1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/modules/BrowserUtils.jsm Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,115 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +"use strict";
1.9 +
1.10 +this.EXPORTED_SYMBOLS = [ "BrowserUtils" ];
1.11 +
1.12 +const {interfaces: Ci, utils: Cu, classes: Cc} = Components;
1.13 +
1.14 +Cu.import("resource://gre/modules/Services.jsm");
1.15 +
1.16 +this.BrowserUtils = {
1.17 +
1.18 + /**
1.19 + * urlSecurityCheck: JavaScript wrapper for checkLoadURIWithPrincipal
1.20 + * and checkLoadURIStrWithPrincipal.
1.21 + * If |aPrincipal| is not allowed to link to |aURL|, this function throws with
1.22 + * an error message.
1.23 + *
1.24 + * @param aURL
1.25 + * The URL a page has linked to. This could be passed either as a string
1.26 + * or as a nsIURI object.
1.27 + * @param aPrincipal
1.28 + * The principal of the document from which aURL came.
1.29 + * @param aFlags
1.30 + * Flags to be passed to checkLoadURIStr. If undefined,
1.31 + * nsIScriptSecurityManager.STANDARD will be passed.
1.32 + */
1.33 + urlSecurityCheck: function(aURL, aPrincipal, aFlags) {
1.34 + var secMan = Services.scriptSecurityManager;
1.35 + if (aFlags === undefined) {
1.36 + aFlags = secMan.STANDARD;
1.37 + }
1.38 +
1.39 + try {
1.40 + if (aURL instanceof Ci.nsIURI)
1.41 + secMan.checkLoadURIWithPrincipal(aPrincipal, aURL, aFlags);
1.42 + else
1.43 + secMan.checkLoadURIStrWithPrincipal(aPrincipal, aURL, aFlags);
1.44 + } catch (e) {
1.45 + let principalStr = "";
1.46 + try {
1.47 + principalStr = " from " + aPrincipal.URI.spec;
1.48 + }
1.49 + catch(e2) { }
1.50 +
1.51 + throw "Load of " + aURL + principalStr + " denied.";
1.52 + }
1.53 + },
1.54 +
1.55 + /**
1.56 + * Constructs a new URI, using nsIIOService.
1.57 + * @param aURL The URI spec.
1.58 + * @param aOriginCharset The charset of the URI.
1.59 + * @param aBaseURI Base URI to resolve aURL, or null.
1.60 + * @return an nsIURI object based on aURL.
1.61 + */
1.62 + makeURI: function(aURL, aOriginCharset, aBaseURI) {
1.63 + return Services.io.newURI(aURL, aOriginCharset, aBaseURI);
1.64 + },
1.65 +
1.66 + makeFileURI: function(aFile) {
1.67 + return Services.io.newFileURI(aFile);
1.68 + },
1.69 +
1.70 + /**
1.71 + * Return the current focus element and window. If the current focus
1.72 + * is in a content process, then this function returns CPOWs
1.73 + * (cross-process object wrappers) that refer to the focused
1.74 + * items. Note that calling this function synchronously contacts the
1.75 + * content process, which may block for a long time.
1.76 + *
1.77 + * @param document The document in question.
1.78 + * @return [focusedElement, focusedWindow]
1.79 + */
1.80 + getFocusSync: function(document) {
1.81 + let elt = document.commandDispatcher.focusedElement;
1.82 + var window = document.commandDispatcher.focusedWindow;
1.83 +
1.84 + const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
1.85 + if (elt instanceof window.XULElement &&
1.86 + elt.localName == "browser" &&
1.87 + elt.namespaceURI == XUL_NS &&
1.88 + elt.getAttribute("remote")) {
1.89 + [elt, window] = elt.syncHandler.getFocusedElementAndWindow();
1.90 + }
1.91 +
1.92 + return [elt, window];
1.93 + },
1.94 +
1.95 + /**
1.96 + * For a given DOM element, returns its position in "screen"
1.97 + * coordinates. In a content process, the coordinates returned will
1.98 + * be relative to the left/top of the tab. In the chrome process,
1.99 + * the coordinates are relative to the user's screen.
1.100 + */
1.101 + getElementBoundingScreenRect: function(aElement) {
1.102 + let rect = aElement.getBoundingClientRect();
1.103 + let window = aElement.ownerDocument.defaultView;
1.104 +
1.105 + // We need to compensate for any iframes that might shift things
1.106 + // over. We also need to compensate for zooming.
1.107 + let fullZoom = window.getInterface(Ci.nsIDOMWindowUtils).fullZoom;
1.108 + rect = {
1.109 + left: (rect.left + window.mozInnerScreenX) * fullZoom,
1.110 + top: (rect.top + window.mozInnerScreenY) * fullZoom,
1.111 + width: rect.width * fullZoom,
1.112 + height: rect.height * fullZoom
1.113 + };
1.114 +
1.115 + return rect;
1.116 + },
1.117 +
1.118 +};
