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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/*
* SVG <switch> implementation
*
* Authors:
* Andrius R. <knutux@gmail.com>
* MenTaLguY <mental@rydia.net>
* Jon A. Cruz <jon@joncruz.org>
* Abhishek Sharma
*
* Copyright (C) 2006 authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glibmm/i18n.h>
#include "sp-switch.h"
#include "display/drawing-group.h"
#include "conditions.h"
#include <sigc++/functors/ptr_fun.h>
#include <sigc++/adaptors/bind.h>
static void sp_switch_class_init (SPSwitchClass *klass);
static void sp_switch_init (SPSwitch *group);
static SPGroupClass * parent_class;
GType CSwitch::getType (void)
{
static GType switch_type = 0;
if (!switch_type) {
GTypeInfo switch_info = {
sizeof (SPSwitchClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) sp_switch_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (SPSwitch),
16, /* n_preallocs */
(GInstanceInitFunc) sp_switch_init,
NULL, /* value_table */
};
switch_type = g_type_register_static (SP_TYPE_GROUP, "SPSwitch", &switch_info, (GTypeFlags)0);
}
return switch_type;
}
static void
sp_switch_class_init (SPSwitchClass *) {
parent_class = (SPGroupClass *)g_type_class_ref (SP_TYPE_GROUP);
}
static void sp_switch_init (SPSwitch *group)
{
if (group->group)
delete group->group;
group->group = new CSwitch(group);
}
CSwitch::CSwitch(SPGroup *group) : CGroup(group), _cached_item(NULL) {
}
CSwitch::~CSwitch() {
_releaseLastItem(_cached_item);
}
SPObject *CSwitch::_evaluateFirst() {
SPObject *first = 0;
for (SPObject *child = _group->firstChild() ; child && !first ; child = child->getNext() ) {
if (SP_IS_ITEM(child) && sp_item_evaluate(SP_ITEM(child))) {
first = child;
}
}
return first;
}
GSList *CSwitch::_childList(bool add_ref, SPObject::Action action) {
if ( action != SPObject::ActionGeneral ) {
return _group->childList(add_ref, action);
}
SPObject *child = _evaluateFirst();
if (NULL == child)
return NULL;
if (add_ref)
g_object_ref (G_OBJECT (child));
return g_slist_prepend (NULL, child);
}
gchar *CSwitch::getDescription() {
gint len = getItemCount();
return g_strdup_printf(
ngettext("<b>Conditional group</b> of <b>%d</b> object",
"<b>Conditional group</b> of <b>%d</b> objects",
len), len);
}
void CSwitch::onChildAdded(Inkscape::XML::Node *) {
_reevaluate(true);
}
void CSwitch::onChildRemoved(Inkscape::XML::Node *) {
_reevaluate();
}
void CSwitch::onOrderChanged (Inkscape::XML::Node *, Inkscape::XML::Node *, Inkscape::XML::Node *)
{
_reevaluate();
}
void CSwitch::_reevaluate(bool /*add_to_drawing*/) {
SPObject *evaluated_child = _evaluateFirst();
if (!evaluated_child || _cached_item == evaluated_child) {
return;
}
_releaseLastItem(_cached_item);
for ( GSList *l = _childList(false, SPObject::ActionShow);
NULL != l ; l = g_slist_remove (l, l->data))
{
SPObject *o = SP_OBJECT (l->data);
if ( !SP_IS_ITEM (o) ) {
continue;
}
SPItem * child = SP_ITEM(o);
child->setEvaluated(o == evaluated_child);
}
_cached_item = evaluated_child;
_release_connection = evaluated_child->connectRelease(sigc::bind(sigc::ptr_fun(&CSwitch::_releaseItem), this));
_group->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
}
void CSwitch::_releaseItem(SPObject *obj, CSwitch *selection)
{
selection->_releaseLastItem(obj);
}
void CSwitch::_releaseLastItem(SPObject *obj)
{
if (NULL == _cached_item || _cached_item != obj)
return;
_release_connection.disconnect();
_cached_item = NULL;
}
void CSwitch::_showChildren (Inkscape::Drawing &drawing, Inkscape::DrawingItem *ai, unsigned int key, unsigned int flags) {
SPObject *evaluated_child = _evaluateFirst();
GSList *l = _childList(false, SPObject::ActionShow);
while (l) {
SPObject *o = SP_OBJECT (l->data);
if (SP_IS_ITEM (o)) {
SPItem * child = SP_ITEM(o);
child->setEvaluated(o == evaluated_child);
Inkscape::DrawingItem *ac = child->invoke_show (drawing, key, flags);
if (ac) {
ai->appendChild(ac);
}
}
l = g_slist_remove (l, o);
}
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
|