layout/xul/nsResizerFrame.h

   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 class nsMenuPopupFrame;
  14
  15 class nsResizerFrame : public nsTitleBarFrame
  16 {
  17 protected:
  18   struct Direction {
  19     int8_t mHorizontal;
  20     int8_t mVertical;
  21   };
  22
  23 public:
  24   NS_DECL_FRAMEARENA_HELPERS
  25
  26   friend nsIFrame* NS_NewResizerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  27
  28   explicit nsResizerFrame(nsStyleContext* aContext);
  29
  30   virtual nsresult HandleEvent(nsPresContext* aPresContext,
  31                                mozilla::WidgetGUIEvent* aEvent,
  32                                nsEventStatus* aEventStatus) MOZ_OVERRIDE;
  33
  34   virtual void MouseClicked(nsPresContext* aPresContext,
  35                             mozilla::WidgetMouseEvent* aEvent) MOZ_OVERRIDE;
  36
  37 protected:
  38   nsIContent* GetContentToResize(nsIPresShell* aPresShell, nsIBaseWindow** aWindow);
  39
  40   Direction GetDirection();
  41
  42   /**
  43    * Adjust the window position and size in a direction according to the mouse
  44    * movement and the resizer direction. The minimum and maximum size is used
  45    * to constrain the size.
  46    *
  47    * @param aPos left or top position
  48    * @param aSize width or height
  49    * @param aMinSize minimum width or height
  50    * @param aMacSize maximum width or height
  51    * @param aMovement the amount the mouse was moved
  52    * @param aResizerDirection resizer direction returned by GetDirection
  53    */
  54   static void AdjustDimensions(int32_t* aPos, int32_t* aSize,
  55                                int32_t aMinSize, int32_t aMaxSize,
  56                                int32_t aMovement, int8_t aResizerDirection);
  57
  58   struct SizeInfo {
  59     nsString width, height;
  60   };
  61   static void SizeInfoDtorFunc(void *aObject, nsIAtom *aPropertyName,
  62                                void *aPropertyValue, void *aData);
  63   static void ResizeContent(nsIContent* aContent, const Direction& aDirection,
  64                             const SizeInfo& aSizeInfo, SizeInfo* aOriginalSizeInfo);
  65   static void MaybePersistOriginalSize(nsIContent* aContent, const SizeInfo& aSizeInfo);
  66   static void RestoreOriginalSize(nsIContent* aContent);
  67
  68 protected:
  69         nsIntRect mMouseDownRect;
  70         nsIntPoint mMouseDownPoint;
  71 }; // class nsResizerFrame
  72
  73 #endif /* nsResizerFrame_h___ */