Revert "views: Move widget/ directory to ui/views." properly.

Review URL: http://codereview.chromium.org/8562003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110960 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 455 insertions, 0 deletions

diff --git a/views/widget/root_view.cc b/views/widget/root_view.cc
new file mode 100644
index 0000000..2682bfc
--- /dev/null
+++ b/views/widget/root_view.cc
@@ -0,0 +1,455 @@
+// 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 "views/widget/root_view.h"
+
+#include <algorithm>
+
+#include "base/logging.h"
+#include "base/message_loop.h"
+#include "ui/base/accessibility/accessible_view_state.h"
+#include "ui/base/dragdrop/drag_drop_types.h"
+#include "ui/base/keycodes/keyboard_codes.h"
+#include "ui/gfx/canvas_skia.h"
+#include "ui/gfx/compositor/layer.h"
+#include "ui/views/focus/view_storage.h"
+#include "ui/views/layout/fill_layout.h"
+#include "ui/views/touchui/gesture_manager.h"
+#include "views/widget/widget.h"
+
+namespace views {
+namespace internal {
+
+// static
+const char RootView::kViewClassName[] = "views/RootView";
+
+////////////////////////////////////////////////////////////////////////////////
+// RootView, public:
+
+// Creation and lifetime -------------------------------------------------------
+
+RootView::RootView(Widget* widget)
+    : widget_(widget),
+      mouse_pressed_handler_(NULL),
+      mouse_move_handler_(NULL),
+      last_click_handler_(NULL),
+      explicit_mouse_handler_(false),
+      last_mouse_event_flags_(0),
+      last_mouse_event_x_(-1),
+      last_mouse_event_y_(-1),
+      gesture_manager_(GestureManager::GetInstance()),
+      touch_pressed_handler_(NULL),
+      ALLOW_THIS_IN_INITIALIZER_LIST(focus_search_(this, false, false)),
+      focus_traversable_parent_(NULL),
+      focus_traversable_parent_view_(NULL) {
+}
+
+RootView::~RootView() {
+  // If we have children remove them explicitly so to make sure a remove
+  // notification is sent for each one of them.
+  if (has_children())
+    RemoveAllChildViews(true);
+}
+
+// Tree operations -------------------------------------------------------------
+
+void RootView::SetContentsView(View* contents_view) {
+  DCHECK(contents_view && GetWidget()->native_widget()) <<
+      "Can't be called until after the native widget is created!";
+  // The ContentsView must be set up _after_ the window is created so that its
+  // Widget pointer is valid.
+  SetLayoutManager(new FillLayout);
+  if (has_children())
+    RemoveAllChildViews(true);
+  AddChildView(contents_view);
+
+  // Force a layout now, since the attached hierarchy won't be ready for the
+  // containing window's bounds. Note that we call Layout directly rather than
+  // calling the widget's size changed handler, since the RootView's bounds may
+  // not have changed, which will cause the Layout not to be done otherwise.
+  Layout();
+}
+
+View* RootView::GetContentsView() {
+  return child_count() > 0 ? child_at(0) : NULL;
+}
+
+void RootView::NotifyNativeViewHierarchyChanged(bool attached,
+                                                gfx::NativeView native_view) {
+  PropagateNativeViewHierarchyChanged(attached, native_view, this);
+}
+
+// Input -----------------------------------------------------------------------
+
+bool RootView::OnKeyEvent(const KeyEvent& event) {
+  bool consumed = false;
+
+  View* v = GetFocusManager()->GetFocusedView();
+  // Special case to handle right-click context menus triggered by the
+  // keyboard.
+  if (v && v->IsEnabled() && ((event.key_code() == ui::VKEY_APPS) ||
+     (event.key_code() == ui::VKEY_F10 && event.IsShiftDown()))) {
+    v->ShowContextMenu(v->GetKeyboardContextMenuLocation(), false);
+    return true;
+  }
+  for (; v && v != this && !consumed; v = v->parent()) {
+    consumed = (event.type() == ui::ET_KEY_PRESSED) ?
+        v->OnKeyPressed(event) : v->OnKeyReleased(event);
+  }
+  return consumed;
+}
+
+// Focus -----------------------------------------------------------------------
+
+void RootView::SetFocusTraversableParent(FocusTraversable* focus_traversable) {
+  DCHECK(focus_traversable != this);
+  focus_traversable_parent_ = focus_traversable;
+}
+
+void RootView::SetFocusTraversableParentView(View* view) {
+  focus_traversable_parent_view_ = view;
+}
+
+// System events ---------------------------------------------------------------
+
+void RootView::ThemeChanged() {
+  View::PropagateThemeChanged();
+}
+
+void RootView::LocaleChanged() {
+  View::PropagateLocaleChanged();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// RootView, FocusTraversable implementation:
+
+FocusSearch* RootView::GetFocusSearch() {
+  return &focus_search_;
+}
+
+FocusTraversable* RootView::GetFocusTraversableParent() {
+  return focus_traversable_parent_;
+}
+
+View* RootView::GetFocusTraversableParentView() {
+  return focus_traversable_parent_view_;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// RootView, View overrides:
+
+const Widget* RootView::GetWidget() const {
+  return widget_;
+}
+
+Widget* RootView::GetWidget() {
+  return const_cast<Widget*>(const_cast<const RootView*>(this)->GetWidget());
+}
+
+bool RootView::IsVisibleInRootView() const {
+  return IsVisible();
+}
+
+std::string RootView::GetClassName() const {
+  return kViewClassName;
+}
+
+void RootView::SchedulePaintInRect(const gfx::Rect& rect) {
+  if (layer()) {
+    layer()->SchedulePaint(rect);
+  } else {
+    gfx::Rect xrect = ConvertRectToParent(rect);
+    gfx::Rect invalid_rect = GetLocalBounds().Intersect(xrect);
+    if (!invalid_rect.IsEmpty())
+      widget_->SchedulePaintInRect(invalid_rect);
+  }
+}
+
+bool RootView::OnMousePressed(const MouseEvent& event) {
+  MouseEvent e(event, this);
+  UpdateCursor(e);
+  SetMouseLocationAndFlags(e);
+
+  // If mouse_pressed_handler_ is non null, we are currently processing
+  // a pressed -> drag -> released session. In that case we send the
+  // event to mouse_pressed_handler_
+  if (mouse_pressed_handler_) {
+    MouseEvent mouse_pressed_event(e, this, mouse_pressed_handler_);
+    drag_info.Reset();
+    mouse_pressed_handler_->ProcessMousePressed(mouse_pressed_event,
+                                                &drag_info);
+    return true;
+  }
+  DCHECK(!explicit_mouse_handler_);
+
+  bool hit_disabled_view = false;
+  // Walk up the tree until we find a view that wants the mouse event.
+  for (mouse_pressed_handler_ = GetEventHandlerForPoint(e.location());
+       mouse_pressed_handler_ && (mouse_pressed_handler_ != this);
+       mouse_pressed_handler_ = mouse_pressed_handler_->parent()) {
+    if (!mouse_pressed_handler_->IsEnabled()) {
+      // Disabled views should eat events instead of propagating them upwards.
+      hit_disabled_view = true;
+      break;
+    }
+
+    // See if this view wants to handle the mouse press.
+    MouseEvent mouse_pressed_event(e, this, mouse_pressed_handler_);
+
+    // Remove the double-click flag if the handler is different than the
+    // one which got the first click part of the double-click.
+    if (mouse_pressed_handler_ != last_click_handler_)
+      mouse_pressed_event.set_flags(e.flags() & ~ui::EF_IS_DOUBLE_CLICK);
+
+    drag_info.Reset();
+    bool handled = mouse_pressed_handler_->ProcessMousePressed(
+        mouse_pressed_event, &drag_info);
+
+    // The view could have removed itself from the tree when handling
+    // OnMousePressed().  In this case, the removal notification will have
+    // reset mouse_pressed_handler_ to NULL out from under us.  Detect this
+    // case and stop.  (See comments in view.h.)
+    //
+    // NOTE: Don't return true here, because we don't want the frame to
+    // forward future events to us when there's no handler.
+    if (!mouse_pressed_handler_)
+      break;
+
+    // If the view handled the event, leave mouse_pressed_handler_ set and
+    // return true, which will cause subsequent drag/release events to get
+    // forwarded to that view.
+    if (handled) {
+      last_click_handler_ = mouse_pressed_handler_;
+      return true;
+    }
+  }
+
+  // Reset mouse_pressed_handler_ to indicate that no processing is occurring.
+  mouse_pressed_handler_ = NULL;
+
+  // In the event that a double-click is not handled after traversing the
+  // entire hierarchy (even as a single-click when sent to a different view),
+  // it must be marked as handled to avoid anything happening from default
+  // processing if it the first click-part was handled by us.
+  if (last_click_handler_ && e.flags() & ui::EF_IS_DOUBLE_CLICK)
+    hit_disabled_view = true;
+
+  last_click_handler_ = NULL;
+  return hit_disabled_view;
+}
+
+bool RootView::OnMouseDragged(const MouseEvent& event) {
+  MouseEvent e(event, this);
+  UpdateCursor(e);
+
+  if (mouse_pressed_handler_) {
+    SetMouseLocationAndFlags(e);
+
+    MouseEvent mouse_event(e, this, mouse_pressed_handler_);
+    return mouse_pressed_handler_->ProcessMouseDragged(mouse_event, &drag_info);
+  }
+  return false;
+}
+
+void RootView::OnMouseReleased(const MouseEvent& event) {
+  MouseEvent e(event, this);
+  UpdateCursor(e);
+
+  if (mouse_pressed_handler_) {
+    MouseEvent mouse_released(e, this, mouse_pressed_handler_);
+    // We allow the view to delete us from ProcessMouseReleased. As such,
+    // configure state such that we're done first, then call View.
+    View* mouse_pressed_handler = mouse_pressed_handler_;
+    SetMouseHandler(NULL);
+    mouse_pressed_handler->ProcessMouseReleased(mouse_released);
+    // WARNING: we may have been deleted.
+  }
+}
+
+void RootView::OnMouseCaptureLost() {
+  if (mouse_pressed_handler_) {
+    // Synthesize a release event for UpdateCursor.
+    MouseEvent release_event(ui::ET_MOUSE_RELEASED, last_mouse_event_x_,
+                             last_mouse_event_y_, last_mouse_event_flags_);
+    UpdateCursor(release_event);
+    // We allow the view to delete us from OnMouseCaptureLost. As such,
+    // configure state such that we're done first, then call View.
+    View* mouse_pressed_handler = mouse_pressed_handler_;
+    SetMouseHandler(NULL);
+    mouse_pressed_handler->OnMouseCaptureLost();
+    // WARNING: we may have been deleted.
+  }
+}
+
+void RootView::OnMouseMoved(const MouseEvent& event) {
+  MouseEvent e(event, this);
+  View* v = GetEventHandlerForPoint(e.location());
+  // Find the first enabled view, or the existing move handler, whichever comes
+  // first.  The check for the existing handler is because if a view becomes
+  // disabled while handling moves, it's wrong to suddenly send ET_MOUSE_EXITED
+  // and ET_MOUSE_ENTERED events, because the mouse hasn't actually exited yet.
+  while (v && !v->IsEnabled() && (v != mouse_move_handler_))
+    v = v->parent();
+  if (v && v != this) {
+    if (v != mouse_move_handler_) {
+      if (mouse_move_handler_ != NULL)
+        mouse_move_handler_->OnMouseExited(e);
+      mouse_move_handler_ = v;
+      MouseEvent entered_event(e, this, mouse_move_handler_);
+      mouse_move_handler_->OnMouseEntered(entered_event);
+    }
+    MouseEvent moved_event(e, this, mouse_move_handler_);
+    mouse_move_handler_->OnMouseMoved(moved_event);
+    if (!(moved_event.flags() & ui::EF_IS_NON_CLIENT))
+      widget_->SetCursor(mouse_move_handler_->GetCursor(moved_event));
+  } else if (mouse_move_handler_ != NULL) {
+    mouse_move_handler_->OnMouseExited(e);
+    widget_->SetCursor(gfx::kNullCursor);
+  }
+}
+
+void RootView::OnMouseExited(const MouseEvent& event) {
+  if (mouse_move_handler_ != NULL) {
+    mouse_move_handler_->OnMouseExited(event);
+    mouse_move_handler_ = NULL;
+  }
+}
+
+bool RootView::OnMouseWheel(const MouseWheelEvent& event) {
+  MouseWheelEvent e(event, this);
+  bool consumed = false;
+  for (View* v = GetFocusManager()->GetFocusedView();
+       v && v != this && !consumed; v = v->parent())
+    consumed = v->OnMouseWheel(e);
+  return consumed;
+}
+
+ui::TouchStatus RootView::OnTouchEvent(const TouchEvent& event) {
+  TouchEvent e(event, this);
+
+  // If touch_pressed_handler_ is non null, we are currently processing
+  // a touch down on the screen situation. In that case we send the
+  // event to touch_pressed_handler_
+  ui::TouchStatus status = ui::TOUCH_STATUS_UNKNOWN;
+
+  if (touch_pressed_handler_) {
+    TouchEvent touch_event(e, this, touch_pressed_handler_);
+    status = touch_pressed_handler_->ProcessTouchEvent(touch_event);
+    if (gesture_manager_->ProcessTouchEventForGesture(e, this, status))
+      status = ui::TOUCH_STATUS_SYNTH_MOUSE;
+    if (status == ui::TOUCH_STATUS_END)
+      touch_pressed_handler_ = NULL;
+    return status;
+  }
+
+  // Walk up the tree until we find a view that wants the touch event.
+  for (touch_pressed_handler_ = GetEventHandlerForPoint(e.location());
+       touch_pressed_handler_ && (touch_pressed_handler_ != this);
+       touch_pressed_handler_ = touch_pressed_handler_->parent()) {
+    if (!touch_pressed_handler_->IsEnabled()) {
+      // Disabled views eat events but are treated as not handled by the
+      // the GestureManager.
+      status = ui::TOUCH_STATUS_UNKNOWN;
+      break;
+    }
+
+    // See if this view wants to handle the touch
+    TouchEvent touch_event(e, this, touch_pressed_handler_);
+    status = touch_pressed_handler_->ProcessTouchEvent(touch_event);
+
+    // The view could have removed itself from the tree when handling
+    // OnTouchEvent(). So handle as per OnMousePressed. NB: we
+    // assume that the RootView itself cannot be so removed.
+    if (!touch_pressed_handler_)
+      break;
+
+    // The touch event wasn't processed. Go up the view hierarchy and dispatch
+    // the touch event.
+    if (status == ui::TOUCH_STATUS_UNKNOWN)
+      continue;
+
+    // If the touch didn't initiate a touch-sequence, then reset the touch event
+    // handler. Otherwise, leave it set so that subsequent touch events are
+    // dispatched to the same handler.
+    if (status != ui::TOUCH_STATUS_START)
+      touch_pressed_handler_ = NULL;
+
+    if (gesture_manager_->ProcessTouchEventForGesture(e, this, status))
+      status = ui::TOUCH_STATUS_SYNTH_MOUSE;
+    return status;
+  }
+
+  // Reset touch_pressed_handler_ to indicate that no processing is occurring.
+  touch_pressed_handler_ = NULL;
+
+  // Give the touch event to the gesture manager.
+  if (gesture_manager_->ProcessTouchEventForGesture(e, this, status))
+    status = ui::TOUCH_STATUS_SYNTH_MOUSE;
+  return status;
+}
+
+void RootView::SetMouseHandler(View *new_mh) {
+  // If we're clearing the mouse handler, clear explicit_mouse_handler_ as well.
+  explicit_mouse_handler_ = (new_mh != NULL);
+  mouse_pressed_handler_ = new_mh;
+}
+
+void RootView::GetAccessibleState(ui::AccessibleViewState* state) {
+  state->role = ui::AccessibilityTypes::ROLE_APPLICATION;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// RootView, protected:
+
+void RootView::ViewHierarchyChanged(bool is_add, View* parent, View* child) {
+  widget_->ViewHierarchyChanged(is_add, parent, child);
+
+  if (!is_add) {
+    if (!explicit_mouse_handler_ && mouse_pressed_handler_ == child)
+      mouse_pressed_handler_ = NULL;
+    if (mouse_move_handler_ == child)
+      mouse_move_handler_ = NULL;
+    if (touch_pressed_handler_ == child)
+      touch_pressed_handler_ = NULL;
+  }
+}
+
+void RootView::OnPaint(gfx::Canvas* canvas) {
+  if (!layer() || !layer()->fills_bounds_opaquely())
+    canvas->GetSkCanvas()->drawColor(SK_ColorBLACK, SkXfermode::kClear_Mode);
+
+  // TODO (pkotwicz): Remove this once we switch over to Aura desktop.
+  // This is needed so that we can set the background behind the RWHV when the
+  // RWHV is not visible. Not needed once there is a view between the RootView
+  // and RWHV.
+  View::OnPaint(canvas);
+}
+
+void RootView::CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
+                                                  ui::Layer** layer_parent) {
+  View::CalculateOffsetToAncestorWithLayer(offset, layer_parent);
+  if (!layer())
+    widget_->CalculateOffsetToAncestorWithLayer(offset, layer_parent);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// RootView, private:
+
+// Input -----------------------------------------------------------------------
+
+void RootView::UpdateCursor(const MouseEvent& event) {
+  if (!(event.flags() & ui::EF_IS_NON_CLIENT)) {
+    View* v = GetEventHandlerForPoint(event.location());
+    widget_->SetCursor(v->GetCursor(MouseEvent(event, this, v)));
+  }
+}
+
+void RootView::SetMouseLocationAndFlags(const MouseEvent& event) {
+  last_mouse_event_flags_ = event.flags();
+  last_mouse_event_x_ = event.x();
+  last_mouse_event_y_ = event.y();
+}
+
+}  // namespace internal
+}  // namespace views