mash: Migrate ash::DragImageView to wm common types

ash/drag_drop/drag_image_view.cc

-// Copyright (c) 2012 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 "ash/drag_drop/drag_image_view.h"
-
-#include "skia/ext/image_operations.h"
-#include "ui/aura/window.h"
-#include "ui/base/resource/resource_bundle.h"
-#include "ui/compositor/dip_util.h"
-#include "ui/gfx/canvas.h"
-#include "ui/gfx/geometry/size_conversions.h"
-#include "ui/resources/grit/ui_resources.h"
-#include "ui/views/widget/widget.h"
-#include "ui/wm/core/shadow_types.h"
-
-namespace ash {
-namespace {
-using views::Widget;
-
-Widget* CreateDragWidget(gfx::NativeView context) {
-  Widget* drag_widget = new Widget;
-  Widget::InitParams params;
-  params.type = Widget::InitParams::TYPE_TOOLTIP;
-  params.keep_on_top = true;
-  params.context = context;
-  params.accept_events = false;
-  params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
-  params.opacity = Widget::InitParams::TRANSLUCENT_WINDOW;
-  drag_widget->Init(params);
-  drag_widget->SetOpacity(1.f);
-  drag_widget->GetNativeWindow()->set_owned_by_parent(false);
-  drag_widget->GetNativeWindow()->SetName("DragWidget");
-  SetShadowType(drag_widget->GetNativeView(), wm::SHADOW_TYPE_NONE);
-  return drag_widget;
-}
-}
-
-DragImageView::DragImageView(gfx::NativeView context,
-                             ui::DragDropTypes::DragEventSource event_source)
-    : views::ImageView(),
-      drag_event_source_(event_source),
-      touch_drag_operation_(ui::DragDropTypes::DRAG_NONE) {
-  widget_.reset(CreateDragWidget(context));
-  widget_->SetContentsView(this);
-  widget_->SetAlwaysOnTop(true);
-
-  // We are owned by the DragDropController.
-  set_owned_by_client();
-}
-
-DragImageView::~DragImageView() {
-  widget_->Hide();
-}
-
-void DragImageView::SetBoundsInScreen(const gfx::Rect& bounds) {
-  widget_->SetBounds(bounds);
-  widget_size_ = bounds.size();
-}
-
-void DragImageView::SetScreenPosition(const gfx::Point& position) {
-  widget_->SetBounds(gfx::Rect(position, widget_size_));
-}
-
-gfx::Rect DragImageView::GetBoundsInScreen() const {
-  return widget_->GetWindowBoundsInScreen();
-}
-
-void DragImageView::SetWidgetVisible(bool visible) {
-  if (visible != widget_->IsVisible()) {
-    if (visible)
-      widget_->Show();
-    else
-      widget_->Hide();
-  }
-}
-
-void DragImageView::SetTouchDragOperationHintOff() {
-  // Simply set the drag type to non-touch so that no hint is drawn.
-  drag_event_source_ = ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE;
-  SchedulePaint();
-}
-
-void DragImageView::SetTouchDragOperation(int operation) {
-  if (touch_drag_operation_ == operation)
-    return;
-  touch_drag_operation_ = operation;
-  SchedulePaint();
-}
-
-void DragImageView::SetTouchDragOperationHintPosition(
-    const gfx::Point& position) {
-  if (touch_drag_operation_indicator_position_ == position)
-    return;
-  touch_drag_operation_indicator_position_ = position;
-  SchedulePaint();
-}
-
-void DragImageView::SetOpacity(float visibility) {
-  DCHECK_GE(visibility, 0.0f);
-  DCHECK_LE(visibility, 1.0f);
-  widget_->SetOpacity(visibility);
-}
-
-void DragImageView::OnPaint(gfx::Canvas* canvas) {
-  if (GetImage().isNull())
-    return;
-
-  // |widget_size_| is in DIP. ImageSkia::size() also returns the size in DIP.
-  if (GetImage().size() == widget_size_) {
-    canvas->DrawImageInt(GetImage(), 0, 0);
-  } else {
-    float device_scale = 1;
-    if (widget_->GetNativeView() && widget_->GetNativeView()->layer()) {
-      device_scale =
-          ui::GetDeviceScaleFactor(widget_->GetNativeView()->layer());
-    }
-    // The drag image already has device scale factor applied. But
-    // |widget_size_| is in DIP units.
-    gfx::Size scaled_widget_size =
-        gfx::ScaleToRoundedSize(widget_size_, device_scale);
-    gfx::ImageSkiaRep image_rep = GetImage().GetRepresentation(device_scale);
-    if (image_rep.is_null())
-      return;
-    SkBitmap scaled = skia::ImageOperations::Resize(
-        image_rep.sk_bitmap(), skia::ImageOperations::RESIZE_LANCZOS3,
-        scaled_widget_size.width(), scaled_widget_size.height());
-    gfx::ImageSkia image_skia(gfx::ImageSkiaRep(scaled, device_scale));
-    canvas->DrawImageInt(image_skia, 0, 0);
-  }
-
-  if (drag_event_source_ != ui::DragDropTypes::DRAG_EVENT_SOURCE_TOUCH)
-    return;
-
-  gfx::Image* drag_hint = DragHint();
-  if (drag_hint->IsEmpty())
-    return;
-
-  // Make sure drag hint image is positioned within the widget.
-  gfx::Size drag_hint_size = drag_hint->Size();
-  gfx::Point drag_hint_position = touch_drag_operation_indicator_position_;
-  drag_hint_position.Offset(-drag_hint_size.width() / 2, 0);
-  gfx::Rect drag_hint_bounds(drag_hint_position, drag_hint_size);
-  drag_hint_bounds.AdjustToFit(gfx::Rect(widget_size_));
-
-  // Draw image.
-  canvas->DrawImageInt(*(drag_hint->ToImageSkia()), drag_hint_bounds.x(),
-                       drag_hint_bounds.y());
-}
-
-gfx::Image* DragImageView::DragHint() const {
-  // Select appropriate drag hint.
-  gfx::Image* drag_hint =
-      &ui::ResourceBundle::GetSharedInstance().GetImageNamed(
-          IDR_TOUCH_DRAG_TIP_NODROP);
-  if (touch_drag_operation_ & ui::DragDropTypes::DRAG_COPY) {
-    drag_hint = &ui::ResourceBundle::GetSharedInstance().GetImageNamed(
-        IDR_TOUCH_DRAG_TIP_COPY);
-  } else if (touch_drag_operation_ & ui::DragDropTypes::DRAG_MOVE) {
-    drag_hint = &ui::ResourceBundle::GetSharedInstance().GetImageNamed(
-        IDR_TOUCH_DRAG_TIP_MOVE);
-  } else if (touch_drag_operation_ & ui::DragDropTypes::DRAG_LINK) {
-    drag_hint = &ui::ResourceBundle::GetSharedInstance().GetImageNamed(
-        IDR_TOUCH_DRAG_TIP_LINK);
-  }
-  return drag_hint;
-}
-
-void DragImageView::Layout() {
-  View::Layout();
-
-  gfx::Image* drag_hint = DragHint();
-  if (drag_hint->IsEmpty())
-    return;
-
-  gfx::Size drag_hint_size = drag_hint->Size();
-
-  // Enlarge widget if required to fit the drag hint image.
-  if (drag_hint_size.width() > widget_size_.width() ||
-      drag_hint_size.height() > widget_size_.height()) {
-    gfx::Size new_widget_size = widget_size_;
-    new_widget_size.SetToMax(drag_hint_size);
-    widget_->SetSize(new_widget_size);
-  }
-}
-
-}  // namespace ash