New InputMethod api for Views.

views/ime/input_method_base.cc

+// 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/ime/input_method_base.h"
+#include "views/view.h"
+#include "views/widget/widget.h"
+
+#include "base/logging.h"
+
+namespace views {
+
+InputMethodBase::InputMethodBase()
+    : delegate_(NULL),
+      widget_(NULL),
+      focused_view_(NULL),
+      widget_focused_(false) {
+}
+
+InputMethodBase::~InputMethodBase() {
+  if (widget_) {
+    widget_->GetFocusManager()->RemoveFocusChangeListener(this);
+    widget_ = NULL;
+  }
+}
+
+void InputMethodBase::set_delegate(internal::InputMethodDelegate* delegate) {
+  DCHECK(delegate);
+  delegate_ = delegate;
+}
+
+void InputMethodBase::Init(Widget* widget) {
+  DCHECK(widget);
+  DCHECK(widget->GetFocusManager());
+
+  if (widget_) {
+    NOTREACHED() << "The input method is already initialized.";
+    return;
+  }
+
+  widget_ = widget;
+  widget->GetFocusManager()->AddFocusChangeListener(this);
+}
+
+void InputMethodBase::OnFocusIn() {
+  widget_focused_ = true;
+}
+
+void InputMethodBase::OnFocusOut() {
+  widget_focused_ = false;
+}
+
+void InputMethodBase::FocusWillChange(View* focused_before, View* focused) {
+  DCHECK_EQ(focused_view_, focused_before);
+  FocusedViewWillChange();
+  focused_view_ = focused;
+  FocusedViewDidChange();
+}
+
+bool InputMethodBase::IsViewFocused(View* view) const {
+  return widget_focused_ && view && focused_view_ == view;
+}
+
+TextInputClient* InputMethodBase::GetTextInputClient() const {
+  return (widget_focused_ && focused_view_) ?
+      focused_view_->GetTextInputClient() : NULL;
+}
+
+ui::TextInputType InputMethodBase::GetTextInputType() const {
+  TextInputClient* client = GetTextInputClient();
+  return client ? client->GetTextInputType() : ui::TEXT_INPUT_TYPE_NONE;
+}
+
+bool InputMethodBase::IsTextInputTypeNone() const {
+  return GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE;
+}
+
+void InputMethodBase::OnInputMethodChanged() const {
+  TextInputClient* client = GetTextInputClient();
+  if (client && client->GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE)
+    client->OnInputMethodChanged();
+}
+
+void InputMethodBase::DispatchKeyEventPostIME(const KeyEvent& key) const {
+  if (delegate_)
+    delegate_->DispatchKeyEventPostIME(key);
+}
+
+bool InputMethodBase::GetCaretBoundsInWidget(gfx::Rect* rect) const {
+  DCHECK(rect);
+  TextInputClient* client = GetTextInputClient();
+  if (!client || client->GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE)
+    return false;
+
+  *rect = client->GetCaretBounds();
+  gfx::Point origin = rect->origin();
+  gfx::Point end = gfx::Point(rect->right(), rect->bottom());
+
+  View::ConvertPointToWidget(focused_view_, &origin);
+  View::ConvertPointToWidget(focused_view_, &end);
+  rect->SetRect(origin.x(), origin.y(),
+                end.x() - origin.x(), end.y() - origin.y());
+
+  // We need to do coordinate conversion if the focused view is inside a child
+  // Widget.
+  if (focused_view_->GetWidget() != widget_)
+    return Widget::ConvertRect(focused_view_->GetWidget(), widget_, rect);
+  return true;
+}
+
+void InputMethodBase::FocusedViewWillChange() {
+}
+
+void InputMethodBase::FocusedViewDidChange() {
+}
+
+}  // namespace views