Support for clipboard between Qt and Symbian applications

Clipboard now supports copying text between Qt and Symbian applications.
Text is always copied to QClipboard and to Symbian clipboard. If
QClipboard is empty, Symbian clipboard is checked and text is pasted
from there. Corresponding test cases added.

Task-number: QT-2085
Reviewed-by: Janne Koskinen

Merge-request: 870
Reviewed-by: Janne Koskinen <janne.p.koskinen@digia.com>

1 files changed, 75 insertions, 10 deletions

diff --git a/src/gui/kernel/qclipboard_s60.cpp b/src/gui/kernel/qclipboard_s60.cpp
index f07e066..7b145a8 100644
--- a/src/gui/kernel/qclipboard_s60.cpp
+++ b/src/gui/kernel/qclipboard_s60.cpp
@@ -50,16 +50,15 @@
 #include "qwidget.h"
 #include "qevent.h"
 #include "private/qcore_symbian_p.h"
+#include "txtetext.h"
 #include <QtDebug>
 
 // Symbian's clipboard
 #include <baclipb.h>
 QT_BEGIN_NAMESPACE
 
-//###  Mime Type mapping to UIDs
-
 const TUid KQtCbDataStream = {0x2001B2DD};
-
+const TInt KPlainTextBegin = 0;
 
 class QClipboardData
 {
@@ -141,7 +140,6 @@ void writeToStreamLX(const QMimeData* aData, RWriteStream& aStream)
     {
         HBufC* stringData = TPtrC(reinterpret_cast<const TUint16*>((*iter).utf16())).AllocLC();
         QByteArray ba = aData->data((*iter));
-        qDebug() << "copy to clipboard mime: " << *iter << " data: " << ba;
         // mime type
         aStream << TCardinality(stringData->Size());
         aStream << *(stringData);
@@ -152,6 +150,43 @@ void writeToStreamLX(const QMimeData* aData, RWriteStream& aStream)
     }
 }
 
+void writeToSymbianStoreLX(const QMimeData* aData, CClipboard* clipboard)
+{
+    // This function both leaves and throws exceptions. There must be no destructor
+    // dependencies between cleanup styles, and no cleanup stack dependencies on stacked objects.
+    if (aData->hasText()) {
+        CPlainText* text = CPlainText::NewL();
+        CleanupStack::PushL(text);
+
+        TPtrC textPtr(qt_QString2TPtrC(aData->text()));
+        text->InsertL(KPlainTextBegin, textPtr);
+        text->CopyToStoreL(clipboard->Store(), clipboard->StreamDictionary(),
+                           KPlainTextBegin, textPtr.Length());
+        CleanupStack::PopAndDestroy(text);
+    }
+}
+
+void readSymbianStoreLX(QMimeData* aData, CClipboard* clipboard)
+{
+    // This function both leaves and throws exceptions. There must be no destructor
+    // dependencies between cleanup styles, and no cleanup stack dependencies on stacked objects.
+    CPlainText* text = CPlainText::NewL();
+    CleanupStack::PushL(text);
+    TInt dataLength = text->PasteFromStoreL(clipboard->Store(), clipboard->StreamDictionary(),
+                                            KPlainTextBegin);
+    if (dataLength == 0) {
+        User::Leave(KErrNotFound);
+    }
+    HBufC* hBuf = HBufC::NewL(dataLength);
+    TPtr buf = hBuf->Des();
+    text->Extract(buf, KPlainTextBegin, dataLength);
+
+    QString string = qt_TDesC2QString(buf);
+    CleanupStack::PopAndDestroy(text);
+
+    aData->setText(string);
+}
+
 void readFromStreamLX(QMimeData* aData,RReadStream& aStream)
 {
     // This function both leaves and throws exceptions. There must be no destructor
@@ -174,7 +209,6 @@ void readFromStreamLX(QMimeData* aData,RReadStream& aStream)
         ba.reserve(dataSize);
         aStream.ReadL(reinterpret_cast<uchar*>(ba.data_ptr()->data),dataSize);
         ba.data_ptr()->size = dataSize;
-        qDebug() << "paste from clipboard mime: " << mimeType << " data: " << ba;
         aData->setData(mimeType,ba);
     }
 }
@@ -192,18 +226,41 @@ const QMimeData* QClipboard::mimeData(Mode mode) const
 {
     if (mode != Clipboard) return 0;
     QClipboardData *d = clipboardData();
+    bool dataExists(false);
     if (d)
     {
         TRAPD(err,{
             RFs fs = qt_s60GetRFs();
             CClipboard* cb = CClipboard::NewForReadingLC(fs);
             Q_ASSERT(cb);
+            //stream for qt
             RStoreReadStream stream;
             TStreamId stid = (cb->StreamDictionary()).At(KQtCbDataStream);
-            stream.OpenLC(cb->Store(),stid);
-            QT_TRYCATCH_LEAVING(readFromStreamLX(d->source(),stream));
-            CleanupStack::PopAndDestroy(2,cb);
-            return d->source();
+            if (stid != 0) {
+                stream.OpenLC(cb->Store(),stid);
+                QT_TRYCATCH_LEAVING(readFromStreamLX(d->source(),stream));
+                CleanupStack::PopAndDestroy(&stream);
+                dataExists = true;
+            }
+            else {
+                //symbian clipboard
+                RStoreReadStream symbianStream;
+                TStreamId symbianStId = (cb->StreamDictionary()).At(KClipboardUidTypePlainText);
+                if (symbianStId != 0) {
+                    symbianStream.OpenLC(cb->Store(), symbianStId);
+                    QT_TRYCATCH_LEAVING(readSymbianStoreLX(d->source(), cb));
+                    CleanupStack::PopAndDestroy(&symbianStream);
+                    dataExists = true;
+                }
+            }
+            CleanupStack::PopAndDestroy(cb);
+            if (dataExists) {
+                return d->source();
+            }
+            else {
+                return 0;
+            }
+
         });
         if (err != KErrNone){
             qDebug()<< "clipboard is empty/err: " << err;
@@ -223,6 +280,7 @@ void QClipboard::setMimeData(QMimeData* src, Mode mode)
         TRAPD(err,{
             RFs fs = qt_s60GetRFs();
             CClipboard* cb = CClipboard::NewForWritingLC(fs);
+            //stream for qt
             RStoreWriteStream  stream;
             TStreamId stid = stream.CreateLC(cb->Store());
             QT_TRYCATCH_LEAVING(writeToStreamLX(src,stream));
@@ -230,7 +288,14 @@ void QClipboard::setMimeData(QMimeData* src, Mode mode)
             stream.CommitL();
             (cb->StreamDictionary()).AssignL(KQtCbDataStream,stid);
             cb->CommitL();
-            CleanupStack::PopAndDestroy(2,cb);
+
+            //stream for symbian
+            RStoreWriteStream symbianStream;
+            TStreamId symbianStId = symbianStream.CreateLC(cb->Store());
+            QT_TRYCATCH_LEAVING(writeToSymbianStoreLX(src, cb));
+            (cb->StreamDictionary()).AssignL(KClipboardUidTypePlainText, symbianStId);
+            cb->CommitL();
+            CleanupStack::PopAndDestroy(3,cb);
         });
         if (err != KErrNone){
             qDebug()<< "clipboard write err :" << err;