diff options
| -rw-r--r-- | docs/pango-sections.txt | 1 | ||||
| -rw-r--r-- | pango/pango-attributes.c | 76 | ||||
| -rw-r--r-- | pango/pango-attributes.h | 4 |
3 files changed, 81 insertions, 0 deletions
diff --git a/docs/pango-sections.txt b/docs/pango-sections.txt index e87b8750..4648816b 100644 --- a/docs/pango-sections.txt +++ b/docs/pango-sections.txt @@ -440,6 +440,7 @@ pango_attr_list_filter pango_attr_list_update PangoAttrFilterFunc pango_attr_list_get_attributes +pango_attr_list_equal pango_attr_list_get_iterator PangoAttrIterator pango_attr_iterator_copy diff --git a/pango/pango-attributes.c b/pango/pango-attributes.c index 2d2dd2a2..03a45de4 100644 --- a/pango/pango-attributes.c +++ b/pango/pango-attributes.c @@ -1916,6 +1916,82 @@ pango_attr_list_get_attributes (PangoAttrList *list) return g_slist_copy_deep (list->attributes, (GCopyFunc)pango_attribute_copy, NULL); } +/** + * pango_attr_list_equal: + * @list: a #PangoAttrList + * @other_list: the other #PangoAttrList + * + * Checks whether @list and @other_list contain the same attributes and + * whether those attributes apply to the same ranges. Beware that this + * will return wrong values if any list contains duplicates. + * + * Return value: %TRUE if the lists are equal, %FALSE if they aren't. + * + * Since: 1.46 + */ +gboolean +pango_attr_list_equal (PangoAttrList *list, + PangoAttrList *other_list) +{ + GSList *attrs, *other_attrs; + GSList *iter = NULL; + guint attrs_length = 0; + guint64 skip_bitmask = 0; + + if (list == other_list) + return TRUE; + + if (list == NULL || other_list == NULL) + return FALSE; + + attrs = list->attributes; + other_attrs = other_list->attributes; + + for (iter = attrs; iter != NULL; iter = iter->next) + { + PangoAttribute *attr = iter->data; + GSList *other_iter = NULL; + gboolean attr_equal = FALSE; + guint other_attr_index = 0; + + attrs_length++; + + for (other_iter = other_attrs; + other_iter != NULL; + other_iter = other_iter->next) + { + PangoAttribute *other_attr = other_iter->data; + guint64 other_attr_bitmask = + other_attr_index < 64 ? 1 << other_attr_index : 0; + + if ((skip_bitmask & other_attr_bitmask) != 0) + { + other_attr_index++; + continue; + } + + if (attr->start_index == other_attr->start_index && + attr->end_index == other_attr->end_index && + pango_attribute_equal (attr, other_attr)) + { + skip_bitmask |= other_attr_bitmask; + attr_equal = TRUE; + break; + } + + other_attr_index++; + } + + if (!attr_equal) + return FALSE; + } + + if (attrs_length != g_slist_length (other_attrs)) + return FALSE; + + return TRUE; +} + G_DEFINE_BOXED_TYPE (PangoAttrIterator, pango_attr_iterator, pango_attr_iterator_copy, diff --git a/pango/pango-attributes.h b/pango/pango-attributes.h index 09d1a69a..6f6622ab 100644 --- a/pango/pango-attributes.h +++ b/pango/pango-attributes.h @@ -633,6 +633,10 @@ PangoAttrList *pango_attr_list_filter (PangoAttrList *list, PANGO_AVAILABLE_IN_1_44 GSList *pango_attr_list_get_attributes (PangoAttrList *list); +PANGO_AVAILABLE_IN_1_46 +gboolean pango_attr_list_equal (PangoAttrList *list, + PangoAttrList *other_list); + PANGO_AVAILABLE_IN_1_44 GType pango_attr_iterator_get_type (void) G_GNUC_CONST; |