--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/lcdui_akn/javalcdui/src/CMIDBuffer.cpp	Tue Apr 27 16:30:29 2010 +0300
@@ -0,0 +1,260 @@
+/*
+* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+
+#include "CMIDBuffer.h"
+#include "CMIDToolkit.h"
+#ifdef RD_JAVA_NGA_ENABLED
+#include "monitor.h"
+#endif
+#include <jdebug.h>
+
+#if defined(_DEBUG) && defined(_TRACE)
+#define TRACE(x) RDebug::Print(_L(x))
+#else
+#define TRACE(x)
+#endif
+
+enum TBufferPriority
+{
+    EBufferPriorityNormal=0,
+    EBufferPriorityHigh=20,
+    EBufferPriorityRedraw=50,    // == EActivePriorityRedrawEvents
+    EBufferPriorityInput=100    // == EActivePriorityWsEvents -> could starve key events.
+};
+
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+TInt CMIDBuffer::New(JNIEnv& aJni, jobject aPeer, TJavaEventServer aServer)
+{
+    TInt handle;
+    TRAP(handle,
+         TConstructor self(aJni);
+         self->ConstructJniL(aJni,aPeer,aServer);
+         handle = self.GetHandle();
+        );
+    return handle;
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+CMIDBuffer::CMIDBuffer()
+        : iState(EClosed)
+{
+    iBufferEnd = &iBuffer[ KBufferSize ];
+    iRead      = iBuffer;
+    iReadEnd   = iBuffer;
+    iProcEnd   = iBuffer;
+    iState = EComplete;
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+CMIDBuffer::~CMIDBuffer()
+{
+#ifdef RD_JAVA_NGA_ENABLED
+    delete iMonitor;
+#endif
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+void CMIDBuffer::RequestProcess(JNIEnv& aEnv, jintArray aBuffer, TInt aCount)
+{
+    ASSERT(aCount <= Size());
+
+    aEnv.GetIntArrayRegion(aBuffer, 0, aCount, reinterpret_cast<jint*>(iBuffer));
+    iRead    = &iBuffer[0];
+    iReadEnd = iRead + aCount;
+    iProcEnd = iRead;
+    iState   = ENewRequest;
+#ifdef RD_JAVA_NGA_ENABLED
+    TBool async = Execute(CMIDBuffer::DoProcess, this);
+    if (async)
+    {
+        iMonitor->wait();
+    }
+#else
+    ExecuteTrap(CMIDBuffer::DoProcessL, this);
+#endif
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+#ifdef RD_JAVA_NGA_ENABLED
+TBool CMIDBuffer::DoProcess(CMIDBuffer* aBuffer)
+{
+    TBool ret = EFalse;
+    TRAPD(err, ret = aBuffer->ProcessL());
+    if (err != KErrNone)
+    {
+        ret = EFalse;
+    }
+    return ret;
+}
+#else
+void CMIDBuffer::DoProcessL(CMIDBuffer* aBuffer)
+{
+    aBuffer->ProcessL();
+}
+#endif
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+void CMIDBuffer::ConstructJniL(JNIEnv& aJni, jobject aPeer, TJavaEventServer aServer)
+{
+    CJavaEventSourceBase::ConstructL(aJni, aPeer, aServer);
+#ifdef RD_JAVA_NGA_ENABLED
+    try
+    {
+        iMonitor = java::util::Monitor::createMonitor();
+    }
+    catch (std::exception& e)
+    {
+        User::Leave(KErrNoMemory);
+    }
+#endif
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+void CMIDBuffer::FinalizeJni(JNIEnv& /*aEnv*/)
+{
+    ASSERT(iState == EComplete);
+    iState = EClosed;
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+#ifdef RD_JAVA_NGA_ENABLED
+TBool CMIDBuffer::ProcessL()
+#else
+void CMIDBuffer::ProcessL()
+#endif
+{
+    iCycles = KTotalCycles;
+
+#ifdef RD_JAVA_NGA_ENABLED
+    TBool ret = EFalse;
+#endif
+
+    if (!iRead->IsActivate())
+    {
+        ELOG1(EJavaUI, "Buffer didn't start with header! %X", iRead->Header());
+        User::Leave(KErrCorrupt);
+    }
+    while (iRead < iReadEnd)
+    {
+        const TMIDBufferOp* blockEnd = NULL;
+
+        // Either setup a new buffer processor, or continue the current
+        // processor after a defer, or a leave.
+        if (iRead->IsActivate())
+        {
+            MMIDComponent* component = MIDUnhand<MMIDComponent>(iRead->Header()&0x7fffffff);
+            iProcessor = component->Processor();
+
+            // Skip activation header.
+            ++iRead;
+
+            const TInt words = *reinterpret_cast<const TInt*>(iRead);
+
+            // Skip activation length
+            ++iRead;
+
+            blockEnd = iRead + words;
+
+            iProcEnd = blockEnd;
+
+            ASSERT(iProcEnd <= iReadEnd);
+        }
+
+        if (iRead < iReadEnd)
+        {
+#ifdef RD_JAVA_NGA_ENABLED
+            // SYNC or SYNC_RECT op codes are sent to only one object at a time,
+            // so it is safe to have only one boolean indicating async operation.
+            // Currently only Canvas does asyncronous flush.
+            TBool async = iProcessor->ProcessL(iRead, iProcEnd, iCycles, iMonitor);
+            ret |= async;
+#else
+            iProcessor->ProcessL(iRead, iProcEnd, iCycles);
+#endif
+        }
+
+        // Must have reached end of processor range.
+        ASSERT(iRead == iProcEnd);
+
+        // Next command must be an activate or we must have reached
+        // the end of the buffer.
+        ASSERT((iRead == iReadEnd) || iRead->IsActivate());
+    }
+
+    Complete();
+
+#ifdef RD_JAVA_NGA_ENABLED
+    return ret;
+#endif
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+void CMIDBuffer::Cancel()
+{
+    //
+    // Cancel any async operation a processor may be doing.
+    //
+    if (iState == EAsyncPending)
+    {
+        if (iProcessor)
+        {
+            iProcessor->AbortAsync();
+        }
+    }
+    iState = ECancelled;
+}
+
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+void CMIDBuffer::Complete()
+{
+    ASSERT(iRead == iReadEnd);
+    iRead    = iBuffer;
+    iReadEnd = iBuffer;
+    iProcEnd = iBuffer;
+    iState   = EComplete;
+    iError   = KErrNone;
+}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+inline TInt CMIDBuffer::Size() const
+{
+    return iBufferEnd - iBuffer;
+}