root/chrome/browser/ui/views/extensions/extension_view_views.cc

DEFINITIONS

1. is_clipped_
2. GetMinimumSize
3. SetVisible
4. GetCursor
5. ViewHierarchyChanged
6. DidStopLoading
7. SetIsClipped
8. ResizeDueToAutoResize
9. RenderViewCreated
10. HandleKeyboardEvent
11. SkipDefaultKeyEventProcessing
12. OnBoundsChanged
13. PreferredSizeChanged
14. OnFocus
15. CreateWidgetHostView
16. ShowIfCompletelyLoaded
17. CleanUp

// 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 "chrome/browser/ui/views/extensions/extension_view_views.h"

#include "chrome/browser/ui/views/extensions/extension_popup.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#include "extensions/browser/extension_host.h"
#include "extensions/common/view_type.h"
#include "ui/events/event.h"
#include "ui/views/widget/widget.h"

#if defined(USE_AURA)
#include "ui/base/cursor/cursor.h"
#endif

ExtensionViewViews::ExtensionViewViews(extensions::ExtensionHost* host,
                                       Browser* browser)
    : host_(host),
      browser_(browser),
      initialized_(false),
      container_(NULL),
      is_clipped_(false) {
  // This view needs to be focusable so it can act as the focused view for the
  // focus manager. This is required to have SkipDefaultKeyEventProcessing
  // called so the tab key events are forwarded to the renderer.
  SetFocusable(true);
}

ExtensionViewViews::~ExtensionViewViews() {
  if (parent())
    parent()->RemoveChildView(this);
  CleanUp();
}

gfx::Size ExtensionViewViews::GetMinimumSize() {
  // If the minimum size has never been set, returns the preferred size (same
  // behavior as views::View).
  return (minimum_size_ == gfx::Size()) ? GetPreferredSize() : minimum_size_;
}

void ExtensionViewViews::SetVisible(bool is_visible) {
  if (is_visible != visible()) {
    NativeViewHost::SetVisible(is_visible);

    // Also tell RenderWidgetHostView the new visibility. Despite its name, it
    // is not part of the View hierarchy and does not know about the change
    // unless we tell it.
    content::RenderWidgetHostView* host_view = render_view_host()->GetView();
    if (host_view) {
      if (is_visible)
        host_view->Show();
      else
        host_view->Hide();
    }
  }
}

gfx::NativeCursor ExtensionViewViews::GetCursor(const ui::MouseEvent& event) {
  return gfx::kNullCursor;
}

void ExtensionViewViews::ViewHierarchyChanged(
    const ViewHierarchyChangedDetails& details) {
  NativeViewHost::ViewHierarchyChanged(details);
  if (details.is_add && GetWidget() && !initialized_)
    CreateWidgetHostView();
}

void ExtensionViewViews::DidStopLoading() {
  ShowIfCompletelyLoaded();
}

void ExtensionViewViews::SetIsClipped(bool is_clipped) {
  if (is_clipped_ != is_clipped) {
    is_clipped_ = is_clipped;
    if (visible())
      ShowIfCompletelyLoaded();
  }
}

void ExtensionViewViews::ResizeDueToAutoResize(const gfx::Size& new_size) {
  // Don't actually do anything with this information until we have been shown.
  // Size changes will not be honored by lower layers while we are hidden.
  if (!visible()) {
    pending_preferred_size_ = new_size;
    return;
  }

  if (new_size != GetPreferredSize())
    SetPreferredSize(new_size);
}

void ExtensionViewViews::RenderViewCreated() {
  extensions::ViewType host_type = host_->extension_host_type();
  if (host_type == extensions::VIEW_TYPE_EXTENSION_POPUP) {
    render_view_host()->EnableAutoResize(
        gfx::Size(ExtensionPopup::kMinWidth, ExtensionPopup::kMinHeight),
        gfx::Size(ExtensionPopup::kMaxWidth, ExtensionPopup::kMaxHeight));
  }
}

void ExtensionViewViews::HandleKeyboardEvent(
    const content::NativeWebKeyboardEvent& event) {
  unhandled_keyboard_event_handler_.HandleKeyboardEvent(event,
                                                        GetFocusManager());
}

bool ExtensionViewViews::SkipDefaultKeyEventProcessing(const ui::KeyEvent& e) {
  // Let the tab key event be processed by the renderer (instead of moving the
  // focus to the next focusable view). Also handle Backspace, since otherwise
  // (on Windows at least), pressing Backspace, when focus is on a text field
  // within the ExtensionViewViews, will navigate the page back instead of
  // erasing a character.
  return (e.key_code() == ui::VKEY_TAB || e.key_code() == ui::VKEY_BACK);
}

void ExtensionViewViews::OnBoundsChanged(const gfx::Rect& previous_bounds) {
  // Propagate the new size to RenderWidgetHostView.
  // We can't send size zero because RenderWidget DCHECKs that.
  if (render_view_host()->GetView() && !bounds().IsEmpty())
    render_view_host()->GetView()->SetSize(size());
}

void ExtensionViewViews::PreferredSizeChanged() {
  View::PreferredSizeChanged();
  if (container_)
    container_->OnExtensionSizeChanged(this);
}

void ExtensionViewViews::OnFocus() {
  host()->host_contents()->GetView()->Focus();
}

void ExtensionViewViews::CreateWidgetHostView() {
  DCHECK(!initialized_);
  initialized_ = true;
  Attach(host_->host_contents()->GetView()->GetNativeView());
  host_->CreateRenderViewSoon();
  SetVisible(false);
}

void ExtensionViewViews::ShowIfCompletelyLoaded() {
  if (visible() || is_clipped_)
    return;

  // We wait to show the ExtensionViewViews until it has loaded, and the view
  // has actually been created. These can happen in different orders.
  if (host_->did_stop_loading()) {
    SetVisible(true);
    ResizeDueToAutoResize(pending_preferred_size_);
  }
}

void ExtensionViewViews::CleanUp() {
  if (!initialized_)
    return;
  if (native_view())
    Detach();
  initialized_ = false;
}