sp-clippath.cpp revision f4c6d66fb53f5e70712bdd303cc00a453566180a
/*
* SVG <clipPath> implementation
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Jon A. Cruz <jon@joncruz.org>
* Abhishek Sharma
*
* Copyright (C) 2001-2002 authors
* Copyright (C) 2001 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <cstring>
#include <string>
#include "display/drawing.h"
#include "display/drawing-group.h"
#include "xml/repr.h"
#include "enums.h"
#include "attributes.h"
#include "document.h"
#include "document-private.h"
#include "sp-item.h"
#include "style.h"
#include <2geom/transforms.h>
#include "sp-clippath.h"
struct SPClipPathView {
SPClipPathView *next;
unsigned int key;
Inkscape::DrawingItem *arenaitem;
Geom::OptRect bbox;
};
SPClipPathView *sp_clippath_view_new_prepend(SPClipPathView *list, unsigned int key, Inkscape::DrawingItem *arenaitem);
SPClipPathView *sp_clippath_view_list_remove(SPClipPathView *list, SPClipPathView *view);
SPObjectGroupClass * SPClipPathClass::static_parent_class = 0;
GType
SPClipPath::sp_clippath_get_type(void)
{
static GType type = 0;
if (!type) {
GTypeInfo info = {
sizeof(SPClipPathClass),
NULL, NULL,
(GClassInitFunc) SPClipPathClass::sp_clippath_class_init,
NULL, NULL,
sizeof(SPClipPath),
16,
(GInstanceInitFunc) SPClipPath::init,
NULL, /* value_table */
};
type = g_type_register_static(SP_TYPE_OBJECTGROUP, "SPClipPath", &info, (GTypeFlags)0);
}
return type;
}
void SPClipPathClass::sp_clippath_class_init(SPClipPathClass *klass)
{
SPObjectClass *sp_object_class = (SPObjectClass *) klass;
static_parent_class = (SPObjectGroupClass*)g_type_class_ref(SP_TYPE_OBJECTGROUP);
sp_object_class->build = SPClipPath::build;
sp_object_class->release = SPClipPath::release;
sp_object_class->set = SPClipPath::set;
sp_object_class->child_added = SPClipPath::childAdded;
sp_object_class->update = SPClipPath::update;
sp_object_class->modified = SPClipPath::modified;
sp_object_class->write = SPClipPath::write;
}
CClipPath::CClipPath(SPClipPath* clippath) : CObjectGroup(clippath) {
this->spclippath = clippath;
}
CClipPath::~CClipPath() {
}
void SPClipPath::init(SPClipPath *cp)
{
cp->cclippath = new CClipPath(cp);
cp->cobjectgroup = cp->cclippath;
cp->cobject = cp->cclippath;
cp->clipPathUnits_set = FALSE;
cp->clipPathUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
cp->display = NULL;
}
void CClipPath::onBuild(SPDocument* doc, Inkscape::XML::Node* repr) {
SPClipPath* object = this->spclippath;
CObjectGroup::onBuild(doc, repr);
object->readAttr( "style" );
object->readAttr( "clipPathUnits" );
/* Register ourselves */
doc->addResource("clipPath", object);
}
void SPClipPath::build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
{
((SPClipPath*)object)->cclippath->onBuild(document, repr);
}
void CClipPath::onRelease() {
SPClipPath* object = this->spclippath;
if (object->document) {
// Unregister ourselves
object->document->removeResource("clipPath", object);
}
SPClipPath *cp = SP_CLIPPATH(object);
while (cp->display) {
/* We simply unref and let item manage this in handler */
cp->display = sp_clippath_view_list_remove(cp->display, cp->display);
}
CObjectGroup::onRelease();
}
void SPClipPath::release(SPObject * object)
{
((SPClipPath*)object)->cclippath->onRelease();
}
void CClipPath::onSet(unsigned int key, const gchar* value) {
SPClipPath* object = this->spclippath;
SPClipPath *cp = SP_CLIPPATH(object);
switch (key) {
case SP_ATTR_CLIPPATHUNITS:
cp->clipPathUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
cp->clipPathUnits_set = FALSE;
if (value) {
if (!strcmp(value, "userSpaceOnUse")) {
cp->clipPathUnits_set = TRUE;
} else if (!strcmp(value, "objectBoundingBox")) {
cp->clipPathUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
cp->clipPathUnits_set = TRUE;
}
}
object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
break;
default:
if (SP_ATTRIBUTE_IS_CSS(key)) {
sp_style_read_from_object(object->style, object);
object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
} else {
CObjectGroup::onSet(key, value);
}
break;
}
}
void SPClipPath::set(SPObject *object, unsigned int key, gchar const *value)
{
((SPClipPath*)object)->cclippath->onSet(key, value);
}
void CClipPath::onChildAdded(Inkscape::XML::Node* child, Inkscape::XML::Node* ref) {
SPClipPath* object = this->spclippath;
/* Invoke SPObjectGroup implementation */
CObjectGroup::onChildAdded(child, ref);
/* Show new object */
SPObject *ochild = object->document->getObjectByRepr(child);
if (SP_IS_ITEM(ochild)) {
SPClipPath *cp = SP_CLIPPATH(object);
for (SPClipPathView *v = cp->display; v != NULL; v = v->next) {
Inkscape::DrawingItem *ac = SP_ITEM(ochild)->invoke_show(v->arenaitem->drawing(),
v->key,
SP_ITEM_REFERENCE_FLAGS);
if (ac) {
v->arenaitem->prependChild(ac);
}
}
}
}
void SPClipPath::childAdded(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
{
((SPClipPath*)object)->cclippath->onChildAdded(child, ref);
}
void CClipPath::onUpdate(SPCtx* ctx, unsigned int flags) {
SPClipPath* object = this->spclippath;
if (flags & SP_OBJECT_MODIFIED_FLAG) {
flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
}
flags &= SP_OBJECT_MODIFIED_CASCADE;
SPObjectGroup *og = SP_OBJECTGROUP(object);
GSList *l = NULL;
for ( SPObject *child = og->firstChild(); child; child = child->getNext()) {
g_object_ref(G_OBJECT(child));
l = g_slist_prepend(l, child);
}
l = g_slist_reverse(l);
while (l) {
SPObject *child = SP_OBJECT(l->data);
l = g_slist_remove(l, child);
if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
child->updateDisplay(ctx, flags);
}
g_object_unref(G_OBJECT(child));
}
SPClipPath *cp = SP_CLIPPATH(object);
for (SPClipPathView *v = cp->display; v != NULL; v = v->next) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && v->bbox) {
Geom::Affine t = Geom::Scale(v->bbox->dimensions());
t.setTranslation(v->bbox->min());
g->setChildTransform(t);
} else {
g->setChildTransform(Geom::identity());
}
}
}
void SPClipPath::update(SPObject *object, SPCtx *ctx, guint flags)
{
((SPClipPath*)object)->cclippath->onUpdate(ctx, flags);
}
void CClipPath::onModified(unsigned int flags) {
SPClipPath* object = this->spclippath;
if (flags & SP_OBJECT_MODIFIED_FLAG) {
flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
}
flags &= SP_OBJECT_MODIFIED_CASCADE;
SPObjectGroup *og = SP_OBJECTGROUP(object);
GSList *l = NULL;
for (SPObject *child = og->firstChild(); child; child = child->getNext()) {
g_object_ref(G_OBJECT(child));
l = g_slist_prepend(l, child);
}
l = g_slist_reverse(l);
while (l) {
SPObject *child = SP_OBJECT(l->data);
l = g_slist_remove(l, child);
if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
child->emitModified(flags);
}
g_object_unref(G_OBJECT(child));
}
}
void SPClipPath::modified(SPObject *object, guint flags)
{
((SPClipPath*)object)->cclippath->onModified(flags);
}
Inkscape::XML::Node* CClipPath::onWrite(Inkscape::XML::Document* xml_doc, Inkscape::XML::Node* repr, guint flags) {
if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
repr = xml_doc->createElement("svg:clipPath");
}
CObjectGroup::onWrite(xml_doc, repr, flags);
return repr;
}
Inkscape::XML::Node *SPClipPath::write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
{
return ((SPClipPath*)object)->cclippath->onWrite(xml_doc, repr, flags);
}
// CPPIFY: These methods are virtual in SPItem. So wouldn't it be better to derive SPClipPath from SPItem?
Inkscape::DrawingItem *SPClipPath::show(Inkscape::Drawing &drawing, unsigned int key)
{
Inkscape::DrawingGroup *ai = new Inkscape::DrawingGroup(drawing);
display = sp_clippath_view_new_prepend(display, key, ai);
for ( SPObject *child = firstChild() ; child ; child = child->getNext() ) {
if (SP_IS_ITEM(child)) {
Inkscape::DrawingItem *ac = SP_ITEM(child)->invoke_show(drawing, key, SP_ITEM_REFERENCE_FLAGS);
if (ac) {
/* The order is not important in clippath */
ai->appendChild(ac);
}
}
}
if (clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && display->bbox) {
Geom::Affine t = Geom::Scale(display->bbox->dimensions());
t.setTranslation(display->bbox->min());
ai->setChildTransform(t);
}
ai->setStyle(this->style);
return ai;
}
void SPClipPath::hide(unsigned int key)
{
for ( SPObject *child = firstChild() ; child; child = child->getNext() ) {
if (SP_IS_ITEM(child)) {
SP_ITEM(child)->invoke_hide(key);
}
}
for (SPClipPathView *v = display; v != NULL; v = v->next) {
if (v->key == key) {
/* We simply unref and let item to manage this in handler */
display = sp_clippath_view_list_remove(display, v);
return;
}
}
g_assert_not_reached();
}
void SPClipPath::setBBox(unsigned int key, Geom::OptRect const &bbox)
{
for (SPClipPathView *v = display; v != NULL; v = v->next) {
if (v->key == key) {
v->bbox = bbox;
break;
}
}
}
Geom::OptRect SPClipPath::geometricBounds(Geom::Affine const &transform)
{
SPObject *i = 0;
Geom::OptRect bbox;
for (i = firstChild(); i; i = i->getNext()) {
if (!SP_IS_ITEM(i)) continue;
Geom::OptRect tmp = SP_ITEM(i)->geometricBounds(Geom::Affine(SP_ITEM(i)->transform) * transform);
bbox.unionWith(tmp);
}
return bbox;
}
/* ClipPath views */
SPClipPathView *
sp_clippath_view_new_prepend(SPClipPathView *list, unsigned int key, Inkscape::DrawingItem *arenaitem)
{
SPClipPathView *new_path_view = g_new(SPClipPathView, 1);
new_path_view->next = list;
new_path_view->key = key;
new_path_view->arenaitem = arenaitem;
new_path_view->bbox = Geom::OptRect();
return new_path_view;
}
SPClipPathView *
sp_clippath_view_list_remove(SPClipPathView *list, SPClipPathView *view)
{
if (view == list) {
list = list->next;
} else {
SPClipPathView *prev;
prev = list;
while (prev->next != view) prev = prev->next;
prev->next = view->next;
}
delete view->arenaitem;
g_free(view);
return list;
}
// Create a mask element (using passed elements), add it to <defs>
const gchar *SPClipPath::create (GSList *reprs, SPDocument *document, Geom::Affine const* applyTransform)
{
Inkscape::XML::Node *defsrepr = document->getDefs()->getRepr();
Inkscape::XML::Document *xml_doc = document->getReprDoc();
Inkscape::XML::Node *repr = xml_doc->createElement("svg:clipPath");
repr->setAttribute("clipPathUnits", "userSpaceOnUse");
defsrepr->appendChild(repr);
const gchar *id = repr->attribute("id");
SPObject *clip_path_object = document->getObjectById(id);
for (GSList *it = reprs; it != NULL; it = it->next) {
Inkscape::XML::Node *node = (Inkscape::XML::Node *)(it->data);
SPItem *item = SP_ITEM(clip_path_object->appendChildRepr(node));
if (NULL != applyTransform) {
Geom::Affine transform (item->transform);
transform *= (*applyTransform);
item->doWriteTransform(item->getRepr(), transform);
}
}
Inkscape::GC::release(repr);
return id;
}
/*
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 :