Debugger: Remove unused WatchItem::state flag

Lately it was only set and read for debugging purposes. A mechanism
similar to the ChildrenNeeded state is still needed and available
through WatchItem::wantsChildren.

Change-Id: I78c85d65bc35810be420bd0418db9675473697cd
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

src/plugins/debugger/qml/qmlinspectoragent.cpp

@@ -615,7 +615,6 @@ void QmlInspectorAgent::addWatchData(const ObjectReference &obj,
         objWatch->type = obj.className();
         objWatch->value = "object";
         objWatch->wantsChildren = true;
-        objWatch->setAllUnneeded();
 
         m_qmlEngine->watchHandler()->insertItem(objWatch);
         addObjectWatch(objWatch->id);
@@ -645,7 +644,6 @@ void QmlInspectorAgent::addWatchData(const ObjectReference &obj,
         propertiesWatch->id = objDebugId;
         propertiesWatch->value = "list";
         propertiesWatch->wantsChildren = true;
-        propertiesWatch->setAllUnneeded();
 
         foreach (const PropertyReference &property, obj.properties()) {
             const QString propertyName = property.name();
@@ -659,7 +657,6 @@ void QmlInspectorAgent::addWatchData(const ObjectReference &obj,
             propertyWatch->type = property.valueTypeName();
             propertyWatch->value = property.value().toString();
             propertyWatch->wantsChildren = false;
-            propertyWatch->setAllUnneeded();
             propertiesWatch->appendChild(propertyWatch);
         }
 

src/plugins/debugger/watchdata.cpp

@@ -109,7 +109,6 @@ bool isIntOrFloatType(const QString &type)
 
 WatchItem::WatchItem() :
     id(WatchItem::InvalidId),
-    state(InitialState),
     address(0),
     origaddr(0),
     size(0),
@@ -135,7 +134,6 @@ bool WatchItem::isVTablePointer() const
 
 void WatchItem::setError(const QString &msg)
 {
-    setAllUnneeded();
     value = msg;
     wantsChildren = false;
     valueEnabled = false;
@@ -178,8 +176,6 @@ void WatchItem::setValue(const QString &value0)
     // column. No need to duplicate it here.
     if (value.startsWith('(' + type + ") 0x"))
         value = value.section(QLatin1Char(' '), -1, -1);
-
-    setValueUnneeded();
 }
 
 enum GuessChildrenResult { HasChildren, HasNoChildren, HasPossiblyChildren };
@@ -257,8 +253,6 @@ QString WatchItem::toString() const
     if (!exp.isEmpty())
         str << "exp=\"" << exp << doubleQuoteComma;
 
-    if (isValueNeeded())
-        str << "value=<needed>,";
     if (!value.isEmpty())
         str << "value=\"" << value << doubleQuoteComma;
 
@@ -272,8 +266,6 @@ QString WatchItem::toString() const
 
     str << "wantsChildren=\"" << (wantsChildren ? "true" : "false") << doubleQuoteComma;
 
-    if (isChildrenNeeded())
-        str << "children=<needed>,";
     str.flush();
     if (res.endsWith(QLatin1Char(',')))
         res.truncate(res.size() - 1);
@@ -340,7 +332,6 @@ public:
             child->type = childType;
             child->address = addrbase + i * addrstep;
             child->valueEditable = true;
-            child->setAllUnneeded();
             item->appendChild(child);
         }
     }
@@ -404,8 +395,6 @@ static bool sortByName(const WatchItem *a, const WatchItem *b)
 
 void WatchItem::parseHelper(const GdbMi &input, bool maySort)
 {
-    setChildrenUnneeded();
-
     GdbMi mi = input["type"];
     if (mi.isValid())
         setType(mi.data());
@@ -445,11 +434,8 @@ void WatchItem::parseHelper(const GdbMi &input, bool maySort)
 
     mi = input["value"];
     QString enc = input["valueencoded"].data();
-    if (mi.isValid() || !enc.isEmpty()) {
+    if (mi.isValid() || !enc.isEmpty())
         setValue(decodeData(mi.data(), enc));
-    } else {
-        setValueNeeded();
-    }
 
     mi = input["size"];
     if (mi.isValid())

src/plugins/debugger/watchdata.h

@@ -60,26 +60,9 @@ public:
 
     WatchItem *parentItem() const;
 
-    enum State
-    {
-        ValueNeeded       = 2,
-        ChildrenNeeded    = 8,
-
-        InitialState = ValueNeeded | ChildrenNeeded
-    };
-
     static const qint64 InvalidId = -1;
 
-    void setAllUnneeded()          { state = State(0); }
-
-    bool isValueNeeded() const { return state & ValueNeeded; }
-    void setValueNeeded()      { state = State(state | ValueNeeded); }
-    void setValueUnneeded()    { state = State(state & ~ValueNeeded); }
-
-    bool isChildrenNeeded() const { return state & ChildrenNeeded; }
-    void setChildrenNeeded()   { state = State(state | ChildrenNeeded); }
-    void setChildrenUnneeded() { state = State(state & ~ChildrenNeeded); }
-    void setHasChildren(bool c)   { wantsChildren = c;  if (!c) setChildrenUnneeded(); }
+    void setHasChildren(bool c)   { wantsChildren = c; }
 
     bool isValid()   const { return !iname.isEmpty(); }
     bool isVTablePointer() const;
@@ -99,7 +82,6 @@ public:
 
 public:
     qint64          id;            // Token for the engine for internal mapping
-    qint32          state;         // 'needed' flags;
     QString         iname;         // Internal name sth like 'local.baz.public.a'
     QString         exp;           // The expression
     QString         name;          // Displayed name

src/plugins/debugger/watchhandler.cpp

@@ -1220,11 +1220,9 @@ void WatchModel::fetchMore(const QModelIndex &idx)
     WatchItem *item = nonRootItemForIndex(idx);
     if (item) {
         m_expandedINames.insert(item->iname);
-        if (item->children().isEmpty()) {
-            item->setChildrenNeeded();
+        if (item->children().isEmpty())
             m_engine->expandItem(item->iname);
     }
-    }
 }
 
 bool WatchModel::hasChildren(const QModelIndex &idx) const
@@ -2088,7 +2086,6 @@ void WatchHandler::watchExpression(const QString &exp, const QString &name)
     saveWatchers();
 
     if (m_model->m_engine->state() == DebuggerNotReady) {
-        item->setAllUnneeded();
         item->setValue(QString(QLatin1Char(' ')));
         item->update();
     } else {
@@ -2111,7 +2108,6 @@ void WatchHandler::updateWatchExpression(WatchItem *item, const QString &newExp)
 
     saveWatchers();
     if (m_model->m_engine->state() == DebuggerNotReady) {
-        item->setAllUnneeded();
         item->setValue(QString(QLatin1Char(' ')));
         item->update();
     } else {
@@ -2290,11 +2286,9 @@ void WatchHandler::fetchMore(const QString &iname) const
 {
     if (WatchItem *item = m_model->findItem(iname)) {
         m_model->m_expandedINames.insert(iname);
-        if (item->children().isEmpty()) {
-            item->setChildrenNeeded();
+        if (item->children().isEmpty())
             m_model->m_engine->expandItem(iname);
     }
-    }
 }
 
 WatchItem *WatchHandler::findItem(const QString &iname) const