Keep graph priority if the graph is empty (#734)

src/Cutter.cpp

@@ -1229,6 +1229,16 @@ QString CutterCore::getSimpleGraph(QString function)
     return dot;
 }
 
+void CutterCore::setGraphEmpty(bool empty)
+{
+    emptyGraph = empty;
+}
+
+bool CutterCore::isGraphEmpty()
+{
+    return emptyGraph;
+}
+
 void CutterCore::getOpcodes()
 {
     QString opcodes = cmd("?O");

src/Cutter.h

@@ -538,6 +538,8 @@ public:
     QJsonDocument getFileVersionInfo();
     QStringList getStats();
     QString getSimpleGraph(QString function);
+    void setGraphEmpty(bool empty);
+    bool isGraphEmpty();
 
     void getOpcodes();
     QList<QString> opcodes;
@@ -661,6 +663,8 @@ private:
     RVA offsetPriorDebugging = RVA_INVALID;
     QErrorMessage msgBox;
 
+    bool emptyGraph = false;
+
     QList<CutterPlugin*> plugins;
 };
 

src/widgets/CutterSeekableWidget.cpp

@@ -19,8 +19,7 @@ void CutterSeekableWidget::seek(RVA addr)
 {
     if (isInSyncWithCore) {
         Core()->seek(addr);
-    }
+    } else {
-    else {
         prevIdenpendentOffset = independentOffset;
         independentOffset = addr;
         emit seekChanged(addr);
@@ -32,8 +31,7 @@ RVA CutterSeekableWidget::getOffset()
     RVA addr;
     if (isInSyncWithCore) {
         addr = Core()->getOffset();
-    }
+    } else {
-    else {
         addr = independentOffset;
     }
     return addr;

src/widgets/DisassemblerGraphView.cpp

@@ -168,10 +168,7 @@ void DisassemblerGraphView::loadCurrentGraph()
 
     bool emptyGraph = functions.isEmpty();
     if (emptyGraph) {
-        // If there's no function to print, just move to disassembly and add a message
+        // If there's no function to print, just add a message
-        if (Core()->getMemoryWidgetPriority() == CutterCore::MemoryWidgetType::Graph) {
-            Core()->setMemoryWidgetPriority(CutterCore::MemoryWidgetType::Disassembly);
-        }
         if (!emptyText) {
             QVBoxLayout *layout = new QVBoxLayout(this);
             emptyText = new QLabel(this);
@@ -184,6 +181,8 @@ void DisassemblerGraphView::loadCurrentGraph()
     } else if (emptyText) {
         emptyText->setVisible(false);
     }
+    // Refresh global "empty graph" variable so other widget know there is nothing to show here
+    Core()->setGraphEmpty(emptyGraph);
 
     Analysis anal;
     anal.ready = true;
@@ -707,7 +706,7 @@ void DisassemblerGraphView::seekInstruction(bool previous_instr)
             continue;
         }
 
-        // Found the instructon. Check if a next one exists
+        // Found the instruction. Check if a next one exists
         if (!previous_instr && (i < db->instrs.size() - 1)) {
             seekable->seek(db->instrs[i + 1].addr);
         } else if (previous_instr && (i > 0)) {

src/widgets/DisassemblerGraphView.h

@@ -108,7 +108,7 @@ class DisassemblerGraphView : public GraphView
 
 public:
     DisassemblerGraphView(QWidget *parent);
-    ~DisassemblerGraphView();
+    ~DisassemblerGraphView() override;
     std::unordered_map<ut64, DisassemblyBlock> disassembly_blocks;
     virtual void drawBlock(QPainter &p, GraphView::GraphBlock &block) override;
     virtual void blockClicked(GraphView::GraphBlock &block, QMouseEvent *event, QPoint pos) override;
@@ -122,7 +122,7 @@ public:
 
     void loadCurrentGraph();
     QString windowTitle;
-//    bool navigate(ut64 addr);
+    bool isGraphEmpty();
 
 public slots:
     void refreshView();
@@ -160,6 +160,7 @@ private:
     int charHeight;
     int charOffset;
     int baseline;
+    bool emptyGraph;
 
     DisassemblyContextMenu *mMenu;
 

src/widgets/DisassemblyWidget.cpp

@@ -125,7 +125,8 @@ DisassemblyWidget::DisassemblyWidget(MainWindow *main, QAction *action)
     connect(Config(), SIGNAL(colorsUpdated()), this, SLOT(colorsUpdatedSlot()));
 
     connect(this, &QDockWidget::visibilityChanged, this, [](bool visibility) {
-        if (visibility) {
+        bool emptyGraph = (Core()->getMemoryWidgetPriority() == CutterCore::MemoryWidgetType::Graph && Core()->isGraphEmpty());
+        if (visibility && !emptyGraph) {
             Core()->setMemoryWidgetPriority(CutterCore::MemoryWidgetType::Disassembly);
         }
     });
@@ -623,7 +624,8 @@ void DisassemblyWidget::on_seekChanged(RVA offset)
 
 void DisassemblyWidget::raisePrioritizedMemoryWidget(CutterCore::MemoryWidgetType type)
 {
-    if (type == CutterCore::MemoryWidgetType::Disassembly) {
+    bool emptyGraph = (type == CutterCore::MemoryWidgetType::Graph && Core()->isGraphEmpty());
+    if (type == CutterCore::MemoryWidgetType::Disassembly || emptyGraph) {
         raise();
         setFocus();
     }

src/widgets/GraphWidget.cpp

@@ -18,7 +18,8 @@ GraphWidget::GraphWidget(MainWindow *main, QAction *action) :
 
     connect(Core(), &CutterCore::raisePrioritizedMemoryWidget,
     this, [ = ](CutterCore::MemoryWidgetType type) {
-        if (type == CutterCore::MemoryWidgetType::Graph) {
+        bool emptyGraph = (type == CutterCore::MemoryWidgetType::Graph && Core()->isGraphEmpty());
+        if (type == CutterCore::MemoryWidgetType::Graph && !emptyGraph) {
             this->raise();
             this->graphView->setFocus();
         }