1 files changed, 270 insertions, 0 deletions
diff --git a/vcl/source/window/debugevent.cxx b/vcl/source/window/debugevent.cxx
new file mode 100644
index 000000000..c28cd84f8
--- /dev/null
+++ b/vcl/source/window/debugevent.cxx
@@ -0,0 +1,270 @@
+/* -*- 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/.
+ */
+
+#include <comphelper/random.hxx>
+#include <rtl/string.hxx>
+#include <sal/log.hxx>
+#include <vcl/keycodes.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/wrkwin.hxx>
+#include <vcl/menu.hxx>
+#include <debugevent.hxx>
+#include <window.h>
+#include <salwtype.hxx>
+
+DebugEventInjector::DebugEventInjector( sal_uInt32 nMaxEvents) :
+      Timer("debug event injector")
+    , mnEventsLeft( nMaxEvents )
+{
+    SetTimeout( 1000 /* ms */ );
+    Start();
+}
+
+static double getRandom()
+{
+    return comphelper::rng::uniform_real_distribution();
+}
+
+vcl::Window *DebugEventInjector::ChooseWindow()
+{
+    vcl::Window *pParent;
+
+    if (getRandom() < 0.80)
+        if (vcl::Window * pWindow = Application::GetFocusWindow())
+            return pWindow;
+
+    if (getRandom() > 0.50 ||
+        !(pParent = Application::GetActiveTopWindow()))
+    {
+        // select a top window at random
+        long nIdx = Application::GetTopWindowCount() * getRandom();
+        pParent = Application::GetTopWindow( nIdx );
+    }
+    assert (pParent != nullptr);
+
+    std::vector< vcl::Window *> aChildren;
+    pParent->CollectChildren( aChildren );
+
+    return aChildren[ aChildren.size() * getRandom() ];
+}
+
+
+static void CollectMenuItemIds( Menu *pMenu, std::vector< SalMenuEvent > &rIds )
+{
+    sal_uInt16 nItems = pMenu->GetItemCount();
+    for (sal_uInt16 i = 0; i < nItems; i++)
+    {
+        if (pMenu->GetItemType( i ) != MenuItemType::SEPARATOR || getRandom() < 0.01)
+            rIds.emplace_back( pMenu->GetItemId( i ), pMenu );
+        PopupMenu *pPopup = pMenu->GetPopupMenu( i );
+        if (pPopup)
+            CollectMenuItemIds( pPopup, rIds );
+    }
+}
+
+void DebugEventInjector::InjectMenuEvent()
+{
+    vcl::Window *pFocus = Application::GetFocusWindow();
+    if (!pFocus)
+        return;
+
+    SystemWindow *pSysWin = pFocus->GetSystemWindow();
+    if (!pSysWin)
+        return;
+
+    MenuBar *pMenuBar = pSysWin->GetMenuBar();
+    if (!pMenuBar)
+        return;
+
+    SalEvent nEvents[] = {
+        SalEvent::MenuCommand,
+        SalEvent::MenuCommand,
+        SalEvent::MenuActivate,
+        SalEvent::MenuDeactivate,
+        SalEvent::MenuHighlight,
+        SalEvent::MenuCommand,
+        SalEvent::MenuCommand,
+        SalEvent::MenuCommand,
+        SalEvent::MenuButtonCommand,
+        SalEvent::MenuButtonCommand,
+    };
+
+    std::vector< SalMenuEvent > aIds;
+    CollectMenuItemIds( pMenuBar, aIds );
+
+    SalEvent nEvent = nEvents[ static_cast<int>(getRandom() * SAL_N_ELEMENTS( nEvents )) ];
+    SalMenuEvent aEvent = aIds[ getRandom() * aIds.size() ];
+    bool bHandled = ImplWindowFrameProc( pSysWin, nEvent, &aEvent);
+
+    SAL_INFO( "vcl.debugevent",
+              "Injected menu event " << aEvent.mpMenu
+              << " (" << aEvent.mnId << ") '"
+              << static_cast<Menu *>(aEvent.mpMenu)->GetItemText( aEvent.mnId ) << "' -> "
+              << bHandled );
+}
+
+static void InitKeyEvent( SalKeyEvent &rKeyEvent )
+{
+    if (getRandom() < 0.01)
+        rKeyEvent.mnRepeat = getRandom() * 20;
+    else
+        rKeyEvent.mnRepeat = 0;
+}
+
+void DebugEventInjector::InjectTextEvent()
+{
+    SalKeyEvent aKeyEvent;
+    vcl::Window *pWindow = ChooseWindow();
+
+    InitKeyEvent( aKeyEvent );
+
+    if (getRandom() < 0.10) // Occasionally a truly random event
+    {
+        aKeyEvent.mnCode = getRandom() * KEY_CODE_MASK;
+        aKeyEvent.mnCharCode = getRandom() * 0xffff;
+    }
+    else
+    {
+        static struct {
+            sal_uInt16 nCodeStart, nCodeEnd;
+            char aCharStart;
+        } const nTextCodes[] = {
+            { KEY_0, KEY_9, '0' },
+            { KEY_A, KEY_Z, 'a' }
+        };
+
+        size_t i = getRandom() * SAL_N_ELEMENTS( nTextCodes );
+        int offset = int( getRandom() * ( nTextCodes[i].nCodeEnd - nTextCodes[i].nCodeStart ) );
+        aKeyEvent.mnCode = nTextCodes[i].nCodeStart + offset;
+        aKeyEvent.mnCharCode = nTextCodes[i].aCharStart + offset;
+//        fprintf( stderr, "Char '%c' offset %d into record %d base '%c'\n",
+//                 aKeyEvent.mnCharCode, offset, (int)i, nTextCodes[i].aCharStart );
+    }
+
+    if( getRandom() < 0.05 ) // modifier
+        aKeyEvent.mnCode |= static_cast<sal_uInt16>( getRandom() * KEY_MODIFIERS_MASK ) & KEY_MODIFIERS_MASK;
+
+    bool bHandled = ImplWindowFrameProc( pWindow, SalEvent::KeyInput, &aKeyEvent);
+
+    SAL_INFO( "vcl.debugevent",
+              "Injected key 0x" << std::hex << static_cast<int>(aKeyEvent.mnCode) << std::dec
+              << " -> " << bHandled
+              << " win " << pWindow );
+
+    ImplWindowFrameProc( pWindow, SalEvent::KeyUp, &aKeyEvent );
+}
+
+/*
+ *   The more heuristics we have to inform this the better,
+ * key-bindings, menu entries, allowable entry types etc.
+ */
+void DebugEventInjector::InjectEvent()
+{
+//    fprintf( stderr, "%6d - ", (int)mnEventsLeft );
+
+    double nRand = getRandom();
+    if (nRand < 0.30)
+    {
+        int nEvents = getRandom() * 10;
+        for (int i = 0; i < nEvents; i++)
+            InjectTextEvent();
+    }
+    else if (nRand < 0.60)
+        InjectKeyNavEdit();
+    else if (nRand < 0.95)
+        InjectMenuEvent();
+}
+
+void DebugEventInjector::InjectKeyNavEdit()
+{
+    vcl::Window *pWindow = ChooseWindow();
+
+    static struct {
+        double     mnProb;
+        sal_uInt16 mnKey;
+    } const nWeights[] = {
+        // edit / escape etc. - 50%
+        { 0.20, KEY_SPACE },
+        { 0.10, KEY_TAB },
+        { 0.07, KEY_RETURN },
+        { 0.05, KEY_DELETE },
+        { 0.05, KEY_BACKSPACE },
+
+        // navigate - 45%
+        { 0.15, KEY_LEFT },
+        { 0.10, KEY_RIGHT },
+        { 0.05, KEY_UP },
+        { 0.05, KEY_DOWN },
+        { 0.05, KEY_PAGEUP },
+        { 0.05, KEY_PAGEDOWN },
+
+        // other
+        { 0.01, KEY_INSERT },
+        { 0.02, KEY_HOME },
+        { 0.02, KEY_END },
+    };
+
+    double d = 0.0, nRand = getRandom();
+    sal_uInt16 nKey = KEY_SPACE;
+    for (auto & rWeight : nWeights)
+    {
+        d += rWeight.mnProb;
+        assert (d < 1.01);
+        if ( nRand < d )
+        {
+            nKey = rWeight.mnKey;
+            break;
+        }
+    }
+
+    SalKeyEvent aKeyEvent;
+    InitKeyEvent( aKeyEvent );
+    aKeyEvent.mnCode = nKey;
+
+    if (getRandom() < 0.15) // modifier
+        aKeyEvent.mnCode |= static_cast<sal_uInt16>(getRandom() * KEY_MODIFIERS_MASK) & KEY_MODIFIERS_MASK;
+
+    aKeyEvent.mnCharCode = 0x0; // hopefully unused.
+
+    bool bHandled = ImplWindowFrameProc( pWindow, SalEvent::KeyInput, &aKeyEvent );
+
+    SAL_INFO( "vcl.debugevent",
+              "Injected edit / move key 0x" << std::hex << static_cast<int>(aKeyEvent.mnCode) << std::dec
+              << " -> " << bHandled
+              << " win " <<  pWindow );
+    ImplWindowFrameProc( pWindow, SalEvent::KeyUp, &aKeyEvent );
+}
+
+void DebugEventInjector::Invoke()
+{
+    InjectEvent();
+    mnEventsLeft--;
+    if (mnEventsLeft > 0)
+    {
+        SetTimeout( 1 );
+        Start();
+    }
+    else
+        Application::Quit();
+}
+
+DebugEventInjector *DebugEventInjector::getCreate()
+{
+    sal_uInt32 nEvents;
+    const char *pEvents = getenv("VCL_EVENT_INJECTION");
+    if (!pEvents)
+        return nullptr;
+    nEvents = OString( pEvents ).toUInt32();
+    if (nEvents > 0)
+        return new DebugEventInjector( nEvents );
+    else
+        return nullptr;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */