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       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/. */
       5             : #ifndef nsResizerFrame_h___
       6             : #define nsResizerFrame_h___
       7             : 
       8             : #include "mozilla/Attributes.h"
       9             : #include "mozilla/EventForwards.h"
      10             : #include "nsTitleBarFrame.h"
      11             : 
      12             : class nsIBaseWindow;
      13             : 
      14           0 : class nsResizerFrame final : public nsTitleBarFrame
      15             : {
      16             : protected:
      17             :   struct Direction {
      18             :     int8_t mHorizontal;
      19             :     int8_t mVertical;
      20             :   };
      21             : 
      22             : public:
      23           0 :   NS_DECL_FRAMEARENA_HELPERS(nsResizerFrame)
      24             : 
      25             :   friend nsIFrame* NS_NewResizerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
      26             : 
      27             :   explicit nsResizerFrame(nsStyleContext* aContext);
      28             : 
      29             :   virtual nsresult HandleEvent(nsPresContext* aPresContext,
      30             :                                mozilla::WidgetGUIEvent* aEvent,
      31             :                                nsEventStatus* aEventStatus) override;
      32             : 
      33             :   virtual void MouseClicked(mozilla::WidgetMouseEvent* aEvent) override;
      34             : 
      35             : protected:
      36             :   nsIContent* GetContentToResize(nsIPresShell* aPresShell, nsIBaseWindow** aWindow);
      37             : 
      38             :   Direction GetDirection();
      39             : 
      40             :   /**
      41             :    * Adjust the window position and size in a direction according to the mouse
      42             :    * movement and the resizer direction. The minimum and maximum size is used
      43             :    * to constrain the size.
      44             :    *
      45             :    * @param aPos left or top position
      46             :    * @param aSize width or height
      47             :    * @param aMinSize minimum width or height
      48             :    * @param aMacSize maximum width or height
      49             :    * @param aMovement the amount the mouse was moved
      50             :    * @param aResizerDirection resizer direction returned by GetDirection
      51             :    */
      52             :   static void AdjustDimensions(int32_t* aPos, int32_t* aSize,
      53             :                                int32_t aMinSize, int32_t aMaxSize,
      54             :                                int32_t aMovement, int8_t aResizerDirection);
      55             : 
      56           0 :   struct SizeInfo {
      57             :     nsString width, height;
      58             :   };
      59             :   static void SizeInfoDtorFunc(void *aObject, nsIAtom *aPropertyName,
      60             :                                void *aPropertyValue, void *aData);
      61             :   static void ResizeContent(nsIContent* aContent, const Direction& aDirection,
      62             :                             const SizeInfo& aSizeInfo, SizeInfo* aOriginalSizeInfo);
      63             :   static void MaybePersistOriginalSize(nsIContent* aContent, const SizeInfo& aSizeInfo);
      64             :   static void RestoreOriginalSize(nsIContent* aContent);
      65             : 
      66             : protected:
      67             :   LayoutDeviceIntRect mMouseDownRect;
      68             :   LayoutDeviceIntPoint mMouseDownPoint;
      69             : }; // class nsResizerFrame
      70             : 
      71             : #endif /* nsResizerFrame_h___ */