1 #define __SP_CLIPPATH_C__
3 /*
4 * SVG <clipPath> implementation
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 *
9 * Copyright (C) 2001-2002 authors
10 * Copyright (C) 2001 Ximian, Inc.
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #include <cstring>
16 #include <string>
18 #include "display/nr-arena.h"
19 #include "display/nr-arena-group.h"
20 #include "xml/repr.h"
22 #include "enums.h"
23 #include "attributes.h"
24 #include "document.h"
25 #include "document-private.h"
26 #include "sp-item.h"
28 #include "libnr/nr-matrix-ops.h"
29 #include <2geom/transforms.h>
31 #include "sp-clippath.h"
33 struct SPClipPathView {
34 SPClipPathView *next;
35 unsigned int key;
36 NRArenaItem *arenaitem;
37 NRRect bbox;
38 };
40 static void sp_clippath_class_init(SPClipPathClass *klass);
41 static void sp_clippath_init(SPClipPath *clippath);
43 static void sp_clippath_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
44 static void sp_clippath_release(SPObject * object);
45 static void sp_clippath_set(SPObject *object, unsigned int key, gchar const *value);
46 static void sp_clippath_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
47 static void sp_clippath_update(SPObject *object, SPCtx *ctx, guint flags);
48 static void sp_clippath_modified(SPObject *object, guint flags);
49 static Inkscape::XML::Node *sp_clippath_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
51 SPClipPathView *sp_clippath_view_new_prepend(SPClipPathView *list, unsigned int key, NRArenaItem *arenaitem);
52 SPClipPathView *sp_clippath_view_list_remove(SPClipPathView *list, SPClipPathView *view);
54 static SPObjectGroupClass *parent_class;
56 GType
57 sp_clippath_get_type(void)
58 {
59 static GType type = 0;
60 if (!type) {
61 GTypeInfo info = {
62 sizeof(SPClipPathClass),
63 NULL, NULL,
64 (GClassInitFunc) sp_clippath_class_init,
65 NULL, NULL,
66 sizeof(SPClipPath),
67 16,
68 (GInstanceInitFunc) sp_clippath_init,
69 NULL, /* value_table */
70 };
71 type = g_type_register_static(SP_TYPE_OBJECTGROUP, "SPClipPath", &info, (GTypeFlags)0);
72 }
73 return type;
74 }
76 static void
77 sp_clippath_class_init(SPClipPathClass *klass)
78 {
79 SPObjectClass *sp_object_class = (SPObjectClass *) klass;
81 parent_class = (SPObjectGroupClass*)g_type_class_ref(SP_TYPE_OBJECTGROUP);
83 sp_object_class->build = sp_clippath_build;
84 sp_object_class->release = sp_clippath_release;
85 sp_object_class->set = sp_clippath_set;
86 sp_object_class->child_added = sp_clippath_child_added;
87 sp_object_class->update = sp_clippath_update;
88 sp_object_class->modified = sp_clippath_modified;
89 sp_object_class->write = sp_clippath_write;
90 }
92 static void
93 sp_clippath_init(SPClipPath *cp)
94 {
95 cp->clipPathUnits_set = FALSE;
96 cp->clipPathUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
98 cp->display = NULL;
99 }
101 static void
102 sp_clippath_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
103 {
104 if (((SPObjectClass *) parent_class)->build)
105 ((SPObjectClass *) parent_class)->build(object, document, repr);
107 sp_object_read_attr(object, "clipPathUnits");
109 /* Register ourselves */
110 sp_document_add_resource(document, "clipPath", object);
111 }
113 static void
114 sp_clippath_release(SPObject * object)
115 {
116 if (SP_OBJECT_DOCUMENT(object)) {
117 /* Unregister ourselves */
118 sp_document_remove_resource(SP_OBJECT_DOCUMENT(object), "clipPath", object);
119 }
121 SPClipPath *cp = SP_CLIPPATH(object);
122 while (cp->display) {
123 /* We simply unref and let item manage this in handler */
124 cp->display = sp_clippath_view_list_remove(cp->display, cp->display);
125 }
127 if (((SPObjectClass *) (parent_class))->release) {
128 ((SPObjectClass *) parent_class)->release(object);
129 }
130 }
132 static void
133 sp_clippath_set(SPObject *object, unsigned int key, gchar const *value)
134 {
135 SPClipPath *cp = SP_CLIPPATH(object);
137 switch (key) {
138 case SP_ATTR_CLIPPATHUNITS:
139 cp->clipPathUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
140 cp->clipPathUnits_set = FALSE;
141 if (value) {
142 if (!strcmp(value, "userSpaceOnUse")) {
143 cp->clipPathUnits_set = TRUE;
144 } else if (!strcmp(value, "objectBoundingBox")) {
145 cp->clipPathUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
146 cp->clipPathUnits_set = TRUE;
147 }
148 }
149 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
150 break;
151 default:
152 if (((SPObjectClass *) parent_class)->set)
153 ((SPObjectClass *) parent_class)->set(object, key, value);
154 break;
155 }
156 }
158 static void
159 sp_clippath_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
160 {
161 /* Invoke SPObjectGroup implementation */
162 ((SPObjectClass *) (parent_class))->child_added(object, child, ref);
164 /* Show new object */
165 SPObject *ochild = SP_OBJECT_DOCUMENT(object)->getObjectByRepr(child);
166 if (SP_IS_ITEM(ochild)) {
167 SPClipPath *cp = SP_CLIPPATH(object);
168 for (SPClipPathView *v = cp->display; v != NULL; v = v->next) {
169 NRArenaItem *ac = SP_ITEM(ochild)->invoke_show( NR_ARENA_ITEM_ARENA(v->arenaitem),
170 v->key,
171 SP_ITEM_REFERENCE_FLAGS);
172 if (ac) {
173 nr_arena_item_add_child(v->arenaitem, ac, NULL);
174 }
175 }
176 }
177 }
179 static void
180 sp_clippath_update(SPObject *object, SPCtx *ctx, guint flags)
181 {
182 if (flags & SP_OBJECT_MODIFIED_FLAG) {
183 flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
184 }
186 flags &= SP_OBJECT_MODIFIED_CASCADE;
188 SPObjectGroup *og = SP_OBJECTGROUP(object);
189 GSList *l = NULL;
190 for (SPObject *child = sp_object_first_child(SP_OBJECT(og)); child != NULL; child = SP_OBJECT_NEXT(child)) {
191 g_object_ref(G_OBJECT(child));
192 l = g_slist_prepend(l, child);
193 }
194 l = g_slist_reverse(l);
195 while (l) {
196 SPObject *child = SP_OBJECT(l->data);
197 l = g_slist_remove(l, child);
198 if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
199 child->updateDisplay(ctx, flags);
200 }
201 g_object_unref(G_OBJECT(child));
202 }
204 SPClipPath *cp = SP_CLIPPATH(object);
205 for (SPClipPathView *v = cp->display; v != NULL; v = v->next) {
206 if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX) {
207 Geom::Matrix t(Geom::Scale(v->bbox.x1 - v->bbox.x0, v->bbox.y1 - v->bbox.y0));
208 t[4] = v->bbox.x0;
209 t[5] = v->bbox.y0;
210 nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->arenaitem), &t);
211 } else {
212 nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->arenaitem), NULL);
213 }
214 }
215 }
217 static void
218 sp_clippath_modified(SPObject *object, guint flags)
219 {
220 if (flags & SP_OBJECT_MODIFIED_FLAG) {
221 flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
222 }
224 flags &= SP_OBJECT_MODIFIED_CASCADE;
226 SPObjectGroup *og = SP_OBJECTGROUP(object);
227 GSList *l = NULL;
228 for (SPObject *child = sp_object_first_child(SP_OBJECT(og)); child != NULL; child = SP_OBJECT_NEXT(child)) {
229 g_object_ref(G_OBJECT(child));
230 l = g_slist_prepend(l, child);
231 }
232 l = g_slist_reverse(l);
233 while (l) {
234 SPObject *child = SP_OBJECT(l->data);
235 l = g_slist_remove(l, child);
236 if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
237 child->emitModified(flags);
238 }
239 g_object_unref(G_OBJECT(child));
240 }
241 }
243 static Inkscape::XML::Node *
244 sp_clippath_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
245 {
246 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
247 repr = xml_doc->createElement("svg:clipPath");
248 }
250 if (((SPObjectClass *) (parent_class))->write)
251 ((SPObjectClass *) (parent_class))->write(object, xml_doc, repr, flags);
253 return repr;
254 }
256 NRArenaItem *
257 sp_clippath_show(SPClipPath *cp, NRArena *arena, unsigned int key)
258 {
259 g_return_val_if_fail(cp != NULL, NULL);
260 g_return_val_if_fail(SP_IS_CLIPPATH(cp), NULL);
261 g_return_val_if_fail(arena != NULL, NULL);
262 g_return_val_if_fail(NR_IS_ARENA(arena), NULL);
264 NRArenaItem *ai = NRArenaGroup::create(arena);
265 cp->display = sp_clippath_view_new_prepend(cp->display, key, ai);
267 for (SPObject *child = sp_object_first_child(SP_OBJECT(cp)) ; child != NULL; child = SP_OBJECT_NEXT(child)) {
268 if (SP_IS_ITEM(child)) {
269 NRArenaItem *ac = SP_ITEM(child)->invoke_show(arena, key, SP_ITEM_REFERENCE_FLAGS);
270 if (ac) {
271 /* The order is not important in clippath */
272 nr_arena_item_add_child(ai, ac, NULL);
273 }
274 }
275 }
277 if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX) {
278 Geom::Matrix t(Geom::Scale(cp->display->bbox.x1 - cp->display->bbox.x0, cp->display->bbox.y1 - cp->display->bbox.y0));
279 t[4] = cp->display->bbox.x0;
280 t[5] = cp->display->bbox.y0;
281 nr_arena_group_set_child_transform(NR_ARENA_GROUP(ai), &t);
282 }
284 return ai;
285 }
287 void
288 sp_clippath_hide(SPClipPath *cp, unsigned int key)
289 {
290 g_return_if_fail(cp != NULL);
291 g_return_if_fail(SP_IS_CLIPPATH(cp));
293 for (SPObject *child = sp_object_first_child(SP_OBJECT(cp)) ; child != NULL; child = SP_OBJECT_NEXT(child)) {
294 if (SP_IS_ITEM(child)) {
295 SP_ITEM(child)->invoke_hide(key);
296 }
297 }
299 for (SPClipPathView *v = cp->display; v != NULL; v = v->next) {
300 if (v->key == key) {
301 /* We simply unref and let item to manage this in handler */
302 cp->display = sp_clippath_view_list_remove(cp->display, v);
303 return;
304 }
305 }
307 g_assert_not_reached();
308 }
310 void
311 sp_clippath_set_bbox(SPClipPath *cp, unsigned int key, NRRect *bbox)
312 {
313 for (SPClipPathView *v = cp->display; v != NULL; v = v->next) {
314 if (v->key == key) {
315 if (!NR_DF_TEST_CLOSE(v->bbox.x0, bbox->x0, NR_EPSILON) ||
316 !NR_DF_TEST_CLOSE(v->bbox.y0, bbox->y0, NR_EPSILON) ||
317 !NR_DF_TEST_CLOSE(v->bbox.x1, bbox->x1, NR_EPSILON) ||
318 !NR_DF_TEST_CLOSE(v->bbox.y1, bbox->y1, NR_EPSILON)) {
319 v->bbox = *bbox;
320 }
321 break;
322 }
323 }
324 }
326 void
327 sp_clippath_get_bbox(SPClipPath *cp, NRRect *bbox, Geom::Matrix const &transform, unsigned const /*flags*/)
328 {
329 SPObject *i;
330 for (i = sp_object_first_child(SP_OBJECT(cp)); i && !SP_IS_ITEM(i); i = SP_OBJECT_NEXT(i)){};
331 if (!i) return;
333 SP_ITEM(i)->invoke_bbox_full( bbox, Geom::Matrix(SP_ITEM(i)->transform) * transform, SPItem::GEOMETRIC_BBOX, FALSE);
334 SPObject *i_start = i;
336 while (i != NULL) {
337 if (i != i_start) {
338 NRRect i_box;
339 SP_ITEM(i)->invoke_bbox_full( &i_box, Geom::Matrix(SP_ITEM(i)->transform) * transform, SPItem::GEOMETRIC_BBOX, FALSE);
340 nr_rect_d_union (bbox, bbox, &i_box);
341 }
342 i = SP_OBJECT_NEXT(i);
343 for (; i && !SP_IS_ITEM(i); i = SP_OBJECT_NEXT(i)){};
344 }
345 }
347 /* ClipPath views */
349 SPClipPathView *
350 sp_clippath_view_new_prepend(SPClipPathView *list, unsigned int key, NRArenaItem *arenaitem)
351 {
352 SPClipPathView *new_path_view = g_new(SPClipPathView, 1);
354 new_path_view->next = list;
355 new_path_view->key = key;
356 new_path_view->arenaitem = nr_arena_item_ref(arenaitem);
357 new_path_view->bbox.x0 = new_path_view->bbox.x1 = 0.0;
358 new_path_view->bbox.y0 = new_path_view->bbox.y1 = 0.0;
360 return new_path_view;
361 }
363 SPClipPathView *
364 sp_clippath_view_list_remove(SPClipPathView *list, SPClipPathView *view)
365 {
366 if (view == list) {
367 list = list->next;
368 } else {
369 SPClipPathView *prev;
370 prev = list;
371 while (prev->next != view) prev = prev->next;
372 prev->next = view->next;
373 }
375 nr_arena_item_unref(view->arenaitem);
376 g_free(view);
378 return list;
379 }
381 // Create a mask element (using passed elements), add it to <defs>
382 const gchar *
383 sp_clippath_create (GSList *reprs, SPDocument *document, Geom::Matrix const* applyTransform)
384 {
385 Inkscape::XML::Node *defsrepr = SP_OBJECT_REPR (SP_DOCUMENT_DEFS (document));
387 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
388 Inkscape::XML::Node *repr = xml_doc->createElement("svg:clipPath");
389 repr->setAttribute("clipPathUnits", "userSpaceOnUse");
391 defsrepr->appendChild(repr);
392 const gchar *id = repr->attribute("id");
393 SPObject *clip_path_object = document->getObjectById(id);
395 for (GSList *it = reprs; it != NULL; it = it->next) {
396 Inkscape::XML::Node *node = (Inkscape::XML::Node *)(it->data);
397 SPItem *item = SP_ITEM(clip_path_object->appendChildRepr(node));
399 if (NULL != applyTransform) {
400 Geom::Matrix transform (item->transform);
401 transform *= (*applyTransform);
402 item->doWriteTransform(SP_OBJECT_REPR(item), transform);
403 }
404 }
406 Inkscape::GC::release(repr);
407 return id;
408 }
410 /*
411 Local Variables:
412 mode:c++
413 c-file-style:"stroustrup"
414 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
415 indent-tabs-mode:nil
416 fill-column:99
417 End:
418 */
419 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :