Avoid a complete Toc reset in case when only a toc item update is needed.

* Buffer: new updateTocItem() signal (with Delegates and GuiView associates).
* TocBackend: take care of the signal emission instead of the Cursor::checkBufferStructure()
* TocModel: new updateTocItem() method.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@26636 a592a061-630c-0410-9148-cb99ea01b6c8

src/Buffer.cpp

@@ -2158,6 +2158,14 @@ ErrorList & Buffer::errorList(string const & type) const
 }
 
 
+void Buffer::updateTocItem(std::string const & type,
+	DocIterator const & dit) const
+{
+	if (gui_)
+		gui_->updateTocItem(type, dit);
+}
+
+
 void Buffer::structureChanged() const
 {
 	if (gui_)

src/Buffer.h

@@ -420,6 +420,8 @@ public:
 
 	/// This function is called when the buffer is changed.
 	void changed() const;
+	///
+	void updateTocItem(std::string const &, DocIterator const &) const;
 	/// This function is called when the buffer structure is changed.
 	void structureChanged() const;
 	/// This function is called when some parsing error shows up.

src/Cursor.cpp

@@ -2193,8 +2193,7 @@ void Cursor::recordUndoSelection() const
 void Cursor::checkBufferStructure()
 {
 	Buffer const * master = buffer().masterBuffer();
-	if (master->tocBackend().updateItem(*this))
-		master->structureChanged();
+	master->tocBackend().updateItem(*this);
 }
 
 

src/TocBackend.cpp

@@ -106,6 +106,8 @@ Toc & TocBackend::toc(string const & type)
 
 bool TocBackend::updateItem(DocIterator const & dit)
 {
+//	Inset * inset = dit.paragraph().inInset();
+//	inset->addToToc(dit);
 	if (dit.paragraph().layout().toclevel == Layout::NOT_IN_TOC)
 		return false;
 
@@ -149,6 +151,7 @@ bool TocBackend::updateItem(DocIterator const & dit)
 
 	const_cast<TocItem &>(*toc_item).str_ = tocstring;
 
+	buffer_->updateTocItem("tableofcontents", dit);
 	return true;
 }
 

src/frontends/Delegates.h

@@ -17,6 +17,7 @@
 namespace lyx {
 
 class Buffer;
+class DocIterator;
 class Inset;
 
 namespace frontend {
@@ -61,6 +62,8 @@ public:
 	virtual ~GuiBufferDelegate() {}
 	/// This function is called when the buffer structure is changed.
 	virtual void structureChanged() = 0;
+	/// This function is called when the buffer structure has been updated.
+	virtual void updateTocItem(std::string const &, DocIterator const &) = 0;
 	/// This function is called when some parsing error shows up.
 	virtual void errors(std::string const &) = 0;
 	/// This function is called when some message shows up.

src/frontends/qt4/GuiView.cpp

@@ -1042,6 +1042,12 @@ void GuiView::errors(string const & error_type)
 }
 
 
+void GuiView::updateTocItem(std::string const & type, DocIterator const & dit)
+{
+	d.toc_models_.updateItem(toqstr(type), dit);
+}
+
+
 void GuiView::structureChanged()
 {
 	d.toc_models_.reset(view());

src/frontends/qt4/GuiView.h

@@ -106,6 +106,7 @@ public:
 	void resetAutosaveTimers();
 	void errors(std::string const &);
 	void structureChanged();
+	void updateTocItem(std::string const &, DocIterator const &);
 	///@}
 
 	///

src/frontends/qt4/TocModel.cpp

@@ -130,6 +130,14 @@ void TocModel::reset()
 }
 
 
+void TocModel::updateItem(DocIterator const & dit)
+{
+	QModelIndex index = modelIndex(dit);
+	TocItem const & toc_item = tocItem(index);
+	model_->setData(index, toqstr(toc_item.str()), Qt::DisplayRole);
+}
+
+
 void TocModel::reset(Toc const & toc)
 {
 	toc_ = &toc;
@@ -298,6 +306,12 @@ void TocModels::updateBackend() const
 }
 
 
+void TocModels::updateItem(QString const & type, DocIterator const & dit)
+{
+	models_[type]->updateItem(dit);
+}
+
+
 void TocModels::reset(BufferView const * bv)
 {
 	bv_ = bv;

src/frontends/qt4/TocModel.h

@@ -53,6 +53,8 @@ public:
 	///
 	void reset();
 	///
+	void updateItem(DocIterator const & dit);
+	///
 	void clear();
 	///
 	QAbstractItemModel * model();
@@ -111,6 +113,8 @@ public:
 	///
 	void updateBackend() const;
 	///
+	void updateItem(QString const & type, DocIterator const & dit);
+	///
 	void sort(QString const & type, bool sort_it);
 	///
 	bool isSorted(QString const & type) const;