It is time.

ui/views/view_targeter_delegate.cc

-// Copyright 2014 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 "ui/views/view_targeter_delegate.h"
-
-#include "ui/gfx/rect_conversions.h"
-#include "ui/views/rect_based_targeting_utils.h"
-#include "ui/views/view.h"
-
-namespace {
-
-// The minimum percentage of a view's area that needs to be covered by a rect
-// representing a touch region in order for that view to be considered by the
-// rect-based targeting algorithm.
-static const float kRectTargetOverlap = 0.6f;
-
-}  // namespace
-
-namespace views {
-
-// TODO(tdanderson): Move the contents of rect_based_targeting_utils.(h|cc)
-//                   into here.
-
-bool ViewTargeterDelegate::DoesIntersectRect(const View* target,
-                                             const gfx::Rect& rect) const {
-  return target->GetLocalBounds().Intersects(rect);
-}
-
-View* ViewTargeterDelegate::TargetForRect(View* root, const gfx::Rect& rect) {
-  // |rect_view| represents the current best candidate to return
-  // if rect-based targeting (i.e., fuzzing) is used.
-  // |rect_view_distance| is used to keep track of the distance
-  // between the center point of |rect_view| and the center
-  // point of |rect|.
-  View* rect_view = NULL;
-  int rect_view_distance = INT_MAX;
-
-  // |point_view| represents the view that would have been returned
-  // from this function call if point-based targeting were used.
-  View* point_view = NULL;
-
-  for (int i = root->child_count() - 1; i >= 0; --i) {
-    View* child = root->child_at(i);
-
-    if (!child->CanProcessEventsWithinSubtree())
-      continue;
-
-    // Ignore any children which are invisible or do not intersect |rect|.
-    if (!child->visible())
-      continue;
-    gfx::RectF rect_in_child_coords_f(rect);
-    View::ConvertRectToTarget(root, child, &rect_in_child_coords_f);
-    gfx::Rect rect_in_child_coords = gfx::ToEnclosingRect(
-        rect_in_child_coords_f);
-    if (!child->HitTestRect(rect_in_child_coords))
-      continue;
-
-    View* cur_view = child->GetEventHandlerForRect(rect_in_child_coords);
-
-    if (views::UsePointBasedTargeting(rect))
-      return cur_view;
-
-    gfx::RectF cur_view_bounds_f(cur_view->GetLocalBounds());
-    View::ConvertRectToTarget(cur_view, root, &cur_view_bounds_f);
-    gfx::Rect cur_view_bounds = gfx::ToEnclosingRect(
-        cur_view_bounds_f);
-    if (views::PercentCoveredBy(cur_view_bounds, rect) >= kRectTargetOverlap) {
-      // |cur_view| is a suitable candidate for rect-based targeting.
-      // Check to see if it is the closest suitable candidate so far.
-      gfx::Point touch_center(rect.CenterPoint());
-      int cur_dist = views::DistanceSquaredFromCenterToPoint(touch_center,
-                                                             cur_view_bounds);
-      if (!rect_view || cur_dist < rect_view_distance) {
-        rect_view = cur_view;
-        rect_view_distance = cur_dist;
-      }
-    } else if (!rect_view && !point_view) {
-      // Rect-based targeting has not yielded any candidates so far. Check
-      // if point-based targeting would have selected |cur_view|.
-      gfx::Point point_in_child_coords(rect_in_child_coords.CenterPoint());
-      if (child->HitTestPoint(point_in_child_coords))
-        point_view = child->GetEventHandlerForPoint(point_in_child_coords);
-    }
-  }
-
-  if (views::UsePointBasedTargeting(rect) || (!rect_view && !point_view))
-    return root;
-
-  // If |root| is a suitable candidate for rect-based targeting, check to
-  // see if it is closer than the current best suitable candidate so far.
-  gfx::Rect local_bounds(root->GetLocalBounds());
-  if (views::PercentCoveredBy(local_bounds, rect) >= kRectTargetOverlap) {
-    gfx::Point touch_center(rect.CenterPoint());
-    int cur_dist = views::DistanceSquaredFromCenterToPoint(touch_center,
-                                                           local_bounds);
-    if (!rect_view || cur_dist < rect_view_distance)
-      rect_view = root;
-  }
-
-  return rect_view ? rect_view : point_view;
-}
-
-}  // namespace views