clipboard.cc

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/*
  @copyright Steve Keen 2021
  @author Russell Standish
  This file is part of Minsky.

  Minsky is free software: you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  Minsky is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with Minsky.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "clipboard.h"

#ifdef _WIN32
#include <windows.h>
#else
#include "libclipboard.h"
#endif

using namespace std;

namespace minsky
{
  struct Clipboard::Impl
  {
#ifndef _WIN32
    clipboard_c* clipboard;
    Impl(): clipboard(clipboard_new(nullptr)) {}
    ~Impl() {clipboard_free(clipboard);}
#endif
  };

  Clipboard::Clipboard(): pimpl(make_shared<Impl>()) {}
  
  std::string Clipboard::getClipboard() const
  {
#if defined(_WIN32)
      string r;
      OpenClipboard(nullptr);
      if (HANDLE h=GetClipboardData(CF_TEXT))
        {
          r=static_cast<const char*>(GlobalLock(h));
          GlobalUnlock(h);
        }
      CloseClipboard();
      return r;
#else
     if (pimpl->clipboard)
      {
        auto s=clipboard_text(pimpl->clipboard);
        return s? s: "";
      }
    return {};
#endif
  }
  
  void Clipboard::putClipboard(const std::string& text) const
  {
    // libclipboard didn't work on Windows???
#if defined(_WIN32)
      HWND hwnd=nullptr;//TODO enumerate top level windows to find one belonging to this
      OpenClipboard(hwnd);
      EmptyClipboard();
      HGLOBAL h=GlobalAlloc(GMEM_MOVEABLE, text.length()+1);
      LPTSTR hh=static_cast<LPTSTR>(GlobalLock(h));
      if (hh)
        {
          strcpy(hh,text.c_str());
          GlobalUnlock(h);
          if (SetClipboardData(CF_TEXT, h)==nullptr)
            GlobalFree(h);
        }
      CloseClipboard();
#else
    if (pimpl->clipboard)
      {
        if (text.empty())
          clipboard_clear(pimpl->clipboard, LCB_CLIPBOARD);
        else
          clipboard_set_text(pimpl->clipboard, text.c_str());
      }
#endif
  }

  
}