Issue 2879 - Make "view source" command work again

lib/aardvark.js

 /*
  * This Source Code is subject to the terms of the Mozilla Public License
  * version 2.0 (the "License"). You can obtain a copy of the License at
  * http://mozilla.org/MPL/2.0/.
  */
 
 let {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
 
 let {Prefs} = require("prefs");
 
 let messageManager = Cc["@mozilla.org/parentprocessmessagemanager;1"]
                        .getService(Ci.nsIMessageListenerManager)
                        .QueryInterface(Ci.nsIMessageBroadcaster);
 
 // To be replaced when selection starts
 function E(id) {return null;}
 
+messageManager.addMessageListener("ElemHideHelper:Response",
+                                  messageResponse);
 messageManager.addMessageListener("ElemHideHelper:SelectionStarted",
                                   selectionStarted);
 messageManager.addMessageListener("ElemHideHelper:SelectionSucceeded",
                                   selectionSucceeded);
 messageManager.addMessageListener("ElemHideHelper:SelectionStopped",
                                   selectionStopped);
 onShutdown.add(() =>
 {
+  messageManager.removeMessageListener("ElemHideHelper:Response",
+                                       messageResponse);
   messageManager.removeMessageListener("ElemHideHelper:SelectionStarted",
                                        selectionStarted);
   messageManager.removeMessageListener("ElemHideHelper:SelectionSucceeded",
                                        selectionSucceeded);
   messageManager.removeMessageListener("ElemHideHelper:SelectionStopped",
                                        selectionStopped);
 
   selectionStopped();
 });
 
+let maxMessageId = 0;
+let messageCallbacks = new Map();
+
+function sendMessageWithResponse(messageName, data, callback)
+{
+  if (!data)
+    data = {};
+  data.messageId = ++maxMessageId;
+  messageCallbacks.set(data.messageId, callback);
+  messageManager.broadcastAsyncMessage(messageName, data);
+}
+
+function messageResponse(message)
+{
+  let callback = messageCallbacks.get(message.data.messageId);
+  if (callback)
+  {
+    messageCallbacks.delete(message.data.messageId);
+    callback(message.data);
+  }
+}
+
 function selectionStarted(message)
 {
   Aardvark.selectionStarted();
 }
 
 function selectionSucceeded(message)
 {
   Aardvark.selectionSucceeded(message.data);
 }
 
@@ skipping 220 matching lines @@
     "wider",
     "narrower",
     "lock",
     "quit",
     "blinkElement",
     "viewSource",
     "viewSourceWindow",
     "showMenu"
   ],
 
-  viewSource: function(elem)
+  viewSource: function()
   {
-    if (!elem)
-      return false;
-
-    var sourceBox = E("ehh-viewsource");
+    let sourceBox = E("ehh-viewsource");
     if (sourceBox.state == "open")
     {
       sourceBox.hidePopup();
       return true;
     }
-    sourceBox.hidePopup();
 
-    while (sourceBox.firstElementChild)
-      sourceBox.removeChild(sourceBox.firstElementChild);
-    this.getOuterHtmlFormatted(elem, sourceBox);
+    sendMessageWithResponse("ElemHideHelper:SerializeSelected", null, data =>
+    {
+      sourceBox.hidePopup();
 
-    let anchor = this.window.document.documentElement;
-    let x = this.mouseX;
-    let y = this.mouseY;
-    this.viewSourceTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
-    this.viewSourceTimer.initWithCallback(function()
-    {
-      sourceBox.showPopup(anchor, x, y, "tooltip", "topleft", "topleft");
-      Aardvark.viewSourceTimer = null;
-    }, 500, Ci.nsITimer.TYPE_ONE_SHOT);
+      while (sourceBox.firstElementChild)
+        sourceBox.removeChild(sourceBox.firstElementChild);
+      this.getOuterHtmlFormatted(data.serialized, sourceBox);
+
+      let anchor = this.window.document.documentElement;
+      let x = this.mouseX;
+      let y = this.mouseY;
+      this.viewSourceTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+      this.viewSourceTimer.initWithCallback(function()
+      {
+        sourceBox.showPopup(anchor, x, y, "tooltip", "topleft", "topleft");
+        Aardvark.viewSourceTimer = null;
+      }, 500, Ci.nsITimer.TYPE_ONE_SHOT);
+    });
     return true;
   },
 
   viewSourceWindow: function(elem)
   {
     if (!elem)
       return false;
 
     if (Services.vc.compare(Services.appinfo.platformVersion, "43.0") >= 0)
     {
@@ skipping 19 matching lines @@
         "chrome://global/content/viewPartialSource.xul",
         "_blank", "scrollbars,resizable,chrome,dialog=no",
         null, null, selection, "selection"
       );
     }
     return true;
   },
 
   getOuterHtmlFormatted: function(node, container)
   {
-    var type = null;
-    switch (node.nodeType)
+    let type = node.type;
+    if (type == "element")
     {
-      case node.ELEMENT_NODE:
-        var box = this.window.document.createElement("vbox");
-        box.className = "elementBox";
+      let box = this.window.document.createElement("vbox");
+      box.className = "elementBox";
 
-        var startTag = this.window.document.createElement("hbox");
-        startTag.className = "elementStartTag";
-        if (!node.firstChild)
-          startTag.className += " elementEndTag";
+      let startTag = this.window.document.createElement("hbox");
+      startTag.className = "elementStartTag";
+      if (!node.children.length)
+        startTag.className += " elementEndTag";
 
-        this.appendDescription(startTag, "<", null);
-        this.appendDescription(startTag, node.tagName, "tagName");
+      this.appendDescription(startTag, "<", null);
+      this.appendDescription(startTag, node.tagName, "tagName");
 
-        for (var i = 0; i < node.attributes.length; i++)
+      for (let {name, value} of node.attributes)
+      {
+        this.appendDescription(startTag, name, "attrName");
+        if (value != "")
         {
-          var attr = node.attributes[i];
-          this.appendDescription(startTag, attr.name, "attrName");
-          if (attr.value != "")
-          {
-            this.appendDescription(startTag, "=", null);
-            this.appendDescription(startTag, '"' + attr.value.replace(/"/, "&quot;") + '"', "attrValue");
-          }
+          this.appendDescription(startTag, "=", null);
+          this.appendDescription(startTag, `"${value.replace(/"/, "&quot;")}"`,
+                                 "attrValue");
         }
+      }
 
-        this.appendDescription(startTag, node.firstChild ? ">" : " />", null);
-        box.appendChild(startTag);
+      this.appendDescription(startTag, node.children.length ? ">" : " />", null);
+      box.appendChild(startTag);
 
-        if (node.firstChild)
-        {
-          for (var child = node.firstChild; child; child = child.nextSibling)
-            this.getOuterHtmlFormatted(child, box);
+      if (node.children.length)
+      {
+        for (let child of node.children)
+          this.getOuterHtmlFormatted(child, box);
 
-          var endTag = this.window.document.createElement("hbox");
-          endTag.className = "elementEndTag";
-          this.appendDescription(endTag, "<", null);
-          this.appendDescription(endTag, "/" + node.tagName, "tagName");
-          this.appendDescription(endTag, ">", null);
-          box.appendChild(endTag);
-        }
-        container.appendChild(box);
-        return;
-
-      case node.TEXT_NODE:
-        type = "text";
-        break;
-      case node.CDATA_SECTION_NODE:
-        type = "cdata";
-        break;
-      case node.COMMENT_NODE:
-        type = "comment";
-        break;
-      default:
-        return;
+        let endTag = this.window.document.createElement("hbox");
+        endTag.className = "elementEndTag";
+        this.appendDescription(endTag, "<", null);
+        this.appendDescription(endTag, "/" + node.tagName, "tagName");
+        this.appendDescription(endTag, ">", null);
+        box.appendChild(endTag);
+      }
+      container.appendChild(box);
+      return;
     }
 
-    var text = node.nodeValue.replace(/\r/g, '').replace(/^\s+/, '').replace(/\s+$/, '');
+    let text = node.text.replace(/\r/g, "").trim();
     if (text == "")
       return;
 
-    if (type != "cdata")
-    {
-      text = text.replace(/&/g, "&amp;")
-                 .replace(/</g, "&lt;")
-                 .replace(/>/g, "&gt;");
-    }
-    text = text.replace(/\t/g, "  ");
-    if (type == "cdata")
-      text = "<![CDATA[" + text + "]]>";
-    else if (type == "comment")
+    text = text.replace(/&/g, "&amp;")
+               .replace(/</g, "&lt;")
+               .replace(/>/g, "&gt;")
+               .replace(/\t/g, "  ");
+    if (type == "comment")
       text = "<!--" + text + "-->";
 
-    var lines = text.split("\n");
-    for (var i = 0; i < lines.length; i++)
-      this.appendDescription(container, lines[i].replace(/^\s+/, '').replace(/\s+$/, ''), type);
+    for (let line of text.split("\n"))
+      this.appendDescription(container, line.trim(), type);
   },
 
   showMenu: function()
   {
     var helpBox = E("ehh-helpbox");
     if (helpBox.state == "open")
     {
       helpBox.hidePopup();
       return true;
     }
 
     // Show help box
     helpBox.showPopup(this.browser, -1, -1, "tooltip", "topleft", "topleft");
     return true;
   }
 }
 
 // Makes sure event handlers like Aardvark.onKeyPress always have the correct
 // this pointer set.
 for (let method of ["onKeyPress", "onMouseMove", "onTabSelect"])
   Aardvark[method] = Aardvark[method].bind(Aardvark);