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-rw-r--r--src/live_effects/lpeobject.cpp224
1 files changed, 224 insertions, 0 deletions
diff --git a/src/live_effects/lpeobject.cpp b/src/live_effects/lpeobject.cpp
new file mode 100644
index 0000000..7a17364
--- /dev/null
+++ b/src/live_effects/lpeobject.cpp
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Johan Engelen 2007-2008 <j.b.c.engelen@utwente.nl>
+ * Abhishek Sharma
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "live_effects/lpeobject.h"
+
+#include "live_effects/effect.h"
+
+#include "xml/repr.h"
+#include "xml/node-event-vector.h"
+#include "attributes.h"
+#include "document.h"
+
+#include "object/sp-defs.h"
+
+//#define LIVEPATHEFFECT_VERBOSE
+
+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);
+
+static Inkscape::XML::NodeEventVector const livepatheffect_repr_events = {
+ nullptr, /* child_added */
+ nullptr, /* child_removed */
+ livepatheffect_on_repr_attr_changed,
+ nullptr, /* content_changed */
+ nullptr /* order_changed */
+};
+
+
+LivePathEffectObject::LivePathEffectObject()
+ : SPObject(), effecttype(Inkscape::LivePathEffect::INVALID_LPE), effecttype_set(false),
+ lpe(nullptr)
+{
+#ifdef LIVEPATHEFFECT_VERBOSE
+ g_message("Init livepatheffectobject");
+#endif
+}
+
+LivePathEffectObject::~LivePathEffectObject() = default;
+
+/**
+ * Virtual build: set livepatheffect attributes from its associated XML node.
+ */
+void LivePathEffectObject::build(SPDocument *document, Inkscape::XML::Node *repr) {
+ g_assert(SP_IS_OBJECT(this));
+
+ SPObject::build(document, repr);
+
+ this->readAttr(SPAttr::PATH_EFFECT);
+
+ if (repr) {
+ repr->addListener (&livepatheffect_repr_events, this);
+ }
+
+ /* Register ourselves, is this necessary? */
+// document->addResource("path-effect", object);
+}
+
+/**
+ * Virtual release of livepatheffect members before destruction.
+ */
+void LivePathEffectObject::release() {
+ this->getRepr()->removeListenerByData(this);
+
+/*
+ if (object->document) {
+ // Unregister ourselves
+ sp_document_removeResource(object->document, "livepatheffect", object);
+ }
+
+ if (gradient->ref) {
+ gradient->modified_connection.disconnect();
+ gradient->ref->detach();
+ delete gradient->ref;
+ gradient->ref = NULL;
+ }
+
+ gradient->modified_connection.~connection();
+*/
+
+ if (this->lpe) {
+ delete this->lpe;
+ this->lpe = nullptr;
+ }
+
+ this->effecttype = Inkscape::LivePathEffect::INVALID_LPE;
+
+ SPObject::release();
+}
+
+/**
+ * Virtual set: set attribute to value.
+ */
+void LivePathEffectObject::set(SPAttr key, gchar const *value) {
+#ifdef LIVEPATHEFFECT_VERBOSE
+ g_print("Set livepatheffect");
+#endif
+
+ switch (key) {
+ case SPAttr::PATH_EFFECT:
+ if (this->lpe) {
+ delete this->lpe;
+ this->lpe = nullptr;
+ }
+
+ if ( value && Inkscape::LivePathEffect::LPETypeConverter.is_valid_key(value) ) {
+ this->effecttype = Inkscape::LivePathEffect::LPETypeConverter.get_id_from_key(value);
+ this->lpe = Inkscape::LivePathEffect::Effect::New(this->effecttype, this);
+ this->effecttype_set = true;
+ } else {
+ this->effecttype = Inkscape::LivePathEffect::INVALID_LPE;
+ this->lpe = nullptr;
+ this->effecttype_set = false;
+ }
+
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+ break;
+ }
+
+ SPObject::set(key, value);
+}
+
+/**
+ * Virtual write: write object attributes to repr.
+ */
+Inkscape::XML::Node* LivePathEffectObject::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+ if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+ repr = xml_doc->createElement("inkscape:path-effect");
+ }
+
+ if ((flags & SP_OBJECT_WRITE_ALL) || this->lpe) {
+ repr->setAttributeOrRemoveIfEmpty("effect", Inkscape::LivePathEffect::LPETypeConverter.get_key(this->effecttype));
+
+ this->lpe->writeParamsToSVG();
+ }
+
+ SPObject::write(xml_doc, repr, flags);
+
+ return repr;
+}
+
+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 )
+{
+#ifdef LIVEPATHEFFECT_VERBOSE
+ g_print("livepatheffect_on_repr_attr_changed");
+#endif
+
+ if (!data)
+ return;
+
+ LivePathEffectObject *lpeobj = (LivePathEffectObject*) data;
+ if (!lpeobj->get_lpe())
+ return;
+
+ lpeobj->get_lpe()->setParameter(key, newval);
+
+ lpeobj->requestModified(SP_OBJECT_MODIFIED_FLAG);
+}
+
+// Caution using this function, just compare id and same type of
+// effect, we use on clipboard to do not fork in same doc on pastepatheffect
+bool LivePathEffectObject::is_similar(LivePathEffectObject *that)
+{
+ if (that) {
+ const char *thisid = this->getId();
+ const char *thatid = that->getId();
+ if (!thisid || !thatid || strcmp(thisid, thatid) != 0) {
+ return false;
+ }
+ Inkscape::LivePathEffect::Effect *thislpe = this->get_lpe();
+ Inkscape::LivePathEffect::Effect *thatlpe = that->get_lpe();
+ if (thatlpe && thislpe && thislpe->getName() != thatlpe->getName()) {
+ return false;
+ }
+ }
+ return true;
+}
+
+/**
+ * If this has other users, create a new private duplicate and return it
+ * returns 'this' when no forking was necessary (and therefore no duplicate was made)
+ * Check out SPLPEItem::forkPathEffectsIfNecessary !
+ */
+LivePathEffectObject *LivePathEffectObject::fork_private_if_necessary(unsigned int nr_of_allowed_users)
+{
+ if (hrefcount > nr_of_allowed_users) {
+ SPDocument *doc = this->document;
+ Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+ Inkscape::XML::Node *dup_repr = this->getRepr()->duplicate(xml_doc);
+
+ doc->getDefs()->getRepr()->addChild(dup_repr, nullptr);
+ LivePathEffectObject *lpeobj_new = dynamic_cast<LivePathEffectObject *>(doc->getObjectByRepr(dup_repr));
+ Inkscape::GC::release(dup_repr);
+ // To regenerate ID
+ sp_object_ref(lpeobj_new, nullptr);
+ gchar *id = sp_object_get_unique_id(this, nullptr);
+ lpeobj_new->setAttribute("id", id);
+ g_free(id);
+ // Load all volatile vars of forked item
+ sp_object_unref(lpeobj_new, nullptr);
+ return lpeobj_new;
+ }
+ return this;
+}
+
+/*
+ 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 :