LCOV - app.info - objdir/dist/include/nsFocusManager.h

LCOV - code coverage report
| Current view: | directory - objdir/dist/include - nsFocusManager.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 6 | 0 | 0.0 %
| Date: | 2012-07-07 | Functions: | 3 | 0 | 0.0 %

           1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
           2                 : /* ***** BEGIN LICENSE BLOCK *****
           3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           4                 :  *
           5                 :  * The contents of this file are subject to the Mozilla Public License Version
           6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           7                 :  * the License. You may obtain a copy of the License at
           8                 :  * http://www.mozilla.org/MPL/
           9                 :  *
          10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          12                 :  * for the specific language governing rights and limitations under the
          13                 :  * License.
          14                 :  *
          15                 :  * The Original Code is mozila.org code.
          16                 :  *
          17                 :  * The Initial Developer of the Original Code is Mozilla Foundation
          18                 :  * Portions created by the Initial Developer are Copyright (C) 2008
          19                 :  * the Initial Developer. All Rights Reserved.
          20                 :  *
          21                 :  * Contributor(s):
          22                 :  *
          23                 :  * Alternatively, the contents of this file may be used under the terms of
          24                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
          25                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          26                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          27                 :  * of those above. If you wish to allow use of your version of this file only
          28                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          29                 :  * use your version of this file under the terms of the MPL, indicate your
          30                 :  * decision by deleting the provisions above and replace them with the notice
          31                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          32                 :  * the provisions above, a recipient may use your version of this file under
          33                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          34                 :  *
          35                 :  * ***** END LICENSE BLOCK ***** */
          36                 :
          37                 : #ifndef nsFocusManager_h___
          38                 : #define nsFocusManager_h___
          39                 :
          40                 : #include "nsIFocusManager.h"
          41                 : #include "nsWeakReference.h"
          42                 : #include "nsIObserver.h"
          43                 : #include "nsIContent.h"
          44                 : #include "nsIWidget.h"
          45                 :
          46                 : #define FOCUSMETHOD_MASK 0xF000
          47                 : #define FOCUSMETHODANDRING_MASK 0xF0F000
          48                 :
          49                 : #define FOCUSMANAGER_CONTRACTID "@mozilla.org/focus-manager;1"
          50                 :
          51                 : class nsIDocShellTreeItem;
          52                 : class nsPIDOMWindow;
          53                 :
          54                 : namespace mozilla {
          55                 : namespace dom {
          56                 :   class TabParent;
          57                 : }
          58                 : }
          59                 :
          60                 : struct nsDelayedBlurOrFocusEvent;
          61                 :
          62                 : /**
          63                 :  * The focus manager keeps track of where the focus is, that is, the node
          64                 :  * which receives key events.
          65                 :  */
          66                 :
          67                 : class nsFocusManager : public nsIFocusManager,
          68                 :                        public nsIObserver,
          69                 :                        public nsSupportsWeakReference
          70                 : {
          71                 :   typedef mozilla::widget::InputContextAction InputContextAction;
          72                 :
          73                 : public:
          74                 :
          75                 :   NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsFocusManager, nsIFocusManager)
          76                 :   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
          77                 :   NS_DECL_NSIOBSERVER
          78                 :   NS_DECL_NSIFOCUSMANAGER
          79                 :
          80                 :   // called to initialize and stop the focus manager at startup and shutdown
          81                 :   static nsresult Init();
          82                 :   static void Shutdown();
          83                 :
          84                 :   /**
          85                 :    * Retrieve the single focus manager.
          86                 :    */
          87               0 :   static nsFocusManager* GetFocusManager() { return sInstance; }
          88                 :
          89                 :   /**
          90                 :    * A faster version of nsIFocusManager::GetFocusedElement, returning a
          91                 :    * raw nsIContent pointer (instead of having AddRef-ed nsIDOMElement
          92                 :    * pointer filled in to an out-parameter).
          93                 :    */
          94               0 :   nsIContent* GetFocusedContent() { return mFocusedContent; }
          95                 :
          96                 :   /**
          97                 :    * Called when content has been removed.
          98                 :    */
          99                 :   nsresult ContentRemoved(nsIDocument* aDocument, nsIContent* aContent);
         100                 :
         101                 :   /**
         102                 :    * Called when mouse button down event handling is started and finished.
         103                 :    */
         104               0 :   void SetMouseButtonDownHandlingDocument(nsIDocument* aDocument)
         105                 :   {
         106               0 :     NS_ASSERTION(!aDocument || !mMouseDownEventHandlingDocument,
         107                 :                  "Some mouse button down events are nested?");
         108               0 :     mMouseDownEventHandlingDocument = aDocument;
         109               0 :   }
         110                 :
         111                 :   /**
         112                 :    * Returns the content node that would be focused if aWindow was in an
         113                 :    * active window. This will traverse down the frame hierarchy, starting at
         114                 :    * the given window aWindow. Sets aFocusedWindow to the window with the
         115                 :    * document containing aFocusedContent. If no element is focused,
         116                 :    * aFocusedWindow may be still be set -- this means that the document is
         117                 :    * focused but no element within it is focused.
         118                 :    *
         119                 :    * aWindow and aFocusedWindow must both be non-null.
         120                 :    */
         121                 :   static nsIContent* GetFocusedDescendant(nsPIDOMWindow* aWindow, bool aDeep,
         122                 :                                           nsPIDOMWindow** aFocusedWindow);
         123                 :
         124                 :   /**
         125                 :    * Returns the content node that focus will be redirected to if aContent was
         126                 :    * focused. This is used for the special case of certain XUL elements such
         127                 :    * as textboxes which redirect focus to an anonymous child.
         128                 :    *
         129                 :    * aContent must be non-null.
         130                 :    *
         131                 :    * XXXndeakin this should be removed eventually but I want to do that as
         132                 :    * followup work.
         133                 :    */
         134                 :   static nsIContent* GetRedirectedFocus(nsIContent* aContent);
         135                 :
         136                 :   /**
         137                 :    * Returns an InputContextAction cause for aFlags.
         138                 :    */
         139                 :   static InputContextAction::Cause GetFocusMoveActionCause(PRUint32 aFlags);
         140                 :
         141                 :   static bool sMouseFocusesFormControl;
         142                 :
         143                 : protected:
         144                 :
         145                 :   nsFocusManager();
         146                 :   ~nsFocusManager();
         147                 :
         148                 :   /**
         149                 :    * Ensure that the widget associated with the currently focused window is
         150                 :    * focused at the widget level.
         151                 :    */
         152                 :   void EnsureCurrentWidgetFocused();
         153                 :
         154                 :   /**
         155                 :    * Blur whatever is currently focused and focus aNewContent. aFlags is a
         156                 :    * bitmask of the flags defined in nsIFocusManager. If aFocusChanged is
         157                 :    * true, then the focus has actually shifted and the caret position will be
         158                 :    * updated to the new focus, aNewContent will be scrolled into view (unless
         159                 :    * a flag disables this) and the focus method for the window will be updated.
         160                 :    * If aAdjustWidget is false, don't change the widget focus state.
         161                 :    *
         162                 :    * All actual focus changes must use this method to do so. (as opposed
         163                 :    * to those that update the focus in an inactive window for instance).
         164                 :    */
         165                 :   void SetFocusInner(nsIContent* aNewContent, PRInt32 aFlags,
         166                 :                      bool aFocusChanged, bool aAdjustWidget);
         167                 :
         168                 :   /**
         169                 :    * Returns true if aPossibleAncestor is the same as aWindow or an
         170                 :    * ancestor of aWindow.
         171                 :    */
         172                 :   bool IsSameOrAncestor(nsPIDOMWindow* aPossibleAncestor,
         173                 :                           nsPIDOMWindow* aWindow);
         174                 :
         175                 :   /**
         176                 :    * Returns the window that is the lowest common ancestor of both aWindow1
         177                 :    * and aWindow2, or null if they share no common ancestor.
         178                 :    */
         179                 :   already_AddRefed<nsPIDOMWindow> GetCommonAncestor(nsPIDOMWindow* aWindow1,
         180                 :                                                     nsPIDOMWindow* aWindow2);
         181                 :
         182                 :   /**
         183                 :    * When aNewWindow is focused, adjust the ancestors of aNewWindow so that they
         184                 :    * also have their corresponding frames focused. Thus, one can start at
         185                 :    * the active top-level window and navigate down the currently focused
         186                 :    * elements for each frame in the tree to get to aNewWindow.
         187                 :    */
         188                 :   void AdjustWindowFocus(nsPIDOMWindow* aNewWindow, bool aCheckPermission);
         189                 :
         190                 :   /**
         191                 :    * Returns true if aWindow is visible.
         192                 :    */
         193                 :   bool IsWindowVisible(nsPIDOMWindow* aWindow);
         194                 :
         195                 :   /**
         196                 :    * Returns true if aContent is a root element and not focusable.
         197                 :    * I.e., even if aContent is editable root element, this returns true when
         198                 :    * the document is in designMode.
         199                 :    *
         200                 :    * @param aContent must not be null and must be in a document.
         201                 :    */
         202                 :   bool IsNonFocusableRoot(nsIContent* aContent);
         203                 :
         204                 :   /**
         205                 :    * Checks and returns aContent if it may be focused, another content node if
         206                 :    * the focus should be retargeted at another node, or null if the node
         207                 :    * cannot be focused. aFlags are the flags passed to SetFocus and similar
         208                 :    * methods.
         209                 :    *
         210                 :    * An element is focusable if it is in a document, the document isn't in
         211                 :    * print preview mode and the element has an nsIFrame where the
         212                 :    * CheckIfFocusable method returns true. For <area> elements, there is no
         213                 :    * frame, so only the IsFocusable method on the content node must be
         214                 :    * true.
         215                 :    */
         216                 :   nsIContent* CheckIfFocusable(nsIContent* aContent, PRUint32 aFlags);
         217                 :
         218                 :   /**
         219                 :    * Blurs the currently focused element. Returns false if another element was
         220                 :    * focused as a result. This would mean that the caller should not proceed
         221                 :    * with a pending call to Focus. Normally, true would be returned.
         222                 :    *
         223                 :    * The currently focused element within aWindowToClear will be cleared.
         224                 :    * aWindowToClear may be null, which means that no window is cleared. This
         225                 :    * will be the case, for example, when lowering a window, as we want to fire
         226                 :    * a blur, but not actually change what element would be focused, so that
         227                 :    * the same element will be focused again when the window is raised.
         228                 :    *
         229                 :    * aAncestorWindowToFocus should be set to the common ancestor of the window
         230                 :    * that is being blurred and the window that is going to focused, when
         231                 :    * switching focus to a sibling window.
         232                 :    *
         233                 :    * aIsLeavingDocument should be set to true if the document/window is being
         234                 :    * blurred as well. Document/window blur events will be fired. It should be
         235                 :    * false if an element is the same document is about to be focused.
         236                 :    *
         237                 :    * If aAdjustWidget is false, don't change the widget focus state.
         238                 :    */
         239                 :   bool Blur(nsPIDOMWindow* aWindowToClear,
         240                 :               nsPIDOMWindow* aAncestorWindowToFocus,
         241                 :               bool aIsLeavingDocument,
         242                 :               bool aAdjustWidget);
         243                 :
         244                 :   /**
         245                 :    * Focus an element in the active window and child frame.
         246                 :    *
         247                 :    * aWindow is the window containing the element aContent to focus.
         248                 :    *
         249                 :    * aFlags is the flags passed to the various focus methods in
         250                 :    * nsIFocusManager.
         251                 :    *
         252                 :    * aIsNewDocument should be true if a new document is being focused.
         253                 :    * Document/window focus events will be fired.
         254                 :    *
         255                 :    * aFocusChanged should be true if a new content node is being focused, so
         256                 :    * the focused content will be scrolled into view and the caret position
         257                 :    * will be updated. If false is passed, then a window is simply being
         258                 :    * refocused, for instance, due to a window being raised, or a tab is being
         259                 :    * switched to.
         260                 :    *
         261                 :    * If aFocusChanged is true, then the focus has moved to a new location.
         262                 :    * Otherwise, the focus is just being updated because the window was
         263                 :    * raised.
         264                 :    *
         265                 :    * aWindowRaised should be true if the window is being raised. In this case,
         266                 :    * command updaters will not be called.
         267                 :    *
         268                 :    * If aAdjustWidget is false, don't change the widget focus state.
         269                 :    */
         270                 :   void Focus(nsPIDOMWindow* aWindow,
         271                 :              nsIContent* aContent,
         272                 :              PRUint32 aFlags,
         273                 :              bool aIsNewDocument,
         274                 :              bool aFocusChanged,
         275                 :              bool aWindowRaised,
         276                 :              bool aAdjustWidget);
         277                 :
         278                 :   /**
         279                 :    * Fires a focus or blur event at aTarget.
         280                 :    *
         281                 :    * aType should be either NS_FOCUS_CONTENT or NS_BLUR_CONTENT. For blur
         282                 :    * events, aFocusMethod should normally be non-zero.
         283                 :    *
         284                 :    * aWindowRaised should only be true if called from WindowRaised.
         285                 :    */
         286                 :   void SendFocusOrBlurEvent(PRUint32 aType,
         287                 :                             nsIPresShell* aPresShell,
         288                 :                             nsIDocument* aDocument,
         289                 :                             nsISupports* aTarget,
         290                 :                             PRUint32 aFocusMethod,
         291                 :                             bool aWindowRaised,
         292                 :                             bool aIsRefocus = false);
         293                 :
         294                 :   /**
         295                 :    * Scrolls aContent into view unless the FLAG_NOSCROLL flag is set.
         296                 :    */
         297                 :   void ScrollIntoView(nsIPresShell* aPresShell,
         298                 :                       nsIContent* aContent,
         299                 :                       PRUint32 aFlags);
         300                 :
         301                 :   /**
         302                 :    * Raises the top-level window aWindow at the widget level.
         303                 :    */
         304                 :   void RaiseWindow(nsPIDOMWindow* aWindow);
         305                 :
         306                 :   /**
         307                 :    * Updates the caret positon and visibility to match the focus.
         308                 :    *
         309                 :    * aMoveCaretToFocus should be true to move the caret to aContent.
         310                 :    *
         311                 :    * aUpdateVisibility should be true to update whether the caret is
         312                 :    * visible or not.
         313                 :    */
         314                 :   void UpdateCaret(bool aMoveCaretToFocus,
         315                 :                    bool aUpdateVisibility,
         316                 :                    nsIContent* aContent);
         317                 :
         318                 :   /**
         319                 :    * Helper method to move the caret to the focused element aContent.
         320                 :    */
         321                 :   void MoveCaretToFocus(nsIPresShell* aPresShell, nsIContent* aContent);
         322                 :
         323                 :   /**
         324                 :    * Makes the caret visible or not, depending on aVisible.
         325                 :    */
         326                 :   nsresult SetCaretVisible(nsIPresShell* aPresShell,
         327                 :                            bool aVisible,
         328                 :                            nsIContent* aContent);
         329                 :
         330                 :
         331                 :   // the remaining functions are used for tab key and document-navigation
         332                 :
         333                 :   /**
         334                 :    * Retrieves the start and end points of the current selection for
         335                 :    * aDocument and stores them in aStartContent and aEndContent.
         336                 :    */
         337                 :   nsresult GetSelectionLocation(nsIDocument* aDocument,
         338                 :                                 nsIPresShell* aPresShell,
         339                 :                                 nsIContent **aStartContent,
         340                 :                                 nsIContent **aEndContent);
         341                 :
         342                 :   /**
         343                 :    * Helper function for MoveFocus which determines the next element
         344                 :    * to move the focus to and returns it in aNextContent.
         345                 :    *
         346                 :    * aWindow is the window to adjust the focus within, and aStart is
         347                 :    * the element to start navigation from. For tab key navigation,
         348                 :    * this should be the currently focused element.
         349                 :    *
         350                 :    * aType is the type passed to MoveFocus. If aNoParentTraversal is set,
         351                 :    * navigation is not done to parent documents and iteration returns to the
         352                 :    * beginning (or end) of the starting document.
         353                 :    */
         354                 :   nsresult DetermineElementToMoveFocus(nsPIDOMWindow* aWindow,
         355                 :                                        nsIContent* aStart,
         356                 :                                        PRInt32 aType, bool aNoParentTraversal,
         357                 :                                        nsIContent** aNextContent);
         358                 :
         359                 :   /**
         360                 :    * Retrieve the next tabbable element within a document, using focusability
         361                 :    * and tabindex to determine the tab order. The element is returned in
         362                 :    * aResultContent.
         363                 :    *
         364                 :    * aRootContent is the root node -- nodes above this will not be examined.
         365                 :    * Typically this will be the root node of a document, but could also be
         366                 :    * a popup node.
         367                 :    *
         368                 :    * aOriginalStartContent is the content which was originally the starting
         369                 :    * node, in the case of recursive or looping calls.
         370                 :    *
         371                 :    * aStartContent is the starting point for this call of this method.
         372                 :    * If aStartContent doesn't have visual representation, the next content
         373                 :    * object, which does have a primary frame, will be used as a start.
         374                 :    * If that content object is focusable, the method may return it.
         375                 :    *
         376                 :    * aForward should be true for forward navigation or false for backward
         377                 :    * navigation.
         378                 :    *
         379                 :    * aCurrentTabIndex is the current tabindex.
         380                 :    *
         381                 :    * aIgnoreTabIndex to ignore the current tabindex and find the element
         382                 :    * irrespective or the tab index. This will be true when a selection is
         383                 :    * active, since we just want to focus the next element in tree order
         384                 :    * from where the selection is. Similarly, if the starting element isn't
         385                 :    * focusable, since it doesn't really have a defined tab index.
         386                 :    */
         387                 :   nsresult GetNextTabbableContent(nsIPresShell* aPresShell,
         388                 :                                   nsIContent* aRootContent,
         389                 :                                   nsIContent* aOriginalStartContent,
         390                 :                                   nsIContent* aStartContent,
         391                 :                                   bool aForward,
         392                 :                                   PRInt32 aCurrentTabIndex,
         393                 :                                   bool aIgnoreTabIndex,
         394                 :                                   nsIContent** aResultContent);
         395                 :
         396                 :   /**
         397                 :    * Get the next tabbable image map area and returns it.
         398                 :    *
         399                 :    * aForward should be true for forward navigation or false for backward
         400                 :    * navigation.
         401                 :    *
         402                 :    * aCurrentTabIndex is the current tabindex.
         403                 :    *
         404                 :    * aImageContent is the image.
         405                 :    *
         406                 :    * aStartContent is the current image map area.
         407                 :    */
         408                 :   nsIContent* GetNextTabbableMapArea(bool aForward,
         409                 :                                      PRInt32 aCurrentTabIndex,
         410                 :                                      nsIContent* aImageContent,
         411                 :                                      nsIContent* aStartContent);
         412                 :
         413                 :   /**
         414                 :    * Return the next valid tabindex value after aCurrentTabIndex, if aForward
         415                 :    * is true, or the previous tabindex value if aForward is false. aParent is
         416                 :    * the node from which to start looking for tab indicies.
         417                 :    */
         418                 :   PRInt32 GetNextTabIndex(nsIContent* aParent,
         419                 :                           PRInt32 aCurrentTabIndex,
         420                 :                           bool aForward);
         421                 :
         422                 :   /**
         423                 :    * Retrieves and returns the root node from aDocument to be focused. Will
         424                 :    * return null if the root node cannot be focused. There are several reasons
         425                 :    * for this:
         426                 :    *
         427                 :    * - if aIsForDocNavigation is true, and aWindow is in an <iframe>.
         428                 :    * - if aIsForDocNavigation is false, and aWindow is a chrome shell.
         429                 :    * - if aCheckVisibility is true and the aWindow is not visible.
         430                 :    * - if aDocument is a frameset document.
         431                 :    */
         432                 :   nsIContent* GetRootForFocus(nsPIDOMWindow* aWindow,
         433                 :                               nsIDocument* aDocument,
         434                 :                               bool aIsForDocNavigation,
         435                 :                               bool aCheckVisibility);
         436                 :
         437                 :   /**
         438                 :    * Get the TabParent associated with aContent if it is a remote browser,
         439                 :    * or null in all other cases.
         440                 :    */
         441                 :   mozilla::dom::TabParent* GetRemoteForContent(nsIContent* aContent);
         442                 :
         443                 :   /**
         444                 :    * Get the last docshell child of aItem and return it in aResult.
         445                 :    */
         446                 :   void GetLastDocShell(nsIDocShellTreeItem* aItem,
         447                 :                        nsIDocShellTreeItem** aResult);
         448                 :
         449                 :   /**
         450                 :    * Get the next docshell child of aItem and return it in aResult.
         451                 :    */
         452                 :   void GetNextDocShell(nsIDocShellTreeItem* aItem,
         453                 :                        nsIDocShellTreeItem** aResult);
         454                 :
         455                 :   /**
         456                 :    * Get the previous docshell child of aItem and return it in aResult.
         457                 :    */
         458                 :   void GetPreviousDocShell(nsIDocShellTreeItem* aItem,
         459                 :                            nsIDocShellTreeItem** aResult);
         460                 :
         461                 :   /**
         462                 :    * Determine the first panel with focusable content in document tab order
         463                 :    * from the given document. aForward indicates the direction to scan. If
         464                 :    * aCurrentPopup is set to a panel, the next or previous popup after
         465                 :    * aCurrentPopup after it is used. If aCurrentPopup is null, then the first
         466                 :    * or last popup is used. If a panel has no focusable content, it is skipped.
         467                 :    * Null is returned if no panel is open or no open panel contains a focusable
         468                 :    * element.
         469                 :    */
         470                 :   nsIContent* GetNextTabbablePanel(nsIDocument* aDocument, nsIFrame* aCurrentPopup, bool aForward);
         471                 :
         472                 :   /**
         473                 :    * Get the tabbable next document from aStartContent or, if null, the
         474                 :    * currently focused frame if aForward is true, or the previously tabbable
         475                 :    * document if aForward is false. If this document is a chrome or frameset
         476                 :    * document, returns the first focusable element within this document,
         477                 :    * otherwise, returns the root node of the document.
         478                 :    *
         479                 :    *
         480                 :    * Panels with focusable content are also placed in the cycling order, just
         481                 :    * after the document containing that panel.
         482                 :    *
         483                 :    * This method would be used for document navigation, which is typically
         484                 :    * invoked by pressing F6.
         485                 :    */
         486                 :   nsIContent* GetNextTabbableDocument(nsIContent* aStartContent, bool aForward);
         487                 :
         488                 :   /**
         489                 :    * Retreives a focusable element within the current selection of aWindow.
         490                 :    * Currently, this only detects links.
         491                 :    *
         492                 :    * This is used when MoveFocus is called with a type of MOVEFOCUS_CARET,
         493                 :    * which is used, for example, to focus links as the caret is moved over
         494                 :    * them.
         495                 :    */
         496                 :   void GetFocusInSelection(nsPIDOMWindow* aWindow,
         497                 :                            nsIContent* aStartSelection,
         498                 :                            nsIContent* aEndSelection,
         499                 :                            nsIContent** aFocusedContent);
         500                 :
         501                 : private:
         502                 :   // Notify that the focus state of aContent has changed.  Note that
         503                 :   // we need to pass in whether the window should show a focus ring
         504                 :   // before the SetFocusedNode call on it happened when losing focus
         505                 :   // and after the SetFocusedNode call when gaining focus, which is
         506                 :   // why that information needs to be an explicit argument instead of
         507                 :   // just passing in the window and asking it whether it should show
         508                 :   // focus rings: in the losing focus case that information could be
         509                 :   // wrong..
         510                 :   static void NotifyFocusStateChange(nsIContent* aContent,
         511                 :                                      bool aWindowShouldShowFocusRing,
         512                 :                                      bool aGettingFocus);
         513                 :
         514                 :   // the currently active and front-most top-most window
         515                 :   nsCOMPtr<nsPIDOMWindow> mActiveWindow;
         516                 :
         517                 :   // the child or top-level window that is currently focused. This window will
         518                 :   // either be the same window as mActiveWindow or a descendant of it.
         519                 :   nsCOMPtr<nsPIDOMWindow> mFocusedWindow;
         520                 :
         521                 :   // the currently focused content, which is always inside mFocusedWindow. This
         522                 :   // is a cached copy of the mFocusedWindow's current content. This may be null
         523                 :   // if no content is focused.
         524                 :   nsCOMPtr<nsIContent> mFocusedContent;
         525                 :
         526                 :   // these fields store a content node temporarily while it is being focused
         527                 :   // or blurred to ensure that a recursive call doesn't refire the same event.
         528                 :   // They will always be cleared afterwards.
         529                 :   nsCOMPtr<nsIContent> mFirstBlurEvent;
         530                 :   nsCOMPtr<nsIContent> mFirstFocusEvent;
         531                 :
         532                 :   // keep track of a window while it is being lowered
         533                 :   nsCOMPtr<nsPIDOMWindow> mWindowBeingLowered;
         534                 :
         535                 :   // synchronized actions cannot be interrupted with events, so queue these up
         536                 :   // and fire them later.
         537                 :   nsTArray<nsDelayedBlurOrFocusEvent> mDelayedBlurFocusEvents;
         538                 :
         539                 :   // A document which is handling a mouse button down event.
         540                 :   // When a mouse down event process is finished, ESM sets focus to the target
         541                 :   // content.  Therefore, while DOM event handlers are handling mouse down
         542                 :   // events, the handlers should be able to steal focus from any elements even
         543                 :   // if focus is in chrome content.  So, if this isn't NULL and the caller
         544                 :   // can access the document node, the caller should succeed in moving focus.
         545                 :   nsCOMPtr<nsIDocument> mMouseDownEventHandlingDocument;
         546                 :
         547                 :   static bool sTestMode;
         548                 :
         549                 :   // the single focus manager
         550                 :   static nsFocusManager* sInstance;
         551                 : };
         552                 :
         553                 : nsresult
         554                 : NS_NewFocusManager(nsIFocusManager** aResult);
         555                 :
         556                 : #endif

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