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Diffstat (limited to '')
| -rw-r--r-- | gfx/layers/apz/public/GeckoContentController.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/gfx/layers/apz/public/GeckoContentController.h b/gfx/layers/apz/public/GeckoContentController.h new file mode 100644 index 0000000000..abfef68caa --- /dev/null +++ b/gfx/layers/apz/public/GeckoContentController.h @@ -0,0 +1,187 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef mozilla_layers_GeckoContentController_h +#define mozilla_layers_GeckoContentController_h + +#include "GeckoContentControllerTypes.h" +#include "InputData.h" // for PinchGestureInput +#include "LayersTypes.h" // for ScrollDirection +#include "Units.h" // for CSSPoint, CSSRect, etc +#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2 +#include "mozilla/Attributes.h" // for MOZ_CAN_RUN_SCRIPT +#include "mozilla/DefineEnum.h" // for MOZ_DEFINE_ENUM +#include "mozilla/EventForwards.h" // for Modifiers +#include "mozilla/layers/APZThreadUtils.h" +#include "mozilla/layers/MatrixMessage.h" // for MatrixMessage +#include "mozilla/layers/ScrollableLayerGuid.h" // for ScrollableLayerGuid, etc +#include "nsISupportsImpl.h" + +namespace mozilla { + +class Runnable; + +namespace layers { + +struct RepaintRequest; + +class GeckoContentController { + public: + using APZStateChange = GeckoContentController_APZStateChange; + using TapType = GeckoContentController_TapType; + NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GeckoContentController) + + /** + * Notifies the content side of the most recently computed transforms for + * each layers subtree to the root. The nsTArray will contain one + * MatrixMessage for each layers id in the current APZ tree, along with the + * corresponding transform. + */ + virtual void NotifyLayerTransforms(nsTArray<MatrixMessage>&& aTransforms) = 0; + + /** + * Requests a paint of the given RepaintRequest |aRequest| from Gecko. + * Implementations per-platform are responsible for actually handling this. + * + * This method must always be called on the repaint thread, which depends + * on the GeckoContentController. For ChromeProcessController it is the + * Gecko main thread, while for RemoteContentController it is the compositor + * thread where it can send IPDL messages. + */ + virtual void RequestContentRepaint(const RepaintRequest& aRequest) = 0; + + /** + * Requests handling of a tap event. |aPoint| is in LD pixels, relative to the + * current scroll offset. + */ + MOZ_CAN_RUN_SCRIPT + virtual void HandleTap(TapType aType, const LayoutDevicePoint& aPoint, + Modifiers aModifiers, const ScrollableLayerGuid& aGuid, + uint64_t aInputBlockId) = 0; + + /** + * When the apz.allow_zooming pref is set to false, the APZ will not + * translate pinch gestures to actual zooming. Instead, it will call this + * method to notify gecko of the pinch gesture, and allow it to deal with it + * however it wishes. Note that this function is not called if the pinch is + * prevented by content calling preventDefault() on the touch events, or via + * use of the touch-action property. + * @param aType One of PINCHGESTURE_START, PINCHGESTURE_SCALE, + * PINCHGESTURE_FINGERLIFTED, or PINCHGESTURE_END, indicating the phase + * of the pinch. + * @param aGuid The guid of the APZ that is detecting the pinch. This is + * generally the root APZC for the layers id. + * @param aFocusPoint The focus point of the pinch event. + * @param aSpanChange For the START or END event, this is always 0. + * For a SCALE event, this is the difference in span between the + * previous state and the new state. + * @param aModifiers The keyboard modifiers depressed during the pinch. + */ + virtual void NotifyPinchGesture(PinchGestureInput::PinchGestureType aType, + const ScrollableLayerGuid& aGuid, + const LayoutDevicePoint& aFocusPoint, + LayoutDeviceCoord aSpanChange, + Modifiers aModifiers) = 0; + + /** + * Schedules a runnable to run on the controller thread at some time + * in the future. + * This method must always be called on the controller thread. + */ + virtual void PostDelayedTask(already_AddRefed<Runnable> aRunnable, + int aDelayMs) { + APZThreadUtils::DelayedDispatch(std::move(aRunnable), aDelayMs); + } + + /** + * Returns true if we are currently on the thread that can send repaint + * requests. + */ + virtual bool IsRepaintThread() = 0; + + /** + * Runs the given task on the "repaint" thread. + */ + virtual void DispatchToRepaintThread(already_AddRefed<Runnable> aTask) = 0; + + /** + * General notices of APZ state changes for consumers. + * |aGuid| identifies the APZC originating the state change. + * |aChange| identifies the type of state change + * |aArg| is used by some state changes to pass extra information (see + * the documentation for each state change above) + * |aInputBlockId| is populated for the |eStartTouch| and |eEndTouch| + * state changes and identifies the input block of the + * gesture that triggers the state change. + */ + virtual void NotifyAPZStateChange(const ScrollableLayerGuid& aGuid, + APZStateChange aChange, int aArg = 0, + Maybe<uint64_t> aInputBlockId = Nothing()) { + } + + /** + * Notify content of a MozMouseScrollFailed event. + */ + virtual void NotifyMozMouseScrollEvent( + const ScrollableLayerGuid::ViewID& aScrollId, const nsString& aEvent) {} + + /** + * Notify content that the repaint requests have been flushed. + */ + virtual void NotifyFlushComplete() = 0; + + /** + * If the async scrollbar-drag initiation code kicks in on the APZ side, then + * we need to let content know that we are dragging the scrollbar. Otherwise, + * by the time the mousedown events is handled by content, the scrollthumb + * could already have been moved via a RequestContentRepaint message at a + * new scroll position, and the mousedown might end up triggering a click-to- + * scroll on where the thumb used to be. + */ + virtual void NotifyAsyncScrollbarDragInitiated( + uint64_t aDragBlockId, const ScrollableLayerGuid::ViewID& aScrollId, + ScrollDirection aDirection) = 0; + virtual void NotifyAsyncScrollbarDragRejected( + const ScrollableLayerGuid::ViewID& aScrollId) = 0; + + virtual void NotifyAsyncAutoscrollRejected( + const ScrollableLayerGuid::ViewID& aScrollId) = 0; + + virtual void CancelAutoscroll(const ScrollableLayerGuid& aGuid) = 0; + + virtual void NotifyScaleGestureComplete(const ScrollableLayerGuid& aGuid, + float aScale) = 0; + + virtual void UpdateOverscrollVelocity(const ScrollableLayerGuid& aGuid, + float aX, float aY, + bool aIsRootContent) {} + virtual void UpdateOverscrollOffset(const ScrollableLayerGuid& aGuid, + float aX, float aY, bool aIsRootContent) { + } + + GeckoContentController() = default; + + /** + * Needs to be called on the main thread. + */ + virtual void Destroy() {} + + /** + * Whether this is RemoteContentController. + */ + virtual bool IsRemote() { return false; } + + virtual PresShell* GetTopLevelPresShell() const { return nullptr; }; + + protected: + // Protected destructor, to discourage deletion outside of Release(): + virtual ~GeckoContentController() = default; +}; + +} // namespace layers +} // namespace mozilla + +#endif // mozilla_layers_GeckoContentController_h |