Initial crack at new workspace behavior. Each workspace now has its

ash/wm/workspace/workspace2.cc

Index: ash/wm/workspace/workspace2.cc
diff --git a/ash/wm/workspace/workspace2.cc b/ash/wm/workspace/workspace2.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9d585b5c67fc4dfb7de7dad78803974c772206d5
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+++ b/ash/wm/workspace/workspace2.cc
@@ -0,0 +1,86 @@
+// 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/wm/workspace/workspace2.h"
+
+#include "ash/shell_window_ids.h"
+#include "ash/wm/property_util.h"
+#include "ash/wm/window_properties.h"
+#include "ash/wm/window_util.h"
+#include "ash/wm/workspace/workspace_event_filter.h"
+#include "ash/wm/workspace/workspace_manager2.h"
+#include "ui/aura/window.h"
+
+namespace ash {
+namespace internal {
+
+Workspace2::Workspace2(WorkspaceManager2* manager,
+                       aura::Window* parent,
+                       bool is_maximized)
+    : is_maximized_(is_maximized),
+      workspace_manager_(manager),
+      window_(new aura::Window(NULL)),
+      event_filter_(new WorkspaceEventFilter(window_)) {
+  window_->set_id(kShellWindowId_WorkspaceContainer);
+  window_->SetName("WorkspaceContainer");
+  window_->Init(ui::LAYER_NOT_DRAWN);
+  window_->Show();
+  window_->SetParent(parent);
+  window_->SetEventFilter(event_filter_);
+  window_->SetProperty(internal::kUsesScreenCoordinatesKey, true);
+}
+
+Workspace2::~Workspace2() {
+  // ReleaseWindow() should have been invoked before we're deleted.
+  DCHECK(!window_);
+}
+
+aura::Window* Workspace2::ReleaseWindow() {
+  // Remove the LayoutManager and EventFilter as they refer back to us and/or
+  // WorkspaceManager.
+  window_->SetLayoutManager(NULL);
+  window_->SetEventFilter(NULL);
+  aura::Window* window = window_;
+  window_ = NULL;
+  event_filter_ = NULL;
+  return window;
+}
+
+void Workspace2::SetGridSize(int grid_size) {
+  event_filter_->set_grid_size(grid_size);
+}
+
+bool Workspace2::ShouldMoveToPending() const {
+  if (!is_maximized_)
+    return false;
+
+  bool has_visible_non_maximized_window = false;
+  for (size_t i = 0; i < window_->children().size(); ++i) {
+    aura::Window* child(window_->children()[i]);
+    if (!child->TargetVisibility() || wm::IsWindowMinimized(child))
+      continue;
+    if (WorkspaceManager2::IsMaximized(child))
+      return false;
+
+    if (GetTrackedByWorkspace(child) && !GetPersistsAcrossAllWorkspaces(child))
+      has_visible_non_maximized_window = true;
+  }
+  return !has_visible_non_maximized_window;
+}
+
+int Workspace2::GetNumMaximizedWindows() const {
+  int count = 0;
+  for (size_t i = 0; i < window_->children().size(); ++i) {
+    aura::Window* child = window_->children()[i];
+    if (WorkspaceManager2::IsMaximized(child) ||
+        WorkspaceManager2::WillRestoreMaximized(child)) {
+      if (++count == 2)
+        return count;
+    }
+  }
+  return count;
+}
+
+}  // namespace internal
+}  // namespace ash