зеркало из https://github.com/mozilla/gecko-dev.git
413 строки
11 KiB
JavaScript
413 строки
11 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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let Util = {
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/*
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* General purpose utilities
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*/
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getWindowUtils: function getWindowUtils(aWindow) {
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return aWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
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},
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// Recursively find all documents, including root document.
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getAllDocuments: function getAllDocuments(doc, resultSoFar) {
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resultSoFar = resultSoFar || [doc];
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if (!doc.defaultView)
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return resultSoFar;
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let frames = doc.defaultView.frames;
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if (!frames)
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return resultSoFar;
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let i;
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let currentDoc;
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for (i = 0; i < frames.length; i++) {
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currentDoc = frames[i].document;
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resultSoFar.push(currentDoc);
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this.getAllDocuments(currentDoc, resultSoFar);
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}
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return resultSoFar;
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},
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// Put the Mozilla networking code into a state that will kick the
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// auto-connection process.
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forceOnline: function forceOnline() {
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Services.io.offline = false;
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},
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/*
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* Timing utilties
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*/
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// Executes aFunc after other events have been processed.
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executeSoon: function executeSoon(aFunc) {
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Services.tm.mainThread.dispatch({
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run: function() {
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aFunc();
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}
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}, Ci.nsIThread.DISPATCH_NORMAL);
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},
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/*
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* Console printing utilities
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*/
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dumpf: function dumpf(str) {
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let args = arguments;
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let i = 1;
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dump(str.replace(/%s/g, function() {
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if (i >= args.length) {
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throw "dumps received too many placeholders and not enough arguments";
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}
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return args[i++].toString();
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}));
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},
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// Like dump, but each arg is handled and there's an automatic newline
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dumpLn: function dumpLn() {
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for (let i = 0; i < arguments.length; i++)
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dump(arguments[i] + " ");
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dump("\n");
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},
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dumpElement: function dumpElement(aElement) {
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this.dumpLn(aElement.id);
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},
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dumpElementTree: function dumpElementTree(aElement) {
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let node = aElement;
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while (node) {
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this.dumpLn("node:", node, "id:", node.id, "class:", node.classList);
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node = node.parentNode;
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}
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},
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/*
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* Element utilities
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*/
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highlightElement: function highlightElement(aElement) {
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if (aElement == null) {
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this.dumpLn("aElement is null");
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return;
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}
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aElement.style.border = "2px solid red";
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},
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getHrefForElement: function getHrefForElement(target) {
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let link = null;
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while (target) {
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if (target instanceof Ci.nsIDOMHTMLAnchorElement ||
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target instanceof Ci.nsIDOMHTMLAreaElement ||
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target instanceof Ci.nsIDOMHTMLLinkElement) {
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if (target.hasAttribute("href"))
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link = target;
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}
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target = target.parentNode;
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}
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if (link && link.hasAttribute("href"))
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return link.href;
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else
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return null;
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},
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/*
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* Rect and nsIDOMRect utilities
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*/
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pointWithinRect: function pointWithinRect(aX, aY, aRect) {
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return (aRect.left < aX && aRect.top < aY &&
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aRect.right > aX && aRect.bottom > aY);
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},
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pointWithinDOMRect: function pointWithinDOMRect(aX, aY, aRect) {
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if (!aRect.width || !aRect.height)
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return false;
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return this.pointWithinRect(aX, aY, aRect);
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},
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isEmptyDOMRect: function isEmptyDOMRect(aRect) {
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if ((aRect.bottom - aRect.top) <= 0 &&
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(aRect.right - aRect.left) <= 0)
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return true;
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return false;
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},
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// Dumps the details of a dom rect to the console
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dumpDOMRect: function dumpDOMRect(aMsg, aRect) {
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try {
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Util.dumpLn(aMsg,
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"left:" + Math.round(aRect.left) + ",",
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"top:" + Math.round(aRect.top) + ",",
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"right:" + Math.round(aRect.right) + ",",
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"bottom:" + Math.round(aRect.bottom) + ",",
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"width:" + Math.round(aRect.right - aRect.left) + ",",
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"height:" + Math.round(aRect.bottom - aRect.top) );
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} catch (ex) {
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Util.dumpLn("dumpDOMRect:", ex.message);
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}
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},
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/*
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* URIs and schemes
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*/
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makeURI: function makeURI(aURL, aOriginCharset, aBaseURI) {
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return Services.io.newURI(aURL, aOriginCharset, aBaseURI);
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},
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makeURLAbsolute: function makeURLAbsolute(base, url) {
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// Note: makeURI() will throw if url is not a valid URI
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return this.makeURI(url, null, this.makeURI(base)).spec;
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},
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isLocalScheme: function isLocalScheme(aURL) {
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return ((aURL.indexOf("about:") == 0 &&
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aURL != "about:blank" &&
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aURL != "about:empty" &&
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aURL != "about:start") ||
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aURL.indexOf("chrome:") == 0);
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},
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isOpenableScheme: function isShareableScheme(aProtocol) {
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let dontOpen = /^(mailto|javascript|news|snews)$/;
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return (aProtocol && !dontOpen.test(aProtocol));
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},
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isShareableScheme: function isShareableScheme(aProtocol) {
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let dontShare = /^(chrome|about|file|javascript|resource)$/;
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return (aProtocol && !dontShare.test(aProtocol));
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},
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// Don't display anything in the urlbar for these special URIs.
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isURLEmpty: function isURLEmpty(aURL) {
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return (!aURL ||
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aURL == "about:blank" ||
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aURL == "about:empty" ||
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aURL == "about:home" ||
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aURL == "about:start");
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},
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// Don't remember these pages in the session store.
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isURLMemorable: function isURLMemorable(aURL) {
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return !(aURL == "about:blank" ||
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aURL == "about:empty" ||
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aURL == "about:start");
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},
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/*
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* Math utilities
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*/
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clamp: function(num, min, max) {
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return Math.max(min, Math.min(max, num));
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},
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/*
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* Screen and layout utilities
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*/
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get displayDPI() {
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delete this.displayDPI;
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return this.displayDPI = this.getWindowUtils(window).displayDPI;
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},
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isPortrait: function isPortrait() {
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return (window.innerWidth <= window.innerHeight);
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},
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LOCALE_DIR_RTL: -1,
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LOCALE_DIR_LTR: 1,
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get localeDir() {
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// determine browser dir first to know which direction to snap to
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let chromeReg = Cc["@mozilla.org/chrome/chrome-registry;1"].getService(Ci.nsIXULChromeRegistry);
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return chromeReg.isLocaleRTL("global") ? this.LOCALE_DIR_RTL : this.LOCALE_DIR_LTR;
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},
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/*
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* Process utilities
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*/
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isParentProcess: function isInParentProcess() {
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let appInfo = Cc["@mozilla.org/xre/app-info;1"];
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return (!appInfo || appInfo.getService(Ci.nsIXULRuntime).processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT);
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},
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/*
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* Event utilities
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*/
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modifierMaskFromEvent: function modifierMaskFromEvent(aEvent) {
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return (aEvent.altKey ? Ci.nsIDOMEvent.ALT_MASK : 0) |
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(aEvent.ctrlKey ? Ci.nsIDOMEvent.CONTROL_MASK : 0) |
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(aEvent.shiftKey ? Ci.nsIDOMEvent.SHIFT_MASK : 0) |
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(aEvent.metaKey ? Ci.nsIDOMEvent.META_MASK : 0);
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},
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/*
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* Download utilities
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*/
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insertDownload: function insertDownload(aSrcUri, aFile) {
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let dm = Cc["@mozilla.org/download-manager;1"].getService(Ci.nsIDownloadManager);
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let db = dm.DBConnection;
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let stmt = db.createStatement(
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"INSERT INTO moz_downloads (name, source, target, startTime, endTime, state, referrer) " +
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"VALUES (:name, :source, :target, :startTime, :endTime, :state, :referrer)"
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);
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stmt.params.name = aFile.leafName;
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stmt.params.source = aSrcUri.spec;
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stmt.params.target = aFile.path;
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stmt.params.startTime = Date.now() * 1000;
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stmt.params.endTime = Date.now() * 1000;
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stmt.params.state = Ci.nsIDownloadManager.DOWNLOAD_NOTSTARTED;
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stmt.params.referrer = aSrcUri.spec;
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stmt.execute();
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stmt.finalize();
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let newItemId = db.lastInsertRowID;
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let download = dm.getDownload(newItemId);
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//dm.resumeDownload(download);
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//Services.obs.notifyObservers(download, "dl-start", null);
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},
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/*
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* Local system utilities
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*/
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createShortcut: function Util_createShortcut(aTitle, aURL, aIconURL, aType) {
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// The background images are 72px, but Android will resize as needed.
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// Bigger is better than too small.
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const kIconSize = 72;
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const kOverlaySize = 32;
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const kOffset = 20;
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// We have to fallback to something
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aTitle = aTitle || aURL;
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let canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
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canvas.setAttribute("style", "display: none");
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function _createShortcut() {
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let icon = canvas.toDataURL("image/png", "");
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canvas = null;
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try {
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let shell = Cc["@mozilla.org/browser/shell-service;1"].createInstance(Ci.nsIShellService);
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shell.createShortcut(aTitle, aURL, icon, aType);
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} catch(e) {
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Cu.reportError(e);
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}
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}
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// Load the main background image first
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let image = new Image();
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image.onload = function() {
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canvas.width = canvas.height = kIconSize;
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let ctx = canvas.getContext("2d");
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ctx.drawImage(image, 0, 0, kIconSize, kIconSize);
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// If we have a favicon, lets draw it next
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if (aIconURL) {
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let favicon = new Image();
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favicon.onload = function() {
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// Center the favicon and overlay it on the background
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ctx.drawImage(favicon, kOffset, kOffset, kOverlaySize, kOverlaySize);
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_createShortcut();
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}
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favicon.onerror = function() {
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Cu.reportError("CreateShortcut: favicon image load error");
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}
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favicon.src = aIconURL;
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} else {
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_createShortcut();
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}
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}
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image.onerror = function() {
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Cu.reportError("CreateShortcut: background image load error");
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}
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// Pick the right background
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image.src = aIconURL ? "chrome://browser/skin/images/homescreen-blank-hdpi.png"
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: "chrome://browser/skin/images/homescreen-default-hdpi.png";
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},
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};
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/*
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* Timeout
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*
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* Helper class to nsITimer that adds a little more pizazz. Callback can be an
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* object with a notify method or a function.
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*/
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Util.Timeout = function(aCallback) {
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this._callback = aCallback;
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this._timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
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this._type = null;
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};
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Util.Timeout.prototype = {
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// Timer callback. Don't call this manually.
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notify: function notify() {
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if (this._type == this._timer.TYPE_ONE_SHOT)
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this._type = null;
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if (this._callback.notify)
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this._callback.notify();
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else
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this._callback.apply(null);
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},
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// Helper function for once and interval.
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_start: function _start(aDelay, aType, aCallback) {
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if (aCallback)
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this._callback = aCallback;
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this.clear();
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this._timer.initWithCallback(this, aDelay, aType);
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this._type = aType;
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return this;
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},
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// Do the callback once. Cancels other timeouts on this object.
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once: function once(aDelay, aCallback) {
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return this._start(aDelay, this._timer.TYPE_ONE_SHOT, aCallback);
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},
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// Do the callback every aDelay msecs. Cancels other timeouts on this object.
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interval: function interval(aDelay, aCallback) {
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return this._start(aDelay, this._timer.TYPE_REPEATING_SLACK, aCallback);
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},
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// Clear any pending timeouts.
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clear: function clear() {
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if (this.isPending()) {
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this._timer.cancel();
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this._type = null;
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}
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return this;
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},
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// If there is a pending timeout, call it and cancel the timeout.
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flush: function flush() {
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if (this.isPending()) {
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this.notify();
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this.clear();
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}
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return this;
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},
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// Return true if we are waiting for a callback.
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isPending: function isPending() {
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return this._type !== null;
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}
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};
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