Debugger/CDB: Increase limits on string size in watch data.

Introduce truncation in item view instead (full value visible in
ToolTip).

Reviewed-by: hjk
Task-number: QTCREATORBUG-305

src/plugins/debugger/cdb/cdbsymbolgroupcontext.cpp

@@ -750,9 +750,10 @@ static inline bool getUnsignedHexValue(CIDebugSymbolGroup *sg, int index, quint6
     return getUnsignedHexValue(stringValue, value);
 }
 
+enum { maxStringLength = 4096 };
+
 int CdbSymbolGroupContext::dumpQString(CIDebugDataSpaces *ds, WatchData *wd)
 {
-    const int maxLength = 40;
     QString errorMessage;
     unsigned long stringIndex;
     if (!lookupPrefix(wd->iname, &stringIndex))
@@ -774,9 +775,9 @@ int CdbSymbolGroupContext::dumpQString(CIDebugDataSpaces *ds, WatchData *wd)
     if (!getUnsignedHexValue(m_symbolGroup, arrayIndex, &array))
         return 5;
     // Fetch
-    const bool truncated = size > maxLength;
+    const bool truncated = size > maxStringLength;
     if (truncated)
-        size = maxLength;
+        size = maxStringLength;
     const QChar doubleQuote = QLatin1Char('"');
     QString value;
     if (size > 0) {
@@ -808,7 +809,6 @@ int CdbSymbolGroupContext::dumpQString(CIDebugDataSpaces *ds, WatchData *wd)
 
 int CdbSymbolGroupContext::dumpStdString(WatchData *wd)
 {
-    const int maxLength = 40;
     QString errorMessage;
     unsigned long stringIndex;
     if (!lookupPrefix(wd->iname, &stringIndex))
@@ -835,8 +835,8 @@ int CdbSymbolGroupContext::dumpStdString(WatchData *wd)
     if (quotePos == -1)
         return 1;
     bufValue.remove(0, quotePos);
-    if (bufValue.size() > maxLength) {
-        bufValue.truncate(maxLength);
+    if (bufValue.size() > maxStringLength) {
+        bufValue.truncate(maxStringLength);
         bufValue += QLatin1String("...\"");
     }
     wd->setValue(bufValue);

src/plugins/debugger/watchhandler.cpp

@@ -727,6 +727,18 @@ void WatchModel::emitDataChanged(int column, const QModelIndex &parentIndex)
         emitDataChanged(column, index(i, 0, parentIndex));
 }
 
+// Truncate value for item view, maintaining quotes
+static inline QString truncateValue(QString v)
+{
+    enum { maxLength = 512 };
+    if (v.size() < maxLength)
+        return v;
+    const bool isQuoted = v.endsWith(QLatin1Char('"')); // check for 'char* "Hallo"'
+    v.truncate(maxLength);
+    v += isQuoted ? QLatin1String("...\"") : QLatin1String("...");
+    return v;
+}
+
 QVariant WatchModel::data(const QModelIndex &idx, int role) const
 {
     const WatchItem &data = *watchItem(idx);
@@ -735,9 +747,9 @@ QVariant WatchModel::data(const QModelIndex &idx, int role) const
         case Qt::DisplayRole: {
             switch (idx.column()) {
                 case 0: return data.name;
-                case 1: return formattedValue(data,
+                case 1: return truncateValue(formattedValue(data,
                     m_handler->m_individualFormats.value(data.iname, -1),
-                    m_handler->m_typeFormats.value(data.type, -1));
+                    m_handler->m_typeFormats.value(data.type, -1)));
                 case 2:
                     if (!data.displayedType.isEmpty())
                         return data.displayedType;