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Diffstat (limited to '')
| -rw-r--r-- | src/live_effects/lpe-powerclip.cpp | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/src/live_effects/lpe-powerclip.cpp b/src/live_effects/lpe-powerclip.cpp new file mode 100644 index 0000000..6b804bb --- /dev/null +++ b/src/live_effects/lpe-powerclip.cpp @@ -0,0 +1,336 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ +#include "live_effects/lpe-powerclip.h" +#include "display/curve.h" +#include "live_effects/lpeobject-reference.h" +#include "live_effects/lpeobject.h" +#include "object/sp-clippath.h" +#include "object/sp-defs.h" +#include "object/sp-item-group.h" +#include "object/sp-item.h" +#include "object/sp-path.h" +#include "object/sp-shape.h" +#include "object/sp-use.h" +#include "style.h" +#include "svg/svg.h" + +#include <2geom/intersection-graph.h> +#include <2geom/path-intersection.h> +// TODO due to internal breakage in glibmm headers, this must be last: +#include <glibmm/i18n.h> + +namespace Inkscape { +namespace LivePathEffect { + +LPEPowerClip::LPEPowerClip(LivePathEffectObject *lpeobject) + : Effect(lpeobject) + , hide_clip(_("Hide clip"), _("Hide clip"), "hide_clip", &wr, this, false) + , inverse(_("Inverse clip"), _("Inverse clip"), "inverse", &wr, this, true) + , flatten(_("Flatten clip"), _("Flatten clip, see fill rule once convert to paths"), "flatten", &wr, this, false) + , message( + _("Info Box"), _("Important messages"), "message", &wr, this, + _("Use fill-rule evenodd on <b>fill and stroke</b> dialog if no flatten result after convert clip to paths.")) +{ + registerParameter(&inverse); + registerParameter(&flatten); + registerParameter(&hide_clip); + registerParameter(&message); + message.param_set_min_height(55); + _updating = false; + _legacy = false; + // legazy fix between 0.92.4 launch and 1.0beta1 + if (this->getRepr()->attribute("is_inverse")) { + this->getRepr()->removeAttribute("is_inverse"); + _legacy = true; + } +} + +LPEPowerClip::~LPEPowerClip() = default; + +Geom::Path sp_bbox_without_clip(SPLPEItem *lpeitem) +{ + Geom::OptRect bbox = lpeitem->visualBounds(Geom::identity(), true, false, true); + if (bbox) { + (*bbox).expandBy(5); + return Geom::Path(*bbox); + } + return Geom::Path(); +} + +Geom::PathVector sp_get_recursive_pathvector(SPLPEItem *item, Geom::PathVector res, bool dir, bool inverse) +{ + SPGroup *group = dynamic_cast<SPGroup *>(item); + if (group) { + std::vector<SPItem *> item_list = sp_item_group_item_list(group); + for (auto child : item_list) { + if (child) { + SPLPEItem *childitem = dynamic_cast<SPLPEItem *>(child); + if (childitem) { + res = sp_get_recursive_pathvector(childitem, res, dir, inverse); + } + } + } + } + SPShape *shape = dynamic_cast<SPShape *>(item); + if (shape && shape->curve()) { + for (auto path : shape->curve()->get_pathvector()) { + if (!path.empty()) { + bool pathdir = Geom::path_direction(path); + if (pathdir == dir && inverse) { + path = path.reversed(); + } + res.push_back(path); + } + } + } + return res; +} + +Geom::PathVector LPEPowerClip::getClipPathvector() +{ + Geom::PathVector res; + Geom::PathVector res_hlp; + if (!sp_lpe_item) { + return res; + } + + SPObject *clip_path = sp_lpe_item->getClipObject(); + if (clip_path) { + std::vector<SPObject*> clip_path_list = clip_path->childList(true); + clip_path_list.pop_back(); + if (clip_path_list.size()) { + for (auto clip : clip_path_list) { + SPLPEItem *childitem = dynamic_cast<SPLPEItem *>(clip); + if (childitem) { + res_hlp = sp_get_recursive_pathvector(childitem, res_hlp, false, inverse); + if (is_load && _legacy) { + childitem->doWriteTransform(Geom::Translate(0, -999999)); + } + if (!childitem->style || !childitem->style->display.set || + childitem->style->display.value != SP_CSS_DISPLAY_NONE) { + childitem->style->display.set = TRUE; + childitem->style->display.value = SP_CSS_DISPLAY_NONE; + childitem->updateRepr(SP_OBJECT_WRITE_NO_CHILDREN | SP_OBJECT_WRITE_EXT); + } + } + } + if (is_load && _legacy) { + res_hlp *= Geom::Translate(0, -999999); + _legacy = false; + } + } + } + Geom::Path bbox = sp_bbox_without_clip(sp_lpe_item); + if (hide_clip) { + return bbox; + } + if (inverse && isVisible()) { + res.push_back(bbox); + } + for (auto path : res_hlp) { + res.push_back(path); + } + return res; +} + +void LPEPowerClip::add() +{ + SPDocument *document = getSPDoc(); + if (!document || !sp_lpe_item) { + return; + } + SPObject *clip_path = sp_lpe_item->getClipObject(); + SPObject *elemref = NULL; + if (clip_path) { + Inkscape::XML::Document *xml_doc = document->getReprDoc(); + Inkscape::XML::Node *parent = clip_path->getRepr(); + SPLPEItem *childitem = dynamic_cast<SPLPEItem *>(clip_path->childList(true).back()); + if (childitem) { + if (const gchar *powerclip = childitem->getRepr()->attribute("class")) { + if (!strcmp(powerclip, "powerclip")) { + Glib::ustring newclip = Glib::ustring("clipath_") + getId(); + Glib::ustring uri = Glib::ustring("url(#") + newclip + Glib::ustring(")"); + parent = clip_path->getRepr()->duplicate(xml_doc); + parent->setAttribute("id", newclip); + clip_path = document->getDefs()->appendChildRepr(parent); + Inkscape::GC::release(parent); + sp_lpe_item->setAttribute("clip-path", uri); + SPLPEItem *childitemdel = dynamic_cast<SPLPEItem *>(clip_path->childList(true).back()); + if (childitemdel) { + childitemdel->setAttribute("id", getId()); + return; + } + } + } + } + Inkscape::XML::Node *clip_path_node = xml_doc->createElement("svg:path"); + parent->appendChild(clip_path_node); + Inkscape::GC::release(clip_path_node); + elemref = document->getObjectByRepr(clip_path_node); + if (elemref) { + if (childitem) { + elemref->setAttribute("style", childitem->getAttribute("style")); + } else { + elemref->setAttribute("style", "fill-rule:evenodd"); + } + elemref->setAttribute("class", "powerclip"); + elemref->setAttribute("id", getId()); + elemref->setAttribute("d", sp_svg_write_path(getClipPathvector())); + } else { + sp_lpe_item->removeCurrentPathEffect(false); + } + } else { + sp_lpe_item->removeCurrentPathEffect(false); + } +} + +Glib::ustring LPEPowerClip::getId() { return Glib::ustring("lpe_") + Glib::ustring(getLPEObj()->getId()); } + +void LPEPowerClip::upd() +{ + SPDocument *document = getSPDoc(); + if (!document || !sp_lpe_item) { + return; + } + SPObject *elemref = document->getObjectById(getId().c_str()); + if (elemref && sp_lpe_item) { + elemref->setAttribute("d", sp_svg_write_path(getClipPathvector())); + elemref->updateRepr(SP_OBJECT_WRITE_NO_CHILDREN | SP_OBJECT_WRITE_EXT); + } else { + add(); + } +} + + +void LPEPowerClip::doBeforeEffect(SPLPEItem const *lpeitem) +{ + if (!_updating) { + upd(); + } +} + +void +LPEPowerClip::doOnRemove (SPLPEItem const* /*lpeitem*/) +{ + SPDocument *document = getSPDoc(); + if (!document) { + return; + } + if (keep_paths || document->onungroup) { + SPObject *clip_path = sp_lpe_item->getClipObject(); + if (clip_path) { + SPLPEItem *childitem = dynamic_cast<SPLPEItem *>(clip_path->childList(true).front()); + childitem->deleteObject(); + } + return; + } + _updating = true; + SPObject *elemref = document->getObjectById(getId().c_str()); + if (elemref) { + elemref->deleteObject(); + } + SPObject *clip_path = sp_lpe_item->getClipObject(); + if (clip_path) { + std::vector<SPObject *> clip_path_list = clip_path->childList(true); + for (auto clip : clip_path_list) { + SPLPEItem *childitem = dynamic_cast<SPLPEItem *>(clip); + if (childitem) { + if (!childitem->style || childitem->style->display.set || + childitem->style->display.value == SP_CSS_DISPLAY_NONE) { + childitem->style->display.set = TRUE; + childitem->style->display.value = SP_CSS_DISPLAY_BLOCK; + childitem->updateRepr(SP_OBJECT_WRITE_NO_CHILDREN | SP_OBJECT_WRITE_EXT); + } + } + } + } +} + +Geom::PathVector +LPEPowerClip::doEffect_path(Geom::PathVector const & path_in){ + Geom::PathVector path_out = path_in; + if (flatten) { + Geom::PathVector c_pv = getClipPathvector(); + std::unique_ptr<Geom::PathIntersectionGraph> pig(new Geom::PathIntersectionGraph(c_pv, path_out)); + if (pig && !c_pv.empty() && !path_out.empty()) { + path_out = pig->getIntersection(); + } + } + return path_out; +} + +void LPEPowerClip::doOnVisibilityToggled(SPLPEItem const *lpeitem) { upd(); } + +void sp_remove_powerclip(Inkscape::Selection *sel) +{ + if (!sel->isEmpty()) { + auto selList = sel->items(); + for (auto i = boost::rbegin(selList); i != boost::rend(selList); ++i) { + SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(*i); + if (lpeitem) { + if (lpeitem->hasPathEffect() && lpeitem->pathEffectsEnabled()) { + PathEffectList path_effect_list(*lpeitem->path_effect_list); + for (auto &lperef : path_effect_list) { + LivePathEffectObject *lpeobj = lperef->lpeobject; + if (!lpeobj) { + /** \todo Investigate the cause of this. + * For example, this happens when copy pasting an object with LPE applied. Probably because + * the object is pasted while the effect is not yet pasted to defs, and cannot be found. + */ + g_warning("SPLPEItem::performPathEffect - NULL lpeobj in list!"); + return; + } + if (LPETypeConverter.get_key(lpeobj->effecttype) == "powerclip") { + lpeitem->setCurrentPathEffect(lperef); + lpeitem->removeCurrentPathEffect(false); + break; + } + } + } + } + } + } +} + +void sp_inverse_powerclip(Inkscape::Selection *sel) { + if (!sel->isEmpty()) { + auto selList = sel->items(); + for(auto i = boost::rbegin(selList); i != boost::rend(selList); ++i) { + SPLPEItem* lpeitem = dynamic_cast<SPLPEItem*>(*i); + if (lpeitem) { + SPClipPath *clip_path = lpeitem->getClipObject(); + if(clip_path) { + std::vector<SPObject*> clip_path_list = clip_path->childList(true); + for (auto iter : clip_path_list) { + SPUse *use = dynamic_cast<SPUse*>(iter); + if (use) { + g_warning("We can`t add inverse clip on clones"); + return; + } + } + Effect::createAndApply(POWERCLIP, SP_ACTIVE_DOCUMENT, lpeitem); + Effect* lpe = lpeitem->getCurrentLPE(); + if (lpe) { + lpe->getRepr()->setAttribute("inverse", "true"); + } + } + } + } + } +} + +}; //namespace LivePathEffect +}; /* namespace Inkscape */ + +/* + 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 : |