ProjectExplorer: De-duplicate code in IBuildStepFactory derived classes

This removes 900 lines of duplicated code, some duplicated checks at
runtime and some (minor) quadratic behavior when gathering display names.

canClone(), canRestore() and canCreate() and restore() use the same
pattern. Handle that on the core side once. Leave retore() virtual to let
the ios code unmodified (which is likely not needed, later...). Introduce
'Unclonable' and 'Uncreatable' flags to keep Android package installation
and WinRT deployment (non-)functionality unchanged.

Change-Id: I0325479aff818a4038b2f241ca733b8d8cd66f2f
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

1 files changed, 8 insertions, 44 deletions

diff --git a/src/plugins/genericprojectmanager/genericmakestep.cpp b/src/plugins/genericprojectmanager/genericmakestep.cpp
index f696359bf0..0e581fa155 100644
--- a/src/plugins/genericprojectmanager/genericmakestep.cpp
+++ b/src/plugins/genericprojectmanager/genericmakestep.cpp
@@ -320,17 +320,19 @@ GenericMakeStepFactory::GenericMakeStepFactory(QObject *parent) :
 {
 }
 
-bool GenericMakeStepFactory::canCreate(BuildStepList *parent, const Id id) const
+QList<BuildStepInfo> GenericMakeStepFactory::availableSteps(BuildStepList *parent) const
 {
-    if (parent->target()->project()->id() == Constants::GENERICPROJECT_ID)
-        return id == GENERIC_MS_ID;
-    return false;
+    if (parent->target()->project()->id() != Constants::GENERICPROJECT_ID)
+        return {};
+
+    return {{ GENERIC_MS_ID,
+              QCoreApplication::translate("GenericProjectManager::Internal::GenericMakeStep",
+              GENERIC_MS_DISPLAY_NAME) }};
 }
 
 BuildStep *GenericMakeStepFactory::create(BuildStepList *parent, const Id id)
 {
-    if (!canCreate(parent, id))
-        return 0;
+    Q_UNUSED(id)
     GenericMakeStep *step = new GenericMakeStep(parent);
     if (parent->id() == ProjectExplorer::Constants::BUILDSTEPS_CLEAN) {
         step->setClean(true);
@@ -341,50 +343,12 @@ BuildStep *GenericMakeStepFactory::create(BuildStepList *parent, const Id id)
     return step;
 }
 
-bool GenericMakeStepFactory::canClone(BuildStepList *parent, BuildStep *source) const
-{
-    return canCreate(parent, source->id());
-}
-
 BuildStep *GenericMakeStepFactory::clone(BuildStepList *parent, BuildStep *source)
 {
-    if (!canClone(parent, source))
-        return 0;
     GenericMakeStep *old(qobject_cast<GenericMakeStep *>(source));
     Q_ASSERT(old);
     return new GenericMakeStep(parent, old);
 }
 
-bool GenericMakeStepFactory::canRestore(BuildStepList *parent, const QVariantMap &map) const
-{
-    return canCreate(parent, idFromMap(map));
-}
-
-BuildStep *GenericMakeStepFactory::restore(BuildStepList *parent, const QVariantMap &map)
-{
-    if (!canRestore(parent, map))
-        return 0;
-    GenericMakeStep *bs(new GenericMakeStep(parent));
-    if (bs->fromMap(map))
-        return bs;
-    delete bs;
-    return 0;
-}
-
-QList<Id> GenericMakeStepFactory::availableCreationIds(BuildStepList *parent) const
-{
-    if (parent->target()->project()->id() == Constants::GENERICPROJECT_ID)
-        return QList<Id>() << Id(GENERIC_MS_ID);
-    return QList<Id>();
-}
-
-QString GenericMakeStepFactory::displayNameForId(const Id id) const
-{
-    if (id == GENERIC_MS_ID)
-        return QCoreApplication::translate("GenericProjectManager::Internal::GenericMakeStep",
-                                           GENERIC_MS_DISPLAY_NAME);
-    return QString();
-}
-
 } // namespace Internal
 } // namespace GenericProjectManager