Shell of implementation for embedded windows. At this point this is

aura/window.cc

+// Copyright (c) 2011 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 "aura/window.h"
+
+#include "aura/desktop.h"
+#include "aura/window_delegate.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "ui/gfx/compositor/compositor.h"
+#include "ui/gfx/compositor/layer.h"
+
+namespace aura {
+
+// TODO: do we need to support child windows?
+Window::Window(Desktop* desktop)
+    : desktop_(desktop),
+      delegate_(NULL),
+      visibility_(VISIBILITY_HIDDEN),
+      // TODO: Need to make layers lazily create the texture.
+      layer_(new ui::Layer(desktop->compositor())),
+      needs_paint_all_(true) {
+}
+
+Window::~Window() {
+}
+
+void Window::SetVisibility(Visibility visibility) {
+  if (visibility_ == visibility)
+    return;
+
+  visibility_ = visibility;
+  if (visibility_ == VISIBILITY_SHOWN) {
+    // TODO: move to top of window stack?
+    desktop_->Show(this);
+  } else {
+    // TODO: hide?
+    desktop_->Hide(this);
+  }
+}
+
+void Window::SetBounds(const gfx::Rect& bounds, int anim_ms) {
+  // TODO: support anim_ms
+  // TODO: funnel this through the Desktop.
+  bounds_ = bounds;
+  layer_->set_bounds(bounds);
+}
+
+void Window::SchedulePaint(const gfx::Rect& bounds) {
+  if (dirty_rect_.IsEmpty())
+    dirty_rect_ = bounds;
+  else
+    dirty_rect_ = dirty_rect_.Union(bounds);
+}
+
+void Window::SetCanvas(const SkCanvas& canvas, const gfx::Point& origin) {
+  // TODO: figure out how this is going to work when animating the layer. In
+  // particular if we're animating the size then the underyling Texture is going
+  // to be unhappy if we try to set a texture on a size bigger than the size of
+  // the texture.
+  layer_->SetCanvas(canvas, origin);
+}
+
+void Window::Draw() {
+  if (visibility_ != VISIBILITY_HIDDEN)
+    layer_->Draw();
+}
+
+void Window::UpdateLayerCanvas() {
+  if (needs_paint_all_) {
+    needs_paint_all_ = false;
+    dirty_rect_ = gfx::Rect(0, 0, bounds().width(), bounds().height());
+  }
+  gfx::Rect dirty_rect = dirty_rect_.Intersect(

[Daniel Erat, 2011/07/28 23:00:37]

is this Intersect() here to handle a case where |dirty_rect_| extends outside of
bounds(), e.g. the whole window was marked dirty and then it was resized to be
smaller?

[sky, 2011/07/29 15:42:23]

Exactly.

+      gfx::Rect(0, 0, bounds().width(), bounds().height()));
+  dirty_rect_.SetRect(0, 0, 0, 0);
+  if (dirty_rect.IsEmpty())
+    return;
+  if (delegate_)
+    delegate_->OnPaint(dirty_rect);
+}
+
+}  // namespace aura