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Andreas Hocevar
2015-09-10 15:23:57 +02:00
parent 57ee7f52fd
commit 962473c3ab
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vectortile/closure-library/closure/goog/window/window.js
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// Copyright 2006 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Utilities for window manipulation.
*/
goog.provide('goog.window');
goog.require('goog.dom.TagName');
goog.require('goog.dom.safe');
goog.require('goog.html.SafeUrl');
goog.require('goog.html.uncheckedconversions');
goog.require('goog.labs.userAgent.platform');
goog.require('goog.string');
goog.require('goog.string.Const');
goog.require('goog.userAgent');
/**
* Default height for popup windows
* @type {number}
*/
goog.window.DEFAULT_POPUP_HEIGHT = 500;
/**
* Default width for popup windows
* @type {number}
*/
goog.window.DEFAULT_POPUP_WIDTH = 690;
/**
* Default target for popup windows
* @type {string}
*/
goog.window.DEFAULT_POPUP_TARGET = 'google_popup';
/**
* Opens a new window.
*
* @param {goog.html.SafeUrl|string|Object} linkRef If an Object with an 'href'
* attribute (such as HTMLAnchorElement) is passed then the value of 'href'
* is used, otherwise otherwise its toString method is called. Note that
* if a string|Object is used, an untrusted script execution might result
* (e.g. from javascript: URLs).
*
* @param {Object=} opt_options supports the following options:
* 'target': (string) target (window name). If null, linkRef.target will
* be used.
* 'width': (number) window width.
* 'height': (number) window height.
* 'top': (number) distance from top of screen
* 'left': (number) distance from left of screen
* 'toolbar': (boolean) show toolbar
* 'scrollbars': (boolean) show scrollbars
* 'location': (boolean) show location
* 'statusbar': (boolean) show statusbar
* 'menubar': (boolean) show menubar
* 'resizable': (boolean) resizable
* 'noreferrer': (boolean) whether to attempt to remove the referrer header
* from the request headers. Does this by opening a blank window that
* then redirects to the target url, so users may see some flickering.
*
* @param {Window=} opt_parentWin Parent window that should be used to open the
* new window.
*
* @return {Window} Returns the window object that was opened. This returns
* null if a popup blocker prevented the window from being
* opened. In case when a new window is opened in a different
* browser sandbox (such as iOS standalone mode), the returned
* object is a emulated Window object that functions as if
* a cross-origin window has been opened.
*/
goog.window.open = function(linkRef, opt_options, opt_parentWin) {
if (!opt_options) {
opt_options = {};
}
var parentWin = opt_parentWin || window;
var url;
if (linkRef instanceof goog.html.SafeUrl) {
url = goog.html.SafeUrl.unwrap(linkRef);
} else {
// HTMLAnchorElement has a toString() method with the same behavior as
// goog.Uri in all browsers except for Safari, which returns
// '[object HTMLAnchorElement]'. We check for the href first, then
// assume that it's a goog.Uri or String otherwise.
url = typeof linkRef.href != 'undefined' ? linkRef.href : String(linkRef);
}
var target = opt_options.target || linkRef.target;
var sb = [];
for (var option in opt_options) {
switch (option) {
case 'width':
case 'height':
case 'top':
case 'left':
sb.push(option + '=' + opt_options[option]);
break;
case 'target':
case 'noreferrer':
break;
default:
sb.push(option + '=' + (opt_options[option] ? 1 : 0));
}
}
var optionString = sb.join(',');
var newWin;
if (goog.labs.userAgent.platform.isIos() &&
parentWin.navigator && parentWin.navigator['standalone'] &&
target && target != '_self') {
// iOS in standalone mode disregards "target" in window.open and always
// opens new URL in the same window. The workout around is to create an "A"
// element and send a click event to it.
// Notice that the "A" tag does NOT have to be added to the DOM.
var a = parentWin.document.createElement(goog.dom.TagName.A);
// TODO(user): Sanitize URL. See cl/89965465 for code and test which
// was reverted.
a.setAttribute('href', url);
a.setAttribute('target', target);
if (opt_options['noreferrer']) {
a.setAttribute('rel', 'noreferrer');
}
var click = document.createEvent('MouseEvent');
click.initMouseEvent('click',
true, // canBubble
true, // cancelable
parentWin,
1); // detail = mousebutton
a.dispatchEvent(click);
// New window is not available in this case. Instead, a fake Window object
// is returned. In particular, it will have window.document undefined. In
// general, it will appear to most of clients as a Window for a different
// origin. Since iOS standalone web apps are run in their own sandbox, this
// is the most appropriate return value.
newWin = /** @type {!Window} */ ({});
} else if (opt_options['noreferrer']) {
// Use a meta-refresh to stop the referrer from being included in the
// request headers. This seems to be the only cross-browser way to
// remove the referrer. It also allows for the opener to be set to null
// in the new window, thus disallowing the opened window from navigating
// its opener.
//
// Detecting user agent and then using a different strategy per browser
// would allow the referrer to leak in case of an incorrect/missing user
// agent.
newWin = parentWin.open('', target, optionString);
if (newWin) {
if (goog.userAgent.IE) {
// IE has problems parsing the content attribute if the url contains
// a semicolon. We can fix this by adding quotes around the url, but
// then we can't parse quotes in the URL correctly. We take a
// best-effort approach.
//
// If the URL has semicolons, wrap it in single quotes to protect
// the semicolons.
// If the URL has semicolons and single quotes, url-encode the single
// quotes as well.
//
// This is imperfect. Notice that both ' and ; are reserved characters
// in URIs, so this could do the wrong thing, but at least it will
// do the wrong thing in only rare cases.
// ugh.
if (goog.string.contains(url, ';')) {
url = "'" + url.replace(/'/g, '%27') + "'";
}
}
newWin.opener = null;
var escapedUrl = goog.string.htmlEscape(url);
var safeHtml = goog.html.uncheckedconversions
.safeHtmlFromStringKnownToSatisfyTypeContract(
goog.string.Const.from('b/12014412, meta tag with sanitized URL'),
'<META HTTP-EQUIV="refresh" content="0; url=' +
escapedUrl + '">');
goog.dom.safe.documentWrite(newWin.document, safeHtml);
newWin.document.close();
}
} else {
newWin = parentWin.open(url, target, optionString);
}
// newWin is null if a popup blocker prevented the window open.
return newWin;
};
/**
* Opens a new window without any real content in it.
*
* This can be used to get around popup blockers if you need to open a window
* in response to a user event, but need to do asynchronous work to determine
* the URL to open, and then set the URL later.
*
* Example usage:
*
* var newWin = goog.window.openBlank('Loading...');
* setTimeout(
* function() {
* newWin.location.href = 'http://www.google.com';
* }, 100);
*
* @param {string=} opt_message String to show in the new window. This string
* will be HTML-escaped to avoid XSS issues.
* @param {Object=} opt_options Options to open window with.
* {@see goog.window.open for exact option semantics}.
* @param {Window=} opt_parentWin Parent window that should be used to open the
* new window.
* @return {Window} Returns the window object that was opened. This returns
* null if a popup blocker prevented the window from being
* opened.
*/
goog.window.openBlank = function(opt_message, opt_options, opt_parentWin) {
// Open up a window with the loading message and nothing else.
// This will be interpreted as HTML content type with a missing doctype
// and html/body tags, but is otherwise acceptable.
//
// IMPORTANT: The order of escaping is crucial here in order to avoid XSS.
// First, HTML-escaping is needed because the result of the JS expression
// is evaluated as HTML. Second, JS-string escaping is needed; this avoids
// \u escaping from inserting HTML tags and \ from escaping the final ".
// Finally, URL percent-encoding is done with encodeURI(); this
// avoids percent-encoding from bypassing HTML and JS escaping.
//
// Note: There are other ways the same result could be achieved but the
// current behavior was preserved when this code was refactored to use
// SafeUrl, in order to avoid breakage.
var loadingMessage;
if (!opt_message) {
loadingMessage = '';
} else {
loadingMessage =
goog.string.escapeString(goog.string.htmlEscape(opt_message));
}
var url = goog.html.uncheckedconversions
.safeUrlFromStringKnownToSatisfyTypeContract(
goog.string.Const.from(
'b/12014412, encoded string in javascript: URL'),
'javascript:"' + encodeURI(loadingMessage) + '"');
return /** @type {Window} */ (goog.window.open(
url, opt_options, opt_parentWin));
};
/**
* Raise a help popup window, defaulting to "Google standard" size and name.
*
* (If your project is using GXPs, consider using {@link PopUpLink.gxp}.)
*
* @param {goog.html.SafeUrl|string|Object} linkRef If an Object with an 'href'
* attribute (such as HTMLAnchorElement) is passed then the value of 'href'
* is used, otherwise otherwise its toString method is called. Note that
* if a string|Object is used, an untrusted script execution might result
* (e.g. from javascript: URLs).
*
* @param {Object=} opt_options Options to open window with.
* {@see goog.window.open for exact option semantics}
* Additional wrinkles to the options:
* - if 'target' field is null, linkRef.target will be used. If *that's*
* null, the default is "google_popup".
* - if 'width' field is not specified, the default is 690.
* - if 'height' field is not specified, the default is 500.
*
* @return {boolean} true if the window was not popped up, false if it was.
*/
goog.window.popup = function(linkRef, opt_options) {
if (!opt_options) {
opt_options = {};
}
// set default properties
opt_options['target'] = opt_options['target'] ||
linkRef['target'] || goog.window.DEFAULT_POPUP_TARGET;
opt_options['width'] = opt_options['width'] ||
goog.window.DEFAULT_POPUP_WIDTH;
opt_options['height'] = opt_options['height'] ||
goog.window.DEFAULT_POPUP_HEIGHT;
var newWin = goog.window.open(linkRef, opt_options);
if (!newWin) {
return true;
}
newWin.focus();
return false;
};