Qt: Fix proto tree links and related frames.

Add FieldInformation::isLink and use it to style link items.

Add back a related frame information.

Get rid of rowsInserted() and just visit each tree node starting from
the root.

Change-Id: I0e7ef6b2e11d25465705adffbb77d6f6cfb2a435
Reviewed-on: https://code.wireshark.org/review/25342
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Gerald Combs <gerald@wireshark.org>

ui/qt/models/proto_tree_model.cpp

@@ -67,6 +67,12 @@ int ProtoTreeModel::rowCount(const QModelIndex &parent) const
     return ProtoNode(root_node_).childrenCount();
 }
 
+// The QItemDelegate documentation says
+// "When displaying items from a custom model in a standard view, it is
+//  often sufficient to simply ensure that the model returns appropriate
+//  data for each of the roles that determine the appearance of items in
+//  views."
+// We might want to move this to a delegate regardless.
 QVariant ProtoTreeModel::data(const QModelIndex &index, int role) const
 {
     ProtoNode index_node = protoNodeFromIndex(index);
@@ -106,11 +112,20 @@ QVariant ProtoTreeModel::data(const QModelIndex &index, int role) const
         if(finfo.flag(PI_SEVERITY_MASK)) {
             return ColorUtils::expert_color_foreground;
         }
+        if (finfo.isLink()) {
+            return QApplication::palette().link();
+        }
         if(finfo.headerInfo().type == FT_PROTOCOL) {
             return QApplication::palette().windowText();
         }
         return QApplication::palette().text();
     }
+    case Qt::FontRole:
+        if (finfo.isLink()) {
+            QFont font;
+            font.setUnderline(true);
+            return font;
+        }
     default:
         break;
     }

ui/qt/proto_tree.cpp

@@ -234,10 +234,42 @@ void ProtoTree::setMonospaceFont(const QFont &mono_font)
     update();
 }
 
+void ProtoTree::foreachTreeNode(proto_node *node, gpointer proto_tree_ptr)
+{
+    ProtoTree *tree_view = static_cast<ProtoTree *>(proto_tree_ptr);
+    ProtoTreeModel *model = qobject_cast<ProtoTreeModel *>(tree_view->model());
+    if (!tree_view || !model) {
+        return;
+    }
+
+    // Expanded state
+    if (tree_expanded(node->finfo->tree_type)) {
+        ProtoNode expand_node = ProtoNode(node);
+        tree_view->expand(model->indexFromProtoNode(expand_node));
+    }
+
+    // Related frames
+    if (node->finfo->hfinfo->type == FT_FRAMENUM) {
+        ft_framenum_type_t framenum_type = (ft_framenum_type_t)GPOINTER_TO_INT(node->finfo->hfinfo->strings);
+        tree_view->emitRelatedFrame(node->finfo->value.value.uinteger, framenum_type);
+    }
+
+    proto_tree_children_foreach(node, foreachTreeNode, proto_tree_ptr);
+}
+
+// We track item expansion using proto.c:tree_is_expanded. QTreeView
+// tracks it using QTreeViewPrivate::expandedIndexes. When we're handed
+// a new tree, clear expandedIndexes and repopulate it by walking the
+// tree and calling QTreeView::expand above.
 void ProtoTree::setRootNode(proto_node *root_node) {
     setFont(mono_font_);
     reset(); // clears expandedIndexes.
     proto_tree_model_->setRootNode(root_node);
+
+    disconnect(this, SIGNAL(expanded(QModelIndex)), this, SLOT(syncExpanded(QModelIndex)));
+    proto_tree_children_foreach(root_node, foreachTreeNode, this);
+    connect(this, SIGNAL(expanded(QModelIndex)), this, SLOT(syncExpanded(QModelIndex)));
+
     updateContentWidth();
 }
 
@@ -567,42 +599,6 @@ bool ProtoTree::eventFilter(QObject * obj, QEvent * event)
     return QTreeView::eventFilter(obj, event);
 }
 
-void ProtoTree::foreachSyncExpansion(proto_node *node, gpointer proto_tree_ptr)
-{
-    if (tree_expanded(node->finfo->tree_type)) {
-        QTreeView *tree_view = static_cast<QTreeView *>(proto_tree_ptr);
-        ProtoTreeModel *model = qobject_cast<ProtoTreeModel *>(tree_view->model());
-        if (!tree_view || !model) {
-            return;
-        }
-
-        ProtoNode expand_node = ProtoNode(node);
-        tree_view->expand(model->indexFromProtoNode(expand_node));
-    }
-
-    proto_tree_children_foreach(node, foreachSyncExpansion, proto_tree_ptr);
-}
-
-// We track item expansion using proto.c:tree_is_expanded. QTreeView
-// tracks it using QTreeViewPrivate::expandedIndexes. When we're handed
-// a new tree, clear expandedIndexes (which we do above in setRootNode)
-// and repopulate it by walking the tree and calling
-// QTreeView::expand.
-void ProtoTree::rowsInserted(const QModelIndex &parent, int start, int end)
-{
-    disconnect(this, SIGNAL(expanded(QModelIndex)), this, SLOT(syncExpanded(QModelIndex)));
-    for (int row = start; row <= end; row++) {
-        QModelIndex index = proto_tree_model_->index(row, 0, parent);
-        ProtoNode row_node = proto_tree_model_->protoNodeFromIndex(index);
-        if (row_node.isExpanded()) {
-            expand(index);
-        }
-        proto_tree_children_foreach(row_node.protoNode(), foreachSyncExpansion, this);
-    }
-    connect(this, SIGNAL(expanded(QModelIndex)), this, SLOT(syncExpanded(QModelIndex)));
-    QTreeView::rowsInserted(parent, start, end);
-}
-
 /*
  * Editor modelines
  *

ui/qt/proto_tree.h

@@ -45,7 +45,6 @@ protected:
     virtual void timerEvent(QTimerEvent *event);
     virtual void keyReleaseEvent(QKeyEvent *event);
     virtual bool eventFilter(QObject * obj, QEvent * ev);
-    virtual void rowsInserted(const QModelIndex & parent, int start, int end);
 
 private:
     ProtoTreeModel *proto_tree_model_;
@@ -64,7 +63,7 @@ private:
     capture_file *cap_file_;
 
     void saveSelectedField(QModelIndex &index);
-    static void foreachSyncExpansion(proto_node *node, gpointer proto_tree_ptr);
+    static void foreachTreeNode(proto_node *node, gpointer proto_tree_ptr);
 
 signals:
     void fieldSelected(FieldInformation *);

ui/qt/utils/field_information.cpp

@@ -28,7 +28,7 @@ FieldInformation::FieldInformation(proto_node *node, QObject * parent)
     parent_fi_ = NULL;
 }
 
-bool FieldInformation::isValid()
+bool FieldInformation::isValid() const
 {
     bool ret = false;
 
@@ -44,6 +44,17 @@ bool FieldInformation::isValid()
     return ret;
 }
 
+bool FieldInformation::isLink() const
+{
+    if (fi_ && fi_->hfinfo) {
+        if((fi_->hfinfo->type == FT_FRAMENUM) ||
+                (FI_GET_FLAG(fi_, FI_URL) && IS_FT_STRING(fi_->hfinfo->type))) {
+            return true;
+        }
+    }
+    return false;
+}
+
 void FieldInformation::setParentField(field_info * par_fi)
 {
     parent_fi_ = par_fi;

ui/qt/utils/field_information.h

@@ -45,7 +45,8 @@ public:
     explicit FieldInformation(field_info * fi, QObject * parent = Q_NULLPTR);
     explicit FieldInformation(proto_node * node, QObject * parent = Q_NULLPTR);
 
-    bool isValid();
+    bool isValid() const;
+    bool isLink() const ;
 
     field_info * fieldInfo() const;