Inkscape::DrawingItem *SPClipPath::show(Inkscape::Drawing &drawing, unsigned int key) {
Inkscape::DrawingGroup *ai = new Inkscape::DrawingGroup(drawing);
display = sp_clippath_view_new_prepend(display, key, ai);
for ( SPObject *child = firstChild() ; child ; child = child->getNext() ) {
if (SP_IS_ITEM(child)) {
Inkscape::DrawingItem *ac = SP_ITEM(child)->invoke_show(drawing, key, SP_ITEM_REFERENCE_FLAGS);
if (ac) {
/* The order is not important in clippath */
ai->appendChild(ac);
}
}
}
if (clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && display->bbox) {
Geom::Affine t = Geom::Scale(display->bbox->dimensions());
t.setTranslation(display->bbox->min());
ai->setChildTransform(t);
}
ai->setStyle(this->style);
return ai;
}
void SPClipPath::update(SPCtx* ctx, unsigned int flags) {
if (flags & SP_OBJECT_MODIFIED_FLAG) {
flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
}
flags &= SP_OBJECT_MODIFIED_CASCADE;
GSList *l = NULL;
for ( SPObject *child = this->firstChild(); child; child = child->getNext()) {
sp_object_ref(child);
l = g_slist_prepend(l, child);
}
l = g_slist_reverse(l);
while (l) {
SPObject *child = SP_OBJECT(l->data);
l = g_slist_remove(l, child);
if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
child->updateDisplay(ctx, flags);
}
sp_object_unref(child);
}
for (SPClipPathView *v = this->display; v != NULL; v = v->next) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
if (this->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && v->bbox) {
Geom::Affine t = Geom::Scale(v->bbox->dimensions());
t.setTranslation(v->bbox->min());
g->setChildTransform(t);
} else {
g->setChildTransform(Geom::identity());
}
}
}
Inkscape::DrawingItem* SPUse::show(Inkscape::Drawing &drawing, unsigned int key, unsigned int flags) {
Inkscape::DrawingGroup *ai = new Inkscape::DrawingGroup(drawing);
ai->setPickChildren(false);
ai->setStyle(this->style);
if (this->child) {
Inkscape::DrawingItem *ac = this->child->invoke_show(drawing, key, flags);
if (ac) {
ai->prependChild(ac);
}
Geom::Translate t(this->x.computed, this->y.computed);
ai->setChildTransform(t);
}
return ai;
}
/**
* Displays the SPRoot item on the drawing.
*/
static Inkscape::DrawingItem *
sp_root_show(SPItem *item, Inkscape::Drawing &drawing, unsigned int key, unsigned int flags)
{
SPRoot *root = SP_ROOT(item);
Inkscape::DrawingItem *ai;
if (((SPItemClass *) (parent_class))->show) {
ai = ((SPItemClass *) (parent_class))->show(item, drawing, key, flags);
if (ai) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(ai);
g->setChildTransform(root->c2p);
}
} else {
ai = NULL;
}
return ai;
}
Inkscape::DrawingItem* SPUse::show(Inkscape::Drawing &drawing, unsigned int key, unsigned int flags) {
// std::cout << "SPUse::show: " << (getId()?getId():"null") << std::endl;
Inkscape::DrawingGroup *ai = new Inkscape::DrawingGroup(drawing);
ai->setPickChildren(false);
this->context_style = this->style;
ai->setStyle(this->style, this->context_style);
if (this->child) {
Inkscape::DrawingItem *ac = this->child->invoke_show(drawing, key, flags);
if (ac) {
ai->prependChild(ac);
}
Geom::Translate t(this->x.computed, this->y.computed);
ai->setChildTransform(t);
}
return ai;
}
void SPUse::update(SPCtx *ctx, unsigned flags) {
// std::cout << "SPUse::update: " << (getId()?getId():"null") << std::endl;
SPItemCtx *ictx = (SPItemCtx *) ctx;
SPItemCtx cctx = *ictx;
unsigned childflags = flags;
if (flags & SP_OBJECT_MODIFIED_FLAG) {
childflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
}
childflags &= SP_OBJECT_MODIFIED_CASCADE;
/* Set up child viewport */
if (this->x.unit == SVGLength::PERCENT) {
this->x.computed = this->x.value * ictx->viewport.width();
}
if (this->y.unit == SVGLength::PERCENT) {
this->y.computed = this->y.value * ictx->viewport.height();
}
if (this->width.unit == SVGLength::PERCENT) {
this->width.computed = this->width.value * ictx->viewport.width();
}
if (this->height.unit == SVGLength::PERCENT) {
this->height.computed = this->height.value * ictx->viewport.height();
}
childflags &= ~SP_OBJECT_USER_MODIFIED_FLAG_B;
if (this->child) {
sp_object_ref(this->child);
// viewport is only changed if referencing a symbol or svg element
if( SP_IS_SYMBOL(this->child) || SP_IS_ROOT(this->child) ) {
cctx.viewport = Geom::Rect::from_xywh(0, 0, this->width.computed, this->height.computed);
cctx.i2vp = Geom::identity();
}
if (childflags || (this->child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
SPItem const *chi = dynamic_cast<SPItem const *>(child);
g_assert(chi != NULL);
cctx.i2doc = chi->transform * ictx->i2doc;
cctx.i2vp = chi->transform * ictx->i2vp;
this->child->updateDisplay((SPCtx *)&cctx, childflags);
}
sp_object_unref(this->child);
}
SPItem::update(ctx, flags);
if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
for (SPItemView *v = this->display; v != NULL; v = v->next) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
this->context_style = this->style;
g->setStyle(this->style, this->context_style);
}
}
/* As last step set additional transform of arena group */
for (SPItemView *v = this->display; v != NULL; v = v->next) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
Geom::Affine t(Geom::Translate(this->x.computed, this->y.computed));
g->setChildTransform(t);
}
}
void SPUse::update(SPCtx *ctx, unsigned flags) {
SPItemCtx *ictx = (SPItemCtx *) ctx;
SPItemCtx cctx = *ictx;
unsigned childflags = flags;
if (flags & SP_OBJECT_MODIFIED_FLAG) {
childflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
}
childflags &= SP_OBJECT_MODIFIED_CASCADE;
/* Set up child viewport */
if (this->x.unit == SVGLength::PERCENT) {
this->x.computed = this->x.value * ictx->viewport.width();
}
if (this->y.unit == SVGLength::PERCENT) {
this->y.computed = this->y.value * ictx->viewport.height();
}
if (this->width.unit == SVGLength::PERCENT) {
this->width.computed = this->width.value * ictx->viewport.width();
}
if (this->height.unit == SVGLength::PERCENT) {
this->height.computed = this->height.value * ictx->viewport.height();
}
cctx.viewport = Geom::Rect::from_xywh(0, 0, this->width.computed, this->height.computed);
cctx.i2vp = Geom::identity();
childflags &= ~SP_OBJECT_USER_MODIFIED_FLAG_B;
if (this->child) {
sp_object_ref(this->child);
if (childflags || (this->child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
SPItem const &chi = *SP_ITEM(this->child);
cctx.i2doc = chi.transform * ictx->i2doc;
cctx.i2vp = chi.transform * ictx->i2vp;
this->child->updateDisplay((SPCtx *)&cctx, childflags);
}
sp_object_unref(this->child);
}
SPItem::update(ctx, flags);
if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
for (SPItemView *v = this->display; v != NULL; v = v->next) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
g->setStyle(this->style);
}
}
/* As last step set additional transform of arena group */
for (SPItemView *v = this->display; v != NULL; v = v->next) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
Geom::Affine t(Geom::Translate(this->x.computed, this->y.computed));
g->setChildTransform(t);
}
}
/**
* This callback routine updates the SPRoot object when its attributes have been changed.
*/
static void sp_root_update(SPObject *object, SPCtx *ctx, guint flags)
{
SPRoot *root = SP_ROOT(object);
SPItemCtx *ictx = (SPItemCtx *) ctx;
/* fixme: This will be invoked too often (Lauris) */
/* fixme: We should calculate only if parent viewport has changed (Lauris) */
/* If position is specified as percentage, calculate actual values */
if (root->x.unit == SVGLength::PERCENT) {
root->x.computed = root->x.value * ictx->viewport.width();
}
if (root->y.unit == SVGLength::PERCENT) {
root->y.computed = root->y.value * ictx->viewport.height();
}
if (root->width.unit == SVGLength::PERCENT) {
root->width.computed = root->width.value * ictx->viewport.width();
}
if (root->height.unit == SVGLength::PERCENT) {
root->height.computed = root->height.value * ictx->viewport.height();
}
/* Create copy of item context */
SPItemCtx rctx = *ictx;
/* Calculate child to parent transformation */
root->c2p.setIdentity();
if (object->parent) {
/*
* fixme: I am not sure whether setting x and y does or does not
* fixme: translate the content of inner SVG.
* fixme: Still applying translation and setting viewport to width and
* fixme: height seems natural, as this makes the inner svg element
* fixme: self-contained. The spec is vague here.
*/
root->c2p = Geom::Affine(Geom::Translate(root->x.computed,
root->y.computed));
}
if (root->viewBox_set) {
double x, y, width, height;
/* Determine actual viewbox in viewport coordinates */
if (root->aspect_align == SP_ASPECT_NONE) {
x = 0.0;
y = 0.0;
width = root->width.computed;
height = root->height.computed;
} else {
double scalex, scaley, scale;
/* Things are getting interesting */
scalex = root->width.computed / root->viewBox.width();
scaley = root->height.computed / root->viewBox.height();
scale = (root->aspect_clip == SP_ASPECT_MEET) ? MIN(scalex, scaley) : MAX(scalex, scaley);
width = root->viewBox.width() * scale;
height = root->viewBox.height() * scale;
/* Now place viewbox to requested position */
/* todo: Use an array lookup to find the 0.0/0.5/1.0 coefficients,
as is done for dialogs/align.cpp. */
switch (root->aspect_align) {
case SP_ASPECT_XMIN_YMIN:
x = 0.0;
y = 0.0;
break;
case SP_ASPECT_XMID_YMIN:
x = 0.5 * (root->width.computed - width);
y = 0.0;
break;
case SP_ASPECT_XMAX_YMIN:
x = 1.0 * (root->width.computed - width);
y = 0.0;
break;
case SP_ASPECT_XMIN_YMID:
x = 0.0;
y = 0.5 * (root->height.computed - height);
break;
case SP_ASPECT_XMID_YMID:
x = 0.5 * (root->width.computed - width);
y = 0.5 * (root->height.computed - height);
break;
case SP_ASPECT_XMAX_YMID:
x = 1.0 * (root->width.computed - width);
y = 0.5 * (root->height.computed - height);
break;
case SP_ASPECT_XMIN_YMAX:
x = 0.0;
y = 1.0 * (root->height.computed - height);
break;
case SP_ASPECT_XMID_YMAX:
x = 0.5 * (root->width.computed - width);
y = 1.0 * (root->height.computed - height);
break;
case SP_ASPECT_XMAX_YMAX:
x = 1.0 * (root->width.computed - width);
y = 1.0 * (root->height.computed - height);
break;
default:
x = 0.0;
y = 0.0;
break;
}
}
/* Compose additional transformation from scale and position */
Geom::Scale const viewBox_length( root->viewBox.dimensions() );
Geom::Scale const new_length(width, height);
/* Append viewbox transformation */
/* TODO: The below looks suspicious to me (pjrm): I wonder whether the RHS
expression should have c2p at the beginning rather than at the end. Test it. */
root->c2p = Geom::Translate(-root->viewBox.min()) * ( new_length * viewBox_length.inverse() ) * Geom::Translate(x, y) * root->c2p;
}
rctx.i2doc = root->c2p * rctx.i2doc;
/* Initialize child viewport */
if (root->viewBox_set) {
rctx.viewport = root->viewBox;
} else {
/* fixme: I wonder whether this logic is correct (Lauris) */
Geom::Point minp(0,0);
if (object->parent) {
minp = Geom::Point(root->x.computed, root->y.computed);
}
rctx.viewport = Geom::Rect::from_xywh(minp[Geom::X], minp[Geom::Y], root->width.computed, root->height.computed);
}
rctx.i2vp = Geom::identity();
/* And invoke parent method */
if (((SPObjectClass *) (parent_class))->update)
((SPObjectClass *) (parent_class))->update(object, (SPCtx *) &rctx, flags);
/* As last step set additional transform of drawing group */
for (SPItemView *v = root->display; v != NULL; v = v->next) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
g->setChildTransform(root->c2p);
}
}