/usr/share/guile-gnome-2/gnome/contrib/delay-tree-model.scm is in guile-gnome2-gtk 2.16.2-1.1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | ;; guile-gnome
;; Copyright (C) 2003,2004 Andy Wingo <wingo at pobox dot com>
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 2 of
;; the License, or (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; if not, contact:
;;
;; Free Software Foundation Voice: +1-617-542-5942
;; 59 Temple Place - Suite 330 Fax: +1-617-542-2652
;; Boston, MA 02111-1307, USA gnu@gnu.org
;;; Commentary:
;;
;;A lazy tree model. The value of the rows, as well the rows' children,
;;are promises made by the @code{delay} operator.
;;
;;; Code:
(define-module (gnome contrib delay-tree-model)
#:use-module (oop goops)
#:use-module (gnome gobject)
#:use-module (gnome gtk)
#:use-module (container nodal-tree)
#:use-module (container delay-tree)
#:use-module (scheme documentation)
#:export (<delay-tree-model> append-root!))
(define-class-with-docs <delay-tree-model> (<guile-gtk-tree-model>)
"An interface that exports delay trees as GTK+ tree models. Suitable
for use with @code{<gtk-tree-view>}."
(top-nodes #:init-value '()))
(define-method (on-get-n-columns (obj <delay-tree-model>))
2) ;; name and value
(define-method (on-get-column-type (obj <delay-tree-model>) index)
(case index
((0) <gchararray>)
((1) <gboxed-scm>)
(else (error "Invalid index:" index))))
(define-method (on-get-iter (obj <delay-tree-model>) path)
(let loop ((node #f) (path path))
(if (null? path)
node
(let ((children (if node
(force-ref node 'children)
(slot-ref obj 'top-nodes))))
(cond
((null? children) ;; can be the case for path == (0)
#f)
((>= (car path) (length children))
#f) ;; nonexistent path, but no error
(else
(loop (list-ref children (car path)) (cdr path))))))))
(define-method (on-get-path (obj <delay-tree-model>) iter)
(let loop ((node iter) (path '()))
(let ((parent (node-ref node 'parent)))
(if (not parent)
(cons (list-index (slot-ref obj 'top-nodes) node) path)
(loop parent
(cons (list-index (node-ref parent 'children) node) path))))))
(define-method (on-get-value (obj <delay-tree-model>) iter index)
(case index
((0)
(force-ref iter 'name))
((1)
(force-ref iter 'value))
(else
(error "Invalid index" index))))
(define-method (on-iter-next (obj <delay-tree-model>) iter)
(let* ((parent (node-ref iter 'parent))
(siblings (if parent
(node-ref parent 'children)
(slot-ref obj 'top-nodes)))
(new-position (1+ (list-index siblings iter))))
(and (< new-position (length siblings))
(list-ref siblings new-position))))
(define-method (on-iter-children (obj <delay-tree-model>) parent)
(let ((children (if parent
(force-ref parent 'children)
(slot-ref obj 'top-nodes))))
(and (pair? children)
(car children))))
(define-method (on-iter-has-child (obj <delay-tree-model>) iter)
;; would be nice to avoid forcing the children if there are none.
(not (null? (force-ref iter 'children))))
(define-method (on-iter-n-children (obj <delay-tree-model>) iter)
(length (if iter
(force-ref iter 'children)
(slot-ref obj 'top-nodes))))
(define-method (on-iter-nth-child (obj <delay-tree-model>) parent n)
(let ((children (if parent
(force-ref parent 'children)
(slot-ref obj 'top-nodes))))
(and (< n (length children))
(list-ref children n))))
(define-method (on-iter-parent (obj <delay-tree-model>) iter)
(node-ref iter 'parent))
;; To the on-* methods, the iter is just a scheme object. But outside
;; those methods it is a boxed type. So we need to call the Gtk+
;; notification functions (row-inserted, row-has-child-toggled) with the
;; boxed types, not with SCM values.
(define-method (append-root! (obj <delay-tree-model>) delay-tree)
(define (emit-signals path)
(row-inserted obj path (get-iter obj path)))
(slot-set! obj 'top-nodes (append! (slot-ref obj 'top-nodes)
(list delay-tree)))
(let ((path (get-path obj (get-iter obj (on-get-path obj delay-tree)))))
(emit-signals path)
(get-iter obj path)))
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