src/win32/tip/tip_range_util.h

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#ifndef MOZC_WIN32_TIP_TIP_RANGE_UTIL_H_
#define MOZC_WIN32_TIP_TIP_RANGE_UTIL_H_

#include <Windows.h>
#include <InputScope.h>
#include <msctf.h>

#include <string>
#include <vector>

#include "base/port.h"

namespace mozc {
namespace win32 {
namespace tsf {

// A utility class to handle ITfRange object.
class TipRangeUtil {
 public:
  // Sets the specified |range| into |context|.
  // Returns the general result code.
  static HRESULT SetSelection(
      ITfContext *context, TfEditCookie edit_cookie, ITfRange *range,
      TfActiveSelEnd active_sel_end);

  // Retrieves the default selection from |context| into |range|.
  // Returns the general result code.
  static HRESULT GetDefaultSelection(
      ITfContext *context, TfEditCookie edit_cookie, ITfRange **range,
      TfActiveSelEnd *active_sel_end);

  // Retrieves the text from |range| into |text|.
  // Returns the general result code.
  static HRESULT GetText(
      ITfRange *range, TfEditCookie edit_cookie, wstring *text);

  // Retrieves the input scopes from |range| into |input_scopes|.
  // Returns the general result code.
  static HRESULT GetInputScopes(ITfRange *range,
                                TfEditCookie read_cookie,
                                vector<InputScope> *input_scopes);

  // Checks whether or not |range_test| becomes a subset of |range_cover|.
  static bool IsRangeCovered(TfEditCookie edit_cookie,
                             ITfRange *range_test,
                             ITfRange *range_cover);

  // Returns the result of ITfContextView::GetTextExt with a workaround for a
  // TSF bug which prevents an IME from receiving TF_E_NOLAYOUT error code
  // correctly from ITfContextView::GetTextExt. The workaround may or may not
  // work depending on the attached application implements
  // ITextStoreACP::GetACPFromPoint.
  static HRESULT GetTextExt(ITfContextView *context_view,
                            TfEditCookie read_cookie,
                            ITfRange *range,
                            RECT *rect,
                            bool *clipped);

 private:
  DISALLOW_IMPLICIT_CONSTRUCTORS(TipRangeUtil);
};

}  // namespace tsf
}  // namespace win32
}  // namespace mozc

#endif  // MOZC_WIN32_TIP_TIP_RANGE_UTIL_H_