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/**
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* import-globals-from ../../../../toolkit/content/contentAreaUtils.js */
/* import-globals-from utilityOverlay.js */
/* globals getMessagePaneBrowser */ // From aboutMessage.js
var { XPCOMUtils } = ChromeUtils.importESModule(
"resource://gre/modules/XPCOMUtils.sys.mjs"
);
XPCOMUtils.defineLazyModuleGetters(this, {
PhishingDetector: "resource:///modules/PhishingDetector.jsm",
});
XPCOMUtils.defineLazyPreferenceGetter(
this,
"alternativeAddonSearchUrl",
"extensions.alternativeAddonSearch.url"
);
XPCOMUtils.defineLazyPreferenceGetter(
this,
"canonicalAddonServerUrl",
"extensions.canonicalAddonServer.url"
);
/**
* Extract the href from the link click event.
* We look for HTMLAnchorElement, HTMLAreaElement, HTMLLinkElement,
* HTMLInputElement.form.action, and nested anchor tags.
* If the clicked element was a HTMLInputElement or HTMLButtonElement
* we return the form action.
*
* @returns [href, linkText] the url and the text for the link being clicked.
*/
function hRefForClickEvent(aEvent, aDontCheckInputElement) {
let target =
aEvent.type == "command"
? document.commandDispatcher.focusedElement
: aEvent.target;
if (
HTMLImageElement.isInstance(target) &&
target.hasAttribute("overflowing")
) {
// Click on zoomed image.
return [null, null];
}
let href = null;
let linkText = null;
if (
HTMLAnchorElement.isInstance(target) ||
HTMLAreaElement.isInstance(target) ||
HTMLLinkElement.isInstance(target)
) {
if (target.hasAttribute("href")) {
href = target.href;
linkText = gatherTextUnder(target);
}
} else if (
!aDontCheckInputElement &&
(HTMLInputElement.isInstance(target) ||
HTMLButtonElement.isInstance(target))
) {
if (target.form && target.form.action) {
href = target.form.action;
}
} else {
// We may be nested inside of a link node.
let linkNode = aEvent.target;
while (linkNode && !HTMLAnchorElement.isInstance(linkNode)) {
linkNode = linkNode.parentNode;
}
if (linkNode) {
href = linkNode.href;
linkText = gatherTextUnder(linkNode);
}
}
return [href, linkText];
}
/**
* Check whether the click target's or its ancestor's href
* points to an anchor on the page.
*
* @param HTMLElement aTargetNode - the element node.
* @returns - true if link pointing to anchor.
*/
function isLinkToAnchorOnPage(aTargetNode) {
let url = aTargetNode.ownerDocument.URL;
if (!url.startsWith("http")) {
return false;
}
let linkNode = aTargetNode;
while (linkNode && !HTMLAnchorElement.isInstance(linkNode)) {
linkNode = linkNode.parentNode;
}
// It's not a link with an anchor.
if (!linkNode || !linkNode.href || !linkNode.hash) {
return false;
}
// The link's href must match the document URL.
if (makeURI(linkNode.href).specIgnoringRef != makeURI(url).specIgnoringRef) {
return false;
}
return true;
}
// Called whenever the user clicks in the content area,
// should always return true for click to go through.
function contentAreaClick(aEvent) {
let target = aEvent.target;
if (target.localName == "browser") {
// This is a remote browser. Nothing useful can happen in this process.
return true;
}
// If we've loaded a web page url, and the element's or its ancestor's href
// points to an anchor on the page, let the click go through.
// Otherwise fall through and open externally.
if (isLinkToAnchorOnPage(target)) {
return true;
}
let [href, linkText] = hRefForClickEvent(aEvent);
if (!href && !aEvent.button) {
// Is this an image that we might want to scale?
if (HTMLImageElement.isInstance(target)) {
// Make sure it loaded successfully. No action if not or a broken link.
var req = target.getRequest(Ci.nsIImageLoadingContent.CURRENT_REQUEST);
if (!req || req.imageStatus & Ci.imgIRequest.STATUS_ERROR) {
return false;
}
// Is it an image?
if (target.localName == "img" && target.hasAttribute("overflowing")) {
if (target.hasAttribute("shrinktofit")) {
// Currently shrunk to fit, so unshrink it.
target.removeAttribute("shrinktofit");
} else {
// User wants to shrink now.
target.setAttribute("shrinktofit", true);
}
return false;
}
}
return true;
}
if (!href || aEvent.button == 2) {
return true;
}
// We want all about, http and https links in the message pane to be loaded
// externally in a browser, therefore we need to detect that here and redirect
// as necessary.
let uri = makeURI(href);
if (
Cc["@mozilla.org/uriloader/external-protocol-service;1"]
.getService(Ci.nsIExternalProtocolService)
.isExposedProtocol(uri.scheme) &&
!uri.schemeIs("http") &&
!uri.schemeIs("https")
) {
return true;
}
// Add-on names in the Add-On Manager are links, but we don't want to do
// anything with them.
if (uri.schemeIs("addons")) {
return true;
}
// Now we're here, we know this should be loaded in an external browser, so
// prevent the default action so we don't try and load it here.
aEvent.preventDefault();
// Let the phishing detector check the link.
let urlPhishCheckResult = PhishingDetector.warnOnSuspiciousLinkClick(
window,
href,
linkText
);
if (urlPhishCheckResult === 1) {
return false; // Block request
}
if (urlPhishCheckResult === 0) {
// Use linkText instead.
openLinkExternally(linkText);
return true;
}
openLinkExternally(href);
return true;
}
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