(fix landed) Reland of name MaximizeMode to TabletMode

ash/wm/tablet_mode/tablet_mode_window_state.cc

Index: ash/wm/tablet_mode/tablet_mode_window_state.cc
diff --git a/ash/wm/tablet_mode/tablet_mode_window_state.cc b/ash/wm/tablet_mode/tablet_mode_window_state.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5537568d834b3401877e09817f7f8390db35060a
--- /dev/null
+++ b/ash/wm/tablet_mode/tablet_mode_window_state.cc
@@ -0,0 +1,350 @@
+// 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 "ash/wm/tablet_mode/tablet_mode_window_state.h"
+
+#include <utility>
+
+#include "ash/public/cpp/shell_window_ids.h"
+#include "ash/screen_util.h"
+#include "ash/shell.h"
+#include "ash/wm/screen_pinning_controller.h"
+#include "ash/wm/tablet_mode/tablet_mode_window_manager.h"
+#include "ash/wm/window_animation_types.h"
+#include "ash/wm/window_properties.h"
+#include "ash/wm/window_state_util.h"
+#include "ash/wm/wm_event.h"
+#include "ash/wm_window.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_delegate.h"
+#include "ui/compositor/layer.h"
+#include "ui/gfx/geometry/rect.h"
+
+namespace ash {
+namespace {
+
+// Sets the restore bounds and show state overrides. These values take
+// precedence over the restore bounds and restore show state (if set).
+// If |bounds_override| is empty the values are cleared.
+void SetWindowRestoreOverrides(aura::Window* window,
+                               const gfx::Rect& bounds_override,
+                               ui::WindowShowState window_state_override) {
+  if (bounds_override.IsEmpty()) {
+    window->ClearProperty(kRestoreShowStateOverrideKey);
+    window->ClearProperty(kRestoreBoundsOverrideKey);
+    return;
+  }
+  window->SetProperty(kRestoreShowStateOverrideKey, window_state_override);
+  window->SetProperty(kRestoreBoundsOverrideKey,
+                      new gfx::Rect(bounds_override));
+}
+
+// Returns the biggest possible size for a window which is about to be
+// maximized.
+gfx::Size GetMaximumSizeOfWindow(wm::WindowState* window_state) {
+  DCHECK(window_state->CanMaximize() || window_state->CanResize());
+
+  gfx::Size workspace_size =
+      ScreenUtil::GetMaximizedWindowBoundsInParent(window_state->window())
+          .size();
+
+  gfx::Size size = window_state->window()->delegate()
+                       ? window_state->window()->delegate()->GetMaximumSize()
+                       : gfx::Size();
+  if (size.IsEmpty())
+    return workspace_size;
+
+  size.SetToMin(workspace_size);
+  return size;
+}
+
+// Returns the centered bounds of the given bounds in the work area.
+gfx::Rect GetCenteredBounds(const gfx::Rect& bounds_in_parent,
+                            wm::WindowState* state_object) {
+  gfx::Rect work_area_in_parent =
+      ScreenUtil::GetDisplayWorkAreaBoundsInParent(state_object->window());
+  work_area_in_parent.ClampToCenteredSize(bounds_in_parent.size());
+  return work_area_in_parent;
+}
+
+// Returns the maximized/full screen and/or centered bounds of a window.
+gfx::Rect GetBoundsInMaximizedMode(wm::WindowState* state_object) {
+  if (state_object->IsFullscreen() || state_object->IsPinned())
+    return ScreenUtil::GetDisplayBoundsInParent(state_object->window());
+
+  gfx::Rect bounds_in_parent;
+  // Make the window as big as possible.
+  if (state_object->CanMaximize() || state_object->CanResize()) {
+    bounds_in_parent.set_size(GetMaximumSizeOfWindow(state_object));
+  } else {
+    // We prefer the user given window dimensions over the current windows
+    // dimensions since they are likely to be the result from some other state
+    // object logic.
+    if (state_object->HasRestoreBounds())
+      bounds_in_parent = state_object->GetRestoreBoundsInParent();
+    else
+      bounds_in_parent = state_object->window()->bounds();
+  }
+  return GetCenteredBounds(bounds_in_parent, state_object);
+}
+
+gfx::Rect GetRestoreBounds(wm::WindowState* window_state) {
+  if (window_state->IsMinimized() || window_state->IsMaximized() ||
+      window_state->IsFullscreen()) {
+    gfx::Rect restore_bounds = window_state->GetRestoreBoundsInScreen();
+    if (!restore_bounds.IsEmpty())
+      return restore_bounds;
+  }
+  return window_state->window()->GetBoundsInScreen();
+}
+
+}  // namespace
+
+// static
+void TabletModeWindowState::UpdateWindowPosition(
+    wm::WindowState* window_state) {
+  gfx::Rect bounds_in_parent = GetBoundsInMaximizedMode(window_state);
+  if (bounds_in_parent == window_state->window()->bounds())
+    return;
+  window_state->SetBoundsDirect(bounds_in_parent);
+}
+
+TabletModeWindowState::TabletModeWindowState(aura::Window* window,
+                                             TabletModeWindowManager* creator)
+    : window_(window),
+      creator_(creator),
+      current_state_type_(wm::GetWindowState(window)->GetStateType()),
+      defer_bounds_updates_(false) {
+  old_state_.reset(wm::GetWindowState(window)
+                       ->SetStateObject(std::unique_ptr<State>(this))
+                       .release());
+}
+
+TabletModeWindowState::~TabletModeWindowState() {
+  creator_->WindowStateDestroyed(window_);
+}
+
+void TabletModeWindowState::LeaveTabletMode(wm::WindowState* window_state) {
+  // Note: When we return we will destroy ourselves with the |our_reference|.
+  std::unique_ptr<wm::WindowState::State> our_reference =
+      window_state->SetStateObject(std::move(old_state_));
+}
+
+void TabletModeWindowState::SetDeferBoundsUpdates(bool defer_bounds_updates) {
+  if (defer_bounds_updates_ == defer_bounds_updates)
+    return;
+
+  defer_bounds_updates_ = defer_bounds_updates;
+  if (!defer_bounds_updates_)
+    UpdateBounds(wm::GetWindowState(window_), true);
+}
+
+void TabletModeWindowState::OnWMEvent(wm::WindowState* window_state,
+                                      const wm::WMEvent* event) {
+  // Ignore events that are sent during the exit transition.
+  if (ignore_wm_events_) {
+    return;
+  }
+
+  switch (event->type()) {
+    case wm::WM_EVENT_TOGGLE_FULLSCREEN:
+      ToggleFullScreen(window_state, window_state->delegate());
+      break;
+    case wm::WM_EVENT_FULLSCREEN:
+      UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_FULLSCREEN, true);
+      break;
+    case wm::WM_EVENT_PIN:
+      if (!Shell::Get()->screen_pinning_controller()->IsPinned())
+        UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_PINNED, true);
+      break;
+    case wm::WM_EVENT_TRUSTED_PIN:
+      if (!Shell::Get()->screen_pinning_controller()->IsPinned())
+        UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_TRUSTED_PINNED, true);
+      break;
+    case wm::WM_EVENT_TOGGLE_MAXIMIZE_CAPTION:
+    case wm::WM_EVENT_TOGGLE_VERTICAL_MAXIMIZE:
+    case wm::WM_EVENT_TOGGLE_HORIZONTAL_MAXIMIZE:
+    case wm::WM_EVENT_TOGGLE_MAXIMIZE:
+    case wm::WM_EVENT_CYCLE_SNAP_LEFT:
+    case wm::WM_EVENT_CYCLE_SNAP_RIGHT:
+    case wm::WM_EVENT_CENTER:
+    case wm::WM_EVENT_SNAP_LEFT:
+    case wm::WM_EVENT_SNAP_RIGHT:
+    case wm::WM_EVENT_NORMAL:
+    case wm::WM_EVENT_MAXIMIZE:
+      UpdateWindow(window_state, GetMaximizedOrCenteredWindowType(window_state),
+                   true);
+      return;
+    case wm::WM_EVENT_MINIMIZE:
+      UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_MINIMIZED, true);
+      return;
+    case wm::WM_EVENT_SHOW_INACTIVE:
+      return;
+    case wm::WM_EVENT_SET_BOUNDS:
+      if (current_state_type_ == wm::WINDOW_STATE_TYPE_MAXIMIZED) {
+        // Having a maximized window, it could have been created with an empty
+        // size and the caller should get his size upon leaving the maximized
+        // mode. As such we set the restore bounds to the requested bounds.
+        gfx::Rect bounds_in_parent =
+            (static_cast<const wm::SetBoundsEvent*>(event))->requested_bounds();
+        if (!bounds_in_parent.IsEmpty())
+          window_state->SetRestoreBoundsInParent(bounds_in_parent);
+      } else if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED &&
+                 current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN &&
+                 current_state_type_ != wm::WINDOW_STATE_TYPE_PINNED &&
+                 current_state_type_ != wm::WINDOW_STATE_TYPE_TRUSTED_PINNED) {
+        // In all other cases (except for minimized windows) we respect the
+        // requested bounds and center it to a fully visible area on the screen.
+        gfx::Rect bounds_in_parent =
+            (static_cast<const wm::SetBoundsEvent*>(event))->requested_bounds();
+        bounds_in_parent = GetCenteredBounds(bounds_in_parent, window_state);
+        if (bounds_in_parent != window_state->window()->bounds()) {
+          if (window_state->window()->IsVisible())
+            window_state->SetBoundsDirectAnimated(bounds_in_parent);
+          else
+            window_state->SetBoundsDirect(bounds_in_parent);
+        }
+      }
+      break;
+    case wm::WM_EVENT_ADDED_TO_WORKSPACE:
+      if (current_state_type_ != wm::WINDOW_STATE_TYPE_MAXIMIZED &&
+          current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN &&
+          current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED) {
+        wm::WindowStateType new_state =
+            GetMaximizedOrCenteredWindowType(window_state);
+        UpdateWindow(window_state, new_state, true);
+      }
+      break;
+    case wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED:
+      if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED)
+        UpdateBounds(window_state, true);
+      break;
+    case wm::WM_EVENT_DISPLAY_BOUNDS_CHANGED:
+      // Don't animate on a screen rotation - just snap to new size.
+      if (current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED)
+        UpdateBounds(window_state, false);
+      break;
+  }
+}
+
+wm::WindowStateType TabletModeWindowState::GetType() const {
+  return current_state_type_;
+}
+
+void TabletModeWindowState::AttachState(
+    wm::WindowState* window_state,
+    wm::WindowState::State* previous_state) {
+  current_state_type_ = previous_state->GetType();
+
+  gfx::Rect restore_bounds = GetRestoreBounds(window_state);
+  if (!restore_bounds.IsEmpty()) {
+    // We do not want to do a session restore to our window states. Therefore
+    // we tell the window to use the current default states instead.
+    SetWindowRestoreOverrides(window_state->window(), restore_bounds,
+                              window_state->GetShowState());
+  }
+
+  // Initialize the state to a good preset.
+  if (current_state_type_ != wm::WINDOW_STATE_TYPE_MAXIMIZED &&
+      current_state_type_ != wm::WINDOW_STATE_TYPE_MINIMIZED &&
+      current_state_type_ != wm::WINDOW_STATE_TYPE_FULLSCREEN &&
+      current_state_type_ != wm::WINDOW_STATE_TYPE_PINNED &&
+      current_state_type_ != wm::WINDOW_STATE_TYPE_TRUSTED_PINNED) {
+    UpdateWindow(window_state, GetMaximizedOrCenteredWindowType(window_state),
+                 true);
+  }
+
+  window_state->set_can_be_dragged(false);
+}
+
+void TabletModeWindowState::DetachState(wm::WindowState* window_state) {
+  // From now on, we can use the default session restore mechanism again.
+  SetWindowRestoreOverrides(window_state->window(), gfx::Rect(),
+                            ui::SHOW_STATE_NORMAL);
+  window_state->set_can_be_dragged(true);
+}
+
+void TabletModeWindowState::UpdateWindow(wm::WindowState* window_state,
+                                         wm::WindowStateType target_state,
+                                         bool animated) {
+  DCHECK(target_state == wm::WINDOW_STATE_TYPE_MINIMIZED ||
+         target_state == wm::WINDOW_STATE_TYPE_MAXIMIZED ||
+         target_state == wm::WINDOW_STATE_TYPE_PINNED ||
+         target_state == wm::WINDOW_STATE_TYPE_TRUSTED_PINNED ||
+         (target_state == wm::WINDOW_STATE_TYPE_NORMAL &&
+          !window_state->CanMaximize()) ||
+         target_state == wm::WINDOW_STATE_TYPE_FULLSCREEN);
+
+  if (current_state_type_ == target_state) {
+    if (target_state == wm::WINDOW_STATE_TYPE_MINIMIZED)
+      return;
+    // If the state type did not change, update it accordingly.
+    UpdateBounds(window_state, animated);
+    return;
+  }
+
+  const wm::WindowStateType old_state_type = current_state_type_;
+  current_state_type_ = target_state;
+  window_state->UpdateWindowPropertiesFromStateType();
+  window_state->NotifyPreStateTypeChange(old_state_type);
+
+  if (target_state == wm::WINDOW_STATE_TYPE_MINIMIZED) {
+    ::wm::SetWindowVisibilityAnimationType(
+        window_state->window(), wm::WINDOW_VISIBILITY_ANIMATION_TYPE_MINIMIZE);
+    window_state->window()->Hide();
+    if (window_state->IsActive())
+      window_state->Deactivate();
+  } else {
+    UpdateBounds(window_state, animated);
+  }
+
+  window_state->NotifyPostStateTypeChange(old_state_type);
+
+  if (old_state_type == wm::WINDOW_STATE_TYPE_PINNED ||
+      target_state == wm::WINDOW_STATE_TYPE_PINNED ||
+      old_state_type == wm::WINDOW_STATE_TYPE_TRUSTED_PINNED ||
+      target_state == wm::WINDOW_STATE_TYPE_TRUSTED_PINNED) {
+    Shell::Get()->screen_pinning_controller()->SetPinnedWindow(
+        WmWindow::Get(window_state->window()));
+  }
+
+  if ((window_state->window()->layer()->GetTargetVisibility() ||
+       old_state_type == wm::WINDOW_STATE_TYPE_MINIMIZED) &&
+      !window_state->window()->layer()->visible()) {
+    // The layer may be hidden if the window was previously minimized. Make
+    // sure it's visible.
+    window_state->window()->Show();
+  }
+}
+
+wm::WindowStateType TabletModeWindowState::GetMaximizedOrCenteredWindowType(
+    wm::WindowState* window_state) {
+  return window_state->CanMaximize() ? wm::WINDOW_STATE_TYPE_MAXIMIZED
+                                     : wm::WINDOW_STATE_TYPE_NORMAL;
+}
+
+void TabletModeWindowState::UpdateBounds(wm::WindowState* window_state,
+                                         bool animated) {
+  if (defer_bounds_updates_)
+    return;
+  gfx::Rect bounds_in_parent = GetBoundsInMaximizedMode(window_state);
+  // If we have a target bounds rectangle, we center it and set it
+  // accordingly.
+  if (!bounds_in_parent.IsEmpty() &&
+      bounds_in_parent != window_state->window()->bounds()) {
+    if (current_state_type_ == wm::WINDOW_STATE_TYPE_MINIMIZED ||
+        !window_state->window()->IsVisible() || !animated) {
+      window_state->SetBoundsDirect(bounds_in_parent);
+    } else {
+      // If we animate (to) tablet mode, we want to use the cross fade to
+      // avoid flashing.
+      if (window_state->IsMaximized())
+        window_state->SetBoundsDirectCrossFade(bounds_in_parent);
+      else
+        window_state->SetBoundsDirectAnimated(bounds_in_parent);
+    }
+  }
+}
+
+}  // namespace ash