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API: Add support for siblings to widget paths

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This commit is contained in:
Benjamin Otte 2011-05-27 18:22:09 +02:00
parent b669efa1a3
commit 79de8e4d08
4 changed files with 121 additions and 5 deletions
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3
docs/reference/gtk/gtk3-sections.txt
View File

@ -5416,6 +5416,7 @@ GTK_CHECK_VERSION
<TITLE>GtkWidgetPath</TITLE>
GtkWidgetPath
gtk_widget_path_append_type
gtk_widget_path_append_with_siblings
gtk_widget_path_copy
gtk_widget_path_ref
gtk_widget_path_unref
@ -5429,6 +5430,8 @@ gtk_widget_path_iter_clear_classes
gtk_widget_path_iter_clear_regions
gtk_widget_path_iter_get_name
gtk_widget_path_iter_get_object_type
gtk_widget_path_iter_get_siblings
gtk_widget_path_iter_get_sibling_index
gtk_widget_path_iter_has_class
gtk_widget_path_iter_has_name
gtk_widget_path_iter_has_qclass

3
gtk/gtk.symbols
View File

@ -3577,6 +3577,7 @@ gtk_widget_override_font
gtk_widget_override_symbolic_color
gtk_widget_path
gtk_widget_path_append_type
gtk_widget_path_append_with_siblings
gtk_widget_path_copy
gtk_widget_path_ref
gtk_widget_path_unref
@ -3591,6 +3592,8 @@ gtk_widget_path_iter_clear_classes
gtk_widget_path_iter_clear_regions
gtk_widget_path_iter_get_name
gtk_widget_path_iter_get_object_type
gtk_widget_path_iter_get_siblings
gtk_widget_path_iter_get_sibling_index
gtk_widget_path_iter_has_class
gtk_widget_path_iter_has_name
gtk_widget_path_iter_has_qclass

102
gtk/gtkwidgetpath.c
View File

@ -93,6 +93,8 @@ struct GtkPathElement
GQuark name;
GHashTable *regions;
GArray *classes;
GtkWidgetPath *siblings;
guint sibling_index;
};
struct _GtkWidgetPath
@ -131,6 +133,9 @@ gtk_path_element_copy (GtkPathElement *dest,
dest->type = src->type;
dest->name = src->name;
if (src->siblings)
dest->siblings = gtk_widget_path_ref (src->siblings);
dest->sibling_index = src->sibling_index;
if (src->regions)
{
@ -235,6 +240,9 @@ gtk_widget_path_unref (GtkWidgetPath *path)
if (elem->classes)
g_array_free (elem->classes, TRUE);
if (elem->siblings)
gtk_widget_path_unref (elem->siblings);
}
g_array_free (path->elems, TRUE);
@ -409,6 +417,100 @@ gtk_widget_path_append_type (GtkWidgetPath *path,
return path->elems->len - 1;
}
/**
* gtk_widget_path_append_with_siblings:
* @path: the widget path to append to
* @siblings: a widget path describing a list of siblings. This path
* may not contain any siblings itself and it must not be modified
* afterwards.
* @sibling_index: index into @siblings for where the added element is
* positioned.
*
* Appends a widget type with all its siblings to the widget hierarchy
* represented by @path. Using this function instead of
* gtk_widget_path_append_type() will allow the CSS theming to use
* sibling matches in selectors and apply :nth-child() pseudo classes.
* In turn, it requires a lot more care in widget implementations as
* widgets need to make sure to call gtk_widget_reset_style() on all
* involved widgets when the @siblings path changes.
*
* Returns: the position where the element was inserted.
*
* Since: 3.2
**/
gint
gtk_widget_path_append_with_siblings (GtkWidgetPath *path,
GtkWidgetPath *siblings,
guint sibling_index)
{
GtkPathElement new;
g_return_val_if_fail (path != NULL, 0);
g_return_val_if_fail (siblings != NULL, 0);
g_return_val_if_fail (sibling_index < gtk_widget_path_length (siblings), 0);
gtk_path_element_copy (&new, &g_array_index (siblings->elems, GtkPathElement, sibling_index));
new.siblings = gtk_widget_path_ref (siblings);
new.sibling_index = sibling_index;
g_array_append_val (path->elems, new);
return path->elems->len - 1;
}
/**
* gtk_widget_path_iter_get_siblings:
* @path: a #GtkWidgetPath
* @pos: position to get the siblings for, -1 for the path head
*
* Returns the list of siblings for the element at @pos. If the element
* was not added with siblings, %NULL is returned.
*
* Returns: %NULL or the list of siblings for the element at @pos.
**/
const GtkWidgetPath *
gtk_widget_path_iter_get_siblings (const GtkWidgetPath *path,
gint pos)
{
GtkPathElement *elem;
g_return_val_if_fail (path != NULL, G_TYPE_INVALID);
g_return_val_if_fail (path->elems->len != 0, G_TYPE_INVALID);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
return elem->siblings;
}
/**
* gtk_widget_path_iter_get_sibling_index:
* @path: a #GtkWidgetPath
* @pos: position to get the sibling index for, -1 for the path head
*
* Returns the index into the list of siblings for the element at @pos as
* returned by gtk_widget_path_iter_get_siblings(). If that function would
* return %NULL because the element at @pos has no siblings, this function
* will return 0.
*
* Returns: 0 or the index into the list of siblings for the element at @pos.
**/
guint
gtk_widget_path_iter_get_sibling_index (const GtkWidgetPath *path,
gint pos)
{
GtkPathElement *elem;
g_return_val_if_fail (path != NULL, G_TYPE_INVALID);
g_return_val_if_fail (path->elems->len != 0, G_TYPE_INVALID);
if (pos < 0 || pos >= path->elems->len)
pos = path->elems->len - 1;
elem = &g_array_index (path->elems, GtkPathElement, pos);
return elem->sibling_index;
}
/**
* gtk_widget_path_iter_get_object_type:
* @path: a #GtkWidgetPath

18
gtk/gtkwidgetpath.h
View File

@ -52,15 +52,23 @@ gint gtk_widget_path_append_type (GtkWidgetPath *path,
GType type);
void gtk_widget_path_prepend_type (GtkWidgetPath *path,
GType type);
gint gtk_widget_path_append_with_siblings(GtkWidgetPath *path,
GtkWidgetPath *siblings,
guint sibling_index);
/* gtk_widget_path_append_for_widget() is declared in gtkwidget.c */
gint gtk_widget_path_append_for_widget (GtkWidgetPath *path,
GtkWidget *widget);
GType gtk_widget_path_iter_get_object_type (const GtkWidgetPath *path,
gint pos);
void gtk_widget_path_iter_set_object_type (GtkWidgetPath *path,
gint pos,
GType type);
GType gtk_widget_path_iter_get_object_type (const GtkWidgetPath *path,
gint pos);
void gtk_widget_path_iter_set_object_type (GtkWidgetPath *path,
gint pos,
GType type);
const GtkWidgetPath *
gtk_widget_path_iter_get_siblings (const GtkWidgetPath *path,
gint pos);
guint gtk_widget_path_iter_get_sibling_index(const GtkWidgetPath *path,
gint pos);
G_CONST_RETURN gchar * gtk_widget_path_iter_get_name (const GtkWidgetPath *path,
gint pos);