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 bool InputMethodBase::IsMock() const {
  56   return false;
  57 }
  58
  59 void InputMethodBase::OnWillChangeFocus(View* focused_before, View* focused) {}
  60
  61 void InputMethodBase::OnDidChangeFocus(View* focused_before, View* focused) {}
  62
  63 bool InputMethodBase::IsViewFocused(View* view) const {
  64   return widget_ && widget_->IsActive() && view && GetFocusedView() == view;
  65 }
  66
  67 bool InputMethodBase::IsTextInputTypeNone() const {
  68   return GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE;
  69 }
  70
  71 void InputMethodBase::OnInputMethodChanged() const {
  72   ui::TextInputClient* client = GetTextInputClient();
  73   if (client && client->GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE)
  74     client->OnInputMethodChanged();
  75 }
  76
  77 void InputMethodBase::DispatchKeyEventPostIME(const ui::KeyEvent& key) const {
  78   if (delegate_)
  79     delegate_->DispatchKeyEventPostIME(key);
  80 }
  81
  82 bool InputMethodBase::GetCaretBoundsInWidget(gfx::Rect* rect) const {
  83   DCHECK(rect);
  84   ui::TextInputClient* client = GetTextInputClient();
  85   if (!client || client->GetTextInputType() == ui::TEXT_INPUT_TYPE_NONE)
  86     return false;
  87
  88   gfx::Rect caret_bounds = client->GetCaretBounds();
  89   gfx::Point caret_origin = caret_bounds.origin();
  90   View::ConvertPointFromScreen(GetFocusedView(), &caret_origin);
  91   caret_bounds.set_origin(caret_origin);
  92   *rect = GetFocusedView()->ConvertRectToWidget(caret_bounds);
  93
  94   // Convert coordinates if the focused view is inside a child Widget.
  95   if (GetFocusedView()->GetWidget() != widget_)
  96     return Widget::ConvertRect(GetFocusedView()->GetWidget(), widget_, rect);
  97   return true;
  98 }
  99
 100 void InputMethodBase::DetachFromWidget() {
 101   if (!widget_)
 102     return;
 103
 104   widget_->GetFocusManager()->RemoveFocusChangeListener(this);
 105   widget_ = NULL;
 106 }
 107
 108 }  // namespace views