qmlplugindump: Describe meta object revisions of exported types.

Adds the exportMetaObjectRevisions property to generated qmltypes files.

Change-Id: Iafe2fe408c88bb6dd02cbb558404a5f654431248
Reviewed-on: http://codereview.qt-project.org/5311
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

doc/src/declarative/modules.qdoc

@@ -445,6 +445,13 @@ Module {
             "QtQuick/Animation 1.0"
         ]
 
+        // The meta object revisions for the exports specified in 'exports'.
+        // Describes with revisioned properties will be visible in an export.
+        // The list must have exactly the same length as the 'exports' list.
+        // For example the 'animations' propery described below will only be
+        // available through the QtQuick/Animation 1.0 export.
+        exportMetaObjectRevisions: [0, 1]
+
         Property {
             name: "animations";
             type: "QDeclarativeAbstractAnimation"
@@ -454,7 +461,7 @@ Module {
             isPointer: true
             // defaults to false: whether the type actually is a QDeclarativeListProperty<type>
             isList: true
-            // defaults to 0: the minor version that introduced this property
+            // defaults to 0: the meta object revision that introduced this property
             revision: 1
         }
         Property { name: "loops"; type: "int" }

tools/qmlplugindump/main.cpp

@@ -256,30 +256,43 @@ public:
 
         QSet<const QDeclarativeType *> qmlTypes = qmlTypesByCppName.value(meta->className());
         if (!qmlTypes.isEmpty()) {
-            QStringList exports;
+            QHash<QString, const QDeclarativeType *> exports;
 
             foreach (const QDeclarativeType *qmlTy, qmlTypes) {
                 QString qmlTyName = qmlTy->qmlTypeName();
-                // some qmltype names are missing the actual names, ignore that import
-                if (qmlTyName.endsWith('/'))
-                    continue;
                 if (qmlTyName.startsWith(relocatableModuleUri + QLatin1Char('/'))) {
                     qmlTyName.remove(0, relocatableModuleUri.size() + 1);
                 }
                 if (qmlTyName.startsWith("./")) {
                     qmlTyName.remove(0, 2);
                 }
-                exports += enquote(QString("%1 %2.%3").arg(
+                if (qmlTyName.startsWith("/")) {
+                    qmlTyName.remove(0, 1);
+                }
+                const QString exportString = enquote(
+                            QString("%1 %2.%3").arg(
                                 qmlTyName,
                                 QString::number(qmlTy->majorVersion()),
                                 QString::number(qmlTy->minorVersion())));
+                exports.insert(exportString, qmlTy);
             }
 
             // ensure exports are sorted and don't change order when the plugin is dumped again
-            exports.removeDuplicates();
+            QStringList exportStrings = exports.keys();
-            qSort(exports);
+            qSort(exportStrings);
+            qml->writeArrayBinding(QLatin1String("exports"), exportStrings);
 
-            qml->writeArrayBinding(QLatin1String("exports"), exports);
+            // write meta object revisions unless they're all zero
+            QStringList metaObjectRevisions;
+            bool shouldWriteMetaObjectRevisions = false;
+            foreach (const QString &exportString, exportStrings) {
+                int metaObjectRevision = exports[exportString]->metaObjectRevision();
+                if (metaObjectRevision != 0)
+                    shouldWriteMetaObjectRevisions = true;
+                metaObjectRevisions += QString::number(metaObjectRevision);
+            }
+            if (shouldWriteMetaObjectRevisions)
+                qml->writeArrayBinding(QLatin1String("exportMetaObjectRevisions"), metaObjectRevisions);
 
             if (const QMetaObject *attachedType = (*qmlTypes.begin())->attachedPropertiesType()) {
                 qml->writeScriptBinding(QLatin1String("attachedType"), enquote(

tools/qmlplugindump/qmlstreamwriter.cpp

@@ -110,6 +110,22 @@ void QmlStreamWriter::writeArrayBinding(const QString &name, const QStringList &
 {
     flushPotentialLinesWithNewlines();
     writeIndent();
+
+    // try to use a single line
+    QString singleLine;
+    singleLine += QString("%1: [").arg(name);
+    for (int i = 0; i < elements.size(); ++i) {
+        singleLine += elements.at(i);
+        if (i != elements.size() - 1)
+            singleLine += QLatin1String(", ");
+    }
+    singleLine += QLatin1String("]\n");
+    if (singleLine.size() + m_indentDepth * 4 < 80) {
+        m_stream->write(singleLine.toUtf8());
+        return;
+    }
+
+    // write multi-line
     m_stream->write(QString("%1: [\n").arg(name).toUtf8());
     ++m_indentDepth;
     for (int i = 0; i < elements.size(); ++i) {