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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "ash/frame/frame_border_hit_test_controller.h"
      6 
      7 #include "ash/ash_constants.h"
      8 #include "ash/frame/caption_buttons/frame_caption_button_container_view.h"
      9 #include "ash/wm/resize_handle_window_targeter.h"
     10 #include "ash/wm/window_state_observer.h"
     11 #include "ui/aura/env.h"
     12 #include "ui/aura/window.h"
     13 #include "ui/aura/window_observer.h"
     14 #include "ui/aura/window_targeter.h"
     15 #include "ui/base/hit_test.h"
     16 #include "ui/views/widget/widget.h"
     17 #include "ui/views/widget/widget_delegate.h"
     18 #include "ui/views/window/non_client_view.h"
     19 
     20 namespace ash {
     21 
     22 FrameBorderHitTestController::FrameBorderHitTestController(views::Widget* frame)
     23     : frame_window_(frame->GetNativeWindow()) {
     24   frame_window_->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
     25       new ResizeHandleWindowTargeter(frame_window_, NULL)));
     26 }
     27 
     28 FrameBorderHitTestController::~FrameBorderHitTestController() {
     29 }
     30 
     31 // static
     32 int FrameBorderHitTestController::NonClientHitTest(
     33     views::NonClientFrameView* view,
     34     FrameCaptionButtonContainerView* caption_button_container,
     35     const gfx::Point& point_in_widget) {
     36   gfx::Rect expanded_bounds = view->bounds();
     37   int outside_bounds = kResizeOutsideBoundsSize;
     38 
     39   if (aura::Env::GetInstance()->is_touch_down())
     40     outside_bounds *= kResizeOutsideBoundsScaleForTouch;
     41   expanded_bounds.Inset(-outside_bounds, -outside_bounds);
     42 
     43   if (!expanded_bounds.Contains(point_in_widget))
     44     return HTNOWHERE;
     45 
     46   // Check the frame first, as we allow a small area overlapping the contents
     47   // to be used for resize handles.
     48   views::Widget* frame = view->GetWidget();
     49   bool can_ever_resize = frame->widget_delegate()->CanResize();
     50   // Don't allow overlapping resize handles when the window is maximized or
     51   // fullscreen, as it can't be resized in those states.
     52   int resize_border =
     53       frame->IsMaximized() || frame->IsFullscreen() ? 0 :
     54       kResizeInsideBoundsSize;
     55   int frame_component = view->GetHTComponentForFrame(point_in_widget,
     56                                                      resize_border,
     57                                                      resize_border,
     58                                                      kResizeAreaCornerSize,
     59                                                      kResizeAreaCornerSize,
     60                                                      can_ever_resize);
     61   if (frame_component != HTNOWHERE)
     62     return frame_component;
     63 
     64   int client_component = frame->client_view()->NonClientHitTest(
     65       point_in_widget);
     66   if (client_component != HTNOWHERE)
     67     return client_component;
     68 
     69   if (caption_button_container->visible()) {
     70     gfx::Point point_in_caption_button_container(point_in_widget);
     71     views::View::ConvertPointFromWidget(caption_button_container,
     72         &point_in_caption_button_container);
     73     int caption_button_component = caption_button_container->NonClientHitTest(
     74         point_in_caption_button_container);
     75     if (caption_button_component != HTNOWHERE)
     76       return caption_button_component;
     77   }
     78 
     79   // Caption is a safe default.
     80   return HTCAPTION;
     81 }
     82 
     83 }  // namespace ash
     84