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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package 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.
*/
#include "CMSWindowsClipboard.h"
#include "CMSWindowsClipboardTextConverter.h"
#include "CMSWindowsClipboardUTF16Converter.h"
#include "CMSWindowsClipboardBitmapConverter.h"
#include "CMSWindowsClipboardHTMLConverter.h"
#include "CLog.h"
#include "CArchMiscWindows.h"
//
// CMSWindowsClipboard
//
UINT CMSWindowsClipboard::s_ownershipFormat = 0;
CMSWindowsClipboard::CMSWindowsClipboard(HWND window) :
m_window(window),
m_time(0)
{
// add converters, most desired first
m_converters.push_back(new CMSWindowsClipboardUTF16Converter);
if (CArchMiscWindows::isWindows95Family()) {
// windows nt family converts to/from unicode automatically.
// let it do so to avoid text encoding issues.
m_converters.push_back(new CMSWindowsClipboardTextConverter);
}
m_converters.push_back(new CMSWindowsClipboardBitmapConverter);
m_converters.push_back(new CMSWindowsClipboardHTMLConverter);
}
CMSWindowsClipboard::~CMSWindowsClipboard()
{
clearConverters();
}
bool
CMSWindowsClipboard::emptyUnowned()
{
LOG((CLOG_DEBUG "empty clipboard"));
// empty the clipboard (and take ownership)
if (!EmptyClipboard()) {
LOG((CLOG_DEBUG "failed to grab clipboard"));
return false;
}
return true;
}
bool
CMSWindowsClipboard::empty()
{
if (!emptyUnowned()) {
return false;
}
// mark clipboard as being owned by synergy
HGLOBAL data = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, 1);
SetClipboardData(getOwnershipFormat(), data);
return true;
}
void
CMSWindowsClipboard::add(EFormat format, const CString& data)
{
LOG((CLOG_DEBUG "add %d bytes to clipboard format: %d", data.size(), format));
// convert data to win32 form
for (ConverterList::const_iterator index = m_converters.begin();
index != m_converters.end(); ++index) {
IMSWindowsClipboardConverter* converter = *index;
// skip converters for other formats
if (converter->getFormat() == format) {
HANDLE win32Data = converter->fromIClipboard(data);
if (win32Data != NULL) {
UINT win32Format = converter->getWin32Format();
if (SetClipboardData(win32Format, win32Data) == NULL) {
// free converted data if we couldn't put it on
// the clipboard
GlobalFree(win32Data);
}
}
}
}
}
bool
CMSWindowsClipboard::open(Time time) const
{
LOG((CLOG_DEBUG "open clipboard"));
if (!OpenClipboard(m_window)) {
LOG((CLOG_WARN "failed to open clipboard"));
return false;
}
m_time = time;
return true;
}
void
CMSWindowsClipboard::close() const
{
LOG((CLOG_DEBUG "close clipboard"));
CloseClipboard();
}
IClipboard::Time
CMSWindowsClipboard::getTime() const
{
return m_time;
}
bool
CMSWindowsClipboard::has(EFormat format) const
{
for (ConverterList::const_iterator index = m_converters.begin();
index != m_converters.end(); ++index) {
IMSWindowsClipboardConverter* converter = *index;
if (converter->getFormat() == format) {
if (IsClipboardFormatAvailable(converter->getWin32Format())) {
return true;
}
}
}
return false;
}
CString
CMSWindowsClipboard::get(EFormat format) const
{
// find the converter for the first clipboard format we can handle
IMSWindowsClipboardConverter* converter = NULL;
UINT win32Format = EnumClipboardFormats(0);
while (converter == NULL && win32Format != 0) {
for (ConverterList::const_iterator index = m_converters.begin();
index != m_converters.end(); ++index) {
converter = *index;
if (converter->getWin32Format() == win32Format &&
converter->getFormat() == format) {
break;
}
converter = NULL;
}
win32Format = EnumClipboardFormats(win32Format);
}
// if no converter then we don't recognize any formats
if (converter == NULL) {
return CString();
}
// get a handle to the clipboard data
HANDLE win32Data = GetClipboardData(converter->getWin32Format());
if (win32Data == NULL) {
return CString();
}
// convert
return converter->toIClipboard(win32Data);
}
void
CMSWindowsClipboard::clearConverters()
{
for (ConverterList::iterator index = m_converters.begin();
index != m_converters.end(); ++index) {
delete *index;
}
m_converters.clear();
}
bool
CMSWindowsClipboard::isOwnedBySynergy()
{
// create ownership format if we haven't yet
if (s_ownershipFormat == 0) {
s_ownershipFormat = RegisterClipboardFormat(TEXT("SynergyOwnership"));
}
return (IsClipboardFormatAvailable(getOwnershipFormat()) != 0);
}
UINT
CMSWindowsClipboard::getOwnershipFormat()
{
// create ownership format if we haven't yet
if (s_ownershipFormat == 0) {
s_ownershipFormat = RegisterClipboardFormat(TEXT("SynergyOwnership"));
}
// return the format
return s_ownershipFormat;
}
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