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// Copyright 2017 The Cobalt Authors. 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/dom/mouse_event.h"
#include <string>
#include "cobalt/base/token.h"
#include "cobalt/dom/html_element.h"
namespace cobalt {
namespace dom {
MouseEvent::MouseEvent(const std::string& type)
: UIEventWithKeyState(base::Token(type), kBubbles, kCancelable, NULL),
screen_x_(0),
screen_y_(0),
client_x_(0),
client_y_(0),
button_(0),
buttons_(0) {}
MouseEvent::MouseEvent(const std::string& type, const MouseEventInit& init_dict)
: UIEventWithKeyState(base::Token(type), kBubbles, kCancelable,
init_dict.view(), init_dict),
screen_x_(static_cast<float>(init_dict.screen_x())),
screen_y_(static_cast<float>(init_dict.screen_y())),
client_x_(static_cast<float>(init_dict.client_x())),
client_y_(static_cast<float>(init_dict.client_y())),
button_(init_dict.button()),
buttons_(init_dict.buttons()),
related_target_(init_dict.related_target()) {}
MouseEvent::MouseEvent(base::Token type, const scoped_refptr<Window>& view,
const MouseEventInit& init_dict)
: UIEventWithKeyState(type, kBubbles, kCancelable, view, init_dict),
screen_x_(static_cast<float>(init_dict.screen_x())),
screen_y_(static_cast<float>(init_dict.screen_y())),
client_x_(static_cast<float>(init_dict.client_x())),
client_y_(static_cast<float>(init_dict.client_y())),
button_(init_dict.button()),
buttons_(init_dict.buttons()),
related_target_(init_dict.related_target()) {}
MouseEvent::MouseEvent(base::Token type, Bubbles bubbles, Cancelable cancelable,
const scoped_refptr<Window>& view,
const MouseEventInit& init_dict)
: UIEventWithKeyState(type, bubbles, cancelable, view, init_dict),
screen_x_(static_cast<float>(init_dict.screen_x())),
screen_y_(static_cast<float>(init_dict.screen_y())),
client_x_(static_cast<float>(init_dict.client_x())),
client_y_(static_cast<float>(init_dict.client_y())),
button_(init_dict.button()),
buttons_(init_dict.buttons()),
related_target_(init_dict.related_target()) {}
MouseEvent::MouseEvent(UninitializedFlag uninitialized_flag)
: UIEventWithKeyState(uninitialized_flag),
screen_x_(0),
screen_y_(0),
client_x_(0),
client_y_(0),
button_(0),
buttons_(0) {}
void MouseEvent::InitMouseEvent(
const std::string& type, bool bubbles, bool cancelable,
const scoped_refptr<Window>& view, int32 detail, int32 screen_x,
int32 screen_y, int32 client_x, int32 client_y, bool ctrl_key, bool alt_key,
bool shift_key, bool meta_key, uint16 button,
const scoped_refptr<EventTarget>& related_target) {
InitUIEventWithKeyState(type, bubbles, cancelable, view, detail, ctrl_key,
alt_key, shift_key, meta_key);
screen_x_ = screen_x;
screen_y_ = screen_y;
client_x_ = client_x;
client_y_ = client_y;
button_ = button;
buttons_ = 0;
related_target_ = related_target;
}
void MouseEvent::InitMouseEvent(
const std::string& type, bool bubbles, bool cancelable,
const scoped_refptr<Window>& view, int32 detail, int32 screen_x,
int32 screen_y, int32 client_x, int32 client_y,
const std::string& modifierslist, uint16 button,
const scoped_refptr<EventTarget>& related_target) {
InitUIEventWithKeyState(type, bubbles, cancelable, view, detail,
modifierslist);
screen_x_ = screen_x;
screen_y_ = screen_y;
client_x_ = client_x;
client_y_ = client_y;
button_ = button;
buttons_ = 0;
related_target_ = related_target;
}
float MouseEvent::page_x() const {
// Algorithm for pageX
// https://www.w3.org/TR/2013/WD-cssom-view-20131217/#dom-mouseevent-pagex
// In Cobalt all steps are equivalent to returning clientX.
return static_cast<float>(client_x());
}
float MouseEvent::page_y() const {
// Algorithm for pageY
// https://www.w3.org/TR/2013/WD-cssom-view-20131217/#dom-mouseevent-pagey
// In Cobalt all steps are equivalent to returning clientY.
return static_cast<float>(client_y());
}
float MouseEvent::offset_x() {
// Algorithm for offsetX
// https://www.w3.org/TR/2013/WD-cssom-view-20131217/#dom-mouseevent-offsetx
// If the event's dispatch flag is set,
if (IsBeingDispatched()) {
// return the x-coordinate of the position where the event occurred relative
// to the origin of the padding edge of the target node, ignoring the
// transforms that apply to the element and its ancestors and terminate
// these steps.
float target_node_padding_edge = 0.0f;
Node* node = base::polymorphic_downcast<Node*>(target().get());
if (node && node->IsElement()) {
scoped_refptr<HTMLElement> html_element =
node->AsElement()->AsHTMLElement();
if (html_element && html_element->layout_boxes()) {
target_node_padding_edge =
html_element->layout_boxes()->GetPaddingEdgeOffset().x();
}
}
return client_x() - target_node_padding_edge;
}
// Return the value of the event's pageX attribute.
return page_x();
}
float MouseEvent::offset_y() const {
// Algorithm for offsetY
// https://www.w3.org/TR/2013/WD-cssom-view-20131217/#dom-mouseevent-offsety
// If the event's dispatch flag is set,
if (IsBeingDispatched()) {
// return the y-coordinate of the position where the event occurred relative
// to the origin of the padding edge of the target node, ignoring the
// transforms that apply to the element and its ancestors, and terminate
// these steps.
float target_node_padding_edge = 0.0f;
Node* node = base::polymorphic_downcast<Node*>(target().get());
if (node && node->IsElement()) {
scoped_refptr<HTMLElement> html_element =
node->AsElement()->AsHTMLElement();
if (html_element && html_element->layout_boxes()) {
target_node_padding_edge =
html_element->layout_boxes()->GetPaddingEdgeOffset().y();
}
}
return client_y() - target_node_padding_edge;
}
// Return the value of the event's pageY attribute.
return page_y();
}
uint32 MouseEvent::which() const { return button_ + 1; }
void MouseEvent::TraceMembers(script::Tracer* tracer) {
UIEventWithKeyState::TraceMembers(tracer);
tracer->Trace(related_target_);
}
} // namespace dom
} // namespace cobalt