barrier/lib/synergy/CClipboard.cpp

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#include "CClipboard.h"
//
// CClipboard
//
CClipboard::CClipboard() :
m_open(false),
m_owner(false)
{
open(0);
empty();
close();
}
CClipboard::~CClipboard()
{
// do nothing
}
bool
CClipboard::empty()
{
assert(m_open);
// clear all data
for (SInt32 index = 0; index < kNumFormats; ++index) {
m_data[index] = "";
m_added[index] = false;
}
// save time
m_timeOwned = m_time;
// we're the owner now
m_owner = true;
return true;
}
void
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CClipboard::add(EFormat format, const CString& data)
{
assert(m_open);
assert(m_owner);
m_data[format] = data;
m_added[format] = true;
}
bool
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CClipboard::open(Time time) const
{
assert(!m_open);
m_open = true;
m_time = time;
return true;
}
void
CClipboard::close() const
{
assert(m_open);
m_open = false;
}
CClipboard::Time
CClipboard::getTime() const
{
return m_timeOwned;
}
bool
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CClipboard::has(EFormat format) const
{
assert(m_open);
return m_added[format];
}
CString
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CClipboard::get(EFormat format) const
{
assert(m_open);
return m_data[format];
}
bool
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CClipboard::copy(IClipboard* dst, const IClipboard* src)
{
assert(dst != NULL);
assert(src != NULL);
return copy(dst, src, src->getTime());
}
bool
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CClipboard::copy(IClipboard* dst, const IClipboard* src, Time time)
{
assert(dst != NULL);
assert(src != NULL);
bool success = false;
if (src->open(time)) {
if (dst->open(time)) {
if (dst->empty()) {
for (SInt32 format = 0;
format != IClipboard::kNumFormats; ++format) {
IClipboard::EFormat eFormat = (IClipboard::EFormat)format;
if (src->has(eFormat)) {
dst->add(eFormat, src->get(eFormat));
}
}
success = true;
}
dst->close();
}
src->close();
}
return success;
}
void
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CClipboard::unmarshall(const CString& data, Time time)
{
const char* index = data.data();
// clear existing data
open(time);
empty();
// read the number of formats
const UInt32 numFormats = readUInt32(index);
index += 4;
// read each format
for (UInt32 i = 0; i < numFormats; ++i) {
// get the format id
UInt32 format = readUInt32(index);
index += 4;
// get the size of the format data
UInt32 size = readUInt32(index);
index += 4;
// save the data if it's a known format. if either the client
// or server supports more clipboard formats than the other
// then one of them will get a format >= kNumFormats here.
if (format < static_cast<UInt32>(IClipboard::kNumFormats)) {
m_added[format] = true;
m_data[format] = CString(index, size);
}
index += size;
}
// done
close();
}
CString
CClipboard::marshall() const
{
CString data;
// compute size of marshalled data
UInt32 size = 4;
UInt32 numFormats = 0;
UInt32 format;
for (format = 0; format != IClipboard::kNumFormats; ++format) {
if (m_added[format]) {
++numFormats;
size += 4 + 4 + m_data[format].size();
}
}
// allocate space
data.reserve(size);
// marshall the data
writeUInt32(&data, numFormats);
for (format = 0; format != IClipboard::kNumFormats; ++format) {
if (m_added[format]) {
writeUInt32(&data, format);
writeUInt32(&data, m_data[format].size());
data += m_data[format];
}
}
return data;
}
UInt32
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CClipboard::readUInt32(const char* buf) const
{
const unsigned char* ubuf = reinterpret_cast<const unsigned char*>(buf);
return (static_cast<UInt32>(ubuf[0]) << 24) |
(static_cast<UInt32>(ubuf[1]) << 16) |
(static_cast<UInt32>(ubuf[2]) << 8) |
static_cast<UInt32>(ubuf[3]);
}
void
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CClipboard::writeUInt32(CString* buf, UInt32 v) const
{
*buf += static_cast<UInt8>((v >> 24) & 0xff);
*buf += static_cast<UInt8>((v >> 16) & 0xff);
*buf += static_cast<UInt8>((v >> 8) & 0xff);
*buf += static_cast<UInt8>( v & 0xff);
}