layout/base/MVMContext.h

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #ifndef MVMContext_h_
   6 #define MVMContext_h_
   7
   8 #include "Units.h"
   9 #include "mozilla/Maybe.h"
  10 #include "mozilla/PresShellForwards.h"
  11 #include "nsISupportsImpl.h"
  12 #include "nsStringFwd.h"
  13 #include "nsViewportInfo.h"
  14
  15 class nsIDOMEventListener;
  16 class nsIObserver;
  17 class nsISupports;
  18
  19 namespace mozilla {
  20
  21 /**
  22  * The interface MobileViewportManager uses to interface with its surroundings.
  23  * This mainly exists to facilitate testing MobileViewportManager in isolation
  24  * from the rest of Gecko.
  25  */
  26 class MVMContext {
  27   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MVMContext)
  28  protected:
  29   virtual ~MVMContext() {}
  30
  31  public:
  32   virtual void AddEventListener(const nsAString& aType,
  33                                 nsIDOMEventListener* aListener,
  34                                 bool aUseCapture) = 0;
  35   virtual void RemoveEventListener(const nsAString& aType,
  36                                    nsIDOMEventListener* aListener,
  37                                    bool aUseCapture) = 0;
  38   virtual void AddObserver(nsIObserver* aObserver, const char* aTopic,
  39                            bool aOwnsWeak) = 0;
  40   virtual void RemoveObserver(nsIObserver* aObserver, const char* aTopic) = 0;
  41   virtual void Destroy() = 0;
  42
  43   virtual nsViewportInfo GetViewportInfo(
  44       const ScreenIntSize& aDisplaySize) const = 0;
  45   virtual CSSToLayoutDeviceScale CSSToDevPixelScale() const = 0;
  46   virtual float GetResolution() const = 0;
  47   virtual bool SubjectMatchesDocument(nsISupports* aSubject) const = 0;
  48   virtual Maybe<CSSRect> CalculateScrollableRectForRSF() const = 0;
  49   virtual bool IsResolutionUpdatedByApz() const = 0;
  50   virtual LayoutDeviceMargin ScrollbarAreaToExcludeFromCompositionBounds()
  51       const = 0;
  52   virtual Maybe<LayoutDeviceIntSize> GetContentViewerSize() const = 0;
  53   virtual bool AllowZoomingForDocument() const = 0;
  54   virtual bool IsInReaderMode() const = 0;
  55   virtual bool IsDocumentLoading() const = 0;
  56
  57   virtual void SetResolutionAndScaleTo(float aResolution,
  58                                        ResolutionChangeOrigin aOrigin) = 0;
  59   virtual void SetVisualViewportSize(const CSSSize& aSize) = 0;
  60   virtual void PostVisualViewportResizeEventByDynamicToolbar() = 0;
  61   virtual void UpdateDisplayPortMargins() = 0;
  62
  63   virtual void Reflow(const CSSSize& aNewSize) = 0;
  64 };
  65
  66 }  // namespace mozilla
  67
  68 #endif  // MVMContext_h_