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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// 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/touch_smooth_scroll_gesture_aura.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "ui/aura/root_window.h"
#include "ui/base/events/event.h"
#include "ui/base/events/event_utils.h"
#include "ui/gfx/transform.h"
namespace {
void InjectTouchEvent(const gfx::Point& location,
ui::EventType type,
aura::Window* window) {
gfx::Point screen_location = location;
// First convert the location from Window to RootWindow.
aura::RootWindow* root_window = window->GetRootWindow();
aura::Window::ConvertPointToTarget(window, root_window, &screen_location);
// Then convert the location from RootWindow to screen.
root_window->ConvertPointToHost(&screen_location);
ui::TouchEvent touch(type, screen_location, 0, 0, ui::EventTimeForNow(),
1.0f, 1.0f, 1.0f, 1.0f);
aura::RootWindowHostDelegate* root_window_host_delegate =
root_window->AsRootWindowHostDelegate();
root_window_host_delegate->OnHostTouchEvent(&touch);
}
} // namespace
namespace content {
TouchSmoothScrollGestureAura::TouchSmoothScrollGestureAura(bool scroll_down,
int pixels_to_scroll,
int mouse_event_x,
int mouse_event_y,
aura::Window* window)
: scroll_down_(scroll_down),
pixels_to_scroll_(pixels_to_scroll),
pixels_scrolled_(0),
location_(mouse_event_x, mouse_event_y),
window_(window) {
}
TouchSmoothScrollGestureAura::~TouchSmoothScrollGestureAura() {}
bool TouchSmoothScrollGestureAura::ForwardInputEvents(
base::TimeTicks now,
RenderWidgetHost* host) {
if (pixels_scrolled_ >= pixels_to_scroll_)
return false;
RenderWidgetHostImpl* host_impl = RenderWidgetHostImpl::From(host);
float position_delta = synthetic_gesture_calculator_.GetDelta(now,
host_impl->GetSyntheticGestureMessageInterval());
if (pixels_scrolled_ == 0) {
InjectTouchEvent(location_, ui::ET_TOUCH_PRESSED, window_);
}
location_.Offset(0, scroll_down_ ? -position_delta : position_delta);
InjectTouchEvent(location_, ui::ET_TOUCH_MOVED, window_);
pixels_scrolled_ += abs(position_delta);
if (pixels_scrolled_ >= pixels_to_scroll_) {
InjectTouchEvent(location_, ui::ET_TOUCH_RELEASED, window_);
}
return true;
}
} // namespace content
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