Backed out changeset 50439ec01661 (bug 1485305) Backed out changeset a05e40ef7215 (bug 1485305) Backed out changeset c99b97b4348b (bug 1485305) Backed out changeset 75220b2f6669 (bug 1485305) Backed out changeset e698f2fc1c1a (bug 1485305) Backed out changeset acce14683c13 (bug 1485305) Backed out changeset 323773a395cc (bug 1485305) Backed out changeset 1b74152cabc1 (bug 1485305) Backed out changeset 4b5c9d5929fc (bug 1485305) Backed out changeset 238d92348159 (bug 1485305)
786 lines
25 KiB
JavaScript
786 lines
25 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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/* eslint-env mozilla/frame-script */
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ChromeUtils.import("resource://gre/modules/Services.jsm");
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ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
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ChromeUtils.defineModuleGetter(this, "DeferredTask",
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"resource://gre/modules/DeferredTask.jsm");
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XPCOMUtils.defineLazyGlobalGetters(this, ["NodeFilter"]);
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const NS_XHTML = "http://www.w3.org/1999/xhtml";
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const BUNDLE_URL = "chrome://global/locale/viewSource.properties";
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// These are markers used to delimit the selection during processing. They
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// are removed from the final rendering.
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// We use noncharacter Unicode codepoints to minimize the risk of clashing
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// with anything that might legitimately be present in the document.
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// U+FDD0..FDEF <noncharacters>
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const MARK_SELECTION_START = "\uFDD0";
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const MARK_SELECTION_END = "\uFDEF";
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var global = this;
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/**
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* ViewSourceContent should be loaded in the <xul:browser> of the
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* view source window, and initialized as soon as it has loaded.
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*/
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var ViewSourceContent = {
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/**
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* These are the messages that ViewSourceContent is prepared to listen
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* for. If you need ViewSourceContent to handle more messages, add them
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* here.
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*/
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messages: [
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"ViewSource:LoadSource",
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"ViewSource:LoadSourceWithSelection",
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"ViewSource:GoToLine",
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],
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/**
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* When showing selection source, chrome will construct a page fragment to
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* show, and then instruct content to draw a selection after load. This is
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* set true when there is a pending request to draw selection.
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*/
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needsDrawSelection: false,
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get isViewSource() {
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let uri = content.document.documentURI;
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return uri.startsWith("view-source:");
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},
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get isAboutBlank() {
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let uri = content.document.documentURI;
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return uri == "about:blank";
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},
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/**
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* This should be called as soon as this frame script has loaded.
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*/
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init() {
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this.messages.forEach((msgName) => {
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addMessageListener(msgName, this);
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});
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addEventListener("pagehide", this, true);
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addEventListener("pageshow", this, true);
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addEventListener("click", this);
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addEventListener("unload", this);
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Services.els.addSystemEventListener(global, "contextmenu", this, false);
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},
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/**
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* This should be called when the frame script is being unloaded,
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* and the browser is tearing down.
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*/
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uninit() {
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this.messages.forEach((msgName) => {
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removeMessageListener(msgName, this);
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});
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removeEventListener("pagehide", this, true);
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removeEventListener("pageshow", this, true);
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removeEventListener("click", this);
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removeEventListener("unload", this);
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Services.els.removeSystemEventListener(global, "contextmenu", this, false);
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},
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/**
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* Anything added to the messages array will get handled here, and should
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* get dispatched to a specific function for the message name.
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*/
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receiveMessage(msg) {
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if (!this.isViewSource && !this.isAboutBlank) {
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return;
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}
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let data = msg.data;
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switch (msg.name) {
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case "ViewSource:LoadSource":
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this.viewSource(data.URL, data.outerWindowID, data.lineNumber,
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data.shouldWrap);
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break;
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case "ViewSource:LoadSourceWithSelection":
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this.viewSourceWithSelection(data.URL, data.drawSelection, data.baseURI);
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break;
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case "ViewSource:GoToLine":
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this.goToLine(data.lineNumber);
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break;
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}
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},
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/**
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* Any events should get handled here, and should get dispatched to
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* a specific function for the event type.
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*/
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handleEvent(event) {
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if (!this.isViewSource) {
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return;
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}
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switch (event.type) {
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case "pagehide":
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this.onPageHide(event);
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break;
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case "pageshow":
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this.onPageShow(event);
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break;
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case "click":
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this.onClick(event);
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break;
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case "unload":
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this.uninit();
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break;
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case "contextmenu":
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this.onContextMenu(event);
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break;
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}
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},
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/**
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* A getter for the view source string bundle.
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*/
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get bundle() {
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delete this.bundle;
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this.bundle = Services.strings.createBundle(BUNDLE_URL);
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return this.bundle;
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},
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/**
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* A shortcut to the nsISelectionController for the content.
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*/
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get selectionController() {
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return docShell.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsISelectionDisplay)
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.QueryInterface(Ci.nsISelectionController);
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},
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/**
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* A shortcut to the nsIWebBrowserFind for the content.
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*/
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get webBrowserFind() {
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return docShell.QueryInterface(Ci.nsIInterfaceRequestor)
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.getInterface(Ci.nsIWebBrowserFind);
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},
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/**
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* Called when the parent sends a message to view some source code.
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*
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* @param URL (required)
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* The URL string of the source to be shown.
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* @param outerWindowID (optional)
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* The outerWindowID of the content window that has hosted
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* the document, in case we want to retrieve it from the network
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* cache.
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* @param lineNumber (optional)
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* The line number to focus as soon as the source has finished
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* loading.
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*/
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viewSource(URL, outerWindowID, lineNumber) {
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let pageDescriptor, forcedCharSet;
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if (outerWindowID) {
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let contentWindow = Services.wm.getOuterWindowWithId(outerWindowID);
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let otherDocShell = contentWindow.docShell;
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try {
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pageDescriptor = otherDocShell.QueryInterface(Ci.nsIWebPageDescriptor)
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.currentDescriptor;
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} catch (e) {
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// We couldn't get the page descriptor, so we'll probably end up re-retrieving
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// this document off of the network.
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}
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let utils = contentWindow.windowUtils;
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let doc = contentWindow.document;
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forcedCharSet = utils.docCharsetIsForced ? doc.characterSet
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: null;
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}
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this.loadSource(URL, pageDescriptor, lineNumber, forcedCharSet);
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},
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/**
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* Common utility function used by both the current and deprecated APIs
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* for loading source.
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*
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* @param URL (required)
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* The URL string of the source to be shown.
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* @param pageDescriptor (optional)
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* The currentDescriptor off of an nsIWebPageDescriptor, in the
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* event that the caller wants to try to load the source out of
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* the network cache.
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* @param lineNumber (optional)
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* The line number to focus as soon as the source has finished
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* loading.
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* @param forcedCharSet (optional)
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* The document character set to use instead of the default one.
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*/
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loadSource(URL, pageDescriptor, lineNumber, forcedCharSet) {
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const viewSrcURL = "view-source:" + URL;
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if (forcedCharSet) {
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try {
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docShell.charset = forcedCharSet;
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} catch (e) { /* invalid charset */ }
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}
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if (lineNumber && lineNumber > 0) {
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let doneLoading = (event) => {
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// Ignore possible initial load of about:blank
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if (this.isAboutBlank ||
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!content.document.body) {
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return;
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}
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this.goToLine(lineNumber);
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removeEventListener("pageshow", doneLoading);
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};
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addEventListener("pageshow", doneLoading);
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}
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if (!pageDescriptor) {
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this.loadSourceFromURL(viewSrcURL);
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return;
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}
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try {
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let pageLoader = docShell.QueryInterface(Ci.nsIWebPageDescriptor);
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pageLoader.loadPage(pageDescriptor,
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Ci.nsIWebPageDescriptor.DISPLAY_AS_SOURCE);
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} catch (e) {
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// We were not able to load the source from the network cache.
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this.loadSourceFromURL(viewSrcURL);
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return;
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}
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let shEntrySource = pageDescriptor.QueryInterface(Ci.nsISHEntry);
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let shEntry = Cc["@mozilla.org/browser/session-history-entry;1"]
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.createInstance(Ci.nsISHEntry);
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shEntry.URI = Services.io.newURI(viewSrcURL);
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shEntry.title = viewSrcURL;
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let systemPrincipal = Services.scriptSecurityManager.getSystemPrincipal();
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shEntry.triggeringPrincipal = systemPrincipal;
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shEntry.setLoadTypeAsHistory();
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shEntry.cacheKey = shEntrySource.cacheKey;
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docShell.QueryInterface(Ci.nsIWebNavigation)
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.sessionHistory
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.legacySHistory
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.addEntry(shEntry, true);
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},
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/**
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* Load some URL in the browser.
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*
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* @param URL
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* The URL string to load.
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*/
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loadSourceFromURL(URL) {
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let loadFlags = Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
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let webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
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webNav.loadURI(URL, loadFlags, null, null, null);
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},
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/**
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* This handler is for click events from:
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* * error page content, which can show up if the user attempts to view the
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* source of an attack page.
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* * in-page context menu actions
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*/
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onClick(event) {
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let target = event.originalTarget;
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// Check for content menu actions
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if (target.id) {
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this.contextMenuItems.forEach(itemSpec => {
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if (itemSpec.id !== target.id) {
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return;
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}
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itemSpec.handler.call(this, event);
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event.stopPropagation();
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});
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}
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// Don't trust synthetic events
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if (!event.isTrusted || event.target.localName != "button")
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return;
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let errorDoc = target.ownerDocument;
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if (/^about:blocked/.test(errorDoc.documentURI)) {
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// The event came from a button on a malware/phishing block page
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if (target == errorDoc.getElementById("goBackButton")) {
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// Instead of loading some safe page, just close the window
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sendAsyncMessage("ViewSource:Close");
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}
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}
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},
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/**
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* Handler for the pageshow event.
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*
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* @param event
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* The pageshow event being handled.
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*/
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onPageShow(event) {
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content.focus();
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// If we need to draw the selection, wait until an actual view source page
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// has loaded, instead of about:blank.
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if (this.needsDrawSelection &&
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content.document.documentURI.startsWith("view-source:")) {
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this.needsDrawSelection = false;
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this.drawSelection();
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}
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if (content.document.body) {
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this.injectContextMenu();
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}
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sendAsyncMessage("ViewSource:SourceLoaded");
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},
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/**
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* Handler for the pagehide event.
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*
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* @param event
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* The pagehide event being handled.
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*/
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onPageHide(event) {
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sendAsyncMessage("ViewSource:SourceUnloaded");
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},
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onContextMenu(event) {
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let node = event.target;
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let result = {
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isEmail: false,
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isLink: false,
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href: "",
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// We have to pass these in the event that we're running in
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// a remote browser, so that ViewSourceChrome knows where to
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// open the context menu.
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screenX: event.screenX,
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screenY: event.screenY,
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};
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if (node && node.localName == "a") {
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result.isLink = node.href.startsWith("view-source:");
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result.isEmail = node.href.startsWith("mailto:");
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result.href = node.href.substring(node.href.indexOf(":") + 1);
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}
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sendSyncMessage("ViewSource:ContextMenuOpening", result);
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},
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/**
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* Attempts to go to a particular line in the source code being
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* shown. If it succeeds in finding the line, it will fire a
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* "ViewSource:GoToLine:Success" message, passing up an object
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* with the lineNumber we just went to. If it cannot find the line,
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* it will fire a "ViewSource:GoToLine:Failed" message.
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*
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* @param lineNumber
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* The line number to attempt to go to.
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*/
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goToLine(lineNumber) {
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let body = content.document.body;
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// The source document is made up of a number of pre elements with
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// id attributes in the format <pre id="line123">, meaning that
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// the first line in the pre element is number 123.
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// Do binary search to find the pre element containing the line.
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// However, in the plain text case, we have only one pre without an
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// attribute, so assume it begins on line 1.
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let pre;
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for (let lbound = 0, ubound = body.childNodes.length; ; ) {
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let middle = (lbound + ubound) >> 1;
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pre = body.childNodes[middle];
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let firstLine = pre.id ? parseInt(pre.id.substring(4)) : 1;
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if (lbound == ubound - 1) {
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break;
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}
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if (lineNumber >= firstLine) {
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lbound = middle;
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} else {
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ubound = middle;
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}
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}
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let result = {};
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let found = this.findLocation(pre, lineNumber, null, -1, false, result);
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if (!found) {
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sendAsyncMessage("ViewSource:GoToLine:Failed");
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return;
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}
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let selection = content.getSelection();
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selection.removeAllRanges();
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// In our case, the range's startOffset is after "\n" on the previous line.
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// Tune the selection at the beginning of the next line and do some tweaking
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// to position the focusNode and the caret at the beginning of the line.
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selection.interlinePosition = true;
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selection.addRange(result.range);
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if (!selection.isCollapsed) {
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selection.collapseToEnd();
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let offset = result.range.startOffset;
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let node = result.range.startContainer;
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if (offset < node.data.length) {
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// The same text node spans across the "\n", just focus where we were.
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selection.extend(node, offset);
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} else {
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// There is another tag just after the "\n", hook there. We need
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// to focus a safe point because there are edgy cases such as
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// <span>...\n</span><span>...</span> vs.
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// <span>...\n<span>...</span></span><span>...</span>
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node = node.nextSibling ? node.nextSibling : node.parentNode.nextSibling;
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selection.extend(node, 0);
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}
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}
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let selCon = this.selectionController;
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selCon.setDisplaySelection(Ci.nsISelectionController.SELECTION_ON);
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selCon.setCaretVisibilityDuringSelection(true);
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// Scroll the beginning of the line into view.
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selCon.scrollSelectionIntoView(
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Ci.nsISelectionController.SELECTION_NORMAL,
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Ci.nsISelectionController.SELECTION_FOCUS_REGION,
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true);
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sendAsyncMessage("ViewSource:GoToLine:Success", { lineNumber });
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},
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|
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/**
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* Some old code from the original view source implementation. Original
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* documentation follows:
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*
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* "Loops through the text lines in the pre element. The arguments are either
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* (pre, line) or (node, offset, interlinePosition). result is an out
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* argument. If (pre, line) are specified (and node == null), result.range is
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* a range spanning the specified line. If the (node, offset,
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* interlinePosition) are specified, result.line and result.col are the line
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* and column number of the specified offset in the specified node relative to
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* the whole file."
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*/
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findLocation(pre, lineNumber, node, offset, interlinePosition, result) {
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if (node && !pre) {
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// Look upwards to find the current pre element.
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for (pre = node;
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pre.nodeName != "PRE";
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pre = pre.parentNode);
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}
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|
// The source document is made up of a number of pre elements with
|
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// id attributes in the format <pre id="line123">, meaning that
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// the first line in the pre element is number 123.
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|
// However, in the plain text case, there is only one <pre> without an id,
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// so assume line 1.
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let curLine = pre.id ? parseInt(pre.id.substring(4)) : 1;
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// Walk through each of the text nodes and count newlines.
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let treewalker = content.document
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.createTreeWalker(pre, NodeFilter.SHOW_TEXT, null);
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// The column number of the first character in the current text node.
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|
let firstCol = 1;
|
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let found = false;
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for (let textNode = treewalker.firstChild();
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textNode && !found;
|
|
textNode = treewalker.nextNode()) {
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|
|
// \r is not a valid character in the DOM, so we only check for \n.
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|
let lineArray = textNode.data.split(/\n/);
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let lastLineInNode = curLine + lineArray.length - 1;
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// Check if we can skip the text node without further inspection.
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if (node ? (textNode != node) : (lastLineInNode < lineNumber)) {
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if (lineArray.length > 1) {
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firstCol = 1;
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}
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firstCol += lineArray[lineArray.length - 1].length;
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curLine = lastLineInNode;
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continue;
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}
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|
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// curPos is the offset within the current text node of the first
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// character in the current line.
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|
for (var i = 0, curPos = 0;
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i < lineArray.length;
|
|
curPos += lineArray[i++].length + 1) {
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if (i > 0) {
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curLine++;
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}
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if (node) {
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|
if (offset >= curPos && offset <= curPos + lineArray[i].length) {
|
|
// If we are right after the \n of a line and interlinePosition is
|
|
// false, the caret looks as if it were at the end of the previous
|
|
// line, so we display that line and column instead.
|
|
|
|
if (i > 0 && offset == curPos && !interlinePosition) {
|
|
result.line = curLine - 1;
|
|
var prevPos = curPos - lineArray[i - 1].length;
|
|
result.col = (i == 1 ? firstCol : 1) + offset - prevPos;
|
|
} else {
|
|
result.line = curLine;
|
|
result.col = (i == 0 ? firstCol : 1) + offset - curPos;
|
|
}
|
|
found = true;
|
|
|
|
break;
|
|
}
|
|
|
|
} else if (curLine == lineNumber && !("range" in result)) {
|
|
result.range = content.document.createRange();
|
|
result.range.setStart(textNode, curPos);
|
|
|
|
// This will always be overridden later, except when we look for
|
|
// the very last line in the file (this is the only line that does
|
|
// not end with \n).
|
|
result.range.setEndAfter(pre.lastChild);
|
|
|
|
} else if (curLine == lineNumber + 1) {
|
|
result.range.setEnd(textNode, curPos - 1);
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return found || ("range" in result);
|
|
},
|
|
|
|
/**
|
|
* Toggles the "wrap" class on the document body, which sets whether
|
|
* or not long lines are wrapped. Notifies parent to update the pref.
|
|
*/
|
|
toggleWrapping() {
|
|
let body = content.document.body;
|
|
let state = body.classList.toggle("wrap");
|
|
sendAsyncMessage("ViewSource:StoreWrapping", { state });
|
|
},
|
|
|
|
/**
|
|
* Toggles the "highlight" class on the document body, which sets whether
|
|
* or not syntax highlighting is displayed. Notifies parent to update the
|
|
* pref.
|
|
*/
|
|
toggleSyntaxHighlighting() {
|
|
let body = content.document.body;
|
|
let state = body.classList.toggle("highlight");
|
|
sendAsyncMessage("ViewSource:StoreSyntaxHighlighting", { state });
|
|
},
|
|
|
|
/**
|
|
* Loads a view source selection showing the given view-source url and
|
|
* highlight the selection.
|
|
*
|
|
* @param uri view-source uri to show
|
|
* @param drawSelection true to highlight the selection
|
|
* @param baseURI base URI of the original document
|
|
*/
|
|
viewSourceWithSelection(uri, drawSelection, baseURI) {
|
|
this.needsDrawSelection = drawSelection;
|
|
|
|
// all our content is held by the data:URI and URIs are internally stored as utf-8 (see nsIURI.idl)
|
|
let loadFlags = Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
|
|
let referrerPolicy = Ci.nsIHttpChannel.REFERRER_POLICY_UNSET;
|
|
let webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
|
|
webNav.loadURIWithOptions(uri, loadFlags,
|
|
null, referrerPolicy, // referrer
|
|
null, null, // postData, headers
|
|
Services.io.newURI(baseURI));
|
|
},
|
|
|
|
/**
|
|
* Using special markers left in the serialized source, this helper makes the
|
|
* underlying markup of the selected fragment to automatically appear as
|
|
* selected on the inflated view-source DOM.
|
|
*/
|
|
drawSelection() {
|
|
content.document.title =
|
|
this.bundle.GetStringFromName("viewSelectionSourceTitle");
|
|
|
|
// find the special selection markers that we added earlier, and
|
|
// draw the selection between the two...
|
|
var findService = null;
|
|
try {
|
|
// get the find service which stores the global find state
|
|
findService = Cc["@mozilla.org/find/find_service;1"]
|
|
.getService(Ci.nsIFindService);
|
|
} catch (e) { }
|
|
if (!findService)
|
|
return;
|
|
|
|
// cache the current global find state
|
|
var matchCase = findService.matchCase;
|
|
var entireWord = findService.entireWord;
|
|
var wrapFind = findService.wrapFind;
|
|
var findBackwards = findService.findBackwards;
|
|
var searchString = findService.searchString;
|
|
var replaceString = findService.replaceString;
|
|
|
|
// setup our find instance
|
|
var findInst = this.webBrowserFind;
|
|
findInst.matchCase = true;
|
|
findInst.entireWord = false;
|
|
findInst.wrapFind = true;
|
|
findInst.findBackwards = false;
|
|
|
|
// ...lookup the start mark
|
|
findInst.searchString = MARK_SELECTION_START;
|
|
var startLength = MARK_SELECTION_START.length;
|
|
findInst.findNext();
|
|
|
|
var selection = content.getSelection();
|
|
if (!selection.rangeCount)
|
|
return;
|
|
|
|
var range = selection.getRangeAt(0);
|
|
|
|
var startContainer = range.startContainer;
|
|
var startOffset = range.startOffset;
|
|
|
|
// ...lookup the end mark
|
|
findInst.searchString = MARK_SELECTION_END;
|
|
var endLength = MARK_SELECTION_END.length;
|
|
findInst.findNext();
|
|
|
|
var endContainer = selection.anchorNode;
|
|
var endOffset = selection.anchorOffset;
|
|
|
|
// reset the selection that find has left
|
|
selection.removeAllRanges();
|
|
|
|
// delete the special markers now...
|
|
endContainer.deleteData(endOffset, endLength);
|
|
startContainer.deleteData(startOffset, startLength);
|
|
if (startContainer == endContainer)
|
|
endOffset -= startLength; // has shrunk if on same text node...
|
|
range.setEnd(endContainer, endOffset);
|
|
|
|
// show the selection and scroll it into view
|
|
selection.addRange(range);
|
|
// the default behavior of the selection is to scroll at the end of
|
|
// the selection, whereas in this situation, it is more user-friendly
|
|
// to scroll at the beginning. So we override the default behavior here
|
|
try {
|
|
this.selectionController.scrollSelectionIntoView(
|
|
Ci.nsISelectionController.SELECTION_NORMAL,
|
|
Ci.nsISelectionController.SELECTION_ANCHOR_REGION,
|
|
true);
|
|
} catch (e) { }
|
|
|
|
// restore the current find state
|
|
findService.matchCase = matchCase;
|
|
findService.entireWord = entireWord;
|
|
findService.wrapFind = wrapFind;
|
|
findService.findBackwards = findBackwards;
|
|
findService.searchString = searchString;
|
|
findService.replaceString = replaceString;
|
|
|
|
findInst.matchCase = matchCase;
|
|
findInst.entireWord = entireWord;
|
|
findInst.wrapFind = wrapFind;
|
|
findInst.findBackwards = findBackwards;
|
|
findInst.searchString = searchString;
|
|
},
|
|
|
|
/**
|
|
* In-page context menu items that are injected after page load.
|
|
*/
|
|
contextMenuItems: [
|
|
{
|
|
id: "goToLine",
|
|
accesskey: true,
|
|
handler() {
|
|
sendAsyncMessage("ViewSource:PromptAndGoToLine");
|
|
},
|
|
},
|
|
{
|
|
id: "wrapLongLines",
|
|
get checked() {
|
|
return Services.prefs.getBoolPref("view_source.wrap_long_lines");
|
|
},
|
|
handler() {
|
|
this.toggleWrapping();
|
|
},
|
|
},
|
|
{
|
|
id: "highlightSyntax",
|
|
get checked() {
|
|
return Services.prefs.getBoolPref("view_source.syntax_highlight");
|
|
},
|
|
handler() {
|
|
this.toggleSyntaxHighlighting();
|
|
},
|
|
},
|
|
],
|
|
|
|
/**
|
|
* Add context menu items for view source specific actions.
|
|
*/
|
|
injectContextMenu() {
|
|
let doc = content.document;
|
|
|
|
let menu = doc.createElementNS(NS_XHTML, "menu");
|
|
menu.setAttribute("type", "context");
|
|
menu.setAttribute("id", "actions");
|
|
doc.body.appendChild(menu);
|
|
doc.body.setAttribute("contextmenu", "actions");
|
|
|
|
this.contextMenuItems.forEach(itemSpec => {
|
|
let item = doc.createElementNS(NS_XHTML, "menuitem");
|
|
item.setAttribute("id", itemSpec.id);
|
|
let labelName = `context_${itemSpec.id}_label`;
|
|
let label = this.bundle.GetStringFromName(labelName);
|
|
item.setAttribute("label", label);
|
|
if ("checked" in itemSpec) {
|
|
item.setAttribute("type", "checkbox");
|
|
}
|
|
if (itemSpec.accesskey) {
|
|
let accesskeyName = `context_${itemSpec.id}_accesskey`;
|
|
item.setAttribute("accesskey",
|
|
this.bundle.GetStringFromName(accesskeyName));
|
|
}
|
|
menu.appendChild(item);
|
|
});
|
|
|
|
this.updateContextMenu();
|
|
},
|
|
|
|
/**
|
|
* Update state of checkbox-style context menu items.
|
|
*/
|
|
updateContextMenu() {
|
|
let doc = content.document;
|
|
this.contextMenuItems.forEach(itemSpec => {
|
|
if (!("checked" in itemSpec)) {
|
|
return;
|
|
}
|
|
let item = doc.getElementById(itemSpec.id);
|
|
if (itemSpec.checked) {
|
|
item.setAttribute("checked", true);
|
|
} else {
|
|
item.removeAttribute("checked");
|
|
}
|
|
});
|
|
},
|
|
};
|
|
ViewSourceContent.init();
|