chromium/src/third_party/blink/renderer/core/editing/commands/remove_css_property_command.cc

/*
 * Copyright (C) 2005, 2008 Apple Inc. All rights reserved.
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#include "third_party/blink/renderer/core/editing/commands/remove_css_property_command.h"

#include "third_party/blink/renderer/core/css/css_property_value_set.h"
#include "third_party/blink/renderer/core/css/css_style_declaration.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/wtf/assertions.h"

namespace blink {

RemoveCSSPropertyCommand::RemoveCSSPropertyCommand(Document& document,
                                                   Element* element,
                                                   CSSPropertyID property)
    : SimpleEditCommand(document),
      element_(element),
      property_(property),
      important_(false) {
  DCHECK(element_);
}

RemoveCSSPropertyCommand::~RemoveCSSPropertyCommand() = default;

void RemoveCSSPropertyCommand::DoApply(EditingState*) {
  const CSSPropertyValueSet* style = element_->InlineStyle();
  if (!style)
    return;

  old_value_ = style->GetPropertyValue(property_);
  important_ = style->PropertyIsImportant(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.
  element_->style()->SetPropertyInternal(
      property_, String(), String(), false,
      GetDocument().GetExecutionContext()->GetSecureContextMode(),
      IGNORE_EXCEPTION_FOR_TESTING);
}

void RemoveCSSPropertyCommand::DoUnapply() {
  element_->style()->SetPropertyInternal(
      property_, String(), old_value_, important_,
      GetDocument().GetExecutionContext()->GetSecureContextMode(),
      IGNORE_EXCEPTION_FOR_TESTING);
}

void RemoveCSSPropertyCommand::Trace(Visitor* visitor) const {
  visitor->Trace(element_);
  SimpleEditCommand::Trace(visitor);
}

}  // namespace blink