Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 91 insertions, 0 deletions

diff --git a/chrome/views/external_focus_tracker.cc b/chrome/views/external_focus_tracker.cc
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+++ b/chrome/views/external_focus_tracker.cc
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "chrome/views/external_focus_tracker.h"
+
+#include "chrome/views/view.h"
+#include "chrome/views/view_storage.h"
+
+namespace ChromeViews {
+
+ExternalFocusTracker::ExternalFocusTracker(
+    ChromeViews::View* parent_view, ChromeViews::FocusManager* focus_manager)
+    : focus_manager_(focus_manager),
+      parent_view_(parent_view) {
+  view_storage_ = ChromeViews::ViewStorage::GetSharedInstance();
+  last_focused_view_storage_id_ = view_storage_->CreateStorageID();
+  // Store the view which is focused when we're created.
+  StartTracking();
+}
+
+ExternalFocusTracker::~ExternalFocusTracker() {
+  view_storage_->RemoveView(last_focused_view_storage_id_);
+  if (focus_manager_)
+    focus_manager_->RemoveFocusChangeListener(this);
+}
+
+void ExternalFocusTracker::FocusWillChange(View* focused_before,
+                                           View* focused_now) {
+  if (focused_now && !parent_view_->IsParentOf(focused_now) &&
+      parent_view_ != focused_now) {
+    // Store the newly focused view.
+    StoreLastFocusedView(focused_now);
+  }
+}
+
+void ExternalFocusTracker::FocusLastFocusedExternalView() {
+  View* last_focused_view =
+      view_storage_->RetrieveView(last_focused_view_storage_id_);
+  if (last_focused_view)
+    last_focused_view->RequestFocus();
+}
+
+void ExternalFocusTracker::SetFocusManager(
+    ChromeViews::FocusManager* focus_manager) {
+  if (focus_manager_)
+    focus_manager_->RemoveFocusChangeListener(this);
+  focus_manager_ = focus_manager;
+  if (focus_manager_)
+    StartTracking();
+}
+
+void ExternalFocusTracker::StoreLastFocusedView(View* view) {
+  view_storage_->RemoveView(last_focused_view_storage_id_);
+  // If the view is NULL, remove the last focused view from storage, but don't
+  // try to store NULL.
+  if (view != NULL)
+    view_storage_->StoreView(last_focused_view_storage_id_, view);
+}
+
+void ExternalFocusTracker::StartTracking() {
+  StoreLastFocusedView(focus_manager_->GetFocusedView());
+  focus_manager_->AddFocusChangeListener(this);
+}
+
+} // namespace