Method DdeCallback

src/openboardview/PDFBridge/PDFBridgeSumatra.cpp:44–118

}

HDDEDATA CALLBACK PDFBridgeSumatra::DdeCallback(
    UINT uType,     // Transaction type.
    UINT uFmt,      // Clipboard data format.
    HCONV hconv,    // Handle to the conversation.
    HSZ hsz1,       // Handle to a string.
    HSZ hsz2,       // Handle to a string.
    HDDEDATA hdata, // Handle to a global memory object.
    ULONG_PTR dwData1,  // Transaction-specific data.
    ULONG_PTR dwData2) { // Transaction-specific data.
	SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "PDFBridgeSumatra DdeCallback, uType=%d", uType);


	assert(PDFBridgeSumatra::instance != nullptr);
	PDFBridgeSumatra &pdfBridgeSumatra = *PDFBridgeSumatra::instance;

	switch (uType) {
		case XTYP_CONNECT: {
			if (DdeCmpStringHandles(hsz2, pdfBridgeSumatra.hszServerService)) {
				SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "PDFBridgeSumatra DdeCallback Client request connection to unhandled service '%s'", pdfBridgeSumatra.GetDDEString(hsz2).c_str());
				return FALSE;
			} else if (DdeCmpStringHandles(hsz1, pdfBridgeSumatra.hszServerTopic)) {
				SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "PDFBridgeSumatra DdeCallback Client request connection to unhandled topic '%s'", pdfBridgeSumatra.GetDDEString(hsz1).c_str());
				return FALSE;
			} else {
				SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "PDFBridgeSumatra DdeCallback Client request connection to service '%s', topic '%s'", pdfBridgeSumatra.GetDDEString(hsz2).c_str(), pdfBridgeSumatra.GetDDEString(hsz1).c_str());
				return reinterpret_cast<HDDEDATA>(TRUE);
			}

			break;
		}

		case XTYP_CONNECT_CONFIRM: {
			SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "%s", "PDFBridgeSumatra DdeCallback Client connected");
			break;
		}

		case XTYP_EXECUTE: {
			size_t len = DdeGetData(hdata, nullptr, 0, 0); // Length of data in bytes (trailing NULL char included)
			std::vector<unsigned char> buf(len);
			DdeGetData(hdata, buf.data(), buf.size(), 0); // Populate buffer of bytes first
			std::vector<wchar_t> wbuf(len / 2);
			std::memcpy(wbuf.data(), buf.data(), buf.size()); // Then transfer to buffer of wchar_t
			std::wstring wstr(wbuf.data()); // To create a wstring from it
			std::string str = utf16_to_utf8(wstr);

			SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "PDFBridgeSumatra DdeCallback Client execute: %s", str.c_str());

			if (!str.compare(0, 9, "[Search(\"") && !str.compare(str.size() - 3, 3, "\")]")) {
				auto searchStr = str.substr(9, str.size() - 9 - 3); // Split parameters between "[Search(" and ")]"

				SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "PDFBridgeSumatra DdeCallback Client Search '%s'", searchStr.c_str());
				pdfBridgeSumatra.reverseSearchStr = searchStr;
				pdfBridgeSumatra.reverseSearchStrChanged = true;

				// Push event to SDL queue in order to refresh GUI
				SDL_Event sdlEvent;
				sdlEvent.type = SDL_USEREVENT;
				SDL_PushEvent(&sdlEvent);