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/* -*- 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_IAPZCTreeManager_h
#define mozilla_layers_IAPZCTreeManager_h
#include <stdint.h> // for uint64_t, uint32_t
#include "mozilla/layers/LayersTypes.h" // for TouchBehaviorFlags
#include "mozilla/layers/ScrollableLayerGuid.h" // for ScrollableLayerGuid, etc
#include "mozilla/layers/ZoomConstraints.h" // for ZoomConstraints
#include "nsTArrayForwardDeclare.h" // for nsTArray, nsTArray_Impl, etc
#include "nsISupportsImpl.h" // for MOZ_COUNT_CTOR, etc
#include "Units.h" // for CSSRect, etc
namespace mozilla {
namespace layers {
class APZInputBridge;
class KeyboardMap;
struct ZoomTarget;
enum AllowedTouchBehavior {
NONE = 0,
VERTICAL_PAN = 1 << 0,
HORIZONTAL_PAN = 1 << 1,
PINCH_ZOOM = 1 << 2,
ANIMATING_ZOOM = 1 << 3,
UNKNOWN = 1 << 4
};
enum ZoomToRectBehavior : uint32_t {
DEFAULT_BEHAVIOR = 0,
DISABLE_ZOOM_OUT = 1 << 0,
PAN_INTO_VIEW_ONLY = 1 << 1,
ONLY_ZOOM_TO_DEFAULT_SCALE = 1 << 2,
ZOOM_TO_FOCUSED_INPUT = 1 << 3,
};
enum class BrowserGestureResponse : bool;
class AsyncDragMetrics;
struct APZHandledResult;
class IAPZCTreeManager {
NS_INLINE_DECL_THREADSAFE_VIRTUAL_REFCOUNTING(IAPZCTreeManager)
public:
/**
* Set the keyboard shortcuts to use for translating keyboard events.
*/
virtual void SetKeyboardMap(const KeyboardMap& aKeyboardMap) = 0;
/**
* Kicks an animation to zoom to a rect. This may be either a zoom out or zoom
* in. The actual animation is done on the sampler thread after being set
* up. |aRect| must be given in CSS pixels, relative to the document.
* |aFlags| is a combination of the ZoomToRectBehavior enum values.
*/
virtual void ZoomToRect(const ScrollableLayerGuid& aGuid,
const ZoomTarget& aZoomTarget,
const uint32_t aFlags = DEFAULT_BEHAVIOR) = 0;
/**
* If we have touch listeners, this should always be called when we know
* definitively whether or not content has preventDefaulted any touch events
* that have come in. If |aPreventDefault| is true, any touch events in the
* queue will be discarded. This function must be called on the controller
* thread.
*/
virtual void ContentReceivedInputBlock(uint64_t aInputBlockId,
bool aPreventDefault) = 0;
/**
* When the event regions code is enabled, this function should be invoked to
* to confirm the target of the input block. This is only needed in cases
* where the initial input event of the block hit a dispatch-to-content region
* but is safe to call for all input blocks. This function should always be
* invoked on the controller thread.
* The different elements in the array of targets correspond to the targets
* for the different touch points. In the case where the touch point has no
* target, or the target is not a scrollable frame, the target's |mScrollId|
* should be set to ScrollableLayerGuid::NULL_SCROLL_ID.
*/
virtual void SetTargetAPZC(uint64_t aInputBlockId,
const nsTArray<ScrollableLayerGuid>& aTargets) = 0;
/**
* Updates any zoom constraints contained in the <meta name="viewport"> tag.
* If the |aConstraints| is Nothing() then previously-provided constraints for
* the given |aGuid| are cleared.
*/
virtual void UpdateZoomConstraints(
const ScrollableLayerGuid& aGuid,
const Maybe<ZoomConstraints>& aConstraints) = 0;
virtual void SetDPI(float aDpiValue) = 0;
/**
* Sets allowed touch behavior values for current touch-session for specific
* input block (determined by aInputBlock).
* Should be invoked by the widget. Each value of the aValues arrays
* corresponds to the different touch point that is currently active.
* Must be called after receiving the TOUCH_START event that starts the
* touch-session.
* This must be called on the controller thread.
*/
virtual void SetAllowedTouchBehavior(
uint64_t aInputBlockId, const nsTArray<TouchBehaviorFlags>& aValues) = 0;
virtual void SetBrowserGestureResponse(uint64_t aInputBlockId,
BrowserGestureResponse aResponse) = 0;
virtual void StartScrollbarDrag(const ScrollableLayerGuid& aGuid,
const AsyncDragMetrics& aDragMetrics) = 0;
virtual bool StartAutoscroll(const ScrollableLayerGuid& aGuid,
const ScreenPoint& aAnchorLocation) = 0;
virtual void StopAutoscroll(const ScrollableLayerGuid& aGuid) = 0;
/**
* Function used to disable LongTap gestures.
*
* On slow running tests, drags and touch events can be misinterpreted
* as a long tap. This allows tests to disable long tap gesture detection.
*/
virtual void SetLongTapEnabled(bool aTapGestureEnabled) = 0;
/**
* Returns an APZInputBridge interface that can be used to send input
* events to APZ in a synchronous manner. This will always be non-null, and
* the returned object's lifetime will match the lifetime of this
* IAPZCTreeManager implementation.
* It is only valid to call this function in the UI process.
*/
virtual APZInputBridge* InputBridge() = 0;
protected:
// Discourage destruction outside of decref
virtual ~IAPZCTreeManager() = default;
};
} // namespace layers
} // namespace mozilla
#endif // mozilla_layers_IAPZCTreeManager_h
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