various: implemented multiple project support

This required various changes to various parts of the infrastructure (mostly
using paths to finding the "root project" of any given object throughout).
Now theoretically infinite projects can be opened and accounted for at any
given time.

app/project/item/item.cpp

@@ -132,7 +132,7 @@ const Item *Item::root() const
 {
   const Item* item = this;
 
-  while (item->parent() != nullptr) {
+  while (item->parent()) {
     item = item->parent();
   }
 

app/project/project.cpp

@@ -30,7 +30,9 @@
 
 OLIVE_NAMESPACE_ENTER
 
-Project::Project()
+Project::Project() :
+  is_modified_(false),
+  autorecovery_saved_(true)
 {
   root_.set_project(this);
 }
@@ -156,4 +158,32 @@ QList<ItemPtr> Project::get_items_of_type(Item::Type type) const
   return root_.get_children_of_type(type, true);
 }
 
+bool Project::is_modified() const
+{
+  return is_modified_;
+}
+
+void Project::set_modified(bool e)
+{
+  is_modified_ = e;
+  autorecovery_saved_ = !e;
+
+  emit ModifiedChanged(is_modified_);
+}
+
+bool Project::has_autorecovery_been_saved() const
+{
+  return autorecovery_saved_;
+}
+
+void Project::set_autorecovery_saved(bool e)
+{
+  autorecovery_saved_ = e;
+}
+
+bool Project::is_new() const
+{
+  return !is_modified_ && filename_.isEmpty();
+}
+
 OLIVE_NAMESPACE_EXIT

app/project/project.h

@@ -68,9 +68,19 @@ public:
 
   QList<ItemPtr> get_items_of_type(Item::Type type) const;
 
+  bool is_modified() const;
+  void set_modified(bool e);
+
+  bool has_autorecovery_been_saved() const;
+  void set_autorecovery_saved(bool e);
+
+  bool is_new() const;
+
 signals:
   void NameChanged();
 
+  void ModifiedChanged(bool e);
+
 private:
   Folder root_;
 
@@ -80,6 +90,10 @@ private:
 
   ColorManager color_manager_;
 
+  bool is_modified_;
+
+  bool autorecovery_saved_;
+
 };
 
 using ProjectPtr = std::shared_ptr<Project>;

app/project/projectsavemanager.cpp

@@ -55,6 +55,7 @@ void ProjectSaveManager::Action()
   }
 
   emit Succeeded();
+  emit ProjectSaveSucceeded(project_);
 }
 
 OLIVE_NAMESPACE_EXIT

app/project/projectsavemanager.h

@@ -32,6 +32,9 @@ class ProjectSaveManager : public Task
 public:
   ProjectSaveManager(Project* project);
 
+signals:
+  void ProjectSaveSucceeded(Project* p);
+
 protected:
   virtual void Action() override;
 

app/project/projectviewmodel.cpp

@@ -511,6 +511,11 @@ ProjectViewModel::MoveItemCommand::MoveItemCommand(ProjectViewModel *model,
   setText(tr("Move Item"));
 }
 
+Project *ProjectViewModel::MoveItemCommand::GetRelevantProject() const
+{
+  return model_->project();
+}
+
 void ProjectViewModel::MoveItemCommand::redo_internal()
 {
   model_->MoveItemInternal(item_, destination_);
@@ -532,6 +537,11 @@ ProjectViewModel::RenameItemCommand::RenameItemCommand(ProjectViewModel* model,
   setText(tr("Rename Item"));
 }
 
+Project *ProjectViewModel::RenameItemCommand::GetRelevantProject() const
+{
+  return model_->project();
+}
+
 void ProjectViewModel::RenameItemCommand::redo_internal()
 {
   model_->RenameChild(item_, new_name_);
@@ -551,6 +561,11 @@ ProjectViewModel::AddItemCommand::AddItemCommand(ProjectViewModel* model, Item*
 {
 }
 
+Project *ProjectViewModel::AddItemCommand::GetRelevantProject() const
+{
+  return model_->project();
+}
+
 void ProjectViewModel::AddItemCommand::redo_internal()
 {
   model_->AddChild(parent_, child_);
@@ -572,6 +587,11 @@ ProjectViewModel::RemoveItemCommand::RemoveItemCommand(ProjectViewModel *model,
 {
 }
 
+Project *ProjectViewModel::RemoveItemCommand::GetRelevantProject() const
+{
+  return model_->project();
+}
+
 void ProjectViewModel::RemoveItemCommand::redo_internal()
 {
   parent_ = item_->parent();

app/project/projectviewmodel.h

@@ -114,6 +114,8 @@ public:
   public:
     MoveItemCommand(ProjectViewModel* model, Item* item, Folder* destination, QUndoCommand* parent = nullptr);
 
+    virtual Project* GetRelevantProject() const override;
+
   protected:
     virtual void redo_internal() override;
 
@@ -134,6 +136,8 @@ public:
   public:
     RenameItemCommand(ProjectViewModel* model, Item* item, const QString& name, QUndoCommand* parent = nullptr);
 
+    virtual Project* GetRelevantProject() const override;
+
   protected:
     virtual void redo_internal() override;
 
@@ -153,6 +157,8 @@ public:
   public:
     AddItemCommand(ProjectViewModel* model, Item* folder, ItemPtr child, QUndoCommand* parent = nullptr);
 
+    virtual Project* GetRelevantProject() const override;
+
   protected:
     virtual void redo_internal() override;
 
@@ -172,6 +178,8 @@ public:
   public:
     RemoveItemCommand(ProjectViewModel* model, ItemPtr item, QUndoCommand* parent = nullptr);
 
+    virtual Project* GetRelevantProject() const override;
+
   protected:
     virtual void redo_internal() override;