+ # merge top-level sub-templates of $tem (object) into $this,
+ # supporting both new and old semantics.
+ function merge($tem) {
+ # append expansions to $this->data (old style)
+
+ $subs = $tem->top_subs('is_shown_sub_template');
+ if($subs) foreach($subs as $name => $val) {
+ $this->append($name, $val);
+ unset($tem->data[$name]); # so array_merge() won't overwrite things
+ }
+
+ # merge the data arrays and template trees (new style)
+ $this->data = array_merge($this->data, $tem->data);
+ merge_templates($this->template, $tem->template);
+ }
+
+ # see merge() above
+ function merge_file($filename) {
+ $other_tem = new tem();
+ $other_tem->load($filename);
+ $this->merge($other_tem);