Add a little statusbar below the commit message text widget

Display line and column number below the commit message widget in the
commit dialog. This helps to see how long the entered message is, e.g.
when you want to ensure GIT commit messages' first line is only about
72 characters long.

geanyvc/src/geanyvc.c

@@ -1301,6 +1301,26 @@ static void commit_tree_selection_changed_cb(GtkTreeSelection *sel, GtkTextView
 	g_free(path);
 }
 
+static gboolean commit_text_line_number_update_cb(GtkWidget *widget, GdkEvent *event,
+												  gpointer user_data)
+{
+	GtkWidget *text_view = widget;
+	GtkLabel *line_column_label = GTK_LABEL(user_data);
+	GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_view));
+	GtkTextMark *mark = gtk_text_buffer_get_insert(buffer);
+	GtkTextIter iter;
+	gint line, column;
+	gchar text[64];
+
+	gtk_text_buffer_get_iter_at_mark(buffer, &iter, mark);
+	line = gtk_text_iter_get_line(&iter) + 1;
+	column = gtk_text_iter_get_line_offset(&iter);
+
+	g_snprintf(text, sizeof(text), _("Line :%d Column: %d"), line, column);
+	gtk_label_set_text(line_column_label, text);
+
+	return FALSE;
+}
 
 static GtkWidget *
 create_commitDialog(void)
@@ -1323,6 +1343,8 @@ create_commitDialog(void)
 	GtkWidget *btnCancel;
 	GtkWidget *btnCommit;
 	GtkWidget *select_cbox;
+	GtkWidget *commit_text_vbox;
+	GtkWidget *lineColumnLabel;
 	GtkTreeSelection *sel;
 
 	gchar *rcstyle = g_strdup_printf("style \"geanyvc-diff-font\"\n"
@@ -1408,14 +1430,17 @@ create_commitDialog(void)
 	gtk_container_add(GTK_CONTAINER(frame1), alignment1);
 	gtk_alignment_set_padding(GTK_ALIGNMENT(alignment1), 0, 0, 12, 0);
 
+	commit_text_vbox = gtk_vbox_new(FALSE, 0);
+	gtk_widget_show(commit_text_vbox);
+	gtk_container_add(GTK_CONTAINER(alignment1), commit_text_vbox);
+
 	scrolledwindow3 = gtk_scrolled_window_new(NULL, NULL);
 	gtk_widget_show(scrolledwindow3);
-	gtk_container_add(GTK_CONTAINER(alignment1), scrolledwindow3);
+	gtk_box_pack_start(GTK_BOX(commit_text_vbox), scrolledwindow3, TRUE, TRUE, 0);
 	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwindow3), GTK_POLICY_AUTOMATIC,
 				       GTK_POLICY_AUTOMATIC);
 	gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolledwindow3), GTK_SHADOW_IN);
 
-
 	textCommitMessage = gtk_text_view_new();
 	gtk_widget_show(textCommitMessage);
 	gtk_container_add(GTK_CONTAINER(scrolledwindow3), textCommitMessage);
@@ -1428,6 +1453,12 @@ create_commitDialog(void)
 	gtk_frame_set_label_widget(GTK_FRAME(frame1), label1);
 	gtk_label_set_use_markup(GTK_LABEL(label1), TRUE);
 
+	/* line/column status label */
+	lineColumnLabel = gtk_label_new("");
+	gtk_misc_set_alignment(GTK_MISC(lineColumnLabel), 0, 0.5);
+	gtk_box_pack_end(GTK_BOX(commit_text_vbox), lineColumnLabel, TRUE, TRUE, 0);
+	gtk_widget_show(lineColumnLabel);
+
 	dialog_action_area1 = GTK_DIALOG(commitDialog)->action_area;
 	gtk_widget_show(dialog_action_area1);
 	gtk_button_box_set_layout(GTK_BUTTON_BOX(dialog_action_area1), GTK_BUTTONBOX_END);
@@ -1444,6 +1475,13 @@ create_commitDialog(void)
 	gtk_tree_selection_set_mode(sel, GTK_SELECTION_SINGLE);
 	g_signal_connect(sel, "changed", G_CALLBACK(commit_tree_selection_changed_cb), textDiff);
 
+	g_signal_connect(textCommitMessage, "key-release-event",
+		G_CALLBACK(commit_text_line_number_update_cb), lineColumnLabel);
+	g_signal_connect(textCommitMessage, "button-release-event",
+		G_CALLBACK(commit_text_line_number_update_cb), lineColumnLabel);
+	/* initial setup */
+	commit_text_line_number_update_cb(textCommitMessage, NULL, lineColumnLabel);
+
 	/* Store pointers to all widgets, for use by lookup_widget(). */
 	GLADE_HOOKUP_OBJECT_NO_REF(commitDialog, commitDialog, "commitDialog");
 	GLADE_HOOKUP_OBJECT_NO_REF(commitDialog, dialog_vbox1, "dialog_vbox1");