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
|
/* $Id: xml_hierarchy.pl,v 1.5 2002/02/01 15:04:51 jan Exp $
Part of XPCE --- The SWI-Prolog GUI toolkit
Author: Jan Wielemaker and Anjo Anjewierden
E-mail: jan@swi.psy.uva.nl
WWW: http://www.swi.psy.uva.nl/projects/xpce/
Copyright (C): 1985-2002, University of Amsterdam
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 Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
As a special exception, if you link this library with other files,
compiled with a Free Software compiler, to produce an executable, this
library does not by itself cause the resulting executable to be covered
by the GNU General Public License. This exception does not however
invalidate any other reasons why the executable file might be covered by
the GNU General Public License.
*/
:- module(xml_hierarchy, []).
:- use_module(library(pce)).
:- use_module(library(pce_toc)).
:- require([ memberchk/2
, append/3
, nth1/3
]).
resource(open, image, image('16x16/book2.xpm')).
resource(close, image, image('16x16/manual.xpm')).
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Show hierarchy of elements as produced by xml2pl. This class is kept as
simple as possible. In general it requires subclassing and defining the
select_node message to do anything sensible. See class toc_window for
details on programming this library.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
:- pce_begin_class(xml_hierarchy, toc_window,
"Browse XML document hierarchy").
variable(xml, prolog, get, "Represented XML term").
initialise(H, XML:prolog) :->
send_super(H, initialise),
send(H, xml, XML).
xml(H, XML:prolog) :-> % list of elements
"Visualise an XML structure"::
content(XML, Content),
send(H, slot, xml, Content),
get(H, icon, Content, @on, Icons),
get(H, caption, Content, Caption),
send(H, root, xml_node(Caption, [], Icons, @on)),
send(H, expand_root).
content(document(_Type, [Content]), Content).
content([Content], Content).
content(element(A,B,C), element(A,B,C)).
content([pi(_XML), Content], Content). % bit of a hack to handle XML files
expand_node(H, Node:xml_node) :->
"Expand clicked node"::
get(Node, xml, element(_Name, _Attributes, Content)),
get(Node, path, Loc0),
append(Loc0, [Index], Loc),
( nth1(Index, Content, Esub),
get(H, caption, Esub, Name),
arg(3, Esub, SubContent),
( memberchk(element(_,_,_), SubContent)
-> get(H, icon, Esub, @on, Icons),
send(H, son, Node, xml_node(Name, Loc, Icons, @on))
; get(H, icon, Esub, @on, Icons),
send(H, son, Node, xml_node(Name, Loc, Icons, @off))
),
fail
; true
).
:- pce_group(refine).
caption(_, XML:prolog, Title:name) :<-
"Get title for a node"::
XML = element(Title, _, _).
icon(_H, _XML:prolog, _HasSub:bool, Tuple:tuple) :<-
"Return open/close icon"::
new(Tuple, tuple(image(resource(open)),
image(resource(close)))).
:- pce_end_class.
:- pce_begin_class(xml_node, toc_folder,
"Show XML node with sub-nodes").
variable(path, prolog, get, "Path from root").
initialise(Node, Name:name, Path:prolog, Icons:tuple, CanExpand:bool) :->
get(Icons, first, Open),
get(Icons, second, Close),
send_super(Node, initialise, Name, @default, Close, Open, CanExpand),
send(Node, slot, path, Path).
xml(Node, XML:prolog) :<-
"Get XML as Prolog term"::
get(Node?tree, window, Window),
get(Window, xml, Content),
get(Node, path, Path),
find_xml(Path, Content, XML).
find_xml([], XML, XML) :- !.
find_xml([H|T], element(_, _, Content), XML) :-
nth1(H, Content, XML0),
find_xml(T, XML0, XML).
:- pce_end_class.
|
