WIP

chrome/browser/ui/ash/launcher/arc_app_window.cc

+// Copyright 2017 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 "chrome/browser/ui/ash/launcher/arc_app_window.h"
+
+#include "chrome/browser/ui/app_list/arc/arc_app_utils.h"
+#include "chrome/browser/ui/ash/launcher/arc_app_window_launcher_controller.h"
+#include "chrome/browser/ui/ash/launcher/arc_app_window_launcher_item_controller.h"
+#include "components/exo/shell_surface.h"
+#include "extensions/common/constants.h"
+#include "ui/aura/window.h"
+#include "ui/gfx/codec/png_codec.h"
+#include "ui/gfx/image/image_skia_operations.h"
+#include "ui/gfx/image/image_skia_source.h"
+#include "ui/views/widget/widget.h"
+
+namespace {
+
+// Set to true for unit tests to avoid IPC icon decoding.
+bool disable_safe_icon_decoding = false;
+
+// Source of the custom icon of ARC app window. It takes reference bitmap and
+// resizes to required scale factor on demand.
+class CustomIconSource : public gfx::ImageSkiaSource {
+ public:
+  explicit CustomIconSource(const SkBitmap& base_image)
+      : base_image_(base_image) {}
+  ~CustomIconSource() override = default;
+
+ private:
+  // gfx::ImageSkiaSource overrides:
+  gfx::ImageSkiaRep GetImageForScale(float scale) override {
+    const gfx::Size target_pixel_size =
+        gfx::ScaleToCeiledSize(gfx::Size(extension_misc::EXTENSION_ICON_SMALL,
+                                         extension_misc::EXTENSION_ICON_SMALL),
+                               scale);
+
+    const SkBitmap resized = skia::ImageOperations::Resize(
+        base_image_, skia::ImageOperations::RESIZE_BEST,
+        target_pixel_size.width(), target_pixel_size.height());
+    return gfx::ImageSkiaRep(resized, scale);
+  }
+
+  const SkBitmap base_image_;
+
+  DISALLOW_COPY_AND_ASSIGN(CustomIconSource);
+};
+
+}  // namespace
+
+ArcAppWindow::ArcAppWindow(int task_id,
+                           const arc::ArcAppShelfId& app_shelf_id,
+                           views::Widget* widget,
+                           ArcAppWindowLauncherController* owner)
+    : task_id_(task_id),
+      app_shelf_id_(app_shelf_id),
+      widget_(widget),
+      owner_(owner) {
+  ExtractIconFromWindow();
+  GetNativeWindow()->AddObserver(this);
+}
+
+ArcAppWindow::~ArcAppWindow() {
+  ImageDecoder::Cancel(this);
+  if (GetNativeWindow())
+    GetNativeWindow()->RemoveObserver(this);
+}
+
+// static
+void ArcAppWindow::DisableSafeIconDecodingForTesting() {
+  disable_safe_icon_decoding = true;
+}
+
+void ArcAppWindow::SetController(
+    ArcAppWindowLauncherItemController* controller) {
+  DCHECK(!controller_ && controller);
+  controller_ = controller;
+}
+
+void ArcAppWindow::ResetController() {
+  controller_ = nullptr;
+}
+
+void ArcAppWindow::SetFullscreenMode(FullScreenMode mode) {
+  DCHECK(mode != FullScreenMode::NOT_DEFINED);
+  fullscreen_mode_ = mode;
+}
+
+bool ArcAppWindow::IsActive() const {
+  return widget_->IsActive() && owner_->active_task_id() == task_id_;
+}
+
+bool ArcAppWindow::IsMaximized() const {
+  NOTREACHED();
+  return false;
+}
+
+bool ArcAppWindow::IsMinimized() const {
+  NOTREACHED();
+  return false;
+}
+
+bool ArcAppWindow::IsFullscreen() const {
+  NOTREACHED();
+  return false;
+}
+
+gfx::NativeWindow ArcAppWindow::GetNativeWindow() const {
+  return widget_->GetNativeWindow();
+}
+
+gfx::Rect ArcAppWindow::GetRestoredBounds() const {
+  NOTREACHED();
+  return gfx::Rect();
+}
+
+ui::WindowShowState ArcAppWindow::GetRestoredState() const {
+  NOTREACHED();
+  return ui::SHOW_STATE_NORMAL;
+}
+
+gfx::Rect ArcAppWindow::GetBounds() const {
+  NOTREACHED();
+  return gfx::Rect();
+}
+
+void ArcAppWindow::Show() {
+  widget_->Show();
+}
+
+void ArcAppWindow::ShowInactive() {
+  NOTREACHED();
+}
+
+void ArcAppWindow::Hide() {
+  NOTREACHED();
+}
+
+void ArcAppWindow::Close() {
+  arc::CloseTask(task_id_);
+}
+
+void ArcAppWindow::Activate() {
+  widget_->Activate();
+}
+
+void ArcAppWindow::Deactivate() {
+  NOTREACHED();
+}
+
+void ArcAppWindow::Maximize() {
+  NOTREACHED();
+}
+
+void ArcAppWindow::Minimize() {
+  widget_->Minimize();
+}
+
+void ArcAppWindow::Restore() {
+  NOTREACHED();
+}
+
+void ArcAppWindow::SetBounds(const gfx::Rect& bounds) {
+  NOTREACHED();
+}
+
+void ArcAppWindow::FlashFrame(bool flash) {
+  NOTREACHED();
+}
+
+bool ArcAppWindow::IsAlwaysOnTop() const {
+  NOTREACHED();
+  return false;
+}
+
+void ArcAppWindow::SetAlwaysOnTop(bool always_on_top) {
+  NOTREACHED();
+}
+
+void ArcAppWindow::ResetIcon() {
+  if (image_skia_.isNull())
+    return;
+  image_skia_ = gfx::ImageSkia();
+  controller()->OnWindowChanged(this);
+}
+
+void ArcAppWindow::ExtractIconFromWindow() {
+  ImageDecoder::Cancel(this);
+  const std::string* unsafe_icon_data =
+      exo::ShellSurface::GetUnsafeIconPngData(GetNativeWindow());
+  if (unsafe_icon_data && !unsafe_icon_data->empty()) {
+    if (disable_safe_icon_decoding) {
+      SkBitmap bitmap;
+      if (gfx::PNGCodec::Decode(reinterpret_cast<const unsigned char*>(
+                                    &unsafe_icon_data->front()),
+                                unsafe_icon_data->length(), &bitmap)) {
+        OnImageDecoded(bitmap);
+      } else {
+        OnDecodeImageFailed();
+      }
+    } else {
+      ImageDecoder::Start(this, *unsafe_icon_data);
+    }
+  } else {
+    ResetIcon();
+  }
+}
+
+void ArcAppWindow::OnWindowPropertyChanged(aura::Window* window,
+                                           const void* key,
+                                           intptr_t old) {
+  if (!exo::ShellSurface::IsUnsafeIconPngDataKey(key))
+    return;
+  ExtractIconFromWindow();
+}
+
+void ArcAppWindow::OnImageDecoded(const SkBitmap& decoded_image) {
+  image_skia_ = gfx::ImageSkia(new CustomIconSource(decoded_image),
+                               gfx::Size(extension_misc::EXTENSION_ICON_SMALL,
+                                         extension_misc::EXTENSION_ICON_SMALL));
+  controller()->OnWindowChanged(this);
+}
+
+void ArcAppWindow::OnDecodeImageFailed() {
+  ResetIcon();
+}