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

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 * Copyright (C) 2011 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
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 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
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 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "third_party/blink/renderer/core/html/forms/base_button_input_type.h"

#include "third_party/blink/renderer/core/dom/shadow_root.h"
#include "third_party/blink/renderer/core/dom/text.h"
#include "third_party/blink/renderer/core/html/forms/html_form_element.h"
#include "third_party/blink/renderer/core/html/forms/html_input_element.h"
#include "third_party/blink/renderer/core/html/parser/html_parser_idioms.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/core/layout/layout_button.h"

namespace blink {

using namespace html_names;

BaseButtonInputType::BaseButtonInputType(HTMLInputElement& element)
    : InputType(element), KeyboardClickableInputTypeView(element) {}

void BaseButtonInputType::Trace(Visitor* visitor) {
  KeyboardClickableInputTypeView::Trace(visitor);
  InputType::Trace(visitor);
}

InputTypeView* BaseButtonInputType::CreateView() {
  return this;
}

void BaseButtonInputType::CreateShadowSubtree() {
  DCHECK(GetElement().UserAgentShadowRoot());
  GetElement().UserAgentShadowRoot()->AppendChild(
      Text::Create(GetElement().GetDocument(), DisplayValue()));
}

void BaseButtonInputType::ValueAttributeChanged() {
  ToTextOrDie(GetElement().UserAgentShadowRoot()->firstChild())
      ->setData(DisplayValue());
}

String BaseButtonInputType::DisplayValue() const {
  return GetElement().ValueOrDefaultLabel().RemoveCharacters(IsHTMLLineBreak);
}

bool BaseButtonInputType::ShouldSaveAndRestoreFormControlState() const {
  return false;
}

void BaseButtonInputType::AppendToFormData(FormData&) const {}

LayoutObject* BaseButtonInputType::CreateLayoutObject(
    const ComputedStyle&) const {
  return new LayoutButton(&GetElement());
}

InputType::ValueMode BaseButtonInputType::GetValueMode() const {
  return ValueMode::kDefault;
}

void BaseButtonInputType::SetValue(const String& sanitized_value,
                                   bool,
                                   TextFieldEventBehavior,
                                   TextControlSetValueSelection) {
  GetElement().setAttribute(kValueAttr, AtomicString(sanitized_value));
}

bool BaseButtonInputType::MatchesDefaultPseudoClass() {
  // HTMLFormElement::findDefaultButton() traverses the tree. So we check
  // canBeSuccessfulSubmitButton() first for early return.
  return CanBeSuccessfulSubmitButton() && GetElement().Form() &&
         GetElement().Form()->FindDefaultButton() == &GetElement();
}

}  // namespace blink