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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
cr.define('extensions', function() {
'use strict';
/**
* The ExtensionOptionsOverlay will show an extension's options page using
* an <extensionoptions> element.
* @constructor
*/
function ExtensionOptionsOverlay() {}
cr.addSingletonGetter(ExtensionOptionsOverlay);
ExtensionOptionsOverlay.prototype = {
/**
* The function that shows the given element in the overlay.
* @type {?function(HTMLDivElement)} Function that receives the element to
* show in the overlay.
* @private
*/
showOverlay_: null,
/**
* The id of the extension that this options page display.
* @type {string}
* @private
*/
extensionId_: '',
/**
* Initialize the page.
* @param {function(HTMLDivElement)} showOverlay The function to show or
* hide the ExtensionOptionsOverlay; this should take a single parameter
* which is either the overlay Div if the overlay should be displayed,
* or null if the overlay should be hidden.
*/
initializePage: function(showOverlay) {
var overlay = $('overlay');
cr.ui.overlay.setupOverlay(overlay);
cr.ui.overlay.globalInitialization();
overlay.addEventListener('cancelOverlay', this.handleDismiss_.bind(this));
this.showOverlay_ = showOverlay;
},
setInitialFocus: function() {
this.getExtensionOptions_().focus();
},
/**
* @return {?Element}
* @private
*/
getExtensionOptions_: function() {
return $('extension-options-overlay-guest').querySelector(
'extensionoptions');
},
/**
* Handles a click on the close button.
* @param {Event} event The click event.
* @private
*/
handleDismiss_: function(event) {
this.setVisible_(false);
var extensionoptions = this.getExtensionOptions_();
if (extensionoptions)
$('extension-options-overlay-guest').removeChild(extensionoptions);
$('extension-options-overlay-icon').removeAttribute('src');
},
/**
* Associate an extension with the overlay and display it.
* @param {string} extensionId The id of the extension whose options page
* should be displayed in the overlay.
* @param {string} extensionName The name of the extension, which is used
* as the header of the overlay.
* @param {string} extensionIcon The URL of the extension's icon.
* @param {function():void} shownCallback A function called when
* showing completes.
* @suppress {checkTypes}
* TODO(vitalyp): remove the suppression after adding
* chrome/renderer/resources/extensions/extension_options.js
* to dependencies.
*/
setExtensionAndShow: function(extensionId,
extensionName,
extensionIcon,
shownCallback) {
var overlay = $('extension-options-overlay');
var overlayHeader = $('extension-options-overlay-header');
var overlayGuest = $('extension-options-overlay-guest');
var overlayStyle = window.getComputedStyle(overlay);
$('extension-options-overlay-title').textContent = extensionName;
$('extension-options-overlay-icon').src = extensionIcon;
this.setVisible_(true);
var extensionoptions = new window.ExtensionOptions();
extensionoptions.extension = extensionId;
this.extensionId_ = extensionId;
// The <extensionoptions> content's size needs to be restricted to the
// bounds of the overlay window. The overlay gives a minWidth and
// maxHeight, but the maxHeight does not include our header height (title
// and close button), so we need to subtract that to get the maxHeight
// for the extension options.
var maxHeight = parseInt(overlayStyle.maxHeight, 10) -
overlayHeader.offsetHeight;
var minWidth = parseInt(overlayStyle.minWidth, 10);
extensionoptions.onclose = function() {
cr.dispatchSimpleEvent($('overlay'), 'cancelOverlay');
}.bind(this);
// Track the current animation (used to grow/shrink the overlay content),
// if any. Preferred size changes can fire more rapidly than the
// animation speed, and multiple animations running at the same time has
// undesirable effects.
var animation = null;
/**
* Resize the overlay if the <extensionoptions> changes preferred size.
* @param {{width: number, height: number}} evt
*/
extensionoptions.onpreferredsizechanged = function(evt) {
var oldOverlayWidth = parseInt(overlayStyle.width, 10);
var oldOverlayHeight = parseInt(overlayStyle.height, 10);
var newOverlayWidth = Math.max(evt.width, minWidth);
// |evt.height| is just the new overlay guest height, and does not
// include the overlay header height, so it needs to be added.
var newOverlayHeight =
Math.min(evt.height + overlayHeader.offsetHeight, maxHeight);
// animationTime is the amount of time in ms that will be used to resize
// the overlay. It is calculated by multiplying the pythagorean distance
// between old and the new size (in px) with a constant speed of
// 0.25 ms/px.
var loading = document.documentElement.classList.contains('loading');
var animationTime = loading ? 0 :
0.25 * Math.sqrt(Math.pow(newOverlayWidth - oldOverlayWidth, 2) +
Math.pow(newOverlayHeight - oldOverlayHeight, 2));
if (animation)
animation.cancel();
// The header height must be added to the (old and new) preferred
// heights to get the full overlay heights.
animation = overlay.animate([
{width: oldOverlayWidth + 'px', height: oldOverlayHeight + 'px'},
{width: newOverlayWidth + 'px', height: newOverlayHeight + 'px'}
], {
duration: animationTime,
delay: 0
});
animation.onfinish = function(e) {
animation = null;
// The <extensionoptions> element is ready to place back in the
// overlay. Make sure that it's sized to take up the full width/height
// of the overlay.
overlayGuest.style.position = '';
overlayGuest.style.left = '';
overlayGuest.style.width = newOverlayWidth + 'px';
// |newOverlayHeight| includes the header height, so it needs to be
// subtracted to get the new guest height.
overlayGuest.style.height =
(newOverlayHeight - overlayHeader.offsetHeight) + 'px';
if (shownCallback) {
shownCallback();
shownCallback = null;
}
};
}.bind(this);
// Move the <extensionoptions> off screen until the overlay is ready.
overlayGuest.style.position = 'fixed';
overlayGuest.style.left = window.outerWidth + 'px';
// Begin rendering at the default dimensions. This is also necessary to
// cancel any width/height set on a previous render.
// TODO(kalman): This causes a visual jag where the overlay guest shows
// up briefly. It would be better to render this off-screen first, then
// swap it in place. See crbug.com/408274.
// This may also solve crbug.com/431001 (width is 0 on initial render).
overlayGuest.style.width = '';
overlayGuest.style.height = '';
overlayGuest.appendChild(extensionoptions);
},
/**
* Dispatches a 'cancelOverlay' event on the $('overlay') element.
*/
close: function() {
cr.dispatchSimpleEvent($('overlay'), 'cancelOverlay');
},
/**
* Returns extension id that this options page set.
* @return {string}
*/
getExtensionId: function() {
return this.extensionId_;
},
/**
* Toggles the visibility of the ExtensionOptionsOverlay.
* @param {boolean} isVisible Whether the overlay should be visible.
* @private
*/
setVisible_: function(isVisible) {
this.showOverlay_(isVisible ?
/** @type {HTMLDivElement} */($('extension-options-overlay')) :
null);
}
};
// Export
return {
ExtensionOptionsOverlay: ExtensionOptionsOverlay
};
});
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