11320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// Copyright 2014 The Chromium Authors. All rights reserved. 21320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// Use of this source code is governed by a BSD-style license that can be 31320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// found in the LICENSE file. 41320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 51320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "ui/views/widget/root_view_targeter.h" 61320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 71320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "ui/views/view.h" 81320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "ui/views/view_targeter_delegate.h" 91320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "ui/views/views_switches.h" 101320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "ui/views/widget/root_view.h" 111320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "ui/views/widget/widget.h" 121320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 131320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tuccinamespace views { 141320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 151320f92c476a1ad9d19dba2a48c72b75566198e9Primiano TucciRootViewTargeter::RootViewTargeter(ViewTargeterDelegate* delegate, 161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci internal::RootView* root_view) 171320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci : ViewTargeter(delegate), root_view_(root_view) { 181320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci} 191320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 201320f92c476a1ad9d19dba2a48c72b75566198e9Primiano TucciRootViewTargeter::~RootViewTargeter() { 211320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci} 221320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 231320f92c476a1ad9d19dba2a48c72b75566198e9Primiano TucciView* RootViewTargeter::FindTargetForGestureEvent( 241320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci View* root, 251320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci const ui::GestureEvent& gesture) { 261320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci CHECK_EQ(root, root_view_); 271320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 281320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // Return the default gesture handler if one is already set. 291320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (root_view_->gesture_handler_) { 301320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci CHECK(root_view_->gesture_handler_set_before_processing_); 311320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return root_view_->gesture_handler_; 321320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 331320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 341320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // If no default gesture handler has already been set, do not perform any 351320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // targeting for a ET_GESTURE_END event. 361320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (gesture.type() == ui::ET_GESTURE_END) 371320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return NULL; 381320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 391320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // If rect-based targeting is enabled, use the gesture's bounding box to 401320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // determine the target. Otherwise use the center point of the gesture's 411320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // bounding box to determine the target. 421320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci gfx::Rect rect(gesture.location(), gfx::Size(1, 1)); 431320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (views::switches::IsRectBasedTargetingEnabled() && 441320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci !gesture.details().bounding_box().IsEmpty()) { 451320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // TODO(tdanderson): Pass in the bounding box to GetEventHandlerForRect() 461320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // once crbug.com/313392 is resolved. 471320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci rect.set_size(gesture.details().bounding_box().size()); 481320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci rect.Offset(-rect.width() / 2, -rect.height() / 2); 491320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 501320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 511320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return root->GetEffectiveViewTargeter()->TargetForRect(root, rect); 521320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci} 531320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 541320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciui::EventTarget* RootViewTargeter::FindNextBestTargetForGestureEvent( 551320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci ui::EventTarget* previous_target, 561320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci const ui::GestureEvent& gesture) { 571320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // ET_GESTURE_END events should only ever be targeted to the default 581320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // gesture handler set by a previous gesture, if one exists. Thus we do not 591320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // permit any re-targeting of ET_GESTURE_END events. 601320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (gesture.type() == ui::ET_GESTURE_END) 611320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return NULL; 621320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 631320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // Prohibit re-targeting of gesture events (except for GESTURE_SCROLL_BEGIN 641320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // events) if the default gesture handler was set by the dispatch of a 651320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // previous gesture event. 661320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (root_view_->gesture_handler_set_before_processing_ && 671320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci gesture.type() != ui::ET_GESTURE_SCROLL_BEGIN) { 681320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return NULL; 691320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 701320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 711320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // If |gesture_handler_| is NULL, it is either because the view was removed 721320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // from the tree by the previous dispatch of |gesture| or because |gesture| is 731320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // the GESTURE_END event corresponding to the removal of the last touch 741320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // point. In either case, no further re-targeting of |gesture| should be 751320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // permitted. 761320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (!root_view_->gesture_handler_) 771320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return NULL; 781320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 791320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return previous_target->GetParentTarget(); 801320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci} 811320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 821320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci} // namespace views 83