Debugger: Allow changing item format for all array elements

Change-Id: I05000102d4c6b185340581029006b9254c91fcb1
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/debugger/watchhandler.cpp

@@ -397,6 +397,7 @@ public:
 class WatchModel : public WatchModelBase
 {
     Q_DECLARE_TR_FUNCTIONS(Debugger::Internal::WatchModel)
+    typedef QSet<WatchItem *> WatchItemSet;
 public:
     WatchModel(WatchHandler *handler, DebuggerEngine *engine);
 
@@ -446,9 +447,13 @@ public:
     void grabWidget();
     void ungrabWidget();
     void timerEvent(QTimerEvent *event) override;
-    int m_grabWidgetTimerId = -1;
+private:
+    QMenu *createFormatMenuForManySelected(const WatchItemSet &item, QWidget *parent);
+    void setItemsFormat(const WatchItemSet &items, const DisplayFormat &format);
+    void addCharsPrintableMenu(QMenu *menu);
 
 public:
+    int m_grabWidgetTimerId = -1;
     WatchHandler *m_handler; // Not owned.
     DebuggerEngine *m_engine; // Not owned.
 
@@ -1673,7 +1678,17 @@ bool WatchModel::contextMenuEvent(const ItemViewEvent &ev)
               [this] { grabWidget(); });
 
     menu->addSeparator();
+    QModelIndexList mil = ev.currentOrSelectedRows();
+    if (mil.size() > 1) {
+        WatchItemSet wis;
+        for (const QModelIndex &i : mil)
+            wis.insert(itemForIndex(i));
+
+        menu->addMenu(createFormatMenuForManySelected(wis, menu));
+    } else {
         menu->addMenu(createFormatMenu(item, menu));
+    }
+
     menu->addMenu(createMemoryMenu(item, menu));
     menu->addMenu(createBreakpointMenu(item, menu));
     menu->addSeparator();
@@ -1835,6 +1850,20 @@ QMenu *WatchModel::createMemoryMenu(WatchItem *item, QWidget *parent)
     return menu;
 }
 
+void WatchModel::addCharsPrintableMenu(QMenu *menu)
+{
+    auto addBaseChangeAction = [this, menu](const QString &text, int base) {
+        addCheckableAction(menu, text, true, theUnprintableBase == base, [this, base] {
+            theUnprintableBase = base;
+            emit layoutChanged(); // FIXME
+        });
+    };
+    addBaseChangeAction(tr("Treat All Characters as Printable"), 0);
+    addBaseChangeAction(tr("Show Unprintable Characters as Escape Sequences"), -1);
+    addBaseChangeAction(tr("Show Unprintable Characters as Octal"), 8);
+    addBaseChangeAction(tr("Show Unprintable Characters as Hexadecimal"), 16);
+}
+
 QMenu *WatchModel::createFormatMenu(WatchItem *item, QWidget *parent)
 {
     auto menu = new QMenu(tr("Change Value Display Format"), parent);
@@ -1849,17 +1878,7 @@ QMenu *WatchModel::createFormatMenu(WatchItem *item, QWidget *parent)
     const int typeFormat = theTypeFormats.value(stripForFormat(item->type), AutomaticFormat);
     const int individualFormat = theIndividualFormats.value(iname, AutomaticFormat);
 
-    auto addBaseChangeAction = [this, menu](const QString &text, int base) {
-        addCheckableAction(menu, text, true, theUnprintableBase == base, [this, base] {
-            theUnprintableBase = base;
-            emit layoutChanged(); // FIXME
-        });
-    };
-
-    addBaseChangeAction(tr("Treat All Characters as Printable"), 0);
-    addBaseChangeAction(tr("Show Unprintable Characters as Escape Sequences"), -1);
-    addBaseChangeAction(tr("Show Unprintable Characters as Octal"), 8);
-    addBaseChangeAction(tr("Show Unprintable Characters as Hexadecimal"), 16);
+    addCharsPrintableMenu(menu);
 
     const QString spacer = "     ";
     menu->addSeparator();
@@ -1911,6 +1930,67 @@ QMenu *WatchModel::createFormatMenu(WatchItem *item, QWidget *parent)
     return menu;
 }
 
+void WatchModel::setItemsFormat(const WatchItemSet &items, const DisplayFormat &format)
+{
+    if (format == AutomaticFormat) {
+        for (WatchItem *item : items)
+            theIndividualFormats.remove(item->iname);
+    } else {
+        for (WatchItem *item : items)
+            theIndividualFormats[item->iname] = format;
+    }
+    saveFormats();
+}
+
+QMenu *WatchModel::createFormatMenuForManySelected(const WatchItemSet &items, QWidget *parent)
+{
+    auto menu = new QMenu(tr("Change Display Format for Selected Values"), parent);
+
+    addCharsPrintableMenu(menu);
+
+    QHash<DisplayFormat, int> allItemsFormats;
+    for (WatchItem *item : items) {
+        const DisplayFormats alternativeFormats = typeFormatList(item);
+        for (const DisplayFormat &format : alternativeFormats) {
+            QHash<DisplayFormat, int>::iterator itr = allItemsFormats.find(format);
+            if (itr != allItemsFormats.end())
+                itr.value() += 1;
+            else
+                allItemsFormats[format] = 1;
+        }
+    }
+
+    const QString spacer = "     ";
+    menu->addSeparator();
+
+    addAction(menu, tr("Change Display for Objects"), false);
+    QString msg = QString(tr("Use Display Format Based on Type"));
+    addCheckableAction(menu, spacer + msg, true, false,
+                       [this, items] {
+                            setItemsFormat(items, AutomaticFormat);
+                            m_engine->updateLocals();
+                       });
+
+    int countOfSelectItems = items.size();
+    QHashIterator<DisplayFormat, int> iter(allItemsFormats);
+    while (iter.hasNext()) {
+        iter.next();
+        DisplayFormat format = iter.key();
+        QString formatName = nameForFormat(format);
+        if (formatName.isEmpty())
+            continue;
+
+        addCheckableAction(menu, spacer + formatName,
+                           iter.value() == countOfSelectItems,
+                           false,
+                           [this, format, items] {
+                                setItemsFormat(items, format);
+                                m_engine->updateLocals();
+                           });
+    }
+    return menu;
+}
+
 static inline QString msgArrayFormat(int n)
 {
     return WatchModel::tr("Array of %n items", nullptr, n);