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a3696c0b91
lib/sysdep: clean up by moving OS and cpu-arch folders into "os" and "arch" folders This was SVN commit r6162.
92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
#include "precompiled.h"
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#include "lib/sysdep/clipboard.h"
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#include "win.h"
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#include "wutil.h"
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// caller is responsible for freeing *hMem.
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static LibError SetClipboardText(const wchar_t* text, HGLOBAL* hMem)
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{
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const size_t len = wcslen(text);
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*hMem = GlobalAlloc(GMEM_MOVEABLE, (len+1) * sizeof(wchar_t));
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if(!*hMem)
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WARN_RETURN(ERR::NO_MEM);
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wchar_t* lockedText = (wchar_t*)GlobalLock(*hMem);
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if(!lockedText)
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WARN_RETURN(ERR::NO_MEM);
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SAFE_WCSCPY(lockedText, text);
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GlobalUnlock(*hMem);
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HANDLE hData = SetClipboardData(CF_UNICODETEXT, *hMem);
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if(!hData) // failed
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WARN_RETURN(ERR::FAIL);
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return INFO::OK;
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}
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// "copy" text into the clipboard. replaces previous contents.
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LibError sys_clipboard_set(const wchar_t* text)
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{
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// note: MSDN claims that the window handle must not be 0;
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// that does actually work on WinXP, but we'll play it safe.
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if(!OpenClipboard(wutil_AppWindow()))
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WARN_RETURN(ERR::FAIL);
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EmptyClipboard();
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HGLOBAL hMem;
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LibError ret = SetClipboardText(text, &hMem);
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CloseClipboard();
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// note: MSDN's SetClipboardData documentation says hMem must not be
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// freed until after CloseClipboard. however, GlobalFree still fails
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// after the successful completion of both. we'll leave it in to avoid
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// memory leaks, but ignore its return value.
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(void)GlobalFree(hMem);
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return ret;
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}
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static wchar_t* CopyClipboardContents()
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{
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// Windows NT/2000+ auto convert UNICODETEXT <-> TEXT
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HGLOBAL hMem = GetClipboardData(CF_UNICODETEXT);
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if(!hMem)
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return 0;
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wchar_t* lockedText = (wchar_t*)GlobalLock(hMem);
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if(!lockedText)
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return 0;
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const SIZE_T size = GlobalSize(hMem);
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wchar_t* text = new wchar_t[size+1];
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SAFE_WCSCPY(text, lockedText);
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GlobalUnlock(hMem);
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return text;
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}
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// allow "pasting" from clipboard. returns the current contents if they
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// can be represented as text, otherwise 0.
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// when it is no longer needed, the returned pointer must be freed via
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// sys_clipboard_free. (NB: not necessary if zero, but doesn't hurt)
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wchar_t* sys_clipboard_get()
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{
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if(!OpenClipboard(wutil_AppWindow()))
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return 0;
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wchar_t* const ret = CopyClipboardContents();
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CloseClipboard();
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return ret;
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}
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// frees memory used by <copy>, which must have been returned by
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// sys_clipboard_get. see note above.
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LibError sys_clipboard_free(wchar_t* text)
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{
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delete[] text;
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return INFO::OK;
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}
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