Source/WebCore/editing/WritingToolsCompositionCommand.cpp

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#include "config.h"
#include "WritingToolsCompositionCommand.h"

#include "FrameSelection.h"
#include "ReplaceSelectionCommand.h"
#include "TextIterator.h"

namespace WebCore {

WritingToolsCompositionCommand::WritingToolsCompositionCommand(Ref<Document>&& document, const SimpleRange& endingContextRange)
    : CompositeEditCommand(WTF::move(document), EditAction::InsertReplacement)
    , m_endingContextRange(endingContextRange)
    , m_currentContextRange(endingContextRange)
{
}

void WritingToolsCompositionCommand::replaceContentsOfRangeWithFragment(RefPtr<DocumentFragment>&& fragment, const SimpleRange& range, MatchStyle matchStyle, State state)
{
    auto contextRange = m_endingContextRange;

    auto contextRangeCount = characterCount(contextRange);
    auto resolvedCharacterRange = characterRange(contextRange, range);

    OptionSet<ReplaceSelectionCommand::CommandOption> options { ReplaceSelectionCommand::PreventNesting, ReplaceSelectionCommand::SanitizeFragment, ReplaceSelectionCommand::SelectReplacement };
    if (matchStyle == MatchStyle::Yes)
        options.add(ReplaceSelectionCommand::MatchStyle);

    applyCommandToComposite(ReplaceSelectionCommand::create(document(), WTF::move(fragment), options, EditAction::InsertReplacement), range);

    // Restore the context range to what it previously was, while taking into account the newly replaced contents.
    auto newContextRange = rangeExpandedAroundRangeByCharacters(endingSelection(), resolvedCharacterRange.location, contextRangeCount - (resolvedCharacterRange.location + resolvedCharacterRange.length));
    if (!newContextRange) {
        ASSERT_NOT_REACHED();
        return;
    }

    m_currentContextRange = *newContextRange;

    if (state == State::Complete) {
        // When the command is signaled to be "complete", this commits the entire command as a whole to the undo/redo stack.
        commit();
    }
}

void WritingToolsCompositionCommand::commit()
{
    this->apply();
    m_endingContextRange = m_currentContextRange;
}

} // namespace WebCore