Issue 2879 - Restructure existing process script, split it up into multiple modules

lib/child/nodeInfo.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/.
  */
 
-const Ci = Components.interfaces;
-const Cu = Components.utils;
-
-let console;
-try
-{
-  // Gecko 44+
-  ({console} = Cu.import("resource://gre/modules/Console.jsm", {}));
-}
-catch (e)
-{
-  ({console} = Cu.import("resource://gre/modules/devtools/Console.jsm", {}));
-}
-
-let DebuggerServer;
-try
-{
-  // Firefox 44+
-  let {require} = Cu.import("resource://devtools/shared/Loader.jsm", {});
-  ({DebuggerServer} = require("devtools/server/main"));
-}
-catch (e)
-{
-  ({DebuggerServer} = Cu.import("resource://gre/modules/devtools/dbg-server.jsm", {}));
-}
+"use strict";
 
 let {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
 
+let messageManager = require("messageManager");
+
 let processID = Services.appinfo.processID;
 let maxNodeID = 0;
 let nodes = new Map();
 
-let name = "elemhidehelper";
-let actor = {
-  constructorFun: Actor,
-  constructorName: name,
-  name: name
-};
-
-addMessageListener("ElemHideHelper:Shutdown", onShutdown);
-addMessageListener("ElemHideHelper:GetNodeInfo", onGetNodeInfo);
-addMessageListener("ElemHideHelper:Preview", onTogglePreview);
-
-DebuggerServer.addTabActor(actor, name);
-
-function onShutdown()
+messageManager.addMessageListener("ElemHideHelper:GetNodeInfo", onGetNodeInfo);
+onShutdown.add(() =>
 {
-  removeMessageListener("ElemHideHelper:Shutdown", onShutdown);
-  removeMessageListener("ElemHideHelper:GetNodeInfo", onGetNodeInfo);
-  removeMessageListener("ElemHideHelper:Preview", onTogglePreview);
-
-  try
-  {
-    DebuggerServer.removeTabActor(actor);
-  }
-  catch (e)
-  {
-    // The call above will throw in the content process despite succeeding,
-    // see https://bugzilla.mozilla.org/show_bug.cgi?id=1189780.
-    Cu.reportError(e);
-  }
-}
+  messageManager.removeMessageListener("ElemHideHelper:GetNodeInfo",
+                                       onGetNodeInfo);
+});
 
 function onGetNodeInfo(message)
 {
   if (Cu.isCrossProcessWrapper(message.objects.element))
     return;
 
   let nodeInfo = getNodeInfo(message.objects.element);
   nodeInfo.messageId = message.data;
-  sendAsyncMessage("ElemHideHelper:GetNodeInfo:Response", nodeInfo);
+  messageManager.sendAsyncMessage("ElemHideHelper:GetNodeInfo:Response",
+                                  nodeInfo);
 }
 
-function onTogglePreview(message)
-{
-  togglePreview(message.data.nodeID, message.data.stylesheetData);
-  if (message.data.forgetNode)
-    forgetNode(message.data.nodeID);
-}
-
-function Actor(connection, tabActor)
-{
-}
-
-Actor.prototype = {
-  requestTypes: {
-    nodeinfo: function(request, connection)
-    {
-      let nodeActor = connection.getActor(request.nodeActor);
-      return getNodeInfo(nodeActor ? nodeActor.rawNode: null);
-    }
-  }
-};
-
 function getNodeInfo(node)
 {
   let nodeData = getNodeData(node);
   if (nodeData)
   {
     let nodeID = processID + "-" + (++maxNodeID);
     nodes.set(nodeID, {document: node.ownerDocument, style: null});
     return {
       host: node.ownerDocument.defaultView.location.hostname,
       nodeData: nodeData,
       nodeID: nodeID
     };
   }
 
   return {};
 }
+exports.getNodeInfo = getNodeInfo;
+
+function getNodeById(nodeId)
+{
+  return nodes.get(nodeId);
+}
+exports.getNodeById = getNodeById;
 
 function getNodeData(node, parentNode)
 {
   if (!node || node.nodeType != Ci.nsIDOMNode.ELEMENT_NODE)
     return null;
 
   let result = {};
   result.tagName = {value: node.tagName, checked: false};
 
   if (typeof parentNode != "undefined")
@@ skipping 31 matching lines @@
     // Make sure ID attribute comes first
     let tmp = result.attributes[1];
     result.attributes[1] = result.attributes[0];
     result.attributes[0] = tmp;
   }
 
   result.customCSS = {selected: "", checked: false};
   return result;
 }
 
-function togglePreview(nodeID, stylesheetData)
-{
-  let context = nodes.get(nodeID);
-  if (!context)
-    return;
-
-  if (stylesheetData)
-  {
-    if (!context.style || !context.style.parentNode)
-    {
-      context.style = context.document.createElementNS(
-          "http://www.w3.org/1999/xhtml", "style");
-      context.style.setAttribute("type", "text/css");
-      context.document.documentElement.appendChild(context.style);
-    }
-    context.style.textContent = stylesheetData;
-  }
-  else
-  {
-    try
-    {
-      if (context.style && context.style.parentNode)
-        context.style.parentNode.removeChild(context.style);
-      context.style = null;
-    }
-    catch (e)
-    {
-      // If the window was closed (reloaded) we end up with a dead object
-      // reference (https://bugzilla.mozilla.org/show_bug.cgi?id=695480). Just
-      // forget this node then.
-      forgetNode(nodeID);
-    }
-  }
-}
-
 function forgetNode(nodeID)
 {
   nodes.delete(nodeID);
 }
+exports.forgetNode = forgetNode;