third_party/WebKit/Source/core/editing/commands/RemoveCSSPropertyCommand.cpp

/*
 * Copyright (C) 2005, 2008 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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#include "core/editing/commands/RemoveCSSPropertyCommand.h"

#include "bindings/core/v8/ExceptionStatePlaceholder.h"
#include "core/css/CSSStyleDeclaration.h"
#include "core/css/StylePropertySet.h"
#include "core/dom/Element.h"
#include "wtf/Assertions.h"

namespace blink {

RemoveCSSPropertyCommand::RemoveCSSPropertyCommand(Document& document,
                                                   Element* element,
                                                   CSSPropertyID property)
    : SimpleEditCommand(document),
      m_element(element),
      m_property(property),
      m_important(false) {
  DCHECK(m_element);
}

RemoveCSSPropertyCommand::~RemoveCSSPropertyCommand() {}

void RemoveCSSPropertyCommand::doApply(EditingState*) {
  const StylePropertySet* style = m_element->inlineStyle();
  if (!style)
    return;

  m_oldValue = style->getPropertyValue(m_property);
  m_important = style->propertyIsImportant(m_property);

  // Mutate using the CSSOM wrapper so we get the same event behavior as a
  // script. Setting to null string removes the property. We don't have internal
  // version of removeProperty.
  m_element->style()->setPropertyInternal(m_property, String(), String(), false,
                                          IGNORE_EXCEPTION);
}

void RemoveCSSPropertyCommand::doUnapply() {
  m_element->style()->setPropertyInternal(m_property, String(), m_oldValue,
                                          m_important, IGNORE_EXCEPTION);
}

DEFINE_TRACE(RemoveCSSPropertyCommand) {
  visitor->trace(m_element);
  SimpleEditCommand::trace(visitor);
}

}  // namespace blink