The Tor Browser: layout/forms/nsComboboxControlFrame.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef nsComboboxControlFrame_h___

     7 #define nsComboboxControlFrame_h___

     9 #ifdef DEBUG_evaughan

    10 //#define DEBUG_rods

    11 #endif

    13 #ifdef DEBUG_rods

    14 //#define DO_REFLOW_DEBUG

    15 //#define DO_REFLOW_COUNTER

    16 //#define DO_UNCONSTRAINED_CHECK

    17 //#define DO_PIXELS

    18 //#define DO_NEW_REFLOW

    19 #endif

    21 //Mark used to indicate when onchange has been fired for current combobox item

    22 #define NS_SKIP_NOTIFY_INDEX -2

    24 #include "mozilla/Attributes.h"

    25 #include "nsBlockFrame.h"

    26 #include "nsIFormControlFrame.h"

    27 #include "nsIComboboxControlFrame.h"

    28 #include "nsIAnonymousContentCreator.h"

    29 #include "nsISelectControlFrame.h"

    30 #include "nsIRollupListener.h"

    31 #include "nsIStatefulFrame.h"

    32 #include "nsThreadUtils.h"

    34 class nsStyleContext;

    35 class nsIListControlFrame;

    36 class nsComboboxDisplayFrame;

    37 class nsIDOMEventListener;

    38 class nsIScrollableFrame;

    40 class nsComboboxControlFrame : public nsBlockFrame,

    41                                public nsIFormControlFrame,

    42                                public nsIComboboxControlFrame,

    43                                public nsIAnonymousContentCreator,

    44                                public nsISelectControlFrame,

    45                                public nsIRollupListener,

    46                                public nsIStatefulFrame

    47 {

    48 public:

    49   friend nsIFrame* NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, nsFrameState aFlags);

    50   friend class nsComboboxDisplayFrame;

    52   nsComboboxControlFrame(nsStyleContext* aContext);

    53   ~nsComboboxControlFrame();

    55   NS_DECL_QUERYFRAME

    56   NS_DECL_FRAMEARENA_HELPERS

    58   // nsIAnonymousContentCreator

    59   virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;

    60   virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,

    61                                         uint32_t aFilter) MOZ_OVERRIDE;

    62   virtual nsIFrame* CreateFrameFor(nsIContent* aContent) MOZ_OVERRIDE;

    64 #ifdef ACCESSIBILITY

    65   virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;

    66 #endif

    68   virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;

    70   virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;

    72   virtual nsresult Reflow(nsPresContext*           aCX,

    73                           nsHTMLReflowMetrics&     aDesiredSize,

    74                           const nsHTMLReflowState& aReflowState,

    75                           nsReflowStatus&          aStatus) MOZ_OVERRIDE;

    77   virtual nsresult HandleEvent(nsPresContext* aPresContext,

    78                                mozilla::WidgetGUIEvent* aEvent,

    79                                nsEventStatus* aEventStatus) MOZ_OVERRIDE;

    81   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,

    82                                 const nsRect&           aDirtyRect,

    83                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;

    85   void PaintFocus(nsRenderingContext& aRenderingContext, nsPoint aPt);

    87   // XXXbz this is only needed to prevent the quirk percent height stuff from

    88   // leaking out of the combobox.  We may be able to get rid of this as more

    89   // things move to IsFrameOfType.

    90   virtual nsIAtom* GetType() const MOZ_OVERRIDE;

    92   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE

    93   {

    94     return nsBlockFrame::IsFrameOfType(aFlags &

    95       ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));

    96   }

    98   virtual nsIScrollableFrame* GetScrollTargetFrame() MOZ_OVERRIDE {

    99     return do_QueryFrame(mDropdownFrame);

   100   }

   102 #ifdef DEBUG_FRAME_DUMP

   103   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;

   104 #endif

   105   virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;

   106   virtual nsresult SetInitialChildList(ChildListID     aListID,

   107                                        nsFrameList&    aChildList) MOZ_OVERRIDE;

   108   virtual const nsFrameList& GetChildList(ChildListID aListID) const MOZ_OVERRIDE;

   109   virtual void GetChildLists(nsTArray<ChildList>* aLists) const MOZ_OVERRIDE;

   111   virtual nsIFrame* GetContentInsertionFrame() MOZ_OVERRIDE;

   113   // nsIFormControlFrame

   114   virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue) MOZ_OVERRIDE;

   115   /**

   116    * Inform the control that it got (or lost) focus.

   117    * If it lost focus, the dropdown menu will be rolled up if needed,

   118    * and FireOnChange() will be called.

   119    * @param aOn true if got focus, false if lost focus.

   120    * @param aRepaint if true then force repaint (NOTE: we always force repaint currently)

   121    * @note This method might destroy |this|.

   122    */

   123   virtual void SetFocus(bool aOn, bool aRepaint) MOZ_OVERRIDE;

   125   //nsIComboboxControlFrame

   126   virtual bool IsDroppedDown() MOZ_OVERRIDE { return mDroppedDown; }

   127   /**

   128    * @note This method might destroy |this|.

   129    */

   130   virtual void ShowDropDown(bool aDoDropDown) MOZ_OVERRIDE;

   131   virtual nsIFrame* GetDropDown() MOZ_OVERRIDE;

   132   virtual void SetDropDown(nsIFrame* aDropDownFrame) MOZ_OVERRIDE;

   133   /**

   134    * @note This method might destroy |this|.

   135    */

   136   virtual void RollupFromList() MOZ_OVERRIDE;

   138   /**

   139    * Return the available space above and below this frame for

   140    * placing the drop-down list, and the current 2D translation.

   141    * Note that either or both can be less than or equal to zero,

   142    * if both are then the drop-down should be closed.

   143    */

   144   void GetAvailableDropdownSpace(nscoord* aAbove,

   145                                  nscoord* aBelow,

   146                                  nsPoint* aTranslation);

   147   virtual int32_t GetIndexOfDisplayArea() MOZ_OVERRIDE;

   148   /**

   149    * @note This method might destroy |this|.

   150    */

   151   NS_IMETHOD RedisplaySelectedText() MOZ_OVERRIDE;

   152   virtual int32_t UpdateRecentIndex(int32_t aIndex) MOZ_OVERRIDE;

   153   virtual void OnContentReset() MOZ_OVERRIDE;

   155   // nsISelectControlFrame

   156   NS_IMETHOD AddOption(int32_t index) MOZ_OVERRIDE;

   157   NS_IMETHOD RemoveOption(int32_t index) MOZ_OVERRIDE;

   158   NS_IMETHOD DoneAddingChildren(bool aIsDone) MOZ_OVERRIDE;

   159   NS_IMETHOD OnOptionSelected(int32_t aIndex, bool aSelected) MOZ_OVERRIDE;

   160   NS_IMETHOD OnSetSelectedIndex(int32_t aOldIndex, int32_t aNewIndex) MOZ_OVERRIDE;

   162   //nsIRollupListener

   163   /**

   164    * Hide the dropdown menu and stop capturing mouse events.

   165    * @note This method might destroy |this|.

   166    */

   167   virtual bool Rollup(uint32_t aCount, const nsIntPoint* pos, nsIContent** aLastRolledUp) MOZ_OVERRIDE;

   168   virtual void NotifyGeometryChange() MOZ_OVERRIDE;

   170   /**

   171    * A combobox should roll up if a mousewheel event happens outside of

   172    * the popup area.

   173    */

   174   virtual bool ShouldRollupOnMouseWheelEvent() MOZ_OVERRIDE

   175     { return true; }

   177   virtual bool ShouldConsumeOnMouseWheelEvent() MOZ_OVERRIDE

   178     { return false; }

   180   /**

   181    * A combobox should not roll up if activated by a mouse activate message

   182    * (eg. X-mouse).

   183    */

   184   virtual bool ShouldRollupOnMouseActivate() MOZ_OVERRIDE

   185     { return false; }

   187   virtual uint32_t GetSubmenuWidgetChain(nsTArray<nsIWidget*> *aWidgetChain) MOZ_OVERRIDE

   188     { return 0; }

   190   virtual nsIWidget* GetRollupWidget() MOZ_OVERRIDE;

   192   //nsIStatefulFrame

   193   NS_IMETHOD SaveState(nsPresState** aState) MOZ_OVERRIDE;

   194   NS_IMETHOD RestoreState(nsPresState* aState) MOZ_OVERRIDE;

   196   static bool ToolkitHasNativePopup();

   198 protected:

   199   friend class RedisplayTextEvent;

   200   friend class nsAsyncResize;

   201   friend class nsResizeDropdownAtFinalPosition;

   203   // Utilities

   204   nsresult ReflowDropdown(nsPresContext*          aPresContext,

   205                           const nsHTMLReflowState& aReflowState);

   207   enum DropDownPositionState {

   208     // can't show the dropdown at its current position

   209     eDropDownPositionSuppressed,

   210     // a resize reflow is pending, don't show it yet

   211     eDropDownPositionPendingResize,

   212     // the dropdown has its final size and position and can be displayed here

   213     eDropDownPositionFinal

   214   };

   215   DropDownPositionState AbsolutelyPositionDropDown();

   217   // Helper for GetMinWidth/GetPrefWidth

   218   nscoord GetIntrinsicWidth(nsRenderingContext* aRenderingContext,

   219                             nsLayoutUtils::IntrinsicWidthType aType);

   221   class RedisplayTextEvent : public nsRunnable {

   222   public:

   223     NS_DECL_NSIRUNNABLE

   224     RedisplayTextEvent(nsComboboxControlFrame *c) : mControlFrame(c) {}

   225     void Revoke() { mControlFrame = nullptr; }

   226   private:

   227     nsComboboxControlFrame *mControlFrame;

   228   };

   230   /**

   231    * Show or hide the dropdown list.

   232    * @note This method might destroy |this|.

   233    */

   234   void ShowPopup(bool aShowPopup);

   236   /**

   237    * Show or hide the dropdown list.

   238    * @param aShowList true to show, false to hide the dropdown.

   239    * @note This method might destroy |this|.

   240    * @return false if this frame is destroyed, true if still alive.

   241    */

   242   bool ShowList(bool aShowList);

   243   void CheckFireOnChange();

   244   void FireValueChangeEvent();

   245   nsresult RedisplayText(int32_t aIndex);

   246   void HandleRedisplayTextEvent();

   247   void ActuallyDisplayText(bool aNotify);

   249 private:

   250   // If our total transform to the root frame of the root document is only a 2d

   251   // translation then return that translation, otherwise returns (0,0).

   252   nsPoint GetCSSTransformTranslation();

   254 protected:

   255   nsFrameList              mPopupFrames;             // additional named child list

   256   nsCOMPtr<nsIContent>     mDisplayContent;          // Anonymous content used to display the current selection

   257   nsCOMPtr<nsIContent>     mButtonContent;           // Anonymous content for the button

   258   nsIFrame*                mDisplayFrame;            // frame to display selection

   259   nsIFrame*                mButtonFrame;             // button frame

   260   nsIFrame*                mDropdownFrame;           // dropdown list frame

   261   nsIListControlFrame *    mListControlFrame;        // ListControl Interface for the dropdown frame

   263   // The width of our display area.  Used by that frame's reflow to

   264   // size to the full width except the drop-marker.

   265   nscoord mDisplayWidth;

   267   nsRevocableEventPtr<RedisplayTextEvent> mRedisplayTextEvent;

   269   int32_t               mRecentSelectedIndex;

   270   int32_t               mDisplayedIndex;

   271   nsString              mDisplayedOptionText;

   273   // make someone to listen to the button. If its programmatically pressed by someone like Accessibility

   274   // then open or close the combo box.

   275   nsCOMPtr<nsIDOMEventListener> mButtonListener;

   277   // The last y-positions used for estimating available space above and

   278   // below for the dropdown list in GetAvailableDropdownSpace.  These are

   279   // reset to nscoord_MIN in AbsolutelyPositionDropDown when placing the

   280   // dropdown at its actual position.  The GetAvailableDropdownSpace call

   281   // from nsListControlFrame::ReflowAsDropdown use the last position.

   282   nscoord               mLastDropDownAboveScreenY;

   283   nscoord               mLastDropDownBelowScreenY;

   284   // Current state of the dropdown list, true is dropped down.

   285   bool                  mDroppedDown;

   286   // See comment in HandleRedisplayTextEvent().

   287   bool                  mInRedisplayText;

   288   // Acting on ShowDropDown(true) is delayed until we're focused.

   289   bool                  mDelayedShowDropDown;

   291   // static class data member for Bug 32920

   292   // only one control can be focused at a time

   293   static nsComboboxControlFrame* sFocused;

   295 #ifdef DO_REFLOW_COUNTER

   296   int32_t mReflowId;

   297 #endif

   298 };

   300 #endif

The Tor Browser / file revision

layout/forms/nsComboboxControlFrame.h@97036ab72558

layout/forms/nsComboboxControlFrame.h