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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "core/editing/commands/UndoStep.h"
#include "core/editing/Editor.h"
#include "core/editing/commands/EditCommand.h"
namespace blink {
UndoStep* UndoStep::create(Document* document,
const VisibleSelection& startingSelection,
const VisibleSelection& endingSelection,
InputEvent::InputType inputType) {
return new UndoStep(document, startingSelection, endingSelection, inputType);
}
UndoStep::UndoStep(Document* document,
const VisibleSelection& startingSelection,
const VisibleSelection& endingSelection,
InputEvent::InputType inputType)
: m_document(document),
m_startingSelection(startingSelection),
m_endingSelection(endingSelection),
m_startingRootEditableElement(startingSelection.rootEditableElement()),
m_endingRootEditableElement(endingSelection.rootEditableElement()),
m_inputType(inputType) {}
void UndoStep::unapply() {
DCHECK(m_document);
LocalFrame* frame = m_document->frame();
DCHECK(frame);
// Changes to the document may have been made since the last editing operation
// that require a layout, as in <rdar://problem/5658603>. Low level
// operations, like RemoveNodeCommand, don't require a layout because the high
// level operations that use them perform one if one is necessary (like for
// the creation of VisiblePositions).
m_document->updateStyleAndLayoutIgnorePendingStylesheets();
{
size_t size = m_commands.size();
for (size_t i = size; i; --i)
m_commands[i - 1]->doUnapply();
}
frame->editor().unappliedEditing(this);
}
void UndoStep::reapply() {
DCHECK(m_document);
LocalFrame* frame = m_document->frame();
DCHECK(frame);
// Changes to the document may have been made since the last editing operation
// that require a layout, as in <rdar://problem/5658603>. Low level
// operations, like RemoveNodeCommand, don't require a layout because the high
// level operations that use them perform one if one is necessary (like for
// the creation of VisiblePositions).
m_document->updateStyleAndLayoutIgnorePendingStylesheets();
{
for (const auto& command : m_commands)
command->doReapply();
}
frame->editor().reappliedEditing(this);
}
InputEvent::InputType UndoStep::inputType() const {
return m_inputType;
}
void UndoStep::append(SimpleEditCommand* command) {
m_commands.push_back(command);
}
void UndoStep::append(UndoStep* undoStep) {
m_commands.appendVector(undoStep->m_commands);
}
void UndoStep::setStartingSelection(const VisibleSelection& selection) {
m_startingSelection = selection;
m_startingRootEditableElement = selection.rootEditableElement();
}
void UndoStep::setEndingSelection(const VisibleSelection& selection) {
m_endingSelection = selection;
m_endingRootEditableElement = selection.rootEditableElement();
}
DEFINE_TRACE(UndoStep) {
visitor->trace(m_document);
visitor->trace(m_startingSelection);
visitor->trace(m_endingSelection);
visitor->trace(m_commands);
visitor->trace(m_startingRootEditableElement);
visitor->trace(m_endingRootEditableElement);
}
} // namespace blink
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