third_party/blink/renderer/core/html/forms/checkbox_input_type.cc

/*
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 * Copyright (C) 2011 Apple Inc. All rights reserved.
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#include "third_party/blink/renderer/core/html/forms/checkbox_input_type.h"

#include "third_party/blink/renderer/core/events/keyboard_event.h"
#include "third_party/blink/renderer/core/html/forms/html_input_element.h"
#include "third_party/blink/renderer/core/input_type_names.h"
#include "third_party/blink/renderer/platform/text/platform_locale.h"

namespace blink {

InputType* CheckboxInputType::Create(HTMLInputElement& element) {
  return MakeGarbageCollected<CheckboxInputType>(element);
}

const AtomicString& CheckboxInputType::FormControlType() const {
  return input_type_names::kCheckbox;
}

bool CheckboxInputType::ValueMissing(const String&) const {
  return GetElement().IsRequired() && !GetElement().checked();
}

String CheckboxInputType::ValueMissingText() const {
  return GetLocale().QueryString(
      WebLocalizedString::kValidationValueMissingForCheckbox);
}

void CheckboxInputType::HandleKeyupEvent(KeyboardEvent& event) {
  if (event.key() != " ")
    return;
  DispatchSimulatedClickIfActive(event);
}

ClickHandlingState* CheckboxInputType::WillDispatchClick() {
  // An event handler can use preventDefault or "return false" to reverse the
  // checking we do here.  The ClickHandlingState object contains what we need
  // to undo what we did here in didDispatchClick.

  ClickHandlingState* state = MakeGarbageCollected<ClickHandlingState>();

  state->checked = GetElement().checked();
  state->indeterminate = GetElement().indeterminate();

  if (state->indeterminate)
    GetElement().setIndeterminate(false);

  GetElement().setChecked(!state->checked, kDispatchChangeEvent);
  is_in_click_handler_ = true;
  return state;
}

void CheckboxInputType::DidDispatchClick(Event& event,
                                         const ClickHandlingState& state) {
  if (event.defaultPrevented() || event.DefaultHandled()) {
    GetElement().setIndeterminate(state.indeterminate);
    GetElement().setChecked(state.checked);
  } else {
    GetElement().DispatchInputAndChangeEventIfNeeded();
  }
  is_in_click_handler_ = false;
  // The work we did in willDispatchClick was default handling.
  event.SetDefaultHandled();
}

bool CheckboxInputType::ShouldAppearIndeterminate() const {
  return GetElement().indeterminate();
}

}  // namespace blink