Undo: implement undo of tag editing

The code follows the other edit-commands, but uses its own base
class, because it is distinctly different. Editing the tag field
does not simply mean setting the tag for all dives, but rather
adding and removing individual tags.

This class will be reused for editing of dive buddies and masters.

Modify the tag widget thus that it sends an editingFinished()
signal when it goes out of focus. The editingFinished() signal
was prevented by hooking into the return, enter and tab key-events.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

1 files changed, 37 insertions, 0 deletions

diff --git a/desktop-widgets/command_edit.h b/desktop-widgets/command_edit.h
index 4eb1da848..fab951799 100644
--- a/desktop-widgets/command_edit.h
+++ b/desktop-widgets/command_edit.h
@@ -136,6 +136,43 @@ public:
 	DiveField fieldId() const override;
 };
 
+// Fields that work with tag-lists (tags, buddies, divemasters) work differently and therefore
+// have their own base class. In this case, it's not a template, as all these lists are base
+// on strings.
+class EditTagsBase : public Base {
+	bool workToBeDone() override;
+
+	// Dives to be edited. For historical reasons, the *last* entry was
+	// the active dive when the user initialized the action. This dive
+	// will be made the current dive on redo / undo.
+	std::vector<dive *> dives;
+	QStringList newList;	// Temporary until initialized
+	struct dive *oldDive;	// Temporary until initialized
+public:
+	EditTagsBase(const QVector<dive *> &dives, const QStringList &newList, struct dive *d);
+
+protected:
+	QStringList tagsToAdd;
+	QStringList tagsToRemove;
+	void undo() override;
+	void redo() override;
+
+	// Getters, setters and parsers to be overriden by sub-classes.
+	virtual QStringList data(struct dive *d) const = 0;
+	virtual void set(struct dive *d, const QStringList &v) const = 0;
+	virtual QString fieldName() const = 0;	// Name of the field, used to create the undo menu-entry
+	virtual DiveField fieldId() const = 0;
+};
+
+class EditTags : public EditTagsBase {
+public:
+	using EditTagsBase::EditTagsBase;	// Use constructor of base class.
+	QStringList data(struct dive *d) const override;
+	void set(struct dive *d, const QStringList &v) const override;
+	QString fieldName() const override;
+	DiveField fieldId() const override;
+};
+
 } // namespace Command
 
 #endif