chromeos: Move files in //ash/common to //ash, part 2

ash/common/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/common/drag_drop/drag_image_view.h"
-
-#include <memory>
-
-#include "ash/common/wm_window.h"
-#include "ash/public/cpp/shell_window_ids.h"
-#include "ash/root_window_controller.h"
-#include "skia/ext/image_operations.h"
-#include "ui/base/resource/resource_bundle.h"
-#include "ui/display/display.h"
-#include "ui/gfx/canvas.h"
-#include "ui/resources/grit/ui_resources.h"
-#include "ui/views/widget/widget.h"
-
-namespace ash {
-namespace {
-using views::Widget;
-
-std::unique_ptr<Widget> CreateDragWidget(WmWindow* root_window) {
-  std::unique_ptr<Widget> drag_widget(new Widget);
-  Widget::InitParams params;
-  params.type = Widget::InitParams::TYPE_TOOLTIP;
-  params.name = "DragWidget";
-  params.keep_on_top = true;
-  params.accept_events = false;
-  params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
-  params.shadow_type = Widget::InitParams::SHADOW_TYPE_NONE;
-  params.opacity = Widget::InitParams::TRANSLUCENT_WINDOW;
-  root_window->GetRootWindowController()->ConfigureWidgetInitParamsForContainer(
-      drag_widget.get(), kShellWindowId_DragImageAndTooltipContainer, &params);
-  drag_widget->Init(params);
-  drag_widget->SetOpacity(1.f);
-  return drag_widget;
-}
-
-}  // namespace
-
-DragImageView::DragImageView(WmWindow* root_window,
-                             ui::DragDropTypes::DragEventSource event_source)
-    : drag_event_source_(event_source),
-      touch_drag_operation_(ui::DragDropTypes::DRAG_NONE) {
-  DCHECK(root_window);
-  widget_ = CreateDragWidget(root_window);
-  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) {
-  drag_image_size_ = bounds.size();
-  widget_->SetBounds(bounds);
-}
-
-void DragImageView::SetScreenPosition(const gfx::Point& position) {
-  widget_->SetBounds(
-      gfx::Rect(position, widget_->GetWindowBoundsInScreen().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;
-
-  // This disables the drag hint image. This should reduce the widget size if
-  // the drag image is smaller than the drag hint image, so we set new bounds.
-  gfx::Rect new_bounds = GetBoundsInScreen();
-  new_bounds.set_size(drag_image_size_);
-  SetBoundsInScreen(new_bounds);
-  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;
-
-  // |drag_image_size_| is in DIP.
-  // ImageSkia::size() also returns the size in DIP.
-  if (GetImage().size() == drag_image_size_) {
-    canvas->DrawImageInt(GetImage(), 0, 0);
-  } else {
-    WmWindow* window = WmWindow::Get(widget_->GetNativeWindow());
-    const float device_scale =
-        window->GetDisplayNearestWindow().device_scale_factor();
-    // The drag image already has device scale factor applied. But
-    // |drag_image_size_| is in DIP units.
-    gfx::Size drag_image_size_pixels =
-        gfx::ScaleToRoundedSize(drag_image_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,
-        drag_image_size_pixels.width(), drag_image_size_pixels.height());
-    gfx::ImageSkia image_skia(gfx::ImageSkiaRep(scaled, device_scale));
-    canvas->DrawImageInt(image_skia, 0, 0);
-  }
-
-  gfx::Image* drag_hint = DragHint();
-  if (!ShouldDrawDragHint() || 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);
-
-  gfx::Size widget_size = widget_->GetWindowBoundsInScreen().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;
-}
-
-bool DragImageView::ShouldDrawDragHint() const {
-  return drag_event_source_ == ui::DragDropTypes::DRAG_EVENT_SOURCE_TOUCH;
-}
-
-gfx::Size DragImageView::GetMinimumSize() const {
-  gfx::Size minimum_size = drag_image_size_;
-  if (ShouldDrawDragHint())
-    minimum_size.SetToMax(DragHint()->Size());
-  return minimum_size;
-}
-
-void DragImageView::Layout() {
-  View::Layout();
-
-  // Only consider resizing the widget for the drag hint image if we are in a
-  // touch initiated drag.
-  gfx::Image* drag_hint = DragHint();
-  if (!ShouldDrawDragHint() || drag_hint->IsEmpty())
-    return;
-
-  gfx::Size drag_hint_size = drag_hint->Size();
-
-  // Enlarge widget if required to fit the drag hint image.
-  gfx::Size widget_size = widget_->GetWindowBoundsInScreen().size();
-  if (drag_hint_size.width() > widget_size.width() ||
-      drag_hint_size.height() > widget_size.height()) {
-    widget_size.SetToMax(drag_hint_size);
-    widget_->SetSize(widget_size);
-  }
-}
-
-}  // namespace ash