void
gr_apply_gradient_to_item (SPItem *item, SPGradient *gr, SPGradientType new_type, guint new_fill, bool do_fill, bool do_stroke)
{
SPStyle *style = SP_OBJECT_STYLE (item);
if (do_fill) {
if (style && (style->fill.isPaintserver()) &&
SP_IS_GRADIENT (SP_OBJECT_STYLE_FILL_SERVER (item))) {
SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
if (SP_IS_LINEARGRADIENT (server)) {
sp_item_set_gradient(item, gr, SP_GRADIENT_TYPE_LINEAR, true);
} else if (SP_IS_RADIALGRADIENT (server)) {
sp_item_set_gradient(item, gr, SP_GRADIENT_TYPE_RADIAL, true);
}
} else if (new_fill) {
sp_item_set_gradient(item, gr, new_type, true);
}
}
if (do_stroke) {
if (style && (style->stroke.isPaintserver()) &&
SP_IS_GRADIENT (SP_OBJECT_STYLE_STROKE_SERVER (item))) {
SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
if (SP_IS_LINEARGRADIENT (server)) {
sp_item_set_gradient(item, gr, SP_GRADIENT_TYPE_LINEAR, false);
} else if (SP_IS_RADIALGRADIENT (server)) {
sp_item_set_gradient(item, gr, SP_GRADIENT_TYPE_RADIAL, false);
}
} else if (!new_fill) {
sp_item_set_gradient(item, gr, new_type, false);
}
}
}
/**
* Writes the gradient's internal vector (whether from its own stops, or
* inherited from refs) into the gradient repr as svg:stop elements.
*/
void
sp_gradient_repr_write_vector(SPGradient *gr)
{
g_return_if_fail(gr != NULL);
g_return_if_fail(SP_IS_GRADIENT(gr));
Inkscape::XML::Document *xml_doc = gr->document->getReprDoc();
Inkscape::XML::Node *repr = gr->getRepr();
/* We have to be careful, as vector may be our own, so construct repr list at first */
GSList *cl = NULL;
for (guint i = 0; i < gr->vector.stops.size(); i++) {
Inkscape::CSSOStringStream os;
Inkscape::XML::Node *child = xml_doc->createElement("svg:stop");
sp_repr_set_css_double(child, "offset", gr->vector.stops[i].offset);
/* strictly speaking, offset an SVG <number> rather than a CSS one, but exponents make no
* sense for offset proportions. */
os << "stop-color:" << gr->vector.stops[i].color.toString() << ";stop-opacity:" << gr->vector.stops[i].opacity;
child->setAttribute("style", os.str().c_str());
/* Order will be reversed here */
cl = g_slist_prepend(cl, child);
}
sp_gradient_repr_clear_vector(gr);
/* And insert new children from list */
while (cl) {
Inkscape::XML::Node *child = static_cast<Inkscape::XML::Node *>(cl->data);
repr->addChild(child, NULL);
Inkscape::GC::release(child);
cl = g_slist_remove(cl, child);
}
}
/**
* Returns the first of {src, src-\>ref-\>getObject(),
* src-\>ref-\>getObject()-\>ref-\>getObject(),...}
* for which \a match is true, or NULL if none found.
*
* The raison d'être of this routine is that it correctly handles cycles in the href chain (e.g., if
* a gradient gives itself as its href, or if each of two gradients gives the other as its href).
*
* \pre SP_IS_GRADIENT(src).
*/
static SPGradient *
chase_hrefs(SPGradient *const src, bool (*match)(SPGradient const *))
{
g_return_val_if_fail(SP_IS_GRADIENT(src), NULL);
/* Use a pair of pointers for detecting loops: p1 advances half as fast as p2. If there is a
loop, then once p1 has entered the loop, we'll detect it the next time the distance between
p1 and p2 is a multiple of the loop size. */
SPGradient *p1 = src, *p2 = src;
bool do1 = false;
for (;;) {
if (match(p2)) {
return p2;
}
p2 = p2->ref->getObject();
if (!p2) {
return p2;
}
if (do1) {
p1 = p1->ref->getObject();
}
do1 = !do1;
if ( p2 == p1 ) {
/* We've been here before, so return NULL to indicate that no matching gradient found
* in the chain. */
return NULL;
}
}
}
/**
* Gets called when the gradient is (re)attached to another gradient.
*/
void SPGradient::gradientRefChanged(SPObject *old_ref, SPObject *ref, SPGradient *gr)
{
if (old_ref) {
gr->modified_connection.disconnect();
}
if ( SP_IS_GRADIENT(ref)
&& ref != gr )
{
gr->modified_connection = ref->connectModified(sigc::bind<2>(sigc::ptr_fun(&SPGradient::gradientRefModified), gr));
}
// Per SVG, all unset attributes must be inherited from linked gradient.
// So, as we're now (re)linked, we assign linkee's values to this gradient if they are not yet set -
// but without setting the _set flags.
// FIXME: do the same for gradientTransform too
if (!gr->units_set) {
gr->units = gr->fetchUnits();
}
if (!gr->spread_set) {
gr->spread = gr->fetchSpread();
}
/// \todo Fixme: what should the flags (second) argument be? */
gradientRefModified(ref, 0, gr);
}
// TODO: So a solid brush is a gradient with a swatch and zero stops?
// Should we derive a new class for that? Or at least make this method
// virtual and move it out of the way?
bool SPPaintServer::isSolid() const
{
bool solid = false;
if (swatch && SP_IS_GRADIENT(this)) {
SPGradient *grad = SP_GRADIENT(this);
if ( grad->hasStops() && (grad->getStopCount() == 0) ) {
solid = true;
}
}
return solid;
}
static void
sp_gradient_context_add_stops_between_selected_stops (SPGradientContext *rc)
{
SPDocument *doc = NULL;
GrDrag *drag = rc->_grdrag;
GSList *these_stops = NULL;
GSList *next_stops = NULL;
std::vector<Geom::Point> coords = sp_gradient_context_get_stop_intervals (drag, &these_stops, &next_stops);
if (g_slist_length(these_stops) == 0 && drag->numSelected() == 1) {
// if a single stop is selected, add between that stop and the next one
GrDragger *dragger = (GrDragger *) drag->selected->data;
for (GSList const* j = dragger->draggables; j != NULL; j = j->next) {
GrDraggable *d = (GrDraggable *) j->data;
SPGradient *gradient = sp_item_gradient (d->item, d->fill_or_stroke);
SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false);
SPStop *this_stop = sp_get_stop_i (vector, d->point_i);
SPStop *next_stop = sp_next_stop (this_stop);
if (this_stop && next_stop) {
these_stops = g_slist_prepend (these_stops, this_stop);
next_stops = g_slist_prepend (next_stops, next_stop);
}
}
}
// now actually create the new stops
GSList *i = these_stops;
GSList *j = next_stops;
for (; i != NULL && j != NULL; i = i->next, j = j->next) {
SPStop *this_stop = (SPStop *) i->data;
SPStop *next_stop = (SPStop *) j->data;
gfloat offset = 0.5*(this_stop->offset + next_stop->offset);
SPObject *parent = SP_OBJECT_PARENT(this_stop);
if (SP_IS_GRADIENT (parent)) {
doc = SP_OBJECT_DOCUMENT (parent);
sp_vector_add_stop (SP_GRADIENT (parent), this_stop, next_stop, offset);
sp_gradient_ensure_vector (SP_GRADIENT (parent));
}
}
if (g_slist_length(these_stops) > 0 && doc) {
sp_document_done (doc, SP_VERB_CONTEXT_GRADIENT, _("Add gradient stop"));
drag->updateDraggers();
// so that it does not automatically update draggers in idle loop, as this would deselect
drag->local_change = true;
// select all the old selected and new created draggers
drag->selectByCoords(coords);
}
g_slist_free (these_stops);
g_slist_free (next_stops);
}
static SPObject *
sp_gradient_load_from_svg(gchar const *name, SPDocument *current_doc)
{
static SPDocument *doc = NULL;
static unsigned int edoc = FALSE;
if (!current_doc) {
return NULL;
}
/* Try to load from document */
if (!edoc && !doc) {
gchar *gradients = g_build_filename(INKSCAPE_GRADIENTSDIR, "/gradients.svg", NULL);
if (Inkscape::IO::file_test(gradients, G_FILE_TEST_IS_REGULAR)) {
doc = SPDocument::createNewDoc(gradients, FALSE);
}
if (!doc) {
gchar *gradients = g_build_filename(CREATE_GRADIENTSDIR, "/gradients.svg", NULL);
if (Inkscape::IO::file_test(gradients, G_FILE_TEST_IS_REGULAR)) {
doc = SPDocument::createNewDoc(gradients, FALSE);
}
g_free(gradients);
if (doc) {
doc->ensureUpToDate();
} else {
edoc = TRUE;
}
}
}
if (!edoc && doc) {
/* Get the gradient we want */
SPObject *object = doc->getObjectById(name);
if (object && SP_IS_GRADIENT(object)) {
SPDefs *defs = current_doc->getDefs();
Inkscape::XML::Document *xml_doc = current_doc->getReprDoc();
Inkscape::XML::Node *pat_repr = object->getRepr()->duplicate(xml_doc);
defs->getRepr()->addChild(pat_repr, NULL);
Inkscape::GC::release(pat_repr);
return object;
}
}
return NULL;
}
SPObject *get_stock_item(gchar const *urn, gboolean stock)
{
g_assert(urn != NULL);
/* check its an inkscape URN */
if (!strncmp (urn, "urn:inkscape:", 13)) {
gchar const *e = urn + 13;
int a = 0;
gchar * name = g_strdup(e);
gchar *name_p = name;
while (*name_p != ':' && *name_p != '\0'){
name_p++;
a++;
}
if (*name_p ==':') {
name_p++;
}
gchar * base = g_strndup(e, a);
SPDesktop *desktop = SP_ACTIVE_DESKTOP;
SPDocument *doc = desktop->getDocument();
SPDefs *defs = doc->getDefs();
if (!defs) {
g_free(base);
return NULL;
}
SPObject *object = NULL;
if (!strcmp(base, "marker") && !stock) {
for ( SPObject *child = defs->firstChild(); child; child = child->getNext() )
{
if (child->getRepr()->attribute("inkscape:stockid") &&
!strcmp(name_p, child->getRepr()->attribute("inkscape:stockid")) &&
SP_IS_MARKER(child))
{
object = child;
}
}
}
else if (!strcmp(base,"pattern") && !stock) {
for ( SPObject *child = defs->firstChild() ; child; child = child->getNext() )
{
if (child->getRepr()->attribute("inkscape:stockid") &&
!strcmp(name_p, child->getRepr()->attribute("inkscape:stockid")) &&
SP_IS_PATTERN(child))
{
object = child;
}
}
}
else if (!strcmp(base,"gradient") && !stock) {
for ( SPObject *child = defs->firstChild(); child; child = child->getNext() )
{
if (child->getRepr()->attribute("inkscape:stockid") &&
!strcmp(name_p, child->getRepr()->attribute("inkscape:stockid")) &&
SP_IS_GRADIENT(child))
{
object = child;
}
}
}
if (object == NULL) {
if (!strcmp(base, "marker")) {
object = sp_marker_load_from_svg(name_p, doc);
}
else if (!strcmp(base, "pattern")) {
object = sp_pattern_load_from_svg(name_p, doc);
}
else if (!strcmp(base, "gradient")) {
object = sp_gradient_load_from_svg(name_p, doc);
}
}
g_free(base);
g_free(name);
if (object) {
object->getRepr()->setAttribute("inkscape:isstock", "true");
}
return object;
}
else {
SPDesktop *desktop = SP_ACTIVE_DESKTOP;
SPDocument *doc = desktop->getDocument();
SPObject *object = doc->getObjectById(urn);
return object;
}
}
void
gr_read_selection (Inkscape::Selection *selection, GrDrag *drag, SPGradient **gr_selected, bool *gr_multi, SPGradientSpread *spr_selected, bool *spr_multi)
{
if (drag && drag->selected) {
// GRADIENTFIXME: make this work for more than one selected dragger?
GrDragger *dragger = (GrDragger*) drag->selected->data;
for (GSList const* i = dragger->draggables; i != NULL; i = i->next) { // for all draggables of dragger
GrDraggable *draggable = (GrDraggable *) i->data;
SPGradient *gradient = sp_item_gradient_get_vector (draggable->item, draggable->fill_or_stroke);
SPGradientSpread spread = sp_item_gradient_get_spread (draggable->item, draggable->fill_or_stroke);
if (gradient != *gr_selected) {
if (*gr_selected != NULL) {
*gr_multi = true;
} else {
*gr_selected = gradient;
}
}
if (spread != *spr_selected) {
if (*spr_selected != INT_MAX) {
*spr_multi = true;
} else {
*spr_selected = spread;
}
}
}
return;
}
// If no selected dragger, read desktop selection
for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
SPItem *item = SP_ITEM(i->data);
SPStyle *style = SP_OBJECT_STYLE (item);
if (style && (style->fill.isPaintserver())) {
SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
if (SP_IS_GRADIENT (server)) {
SPGradient *gradient = sp_gradient_get_vector (SP_GRADIENT (server), false);
SPGradientSpread spread = sp_gradient_get_spread (SP_GRADIENT (server));
if (gradient != *gr_selected) {
if (*gr_selected != NULL) {
*gr_multi = true;
} else {
*gr_selected = gradient;
}
}
if (spread != *spr_selected) {
if (*spr_selected != INT_MAX) {
*spr_multi = true;
} else {
*spr_selected = spread;
}
}
}
}
if (style && (style->stroke.isPaintserver())) {
SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
if (SP_IS_GRADIENT (server)) {
SPGradient *gradient = sp_gradient_get_vector (SP_GRADIENT (server), false);
SPGradientSpread spread = sp_gradient_get_spread (SP_GRADIENT (server));
if (gradient != *gr_selected) {
if (*gr_selected != NULL) {
*gr_multi = true;
} else {
*gr_selected = gradient;
}
}
if (spread != *spr_selected) {
if (*spr_selected != INT_MAX) {
*spr_multi = true;
} else {
*spr_selected = spread;
}
}
}
}
}
}
