components/html_viewer/ime_controller.cc

   1 // Copyright 2015 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 "components/html_viewer/ime_controller.h"
   6
   7 #include "components/html_viewer/blink_input_events_type_converters.h"
   8 #include "components/html_viewer/blink_text_input_type_converters.h"
   9 #include "components/view_manager/public/cpp/view.h"
  10 #include "third_party/WebKit/public/web/WebInputEvent.h"
  11 #include "third_party/WebKit/public/web/WebWidget.h"
  12
  13 namespace html_viewer {
  14
  15 ImeController::ImeController(mojo::View* view, blink::WebWidget* widget)
  16     : view_(view), widget_(widget) {
  17 }
  18
  19 ImeController::~ImeController() {}
  20
  21 void ImeController::ResetInputMethod() {
  22   // TODO(penghuang): Reset IME.
  23 }
  24
  25 void ImeController::DidHandleGestureEvent(const blink::WebGestureEvent& event,
  26                                           bool event_cancelled) {
  27   // Called when a gesture event is handled.
  28   if (event_cancelled)
  29     return;
  30
  31   if (event.type == blink::WebInputEvent::GestureTap) {
  32     const bool show_ime = true;
  33     UpdateTextInputState(show_ime);
  34   } else if (event.type == blink::WebInputEvent::GestureLongPress) {
  35     // Only show IME if the textfield contains text.
  36     const bool show_ime = !widget_->textInputInfo().value.isEmpty();
  37     UpdateTextInputState(show_ime);
  38   }
  39 }
  40
  41 void ImeController::DidUpdateTextOfFocusedElementByNonUserInput() {
  42   // Called when value of focused textfield gets dirty, e.g. value is
  43   // modified by script, not by user input.
  44   const bool show_ime = false;
  45   UpdateTextInputState(show_ime);
  46 }
  47
  48 void ImeController::ShowImeIfNeeded() {
  49   // Request the browser to show the IME for current input type.
  50   const bool show_ime = true;
  51   UpdateTextInputState(show_ime);
  52 }
  53
  54 void ImeController::UpdateTextInputState(bool show_ime) {
  55   blink::WebTextInputInfo new_info = widget_->textInputInfo();
  56   // Only show IME if the focused element is editable.
  57   show_ime = show_ime && new_info.type != blink::WebTextInputTypeNone;
  58   if (show_ime || text_input_info_ != new_info) {
  59     text_input_info_ = new_info;
  60     mojo::TextInputStatePtr state = mojo::TextInputState::New();
  61     state->type = mojo::ConvertTo<mojo::TextInputType>(new_info.type);
  62     state->flags = new_info.flags;
  63     state->text = mojo::String::From(new_info.value.utf8());
  64     state->selection_start = new_info.selectionStart;
  65     state->selection_end = new_info.selectionEnd;
  66     state->composition_start = new_info.compositionStart;
  67     state->composition_end = new_info.compositionEnd;
  68     if (show_ime)
  69       view_->SetImeVisibility(true, state.Pass());
  70     else
  71       view_->SetTextInputState(state.Pass());
  72   }
  73 }
  74
  75 }  // namespace html_viewer