if (cl->flags & SCOLS_FL_TREE)
tb->ntreecols--;
+ if (tb->dflt_sort_column == cl)
+ tb->dflt_sort_column = NULL;
DBG(TAB, ul_debugobj(tb, "remove column"));
list_del_init(&cl->cl_columns);
return 0;
}
+static int __scols_sort_tree(struct libscols_table *tb, struct libscols_column *cl)
+{
+ struct libscols_line *ln;
+ struct libscols_iter itr;
+
+ if (!tb || !cl || !cl->cmpfunc)
+ return -EINVAL;
+
+ scols_reset_iter(&itr, SCOLS_ITER_FORWARD);
+ while (scols_table_next_line(tb, &itr, &ln) == 0)
+ sort_line_children(ln, cl);
+ return 0;
+}
+
/**
* scols_sort_table:
* @tb: table
- * @cl: order by this column
+ * @cl: order by this column or NULL
*
* Orders the table by the column. See also scols_column_set_cmpfunc(). If the
* tree output is enabled then children in the tree are recursively sorted too.
*
+ * The column @cl is saved as the default sort column to the @tb and the next time
+ * is possible to call scols_sort_table(tb, NULL). The saved column is also used by
+ * scols_sort_table_by_tree().
+ *
* Returns: 0, a negative value in case of an error.
*/
int scols_sort_table(struct libscols_table *tb, struct libscols_column *cl)
{
- if (!tb || !cl || !cl->cmpfunc)
+ if (!tb)
+ return -EINVAL;
+ if (!cl)
+ cl = tb->dflt_sort_column;
+ if (!cl || !cl->cmpfunc)
return -EINVAL;
- DBG(TAB, ul_debugobj(tb, "sorting table"));
+ DBG(TAB, ul_debugobj(tb, "sorting table by %zu column", cl->seqnum));
list_sort(&tb->tb_lines, cells_cmp_wrapper_lines, cl);
- if (scols_table_is_tree(tb)) {
- struct libscols_line *ln;
- struct libscols_iter itr;
+ if (scols_table_is_tree(tb))
+ __scols_sort_tree(tb, cl);
- scols_reset_iter(&itr, SCOLS_ITER_FORWARD);
- while (scols_table_next_line(tb, &itr, &ln) == 0)
- sort_line_children(ln, cl);
- }
+ if (cl && cl != tb->dflt_sort_column)
+ tb->dflt_sort_column = cl;
return 0;
}
+/*
+ * Move all @ln's children after @ln in the table.
+ */
static struct libscols_line *move_line_and_children(struct libscols_line *ln, struct libscols_line *pre)
{
if (pre) {
list_del_init(&ln->ln_lines); /* remove from old position */
- list_add(&ln->ln_lines, &pre->ln_lines); /* add to the new place (behind @pre) */
+ list_add(&ln->ln_lines, &pre->ln_lines); /* add to the new place (after @pre) */
}
pre = ln;
* @tb: table
*
* Reorders lines in the table by parent->child relation. Note that order of
- * the lines in the table is independent on the tree hierarchy.
+ * the lines in the table is independent on the tree hierarchy by default.
+ *
+ * The children of the lines are sorted according to the default sort column
+ * if scols_sort_table() has been previously called.
*
* Since: 2.30
*
DBG(TAB, ul_debugobj(tb, "sorting table by tree"));
- scols_reset_iter(&itr, SCOLS_ITER_FORWARD);
- while (scols_table_next_line(tb, &itr, &ln) == 0) {
- if (ln->parent)
- continue;
+ if (tb->dflt_sort_column)
+ __scols_sort_tree(tb, tb->dflt_sort_column);
+ scols_reset_iter(&itr, SCOLS_ITER_FORWARD);
+ while (scols_table_next_line(tb, &itr, &ln) == 0)
move_line_and_children(ln, NULL);
- }
return 0;
}