Add completions to the dive location, buddy and divemaster entries

This way you can just type the first few characters of a location you've
been to before, and it will show you a list of possible completions.
Same for buddies and divemasters (which take the completions from a list
of people you've used before).

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

dive.c

@@ -240,6 +240,9 @@ struct dive *fixup_dive(struct dive *dive)
 	update_temperature(&dive->watertemp, mintemp);
 	update_depth(&dive->maxdepth, maxdepth);
 
+	add_people(dive->buddy);
+	add_people(dive->divemaster);
+	add_location(dive->location);
 	for (i = 0; i < MAX_CYLINDERS; i++) {
 		cylinder_type_t *type = &dive->cylinder[i].type;
 		add_cylinder_description(type);

dive.h

@@ -260,6 +260,9 @@ extern void run_ui(void);
 extern void report_error(GError* error);
 
 extern void add_cylinder_description(cylinder_type_t *);
+extern void add_people(const char *string);
+extern void add_location(const char *string);
+
 extern void dive_list_update_dives(void);
 extern void flush_divelist(struct dive *dive);
 

info.c

@@ -123,7 +123,7 @@ void show_dive_info(struct dive *dive)
 	gtk_text_buffer_set_text(notes, dive && dive->notes ? dive->notes : "", -1);
 }
 
-static GtkEntry *text_entry(GtkWidget *box, const char *label)
+static GtkEntry *text_entry(GtkWidget *box, const char *label, GtkListStore *completions)
 {
 	GtkWidget *entry;
 	GtkWidget *frame = gtk_frame_new(label);
@@ -133,6 +133,14 @@ static GtkEntry *text_entry(GtkWidget *box, const char *label)
 	entry = gtk_entry_new();
 	gtk_container_add(GTK_CONTAINER(frame), entry);
 
+	if (completions) {
+		GtkEntryCompletion *completion;
+		completion = gtk_entry_completion_new();
+		gtk_entry_completion_set_text_column(completion, 0);
+		gtk_entry_completion_set_model(completion, GTK_TREE_MODEL(completions));
+		gtk_entry_set_completion(GTK_ENTRY(entry), completion);
+	}
+
 	return GTK_ENTRY(entry);
 }
 
@@ -162,19 +170,70 @@ static GtkTextBuffer *text_view(GtkWidget *box, const char *label)
 	return buffer;
 }
 
+static int found_string_entry;
+
+static gboolean match_string_entry(GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data)
+{
+	const char *string = data;
+	char *entry;
+
+	gtk_tree_model_get(model, iter, 0, &entry, -1);
+	if (strcmp(entry, string))
+		return FALSE;
+	found_string_entry = 1;
+	return TRUE;
+}
+
+static int match_list(GtkListStore *list, const char *string)
+{
+	found_string_entry = 0;
+	gtk_tree_model_foreach(GTK_TREE_MODEL(list), match_string_entry, (void *)string);
+	return found_string_entry;
+}
+
+static GtkListStore *location_list, *people_list;
+
+static void add_string_list_entry(const char *string, GtkListStore *list)
+{
+	GtkTreeIter iter;
+
+	if (!string || !*string)
+		return;
+
+	if (match_list(list, string))
+		return;
+
+	/* Fixme! Check for duplicates! */
+	gtk_list_store_append(list, &iter);
+	gtk_list_store_set(list, &iter, 0, string, -1);
+}
+
+void add_people(const char *string)
+{
+	add_string_list_entry(string, people_list);
+}
+
+void add_location(const char *string)
+{
+	add_string_list_entry(string, location_list);
+}
+
 GtkWidget *extended_dive_info_widget(void)
 {
 	GtkWidget *vbox, *hbox;
 	vbox = gtk_vbox_new(FALSE, 6);
 
+	people_list = gtk_list_store_new(1, G_TYPE_STRING);
+	location_list = gtk_list_store_new(1, G_TYPE_STRING);
+
 	gtk_container_set_border_width(GTK_CONTAINER(vbox), 6);
-	location = text_entry(vbox, "Location");
+	location = text_entry(vbox, "Location", location_list);
 
 	hbox = gtk_hbox_new(FALSE, 3);
 	gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 0);
 
-	divemaster = text_entry(hbox, "Divemaster");
+	divemaster = text_entry(hbox, "Divemaster", people_list);
-	buddy = text_entry(hbox, "Buddy");
+	buddy = text_entry(hbox, "Buddy", people_list);
 
 	notes = text_view(vbox, "Notes");
 	return vbox;