layout/base/GeckoMVMContext.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 GeckoMVMContext_h_
   6 #define GeckoMVMContext_h_
   7
   8 #include "MVMContext.h"
   9
  10 #include "mozilla/Attributes.h"  // for MOZ_NON_OWNING_REF
  11 #include "mozilla/RefPtr.h"
  12 #include "nsCOMPtr.h"
  13
  14 namespace mozilla {
  15 class PresShell;
  16 namespace dom {
  17 class Document;
  18 class EventTarget;
  19 }  // namespace dom
  20
  21 /**
  22  * An implementation of MVMContext that uses actual Gecko components.
  23  * This is intended for production use (whereas TestMVMContext is intended for
  24  * testing.)
  25  */
  26 class GeckoMVMContext final : public MVMContext {
  27  public:
  28   explicit GeckoMVMContext(dom::Document* aDocument, PresShell* aPresShell);
  29   void AddEventListener(const nsAString& aType, nsIDOMEventListener* aListener,
  30                         bool aUseCapture) override;
  31   void RemoveEventListener(const nsAString& aType,
  32                            nsIDOMEventListener* aListener,
  33                            bool aUseCapture) override;
  34   void AddObserver(nsIObserver* aObserver, const char* aTopic,
  35                    bool aOwnsWeak) override;
  36   void RemoveObserver(nsIObserver* aObserver, const char* aTopic) override;
  37   void Destroy() override;
  38
  39   nsViewportInfo GetViewportInfo(
  40       const ScreenIntSize& aDisplaySize) const override;
  41   CSSToLayoutDeviceScale CSSToDevPixelScale() const override;
  42   float GetResolution() const override;
  43   bool SubjectMatchesDocument(nsISupports* aSubject) const override;
  44   Maybe<CSSRect> CalculateScrollableRectForRSF() const override;
  45   bool IsResolutionUpdatedByApz() const override;
  46   LayoutDeviceMargin ScrollbarAreaToExcludeFromCompositionBounds()
  47       const override;
  48   Maybe<LayoutDeviceIntSize> GetDocumentViewerSize() const override;
  49   bool AllowZoomingForDocument() const override;
  50   bool IsInReaderMode() const override;
  51   bool IsDocumentLoading() const override;
  52
  53   void SetResolutionAndScaleTo(float aResolution,
  54                                ResolutionChangeOrigin aOrigin) override;
  55   void SetVisualViewportSize(const CSSSize& aSize) override;
  56   void PostVisualViewportResizeEventByDynamicToolbar() override;
  57   void UpdateDisplayPortMargins() override;
  58   MOZ_CAN_RUN_SCRIPT_BOUNDARY void Reflow(const CSSSize& aNewSize) override;
  59   ScreenIntCoord GetDynamicToolbarOffset() override;
  60
  61  private:
  62   RefPtr<dom::Document> mDocument;
  63   // raw ref since the presShell owns this
  64   PresShell* MOZ_NON_OWNING_REF mPresShell;
  65   nsCOMPtr<dom::EventTarget> mEventTarget;
  66 };
  67
  68 }  // namespace mozilla
  69
  70 #endif  // GeckoMVMContext_h_