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/* Copyright (C) 2010 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "precompiled.h"
#include "lib/sysdep/clipboard.h"
#include "lib/sysdep/os/win/win.h"
#include "lib/sysdep/os/win/wutil.h"
// caller is responsible for freeing hMem.
static Status SetClipboardText(const wchar_t* text, HGLOBAL& hMem)
{
const size_t numChars = wcslen(text);
hMem = GlobalAlloc(GMEM_MOVEABLE|GMEM_ZEROINIT, (numChars + 1) * sizeof(wchar_t));
if(!hMem)
WARN_RETURN(ERR::NO_MEM);
wchar_t* lockedText = (wchar_t*)GlobalLock(hMem);
if(!lockedText)
WARN_RETURN(ERR::NO_MEM);
wcscpy_s(lockedText, numChars+1, text);
GlobalUnlock(hMem);
HANDLE hData = SetClipboardData(CF_UNICODETEXT, hMem);
if(!hData) // failed
WARN_RETURN(ERR::FAIL);
return INFO::OK;
}
// @return INFO::OK iff text has been assigned a pointer (which the
// caller must free via sys_clipboard_free) to the clipboard text.
static Status GetClipboardText(wchar_t*& text)
{
// NB: Windows NT/2000+ auto convert CF_UNICODETEXT <-> CF_TEXT.
if(!IsClipboardFormatAvailable(CF_UNICODETEXT))
return INFO::CANNOT_HANDLE;
HGLOBAL hMem = GetClipboardData(CF_UNICODETEXT);
if(!hMem)
WARN_RETURN(ERR::FAIL);
const wchar_t* lockedText = (const wchar_t*)GlobalLock(hMem);
if(!lockedText)
WARN_RETURN(ERR::NO_MEM);
const size_t size = GlobalSize(hMem);
text = (wchar_t*)malloc(size);
if(!text)
WARN_RETURN(ERR::NO_MEM);
wcscpy_s(text, size/sizeof(wchar_t), lockedText);
(void)GlobalUnlock(hMem);
return INFO::OK;
}
// OpenClipboard parameter.
// NB: using wutil_AppWindow() causes GlobalLock to fail.
static const HWND hWndNewOwner = 0; // MSDN: associate with "current task"
Status sys_clipboard_set(const wchar_t* text)
{
if(!OpenClipboard(hWndNewOwner))
WARN_RETURN(ERR::FAIL);
WARN_IF_FALSE(EmptyClipboard());
// NB: to enable copy/pasting something other than text, add
// message handlers for WM_RENDERFORMAT and WM_RENDERALLFORMATS.
HGLOBAL hMem;
Status ret = SetClipboardText(text, hMem);
WARN_IF_FALSE(CloseClipboard()); // must happen before GlobalFree
ENSURE(GlobalFree(hMem) == 0); // (0 indicates success)
return ret;
}
wchar_t* sys_clipboard_get()
{
if(!OpenClipboard(hWndNewOwner))
return 0;
wchar_t* text;
Status ret = GetClipboardText(text);
WARN_IF_FALSE(CloseClipboard());
return (ret == INFO::OK)? text : 0;
}
Status sys_clipboard_free(wchar_t* text)
{
free(text);
return INFO::OK;
}
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