ui/views/ime/input_method_base.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/views/ime/input_method_base.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/base/ime/text_input_client.h"
   9 #include "ui/events/event.h"
  10 #include "ui/views/view.h"
  11 #include "ui/views/widget/widget.h"
  12
  13 namespace views {
  14
  15 InputMethodBase::InputMethodBase() : delegate_(NULL), widget_(NULL) {}
  16
  17 InputMethodBase::~InputMethodBase() {
  18   DetachFromWidget();
  19 }
  20
  21 void InputMethodBase::SetDelegate(internal::InputMethodDelegate* delegate) {
  22   DCHECK(delegate);
  23   delegate_ = delegate;
  24 }
  25
  26 void InputMethodBase::Init(Widget* widget) {
  27   DCHECK(widget);
  28   DCHECK(widget->GetFocusManager());
  29   DCHECK(!widget_) << "The input method is already initialized.";
  30
  31   widget_ = widget;
  32   // Alert the InputMethod of the Widget's currently focused view.
  33   View* focused = widget->GetFocusManager()->GetFocusedView();
  34   if (focused)
  35     OnWillChangeFocus(NULL, focused);
  36   widget->GetFocusManager()->AddFocusChangeListener(this);
  37 }
  38
  39 views::View* InputMethodBase::GetFocusedView() const {
  40   return widget_ ? widget_->GetFocusManager()->GetFocusedView() : NULL;
  41 }
  42
  43 void InputMethodBase::OnTextInputTypeChanged(View* view) {}
  44
  45 ui::TextInputClient* InputMethodBase::GetTextInputClient() const {
  46   return (widget_ && widget_->IsActive() && GetFocusedView()) ?
  47       GetFocusedView()->GetTextInputClient() : NULL;
  48 }
  49
  50 ui::TextInputType InputMethodBase::GetTextInputType() const {
  51   ui::TextInputClient* client = GetTextInputClient();
  52   return client ? client->GetTextInputType() : ui::TEXT_INPUT_TYPE_NONE;
  53 }
  54
  55 void InputMethodBase::OnWillChangeFocus(View* focused_before, View* focused) {}
  56
  57 void InputMethodBase::OnDidChangeFocus(View* focused_before, View* focused) {}
  58
  59 bool InputMethodBase::IsViewFocused(View* view) const {
  60   return widget_ && widget_->IsActive() && view && GetFocusedView() == view;
  61 }
  62
  63 bool InputMethodBase::IsTextInputTypeNone() const {
  64   return GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE;
  65 }
  66
  67 void InputMethodBase::OnInputMethodChanged() const {
  68   ui::TextInputClient* client = GetTextInputClient();
  69   if (client && client->GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE)
  70     client->OnInputMethodChanged();
  71 }
  72
  73 void InputMethodBase::DispatchKeyEventPostIME(const ui::KeyEvent& key) const {
  74   if (delegate_)
  75     delegate_->DispatchKeyEventPostIME(key);
  76 }
  77
  78 bool InputMethodBase::GetCaretBoundsInWidget(gfx::Rect* rect) const {
  79   DCHECK(rect);
  80   ui::TextInputClient* client = GetTextInputClient();
  81   if (!client || client->GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE)
  82     return false;
  83
  84   gfx::Rect caret_bounds = client->GetCaretBounds();
  85   gfx::Point caret_origin = caret_bounds.origin();
  86   View::ConvertPointFromScreen(GetFocusedView(), &caret_origin);
  87   caret_bounds.set_origin(caret_origin);
  88   *rect = GetFocusedView()->ConvertRectToWidget(caret_bounds);
  89
  90   // Convert coordinates if the focused view is inside a child Widget.
  91   if (GetFocusedView()->GetWidget() != widget_)
  92     return Widget::ConvertRect(GetFocusedView()->GetWidget(), widget_, rect);
  93   return true;
  94 }
  95
  96 void InputMethodBase::DetachFromWidget() {
  97   if (!widget_)
  98     return;
  99
 100   widget_->GetFocusManager()->RemoveFocusChangeListener(this);
 101   widget_ = NULL;
 102 }
 103
 104 }  // namespace views