src/renderer/win32/text_renderer.h

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#ifndef MOZC_RENDERER_WIN32_TEXT_RENDERER_H_
#define MOZC_RENDERER_WIN32_TEXT_RENDERER_H_

#include <windows.h>
#define _ATL_NO_AUTOMATIC_NAMESPACE
#define _WTL_NO_AUTOMATIC_NAMESPACE
#include <atlbase.h>
#include <atlapp.h>
#include <atlmisc.h>

#include <string>
#include <vector>

#include "base/coordinates.h"
#include "base/port.h"

namespace mozc {
namespace renderer {
namespace win32 {

// text-rect pair for batch text rendering.
struct TextRenderingInfo {
  wstring text;
  Rect rect;
  TextRenderingInfo(const wstring &str, const Rect &r) :
    text(str), rect(r) {
  }
};

// An interface which manages text rendering for Windows. This class
// is currently implemented with Win32 GDI functions.
class TextRenderer {
 public:
  // Text rendering styles for a candidate window
  enum FONT_TYPE {
    FONTSET_SHORTCUT = 0,
    FONTSET_CANDIDATE,
    FONTSET_DESCRIPTION,
    FONTSET_FOOTER_INDEX,
    FONTSET_FOOTER_LABEL,
    FONTSET_FOOTER_SUBLABEL,
    FONTSET_INFOLIST_CAPTION,
    FONTSET_INFOLIST_TITLE,
    FONTSET_INFOLIST_DESCRIPTION,
    SIZE_OF_FONT_TYPE,  // DO NOT DELETE THIS
  };

  // Returns an instance of TextRenderer. Caller takes ownership.
  static TextRenderer *Create();

  virtual ~TextRenderer();

  // Updates font cache.
  virtual void OnThemeChanged() = 0;

  // Retrieves the bounding box for a given string.
  virtual Size MeasureString(FONT_TYPE font_type, const wstring &str) const = 0;
  virtual Size MeasureStringMultiLine(FONT_TYPE font_type,
                                      const wstring &str,
                                      const int width) const = 0;
  // Renders the given |text|.
  virtual void RenderText(WTL::CDCHandle dc,
                          const wstring &text,
                          const Rect &rect,
                          FONT_TYPE font_type) const = 0;
  virtual void RenderTextList(WTL::CDCHandle dc,
                              const vector<TextRenderingInfo> &display_list,
                              FONT_TYPE font_type) const = 0;
};

}  // namespace win32
}  // namespace renderer
}  // namespace mozc
#endif  // MOZC_RENDERER_WIN32_TEXT_RENDERER_H_