.close();
this.gesturePreviewWindow_ = null;
}
goog.style.setElementShown(this.getElement(), false);
};
/** @override */
GesturePreviewView.prototype.resize = function(width, height) {
goog.base(this, 'resize', width, height);
this.hide();
};
}); // goog.scope