Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 646 insertions, 0 deletions

diff --git a/extensions/source/scanner/scanwin.cxx b/extensions/source/scanner/scanwin.cxx
new file mode 100644
index 000000000..109f2944a
--- /dev/null
+++ b/extensions/source/scanner/scanwin.cxx
@@ -0,0 +1,646 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/frame/XFrame.hpp>
+#include <com/sun/star/frame/Desktop.hpp>
+#include <com/sun/star/scanner/ScannerException.hpp>
+
+#include "twain32shim.hxx"
+
+#include <comphelper/processfactory.hxx>
+#include <comphelper/scopeguard.hxx>
+#include <config_folders.h>
+#include <o3tl/char16_t2wchar_t.hxx>
+#include <osl/conditn.hxx>
+#include <osl/file.hxx>
+#include <osl/mutex.hxx>
+#include <rtl/bootstrap.hxx>
+#include <salhelper/thread.hxx>
+#include <toolkit/helper/vclunohelper.hxx>
+#include <tools/stream.hxx>
+#include <tools/helpers.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/window.hxx>
+#include "scanner.hxx"
+
+namespace
+{
+enum TwainState
+{
+    TWAIN_STATE_NONE = 0,
+    TWAIN_STATE_SCANNING = 1,
+    TWAIN_STATE_DONE = 2,
+    TWAIN_STATE_CANCELED = 3
+};
+
+struct HANDLEDeleter
+{
+    using pointer = HANDLE;
+    void operator()(HANDLE h) { CloseHandle(h); }
+};
+
+using ScopedHANDLE = std::unique_ptr<HANDLE, HANDLEDeleter>;
+
+class Twain
+{
+public:
+    Twain();
+    ~Twain();
+
+    bool SelectSource(ScannerManager& rMgr, const VclPtr<vcl::Window>& xTopWindow);
+    bool PerformTransfer(ScannerManager& rMgr,
+                         const css::uno::Reference<css::lang::XEventListener>& rxListener,
+                         const VclPtr<vcl::Window>& xTopWindow);
+    void WaitReadyForNextTask();
+
+    TwainState GetState() const { return meState; }
+
+private:
+    friend class ShimListenerThread;
+    class ShimListenerThread : public salhelper::Thread
+    {
+    public:
+        ShimListenerThread(const VclPtr<vcl::Window>& xTopWindow);
+        ~ShimListenerThread() override;
+        void execute() override;
+        const OUString& getError() { return msErrorReported; }
+
+        // These methods are executed outside of own thread
+        bool WaitInitialization();
+        bool WaitRequestResult();
+        void DontNotify() { mbDontNotify = true; }
+        void RequestDestroy();
+        bool RequestSelectSource();
+        bool RequestInitXfer();
+
+    private:
+        VclPtr<vcl::Window> mxTopWindow; // the window that we made modal
+        bool mbDontNotify = false;
+        HWND mhWndShim = nullptr; // shim main window handle
+        OUString msErrorReported;
+        osl::Condition mcInitCompleted; // initially not set
+        bool mbInitSucceeded = false;
+        osl::Condition mcGotRequestResult;
+        bool mbRequestResult = false;
+
+        void SendShimRequest(WPARAM nRequest);
+        bool SendShimRequestWithResult(WPARAM nRequest);
+        void NotificationHdl(WPARAM nEvent, LPARAM lParam);
+        void NotifyOwner(WPARAM nEvent);
+        void NotifyXFerOwner(LPARAM nHandle);
+    };
+    css::uno::Reference<css::lang::XEventListener> mxListener;
+    css::uno::Reference<css::scanner::XScannerManager> mxMgr;
+    ScannerManager* mpCurMgr = nullptr;
+    TwainState meState = TWAIN_STATE_NONE;
+    rtl::Reference<ShimListenerThread> mpThread;
+    osl::Mutex maMutex;
+
+    DECL_LINK(ImpNotifyHdl, void*, void);
+    DECL_LINK(ImpNotifyXferHdl, void*, void);
+    void Notify(WPARAM nEvent); // called by shim communication thread to notify me
+    void NotifyXFer(LPARAM nHandle); // called by shim communication thread to notify me
+
+    bool InitializeNewShim(ScannerManager& rMgr, const VclPtr<vcl::Window>& xTopWindow);
+
+    void Reset(); // cleanup thread and manager
+};
+
+Twain aTwain;
+
+Twain::ShimListenerThread::ShimListenerThread(const VclPtr<vcl::Window>& xTopWindow)
+    : salhelper::Thread("TWAINShimListenerThread")
+    , mxTopWindow(xTopWindow)
+{
+    if (mxTopWindow)
+    {
+        mxTopWindow->IncModalCount(); // the operation is modal to the frame
+    }
+}
+
+Twain::ShimListenerThread::~ShimListenerThread()
+{
+    if (mxTopWindow)
+    {
+        mxTopWindow->DecModalCount(); // unblock the frame
+    }
+}
+
+bool Twain::ShimListenerThread::WaitInitialization()
+{
+    mcInitCompleted.wait();
+    return mbInitSucceeded;
+}
+
+bool Twain::ShimListenerThread::WaitRequestResult()
+{
+    mcGotRequestResult.wait();
+    return mbRequestResult;
+}
+
+void Twain::ShimListenerThread::SendShimRequest(WPARAM nRequest)
+{
+    if (mhWndShim)
+        PostMessageW(mhWndShim, WM_TWAIN_REQUEST, nRequest, 0);
+}
+
+bool Twain::ShimListenerThread::SendShimRequestWithResult(WPARAM nRequest)
+{
+    mcGotRequestResult.reset();
+    mbRequestResult = false;
+    SendShimRequest(nRequest);
+    return WaitRequestResult();
+}
+
+void Twain::ShimListenerThread::RequestDestroy() { SendShimRequest(TWAIN_REQUEST_QUIT); }
+
+bool Twain::ShimListenerThread::RequestSelectSource()
+{
+    assert(mbInitSucceeded);
+    return SendShimRequestWithResult(TWAIN_REQUEST_SELECTSOURCE);
+}
+
+bool Twain::ShimListenerThread::RequestInitXfer()
+{
+    assert(mbInitSucceeded);
+    return SendShimRequestWithResult(TWAIN_REQUEST_INITXFER);
+}
+
+void Twain::ShimListenerThread::NotifyOwner(WPARAM nEvent)
+{
+    if (!mbDontNotify)
+        aTwain.Notify(nEvent);
+}
+
+void Twain::ShimListenerThread::NotifyXFerOwner(LPARAM nHandle)
+{
+    if (!mbDontNotify)
+        aTwain.NotifyXFer(nHandle);
+}
+
+// May only be called from the own thread, so no threading issues modifying self
+void Twain::ShimListenerThread::NotificationHdl(WPARAM nEvent, LPARAM lParam)
+{
+    switch (nEvent)
+    {
+        case TWAIN_EVENT_NOTIFYHWND: // shim reported its main HWND for communications
+            if (!mcInitCompleted.check()) // only if not yet initialized!
+            {
+                // Owner is still waiting mcInitCompleted in its Twain::InitializeNewShim,
+                // holding its access mutex
+                mhWndShim = reinterpret_cast<HWND>(lParam);
+
+                mbInitSucceeded = lParam != 0;
+                mcInitCompleted.set();
+            }
+            break;
+        case TWAIN_EVENT_SCANNING:
+            NotifyOwner(nEvent);
+            break;
+        case TWAIN_EVENT_XFER:
+            NotifyXFerOwner(lParam);
+            break;
+        case TWAIN_EVENT_REQUESTRESULT:
+            mbRequestResult = lParam;
+            mcGotRequestResult.set();
+            break;
+            // We don't handle TWAIN_EVENT_QUIT notification from shim, because we send it ourselves
+            // in the end of execute()
+    }
+}
+
+// Spawn a separate 32-bit process to use TWAIN on Windows, and listen for its notifications
+void Twain::ShimListenerThread::execute()
+{
+    MSG msg;
+    // Initialize thread message queue before launching shim process
+    PeekMessageW(&msg, nullptr, 0, 0, PM_NOREMOVE);
+
+    try
+    {
+        ScopedHANDLE hShimProcess;
+        {
+            // Determine twain32shim executable URL:
+            OUString shimURL("$BRAND_BASE_DIR/" LIBO_BIN_FOLDER "/twain32shim.exe");
+            rtl::Bootstrap::expandMacros(shimURL);
+
+            OUString sCmdLine;
+            if (osl::FileBase::getSystemPathFromFileURL(shimURL, sCmdLine) != osl::FileBase::E_None)
+                throw std::exception("getSystemPathFromFileURL failed!");
+
+            HANDLE hDup;
+            if (!DuplicateHandle(GetCurrentProcess(), GetCurrentThread(), GetCurrentProcess(),
+                                 &hDup, SYNCHRONIZE | THREAD_QUERY_LIMITED_INFORMATION, TRUE, 0))
+                ThrowLastError("DuplicateHandle");
+            // we will not need our copy as soon as shim has its own inherited one
+            ScopedHANDLE hScopedDup(hDup);
+            DWORD nDup = static_cast<DWORD>(reinterpret_cast<sal_uIntPtr>(hDup));
+            if (reinterpret_cast<HANDLE>(nDup) != hDup)
+                throw std::exception("HANDLE does not fit to 32 bit - cannot pass to shim!");
+
+            // Send this thread handle as the first parameter
+            sCmdLine = "\"" + sCmdLine + "\" " + OUString::number(nDup);
+
+            // We need a WinAPI HANDLE of the process to be able to wait on it and detect the process
+            // termination; so use WinAPI to start the process, not osl_executeProcess.
+
+            STARTUPINFOW si{};
+            si.cb = sizeof(si);
+            PROCESS_INFORMATION pi;
+
+            if (!CreateProcessW(nullptr, const_cast<LPWSTR>(o3tl::toW(sCmdLine.getStr())), nullptr,
+                                nullptr, TRUE, CREATE_NO_WINDOW, nullptr, nullptr, &si, &pi))
+                ThrowLastError("CreateProcessW");
+
+            CloseHandle(pi.hThread);
+            hShimProcess.reset(pi.hProcess);
+        }
+        HANDLE h = hShimProcess.get();
+        while (true)
+        {
+            DWORD nWaitResult = MsgWaitForMultipleObjects(1, &h, FALSE, INFINITE, QS_POSTMESSAGE);
+            // Process any messages in queue before checking if we need to break, to not loose
+            // possible pending notifications
+            while (PeekMessageW(&msg, nullptr, 0, 0, PM_REMOVE))
+            {
+                // process it here
+                if (msg.message == WM_TWAIN_EVENT)
+                {
+                    NotificationHdl(msg.wParam, msg.lParam);
+                }
+            }
+            if (nWaitResult == WAIT_OBJECT_0)
+            {
+                // shim process exited - return
+                break;
+            }
+            if (nWaitResult == WAIT_FAILED)
+            {
+                // Some Win32 error - report and return
+                ThrowLastError("MsgWaitForMultipleObjects");
+            }
+        }
+    }
+    catch (const std::exception& e)
+    {
+        msErrorReported = OUString(e.what(), strlen(e.what()), RTL_TEXTENCODING_UTF8);
+        // allow owner to resume (in case the condition isn't set yet)
+        mcInitCompleted.set(); // let mbInitSucceeded keep its (maybe false) value!
+    }
+    // allow owner to resume (in case the conditions isn't set yet)
+    mcGotRequestResult.set();
+    NotifyOwner(TWAIN_EVENT_QUIT);
+}
+
+Twain::Twain() {}
+
+Twain::~Twain()
+{
+    osl::MutexGuard aGuard(maMutex);
+    if (mpThread)
+    {
+        mpThread->DontNotify();
+        mpThread->RequestDestroy();
+        mpThread->join();
+        mpThread.clear();
+    }
+}
+
+void Twain::Reset()
+{
+    mpThread->join();
+    if (!mpThread->getError().isEmpty())
+        SAL_WARN("extensions.scanner", mpThread->getError());
+    mpThread.clear();
+    mpCurMgr = nullptr;
+    mxMgr.clear();
+}
+
+bool Twain::InitializeNewShim(ScannerManager& rMgr, const VclPtr<vcl::Window>& xTopWindow)
+{
+    osl::MutexGuard aGuard(maMutex);
+    if (mpThread)
+        return false; // Have a shim for another task already!
+
+    // hold reference to ScannerManager, to prevent premature death
+    mxMgr = mpCurMgr = &rMgr;
+
+    mpThread.set(new ShimListenerThread(xTopWindow));
+    mpThread->launch();
+    const bool bSuccess = mpThread->WaitInitialization();
+    if (!bSuccess)
+        Reset();
+
+    return bSuccess;
+}
+
+void Twain::Notify(WPARAM nEvent)
+{
+    Application::PostUserEvent(LINK(this, Twain, ImpNotifyHdl), reinterpret_cast<void*>(nEvent));
+}
+
+void Twain::NotifyXFer(LPARAM nHandle)
+{
+    Application::PostUserEvent(LINK(this, Twain, ImpNotifyXferHdl),
+                               reinterpret_cast<void*>(nHandle));
+}
+
+bool Twain::SelectSource(ScannerManager& rMgr, const VclPtr<vcl::Window>& xTopWindow)
+{
+    osl::MutexGuard aGuard(maMutex);
+    bool bRet = false;
+
+    if (InitializeNewShim(rMgr, xTopWindow))
+    {
+        meState = TWAIN_STATE_NONE;
+        bRet = mpThread->RequestSelectSource();
+    }
+
+    return bRet;
+}
+
+bool Twain::PerformTransfer(ScannerManager& rMgr,
+                            const css::uno::Reference<css::lang::XEventListener>& rxListener,
+                            const VclPtr<vcl::Window>& xTopWindow)
+{
+    osl::MutexGuard aGuard(maMutex);
+    bool bRet = false;
+
+    if (InitializeNewShim(rMgr, xTopWindow))
+    {
+        mxListener = rxListener;
+        meState = TWAIN_STATE_NONE;
+        bRet = mpThread->RequestInitXfer();
+    }
+
+    return bRet;
+}
+
+void Twain::WaitReadyForNextTask()
+{
+    while ([&]() {
+        osl::MutexGuard aGuard(maMutex);
+        return bool(mpThread);
+    }())
+    {
+        Application::Reschedule(true);
+    }
+}
+
+IMPL_LINK(Twain, ImpNotifyHdl, void*, pParam, void)
+{
+    osl::MutexGuard aGuard(maMutex);
+    WPARAM nEvent = reinterpret_cast<WPARAM>(pParam);
+    switch (nEvent)
+    {
+        case TWAIN_EVENT_SCANNING:
+            meState = TWAIN_STATE_SCANNING;
+            break;
+
+        case TWAIN_EVENT_QUIT:
+        {
+            if (meState != TWAIN_STATE_DONE)
+                meState = TWAIN_STATE_CANCELED;
+
+            css::lang::EventObject event(mxMgr); // mxMgr will be cleared below
+
+            if (mpThread)
+                Reset();
+
+            if (mxListener.is())
+            {
+                mxListener->disposing(event);
+                mxListener.clear();
+            }
+        }
+        break;
+
+        default:
+            break;
+    }
+}
+
+IMPL_LINK(Twain, ImpNotifyXferHdl, void*, pParam, void)
+{
+    osl::MutexGuard aGuard(maMutex);
+    if (mpThread)
+    {
+        mpCurMgr->SetData(pParam);
+        meState = pParam ? TWAIN_STATE_DONE : TWAIN_STATE_CANCELED;
+
+        css::lang::EventObject event(mxMgr); // mxMgr will be cleared below
+
+        Reset();
+
+        if (mxListener.is())
+            mxListener->disposing(css::lang::EventObject(mxMgr));
+    }
+
+    mxListener.clear();
+}
+
+VclPtr<vcl::Window> ImplGetActiveFrameWindow()
+{
+    try
+    {
+        // query desktop instance
+        css::uno::Reference<css::frame::XDesktop2> xDesktop
+            = css::frame::Desktop::create(comphelper::getProcessComponentContext());
+        if (css::uno::Reference<css::frame::XFrame> xActiveFrame = xDesktop->getActiveFrame())
+            return VCLUnoHelper::GetWindow(xActiveFrame->getComponentWindow());
+    }
+    catch (const css::uno::Exception&)
+    {
+    }
+    SAL_WARN("extensions.scanner", "ImplGetActiveFrame: Could not determine active frame!");
+    return nullptr;
+}
+
+} // namespace
+
+void ScannerManager::AcquireData() {}
+
+void ScannerManager::ReleaseData()
+{
+    if (mpData)
+    {
+        CloseHandle(static_cast<HANDLE>(mpData));
+        mpData = nullptr;
+    }
+}
+
+css::awt::Size ScannerManager::getSize()
+{
+    css::awt::Size aRet;
+
+    if (mpData)
+    {
+        HANDLE hMap = static_cast<HANDLE>(mpData);
+        // map full size
+        const sal_Int8* pMap = static_cast<sal_Int8*>(MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0));
+        if (pMap)
+        {
+            const BITMAPINFOHEADER* pBIH = reinterpret_cast<const BITMAPINFOHEADER*>(pMap + 4);
+            aRet.Width = pBIH->biWidth;
+            aRet.Height = pBIH->biHeight;
+
+            UnmapViewOfFile(pMap);
+        }
+    }
+
+    return aRet;
+}
+
+css::uno::Sequence<sal_Int8> ScannerManager::getDIB()
+{
+    css::uno::Sequence<sal_Int8> aRet;
+
+    if (mpData)
+    {
+        HANDLE hMap = static_cast<HANDLE>(mpData);
+        // map full size
+        const sal_Int8* pMap = static_cast<sal_Int8*>(MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0));
+        if (pMap)
+        {
+            DWORD nDIBSize;
+            memcpy(&nDIBSize, pMap, 4); // size of the following DIB
+
+            const BITMAPINFOHEADER* pBIH = reinterpret_cast<const BITMAPINFOHEADER*>(pMap + 4);
+
+            sal_uInt32 nColEntries = 0;
+
+            switch (pBIH->biBitCount)
+            {
+                case 1:
+                case 4:
+                case 8:
+                    nColEntries = pBIH->biClrUsed ? pBIH->biClrUsed : (1 << pBIH->biBitCount);
+                    break;
+
+                case 24:
+                    nColEntries = pBIH->biClrUsed ? pBIH->biClrUsed : 0;
+                    break;
+
+                case 16:
+                case 32:
+                    nColEntries = pBIH->biClrUsed;
+                    if (pBIH->biCompression == BI_BITFIELDS)
+                        nColEntries += 3;
+                    break;
+            }
+
+            aRet = css::uno::Sequence<sal_Int8>(sizeof(BITMAPFILEHEADER) + nDIBSize);
+
+            sal_Int8* pBuf = aRet.getArray();
+            SvMemoryStream* pMemStm
+                = new SvMemoryStream(pBuf, sizeof(BITMAPFILEHEADER), StreamMode::WRITE);
+
+            pMemStm->WriteChar('B').WriteChar('M').WriteUInt32(0).WriteUInt32(0);
+            pMemStm->WriteUInt32(sizeof(BITMAPFILEHEADER) + pBIH->biSize
+                                 + (nColEntries * sizeof(RGBQUAD)));
+
+            delete pMemStm;
+            memcpy(pBuf + sizeof(BITMAPFILEHEADER), pBIH, nDIBSize);
+
+            UnmapViewOfFile(pMap);
+        }
+
+        ReleaseData();
+    }
+
+    return aRet;
+}
+
+css::uno::Sequence<ScannerContext> SAL_CALL ScannerManager::getAvailableScanners()
+{
+    osl::MutexGuard aGuard(maProtector);
+    css::uno::Sequence<ScannerContext> aRet(1);
+
+    aRet.getArray()[0].ScannerName = "TWAIN";
+    aRet.getArray()[0].InternalData = 0;
+
+    return aRet;
+}
+
+sal_Bool SAL_CALL ScannerManager::configureScannerAndScan(
+    ScannerContext& rContext, const css::uno::Reference<css::lang::XEventListener>& rxListener)
+{
+    osl::MutexGuard aGuard(maProtector);
+    css::uno::Reference<XScannerManager> xThis(this);
+
+    if (rContext.InternalData != 0 || rContext.ScannerName != "TWAIN")
+        throw ScannerException("Scanner does not exist", xThis, ScanError_InvalidContext);
+
+    ReleaseData();
+
+    VclPtr<vcl::Window> xTopWindow = ImplGetActiveFrameWindow();
+    if (xTopWindow)
+        xTopWindow
+            ->IncModalCount(); // to avoid changes between the two operations that each block the window
+    comphelper::ScopeGuard aModalGuard([xTopWindow]() {
+        if (xTopWindow)
+            xTopWindow->DecModalCount();
+    });
+
+    const bool bSelected = aTwain.SelectSource(*this, xTopWindow);
+    if (bSelected)
+    {
+        aTwain.WaitReadyForNextTask();
+        aTwain.PerformTransfer(*this, rxListener, xTopWindow);
+    }
+    return bSelected;
+}
+
+void SAL_CALL
+ScannerManager::startScan(const ScannerContext& rContext,
+                          const css::uno::Reference<css::lang::XEventListener>& rxListener)
+{
+    osl::MutexGuard aGuard(maProtector);
+    css::uno::Reference<XScannerManager> xThis(this);
+
+    if (rContext.InternalData != 0 || rContext.ScannerName != "TWAIN")
+        throw ScannerException("Scanner does not exist", xThis, ScanError_InvalidContext);
+
+    ReleaseData();
+    aTwain.PerformTransfer(*this, rxListener, ImplGetActiveFrameWindow());
+}
+
+ScanError SAL_CALL ScannerManager::getError(const ScannerContext& rContext)
+{
+    osl::MutexGuard aGuard(maProtector);
+    css::uno::Reference<XScannerManager> xThis(this);
+
+    if (rContext.InternalData != 0 || rContext.ScannerName != "TWAIN")
+        throw ScannerException("Scanner does not exist", xThis, ScanError_InvalidContext);
+
+    return ((aTwain.GetState() == TWAIN_STATE_CANCELED) ? ScanError_ScanCanceled
+                                                        : ScanError_ScanErrorNone);
+}
+
+css::uno::Reference<css::awt::XBitmap>
+    SAL_CALL ScannerManager::getBitmap(const ScannerContext& /*rContext*/)
+{
+    osl::MutexGuard aGuard(maProtector);
+    return css::uno::Reference<css::awt::XBitmap>(this);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */