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listbox: add support for :first-child, :last-child and others

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This applies the proper CSS child ordering semantics using GtkCssNode to
GtkListBox. You can now use :first-child, :last-child, :nth-child(), and
:last-nth-child() selectors.

For example, this allows styling row separators using CSS while ignoring
the separator on the last row.

 GtkListBoxRow {
   border-bottom: 1px solid @borders;
 }
 GtkListBoxRow:last-child {
   border-bottom: none;
 }

When the sort ordering of the listbox changes, we also update the CSS
node ordering.
This commit is contained in:
Christian Hergert 2015-05-29 20:03:11 -07:00
parent bb93c1cecd
commit aa07c40748
1 changed files with 45 additions and 0 deletions
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45
gtk/gtklistbox.c
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@ -18,6 +18,7 @@
#include "config.h"
#include "gtkadjustmentprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtklistbox.h"
#include "gtkwidget.h"
#include "gtkmarshalers.h"
@ -1166,6 +1167,25 @@ do_sort (GtkListBoxRow *a,
return priv->sort_func (a, b, priv->sort_func_target);
}
static void
gtk_list_box_css_node_foreach (gpointer data,
gpointer user_data)
{
GtkWidget **previous = user_data;
GtkWidget *row = data;
GtkCssNode *row_node;
GtkCssNode *prev_node;
if (*previous)
{
prev_node = gtk_widget_get_css_node (*previous);
row_node = gtk_widget_get_css_node (row);
gtk_css_node_set_after (row_node, prev_node);
}
*previous = row;
}
/**
* gtk_list_box_invalidate_sort:
* @box: a #GtkListBox
@ -1180,10 +1200,12 @@ void
gtk_list_box_invalidate_sort (GtkListBox *box)
{
GtkListBoxPrivate *priv = BOX_PRIV (box);
GtkWidget *previous = NULL;
g_return_if_fail (GTK_IS_LIST_BOX (box));
g_sequence_sort (priv->children, (GCompareDataFunc)do_sort, box);
g_sequence_foreach (priv->children, gtk_list_box_css_node_foreach, &previous);
gtk_list_box_invalidate_headers (box);
gtk_widget_queue_resize (GTK_WIDGET (box));
@ -2599,6 +2621,27 @@ gtk_list_box_prepend (GtkListBox *box,
gtk_list_box_insert (box, child, 0);
}
static void
gtk_list_box_insert_css_node (GtkListBox *box,
GtkWidget *child,
GSequenceIter *iter)
{
GSequenceIter *prev_iter;
GtkCssNode *child_node;
GtkCssNode *sibling_node;
GtkWidget *sibling;
child_node = gtk_widget_get_css_node (child);
prev_iter = g_sequence_iter_prev (iter);
if (prev_iter != iter)
{
sibling = g_sequence_get (prev_iter);
sibling_node = gtk_widget_get_css_node (sibling);
gtk_css_node_set_after (child_node, sibling_node);
}
}
/**
* gtk_list_box_insert:
* @box: a #GtkListBox
@ -2650,6 +2693,8 @@ gtk_list_box_insert (GtkListBox *box,
iter = g_sequence_insert_before (current_iter, row);
}
gtk_list_box_insert_css_node (box, GTK_WIDGET (row), iter);
ROW_PRIV (row)->iter = iter;
gtk_widget_set_parent (GTK_WIDGET (row), GTK_WIDGET (box));
gtk_widget_set_child_visible (GTK_WIDGET (row), TRUE);