components: Add Exosphere component.

components/exo/shell_surface.cc

+// Copyright 2015 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 "components/exo/shell_surface.h"
+
+#include "ash/shell.h"
+#include "ash/shell_window_ids.h"
+#include "base/logging.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/trace_event/trace_event.h"
+#include "base/trace_event/trace_event_argument.h"
+#include "components/exo/surface.h"
+#include "ui/aura/window.h"
+#include "ui/base/hit_test.h"
+#include "ui/views/widget/widget.h"
+
+namespace exo {
+namespace {
+
+class CustomFrameView : public views::NonClientFrameView {
+ public:
+  explicit CustomFrameView(views::Widget* widget) : widget_(widget) {}
+  ~CustomFrameView() override {}
+
+  // Overridden from views::NonClientFrameView:
+  gfx::Rect GetBoundsForClientView() const override { return bounds(); }
+  gfx::Rect GetWindowBoundsForClientBounds(
+      const gfx::Rect& client_bounds) const override {
+    return client_bounds;
+  }
+  int NonClientHitTest(const gfx::Point& point) override {
+    return widget_->client_view()->NonClientHitTest(point);
+  }
+  void GetWindowMask(const gfx::Size& size, gfx::Path* window_mask) override {}
+  void ResetWindowControls() override {}
+  void UpdateWindowIcon() override {}
+  void UpdateWindowTitle() override {}
+  void SizeConstraintsChanged() override {}
+
+ private:
+  views::Widget* const widget_;
+
+  DISALLOW_COPY_AND_ASSIGN(CustomFrameView);
+};
+
+}  // namespace
+
+////////////////////////////////////////////////////////////////////////////////
+// ShellSurface, public:
+
+ShellSurface::ShellSurface(Surface* surface)
+    : surface_(surface), show_state_(ui::SHOW_STATE_END) {
+  surface_->SetSurfaceDelegate(this);
+}
+
+ShellSurface::~ShellSurface() {
+  if (surface_)
+    surface_->SetSurfaceDelegate(nullptr);
+  if (widget_)
+    widget_->CloseNow();
+}
+
+void ShellSurface::Show() {
+  TRACE_EVENT0("exo", "ShellSurface::Show");
+
+  if (!widget_ && show_state_ == ui::SHOW_STATE_END)
+    show_state_ = ui::SHOW_STATE_DEFAULT;
+}
+
+void ShellSurface::SetToplevel() {
+  TRACE_EVENT0("exo", "ShellSurface::SetToplevel");
+
+  if (!widget_)
+    show_state_ = ui::SHOW_STATE_NORMAL;
+}
+
+void ShellSurface::SetFullscreen(bool fullscreen) {
+  TRACE_EVENT1("exo", "ShellSurface::SetFullscreen", "fullscreen", fullscreen);
+
+  if (widget_) {
+    widget_->SetFullscreen(fullscreen);
+    return;
+  }
+
+  show_state_ = fullscreen ? ui::SHOW_STATE_FULLSCREEN : ui::SHOW_STATE_DEFAULT;
+}
+
+void ShellSurface::SetTitle(const base::string16& title) {
+  TRACE_EVENT1("exo", "ShellSurface::SetTitle", "title",
+               base::UTF16ToUTF8(title));
+
+  title_ = title;
+  if (widget_)
+    widget_->UpdateWindowTitle();
+}
+
+scoped_refptr<base::trace_event::TracedValue> ShellSurface::AsTracedValue()
+    const {
+  scoped_refptr<base::trace_event::TracedValue> value =
+      new base::trace_event::TracedValue;
+  value->SetString("title", base::UTF16ToUTF8(title_));
+  return value;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// SurfaceDelegate overrides:
+
+void ShellSurface::OnSurfaceDestroying() {
+  surface_ = nullptr;
+}
+
+void ShellSurface::OnSurfaceCommit() {
+  if (widget_ || show_state_ == ui::SHOW_STATE_END)
+    return;
+
+  views::Widget::InitParams params;
+  params.type = views::Widget::InitParams::TYPE_WINDOW;
+  params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  params.delegate = this;
+  params.shadow_type = show_state_ == ui::SHOW_STATE_NORMAL
+                           ? views::Widget::InitParams::SHADOW_TYPE_DROP
+                           : views::Widget::InitParams::SHADOW_TYPE_NONE;
+  params.opacity = show_state_ == ui::SHOW_STATE_NORMAL
+                       ? views::Widget::InitParams::OPAQUE_WINDOW
+                       : views::Widget::InitParams::TRANSLUCENT_WINDOW;
+  params.show_state = show_state_;
+  params.parent = ash::Shell::GetContainer(
+      ash::Shell::GetPrimaryRootWindow(), ash::kShellWindowId_DefaultContainer);
+  widget_.reset(new views::Widget);
+  widget_->Init(params);
+  widget_->GetNativeWindow()->set_owned_by_parent(false);
+  widget_->GetNativeView()->SetName("ShellSurface");
+  widget_->Show();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// views::WidgetDelegate overrides:
+
+base::string16 ShellSurface::GetWindowTitle() const {
+  return title_;
+}
+
+views::Widget* ShellSurface::GetWidget() {
+  return widget_.get();
+}
+
+const views::Widget* ShellSurface::GetWidget() const {
+  return widget_.get();
+}
+
+views::View* ShellSurface::GetContentsView() {
+  return surface_;
+}
+
+views::NonClientFrameView* ShellSurface::CreateNonClientFrameView(
+    views::Widget* widget) {
+  // Default show state is borderless and requires a custom frame view as the
+  // default one does not support this.
+  return show_state_ != ui::SHOW_STATE_NORMAL ? new CustomFrameView(widget)
+                                              : nullptr;
+}
+
+}  // namespace exo