diff options
Diffstat (limited to 'src/selection-chemistry.cpp')
| -rw-r--r-- | src/selection-chemistry.cpp | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/selection-chemistry.cpp b/src/selection-chemistry.cpp index a350dd7a7..d2f6d692a 100644 --- a/src/selection-chemistry.cpp +++ b/src/selection-chemistry.cpp @@ -3661,6 +3661,118 @@ void sp_selection_create_bitmap_copy(SPDesktop *desktop) g_free(filepath); } +/* Creates a mask or clipPath from selection. + * What is a clip group? + * A clip group is a tangled mess of XML that allows an object inside a group + * to clip the entire group using a few <use>s and generally irritating me. + */ + +void sp_selection_set_clipgroup(SPDesktop *desktop) +{ + if (desktop == NULL) { + return; + } + SPDocument* doc = sp_desktop_document(desktop); + Inkscape::XML::Document *xml_doc = doc->getReprDoc(); + + Inkscape::Selection *selection = sp_desktop_selection(desktop); + if (selection->isEmpty()) { + desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to create clippath or mask from.")); + return; + } + + GSList const *l = const_cast<GSList *>(selection->reprList()); + + GSList *p = g_slist_copy(const_cast<GSList *>(l)); + + p = g_slist_sort(p, (GCompareFunc) sp_repr_compare_position); + + selection->clear(); + + gint topmost = (static_cast<Inkscape::XML::Node *>(g_slist_last(p)->data))->position(); + Inkscape::XML::Node *topmost_parent = (static_cast<Inkscape::XML::Node *>(g_slist_last(p)->data))->parent(); + + Inkscape::XML::Node *inner = xml_doc->createElement("svg:g"); + inner->setAttribute("inkscape:label", "Clip"); + + while (p) { + Inkscape::XML::Node *current = static_cast<Inkscape::XML::Node *>(p->data); + + if (current->parent() == topmost_parent) { + Inkscape::XML::Node *spnew = current->duplicate(xml_doc); + sp_repr_unparent(current); + inner->appendChild(spnew); + Inkscape::GC::release(spnew); + topmost --; // only reduce count for those items deleted from topmost_parent + } else { // move it to topmost_parent first + GSList *temp_clip = NULL; + + // At this point, current may already have no item, due to its being a clone whose original is already moved away + // So we copy it artificially calculating the transform from its repr->attr("transform") and the parent transform + gchar const *t_str = current->attribute("transform"); + Geom::Affine item_t(Geom::identity()); + if (t_str) + sp_svg_transform_read(t_str, &item_t); + item_t *= SP_ITEM(doc->getObjectByRepr(current->parent()))->i2doc_affine(); + // FIXME: when moving both clone and original from a transformed group (either by + // grouping into another parent, or by cut/paste) the transform from the original's + // parent becomes embedded into original itself, and this affects its clones. Fix + // this by remembering the transform diffs we write to each item into an array and + // then, if this is clone, looking up its original in that array and pre-multiplying + // it by the inverse of that original's transform diff. + + sp_selection_copy_one(current, item_t, &temp_clip, xml_doc); + sp_repr_unparent(current); + + // paste into topmost_parent (temporarily) + GSList *copied = sp_selection_paste_impl(doc, doc->getObjectByRepr(topmost_parent), &temp_clip); + if (temp_clip) g_slist_free(temp_clip); + if (copied) { // if success, + // take pasted object (now in topmost_parent) + Inkscape::XML::Node *in_topmost = static_cast<Inkscape::XML::Node *>(copied->data); + // make a copy + Inkscape::XML::Node *spnew = in_topmost->duplicate(xml_doc); + // remove pasted + sp_repr_unparent(in_topmost); + // put its copy into group + inner->appendChild(spnew); + Inkscape::GC::release(spnew); + g_slist_free(copied); + } + } + p = g_slist_remove(p, current); + } + + Inkscape::XML::Node *outer = xml_doc->createElement("svg:g"); + outer->appendChild(inner); + topmost_parent->appendChild(outer); + outer->setPosition(topmost + 1); + + Inkscape::XML::Node *clone = xml_doc->createElement("svg:use"); + clone->setAttribute("x", "0", false); + clone->setAttribute("y", "0", false); + clone->setAttribute("xlink:href", g_strdup_printf("#%s", inner->attribute("id")), false); + + clone->setAttribute("inkscape:transform-center-x", inner->attribute("inkscape:transform-center-x"), false); + clone->setAttribute("inkscape:transform-center-y", inner->attribute("inkscape:transform-center-y"), false); + + const Geom::Affine maskTransform(Geom::Affine::identity()); + GSList *templist = NULL; + + templist = g_slist_append(templist, clone); + // add the new clone to the top of the original's parent + gchar const *mask_id = SPClipPath::create(templist, doc, &maskTransform); + + g_slist_free(templist); + + outer->setAttribute("clip-path", g_strdup_printf("url(#%s)", mask_id)); + + Inkscape::GC::release(clone); + + selection->set(outer); + DocumentUndo::done(doc, SP_VERB_OBJECT_SET_CLIPPATH, _("Create Clip Group")); +} + /** * Creates a mask or clipPath from selection. * Two different modes: |