AutoNum: a lot of changes

Schemas now get saved with a UUID and do not have to be looked up according to the form. They can be renamed and it gets reflected in existing elements. The GUI for
editing them is now much easier, e.g. forms can be reshuffled. A formula can be applied. Many options now also for conductors and sheets.

sources/diagramcommands.cpp

@@ -17,8 +17,10 @@
 */
 #include "diagramcommands.h"
 
+#include "autoNum/elementautonumschemecommand.h"
 #include "diagram.h"
 #include "itemgroups.h"
+#include "qetproject.h"
 #include "qetgraphicsitem/conductortextitem.h"
 #include "qetgraphicsitem/diagramimageitem.h"
 #include "qetgraphicsitem/dynamicelementtextitem.h"
@@ -29,6 +31,19 @@
 #include "qetinformation.h"
 #include "qgimanager.h"
 
+namespace {
+/// Is @p element among those the numberings in @p schemes are given to?
+bool pasted_schemes_has(const QMap<QString, QVector<Element *>> &schemes, const Element *element)
+{
+	for (auto it = schemes.constBegin() ; it != schemes.constEnd() ; ++it) {
+		if (it.value().contains(const_cast<Element *>(element))) {
+			return true;
+		}
+	}
+	return false;
+}
+} // namespace
+
 /**
 	@brief PasteDiagramCommand::PasteDiagramCommand
 	Constructor
@@ -64,6 +79,10 @@ void PasteDiagramCommand::undo()
 {
 	diagram -> showMe();
 
+		//The numbering of the pasted elements, if any: gives the numbers
+		//back to the numberings they came from
+	QUndoCommand::undo();
+
 	foreach(QGraphicsItem *item, content.items(filter))
 		diagram->removeItem(item);
 }
@@ -98,6 +117,18 @@ void PasteDiagramCommand::redo()
 			e->initLink(elmts_list);
 		}
 
+		//The numberings the pasted elements follow, known now: the label
+		//erasing below empties their formula. Pasted elements get the next
+		//number of their numbering, as placed ones do, instead of the
+		//label of the element they were copied from.
+		const bool autonumber = m_autonumber && settings.value(
+					"diagramcommands/autonumber-pasted-elements", true).toBool();
+		QETProject *project = diagram->project();
+		QMap<QString, QVector<Element *>> pasted_schemes;
+		if (project && autonumber) {
+			pasted_schemes = ElementAutoNumSchemeCommand::pastedSchemes(project, elmts_list);
+		}
+
 		//make new uuid for every pasted conductor, because old uuid are
 		//the uuid of the copied conductor
 		const QList <Conductor *> all_pasted_conductors = content.conductors();
@@ -221,6 +252,44 @@ void PasteDiagramCommand::redo()
 			}
 		}
 
+			//What the pasted elements keep of their numbering names a
+			//numbering of this project, or none (a paste from another
+			//project, or from a file written before the ids)
+		if (project) {
+			ElementAutoNumSchemeCommand::linkPasted(project, elmts_list);
+			if (autonumber)
+			{
+					//A formula which names no numbering of this project is
+					//not kept: it would stand for a numbering which does
+					//not exist here, with a label which is not its result.
+					//The label is what the erase preference made of it.
+				for (Element *e : elmts_list)
+				{
+					const DiagramContext &info = e->elementInformations();
+					if (e->linkType() == Element::Slave || (e->linkType() & Element::AllReport)
+							|| info.value(QETInformation::ELMT_FORMULA).toString().isEmpty()
+							|| !project->elementAutoNumTitle(QUuid(info.value(QETInformation::ELMT_FORMULA_ID).toString())).isEmpty()
+							|| pasted_schemes_has(pasted_schemes, e)) {
+						continue;
+					}
+					DiagramContext dc = info;
+					dc.addValue(QETInformation::ELMT_FORMULA, QString());
+					for (DynamicElementTextItem *deti : e->dynamicTextItems())
+						deti->m_block_alignment = true;
+					for (auto *group : e->textGroups())
+						group->blockAlignmentUpdate(true);
+					e->setElementInformations(dc);
+					for (DynamicElementTextItem *deti : e->dynamicTextItems())
+						deti->m_block_alignment = false;
+					for (auto *group : e->textGroups())
+						group->blockAlignmentUpdate(false);
+				}
+			}
+			if (!pasted_schemes.isEmpty()) {
+				ElementAutoNumSchemeCommand::numberPasted(project, pasted_schemes, this);
+			}
+		}
+
 			//Pasted groups become new groups: the members of one source
 			//group all get the same new uuid, never the source's, or the
 			//copy would join the original's group. After the elements got
@@ -250,6 +319,10 @@ void PasteDiagramCommand::redo()
 		}
 	}
 
+		//The numbering of the pasted elements, if any, on the first redo
+		//as well as on the next ones
+	QUndoCommand::redo();
+
 	const QList<QGraphicsItem *> qgis_list = content.items();
 	for (QGraphicsItem *qgi : qgis_list)
 		qgi -> setSelected(true);