layout/forms/nsFileControlFrame.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
   6 #ifndef nsFileControlFrame_h___
   7 #define nsFileControlFrame_h___
   8
   9 #include "mozilla/Attributes.h"
  10 #include "nsBlockFrame.h"
  11 #include "nsIFormControlFrame.h"
  12 #include "nsIDOMEventListener.h"
  13 #include "nsIAnonymousContentCreator.h"
  14 #include "nsCOMPtr.h"
  15
  16 class nsTextControlFrame;
  17 class nsIDOMDataTransfer;
  18
  19 class nsFileControlFrame : public nsBlockFrame,
  20                            public nsIFormControlFrame,
  21                            public nsIAnonymousContentCreator
  22 {
  23 public:
  24   explicit nsFileControlFrame(nsStyleContext* aContext);
  25
  26   virtual void Init(nsIContent*       aContent,
  27                     nsContainerFrame* aParent,
  28                     nsIFrame*         aPrevInFlow) MOZ_OVERRIDE;
  29
  30   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  31                                 const nsRect&           aDirtyRect,
  32                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
  33
  34   NS_DECL_QUERYFRAME
  35   NS_DECL_FRAMEARENA_HELPERS
  36
  37   // nsIFormControlFrame
  38   virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue) MOZ_OVERRIDE;
  39   virtual void SetFocus(bool aOn, bool aRepaint) MOZ_OVERRIDE;
  40
  41   virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
  42
  43   virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
  44
  45 #ifdef DEBUG_FRAME_DUMP
  46   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
  47 #endif
  48
  49   virtual nsresult AttributeChanged(int32_t         aNameSpaceID,
  50                                     nsIAtom*        aAttribute,
  51                                     int32_t         aModType) MOZ_OVERRIDE;
  52   virtual void ContentStatesChanged(mozilla::EventStates aStates) MOZ_OVERRIDE;
  53   virtual bool IsLeaf() const MOZ_OVERRIDE
  54   {
  55     return true;
  56   }
  57
  58   // nsIAnonymousContentCreator
  59   virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;
  60   virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
  61                                         uint32_t aFilter) MOZ_OVERRIDE;
  62
  63 #ifdef ACCESSIBILITY
  64   virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
  65 #endif
  66
  67   typedef bool (*AcceptAttrCallback)(const nsAString&, void*);
  68
  69 protected:
  70
  71   class MouseListener;
  72   friend class MouseListener;
  73   class MouseListener : public nsIDOMEventListener {
  74   public:
  75     NS_DECL_ISUPPORTS
  76
  77     explicit MouseListener(nsFileControlFrame* aFrame)
  78      : mFrame(aFrame)
  79     {}
  80
  81     void ForgetFrame() {
  82       mFrame = nullptr;
  83     }
  84
  85   protected:
  86     virtual ~MouseListener() {}
  87
  88     nsFileControlFrame* mFrame;
  89   };
  90
  91   class SyncDisabledStateEvent;
  92   friend class SyncDisabledStateEvent;
  93   class SyncDisabledStateEvent : public nsRunnable
  94   {
  95   public:
  96     explicit SyncDisabledStateEvent(nsFileControlFrame* aFrame)
  97       : mFrame(aFrame)
  98     {}
  99
 100     NS_IMETHOD Run() MOZ_OVERRIDE {
 101       nsFileControlFrame* frame = static_cast<nsFileControlFrame*>(mFrame.GetFrame());
 102       NS_ENSURE_STATE(frame);
 103
 104       frame->SyncDisabledState();
 105       return NS_OK;
 106     }
 107
 108   private:
 109     nsWeakFrame mFrame;
 110   };
 111
 112   class DnDListener: public MouseListener {
 113   public:
 114     explicit DnDListener(nsFileControlFrame* aFrame)
 115       : MouseListener(aFrame)
 116     {}
 117
 118     NS_DECL_NSIDOMEVENTLISTENER
 119
 120     static bool IsValidDropData(nsIDOMDataTransfer* aDOMDataTransfer);
 121     static bool CanDropTheseFiles(nsIDOMDataTransfer* aDOMDataTransfer, bool aSupportsMultiple);
 122   };
 123
 124   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
 125   {
 126     return nsBlockFrame::IsFrameOfType(aFlags &
 127       ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
 128   }
 129
 130   /**
 131    * The text box input.
 132    * @see nsFileControlFrame::CreateAnonymousContent
 133    */
 134   nsCOMPtr<nsIContent> mTextContent;
 135   /**
 136    * The browse button input.
 137    * @see nsFileControlFrame::CreateAnonymousContent
 138    */
 139   nsCOMPtr<nsIContent> mBrowse;
 140
 141   /**
 142    * Drag and drop mouse listener.
 143    * This makes sure we don't get used after destruction.
 144    */
 145   nsRefPtr<DnDListener> mMouseListener;
 146
 147 protected:
 148   /**
 149    * Sync the disabled state of the content with anonymous children.
 150    */
 151   void SyncDisabledState();
 152
 153   /**
 154    * Updates the displayed value by using aValue.
 155    */
 156   void UpdateDisplayedValue(const nsAString& aValue, bool aNotify);
 157 };
 158
 159 #endif // nsFileControlFrame_h___