diff options
Diffstat (limited to 'src/object/sp-use-reference.cpp')
| -rw-r--r-- | src/object/sp-use-reference.cpp | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/object/sp-use-reference.cpp b/src/object/sp-use-reference.cpp new file mode 100644 index 0000000..f2b8575 --- /dev/null +++ b/src/object/sp-use-reference.cpp @@ -0,0 +1,233 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * The reference corresponding to href of <use> element. + * + * Copyright (C) 2004 Bulia Byak + * Copyright (C) 2004 Monash University + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include "sp-use-reference.h" + +#include <cstring> +#include <string> + +#include "bad-uri-exception.h" +#include "enums.h" + +#include "display/curve.h" +#include "livarot/Path.h" +#include "preferences.h" +#include "sp-shape.h" +#include "sp-text.h" +#include "uri.h" + +bool SPUseReference::_acceptObject(SPObject * const obj) const +{ + return URIReference::_acceptObject(obj); +} + + +static void sp_usepath_href_changed(SPObject *old_ref, SPObject *ref, SPUsePath *offset); +static void sp_usepath_move_compensate(Geom::Affine const *mp, SPItem *original, SPUsePath *self); +static void sp_usepath_delete_self(SPObject *deleted, SPUsePath *offset); +static void sp_usepath_source_modified(SPObject *iSource, guint flags, SPUsePath *offset); + +SPUsePath::SPUsePath(SPObject* i_owner):SPUseReference(i_owner) +{ + owner=i_owner; + originalPath = nullptr; + sourceDirty=false; + sourceHref = nullptr; + sourceRepr = nullptr; + sourceObject = nullptr; + _changed_connection = changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_usepath_href_changed), this)); // listening to myself, this should be virtual instead + + user_unlink = nullptr; +} + +SPUsePath::~SPUsePath() +{ + if (originalPath != nullptr) { + originalPath->unref(); + } + + _changed_connection.disconnect(); // to do before unlinking + + quit_listening(); + unlink(); +} + +void +SPUsePath::link(char *to) +{ + if ( to == nullptr ) { + quit_listening(); + unlink(); + } else { + if ( !sourceHref || ( strcmp(to, sourceHref) != 0 ) ) { + g_free(sourceHref); + sourceHref = g_strdup(to); + try { + attach(Inkscape::URI(to)); + } catch (Inkscape::BadURIException &e) { + /* TODO: Proper error handling as per + * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing. + */ + g_warning("%s", e.what()); + detach(); + } + } + } +} + +void +SPUsePath::unlink() +{ + g_free(sourceHref); + sourceHref = nullptr; + detach(); +} + +void +SPUsePath::start_listening(SPObject* to) +{ + if ( to == nullptr ) { + return; + } + sourceObject = to; + sourceRepr = to->getRepr(); + _delete_connection = to->connectDelete(sigc::bind(sigc::ptr_fun(&sp_usepath_delete_self), this)); + _transformed_connection = SP_ITEM(to)->connectTransformed(sigc::bind(sigc::ptr_fun(&sp_usepath_move_compensate), this)); + _modified_connection = to->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_usepath_source_modified), this)); +} + +void +SPUsePath::quit_listening() +{ + if ( sourceObject == nullptr ) { + return; + } + _modified_connection.disconnect(); + _delete_connection.disconnect(); + _transformed_connection.disconnect(); + sourceRepr = nullptr; + sourceObject = nullptr; +} + +static void +sp_usepath_href_changed(SPObject */*old_ref*/, SPObject */*ref*/, SPUsePath *offset) +{ + offset->quit_listening(); + SPItem *refobj = offset->getObject(); + if ( refobj ) { + offset->start_listening(refobj); + } + offset->sourceDirty=true; + offset->owner->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static void +sp_usepath_move_compensate(Geom::Affine const *mp, SPItem *original, SPUsePath *self) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + guint mode = prefs->getInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_PARALLEL); + if (mode == SP_CLONE_COMPENSATION_NONE) { + return; + } + SPItem *item = SP_ITEM(self->owner); + +// TODO kill naughty naughty #if 0 +#if 0 + Geom::Affine m(*mp); + if (!(m.is_translation())) { + return; + } + Geom::Affine const t(item->transform); + Geom::Affine clone_move = t.inverse() * m * t; + + // Calculate the compensation matrix and the advertized movement matrix. + Geom::Affine advertized_move; + if (mode == SP_CLONE_COMPENSATION_PARALLEL) { + //clone_move = clone_move.inverse(); + advertized_move.set_identity(); + } else if (mode == SP_CLONE_COMPENSATION_UNMOVED) { + clone_move = clone_move.inverse() * m; + advertized_move = m; + } else { + g_assert_not_reached(); + } + + // Commit the compensation. + item->transform *= clone_move; + sp_item_write_transform(item, item->getRepr(), item->transform, &advertized_move); +#else + (void)mp; + (void)original; +#endif + + self->sourceDirty = true; + item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static void +sp_usepath_delete_self(SPObject */*deleted*/, SPUsePath *offset) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + guint const mode = prefs->getInt("/options/cloneorphans/value", SP_CLONE_ORPHANS_UNLINK); + + if (mode == SP_CLONE_ORPHANS_UNLINK) { + // leave it be. just forget about the source + offset->quit_listening(); + offset->unlink(); + if (offset->user_unlink) + offset->user_unlink(offset->owner); + } else if (mode == SP_CLONE_ORPHANS_DELETE) { + offset->owner->deleteObject(); + } +} + +static void +sp_usepath_source_modified(SPObject */*iSource*/, guint /*flags*/, SPUsePath *offset) +{ + offset->sourceDirty = true; + offset->owner->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +void SPUsePath::refresh_source() +{ + sourceDirty = false; + + if (originalPath != nullptr) { + originalPath->unref(); + } + + SPObject *refobj = sourceObject; + if ( refobj == nullptr ) return; + + SPItem *item = SP_ITEM(refobj); + + if (SP_IS_SHAPE(item)) { + SPCurve *originalCurve = SP_SHAPE(item)->getCurve(); + if (originalCurve != nullptr) { + originalPath = originalCurve->copy(); + } else { + sourceDirty = true; + } + } else if (SP_IS_TEXT(item)) { + originalPath = SP_TEXT(item)->getNormalizedBpath()->copy(); + } +} + + +/* + 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 : |