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-rw-r--r--src/selection.cpp450
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diff --git a/src/selection.cpp b/src/selection.cpp
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+++ b/src/selection.cpp
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+/** \file
+ * Per-desktop selection container
+ *
+ * Authors:
+ * Lauris Kaplinski <lauris@kaplinski.com>
+ * MenTaLguY <mental@rydia.net>
+ * bulia byak <buliabyak@users.sf.net>
+ *
+ * Copyright (C) 2004-2005 MenTaLguY
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 2001-2002 Ximian, Inc.
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include "macros.h"
+#include "inkscape-private.h"
+#include "desktop.h"
+#include "desktop-handles.h"
+#include "document.h"
+#include "selection.h"
+#include "xml/repr.h"
+
+#include "sp-shape.h"
+
+
+#define SP_SELECTION_UPDATE_PRIORITY (G_PRIORITY_HIGH_IDLE + 1)
+
+namespace Inkscape {
+
+Selection::Selection(SPDesktop *desktop) :
+ _objs(NULL),
+ _reprs(NULL),
+ _items(NULL),
+ _desktop(desktop),
+ _flags(0),
+ _idle(0)
+{
+ clearOnceInaccessible(&_desktop);
+}
+
+Selection::~Selection() {
+ _clear();
+ _desktop = NULL;
+ if (_idle) {
+ g_source_remove(_idle);
+ _idle = 0;
+ }
+}
+
+void
+Selection::_release(SPObject *obj, Selection *selection)
+{
+ selection->remove(obj);
+}
+
+/* Handler for selected objects "modified" signal */
+
+void
+Selection::_schedule_modified(SPObject *obj, guint flags, Selection *selection)
+{
+ if (!selection->_idle) {
+ /* Request handling to be run in _idle loop */
+ selection->_idle = g_idle_add_full(SP_SELECTION_UPDATE_PRIORITY, GSourceFunc(&Selection::_emit_modified), selection, NULL);
+ }
+
+ /* Collect all flags */
+ selection->_flags |= flags;
+}
+
+gboolean
+Selection::_emit_modified(Selection *selection)
+{
+ /* force new handler to be created if requested before we return */
+ selection->_idle = 0;
+ guint flags = selection->_flags;
+ selection->_flags = 0;
+
+ selection->_emitModified(flags);
+
+ /* drop this handler */
+ return FALSE;
+}
+
+void Selection::_emitModified(guint flags) {
+ inkscape_selection_modified(this, flags);
+ _modified_signal.emit(this, flags);
+}
+
+void Selection::_emitChanged() {
+ inkscape_selection_changed(this);
+ _changed_signal.emit(this);
+}
+
+void Selection::_invalidateCachedLists() {
+ g_slist_free(_items);
+ _items = NULL;
+
+ g_slist_free(_reprs);
+ _reprs = NULL;
+}
+
+void Selection::_clear() {
+ _invalidateCachedLists();
+ while (_objs) {
+ SPObject *obj=reinterpret_cast<SPObject *>(_objs->data);
+ sp_signal_disconnect_by_data(obj, this);
+ _objs = g_slist_remove(_objs, obj);
+ }
+}
+
+bool Selection::includes(SPObject *obj) const {
+ if (obj == NULL)
+ return FALSE;
+
+ g_return_val_if_fail(SP_IS_OBJECT(obj), FALSE);
+
+ return ( g_slist_find(_objs, obj) != NULL );
+}
+
+void Selection::add(SPObject *obj) {
+ g_return_if_fail(obj != NULL);
+ g_return_if_fail(SP_IS_OBJECT(obj));
+
+ if (includes(obj)) {
+ return;
+ }
+
+ _invalidateCachedLists();
+ _add(obj);
+ _emitChanged();
+}
+
+void Selection::_add(SPObject *obj) {
+ // unselect any of the item's ancestors and descendants which may be selected
+ // (to prevent double-selection)
+ _removeObjectDescendants(obj);
+ _removeObjectAncestors(obj);
+
+ _objs = g_slist_prepend(_objs, obj);
+ g_signal_connect(G_OBJECT(obj), "release",
+ G_CALLBACK(&Selection::_release), this);
+ g_signal_connect(G_OBJECT(obj), "modified",
+ G_CALLBACK(&Selection::_schedule_modified), this);
+
+ /*
+ if (!SP_IS_SHAPE(obj)) {
+ printf("This is not a shape\n");
+ }
+ */
+}
+
+void Selection::set(SPObject *object) {
+ _clear();
+ add(object);
+}
+
+void Selection::toggle(SPObject *obj) {
+ if (includes (obj)) {
+ remove (obj);
+ } else {
+ add(obj);
+ }
+}
+
+void Selection::remove(SPObject *obj) {
+ g_return_if_fail(obj != NULL);
+ g_return_if_fail(SP_IS_OBJECT(obj));
+ g_return_if_fail(includes(obj));
+
+ _invalidateCachedLists();
+ _remove(obj);
+ _emitChanged();
+}
+
+void Selection::_remove(SPObject *obj) {
+ sp_signal_disconnect_by_data(obj, this);
+ _objs = g_slist_remove(_objs, obj);
+}
+
+void Selection::setList(GSList const *list) {
+ _clear();
+
+ if ( list != NULL ) {
+ for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
+ _add(reinterpret_cast<SPObject *>(iter->data));
+ }
+ }
+
+ _emitChanged();
+}
+
+void Selection::addList(GSList const *list) {
+
+ if (list == NULL)
+ return;
+
+ _invalidateCachedLists();
+
+ for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
+ SPObject *obj = reinterpret_cast<SPObject *>(iter->data);
+ if (includes(obj)) {
+ continue;
+ }
+ _add (obj);
+ }
+
+ _emitChanged();
+}
+
+void Selection::setReprList(GSList const *list) {
+ _clear();
+
+ for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
+ SPObject *obj=_objectForXMLNode(reinterpret_cast<Inkscape::XML::Node *>(iter->data));
+ if (obj) {
+ _add(obj);
+ }
+ }
+
+ _emitChanged();
+}
+
+void Selection::clear() {
+ _clear();
+ _emitChanged();
+}
+
+GSList const *Selection::list() {
+ return _objs;
+}
+
+GSList const *Selection::itemList() {
+ if (_items) {
+ return _items;
+ }
+
+ for ( GSList const *iter=_objs ; iter != NULL ; iter = iter->next ) {
+ SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
+ if (SP_IS_ITEM(obj)) {
+ _items = g_slist_prepend(_items, SP_ITEM(obj));
+ }
+ }
+ _items = g_slist_reverse(_items);
+
+ return _items;
+}
+
+GSList const *Selection::reprList() {
+ if (_reprs) { return _reprs; }
+
+ for ( GSList const *iter=itemList() ; iter != NULL ; iter = iter->next ) {
+ SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
+ _reprs = g_slist_prepend(_reprs, SP_OBJECT_REPR(obj));
+ }
+ _reprs = g_slist_reverse(_reprs);
+
+ return _reprs;
+}
+
+SPObject *Selection::single() {
+ if ( _objs != NULL && _objs->next == NULL ) {
+ return reinterpret_cast<SPObject *>(_objs->data);
+ } else {
+ return NULL;
+ }
+}
+
+SPItem *Selection::singleItem() {
+ GSList const *items=itemList();
+ if ( items != NULL && items->next == NULL ) {
+ return reinterpret_cast<SPItem *>(items->data);
+ } else {
+ return NULL;
+ }
+}
+
+Inkscape::XML::Node *Selection::singleRepr() {
+ SPObject *obj=single();
+ return obj ? SP_OBJECT_REPR(obj) : NULL;
+}
+
+NRRect *Selection::bounds(NRRect *bbox) const
+{
+ g_return_val_if_fail (bbox != NULL, NULL);
+ NR::Rect const b = bounds();
+ bbox->x0 = b.min()[NR::X];
+ bbox->y0 = b.min()[NR::Y];
+ bbox->x1 = b.max()[NR::X];
+ bbox->x1 = b.max()[NR::Y];
+ return bbox;
+}
+
+NR::Rect Selection::bounds() const
+{
+ GSList const *items = const_cast<Selection *>(this)->itemList();
+ if (!items) {
+ return NR::Rect(NR::Point(0, 0), NR::Point(0, 0));
+ }
+
+ GSList const *i = items;
+ NR::Rect bbox = sp_item_bbox_desktop(SP_ITEM(i->data));
+
+ while (i != NULL) {
+ bbox = NR::Rect::union_bounds(bbox, sp_item_bbox_desktop(SP_ITEM(i->data)));
+ i = i->next;
+ }
+
+ return bbox;
+}
+
+NRRect *Selection::boundsInDocument(NRRect *bbox) const {
+ g_return_val_if_fail (bbox != NULL, NULL);
+
+ GSList const *items=const_cast<Selection *>(this)->itemList();
+ if (!items) {
+ bbox->x0 = bbox->y0 = bbox->x1 = bbox->y1 = 0.0;
+ return bbox;
+ }
+
+ bbox->x0 = bbox->y0 = 1e18;
+ bbox->x1 = bbox->y1 = -1e18;
+
+ for ( GSList const *iter=items ; iter != NULL ; iter = iter->next ) {
+ SPItem *item=SP_ITEM(iter->data);
+ NR::Matrix const i2doc(sp_item_i2doc_affine(item));
+ sp_item_invoke_bbox(item, bbox, i2doc, FALSE);
+ }
+
+ return bbox;
+}
+
+NR::Rect Selection::boundsInDocument() const {
+ NRRect r;
+ return NR::Rect(*boundsInDocument(&r));
+}
+
+/**
+ * Compute the list of points in the selection that are to be considered for snapping.
+ */
+std::vector<NR::Point> Selection::getSnapPoints() const {
+ GSList const *items = const_cast<Selection *>(this)->itemList();
+ std::vector<NR::Point> p;
+ for (GSList const *iter = items; iter != NULL; iter = iter->next) {
+ sp_item_snappoints(SP_ITEM(iter->data), SnapPointsIter(p));
+ }
+
+ return p;
+}
+
+std::vector<NR::Point> Selection::getSnapPointsConvexHull() const {
+ GSList const *items = const_cast<Selection *>(this)->itemList();
+ std::vector<NR::Point> p;
+ for (GSList const *iter = items; iter != NULL; iter = iter->next) {
+ sp_item_snappoints(SP_ITEM(iter->data), SnapPointsIter(p));
+ }
+
+ std::vector<NR::Point>::iterator i;
+ NR::ConvexHull cvh(*(p.begin()));
+ for (i = p.begin(); i != p.end(); i++) {
+ // these are the points we get back
+ cvh.add(*i);
+ }
+
+ NR::Rect rHull = cvh.bounds();
+ std::vector<NR::Point> pHull(4);
+ pHull[0] = rHull.corner(0);
+ pHull[1] = rHull.corner(1);
+ pHull[2] = rHull.corner(2);
+ pHull[3] = rHull.corner(3);
+
+ return pHull;
+}
+
+std::vector<NR::Point> Selection::getBBoxPoints() const {
+ GSList const *items = const_cast<Selection *>(this)->itemList();
+ std::vector<NR::Point> p;
+ for (GSList const *iter = items; iter != NULL; iter = iter->next) {
+ NR::Rect b = sp_item_bbox_desktop(SP_ITEM(iter->data));
+ p.push_back(b.min());
+ p.push_back(b.max());
+ }
+
+ return p;
+}
+
+void Selection::_removeObjectDescendants(SPObject *obj) {
+ GSList *iter, *next;
+ for ( iter = _objs ; iter ; iter = next ) {
+ next = iter->next;
+ SPObject *sel_obj=reinterpret_cast<SPObject *>(iter->data);
+ SPObject *parent=SP_OBJECT_PARENT(sel_obj);
+ while (parent) {
+ if ( parent == obj ) {
+ _remove(sel_obj);
+ break;
+ }
+ parent = SP_OBJECT_PARENT(parent);
+ }
+ }
+}
+
+void Selection::_removeObjectAncestors(SPObject *obj) {
+ SPObject *parent=SP_OBJECT_PARENT(obj);
+ while (parent) {
+ if (includes(parent)) {
+ _remove(parent);
+ }
+ parent = SP_OBJECT_PARENT(parent);
+ }
+}
+
+SPObject *Selection::_objectForXMLNode(Inkscape::XML::Node *repr) const {
+ g_return_val_if_fail(repr != NULL, NULL);
+ gchar const *id = repr->attribute("id");
+ g_return_val_if_fail(id != NULL, NULL);
+ SPObject *object=SP_DT_DOCUMENT(_desktop)->getObjectById(id);
+ g_return_val_if_fail(object != NULL, NULL);
+ return object;
+}
+
+guint Selection::numberOfLayers() {
+ GSList const *items = const_cast<Selection *>(this)->itemList();
+ GSList *layers = NULL;
+ for (GSList const *iter = items; iter != NULL; iter = iter->next) {
+ SPObject *layer = desktop()->layerForObject(SP_OBJECT(iter->data));
+ if (g_slist_find (layers, layer) == NULL) {
+ layers = g_slist_prepend (layers, layer);
+ }
+ }
+ guint ret = g_slist_length (layers);
+ g_slist_free (layers);
+ return ret;
+}
+
+}
+
+/*
+ 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:encoding=utf-8:textwidth=99 :
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