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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/input/input_device_manager_desktop.h"
#include <cmath>
#include <string>
#include "cobalt/base/token.h"
#include "cobalt/base/tokens.h"
#include "cobalt/dom/keyboard_event.h"
#include "cobalt/dom/keyboard_event_init.h"
#include "cobalt/dom/pointer_event.h"
#include "cobalt/dom/pointer_event_init.h"
#include "cobalt/dom/wheel_event.h"
#include "cobalt/dom/wheel_event_init.h"
#include "cobalt/input/create_default_camera_3d.h"
#include "cobalt/input/input_poller_impl.h"
#include "cobalt/system_window/input_event.h"
namespace cobalt {
namespace input {
InputDeviceManagerDesktop::InputDeviceManagerDesktop(
const KeyboardEventCallback& keyboard_event_callback,
const PointerEventCallback& pointer_event_callback,
const WheelEventCallback& wheel_event_callback,
system_window::SystemWindow* system_window)
: system_window_(system_window),
input_event_callback_(
base::Bind(&InputDeviceManagerDesktop::HandleInputEvent,
base::Unretained(this))),
keypress_generator_filter_(keyboard_event_callback),
pointer_event_callback_(pointer_event_callback),
wheel_event_callback_(wheel_event_callback) {
input_poller_ = new InputPollerImpl();
DCHECK(system_window_);
camera_3d_ =
CreatedDefaultCamera3D(system_window->GetSbWindow(), input_poller_);
if (system_window_) {
// Add this object's keyboard event callback to the system window.
system_window_->event_dispatcher()->AddEventCallback(
system_window::InputEvent::TypeId(), input_event_callback_);
}
}
InputDeviceManagerDesktop::~InputDeviceManagerDesktop() {
// If we have an associated system window, remove our callback from it.
if (system_window_) {
system_window_->event_dispatcher()->RemoveEventCallback(
system_window::InputEvent::TypeId(), input_event_callback_);
}
}
namespace {
COMPILE_ASSERT(static_cast<uint32_t>(kSbKeyModifiersNone) ==
system_window::InputEvent::kNoModifier &&
static_cast<uint32_t>(kSbKeyModifiersAlt) ==
system_window::InputEvent::kAltKey &&
static_cast<uint32_t>(kSbKeyModifiersCtrl) ==
system_window::InputEvent::kCtrlKey &&
static_cast<uint32_t>(kSbKeyModifiersMeta) ==
system_window::InputEvent::kMetaKey &&
static_cast<uint32_t>(kSbKeyModifiersShift) ==
system_window::InputEvent::kShiftKey,
Mismatched_modifier_enums);
#if SB_API_VERSION >= SB_POINTER_INPUT_API_VERSION
COMPILE_ASSERT(static_cast<uint32_t>(kSbKeyModifiersPointerButtonLeft) ==
system_window::InputEvent::kLeftButton &&
static_cast<uint32_t>(kSbKeyModifiersPointerButtonRight) ==
system_window::InputEvent::kRightButton &&
static_cast<uint32_t>(kSbKeyModifiersPointerButtonMiddle) ==
system_window::InputEvent::kMiddleButton &&
static_cast<uint32_t>(kSbKeyModifiersPointerButtonBack) ==
system_window::InputEvent::kBackButton &&
static_cast<uint32_t>(kSbKeyModifiersPointerButtonForward) ==
system_window::InputEvent::kForwardButton,
Mismatched_modifier_enums);
#endif
void UpdateEventModifierInit(const system_window::InputEvent* input_event,
EventModifierInit* event) {
const uint32 modifiers = input_event->modifiers();
event->set_ctrl_key(modifiers & system_window::InputEvent::kCtrlKey);
event->set_shift_key(modifiers & system_window::InputEvent::kShiftKey);
event->set_alt_key(modifiers & system_window::InputEvent::kAltKey);
event->set_meta_key(modifiers & system_window::InputEvent::kMetaKey);
}
void UpdateMouseEventInitButton(int key_code, MouseEventInit* event) {
// The value of the button attribute MUST be as follows:
// https://www.w3.org/TR/uievents/#ref-for-dom-mouseevent-button-1
if (key_code == kSbKeyMouse1) {
// 0 MUST indicate the primary button of the device (in general, the left
// button or the only button on single-button devices, used to activate a
// user interface control or select text) or the un-initialized value.
event->set_button(0);
} else if (key_code == kSbKeyMouse2) {
// 1 MUST indicate the auxiliary button (in general, the middle button,
// often combined with a mouse wheel).
event->set_button(1);
} else if (key_code == kSbKeyMouse3) {
// 2 MUST indicate the secondary button (in general, the right button, often
// used to display a context menu).
event->set_button(2);
}
}
void UpdateMouseEventInitButtons(uint32 modifiers, MouseEventInit* event) {
// The value of the buttons attribute MUST be as follows:
// https://www.w3.org/TR/uievents/#ref-for-dom-mouseevent-buttons-3
// 0 MUST indicate no button is currently active.
uint16 buttons = 0;
if (modifiers & system_window::InputEvent::kLeftButton) {
// 1 MUST indicate the primary button of the device (in general, the left
// button or the only button on single-button devices, used to activate a
// user interface control or select text).
buttons |= 1;
}
if (modifiers & system_window::InputEvent::kRightButton) {
// 2 MUST indicate the secondary button (in general, the right button, often
// used to display a context menu), if present.
buttons |= 2;
}
if (modifiers & system_window::InputEvent::kMiddleButton) {
// 4 MUST indicate the auxiliary button (in general, the middle button,
// often combined with a mouse wheel).
buttons |= 4;
}
event->set_buttons(buttons);
}
void UpdateMouseEventInit(const system_window::InputEvent* input_event,
dom::MouseEventInit* mouse_event) {
UpdateEventModifierInit(input_event, mouse_event);
UpdateMouseEventInitButton(input_event->key_code(), mouse_event);
UpdateMouseEventInitButtons(input_event->modifiers(), mouse_event);
mouse_event->set_screen_x(static_cast<float>(input_event->position().x()));
mouse_event->set_screen_y(static_cast<float>(input_event->position().y()));
mouse_event->set_client_x(static_cast<float>(input_event->position().x()));
mouse_event->set_client_y(static_cast<float>(input_event->position().y()));
}
// Returns the value or the default_value when value is NaN.
float value_or(float value, float default_value) {
return std::isnan(value) ? default_value : value;
}
} // namespace
void InputDeviceManagerDesktop::HandleKeyboardEvent(
bool is_key_down, const system_window::InputEvent* input_event,
int key_code) {
base::Token type =
is_key_down ? base::Tokens::keydown() : base::Tokens::keyup();
dom::KeyboardEvent::KeyLocationCode location =
dom::KeyboardEvent::KeyCodeToKeyLocation(key_code);
dom::KeyboardEventInit keyboard_event;
UpdateEventModifierInit(input_event, &keyboard_event);
keyboard_event.set_location(location);
keyboard_event.set_repeat(input_event->is_repeat());
keyboard_event.set_char_code(key_code);
keyboard_event.set_key_code(key_code);
keypress_generator_filter_.HandleKeyboardEvent(type, keyboard_event);
}
void InputDeviceManagerDesktop::HandlePointerEvent(
base::Token type, const system_window::InputEvent* input_event) {
dom::PointerEventInit pointer_event;
UpdateMouseEventInit(input_event, &pointer_event);
pointer_event.set_pointer_id(input_event->device_id());
#if SB_API_VERSION >= SB_POINTER_INPUT_API_VERSION
pointer_event.set_width(value_or(input_event->size().x(), 0.0f));
pointer_event.set_height(value_or(input_event->size().y(), 0.0f));
pointer_event.set_pressure(value_or(input_event->pressure(),
input_event->modifiers() ? 0.5f : 0.0f));
pointer_event.set_tilt_x(
value_or(static_cast<float>(input_event->tilt().x()), 0.0f));
pointer_event.set_tilt_y(
value_or(static_cast<float>(input_event->tilt().y()), 0.0f));
#endif
pointer_event.set_is_primary(true);
pointer_event_callback_.Run(type, pointer_event);
}
void InputDeviceManagerDesktop::HandleWheelEvent(
const system_window::InputEvent* input_event) {
base::Token type = base::Tokens::wheel();
dom::WheelEventInit wheel_event;
UpdateMouseEventInit(input_event, &wheel_event);
wheel_event.set_delta_x(input_event->delta().x());
wheel_event.set_delta_y(input_event->delta().y());
wheel_event.set_delta_z(0);
wheel_event.set_delta_mode(dom::WheelEvent::kDomDeltaLine);
wheel_event_callback_.Run(type, wheel_event);
}
void InputDeviceManagerDesktop::HandleInputEvent(const base::Event* event) {
// The user has pressed a key on the keyboard.
const system_window::InputEvent* input_event =
base::polymorphic_downcast<const system_window::InputEvent*>(event);
SB_DCHECK(input_event);
int key_code = input_event->key_code();
switch (input_event->type()) {
case system_window::InputEvent::kKeyDown:
HandleKeyboardEvent(true, input_event, key_code);
break;
case system_window::InputEvent::kKeyUp:
HandleKeyboardEvent(false, input_event, key_code);
break;
case system_window::InputEvent::kPointerDown:
case system_window::InputEvent::kPointerUp: {
if ((kSbKeyBrowserBack == key_code) ||
(kSbKeyBrowserForward == key_code) || (kSbKeyMouse2 == key_code)) {
// For consistency with behavior on current browsers, the 'Forward' and
// 'Back' mouse buttons are reported as keypress input for the 'Forward'
// and 'Back' navigation keys, not as Pointer Events for the X1 and X2
// buttons.
if (kSbKeyMouse2 == key_code) {
// Temporarily Report middle button presses as the enter key.
key_code = kSbKeyReturn;
}
HandleKeyboardEvent(
input_event->type() == system_window::InputEvent::kPointerDown,
input_event, key_code);
} else {
base::Token type =
input_event->type() == system_window::InputEvent::kPointerDown
? base::Tokens::pointerdown()
: base::Tokens::pointerup();
HandlePointerEvent(type, input_event);
}
break;
}
case system_window::InputEvent::kPointerMove: {
HandlePointerEvent(base::Tokens::pointermove(), input_event);
break;
}
case system_window::InputEvent::kWheel: {
HandleWheelEvent(input_event);
}
default:
break;
}
InputPollerImpl* input_poller_impl =
static_cast<InputPollerImpl*>(input_poller_.get());
input_poller_impl->UpdateInputEvent(input_event);
}
} // namespace input
} // namespace cobalt