ozone: caca: Convert to PlatformWindow

ui/ozone/platform/caca/caca_window.cc

+// Copyright 2014 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 "ui/ozone/platform/caca/caca_window.h"
+
+#include "base/bind.h"
+#include "base/debug/trace_event.h"
+#include "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "ui/events/platform/platform_event_source.h"
+#include "ui/ozone/platform/caca/caca_event_factory.h"
+#include "ui/ozone/platform/caca/caca_window_manager.h"
+#include "ui/platform_window/platform_window_delegate.h"
+
+namespace ui {
+
+namespace {
+
+// Size of initial cnavas (in characters).
+const int kDefaultCanvasWidth = 160;
+const int kDefaultCanvasHeight = 48;
+
+}  // namespace
+
+// TODO(dnicoara) As an optimization, |bitmap_size_| should be scaled based on
+// |physical_size_| and font size.
+CacaWindow::CacaWindow(PlatformWindowDelegate* delegate,
+                       CacaWindowManager* manager,
+                       CacaEventFactory* event_factory,
+                       const gfx::Rect& bounds)
+    : delegate_(delegate),
+      manager_(manager),
+      event_factory_(event_factory),
+      weak_ptr_factory_(this) {
+  widget_ = manager_->AddWindow(this);
+  ui::PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
+  delegate_->OnAcceleratedWidgetAvailable(widget_);
+}
+
+CacaWindow::~CacaWindow() {
+  ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
+  manager_->RemoveWindow(widget_, this);
+}
+
+bool CacaWindow::Initialize() {
+  if (display_)
+    return true;
+
+  canvas_.reset(caca_create_canvas(kDefaultCanvasWidth, kDefaultCanvasHeight));
+  if (!canvas_) {
+    PLOG(ERROR) << "failed to create libcaca canvas";
+    return false;
+  }
+
+  display_.reset(caca_create_display(canvas_.get()));
+  if (!display_) {
+    PLOG(ERROR) << "failed to initialize libcaca display";
+    return false;
+  }
+
+  caca_set_cursor(display_.get(), 1);
+  caca_set_display_title(display_.get(), "Ozone Content Shell");
+
+  UpdateDisplaySize();
+
+  TryProcessingEvent();
+
+  return true;
+}
+
+void CacaWindow::TryProcessingEvent() {
+  event_factory_->TryProcessingEvent(this);
+
+  // Caca uses a poll based event retrieval. Since we don't want to block we'd
+  // either need to spin up a new thread or just poll. For simplicity just poll
+  // for messages.
+  base::MessageLoop::current()->PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&CacaWindow::TryProcessingEvent,
+                 weak_ptr_factory_.GetWeakPtr()),
+      base::TimeDelta::FromMilliseconds(10));
+}
+
+void CacaWindow::UpdateDisplaySize() {
+  physical_size_.SetSize(caca_get_canvas_width(canvas_.get()),
+                         caca_get_canvas_height(canvas_.get()));
+
+  bitmap_size_.SetSize(caca_get_display_width(display_.get()),
+                       caca_get_display_height(display_.get()));
+}
+
+void CacaWindow::OnCacaResize() {
+  UpdateDisplaySize();
+
+  delegate_->OnBoundsChanged(gfx::Rect(bitmap_size_));
+}
+
+void CacaWindow::OnCacaQuit() {
+  delegate_->OnCloseRequest();
+}
+
+
+void CacaWindow::OnCacaEvent(ui::Event* event) {
+  delegate_->DispatchEvent(event);
+}
+
+gfx::Rect CacaWindow::GetBounds() { return gfx::Rect(bitmap_size_); }
+
+void CacaWindow::SetBounds(const gfx::Rect& bounds) {}
+
+void CacaWindow::Show() {}
+
+void CacaWindow::Hide() {}
+
+void CacaWindow::Close() {}
+
+void CacaWindow::SetCapture() {}
+
+void CacaWindow::ReleaseCapture() {}
+
+void CacaWindow::ToggleFullscreen() {}
+
+void CacaWindow::Maximize() {}
+
+void CacaWindow::Minimize() {}
+
+void CacaWindow::Restore() {}
+
+bool CacaWindow::CanDispatchEvent(const PlatformEvent& event) { return true; }
+
+uint32_t CacaWindow::DispatchEvent(const PlatformEvent& ne) {
+  // We don't dispatch events via PlatformEventSource.
+  NOTREACHED();
+  return ui::POST_DISPATCH_STOP_PROPAGATION;
+}
+
+}  // namespace ui