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

/*
 * Copyright (C) 2007 Apple Computer, Inc.  All rights reserved.
 * Copyright (C) 2010 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 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
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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#include "third_party/blink/renderer/core/editing/commands/remove_format_command.h"

#include "third_party/blink/renderer/core/css/css_property_value_set.h"
#include "third_party/blink/renderer/core/css_value_keywords.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/editing/commands/apply_style_command.h"
#include "third_party/blink/renderer/core/editing/editing_style.h"
#include "third_party/blink/renderer/core/editing/frame_selection.h"
#include "third_party/blink/renderer/core/editing/visible_selection.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/html_names.h"

namespace blink {

RemoveFormatCommand::RemoveFormatCommand(Document& document)
    : CompositeEditCommand(document) {}

static bool IsElementForRemoveFormatCommand(const Element* element) {
  DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, elements,
                      ({
                          html_names::kAcronymTag, html_names::kBTag,
                          html_names::kBdoTag,     html_names::kBigTag,
                          html_names::kCiteTag,    html_names::kCodeTag,
                          html_names::kDfnTag,     html_names::kEmTag,
                          html_names::kFontTag,    html_names::kITag,
                          html_names::kInsTag,     html_names::kKbdTag,
                          html_names::kNobrTag,    html_names::kQTag,
                          html_names::kSTag,       html_names::kSampTag,
                          html_names::kSmallTag,   html_names::kStrikeTag,
                          html_names::kStrongTag,  html_names::kSubTag,
                          html_names::kSupTag,     html_names::kTtTag,
                          html_names::kUTag,       html_names::kVarTag,
                      }));
  return elements.Contains(element->TagQName());
}

void RemoveFormatCommand::DoApply(EditingState* editing_state) {
  DCHECK(!GetDocument().NeedsLayoutTreeUpdate());

  // TODO(editing-dev): Stop accessing FrameSelection in edit commands.
  LocalFrame* frame = GetDocument().GetFrame();
  const VisibleSelection selection =
      frame->Selection().ComputeVisibleSelectionInDOMTree();
  if (selection.IsNone() || !selection.IsValidFor(GetDocument()))
    return;

  // Get the default style for this editable root, it's the style that we'll
  // give the content that we're operating on.
  Element* root = selection.RootEditableElement();
  EditingStyle* default_style = MakeGarbageCollected<EditingStyle>(root);

  // We want to remove everything but transparent background.
  // FIXME: We shouldn't access style().
  default_style->Style()->SetProperty(CSSPropertyID::kBackgroundColor,
                                      CSSValueID::kTransparent);

  ApplyCommandToComposite(MakeGarbageCollected<ApplyStyleCommand>(
                              GetDocument(), default_style,
                              IsElementForRemoveFormatCommand, GetInputType()),
                          editing_state);
}

InputEvent::InputType RemoveFormatCommand::GetInputType() const {
  return InputEvent::InputType::kFormatRemove;
}

}  // namespace blink