text: // Copyright 2010-2021, Google Inc.
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #ifndef MOZC_RENDERER_WIN32_CANDIDATE_WINDOW_H_
  #define MOZC_RENDERER_WIN32_CANDIDATE_WINDOW_H_
  
  // clang-format off
  #include <windows.h>
  #define _ATL_NO_AUTOMATIC_NAMESPACE
  #define _WTL_NO_AUTOMATIC_NAMESPACE
  #include <atlbase.h>
  #include <atlwin.h>
  #include <atlapp.h>
  #include <atlcrack.h>
  #include <atlmisc.h>
  #include <atlgdi.h>
  // clang-format on
  
  #include <memory>
  #include <string>
  
  #include "base/const.h"
  #include "base/coordinates.h"
  #include "base/port.h"
  
  namespace mozc {
  
  namespace client {
  class SendCommandInterface;
  }  // namespace client
  
  namespace commands {
  class Candidates;
  }  // namespace commands
  
  namespace renderer {
  
  class TableLayout;
  
  namespace win32 {
  
  class TextRenderer;
  
  // As Discussed in b/2317702, UI windows are disabled by default because it is
  // hard for a user to find out what caused the problem than finding that the
  // operations seems to be disabled on the UI window when
  // SPI_GETACTIVEWINDOWTRACKING is enabled.
  // TODO(yukawa): Support mouse operations before we add a GUI feature which
  //   requires UI interaction by mouse and/or touch. (b/2954874)
  typedef ATL::CWinTraits<WS_POPUP | WS_DISABLED,
                          WS_EX_TOOLWINDOW | WS_EX_TOPMOST | WS_EX_NOACTIVATE>
      CandidateWindowTraits;
  
  // a class which implements an IME candidate window for Windows. This class
  // is derived from an ATL CWindowImpl<T> class, which provides methods for
  // creating a window and handling windows messages.
  class CandidateWindow : public ATL::CWindowImpl<CandidateWindow, ATL::CWindow,
                                                  CandidateWindowTraits> {
   public:
    DECLARE_WND_CLASS_EX(kCandidateWindowClassName, CS_SAVEBITS | CS_DROPSHADOW,
                         COLOR_WINDOW);
  
    BEGIN_MSG_MAP_EX(CandidateWindow)
    MSG_WM_CREATE(OnCreate)
    MSG_WM_DESTROY(OnDestroy)
    MSG_WM_ERASEBKGND(OnEraseBkgnd)
    MSG_WM_GETMINMAXINFO(OnGetMinMaxInfo)
    MSG_WM_LBUTTONDOWN(OnLButtonDown)
    MSG_WM_LBUTTONUP(OnLButtonUp)
    MSG_WM_MOUSEMOVE(OnMouseMove)
    MSG_WM_SETTINGCHANGE(OnSettingChange)
    MSG_WM_PAINT(OnPaint)
    MSG_WM_PRINTCLIENT(OnPrintClient)
    END_MSG_MAP()
  
    CandidateWindow();
    ~CandidateWindow();
    LRESULT OnCreate(LPCREATESTRUCT create_struct);
    void OnDestroy();
    BOOL OnEraseBkgnd(WTL::CDCHandle dc);
    void OnGetMinMaxInfo(MINMAXINFO *min_max_info);
    void OnLButtonDown(UINT nFlags, WTL::CPoint point);
    void OnLButtonUp(UINT nFlags, WTL::CPoint point);
    void OnMouseMove(UINT nFlags, WTL::CPoint point);
    void OnPaint(WTL::CDCHandle dc);
    void OnPrintClient(WTL::CDCHandle dc, UINT uFlags);
    void OnSettingChange(UINT uFlags, LPCTSTR lpszSection);
  
    void set_mouse_moving(bool moving);
  
    void UpdateLayout(const commands::Candidates &candidates);
    void SetSendCommandInterface(
        client::SendCommandInterface *send_command_interface);
  
    // Layout information for the WindowManager class.
    Size GetLayoutSize() const;
    Rect GetSelectionRectInScreenCord() const;
    Rect GetCandidateColumnInClientCord() const;
    Rect GetFirstRowInClientCord() const;
  
   private:
    void DoPaint(WTL::CDCHandle dc);
  
    void DrawCells(WTL::CDCHandle dc);
    void DrawVScrollBar(WTL::CDCHandle dc);
    void DrawShortcutBackground(WTL::CDCHandle dc);
    void DrawFooter(WTL::CDCHandle dc);
    void DrawSelectedRect(WTL::CDCHandle dc);
    void DrawInformationIcon(WTL::CDCHandle dc);
    void DrawBackground(WTL::CDCHandle dc);
    void DrawFrame(WTL::CDCHandle dc);
  
    // Handles candidate selection by mouse.
    void HandleMouseEvent(UINT nFlags, const WTL::CPoint &point,
                          bool close_candidatewindow);
  
    // Even though the candidate window supports limited mouse operations, we
    // accept them when and only when SPI_GETACTIVEWINDOWTRACKING is disabled
    // to avoid problematic side effect as discussed in b/2317702.
    void EnableOrDisableWindowForWorkaround();
  
    std::unique_ptr<commands::Candidates> candidates_;
    WTL::CBitmap footer_logo_;
    Size footer_logo_display_size_;
    client::SendCommandInterface *send_command_interface_;
    std::unique_ptr<TableLayout> table_layout_;
    std::unique_ptr<TextRenderer> text_renderer_;
    int indicator_width_;
    bool metrics_changed_;
    bool mouse_moving_;
  
    DISALLOW_COPY_AND_ASSIGN(CandidateWindow);
  };
  
  }  // namespace win32
  }  // namespace renderer
  }  // namespace mozc
  
  #endif  // MOZC_RENDERER_WIN32_CANDIDATE_WINDOW_H_
  