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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.
-
- 'use strict';
-
- privateScriptController.installClass('PluginPlaceholderElement', function(PluginPlaceholderElementPrototype) {
- // FIXME: Load this from a .css file.
- var styleSource =
- '#plugin-placeholder {' +
- ' all: initial;' +
- ' width: 100%;' +
- ' height: 100%;' +
- ' overflow: hidden;' +
- ' display: flex;' +
- ' align-items: center;' +
- ' background: gray;' +
- ' font: 12px -webkit-control;' +
- '}' +
- '#plugin-placeholder-content {' +
- ' text-align: center;' +
- ' margin: auto;' +
- '}';
-
- PluginPlaceholderElementPrototype.createdCallback = function() {
- this.id = 'plugin-placeholder';
-
- var styleElement = document.createElement('style');
- styleElement.textContent = styleSource;
-
- var contentElement = document.createElement('div');
- contentElement.id = 'plugin-placeholder-content';
-
- var messageElement = document.createElement('div');
- messageElement.id = 'plugin-placeholder-message';
-
- // FIXME: UI polish, l10n, etc. for the close button.
- var closeButton = document.createElement('button');
- closeButton.id = 'plugin-placeholder-close-button';
- closeButton.textContent = 'Close';
- closeButton.style.display = 'none';
- closeButton.addEventListener('click', function() {
- // FIXME: Record UMA Plugin_Hide_Click.
- this.hide();
- }.bind(this));
-
- contentElement.appendChild(messageElement);
- contentElement.appendChild(closeButton);
- this.appendChild(styleElement);
- this.appendChild(contentElement);
-
- this.messageElement = messageElement;
- this.closeButton = closeButton;
- };
-
- PluginPlaceholderElementPrototype.hide = function() {
- var host = (this.parentNode instanceof ShadowRoot) ? this.parentNode.host : this;
- host.style.display = 'none';
-
- // If we have a width and height, search for a parent (often <div>) with the
- // same dimensions. If we find such a parent, hide that as well.
- // This makes much more uncovered page content usable (including clickable)
- // as opposed to merely visible.
- // TODO(cevans) -- it's a foul heuristic but we're going to tolerate it for
- // now for these reasons:
- // 1) Makes the user experience better.
- // 2) Foulness is encapsulated within this single function.
- // 3) Confidence in no false positives.
- // 4) Seems to have a good / low false negative rate at this time.
- //
- // This heuristic was copied from plugins::PluginPlaceholder::HidePlugin
- // (src/components/plugins/renderer/plugin_placeholder.cc) and should be
- // kept in sync with it until it goes away.
- if (host.hasAttribute('width') && host.hasAttribute('height')) {
- var presentationAttributeInPixels = function(attr) {
- var match = host.getAttribute(attr).match(/^\s*(\d+)\s*(px)?\s*$/);
- if (match)
- return match[1] + 'px';
- };
- var width = presentationAttributeInPixels('width');
- var height = presentationAttributeInPixels('height');
- if (!width || !height)
- return;
-
- var element = host;
- while (element instanceof Element) {
- if (element.style.width == width && element.style.height == height)
- element.style.display = 'none';
- element = element.parentNode;
- }
- }
- };
-
- Object.defineProperty(PluginPlaceholderElementPrototype, 'message', {
- get: function() { return this.messageElement.textContent; },
- set: function(message) { this.messageElement.textContent = message; },
- });
-
- Object.defineProperty(PluginPlaceholderElementPrototype, 'closeable', {
- get: function() { return this.closeButton.style.display != 'none'; },
- set: function(closeable) { this.closeButton.style.display = closeable ? '' : 'none'; },
- });
- });
-