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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This 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 2 of the License, or
* (at your option) any later version.
*
* This software 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 this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// -=- Clipboard.cxx
#include <rfb_win32/Clipboard.h>
#include <rfb_win32/WMShatter.h>
#include <rfb/util.h>
#include <rfb/LogWriter.h>
using namespace rfb;
using namespace rfb::win32;
static LogWriter vlog("Clipboard");
//
// -=- CR/LF handlers
//
char*
dos2unix(const char* text) {
int len = strlen(text)+1;
char* unix = new char[strlen(text)+1];
int i, j=0;
for (i=0; i<len; i++) {
if (text[i] != '\x0d')
unix[j++] = text[i];
}
return unix;
}
char*
unix2dos(const char* text) {
int len = strlen(text)+1;
char* dos = new char[strlen(text)*2+1];
int i, j=0;
for (i=0; i<len; i++) {
if (text[i] == '\x0a')
dos[j++] = '\x0d';
dos[j++] = text[i];
}
return dos;
}
//
// -=- ISO-8859-1 (Latin 1) filter (in-place)
//
void
removeNonISOLatin1Chars(char* text) {
int len = strlen(text);
int i=0, j=0;
for (; i<len; i++) {
if (((text[i] >= 1) && (text[i] <= 127)) ||
((text[i] >= 160) && (text[i] <= 255)))
text[j++] = text[i];
}
text[j] = 0;
}
//
// -=- Clipboard object
//
Clipboard::Clipboard()
: MsgWindow(_T("Clipboard")), notifier(0), next_window(0) {
next_window = SetClipboardViewer(getHandle());
vlog.debug("registered clipboard handler");
}
Clipboard::~Clipboard() {
vlog.debug("removing %p from chain (next is %p)", getHandle(), next_window);
ChangeClipboardChain(getHandle(), next_window);
}
LRESULT
Clipboard::processMessage(UINT msg, WPARAM wParam, LPARAM lParam) {
switch (msg) {
case WM_CHANGECBCHAIN:
vlog.debug("change clipboard chain (%I64x, %I64x)",
(long long)wParam, (long long)lParam);
if ((HWND) wParam == next_window)
next_window = (HWND) lParam;
else if (next_window != 0)
SendMessage(next_window, msg, wParam, lParam);
else
vlog.error("bad clipboard chain change!");
break;
case WM_DRAWCLIPBOARD:
{
HWND owner = GetClipboardOwner();
if (owner == getHandle()) {
vlog.debug("local clipboard changed by me");
} else {
vlog.debug("local clipboard changed by %p", owner);
// Open the clipboard
if (OpenClipboard(getHandle())) {
// Get the clipboard data
HGLOBAL cliphandle = GetClipboardData(CF_TEXT);
if (cliphandle) {
char* clipdata = (char*) GlobalLock(cliphandle);
// Notify clients
if (notifier) {
if (!clipdata) {
notifier->notifyClipboardChanged(0, 0);
} else {
CharArray unix_text;
unix_text.buf = dos2unix(clipdata);
removeNonISOLatin1Chars(unix_text.buf);
notifier->notifyClipboardChanged(unix_text.buf, strlen(unix_text.buf));
}
} else {
vlog.debug("no clipboard notifier registered");
}
// Release the buffer and close the clipboard
GlobalUnlock(cliphandle);
}
CloseClipboard();
}
}
}
if (next_window)
SendMessage(next_window, msg, wParam, lParam);
return 0;
};
return MsgWindow::processMessage(msg, wParam, lParam);
};
void
Clipboard::setClipText(const char* text) {
HANDLE clip_handle = 0;
try {
// - Firstly, we must open the clipboard
if (!OpenClipboard(getHandle()))
throw rdr::SystemException("unable to open Win32 clipboard", GetLastError());
// - Pre-process the supplied clipboard text into DOS format
CharArray dos_text;
dos_text.buf = unix2dos(text);
removeNonISOLatin1Chars(dos_text.buf);
int dos_text_len = strlen(dos_text.buf);
// - Allocate global memory for the data
clip_handle = ::GlobalAlloc(GMEM_MOVEABLE, dos_text_len+1);
char* data = (char*) GlobalLock(clip_handle);
memcpy(data, dos_text.buf, dos_text_len+1);
data[dos_text_len] = 0;
GlobalUnlock(clip_handle);
// - Next, we must clear out any existing data
if (!EmptyClipboard())
throw rdr::SystemException("unable to empty Win32 clipboard", GetLastError());
// - Set the new clipboard data
if (!SetClipboardData(CF_TEXT, clip_handle))
throw rdr::SystemException("unable to set Win32 clipboard", GetLastError());
clip_handle = 0;
vlog.debug("set clipboard");
} catch (rdr::Exception& e) {
vlog.debug("%s", e.str());
}
// - Close the clipboard
if (!CloseClipboard())
vlog.debug("unable to close Win32 clipboard: %lu", GetLastError());
else
vlog.debug("closed clipboard");
if (clip_handle) {
vlog.debug("freeing clipboard handle");
GlobalFree(clip_handle);
}
}
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