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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/browser/renderer_host/direct_manipulation_helper_win.h"
#include <objbase.h>
#include <cmath>
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/win/win_util.h"
#include "ui/base/ui_base_features.h"
#include "ui/base/win/window_event_target.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/compositor_animation_observer.h"
#include "ui/display/win/screen_win.h"
#include "ui/gfx/geometry/rect.h"
namespace content {
// static
std::unique_ptr<DirectManipulationHelper>
DirectManipulationHelper::CreateInstance(HWND window,
ui::Compositor* compositor,
ui::WindowEventTarget* event_target) {
if (!::IsWindow(window) || !compositor || !event_target)
return nullptr;
std::unique_ptr<DirectManipulationHelper> instance =
base::WrapUnique(new DirectManipulationHelper(window, compositor));
if (instance->Initialize(event_target))
return instance;
return nullptr;
}
// static
std::unique_ptr<DirectManipulationHelper>
DirectManipulationHelper::CreateInstanceForTesting(
ui::WindowEventTarget* event_target,
Microsoft::WRL::ComPtr<IDirectManipulationViewport> viewport) {
std::unique_ptr<DirectManipulationHelper> instance =
base::WrapUnique(new DirectManipulationHelper(0, nullptr));
instance->event_handler_ =
Microsoft::WRL::Make<DirectManipulationEventHandler>(event_target);
instance->event_handler_->SetDirectManipulationHelper(instance.get());
instance->viewport_ = viewport;
return instance;
}
DirectManipulationHelper::~DirectManipulationHelper() {
Destroy();
}
DirectManipulationHelper::DirectManipulationHelper(HWND window,
ui::Compositor* compositor)
: window_(window), compositor_(compositor) {}
void DirectManipulationHelper::OnAnimationStep(base::TimeTicks timestamp) {
// Simulate 1 frame in update_manager_.
update_manager_->Update(nullptr);
}
void DirectManipulationHelper::OnCompositingShuttingDown(
ui::Compositor* compositor) {
DCHECK_EQ(compositor, compositor_);
Destroy();
}
bool DirectManipulationHelper::Initialize(ui::WindowEventTarget* event_target) {
// IDirectManipulationUpdateManager is the first COM object created by the
// application to retrieve other objects in the Direct Manipulation API.
// It also serves to activate and deactivate Direct Manipulation functionality
// on a per-HWND basis.
HRESULT hr =
::CoCreateInstance(CLSID_DirectManipulationManager, nullptr,
CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&manager_));
if (!SUCCEEDED(hr))
return false;
// Since we want to use fake viewport, we need UpdateManager to tell a fake
// fake render frame.
hr = manager_->GetUpdateManager(IID_PPV_ARGS(&update_manager_));
if (!SUCCEEDED(hr))
return false;
hr = manager_->CreateViewport(nullptr, window_, IID_PPV_ARGS(&viewport_));
if (!SUCCEEDED(hr))
return false;
DIRECTMANIPULATION_CONFIGURATION configuration =
DIRECTMANIPULATION_CONFIGURATION_INTERACTION |
DIRECTMANIPULATION_CONFIGURATION_TRANSLATION_X |
DIRECTMANIPULATION_CONFIGURATION_TRANSLATION_Y |
DIRECTMANIPULATION_CONFIGURATION_TRANSLATION_INERTIA |
DIRECTMANIPULATION_CONFIGURATION_RAILS_X |
DIRECTMANIPULATION_CONFIGURATION_RAILS_Y |
DIRECTMANIPULATION_CONFIGURATION_SCALING;
hr = viewport_->ActivateConfiguration(configuration);
if (!SUCCEEDED(hr))
return false;
// Since we are using fake viewport and only want to use Direct Manipulation
// for touchpad, we need to use MANUALUPDATE option.
hr = viewport_->SetViewportOptions(
DIRECTMANIPULATION_VIEWPORT_OPTIONS_MANUALUPDATE);
if (!SUCCEEDED(hr))
return false;
event_handler_ =
Microsoft::WRL::Make<DirectManipulationEventHandler>(event_target);
event_handler_->SetDirectManipulationHelper(this);
// We got Direct Manipulation transform from
// IDirectManipulationViewportEventHandler.
hr = viewport_->AddEventHandler(window_, event_handler_.Get(),
&view_port_handler_cookie_);
if (!SUCCEEDED(hr))
return false;
// Set default rect for viewport before activate.
gfx::Size viewport_size_in_pixels = {1000, 1000};
event_handler_->SetViewportSizeInPixels(viewport_size_in_pixels);
RECT rect = gfx::Rect(viewport_size_in_pixels).ToRECT();
hr = viewport_->SetViewportRect(&rect);
if (!SUCCEEDED(hr))
return false;
hr = manager_->Activate(window_);
if (!SUCCEEDED(hr))
return false;
hr = viewport_->Enable();
if (!SUCCEEDED(hr))
return false;
hr = update_manager_->Update(nullptr);
if (!SUCCEEDED(hr))
return false;
return true;
}
void DirectManipulationHelper::SetSizeInPixels(
const gfx::Size& size_in_pixels) {
if (!event_handler_->SetViewportSizeInPixels(size_in_pixels))
return;
HRESULT hr = viewport_->Stop();
if (!SUCCEEDED(hr))
return;
RECT rect = gfx::Rect(size_in_pixels).ToRECT();
hr = viewport_->SetViewportRect(&rect);
}
void DirectManipulationHelper::OnPointerHitTest(WPARAM w_param) {
// Update the device scale factor.
event_handler_->SetDeviceScaleFactor(
display::win::GetScreenWin()->GetScaleFactorForHWND(window_));
// Only DM_POINTERHITTEST can be the first message of input sequence of
// touchpad input.
// TODO(chaopeng) Check if Windows API changes:
// For WM_POINTER, the pointer type will show the event from mouse.
// For WM_POINTERACTIVATE, the pointer id will be different with the following
// message.
UINT32 pointer_id = GET_POINTERID_WPARAM(w_param);
POINTER_INPUT_TYPE pointer_type;
if (::GetPointerType(pointer_id, &pointer_type) &&
pointer_type == PT_TOUCHPAD) {
viewport_->SetContact(pointer_id);
}
}
void DirectManipulationHelper::AddAnimationObserver() {
DCHECK(compositor_);
compositor_->AddAnimationObserver(this);
has_animation_observer_ = true;
}
void DirectManipulationHelper::RemoveAnimationObserver() {
DCHECK(compositor_);
compositor_->RemoveAnimationObserver(this);
has_animation_observer_ = false;
}
void DirectManipulationHelper::SetDeviceScaleFactorForTesting(float factor) {
event_handler_->SetDeviceScaleFactor(factor);
}
void DirectManipulationHelper::Destroy() {
if (!compositor_)
return;
if (has_animation_observer_)
RemoveAnimationObserver();
compositor_ = nullptr;
if (event_handler_)
event_handler_->SetDirectManipulationHelper(nullptr);
if (viewport_) {
viewport_->Stop();
viewport_->RemoveEventHandler(view_port_handler_cookie_);
viewport_->Abandon();
}
if (manager_) {
manager_->Deactivate(window_);
}
}
} // namespace content
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