1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) Johan Engelen 2007-2008 <j.b.c.engelen@utwente.nl>
4 * Abhishek Sharma
5 *
6 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
7 */
8
9 #include "live_effects/lpeobject.h"
10
11 #include "live_effects/effect.h"
12
13 #include "xml/repr.h"
14 #include "xml/node-event-vector.h"
15 #include "attributes.h"
16 #include "document.h"
17
18 #include "object/sp-defs.h"
19
20 //#define LIVEPATHEFFECT_VERBOSE
21
22 static void livepatheffect_on_repr_attr_changed (Inkscape::XML::Node * repr, const gchar *key, const gchar *oldval, const gchar *newval, bool is_interactive, void * data);
23
24 static Inkscape::XML::NodeEventVector const livepatheffect_repr_events = {
25 nullptr, /* child_added */
26 nullptr, /* child_removed */
27 livepatheffect_on_repr_attr_changed,
28 nullptr, /* content_changed */
29 nullptr /* order_changed */
30 };
31
32
LivePathEffectObject()33 LivePathEffectObject::LivePathEffectObject()
34 : SPObject(), effecttype(Inkscape::LivePathEffect::INVALID_LPE), effecttype_set(false),
35 lpe(nullptr)
36 {
37 #ifdef LIVEPATHEFFECT_VERBOSE
38 g_message("Init livepatheffectobject");
39 #endif
40 }
41
42 LivePathEffectObject::~LivePathEffectObject() = default;
43
44 /**
45 * Virtual build: set livepatheffect attributes from its associated XML node.
46 */
build(SPDocument * document,Inkscape::XML::Node * repr)47 void LivePathEffectObject::build(SPDocument *document, Inkscape::XML::Node *repr) {
48 g_assert(SP_IS_OBJECT(this));
49
50 SPObject::build(document, repr);
51
52 this->readAttr(SPAttr::PATH_EFFECT);
53
54 if (repr) {
55 repr->addListener (&livepatheffect_repr_events, this);
56 }
57
58 /* Register ourselves, is this necessary? */
59 // document->addResource("path-effect", object);
60 }
61
62 /**
63 * Virtual release of livepatheffect members before destruction.
64 */
release()65 void LivePathEffectObject::release() {
66 this->getRepr()->removeListenerByData(this);
67
68 /*
69 if (object->document) {
70 // Unregister ourselves
71 sp_document_removeResource(object->document, "livepatheffect", object);
72 }
73
74 if (gradient->ref) {
75 gradient->modified_connection.disconnect();
76 gradient->ref->detach();
77 delete gradient->ref;
78 gradient->ref = NULL;
79 }
80
81 gradient->modified_connection.~connection();
82 */
83
84 if (this->lpe) {
85 delete this->lpe;
86 this->lpe = nullptr;
87 }
88
89 this->effecttype = Inkscape::LivePathEffect::INVALID_LPE;
90
91 SPObject::release();
92 }
93
94 /**
95 * Virtual set: set attribute to value.
96 */
set(SPAttr key,gchar const * value)97 void LivePathEffectObject::set(SPAttr key, gchar const *value) {
98 #ifdef LIVEPATHEFFECT_VERBOSE
99 g_print("Set livepatheffect");
100 #endif
101
102 switch (key) {
103 case SPAttr::PATH_EFFECT:
104 if (this->lpe) {
105 delete this->lpe;
106 this->lpe = nullptr;
107 }
108
109 if ( value && Inkscape::LivePathEffect::LPETypeConverter.is_valid_key(value) ) {
110 this->effecttype = Inkscape::LivePathEffect::LPETypeConverter.get_id_from_key(value);
111 this->lpe = Inkscape::LivePathEffect::Effect::New(this->effecttype, this);
112 this->effecttype_set = true;
113 } else {
114 this->effecttype = Inkscape::LivePathEffect::INVALID_LPE;
115 this->lpe = nullptr;
116 this->effecttype_set = false;
117 }
118
119 this->requestModified(SP_OBJECT_MODIFIED_FLAG);
120 break;
121 }
122
123 SPObject::set(key, value);
124 }
125
126 /**
127 * Virtual write: write object attributes to repr.
128 */
write(Inkscape::XML::Document * xml_doc,Inkscape::XML::Node * repr,guint flags)129 Inkscape::XML::Node* LivePathEffectObject::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
130 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
131 repr = xml_doc->createElement("inkscape:path-effect");
132 }
133
134 if ((flags & SP_OBJECT_WRITE_ALL) || this->lpe) {
135 repr->setAttributeOrRemoveIfEmpty("effect", Inkscape::LivePathEffect::LPETypeConverter.get_key(this->effecttype));
136
137 this->lpe->writeParamsToSVG();
138 }
139
140 SPObject::write(xml_doc, repr, flags);
141
142 return repr;
143 }
144
145 static void
livepatheffect_on_repr_attr_changed(Inkscape::XML::Node *,const gchar * key,const gchar *,const gchar * newval,bool,void * data)146 livepatheffect_on_repr_attr_changed ( Inkscape::XML::Node * /*repr*/,
147 const gchar *key,
148 const gchar */*oldval*/,
149 const gchar *newval,
150 bool /*is_interactive*/,
151 void * data )
152 {
153 #ifdef LIVEPATHEFFECT_VERBOSE
154 g_print("livepatheffect_on_repr_attr_changed");
155 #endif
156
157 if (!data)
158 return;
159
160 LivePathEffectObject *lpeobj = (LivePathEffectObject*) data;
161 if (!lpeobj->get_lpe())
162 return;
163
164 lpeobj->get_lpe()->setParameter(key, newval);
165
166 lpeobj->requestModified(SP_OBJECT_MODIFIED_FLAG);
167 }
168
169 // Caution using this function, just compare id and same type of
170 // effect, we use on clipboard to do not fork in same doc on pastepatheffect
is_similar(LivePathEffectObject * that)171 bool LivePathEffectObject::is_similar(LivePathEffectObject *that)
172 {
173 if (that) {
174 const char *thisid = this->getId();
175 const char *thatid = that->getId();
176 if (!thisid || !thatid || strcmp(thisid, thatid) != 0) {
177 return false;
178 }
179 Inkscape::LivePathEffect::Effect *thislpe = this->get_lpe();
180 Inkscape::LivePathEffect::Effect *thatlpe = that->get_lpe();
181 if (thatlpe && thislpe && thislpe->getName() != thatlpe->getName()) {
182 return false;
183 }
184 }
185 return true;
186 }
187
188 /**
189 * If this has other users, create a new private duplicate and return it
190 * returns 'this' when no forking was necessary (and therefore no duplicate was made)
191 * Check out SPLPEItem::forkPathEffectsIfNecessary !
192 */
fork_private_if_necessary(unsigned int nr_of_allowed_users)193 LivePathEffectObject *LivePathEffectObject::fork_private_if_necessary(unsigned int nr_of_allowed_users)
194 {
195 if (hrefcount > nr_of_allowed_users) {
196 SPDocument *doc = this->document;
197 Inkscape::XML::Document *xml_doc = doc->getReprDoc();
198 Inkscape::XML::Node *dup_repr = this->getRepr()->duplicate(xml_doc);
199
200 doc->getDefs()->getRepr()->addChild(dup_repr, nullptr);
201 LivePathEffectObject *lpeobj_new = dynamic_cast<LivePathEffectObject *>(doc->getObjectByRepr(dup_repr));
202 Inkscape::GC::release(dup_repr);
203 // To regenerate ID
204 sp_object_ref(lpeobj_new, nullptr);
205 gchar *id = sp_object_get_unique_id(this, nullptr);
206 lpeobj_new->setAttribute("id", id);
207 g_free(id);
208 // Load all volatile vars of forked item
209 sp_object_unref(lpeobj_new, nullptr);
210 return lpeobj_new;
211 }
212 return this;
213 }
214
215 /*
216 Local Variables:
217 mode:c++
218 c-file-style:"stroustrup"
219 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
220 indent-tabs-mode:nil
221 fill-column:99
222 End:
223 */
224 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
225