sp-clippath.cpp revision 4d5fcd13b3b8222d36788c32450bac85bcb1ce77
/*
* 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/nr-arena.h"
#include "display/nr-arena-group.h"
#include "xml/repr.h"
#include "enums.h"
#include "attributes.h"
#include "document.h"
#include "document-private.h"
#include "sp-item.h"
#include <2geom/transforms.h>
#include "sp-clippath.h"
struct SPClipPathView {
SPClipPathView *next;
unsigned int key;
NRArenaItem *arenaitem;
NRRect bbox;
};
SPClipPathView *sp_clippath_view_new_prepend(SPClipPathView *list, unsigned int key, NRArenaItem *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;
}
void SPClipPath::init(SPClipPath *cp)
{
cp->clipPathUnits_set = FALSE;
cp->clipPathUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
cp->display = NULL;
}
void SPClipPath::build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
{
if (((SPObjectClass *) SPClipPathClass::static_parent_class)->build)
((SPObjectClass *) SPClipPathClass::static_parent_class)->build(object, document, repr);
object->readAttr( "style" );
object->readAttr( "clipPathUnits" );
/* Register ourselves */
document->addResource("clipPath", object);
}
void SPClipPath::release(SPObject * object)
{
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);
}
if (((SPObjectClass *) (SPClipPathClass::static_parent_class))->release) {
((SPObjectClass *) SPClipPathClass::static_parent_class)->release(object);
}
}
void SPClipPath::set(SPObject *object, unsigned int key, gchar const *value)
{
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 {
if (((SPObjectClass *) SPClipPathClass::static_parent_class)->set) {
((SPObjectClass *) SPClipPathClass::static_parent_class)->set(object, key, value);
}
}
break;
}
}
void SPClipPath::childAdded(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
{
/* Invoke SPObjectGroup implementation */
((SPObjectClass *) (SPClipPathClass::static_parent_class))->child_added(object, 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) {
NRArenaItem *ac = SP_ITEM(ochild)->invoke_show( NR_ARENA_ITEM_ARENA(v->arenaitem),
v->key,
SP_ITEM_REFERENCE_FLAGS);
if (ac) {
nr_arena_item_add_child(v->arenaitem, ac, NULL);
}
}
}
}
void SPClipPath::update(SPObject *object, SPCtx *ctx, guint flags)
{
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) {
if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX) {
Geom::Affine t(Geom::Scale(v->bbox.x1 - v->bbox.x0, v->bbox.y1 - v->bbox.y0));
t[4] = v->bbox.x0;
t[5] = v->bbox.y0;
nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->arenaitem), &t);
} else {
nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->arenaitem), NULL);
}
}
}
void SPClipPath::modified(SPObject *object, guint flags)
{
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));
}
}
Inkscape::XML::Node *SPClipPath::write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
{
if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
repr = xml_doc->createElement("svg:clipPath");
}
if (((SPObjectClass *) (SPClipPathClass::static_parent_class))->write) {
((SPObjectClass *) (SPClipPathClass::static_parent_class))->write(object, xml_doc, repr, flags);
}
return repr;
}
NRArenaItem *SPClipPath::show(NRArena *arena, unsigned int key)
{
g_return_val_if_fail(arena != NULL, NULL);
g_return_val_if_fail(NR_IS_ARENA(arena), NULL);
NRArenaItem *ai = NRArenaGroup::create(arena);
display = sp_clippath_view_new_prepend(display, key, ai);
for ( SPObject *child = firstChild() ; child ; child = child->getNext() ) {
if (SP_IS_ITEM(child)) {
NRArenaItem *ac = SP_ITEM(child)->invoke_show(arena, key, SP_ITEM_REFERENCE_FLAGS);
if (ac) {
/* The order is not important in clippath */
nr_arena_item_add_child(ai, ac, NULL);
}
}
}
if (clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX) {
Geom::Affine t(Geom::Scale(display->bbox.x1 - display->bbox.x0, display->bbox.y1 - display->bbox.y0));
t[4] = display->bbox.x0;
t[5] = display->bbox.y0;
nr_arena_group_set_child_transform(NR_ARENA_GROUP(ai), &t);
}
nr_arena_group_set_style(NR_ARENA_GROUP(ai), 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, NRRect *bbox)
{
for (SPClipPathView *v = display; v != NULL; v = v->next) {
if (v->key == key) {
if (!Geom::are_near(v->bbox.x0, bbox->x0) ||
!Geom::are_near(v->bbox.y0, bbox->y0) ||
!Geom::are_near(v->bbox.x1, bbox->x1) ||
!Geom::are_near(v->bbox.y1, bbox->y1)) {
v->bbox = *bbox;
}
break;
}
}
}
void SPClipPath::getBBox(NRRect *bbox, Geom::Affine const &transform, unsigned const /*flags*/)
{
SPObject *i = 0;
for (i = firstChild(); i && !SP_IS_ITEM(i); i = i->getNext()) {
}
if (!i) {
return;
}
SP_ITEM(i)->invoke_bbox_full( bbox, Geom::Affine(SP_ITEM(i)->transform) * transform, SPItem::GEOMETRIC_BBOX, FALSE);
SPObject *i_start = i;
while (i != NULL) {
if (i != i_start) {
NRRect i_box;
SP_ITEM(i)->invoke_bbox_full( &i_box, Geom::Affine(SP_ITEM(i)->transform) * transform, SPItem::GEOMETRIC_BBOX, FALSE);
nr_rect_d_union (bbox, bbox, &i_box);
}
i = i->getNext();
for (; i && !SP_IS_ITEM(i); i = i->getNext()){};
}
}
/* ClipPath views */
SPClipPathView *
sp_clippath_view_new_prepend(SPClipPathView *list, unsigned int key, NRArenaItem *arenaitem)
{
SPClipPathView *new_path_view = g_new(SPClipPathView, 1);
new_path_view->next = list;
new_path_view->key = key;
new_path_view->arenaitem = nr_arena_item_ref(arenaitem);
new_path_view->bbox.x0 = new_path_view->bbox.x1 = 0.0;
new_path_view->bbox.y0 = new_path_view->bbox.y1 = 0.0;
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;
}
nr_arena_item_unref(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 :