#8332 - File association on Windows: reimplemented to allow setting PrusaSlicer as default application for .3mf and .stl files and GCodeViewer as default application for .gcode files

This commit is contained in:
enricoturri1966 2022-05-25 13:14:33 +02:00
parent fcd3966a5b
commit 1b09628b0d
4 changed files with 519 additions and 100 deletions

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@ -246,6 +246,8 @@ set(SLIC3R_GUI_SOURCES
Utils/TCPConsole.hpp Utils/TCPConsole.hpp
Utils/MKS.cpp Utils/MKS.cpp
Utils/MKS.hpp Utils/MKS.hpp
Utils/WinRegistry.cpp
Utils/WinRegistry.hpp
) )
if (APPLE) if (APPLE)

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@ -59,6 +59,7 @@
#include "../Utils/Process.hpp" #include "../Utils/Process.hpp"
#include "../Utils/MacDarkMode.hpp" #include "../Utils/MacDarkMode.hpp"
#include "../Utils/AppUpdater.hpp" #include "../Utils/AppUpdater.hpp"
#include "../Utils/WinRegistry.hpp"
#include "slic3r/Config/Snapshot.hpp" #include "slic3r/Config/Snapshot.hpp"
#include "ConfigSnapshotDialog.hpp" #include "ConfigSnapshotDialog.hpp"
#include "FirmwareDialog.hpp" #include "FirmwareDialog.hpp"
@ -3135,119 +3136,22 @@ bool GUI_App::open_browser_with_warning_dialog(const wxString& url, wxWindow* pa
#ifdef __WXMSW__ #ifdef __WXMSW__
static bool set_into_win_registry(HKEY hkeyHive, const wchar_t* pszVar, const wchar_t* pszValue)
{
// see as reference: https://stackoverflow.com/questions/20245262/c-program-needs-an-file-association
wchar_t szValueCurrent[1000];
DWORD dwType;
DWORD dwSize = sizeof(szValueCurrent);
int iRC = ::RegGetValueW(hkeyHive, pszVar, nullptr, RRF_RT_ANY, &dwType, szValueCurrent, &dwSize);
bool bDidntExist = iRC == ERROR_FILE_NOT_FOUND;
if ((iRC != ERROR_SUCCESS) && !bDidntExist)
// an error occurred
return false;
if (!bDidntExist) {
if (dwType != REG_SZ)
// invalid type
return false;
if (::wcscmp(szValueCurrent, pszValue) == 0)
// value already set
return false;
}
DWORD dwDisposition;
HKEY hkey;
iRC = ::RegCreateKeyExW(hkeyHive, pszVar, 0, 0, 0, KEY_ALL_ACCESS, nullptr, &hkey, &dwDisposition);
bool ret = false;
if (iRC == ERROR_SUCCESS) {
iRC = ::RegSetValueExW(hkey, L"", 0, REG_SZ, (BYTE*)pszValue, (::wcslen(pszValue) + 1) * sizeof(wchar_t));
if (iRC == ERROR_SUCCESS)
ret = true;
}
RegCloseKey(hkey);
return ret;
}
void GUI_App::associate_3mf_files() void GUI_App::associate_3mf_files()
{ {
wchar_t app_path[MAX_PATH]; associate_file_type(L".3mf", L"Prusa.Slicer.1", L"PrusaSlicer", true);
::GetModuleFileNameW(nullptr, app_path, sizeof(app_path));
std::wstring prog_path = L"\"" + std::wstring(app_path) + L"\"";
std::wstring prog_id = L"Prusa.Slicer.1";
std::wstring prog_desc = L"PrusaSlicer";
std::wstring prog_command = prog_path + L" \"%1\"";
std::wstring reg_base = L"Software\\Classes";
std::wstring reg_extension = reg_base + L"\\.3mf";
std::wstring reg_prog_id = reg_base + L"\\" + prog_id;
std::wstring reg_prog_id_command = reg_prog_id + L"\\Shell\\Open\\Command";
bool is_new = false;
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_extension.c_str(), prog_id.c_str());
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_prog_id.c_str(), prog_desc.c_str());
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_prog_id_command.c_str(), prog_command.c_str());
if (is_new)
// notify Windows only when any of the values gets changed
::SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, nullptr, nullptr);
} }
void GUI_App::associate_stl_files() void GUI_App::associate_stl_files()
{ {
wchar_t app_path[MAX_PATH]; associate_file_type(L".stl", L"Prusa.Slicer.1", L"PrusaSlicer", true);
::GetModuleFileNameW(nullptr, app_path, sizeof(app_path));
std::wstring prog_path = L"\"" + std::wstring(app_path) + L"\"";
std::wstring prog_id = L"Prusa.Slicer.1";
std::wstring prog_desc = L"PrusaSlicer";
std::wstring prog_command = prog_path + L" \"%1\"";
std::wstring reg_base = L"Software\\Classes";
std::wstring reg_extension = reg_base + L"\\.stl";
std::wstring reg_prog_id = reg_base + L"\\" + prog_id;
std::wstring reg_prog_id_command = reg_prog_id + L"\\Shell\\Open\\Command";
bool is_new = false;
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_extension.c_str(), prog_id.c_str());
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_prog_id.c_str(), prog_desc.c_str());
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_prog_id_command.c_str(), prog_command.c_str());
if (is_new)
// notify Windows only when any of the values gets changed
::SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, nullptr, nullptr);
} }
void GUI_App::associate_gcode_files() void GUI_App::associate_gcode_files()
{ {
wchar_t app_path[MAX_PATH]; associate_file_type(L".gcode", L"PrusaSlicer.GCodeViewer.1", L"PrusaSlicerGCodeViewer", true);
::GetModuleFileNameW(nullptr, app_path, sizeof(app_path));
std::wstring prog_path = L"\"" + std::wstring(app_path) + L"\"";
std::wstring prog_id = L"PrusaSlicer.GCodeViewer.1";
std::wstring prog_desc = L"PrusaSlicerGCodeViewer";
std::wstring prog_command = prog_path + L" \"%1\"";
std::wstring reg_base = L"Software\\Classes";
std::wstring reg_extension = reg_base + L"\\.gcode";
std::wstring reg_prog_id = reg_base + L"\\" + prog_id;
std::wstring reg_prog_id_command = reg_prog_id + L"\\Shell\\Open\\Command";
bool is_new = false;
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_extension.c_str(), prog_id.c_str());
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_prog_id.c_str(), prog_desc.c_str());
is_new |= set_into_win_registry(HKEY_CURRENT_USER, reg_prog_id_command.c_str(), prog_command.c_str());
if (is_new)
// notify Windows only when any of the values gets changed
::SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, nullptr, nullptr);
} }
#endif // __WXMSW__ #endif // __WXMSW__
void GUI_App::on_version_read(wxCommandEvent& evt) void GUI_App::on_version_read(wxCommandEvent& evt)
{ {
app_config->set("version_online", into_u8(evt.GetString())); app_config->set("version_online", into_u8(evt.GetString()));

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@ -0,0 +1,490 @@
#include "libslic3r/Technologies.hpp"
#include "WinRegistry.hpp"
#ifdef _WIN32
#include <shlobj.h>
#include <wincrypt.h>
#include <winternl.h>
#include <sddl.h>
namespace Slic3r {
// Helper class which automatically closes the handle when
// going out of scope
class AutoHandle
{
HANDLE m_handle{ nullptr };
public:
explicit AutoHandle(HANDLE handle) : m_handle(handle) {}
~AutoHandle() { if (m_handle != nullptr) ::CloseHandle(m_handle); }
HANDLE get() { return m_handle; }
};
// Helper class which automatically closes the key when
// going out of scope
class AutoRegKey
{
HKEY m_key{ nullptr };
public:
explicit AutoRegKey(HKEY key) : m_key(key) {}
~AutoRegKey() { if (m_key != nullptr) ::RegCloseKey(m_key); }
HKEY get() { return m_key; }
};
// returns true if the given value is set/modified into Windows registry
static bool set_into_win_registry(HKEY hkeyHive, const wchar_t* pszVar, const wchar_t* pszValue)
{
// see as reference: https://stackoverflow.com/questions/20245262/c-program-needs-an-file-association
wchar_t szValueCurrent[1000];
DWORD dwType;
DWORD dwSize = sizeof(szValueCurrent);
LSTATUS iRC = ::RegGetValueW(hkeyHive, pszVar, nullptr, RRF_RT_ANY, &dwType, szValueCurrent, &dwSize);
const bool bDidntExist = iRC == ERROR_FILE_NOT_FOUND;
if (iRC != ERROR_SUCCESS && !bDidntExist)
// an error occurred
return false;
if (!bDidntExist) {
if (dwType != REG_SZ)
// invalid type
return false;
if (::wcscmp(szValueCurrent, pszValue) == 0)
// value already set
return false;
}
DWORD dwDisposition;
HKEY hkey;
iRC = ::RegCreateKeyExW(hkeyHive, pszVar, 0, 0, 0, KEY_ALL_ACCESS, nullptr, &hkey, &dwDisposition);
bool ret = false;
if (iRC == ERROR_SUCCESS) {
iRC = ::RegSetValueExW(hkey, L"", 0, REG_SZ, (BYTE*)pszValue, (::wcslen(pszValue) + 1) * sizeof(wchar_t));
if (iRC == ERROR_SUCCESS)
ret = true;
}
RegCloseKey(hkey);
return ret;
}
static std::wstring get_current_user_string_sid()
{
HANDLE rawProcessToken;
if (!::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY,
&rawProcessToken))
return L"";
AutoHandle processToken(rawProcessToken);
DWORD userSize = 0;
if (!(!::GetTokenInformation(processToken.get(), TokenUser, nullptr, 0, &userSize) &&
GetLastError() == ERROR_INSUFFICIENT_BUFFER))
return L"";
std::vector<unsigned char> userBytes(userSize);
if (!::GetTokenInformation(processToken.get(), TokenUser, userBytes.data(), userSize, &userSize))
return L"";
wchar_t* rawSid = nullptr;
if (!::ConvertSidToStringSidW(reinterpret_cast<PTOKEN_USER>(userBytes.data())->User.Sid, &rawSid))
return L"";
return rawSid;
}
/*
* Create the string which becomes the input to the UserChoice hash.
*
* @see generate_user_choice_hash() for parameters.
*
* @return The formatted string, empty string on failure.
*
* NOTE: This uses the format as of Windows 10 20H2 (latest as of this writing),
* used at least since 1803.
* There was at least one older version, not currently supported: On Win10 RTM
* (build 10240, aka 1507) the hash function is the same, but the timestamp and
* User Experience string aren't included; instead (for protocols) the string
* ends with the exe path. The changelog of SetUserFTA suggests the algorithm
* changed in 1703, so there may be two versions: before 1703, and 1703 to now.
*/
static std::wstring format_user_choice_string(const wchar_t* aExt, const wchar_t* aUserSid, const wchar_t* aProgId, SYSTEMTIME aTimestamp)
{
aTimestamp.wSecond = 0;
aTimestamp.wMilliseconds = 0;
FILETIME fileTime = { 0 };
if (!::SystemTimeToFileTime(&aTimestamp, &fileTime))
return L"";
// This string is built into Windows as part of the UserChoice hash algorithm.
// It might vary across Windows SKUs (e.g. Windows 10 vs. Windows Server), or
// across builds of the same SKU, but this is the only currently known
// version. There isn't any known way of deriving it, so we assume this
// constant value. If we are wrong, we will not be able to generate correct
// UserChoice hashes.
const wchar_t* userExperience =
L"User Choice set via Windows User Experience "
L"{D18B6DD5-6124-4341-9318-804003BAFA0B}";
const wchar_t* userChoiceFmt =
L"%s%s%s"
L"%08lx"
L"%08lx"
L"%s";
int userChoiceLen = _scwprintf(userChoiceFmt, aExt, aUserSid, aProgId,
fileTime.dwHighDateTime, fileTime.dwLowDateTime, userExperience);
userChoiceLen += 1; // _scwprintf does not include the terminator
std::wstring userChoice(userChoiceLen, L'\0');
_snwprintf_s(userChoice.data(), userChoiceLen, _TRUNCATE, userChoiceFmt, aExt,
aUserSid, aProgId, fileTime.dwHighDateTime, fileTime.dwLowDateTime, userExperience);
::CharLowerW(userChoice.data());
return userChoice;
}
// @return The MD5 hash of the input, nullptr on failure.
static std::vector<DWORD> cng_md5(const unsigned char* bytes, ULONG bytesLen) {
constexpr ULONG MD5_BYTES = 16;
constexpr ULONG MD5_DWORDS = MD5_BYTES / sizeof(DWORD);
std::vector<DWORD> hash;
BCRYPT_ALG_HANDLE hAlg = nullptr;
if (NT_SUCCESS(::BCryptOpenAlgorithmProvider(&hAlg, BCRYPT_MD5_ALGORITHM, nullptr, 0))) {
BCRYPT_HASH_HANDLE hHash = nullptr;
// As of Windows 7 the hash handle will manage its own object buffer when
// pbHashObject is nullptr and cbHashObject is 0.
if (NT_SUCCESS(::BCryptCreateHash(hAlg, &hHash, nullptr, 0, nullptr, 0, 0))) {
// BCryptHashData promises not to modify pbInput.
if (NT_SUCCESS(::BCryptHashData(hHash, const_cast<unsigned char*>(bytes), bytesLen, 0))) {
hash.resize(MD5_DWORDS);
if (!NT_SUCCESS(::BCryptFinishHash(hHash, reinterpret_cast<unsigned char*>(hash.data()),
MD5_DWORDS * sizeof(DWORD), 0)))
hash.clear();
}
::BCryptDestroyHash(hHash);
}
::BCryptCloseAlgorithmProvider(hAlg, 0);
}
return hash;
}
static inline DWORD word_swap(DWORD v)
{
return (v >> 16) | (v << 16);
}
// @return The input bytes encoded as base64, nullptr on failure.
static std::wstring crypto_api_base64_encode(const unsigned char* bytes, DWORD bytesLen) {
DWORD base64Len = 0;
if (!::CryptBinaryToStringW(bytes, bytesLen, CRYPT_STRING_BASE64 | CRYPT_STRING_NOCRLF, nullptr, &base64Len))
return L"";
std::wstring base64(base64Len, L'\0');
if (!::CryptBinaryToStringW(bytes, bytesLen, CRYPT_STRING_BASE64 | CRYPT_STRING_NOCRLF, base64.data(), &base64Len))
return L"";
return base64;
}
/*
* Generate the UserChoice Hash.
*
* This implementation is based on the references listed above.
* It is organized to show the logic as clearly as possible, but at some
* point the reasoning is just "this is how it works".
*
* @param inputString A null-terminated string to hash.
*
* @return The base64-encoded hash, or empty string on failure.
*/
static std::wstring hash_string(const wchar_t* inputString)
{
auto inputBytes = reinterpret_cast<const unsigned char*>(inputString);
int inputByteCount = (::lstrlenW(inputString) + 1) * sizeof(wchar_t);
constexpr size_t DWORDS_PER_BLOCK = 2;
constexpr size_t BLOCK_SIZE = sizeof(DWORD) * DWORDS_PER_BLOCK;
// Incomplete blocks are ignored.
int blockCount = inputByteCount / BLOCK_SIZE;
if (blockCount == 0)
return L"";
// Compute an MD5 hash. md5[0] and md5[1] will be used as constant multipliers
// in the scramble below.
auto md5 = cng_md5(inputBytes, inputByteCount);
if (md5.empty())
return L"";
// The following loop effectively computes two checksums, scrambled like a
// hash after every DWORD is added.
// Constant multipliers for the scramble, one set for each DWORD in a block.
const DWORD C0s[DWORDS_PER_BLOCK][5] = {
{md5[0] | 1, 0xCF98B111uL, 0x87085B9FuL, 0x12CEB96DuL, 0x257E1D83uL},
{md5[1] | 1, 0xA27416F5uL, 0xD38396FFuL, 0x7C932B89uL, 0xBFA49F69uL} };
const DWORD C1s[DWORDS_PER_BLOCK][5] = {
{md5[0] | 1, 0xEF0569FBuL, 0x689B6B9FuL, 0x79F8A395uL, 0xC3EFEA97uL},
{md5[1] | 1, 0xC31713DBuL, 0xDDCD1F0FuL, 0x59C3AF2DuL, 0x35BD1EC9uL} };
// The checksums.
DWORD h0 = 0;
DWORD h1 = 0;
// Accumulated total of the checksum after each DWORD.
DWORD h0Acc = 0;
DWORD h1Acc = 0;
for (int i = 0; i < blockCount; ++i) {
for (int j = 0; j < DWORDS_PER_BLOCK; ++j) {
const DWORD* C0 = C0s[j];
const DWORD* C1 = C1s[j];
DWORD input;
memcpy(&input, &inputBytes[(i * DWORDS_PER_BLOCK + j) * sizeof(DWORD)], sizeof(DWORD));
h0 += input;
// Scramble 0
h0 *= C0[0];
h0 = word_swap(h0) * C0[1];
h0 = word_swap(h0) * C0[2];
h0 = word_swap(h0) * C0[3];
h0 = word_swap(h0) * C0[4];
h0Acc += h0;
h1 += input;
// Scramble 1
h1 = word_swap(h1) * C1[1] + h1 * C1[0];
h1 = (h1 >> 16) * C1[2] + h1 * C1[3];
h1 = word_swap(h1) * C1[4] + h1;
h1Acc += h1;
}
}
DWORD hash[2] = { h0 ^ h1, h0Acc ^ h1Acc };
return crypto_api_base64_encode(reinterpret_cast<const unsigned char*>(hash), sizeof(hash));
}
static std::wstring generate_user_choice_hash(const wchar_t* aExt, const wchar_t* aUserSid, const wchar_t* aProgId, SYSTEMTIME aTimestamp)
{
const std::wstring userChoice = format_user_choice_string(aExt, aUserSid, aProgId, aTimestamp);
if (userChoice.empty())
return L"";
return hash_string(userChoice.c_str());
}
static bool add_milliseconds_to_system_time(SYSTEMTIME& aSystemTime, ULONGLONG aIncrementMS)
{
FILETIME fileTime;
ULARGE_INTEGER fileTimeInt;
if (!::SystemTimeToFileTime(&aSystemTime, &fileTime))
return false;
fileTimeInt.LowPart = fileTime.dwLowDateTime;
fileTimeInt.HighPart = fileTime.dwHighDateTime;
// FILETIME is in units of 100ns.
fileTimeInt.QuadPart += aIncrementMS * 1000 * 10;
fileTime.dwLowDateTime = fileTimeInt.LowPart;
fileTime.dwHighDateTime = fileTimeInt.HighPart;
SYSTEMTIME tmpSystemTime;
if (!::FileTimeToSystemTime(&fileTime, &tmpSystemTime))
return false;
aSystemTime = tmpSystemTime;
return true;
}
// Compare two SYSTEMTIMEs as FILETIME after clearing everything
// below minutes.
static bool check_equal_minutes(SYSTEMTIME aSystemTime1, SYSTEMTIME aSystemTime2)
{
aSystemTime1.wSecond = 0;
aSystemTime1.wMilliseconds = 0;
aSystemTime2.wSecond = 0;
aSystemTime2.wMilliseconds = 0;
FILETIME fileTime1;
FILETIME fileTime2;
if (!::SystemTimeToFileTime(&aSystemTime1, &fileTime1) || !::SystemTimeToFileTime(&aSystemTime2, &fileTime2))
return false;
return (fileTime1.dwLowDateTime == fileTime2.dwLowDateTime) && (fileTime1.dwHighDateTime == fileTime2.dwHighDateTime);
}
static std::wstring get_association_key_path(const wchar_t* aExt)
{
const wchar_t* keyPathFmt;
if (aExt[0] == L'.')
keyPathFmt = L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts\\%s";
else
keyPathFmt = L"SOFTWARE\\Microsoft\\Windows\\Shell\\Associations\\UrlAssociations\\%s";
int keyPathLen = _scwprintf(keyPathFmt, aExt);
keyPathLen += 1; // _scwprintf does not include the terminator
std::wstring keyPath(keyPathLen, '\0');
_snwprintf_s(keyPath.data(), keyPathLen, _TRUNCATE, keyPathFmt, aExt);
return keyPath;
}
/*
* Set an association with a UserChoice key
*
* Removes the old key, creates a new one with ProgID and Hash set to
* enable a new asociation.
*
* @param aExt File type or protocol to associate
* @param aProgID ProgID to use for the asociation
*
* @return true if successful, false on error.
*/
static bool set_user_choice(const wchar_t* aExt, const wchar_t* aProgID) {
const std::wstring aSid = get_current_user_string_sid();
if (aSid.empty())
return false;
SYSTEMTIME hashTimestamp;
::GetSystemTime(&hashTimestamp);
std::wstring hash = generate_user_choice_hash(aExt, aSid.c_str(), aProgID, hashTimestamp);
if (hash.empty())
return false;
// The hash changes at the end of each minute, so check that the hash should
// be the same by the time we're done writing.
const ULONGLONG kWriteTimingThresholdMilliseconds = 100;
// Generating the hash could have taken some time, so start from now.
SYSTEMTIME writeEndTimestamp;
::GetSystemTime(&writeEndTimestamp);
if (!add_milliseconds_to_system_time(writeEndTimestamp, +kWriteTimingThresholdMilliseconds))
return false;
if (!check_equal_minutes(hashTimestamp, writeEndTimestamp)) {
::Sleep(kWriteTimingThresholdMilliseconds * 2);
// For consistency, use the current time.
::GetSystemTime(&hashTimestamp);
hash = generate_user_choice_hash(aExt, aSid.c_str(), aProgID, hashTimestamp);
if (hash.empty())
return false;
}
const std::wstring assocKeyPath = get_association_key_path(aExt);
if (assocKeyPath.empty())
return false;
LSTATUS ls;
HKEY rawAssocKey;
ls = ::RegOpenKeyExW(HKEY_CURRENT_USER, assocKeyPath.data(), 0, KEY_READ | KEY_WRITE, &rawAssocKey);
if (ls != ERROR_SUCCESS)
return false;
AutoRegKey assocKey(rawAssocKey);
HKEY currUserChoiceKey;
ls = ::RegOpenKeyExW(assocKey.get(), L"UserChoice", 0, KEY_READ, &currUserChoiceKey);
if (ls == ERROR_SUCCESS) {
::RegCloseKey(currUserChoiceKey);
// When Windows creates this key, it is read-only (Deny Set Value), so we need
// to delete it first.
// We don't set any similar special permissions.
ls = ::RegDeleteKeyW(assocKey.get(), L"UserChoice");
if (ls != ERROR_SUCCESS)
return false;
}
HKEY rawUserChoiceKey;
ls = ::RegCreateKeyExW(assocKey.get(), L"UserChoice", 0, nullptr,
0 /* options */, KEY_READ | KEY_WRITE,
0 /* security attributes */, &rawUserChoiceKey,
nullptr);
if (ls != ERROR_SUCCESS)
return false;
AutoRegKey userChoiceKey(rawUserChoiceKey);
DWORD progIdByteCount = (::lstrlenW(aProgID) + 1) * sizeof(wchar_t);
ls = ::RegSetValueExW(userChoiceKey.get(), L"ProgID", 0, REG_SZ, reinterpret_cast<const unsigned char*>(aProgID), progIdByteCount);
if (ls != ERROR_SUCCESS)
return false;
DWORD hashByteCount = (::lstrlenW(hash.data()) + 1) * sizeof(wchar_t);
ls = ::RegSetValueExW(userChoiceKey.get(), L"Hash", 0, REG_SZ, reinterpret_cast<const unsigned char*>(hash.data()), hashByteCount);
if (ls != ERROR_SUCCESS)
return false;
return true;
}
static bool set_as_default_per_file_type(const std::wstring& extension, const std::wstring& prog_id)
{
const std::wstring reg_extension = get_association_key_path(extension.c_str());
if (reg_extension.empty())
return false;
bool needs_update = true;
bool modified = false;
HKEY rawAssocKey = nullptr;
LSTATUS res = ::RegOpenKeyExW(HKEY_CURRENT_USER, reg_extension.c_str(), 0, KEY_READ, &rawAssocKey);
AutoRegKey assoc_key(rawAssocKey);
if (res == ERROR_SUCCESS) {
DWORD data_size_bytes = 0;
res = ::RegGetValueW(assoc_key.get(), L"UserChoice", L"ProgId", RRF_RT_REG_SZ, nullptr, nullptr, &data_size_bytes);
if (res == ERROR_SUCCESS) {
// +1 in case dataSizeBytes was odd, +1 to ensure termination
DWORD data_size_chars = (data_size_bytes / sizeof(wchar_t)) + 2;
std::wstring curr_prog_id(data_size_chars, L'\0');
res = ::RegGetValueW(assoc_key.get(), L"UserChoice", L"ProgId", RRF_RT_REG_SZ, nullptr, curr_prog_id.data(), &data_size_bytes);
if (res == ERROR_SUCCESS) {
const std::wstring::size_type pos = curr_prog_id.find_first_of(L'\0');
if (pos != std::wstring::npos)
curr_prog_id = curr_prog_id.substr(0, pos);
needs_update = !boost::algorithm::iequals(curr_prog_id, prog_id);
}
}
}
if (needs_update)
modified = set_user_choice(extension.c_str(), prog_id.c_str());
return modified;
}
void associate_file_type(const std::wstring& extension, const std::wstring& prog_id, const std::wstring& prog_desc, bool set_as_default)
{
assert(!extension.empty() && extension.front() == L'.');
const std::wstring reg_extension = L"SOFTWARE\\Classes\\" + extension;
const std::wstring reg_prog_id = L"SOFTWARE\\Classes\\" + prog_id;
const std::wstring reg_prog_id_command = L"SOFTWARE\\Classes\\" + prog_id + +L"\\Shell\\Open\\Command";
wchar_t app_path[1040];
::GetModuleFileNameW(nullptr, app_path, sizeof(app_path));
const std::wstring prog_command = L"\"" + std::wstring(app_path) + L"\"" + L" \"%1\"";
bool modified = false;
modified |= set_into_win_registry(HKEY_CURRENT_USER, reg_extension.c_str(), prog_id.c_str());
modified |= set_into_win_registry(HKEY_CURRENT_USER, reg_prog_id.c_str(), prog_desc.c_str());
modified |= set_into_win_registry(HKEY_CURRENT_USER, reg_prog_id_command.c_str(), prog_command.c_str());
if (set_as_default)
modified |= set_as_default_per_file_type(extension, prog_id);
// notify Windows only when any of the values gets changed
if (modified)
::SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, nullptr, nullptr);
}
} // namespace Slic3r
#endif // _WIN32

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#ifndef slic3r_Utils_WinRegistry_hpp_
#define slic3r_Utils_WinRegistry_hpp_
#ifdef _WIN32
#include <string>
namespace Slic3r {
// Creates a Windows registry key for the files with the given 'extension' and associates them to the application 'prog_id'.
// If 'set_as_default' is true, the application 'prog_id' is set ad default application for the file type 'extension'.
// The file type registration implementation is based on code taken from:
// https://stackoverflow.com/questions/20245262/c-program-needs-an-file-association
// The set as default implementation is based on code taken from:
// https://hg.mozilla.org/mozilla-central/rev/e928b3e95a6c3b7257d0ba475fc2303bfbad1874
// https://hg.mozilla.org/releases/mozilla-release/diff/7e775ce432b599c6daf7ac379aa42f1e9b3b33ed/browser/components/shell/WindowsUserChoice.cpp
void associate_file_type(const std::wstring& extension, const std::wstring& prog_id, const std::wstring& prog_desc, bool set_as_default);
} // namespace Slic3r
#endif // _WIN32
#endif // slic3r_Utils_WinRegistry_hpp_