lifegpc/eh_downloader_flutter
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Impl saveFile on Windows platform

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lifegpc
2023-09-09 09:56:45 +08:00
parent 99550bdbda
commit 25447e9667
6 changed files with 90 additions and 5 deletions
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65
windows/runner/flutter_window.cpp
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@@ -58,6 +58,71 @@ bool FlutterWindow::OnCreate() {
result->NotImplemented();
}
});
flutter::MethodChannel<> saf(flutter_controller_->engine()->messenger(), "lifegpc.eh_downloader_flutter/saf",
&flutter::StandardMethodCodec::GetInstance());
saf.SetMethodCallHandler([&](const flutter::MethodCall<>& call, std::unique_ptr<flutter::MethodResult<>> result) {
if (call.method_name() == "saveFile") {
auto args = std::get_if<flutter::EncodableList>(call.arguments());
auto fileName = std::get_if<std::string>(&args->at(0));
auto dir = std::get_if<std::string>(&args->at(1));
auto mimeType = std::get_if<std::string>(&args->at(2));
auto data = std::get_if<std::vector<uint8_t>>(&args->at(3));
if (!fileName || !dir || !mimeType || !data) {
result->Error("INVALID_ARGUMENT", "Invalid arguments.");
return;
}
std::wstring wFileName;
if (!wchar_util::str_to_wstr(wFileName, *fileName, CP_UTF8)) {
result->Error("ERROR", "Failed to convert file name to wstring.");
return;
}
std::wstring wDir;
if (!dir->empty() && !wchar_util::str_to_wstr(wDir, *dir, CP_UTF8)) {
result->Error("ERROR", "Failed to convert dir to wstring.");
return;
}
OPENFILENAMEW ofn;
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = Win32Window::GetHandle();
std::wstring filter;
std::wstring defExt;
if (*mimeType == "image/jpeg") {
filter.append(std::wstring(L"JPEG File(*.jpg)\0*.jpg\0", 23));
defExt = L"jpg";
} else if (*mimeType == "image/png") {
filter.append(std::wstring(L"PNG File(*.png)\0*.png\0", 22));
defExt = L"png";
} else if (*mimeType == "image/gif") {
filter.append(std::wstring(L"GIF File(*.gif)\0*.gif\0", 22));
defExt = L"gif";
};
filter.append(std::wstring(L"All Files\0*.*\0\0", 15));
ofn.lpstrFilter = filter.c_str();
ofn.lpstrDefExt = defExt.empty() ? nullptr : defExt.c_str();
wchar_t wFileNameBuf[MAX_PATH_SIZE];
memcpy(wFileNameBuf, wFileName.c_str(), (wFileName.size() + 1) * sizeof(wchar_t));
ofn.lpstrFile = wFileNameBuf;
ofn.nMaxFile = MAX_PATH_SIZE;
ofn.lpstrInitialDir = wDir.empty() ? nullptr : wDir.c_str();
ofn.Flags = OFN_DONTADDTORECENT | OFN_NONETWORKBUTTON | OFN_NOREADONLYRETURN | OFN_OVERWRITEPROMPT;
if (!GetSaveFileNameW(&ofn)) {
result->Error("ERROR", "Failed to get file name.");
return;
}
FILE* f = nullptr;
_wfopen_s(&f, wFileNameBuf, L"wb");
if (!f) {
result->Error("ERROR", "Failed to open file.");
return;
}
fwrite(data->data(), sizeof(uint8_t), data->size(), f);
fclose(f);
result->Success();
} else {
result->NotImplemented();
}
});
SetChildContent(flutter_controller_->view()->GetNativeWindow());