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123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "ui/events/event_target.h"
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#include <algorithm>
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#include "base/logging.h"
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#include "ui/events/event.h"
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namespace ui {
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EventTarget::EventTarget()
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: target_handler_(NULL) {
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}
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EventTarget::~EventTarget() {
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}
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void EventTarget::ConvertEventToTarget(EventTarget* target,
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LocatedEvent* event) {
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}
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void EventTarget::AddPreTargetHandler(EventHandler* handler) {
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pre_target_list_.push_back(handler);
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}
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void EventTarget::PrependPreTargetHandler(EventHandler* handler) {
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pre_target_list_.insert(pre_target_list_.begin(), handler);
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}
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void EventTarget::RemovePreTargetHandler(EventHandler* handler) {
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EventHandlerList::iterator find =
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std::find(pre_target_list_.begin(),
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pre_target_list_.end(),
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handler);
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if (find != pre_target_list_.end())
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pre_target_list_.erase(find);
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}
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void EventTarget::AddPostTargetHandler(EventHandler* handler) {
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post_target_list_.push_back(handler);
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}
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void EventTarget::RemovePostTargetHandler(EventHandler* handler) {
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EventHandlerList::iterator find =
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std::find(post_target_list_.begin(),
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post_target_list_.end(),
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handler);
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if (find != post_target_list_.end())
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post_target_list_.erase(find);
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}
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bool EventTarget::IsPreTargetListEmpty() const {
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return pre_target_list_.empty();
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}
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void EventTarget::OnEvent(Event* event) {
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CHECK_EQ(this, event->target());
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if (target_handler_)
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target_handler_->OnEvent(event);
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else
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EventHandler::OnEvent(event);
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}
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void EventTarget::OnKeyEvent(KeyEvent* event) {
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CHECK_EQ(this, event->target());
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if (target_handler_)
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target_handler_->OnKeyEvent(event);
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}
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void EventTarget::OnMouseEvent(MouseEvent* event) {
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CHECK_EQ(this, event->target());
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if (target_handler_)
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target_handler_->OnMouseEvent(event);
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}
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void EventTarget::OnScrollEvent(ScrollEvent* event) {
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CHECK_EQ(this, event->target());
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if (target_handler_)
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target_handler_->OnScrollEvent(event);
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}
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void EventTarget::OnTouchEvent(TouchEvent* event) {
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CHECK_EQ(this, event->target());
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if (target_handler_)
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target_handler_->OnTouchEvent(event);
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}
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void EventTarget::OnGestureEvent(GestureEvent* event) {
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CHECK_EQ(this, event->target());
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if (target_handler_)
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target_handler_->OnGestureEvent(event);
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}
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void EventTarget::GetPreTargetHandlers(EventHandlerList* list) {
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EventTarget* target = this;
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while (target) {
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EventHandlerList::reverse_iterator it, rend;
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for (it = target->pre_target_list_.rbegin(),
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rend = target->pre_target_list_.rend();
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it != rend;
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++it) {
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list->insert(list->begin(), *it);
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}
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target = target->GetParentTarget();
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}
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}
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void EventTarget::GetPostTargetHandlers(EventHandlerList* list) {
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EventTarget* target = this;
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while (target) {
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for (EventHandlerList::iterator it = target->post_target_list_.begin(),
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end = target->post_target_list_.end(); it != end; ++it) {
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list->push_back(*it);
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}
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target = target->GetParentTarget();
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}
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}
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} // namespace ui
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