The Tor Browser: toolkit/content/customizeToolbar.js@6474c204b198 (annotated)

toolkit/content/customizeToolbar.js@6474c204b198 (annotated)

toolkit/content/customizeToolbar.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 # 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/.
 var gToolboxDocument = null;
 var gToolbox = null;
 var gCurrentDragOverItem = null;
 var gToolboxChanged = false;
 var gToolboxSheet = false;
 var gPaletteBox = null;
 Components.utils.import("resource://gre/modules/Services.jsm");
 function onLoad()
 {
   if ("arguments" in window && window.arguments[0]) {
     InitWithToolbox(window.arguments[0]);
     repositionDialog(window);
   }
   else if (window.frameElement &&
            "toolbox" in window.frameElement) {
     gToolboxSheet = true;
     InitWithToolbox(window.frameElement.toolbox);
     repositionDialog(window.frameElement.panel);
   }
 }
 function InitWithToolbox(aToolbox)
 {
   gToolbox = aToolbox;
   dispatchCustomizationEvent("beforecustomization");
   gToolboxDocument = gToolbox.ownerDocument;
   gToolbox.customizing = true;
   forEachCustomizableToolbar(function (toolbar) {
     toolbar.setAttribute("customizing", "true");
   });
   gPaletteBox = document.getElementById("palette-box");
   var elts = getRootElements();
   for (let i=0; i < elts.length; i++) {
     elts[i].addEventListener("dragstart", onToolbarDragStart, true);
     elts[i].addEventListener("dragover", onToolbarDragOver, true);
     elts[i].addEventListener("dragexit", onToolbarDragExit, true);
     elts[i].addEventListener("drop", onToolbarDrop, true);
   }
   initDialog();
 }
 function onClose()
 {
   if (!gToolboxSheet)
     window.close();
   else
     finishToolbarCustomization();
 }
 function onUnload()
 {
   if (!gToolboxSheet)
     finishToolbarCustomization();
 }
 function finishToolbarCustomization()
 {
   removeToolboxListeners();
   unwrapToolbarItems();
   persistCurrentSets();
   gToolbox.customizing = false;
   forEachCustomizableToolbar(function (toolbar) {
     toolbar.removeAttribute("customizing");
   });
   notifyParentComplete();
 }
 function initDialog()
 {
   if (!gToolbox.toolbarset) {
     document.getElementById("newtoolbar").hidden = true;
   }
   var mode = gToolbox.getAttribute("mode");
   document.getElementById("modelist").value = mode;
   var smallIconsCheckbox = document.getElementById("smallicons");
   smallIconsCheckbox.checked = gToolbox.getAttribute("iconsize") == "small";
   if (mode == "text")
     smallIconsCheckbox.disabled = true;
   // Build up the palette of other items.
   buildPalette();
   // Wrap all the items on the toolbar in toolbarpaletteitems.
   wrapToolbarItems();
 }
 function repositionDialog(aWindow)
 {
   // Position the dialog touching the bottom of the toolbox and centered with
   // it.
   if (!aWindow)
     return;
   var width;
   if (aWindow != window)
     width = aWindow.getBoundingClientRect().width;
   else if (document.documentElement.hasAttribute("width"))
     width = document.documentElement.getAttribute("width");
   else
     width = parseInt(document.documentElement.style.width);
   var screenX = gToolbox.boxObject.screenX
                 + ((gToolbox.boxObject.width - width) / 2);
   var screenY = gToolbox.boxObject.screenY + gToolbox.boxObject.height;
   aWindow.moveTo(screenX, screenY);
 }
 function removeToolboxListeners()
 {
   var elts = getRootElements();
   for (let i=0; i < elts.length; i++) {
     elts[i].removeEventListener("dragstart", onToolbarDragStart, true);
     elts[i].removeEventListener("dragover", onToolbarDragOver, true);
     elts[i].removeEventListener("dragexit", onToolbarDragExit, true);
     elts[i].removeEventListener("drop", onToolbarDrop, true);
   }
 }
 /**
  * Invoke a callback on the toolbox to notify it that the dialog is done
  * and going away.
  */
 function notifyParentComplete()
 {
   if ("customizeDone" in gToolbox)
     gToolbox.customizeDone(gToolboxChanged);
   dispatchCustomizationEvent("aftercustomization");
 }
 function toolboxChanged(aType)
 {
   gToolboxChanged = true;
   if ("customizeChange" in gToolbox)
     gToolbox.customizeChange(aType);
   dispatchCustomizationEvent("customizationchange");
 }
 function dispatchCustomizationEvent(aEventName) {
   var evt = document.createEvent("Events");
   evt.initEvent(aEventName, true, true);
   gToolbox.dispatchEvent(evt);
 }
 /**
  * Persist the current set of buttons in all customizable toolbars to
  * localstore.
  */
 function persistCurrentSets()
 {
   if (!gToolboxChanged || gToolboxDocument.defaultView.closed)
     return;
   var customCount = 0;
   forEachCustomizableToolbar(function (toolbar) {
     // Calculate currentset and store it in the attribute.
     var currentSet = toolbar.currentSet;
     toolbar.setAttribute("currentset", currentSet);
     var customIndex = toolbar.hasAttribute("customindex");
     if (customIndex) {
       if (!toolbar.hasChildNodes()) {
         // Remove custom toolbars whose contents have been removed.
         gToolbox.removeChild(toolbar);
       } else if (gToolbox.toolbarset) {
         // Persist custom toolbar info on the <toolbarset/>
         gToolbox.toolbarset.setAttribute("toolbar"+(++customCount),
                                          toolbar.toolbarName + ":" + currentSet);
         gToolboxDocument.persist(gToolbox.toolbarset.id, "toolbar"+customCount);
       }
     }
     if (!customIndex) {
       // Persist the currentset attribute directly on hardcoded toolbars.
       gToolboxDocument.persist(toolbar.id, "currentset");
     }
   });
   // Remove toolbarX attributes for removed toolbars.
   while (gToolbox.toolbarset && gToolbox.toolbarset.hasAttribute("toolbar"+(++customCount))) {
     gToolbox.toolbarset.removeAttribute("toolbar"+customCount);
     gToolboxDocument.persist(gToolbox.toolbarset.id, "toolbar"+customCount);
   }
 }
 /**
  * Wraps all items in all customizable toolbars in a toolbox.
  */
 function wrapToolbarItems()
 {
   forEachCustomizableToolbar(function (toolbar) {
     Array.forEach(toolbar.childNodes, function (item) {
 #ifdef XP_MACOSX
       if (item.firstChild && item.firstChild.localName == "menubar")
         return;
 #endif
       if (isToolbarItem(item)) {
         let wrapper = wrapToolbarItem(item);
         cleanupItemForToolbar(item, wrapper);
       }
     });
   });
 }
 function getRootElements()
 {
   return [gToolbox].concat(gToolbox.externalToolbars);
 }
 /**
  * Unwraps all items in all customizable toolbars in a toolbox.
  */
 function unwrapToolbarItems()
 {
   let elts = getRootElements();
   for (let i=0; i < elts.length; i++) {
     let paletteItems = elts[i].getElementsByTagName("toolbarpaletteitem");
     let paletteItem;
     while ((paletteItem = paletteItems.item(0)) != null) {
       let toolbarItem = paletteItem.firstChild;
       restoreItemForToolbar(toolbarItem, paletteItem);
       paletteItem.parentNode.replaceChild(toolbarItem, paletteItem);
     }
   }
 }
 /**
  * Creates a wrapper that can be used to contain a toolbaritem and prevent
  * it from receiving UI events.
  */
 function createWrapper(aId, aDocument)
 {
   var wrapper = aDocument.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul",
                                          "toolbarpaletteitem");
   wrapper.id = "wrapper-"+aId;
   return wrapper;
 }
 /**
  * Wraps an item that has been cloned from a template and adds
  * it to the end of the palette.
  */
 function wrapPaletteItem(aPaletteItem)
 {
   var wrapper = createWrapper(aPaletteItem.id, document);
   wrapper.appendChild(aPaletteItem);
   // XXX We need to call this AFTER the palette item has been appended
   // to the wrapper or else we crash dropping certain buttons on the
   // palette due to removal of the command and disabled attributes - JRH
   cleanUpItemForPalette(aPaletteItem, wrapper);
   gPaletteBox.appendChild(wrapper);
 }
 /**
  * Wraps an item that is currently on a toolbar and replaces the item
  * with the wrapper. This is not used when dropping items from the palette,
  * only when first starting the dialog and wrapping everything on the toolbars.
  */
 function wrapToolbarItem(aToolbarItem)
 {
   var wrapper = createWrapper(aToolbarItem.id, gToolboxDocument);
   wrapper.flex = aToolbarItem.flex;
   aToolbarItem.parentNode.replaceChild(wrapper, aToolbarItem);
   wrapper.appendChild(aToolbarItem);
   return wrapper;
 }
 /**
  * Get the list of ids for the current set of items on each toolbar.
  */
 function getCurrentItemIds()
 {
   var currentItems = {};
   forEachCustomizableToolbar(function (toolbar) {
     var child = toolbar.firstChild;
     while (child) {
       if (isToolbarItem(child))
         currentItems[child.id] = 1;
       child = child.nextSibling;
     }
   });
   return currentItems;
 }
 /**
  * Builds the palette of draggable items that are not yet in a toolbar.
  */
 function buildPalette()
 {
   // Empty the palette first.
   while (gPaletteBox.lastChild)
     gPaletteBox.removeChild(gPaletteBox.lastChild);
   // Add the toolbar separator item.
   var templateNode = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul",
                                               "toolbarseparator");
   templateNode.id = "separator";
   wrapPaletteItem(templateNode);
   // Add the toolbar spring item.
   templateNode = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul",
                                               "toolbarspring");
   templateNode.id = "spring";
   templateNode.flex = 1;
   wrapPaletteItem(templateNode);
   // Add the toolbar spacer item.
   templateNode = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul",
                                               "toolbarspacer");
   templateNode.id = "spacer";
   templateNode.flex = 1;
   wrapPaletteItem(templateNode);
   var currentItems = getCurrentItemIds();
   templateNode = gToolbox.palette.firstChild;
   while (templateNode) {
     // Check if the item is already in a toolbar before adding it to the palette.
     if (!(templateNode.id in currentItems)) {
       var paletteItem = document.importNode(templateNode, true);
       wrapPaletteItem(paletteItem);
     }
     templateNode = templateNode.nextSibling;
   }
 }
 /**
  * Makes sure that an item that has been cloned from a template
  * is stripped of any attributes that may adversely affect its
  * appearance in the palette.
  */
 function cleanUpItemForPalette(aItem, aWrapper)
 {
   aWrapper.setAttribute("place", "palette");
   setWrapperType(aItem, aWrapper);
   if (aItem.hasAttribute("title"))
     aWrapper.setAttribute("title", aItem.getAttribute("title"));
   else if (aItem.hasAttribute("label"))
     aWrapper.setAttribute("title", aItem.getAttribute("label"));
   else if (isSpecialItem(aItem)) {
     var stringBundle = document.getElementById("stringBundle");
     // Remove the common "toolbar" prefix to generate the string name.
     var title = stringBundle.getString(aItem.localName.slice(7) + "Title");
     aWrapper.setAttribute("title", title);
   }
   aWrapper.setAttribute("tooltiptext", aWrapper.getAttribute("title"));
   // Remove attributes that screw up our appearance.
   aItem.removeAttribute("command");
   aItem.removeAttribute("observes");
   aItem.removeAttribute("type");
   aItem.removeAttribute("width");
   Array.forEach(aWrapper.querySelectorAll("[disabled]"), function(aNode) {
     aNode.removeAttribute("disabled");
   });
 }
 /**
  * Makes sure that an item that has been cloned from a template
  * is stripped of all properties that may adversely affect its
  * appearance in the toolbar.  Store critical properties on the
  * wrapper so they can be put back on the item when we're done.
  */
 function cleanupItemForToolbar(aItem, aWrapper)
 {
   setWrapperType(aItem, aWrapper);
   aWrapper.setAttribute("place", "toolbar");
   if (aItem.hasAttribute("command")) {
     aWrapper.setAttribute("itemcommand", aItem.getAttribute("command"));
     aItem.removeAttribute("command");
   }
   if (aItem.checked) {
     aWrapper.setAttribute("itemchecked", "true");
     aItem.checked = false;
   }
   if (aItem.disabled) {
     aWrapper.setAttribute("itemdisabled", "true");
     aItem.disabled = false;
   }
 }
 /**
  * Restore all the properties that we stripped off above.
  */
 function restoreItemForToolbar(aItem, aWrapper)
 {
   if (aWrapper.hasAttribute("itemdisabled"))
     aItem.disabled = true;
   if (aWrapper.hasAttribute("itemchecked"))
     aItem.checked = true;
   if (aWrapper.hasAttribute("itemcommand")) {
     let commandID = aWrapper.getAttribute("itemcommand");
     aItem.setAttribute("command", commandID);
     //XXX Bug 309953 - toolbarbuttons aren't in sync with their commands after customizing
     let command = gToolboxDocument.getElementById(commandID);
     if (command && command.hasAttribute("disabled"))
       aItem.setAttribute("disabled", command.getAttribute("disabled"));
   }
 }
 function setWrapperType(aItem, aWrapper)
 {
   if (aItem.localName == "toolbarseparator") {
     aWrapper.setAttribute("type", "separator");
   } else if (aItem.localName == "toolbarspring") {
     aWrapper.setAttribute("type", "spring");
   } else if (aItem.localName == "toolbarspacer") {
     aWrapper.setAttribute("type", "spacer");
   } else if (aItem.localName == "toolbaritem" && aItem.firstChild) {
     aWrapper.setAttribute("type", aItem.firstChild.localName);
   }
 }
 function setDragActive(aItem, aValue)
 {
   var node = aItem;
   var direction = window.getComputedStyle(aItem, null).direction;
   var value = direction == "ltr"? "left" : "right";
   if (aItem.localName == "toolbar") {
     node = aItem.lastChild;
     value = direction == "ltr"? "right" : "left";
   }
   if (!node)
     return;
   if (aValue) {
     if (!node.hasAttribute("dragover"))
       node.setAttribute("dragover", value);
   } else {
     node.removeAttribute("dragover");
   }
 }
 function addNewToolbar()
 {
   var promptService = Services.prompt;
   var stringBundle = document.getElementById("stringBundle");
   var message = stringBundle.getString("enterToolbarName");
   var title = stringBundle.getString("enterToolbarTitle");
   var name = {};
   // Quitting from the toolbar dialog while the new toolbar prompt is up
   // can cause things to become unresponsive on the Mac. Until dialog modality
   // is fixed (395465), disable the "Done" button explicitly.
   var doneButton = document.getElementById("donebutton");
   doneButton.disabled = true;
   while (true) {
     if (!promptService.prompt(window, title, message, name, null, {})) {
       doneButton.disabled = false;
       return;
     }
     if (!name.value) {
       message = stringBundle.getFormattedString("enterToolbarBlank", [name.value]);
       continue;
     }
     var dupeFound = false;
      // Check for an existing toolbar with the same display name
     for (let i = 0; i < gToolbox.childNodes.length; ++i) {
       var toolbar = gToolbox.childNodes[i];
       var toolbarName = toolbar.getAttribute("toolbarname");
       if (toolbarName == name.value &&
           toolbar.getAttribute("type") != "menubar" &&
           toolbar.nodeName == 'toolbar') {
         dupeFound = true;
         break;
       }
     }
     if (!dupeFound)
       break;
     message = stringBundle.getFormattedString("enterToolbarDup", [name.value]);
   }
   gToolbox.appendCustomToolbar(name.value, "");
   toolboxChanged();
   doneButton.disabled = false;
 }
 /**
  * Restore the default set of buttons to fixed toolbars,
  * remove all custom toolbars, and rebuild the palette.
  */
 function restoreDefaultSet()
 {
   // Unwrap the items on the toolbar.
   unwrapToolbarItems();
   // Remove all of the customized toolbars.
   var child = gToolbox.lastChild;
   while (child) {
     if (child.hasAttribute("customindex")) {
       var thisChild = child;
       child = child.previousSibling;
       thisChild.currentSet = "__empty";
       gToolbox.removeChild(thisChild);
     } else {
       child = child.previousSibling;
     }
   }
   // Restore the defaultset for fixed toolbars.
   forEachCustomizableToolbar(function (toolbar) {
     var defaultSet = toolbar.getAttribute("defaultset");
     if (defaultSet)
       toolbar.currentSet = defaultSet;
   });
   // Restore the default icon size and mode.
   document.getElementById("smallicons").checked = (updateIconSize() == "small");
   document.getElementById("modelist").value = updateToolbarMode();
   // Now rebuild the palette.
   buildPalette();
   // Now re-wrap the items on the toolbar.
   wrapToolbarItems();
   toolboxChanged("reset");
 }
 function updateIconSize(aSize) {
   return updateToolboxProperty("iconsize", aSize, "large");
 }
 function updateToolbarMode(aModeValue) {
   var mode = updateToolboxProperty("mode", aModeValue, "icons");
   var iconSizeCheckbox = document.getElementById("smallicons");
   iconSizeCheckbox.disabled = mode == "text";
   return mode;
 }
 function updateToolboxProperty(aProp, aValue, aToolkitDefault) {
   var toolboxDefault = gToolbox.getAttribute("default" + aProp) ||
                        aToolkitDefault;
   gToolbox.setAttribute(aProp, aValue || toolboxDefault);
   gToolboxDocument.persist(gToolbox.id, aProp);
   forEachCustomizableToolbar(function (toolbar) {
     var toolbarDefault = toolbar.getAttribute("default" + aProp) ||
                          toolboxDefault;
     if (toolbar.getAttribute("lock" + aProp) == "true" &&
         toolbar.getAttribute(aProp) == toolbarDefault)
       return;
     toolbar.setAttribute(aProp, aValue || toolbarDefault);
     gToolboxDocument.persist(toolbar.id, aProp);
   });
   toolboxChanged(aProp);
   return aValue || toolboxDefault;
 }
 function forEachCustomizableToolbar(callback) {
   Array.filter(gToolbox.childNodes, isCustomizableToolbar).forEach(callback);
   Array.filter(gToolbox.externalToolbars, isCustomizableToolbar).forEach(callback);
 }
 function isCustomizableToolbar(aElt)
 {
   return aElt.localName == "toolbar" &&
          aElt.getAttribute("customizable") == "true";
 }
 function isSpecialItem(aElt)
 {
   return aElt.localName == "toolbarseparator" ||
          aElt.localName == "toolbarspring" ||
          aElt.localName == "toolbarspacer";
 }
 function isToolbarItem(aElt)
 {
   return aElt.localName == "toolbarbutton" ||
          aElt.localName == "toolbaritem" ||
          aElt.localName == "toolbarseparator" ||
          aElt.localName == "toolbarspring" ||
          aElt.localName == "toolbarspacer";
 }
 ///////////////////////////////////////////////////////////////////////////
 //// Drag and Drop observers
 function onToolbarDragExit(aEvent)
 {
   if (isUnwantedDragEvent(aEvent)) {
     return;
   }
   if (gCurrentDragOverItem)
     setDragActive(gCurrentDragOverItem, false);
 }
 function onToolbarDragStart(aEvent)
 {
   var item = aEvent.target;
   while (item && item.localName != "toolbarpaletteitem") {
     if (item.localName == "toolbar")
       return;
     item = item.parentNode;
   }
   item.setAttribute("dragactive", "true");
   var dt = aEvent.dataTransfer;
   var documentId = gToolboxDocument.documentElement.id;
   dt.setData("text/toolbarwrapper-id/" + documentId, item.firstChild.id);
   dt.effectAllowed = "move";
 }
 function onToolbarDragOver(aEvent)
 {
   if (isUnwantedDragEvent(aEvent)) {
     return;
   }
   var documentId = gToolboxDocument.documentElement.id;
   if (!aEvent.dataTransfer.types.contains("text/toolbarwrapper-id/" + documentId.toLowerCase()))
     return;
   var toolbar = aEvent.target;
   var dropTarget = aEvent.target;
   while (toolbar && toolbar.localName != "toolbar") {
     dropTarget = toolbar;
     toolbar = toolbar.parentNode;
   }
   // Make sure we are dragging over a customizable toolbar.
   if (!toolbar || !isCustomizableToolbar(toolbar)) {
     gCurrentDragOverItem = null;
     return;
   }
   var previousDragItem = gCurrentDragOverItem;
   if (dropTarget.localName == "toolbar") {
     gCurrentDragOverItem = dropTarget;
   } else {
     gCurrentDragOverItem = null;
     var direction = window.getComputedStyle(dropTarget.parentNode, null).direction;
     var dropTargetCenter = dropTarget.boxObject.x + (dropTarget.boxObject.width / 2);
     var dragAfter;
     if (direction == "ltr")
       dragAfter = aEvent.clientX > dropTargetCenter;
     else
       dragAfter = aEvent.clientX < dropTargetCenter;
     if (dragAfter) {
       gCurrentDragOverItem = dropTarget.nextSibling;
       if (!gCurrentDragOverItem)
         gCurrentDragOverItem = toolbar;
     } else
       gCurrentDragOverItem = dropTarget;
   }
   if (previousDragItem && gCurrentDragOverItem != previousDragItem) {
     setDragActive(previousDragItem, false);
   }
   setDragActive(gCurrentDragOverItem, true);
   aEvent.preventDefault();
   aEvent.stopPropagation();
 }
 function onToolbarDrop(aEvent)
 {
   if (isUnwantedDragEvent(aEvent)) {
     return;
   }
   if (!gCurrentDragOverItem)
     return;
   setDragActive(gCurrentDragOverItem, false);
   var documentId = gToolboxDocument.documentElement.id;
   var draggedItemId = aEvent.dataTransfer.getData("text/toolbarwrapper-id/" + documentId);
   if (gCurrentDragOverItem.id == draggedItemId)
     return;
   var toolbar = aEvent.target;
   while (toolbar.localName != "toolbar")
     toolbar = toolbar.parentNode;
   var draggedPaletteWrapper = document.getElementById("wrapper-"+draggedItemId);
   if (!draggedPaletteWrapper) {
     // The wrapper has been dragged from the toolbar.
     // Get the wrapper from the toolbar document and make sure that
     // it isn't being dropped on itself.
     var wrapper = gToolboxDocument.getElementById("wrapper-"+draggedItemId);
     if (wrapper == gCurrentDragOverItem)
        return;
     // Don't allow non-removable kids (e.g., the menubar) to move.
     if (wrapper.firstChild.getAttribute("removable") != "true")
       return;
     // Remove the item from its place in the toolbar.
     wrapper.parentNode.removeChild(wrapper);
     // Determine which toolbar we are dropping on.
     var dropToolbar = null;
     if (gCurrentDragOverItem.localName == "toolbar")
       dropToolbar = gCurrentDragOverItem;
     else
       dropToolbar = gCurrentDragOverItem.parentNode;
     // Insert the item into the toolbar.
     if (gCurrentDragOverItem != dropToolbar)
       dropToolbar.insertBefore(wrapper, gCurrentDragOverItem);
     else
       dropToolbar.appendChild(wrapper);
   } else {
     // The item has been dragged from the palette
     // Create a new wrapper for the item. We don't know the id yet.
     var wrapper = createWrapper("", gToolboxDocument);
     // Ask the toolbar to clone the item's template, place it inside the wrapper, and insert it in the toolbar.
     var newItem = toolbar.insertItem(draggedItemId, gCurrentDragOverItem == toolbar ? null : gCurrentDragOverItem, wrapper);
     // Prepare the item and wrapper to look good on the toolbar.
     cleanupItemForToolbar(newItem, wrapper);
     wrapper.id = "wrapper-"+newItem.id;
     wrapper.flex = newItem.flex;
     // Remove the wrapper from the palette.
     if (draggedItemId != "separator" &&
         draggedItemId != "spring" &&
         draggedItemId != "spacer")
       gPaletteBox.removeChild(draggedPaletteWrapper);
   }
   gCurrentDragOverItem = null;
   toolboxChanged();
 };
 function onPaletteDragOver(aEvent)
 {
   if (isUnwantedDragEvent(aEvent)) {
     return;
   }
   var documentId = gToolboxDocument.documentElement.id;
   if (aEvent.dataTransfer.types.contains("text/toolbarwrapper-id/" + documentId.toLowerCase()))
     aEvent.preventDefault();
 }
 function onPaletteDrop(aEvent)
 {
   if (isUnwantedDragEvent(aEvent)) {
     return;
   }
   var documentId = gToolboxDocument.documentElement.id;
   var itemId = aEvent.dataTransfer.getData("text/toolbarwrapper-id/" + documentId);
   var wrapper = gToolboxDocument.getElementById("wrapper-"+itemId);
   if (wrapper) {
     // Don't allow non-removable kids (e.g., the menubar) to move.
     if (wrapper.firstChild.getAttribute("removable") != "true")
       return;
     var wrapperType = wrapper.getAttribute("type");
     if (wrapperType != "separator" &&
         wrapperType != "spacer" &&
         wrapperType != "spring") {
       restoreItemForToolbar(wrapper.firstChild, wrapper);
       wrapPaletteItem(document.importNode(wrapper.firstChild, true));
       gToolbox.palette.appendChild(wrapper.firstChild);
     }
     // The item was dragged out of the toolbar.
     wrapper.parentNode.removeChild(wrapper);
   }
   toolboxChanged();
 }
 function isUnwantedDragEvent(aEvent) {
   try {
     if (Services.prefs.getBoolPref("toolkit.customization.unsafe_drag_events")) {
       return false;
     }
   } catch (ex) {}
   /* Discard drag events that originated from a separate window to
      prevent content->chrome privilege escalations. */
   let mozSourceNode = aEvent.dataTransfer.mozSourceNode;
   // mozSourceNode is null in the dragStart event handler or if
   // the drag event originated in an external application.
   if (!mozSourceNode) {
     return true;
   }
   let sourceWindow = mozSourceNode.ownerDocument.defaultView;
   return sourceWindow != window && sourceWindow != gToolboxDocument.defaultView;
 }