third_party/WebKit/Source/core/exported/WebRange.cpp

/*
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#include "public/web/WebRange.h"

#include "core/dom/Document.h"
#include "core/dom/Range.h"
#include "core/editing/EphemeralRange.h"
#include "core/editing/FrameSelection.h"
#include "core/editing/PlainTextRange.h"
#include "core/editing/VisibleSelection.h"
#include "core/frame/LocalFrame.h"

namespace blink {

WebRange::WebRange(int start, int length)
    : start_(start), end_(start + length) {
  DCHECK(start != -1 || length != 0)
      << "These values are reserved to indicate that the range is null";
}

WebRange::WebRange(const EphemeralRange& range) {
  if (range.IsNull())
    return;

  start_ = range.StartPosition().ComputeOffsetInContainerNode();
  end_ = range.EndPosition().ComputeOffsetInContainerNode();
}

WebRange::WebRange(const PlainTextRange& range) {
  if (range.IsNull())
    return;

  start_ = range.Start();
  end_ = range.End();
}

EphemeralRange WebRange::CreateEphemeralRange(LocalFrame* frame) const {
  // TODO(editing-dev): The use of VisibleSelection should be audited. See
  // crbug.com/657237 for details.
  Element* selection_root = frame->Selection()
                                .ComputeVisibleSelectionInDOMTree()
                                .RootEditableElement();
  ContainerNode* scope =
      selection_root ? selection_root : frame->GetDocument()->documentElement();

  return PlainTextRange(start_, end_).CreateRange(*scope);
}

}  // namespace blink