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Unified Diff: chrome/browser/resources/shared/js/util.js

Issue 11962043: Move webui resources from chrome\browser\resources\shared to ui\webui\resources. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 7 years, 11 months ago
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Index: chrome/browser/resources/shared/js/util.js
===================================================================
--- chrome/browser/resources/shared/js/util.js (revision 177292)
+++ chrome/browser/resources/shared/js/util.js (working copy)
@@ -1,321 +0,0 @@
-// Copyright (c) 2012 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.
-
-/**
- * The global object.
- * @type {!Object}
- * @const
- */
-var global = this;
-
-/**
- * Alias for document.getElementById.
- * @param {string} id The ID of the element to find.
- * @return {HTMLElement} The found element or null if not found.
- */
-function $(id) {
- return document.getElementById(id);
-}
-
-/**
- * Calls chrome.send with a callback and restores the original afterwards.
- * @param {string} name The name of the message to send.
- * @param {!Array} params The parameters to send.
- * @param {string} callbackName The name of the function that the backend calls.
- * @param {!Function} callback The function to call.
- */
-function chromeSend(name, params, callbackName, callback) {
- var old = global[callbackName];
- global[callbackName] = function() {
- // restore
- global[callbackName] = old;
-
- var args = Array.prototype.slice.call(arguments);
- return callback.apply(global, args);
- };
- chrome.send(name, params);
-}
-
-/**
- * Returns the scale factors supported by this platform.
- * @return {array} The supported scale factors.
- */
-function getSupportedScaleFactors() {
- var supportedScaleFactors = [];
- if (cr.isMac || cr.isChromeOS) {
- supportedScaleFactors.push(1);
- supportedScaleFactors.push(2);
- } else {
- // Windows must be restarted to display at a different scale factor.
- supportedScaleFactors.push(window.devicePixelRatio);
- }
- return supportedScaleFactors;
-}
-
-/**
- * Generates a CSS url string.
- * @param {string} s The URL to generate the CSS url for.
- * @return {string} The CSS url string.
- */
-function url(s) {
- // http://www.w3.org/TR/css3-values/#uris
- // Parentheses, commas, whitespace characters, single quotes (') and double
- // quotes (") appearing in a URI must be escaped with a backslash
- var s2 = s.replace(/(\(|\)|\,|\s|\'|\"|\\)/g, '\\$1');
- // WebKit has a bug when it comes to URLs that end with \
- // https://bugs.webkit.org/show_bug.cgi?id=28885
- if (/\\\\$/.test(s2)) {
- // Add a space to work around the WebKit bug.
- s2 += ' ';
- }
- return 'url("' + s2 + '")';
-}
-
-/**
- * Generates a CSS -webkit-image-set for a chrome:// url.
- * An entry in the image set is added for each of getSupportedScaleFactors().
- * The scale-factor-specific url is generated by replacing the first instance of
- * 'scalefactor' in |path| with the numeric scale factor.
- * @param {string} path The URL to generate an image set for.
- * 'scalefactor' should be a substring of |path|.
- * @return {string} The CSS -webkit-image-set.
- */
-function imageset(path) {
- var supportedScaleFactors = getSupportedScaleFactors();
-
- var replaceStartIndex = path.indexOf('scalefactor');
- if (replaceStartIndex < 0)
- return url(path);
-
- var s = '';
- for (var i = 0; i < supportedScaleFactors.length; ++i) {
- var scaleFactor = supportedScaleFactors[i];
- var pathWithScaleFactor = path.substr(0, replaceStartIndex) + scaleFactor +
- path.substr(replaceStartIndex + 'scalefactor'.length);
-
- s += url(pathWithScaleFactor) + ' ' + scaleFactor + 'x';
-
- if (i != supportedScaleFactors.length - 1)
- s += ', ';
- }
- return '-webkit-image-set(' + s + ')';
-}
-
-/**
- * Parses query parameters from Location.
- * @param {string} location The URL to generate the CSS url for.
- * @return {object} Dictionary containing name value pairs for URL
- */
-function parseQueryParams(location) {
- var params = {};
- var query = unescape(location.search.substring(1));
- var vars = query.split('&');
- for (var i = 0; i < vars.length; i++) {
- var pair = vars[i].split('=');
- params[pair[0]] = pair[1];
- }
- return params;
-}
-
-function findAncestorByClass(el, className) {
- return findAncestor(el, function(el) {
- if (el.classList)
- return el.classList.contains(className);
- return null;
- });
-}
-
-/**
- * Return the first ancestor for which the {@code predicate} returns true.
- * @param {Node} node The node to check.
- * @param {function(Node) : boolean} predicate The function that tests the
- * nodes.
- * @return {Node} The found ancestor or null if not found.
- */
-function findAncestor(node, predicate) {
- var last = false;
- while (node != null && !(last = predicate(node))) {
- node = node.parentNode;
- }
- return last ? node : null;
-}
-
-function swapDomNodes(a, b) {
- var afterA = a.nextSibling;
- if (afterA == b) {
- swapDomNodes(b, a);
- return;
- }
- var aParent = a.parentNode;
- b.parentNode.replaceChild(a, b);
- aParent.insertBefore(b, afterA);
-}
-
-/**
- * Disables text selection and dragging, with optional whitelist callbacks.
- * @param {function(Event):boolean=} opt_allowSelectStart Unless this function
- * is defined and returns true, the onselectionstart event will be
- * surpressed.
- * @param {function(Event):boolean=} opt_allowDragStart Unless this function
- * is defined and returns true, the ondragstart event will be surpressed.
- */
-function disableTextSelectAndDrag(opt_allowSelectStart, opt_allowDragStart) {
- // Disable text selection.
- document.onselectstart = function(e) {
- if (!(opt_allowSelectStart && opt_allowSelectStart.call(this, e)))
- e.preventDefault();
- };
-
- // Disable dragging.
- document.ondragstart = function(e) {
- if (!(opt_allowDragStart && opt_allowDragStart.call(this, e)))
- e.preventDefault();
- };
-}
-
-/**
- * Call this to stop clicks on <a href="#"> links from scrolling to the top of
- * the page (and possibly showing a # in the link).
- */
-function preventDefaultOnPoundLinkClicks() {
- document.addEventListener('click', function(e) {
- var anchor = findAncestor(e.target, function(el) {
- return el.tagName == 'A';
- });
- // Use getAttribute() to prevent URL normalization.
- if (anchor && anchor.getAttribute('href') == '#')
- e.preventDefault();
- });
-}
-
-/**
- * Check the directionality of the page.
- * @return {boolean} True if Chrome is running an RTL UI.
- */
-function isRTL() {
- return document.documentElement.dir == 'rtl';
-}
-
-/**
- * Simple common assertion API
- * @param {*} condition The condition to test. Note that this may be used to
- * test whether a value is defined or not, and we don't want to force a
- * cast to Boolean.
- * @param {string=} opt_message A message to use in any error.
- */
-function assert(condition, opt_message) {
- 'use strict';
- if (!condition) {
- var msg = 'Assertion failed';
- if (opt_message)
- msg = msg + ': ' + opt_message;
- throw new Error(msg);
- }
-}
-
-/**
- * Get an element that's known to exist by its ID. We use this instead of just
- * calling getElementById and not checking the result because this lets us
- * satisfy the JSCompiler type system.
- * @param {string} id The identifier name.
- * @return {!Element} the Element.
- */
-function getRequiredElement(id) {
- var element = $(id);
- assert(element, 'Missing required element: ' + id);
- return element;
-}
-
-// Handle click on a link. If the link points to a chrome: or file: url, then
-// call into the browser to do the navigation.
-document.addEventListener('click', function(e) {
- // Allow preventDefault to work.
- if (!e.returnValue)
- return;
-
- var el = e.target;
- if (el.nodeType == Node.ELEMENT_NODE &&
- el.webkitMatchesSelector('A, A *')) {
- while (el.tagName != 'A') {
- el = el.parentElement;
- }
-
- if ((el.protocol == 'file:' || el.protocol == 'about:') &&
- (e.button == 0 || e.button == 1)) {
- chrome.send('navigateToUrl', [
- el.href,
- el.target,
- e.button,
- e.altKey,
- e.ctrlKey,
- e.metaKey,
- e.shiftKey
- ]);
- e.preventDefault();
- }
- }
-});
-
-/**
- * Creates a new URL which is the old URL with a GET param of key=value.
- * @param {string} url The base URL. There is not sanity checking on the URL so
- * it must be passed in a proper format.
- * @param {string} key The key of the param.
- * @param {string} value The value of the param.
- * @return {string} The new URL.
- */
-function appendParam(url, key, value) {
- var param = encodeURIComponent(key) + '=' + encodeURIComponent(value);
-
- if (url.indexOf('?') == -1)
- return url + '?' + param;
- return url + '&' + param;
-}
-
-/**
- * Creates a CSS -webkit-image-set for a favicon request.
- * @param {string} url The url for the favicon.
- * @param {number=} opt_size Optional preferred size of the favicon.
- * @param {boolean=} opt_sessionFavicon Optional flag to indicate if
- * requesting a session favicon.
- * @return {string} -webkit-image-set for the favicon.
- */
-function getFaviconImageSet(url, opt_size, opt_sessionFavicon) {
- var size = opt_size || 16;
- var type = opt_sessionFavicon ? 'session-favicon' : 'favicon';
- return imageset(
- 'chrome://' + type + '/size/' + size + '@scalefactorx/' + url);
-}
-
-/**
- * Creates a new URL for a favicon request for the current device pixel ratio.
- * The URL must be updated when the user moves the browser to a screen with a
- * different device pixel ratio. Use getFaviconImageSet() for the updating to
- * occur automatically.
- * @param {string} url The url for the favicon.
- * @param {number=} opt_size Optional preferred size of the favicon.
- * @param {boolean=} opt_sessionFavicon Optional flag to indicate if
- * requesting a session favicon.
- * @return {string} Updated URL for the favicon.
- */
-function getFaviconUrlForCurrentDevicePixelRatio(url,
- opt_size,
- opt_sessionFavicon) {
- var size = opt_size || 16;
- var type = opt_sessionFavicon ? 'session-favicon' : 'favicon';
- return 'chrome://' + type + '/size/' + size + '@' +
- window.devicePixelRatio + 'x/' + url;
-}
-
-/**
- * Creates an element of a specified type with a specified class name.
- * @param {string} type The node type.
- * @param {string} className The class name to use.
- * @return {Element} The created element.
- */
-function createElementWithClassName(type, className) {
- var elm = document.createElement(type);
- elm.className = className;
- return elm;
-}
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