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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/common/input/synthetic_pointer_action.h"
#include "base/check_op.h"
#include "ui/latency/latency_info.h"
namespace content {
SyntheticPointerAction::SyntheticPointerAction(
const SyntheticPointerActionListParams& params)
: SyntheticGestureBase(params) {
CHECK_EQ(SyntheticGestureParams::POINTER_ACTION_LIST,
params.GetGestureType());
}
SyntheticPointerAction::~SyntheticPointerAction() {}
SyntheticGesture::Result SyntheticPointerAction::ForwardInputEvents(
const base::TimeTicks& timestamp,
SyntheticGestureTarget* target) {
CHECK(dispatching_controller_);
// Keep this on the stack so we can check if the forwarded event caused the
// deletion of the controller (which owns `this`).
base::WeakPtr<SyntheticGestureController> weak_controller =
dispatching_controller_;
if (state_ == GestureState::UNINITIALIZED) {
gesture_source_type_ = params().gesture_source_type;
if (gesture_source_type_ ==
content::mojom::GestureSourceType::kDefaultInput)
gesture_source_type_ = target->GetDefaultSyntheticGestureSourceType();
if (!external_synthetic_pointer_driver_) {
DCHECK(!internal_synthetic_pointer_driver_);
internal_synthetic_pointer_driver_ = SyntheticPointerDriver::Create(
gesture_source_type_, params().from_devtools_debugger);
}
state_ = GestureState::RUNNING;
}
DCHECK_NE(gesture_source_type_,
content::mojom::GestureSourceType::kDefaultInput);
if (gesture_source_type_ == content::mojom::GestureSourceType::kDefaultInput)
return SyntheticGesture::GESTURE_SOURCE_TYPE_NOT_IMPLEMENTED;
GestureState state = ForwardTouchOrMouseInputEvents(timestamp, target);
if (!weak_controller) {
// A pointer gesture can cause the controller (and therefore `this`) to be
// synchronously deleted (e.g. clicking tab-close). Return immediately in
// this case.
return SyntheticGesture::GESTURE_ABORT;
}
state_ = state;
if (state_ == GestureState::INVALID)
return SyntheticGesture::POINTER_ACTION_INPUT_INVALID;
return (state_ == GestureState::DONE) ? SyntheticGesture::GESTURE_FINISHED
: SyntheticGesture::GESTURE_RUNNING;
}
bool SyntheticPointerAction::AllowHighFrequencyDispatch() const {
return false;
}
void SyntheticPointerAction::WaitForTargetAck(
base::OnceClosure callback,
SyntheticGestureTarget* target) const {
target->WaitForTargetAck(params().GetGestureType(), gesture_source_type_,
std::move(callback));
}
SyntheticPointerAction::GestureState
SyntheticPointerAction::ForwardTouchOrMouseInputEvents(
const base::TimeTicks& timestamp,
SyntheticGestureTarget* target) {
if (!params().params.size()) {
return GestureState::DONE;
}
// An external pointer driver could be destroyed while the gesture is running.
if (!PointerDriver()) {
return GestureState::DONE;
}
DCHECK_LT(num_actions_dispatched_, params().params.size());
SyntheticPointerActionListParams::ParamList& param_list =
params().params[num_actions_dispatched_];
// CAUTION: Forwarding a pointer input can cause `this` to be deleted.
// Keep this on the stack so we can check if the forwarded event caused the
// deletion of the controller (which owns `this`).
base::WeakPtr<SyntheticGestureController> weak_controller =
dispatching_controller_;
for (const SyntheticPointerActionParams& param : param_list) {
if (!PointerDriver()->UserInputCheck(param)) {
return GestureState::INVALID;
}
switch (param.pointer_action_type()) {
case SyntheticPointerActionParams::PointerActionType::PRESS:
PointerDriver()->Press(param.position().x(), param.position().y(),
param.pointer_id(), param.button(),
param.key_modifiers(), param.width(),
param.height(), param.rotation_angle(),
param.force(), param.tangential_pressure(),
param.tilt_x(), param.tilt_y(), timestamp);
break;
case SyntheticPointerActionParams::PointerActionType::MOVE:
PointerDriver()->Move(
param.position().x(), param.position().y(), param.pointer_id(),
param.key_modifiers(), param.width(), param.height(),
param.rotation_angle(), param.force(), param.tangential_pressure(),
param.tilt_x(), param.tilt_y(), param.button());
break;
case SyntheticPointerActionParams::PointerActionType::RELEASE:
PointerDriver()->Release(param.pointer_id(), param.button(),
param.key_modifiers());
break;
case SyntheticPointerActionParams::PointerActionType::CANCEL:
PointerDriver()->Cancel(param.pointer_id());
break;
case SyntheticPointerActionParams::PointerActionType::LEAVE:
PointerDriver()->Leave(param.pointer_id());
break;
case SyntheticPointerActionParams::PointerActionType::IDLE:
break;
case SyntheticPointerActionParams::PointerActionType::NOT_INITIALIZED:
return GestureState::INVALID;
}
base::TimeTicks dispatch_timestamp =
param.timestamp().is_null() ? timestamp : param.timestamp();
PointerDriver()->DispatchEvent(target, dispatch_timestamp);
if (!weak_controller) {
// Return value is unused because the caller returns immediately in this
// condition as well.
return GestureState::DONE;
}
}
num_actions_dispatched_++;
if (num_actions_dispatched_ == params().params.size()) {
return GestureState::DONE;
} else {
return GestureState::RUNNING;
}
}
SyntheticPointerDriver* SyntheticPointerAction::PointerDriver() const {
DCHECK(!internal_synthetic_pointer_driver_ ||
!external_synthetic_pointer_driver_);
if (internal_synthetic_pointer_driver_) {
return internal_synthetic_pointer_driver_.get();
}
return external_synthetic_pointer_driver_.get();
}
} // namespace content
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