408 lines
14 KiB
JavaScript
408 lines
14 KiB
JavaScript
/* -*- mode: js; indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* 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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"use strict";
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this.EXPORTED_SYMBOLS = [ "BrowserUtils" ];
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const {interfaces: Ci, utils: Cu, classes: Cc} = Components;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.importGlobalProperties(['URL']);
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this.BrowserUtils = {
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/**
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* Prints arguments separated by a space and appends a new line.
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*/
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dumpLn: function (...args) {
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for (let a of args)
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dump(a + " ");
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dump("\n");
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},
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/**
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* restartApplication: Restarts the application, keeping it in
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* safe mode if it is already in safe mode.
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*/
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restartApplication: function() {
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let appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
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.getService(Ci.nsIAppStartup);
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let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"]
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.createInstance(Ci.nsISupportsPRBool);
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Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");
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if (cancelQuit.data) { // The quit request has been canceled.
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return false;
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}
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//if already in safe mode restart in safe mode
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if (Services.appinfo.inSafeMode) {
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appStartup.restartInSafeMode(Ci.nsIAppStartup.eAttemptQuit | Ci.nsIAppStartup.eRestart);
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return;
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}
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appStartup.quit(Ci.nsIAppStartup.eAttemptQuit | Ci.nsIAppStartup.eRestart);
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},
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/**
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* urlSecurityCheck: JavaScript wrapper for checkLoadURIWithPrincipal
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* and checkLoadURIStrWithPrincipal.
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* If |aPrincipal| is not allowed to link to |aURL|, this function throws with
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* an error message.
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*
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* @param aURL
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* The URL a page has linked to. This could be passed either as a string
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* or as a nsIURI object.
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* @param aPrincipal
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* The principal of the document from which aURL came.
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* @param aFlags
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* Flags to be passed to checkLoadURIStr. If undefined,
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* nsIScriptSecurityManager.STANDARD will be passed.
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*/
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urlSecurityCheck: function(aURL, aPrincipal, aFlags) {
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var secMan = Services.scriptSecurityManager;
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if (aFlags === undefined) {
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aFlags = secMan.STANDARD;
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}
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try {
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if (aURL instanceof Ci.nsIURI)
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secMan.checkLoadURIWithPrincipal(aPrincipal, aURL, aFlags);
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else
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secMan.checkLoadURIStrWithPrincipal(aPrincipal, aURL, aFlags);
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} catch (e) {
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let principalStr = "";
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try {
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principalStr = " from " + aPrincipal.URI.spec;
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}
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catch(e2) { }
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throw "Load of " + aURL + principalStr + " denied.";
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}
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},
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/**
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* Constructs a new URI, using nsIIOService.
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* @param aURL The URI spec.
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* @param aOriginCharset The charset of the URI.
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* @param aBaseURI Base URI to resolve aURL, or null.
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* @return an nsIURI object based on aURL.
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*/
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makeURI: function(aURL, aOriginCharset, aBaseURI) {
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return Services.io.newURI(aURL, aOriginCharset, aBaseURI);
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},
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makeFileURI: function(aFile) {
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return Services.io.newFileURI(aFile);
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},
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makeURIFromCPOW: function(aCPOWURI) {
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return Services.io.newURI(aCPOWURI.spec, aCPOWURI.originCharset, null);
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},
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/**
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* For a given DOM element, returns its position in "screen"
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* coordinates. In a content process, the coordinates returned will
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* be relative to the left/top of the tab. In the chrome process,
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* the coordinates are relative to the user's screen.
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*/
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getElementBoundingScreenRect: function(aElement) {
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let rect = aElement.getBoundingClientRect();
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let window = aElement.ownerDocument.defaultView;
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// We need to compensate for any iframes that might shift things
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// over. We also need to compensate for zooming.
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let fullZoom = window.getInterface(Ci.nsIDOMWindowUtils).fullZoom;
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rect = {
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left: (rect.left + window.mozInnerScreenX) * fullZoom,
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top: (rect.top + window.mozInnerScreenY) * fullZoom,
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width: rect.width * fullZoom,
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height: rect.height * fullZoom
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};
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return rect;
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},
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/**
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* Given an element potentially within a subframe, calculate the offsets
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* up to the top level browser.
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*
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* @param aTopLevelWindow content window to calculate offsets to.
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* @param aElement The element in question.
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* @return [targetWindow, offsetX, offsetY]
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*/
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offsetToTopLevelWindow: function (aTopLevelWindow, aElement) {
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let offsetX = 0;
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let offsetY = 0;
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let element = aElement;
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while (element &&
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element.ownerDocument &&
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element.ownerDocument.defaultView != aTopLevelWindow) {
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element = element.ownerDocument.defaultView.frameElement;
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let rect = element.getBoundingClientRect();
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offsetX += rect.left;
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offsetY += rect.top;
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}
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let win = null;
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if (element == aElement)
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win = aTopLevelWindow;
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else
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win = element.contentDocument.defaultView;
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return { targetWindow: win, offsetX: offsetX, offsetY: offsetY };
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},
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onBeforeLinkTraversal: function(originalTarget, linkURI, linkNode, isAppTab) {
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// Don't modify non-default targets or targets that aren't in top-level app
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// tab docshells (isAppTab will be false for app tab subframes).
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if (originalTarget != "" || !isAppTab)
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return originalTarget;
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// External links from within app tabs should always open in new tabs
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// instead of replacing the app tab's page (Bug 575561)
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let linkHost;
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let docHost;
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try {
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linkHost = linkURI.host;
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docHost = linkNode.ownerDocument.documentURIObject.host;
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} catch(e) {
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// nsIURI.host can throw for non-nsStandardURL nsIURIs.
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// If we fail to get either host, just return originalTarget.
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return originalTarget;
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}
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if (docHost == linkHost)
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return originalTarget;
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// Special case: ignore "www" prefix if it is part of host string
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let [longHost, shortHost] =
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linkHost.length > docHost.length ? [linkHost, docHost] : [docHost, linkHost];
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if (longHost == "www." + shortHost)
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return originalTarget;
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return "_blank";
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},
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/**
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* Map the plugin's name to a filtered version more suitable for UI.
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*
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* @param aName The full-length name string of the plugin.
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* @return the simplified name string.
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*/
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makeNicePluginName: function (aName) {
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if (aName == "Shockwave Flash")
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return "Adobe Flash";
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// Regex checks if aName begins with "Java" + non-letter char
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if (/^Java\W/.exec(aName))
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return "Java";
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// Clean up the plugin name by stripping off parenthetical clauses,
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// trailing version numbers or "plugin".
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// EG, "Foo Bar (Linux) Plugin 1.23_02" --> "Foo Bar"
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// Do this by first stripping the numbers, etc. off the end, and then
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// removing "Plugin" (and then trimming to get rid of any whitespace).
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// (Otherwise, something like "Java(TM) Plug-in 1.7.0_07" gets mangled)
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let newName = aName.replace(/\(.*?\)/g, "").
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replace(/[\s\d\.\-\_\(\)]+$/, "").
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replace(/\bplug-?in\b/i, "").trim();
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return newName;
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},
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/**
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* Return true if linkNode has a rel="noreferrer" attribute.
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*
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* @param linkNode The <a> element, or null.
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* @return a boolean indicating if linkNode has a rel="noreferrer" attribute.
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*/
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linkHasNoReferrer: function (linkNode) {
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// A null linkNode typically means that we're checking a link that wasn't
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// provided via an <a> link, like a text-selected URL. Don't leak
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// referrer information in this case.
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if (!linkNode)
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return true;
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let rel = linkNode.getAttribute("rel");
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if (!rel)
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return false;
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// The HTML spec says that rel should be split on spaces before looking
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// for particular rel values.
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let values = rel.split(/[ \t\r\n\f]/);
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return values.indexOf('noreferrer') != -1;
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},
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/**
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* Returns true if |mimeType| is text-based, or false otherwise.
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*
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* @param mimeType
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* The MIME type to check.
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*/
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mimeTypeIsTextBased: function(mimeType) {
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return mimeType.startsWith("text/") ||
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mimeType.endsWith("+xml") ||
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mimeType == "application/x-javascript" ||
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mimeType == "application/javascript" ||
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mimeType == "application/json" ||
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mimeType == "application/xml" ||
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mimeType == "mozilla.application/cached-xul";
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},
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/**
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* Return true if we can/should FAYT for this node + window (could be CPOW):
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*
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* @param elt
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* The element that is focused
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* @param win
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* The window that is focused
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*
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*/
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shouldFastFind: function(elt, win) {
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if (elt) {
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if (elt instanceof win.HTMLInputElement && elt.mozIsTextField(false))
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return false;
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if (elt.isContentEditable || win.document.designMode == "on")
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return false;
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if (elt instanceof win.HTMLTextAreaElement ||
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elt instanceof win.HTMLSelectElement ||
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elt instanceof win.HTMLObjectElement ||
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elt instanceof win.HTMLEmbedElement)
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return false;
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}
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if (win && !this.mimeTypeIsTextBased(win.document.contentType))
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return false;
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// disable FAYT in about:blank to prevent FAYT opening unexpectedly.
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let loc = win.location;
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if (loc.href == "about:blank")
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return false;
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// disable FAYT in documents that ask for it to be disabled.
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if ((loc.protocol == "about:" || loc.protocol == "chrome:") &&
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(win && win.document.documentElement &&
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win.document.documentElement.getAttribute("disablefastfind") == "true"))
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return false;
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return true;
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},
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getSelectionDetails: function(topWindow, aCharLen) {
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// selections of more than 150 characters aren't useful
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const kMaxSelectionLen = 150;
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const charLen = Math.min(aCharLen || kMaxSelectionLen, kMaxSelectionLen);
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let focusedWindow = {};
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let focusedElement = Services.focus.getFocusedElementForWindow(topWindow, true, focusedWindow);
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focusedWindow = focusedWindow.value;
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let selection = focusedWindow.getSelection();
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let selectionStr = selection.toString();
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let collapsed = selection.isCollapsed;
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let url;
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let linkText;
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if (selectionStr) {
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// Have some text, let's figure out if it looks like a URL that isn't
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// actually a link.
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linkText = selectionStr.trim();
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if (/^(?:https?|ftp):/i.test(linkText)) {
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try {
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url = this.makeURI(linkText);
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} catch (ex) {}
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}
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// Check if this could be a valid url, just missing the protocol.
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else if (/^(?:[a-z\d-]+\.)+[a-z]+$/i.test(linkText)) {
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// Now let's see if this is an intentional link selection. Our guess is
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// based on whether the selection begins/ends with whitespace or is
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// preceded/followed by a non-word character.
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// selection.toString() trims trailing whitespace, so we look for
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// that explicitly in the first and last ranges.
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let beginRange = selection.getRangeAt(0);
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let delimitedAtStart = /^\s/.test(beginRange);
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if (!delimitedAtStart) {
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let container = beginRange.startContainer;
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let offset = beginRange.startOffset;
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if (container.nodeType == container.TEXT_NODE && offset > 0)
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delimitedAtStart = /\W/.test(container.textContent[offset - 1]);
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else
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delimitedAtStart = true;
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}
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let delimitedAtEnd = false;
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if (delimitedAtStart) {
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let endRange = selection.getRangeAt(selection.rangeCount - 1);
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delimitedAtEnd = /\s$/.test(endRange);
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if (!delimitedAtEnd) {
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let container = endRange.endContainer;
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let offset = endRange.endOffset;
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if (container.nodeType == container.TEXT_NODE &&
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offset < container.textContent.length)
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delimitedAtEnd = /\W/.test(container.textContent[offset]);
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else
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delimitedAtEnd = true;
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}
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}
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if (delimitedAtStart && delimitedAtEnd) {
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let uriFixup = Cc["@mozilla.org/docshell/urifixup;1"]
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.getService(Ci.nsIURIFixup);
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try {
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url = uriFixup.createFixupURI(linkText, uriFixup.FIXUP_FLAG_NONE);
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} catch (ex) {}
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}
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}
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}
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// try getting a selected text in text input.
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if (!selectionStr && focusedElement instanceof Ci.nsIDOMNSEditableElement) {
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// Don't get the selection for password fields. See bug 565717.
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if (focusedElement instanceof Ci.nsIDOMHTMLTextAreaElement ||
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(focusedElement instanceof Ci.nsIDOMHTMLInputElement &&
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focusedElement.mozIsTextField(true))) {
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selectionStr = focusedElement.editor.selection.toString();
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}
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}
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if (selectionStr) {
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if (selectionStr.length > charLen) {
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// only use the first charLen important chars. see bug 221361
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var pattern = new RegExp("^(?:\\s*.){0," + charLen + "}");
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pattern.test(selectionStr);
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selectionStr = RegExp.lastMatch;
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}
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selectionStr = selectionStr.trim().replace(/\s+/g, " ");
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if (selectionStr.length > charLen) {
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selectionStr = selectionStr.substr(0, charLen);
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}
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}
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if (url && !url.host) {
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url = null;
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}
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return { text: selectionStr, docSelectionIsCollapsed: collapsed,
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linkURL: url ? url.spec : null, linkText: url ? linkText : "" };
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},
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// Iterates through every docshell in the window and calls PermitUnload.
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canCloseWindow(window) {
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let docShell = window.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebNavigation);
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let node = docShell.QueryInterface(Ci.nsIDocShellTreeItem);
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for (let i = 0; i < node.childCount; ++i) {
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let docShell = node.getChildAt(i).QueryInterface(Ci.nsIDocShell);
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let contentViewer = docShell.contentViewer;
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if (contentViewer && !contentViewer.permitUnload()) {
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return false;
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}
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}
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return true;
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},
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};
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