inkscape/src/sp-flowregion.cpp

	sp-flowregion.cpp revision 3160bbbab034cde9669d9dbe736bd834b9cb0352
#define __SP_FLOWREGION_C__

/*
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glibmm/i18n.h>

#include <xml/repr.h>
#include "display/curve.h"
#include "sp-shape.h"
#include "sp-text.h"
#include "sp-use.h"
#include "style.h"
#include "document.h"
#include "sp-title.h"
#include "sp-desc.h"

#include "sp-flowregion.h"

#include "display/canvas-bpath.h"


#include "livarot/Path.h"
#include "livarot/Shape.h"

static void sp_flowregion_class_init (SPFlowregionClass *klass);
static void sp_flowregion_init (SPFlowregion *group);
static void sp_flowregion_dispose (GObject *object);

static void sp_flowregion_child_added (SPObject * object, Inkscape::XML::Node * child, Inkscape::XML::Node * ref);
static void sp_flowregion_remove_child (SPObject * object, Inkscape::XML::Node * child);
static void sp_flowregion_update (SPObject *object, SPCtx *ctx, guint flags);
static void sp_flowregion_modified (SPObject *object, guint flags);
static Inkscape::XML::Node *sp_flowregion_write (SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);

static gchar * sp_flowregion_description (SPItem * item);

static SPItemClass * flowregion_parent_class;

static void sp_flowregionexclude_class_init (SPFlowregionExcludeClass *klass);
static void sp_flowregionexclude_init (SPFlowregionExclude *group);
static void sp_flowregionexclude_dispose (GObject *object);

static void sp_flowregionexclude_child_added (SPObject * object, Inkscape::XML::Node * child, Inkscape::XML::Node * ref);
static void sp_flowregionexclude_remove_child (SPObject * object, Inkscape::XML::Node * child);
static void sp_flowregionexclude_update (SPObject *object, SPCtx *ctx, guint flags);
static void sp_flowregionexclude_modified (SPObject *object, guint flags);
static Inkscape::XML::Node *sp_flowregionexclude_write (SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);

static gchar * sp_flowregionexclude_description (SPItem * item);

static SPItemClass * flowregionexclude_parent_class;


static void         GetDest(SPObject* child,Shape **computed);

GType
sp_flowregion_get_type (void)
{
    static GType group_type = 0;
    if (!group_type) {
        GTypeInfo group_info = {
            sizeof (SPFlowregionClass),
            NULL,   /* base_init */
            NULL,   /* base_finalize */
            (GClassInitFunc) sp_flowregion_class_init,
            NULL,   /* class_finalize */
            NULL,   /* class_data */
            sizeof (SPFlowregion),
            16, /* n_preallocs */
            (GInstanceInitFunc) sp_flowregion_init,
            NULL,   /* value_table */
        };
        group_type = g_type_register_static (SP_TYPE_ITEM, "SPFlowregion", &group_info, (GTypeFlags)0);
    }
    return group_type;
}

static void
sp_flowregion_class_init (SPFlowregionClass *klass)
{
    GObjectClass * object_class;
    SPObjectClass * sp_object_class;
    SPItemClass * item_class;

    object_class = (GObjectClass *) klass;
    sp_object_class = (SPObjectClass *) klass;
    item_class = (SPItemClass *) klass;

    flowregion_parent_class = (SPItemClass *)g_type_class_ref (SP_TYPE_ITEM);

    object_class->dispose = sp_flowregion_dispose;

    sp_object_class->child_added = sp_flowregion_child_added;
    sp_object_class->remove_child = sp_flowregion_remove_child;
    sp_object_class->update = sp_flowregion_update;
    sp_object_class->modified = sp_flowregion_modified;
    sp_object_class->write = sp_flowregion_write;

    item_class->description = sp_flowregion_description;
}

static void
sp_flowregion_init (SPFlowregion *group)
{
    new (&group->computed) std::vector<Shape*>;
}

static void
sp_flowregion_dispose(GObject *object)
{
    SPFlowregion *group=(SPFlowregion *)object;
    for (std::vector<Shape*>::iterator it = group->computed.begin() ; it != group->computed.end() ; it++)
        delete *it;
    group->computed.~vector<Shape*>();
}

static void
sp_flowregion_child_added (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
{
    SPItem *item;

    item = SP_ITEM (object);

    if (((SPObjectClass *) (flowregion_parent_class))->child_added)
        (* ((SPObjectClass *) (flowregion_parent_class))->child_added) (object, child, ref);

    object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}

/* fixme: hide (Lauris) */

static void
sp_flowregion_remove_child (SPObject * object, Inkscape::XML::Node * child)
{
    if (((SPObjectClass *) (flowregion_parent_class))->remove_child)
        (* ((SPObjectClass *) (flowregion_parent_class))->remove_child) (object, child);

    object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}


static void
sp_flowregion_update (SPObject *object, SPCtx *ctx, unsigned int flags)
{
    SPFlowregion *group;
    SPObject *child;
    SPItemCtx *ictx, cctx;
    GSList *l;

    group = SP_FLOWREGION (object);
    ictx = (SPItemCtx *) ctx;
    cctx = *ictx;

    if (((SPObjectClass *) (flowregion_parent_class))->update)
        ((SPObjectClass *) (flowregion_parent_class))->update (object, ctx, flags);

    if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
    flags &= SP_OBJECT_MODIFIED_CASCADE;

    l = NULL;
    for (child = object->first_child() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
        g_object_ref (G_OBJECT (child));
        l = g_slist_prepend (l, child);
    }
    l = g_slist_reverse (l);
    while (l) {
        child = SP_OBJECT (l->data);
        l = g_slist_remove (l, child);
        if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
            if (SP_IS_ITEM (child)) {
                SPItem const &chi = *SP_ITEM(child);
                cctx.i2doc = chi.transform * ictx->i2doc;
                cctx.i2vp = chi.transform * ictx->i2vp;
                child->updateDisplay((SPCtx *)&cctx, flags);
            } else {
                child->updateDisplay(ctx, flags);
            }
        }
        g_object_unref (G_OBJECT (child));
    }

    group->UpdateComputed();
}

void             SPFlowregion::UpdateComputed(void)
{
    SPObject* object=SP_OBJECT(this);

    for (std::vector<Shape*>::iterator it = computed.begin() ; it != computed.end() ; it++)
        delete *it;
    computed.clear();

    for (SPObject* child = object->first_child() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
        Shape *shape = NULL;
        GetDest(child,&shape);
        computed.push_back(shape);
    }
}

static void
sp_flowregion_modified (SPObject *object, guint flags)
{
    SPFlowregion *group;
    SPObject *child;
    GSList *l;

    group = SP_FLOWREGION (object);

    if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
    flags &= SP_OBJECT_MODIFIED_CASCADE;

    l = NULL;
    for (child = object->first_child() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
        g_object_ref (G_OBJECT (child));
        l = g_slist_prepend (l, child);
    }
    l = g_slist_reverse (l);
    while (l) {
        child = SP_OBJECT (l->data);
        l = g_slist_remove (l, child);
        if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
            child->emitModified(flags);
        }
        g_object_unref (G_OBJECT (child));
    }
}

static Inkscape::XML::Node *
sp_flowregion_write (SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
{
    if (flags & SP_OBJECT_WRITE_BUILD) {
    if ( repr == NULL ) {
            repr = xml_doc->createElement("svg:flowRegion");
    }

        GSList *l = NULL;
        for ( SPObject *child = object->first_child() ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            if (SP_IS_TITLE(child) || SP_IS_DESC(child)) continue;
            Inkscape::XML::Node *crepr = child->updateRepr(xml_doc, NULL, flags);
            if (crepr) l = g_slist_prepend(l, crepr);
        }

        while (l) {
            repr->addChild((Inkscape::XML::Node *) l->data, NULL);
            Inkscape::GC::release((Inkscape::XML::Node *) l->data);
            l = g_slist_remove(l, l->data);
        }

    } else {
        for ( SPObject *child = object->first_child() ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            if (SP_IS_TITLE(child) || SP_IS_DESC(child)) continue;
            child->updateRepr(flags);
        }
    }

    if (((SPObjectClass *) (flowregion_parent_class))->write)
        ((SPObjectClass *) (flowregion_parent_class))->write (object, xml_doc, repr, flags);

    return repr;
}


static gchar *sp_flowregion_description(SPItem */*item*/)
{
    // TRANSLATORS: "Flow region" is an area where text is allowed to flow
    return g_strdup_printf(_("Flow region"));
}

/*
 *
 */

GType
sp_flowregionexclude_get_type (void)
{
    static GType group_type = 0;
    if (!group_type) {
        GTypeInfo group_info = {
            sizeof (SPFlowregionExcludeClass),
            NULL,   /* base_init */
            NULL,   /* base_finalize */
            (GClassInitFunc) sp_flowregionexclude_class_init,
            NULL,   /* class_finalize */
            NULL,   /* class_data */
            sizeof (SPFlowregionExclude),
            16, /* n_preallocs */
            (GInstanceInitFunc) sp_flowregionexclude_init,
            NULL,   /* value_table */
        };
        group_type = g_type_register_static (SP_TYPE_ITEM, "SPFlowregionExclude", &group_info, (GTypeFlags)0);
    }
    return group_type;
}

static void
sp_flowregionexclude_class_init (SPFlowregionExcludeClass *klass)
{
    GObjectClass * object_class;
    SPObjectClass * sp_object_class;
    SPItemClass * item_class;

    object_class = (GObjectClass *) klass;
    sp_object_class = (SPObjectClass *) klass;
    item_class = (SPItemClass *) klass;

    flowregionexclude_parent_class = (SPItemClass *)g_type_class_ref (SP_TYPE_ITEM);

    object_class->dispose = sp_flowregionexclude_dispose;

    sp_object_class->child_added = sp_flowregionexclude_child_added;
    sp_object_class->remove_child = sp_flowregionexclude_remove_child;
    sp_object_class->update = sp_flowregionexclude_update;
    sp_object_class->modified = sp_flowregionexclude_modified;
    sp_object_class->write = sp_flowregionexclude_write;

    item_class->description = sp_flowregionexclude_description;
}

static void
sp_flowregionexclude_init (SPFlowregionExclude *group)
{
    group->computed = NULL;
}

static void
sp_flowregionexclude_dispose(GObject *object)
{
    SPFlowregionExclude *group=(SPFlowregionExclude *)object;
    if (group->computed) {
        delete group->computed;
        group->computed = NULL;
    }
}

static void
sp_flowregionexclude_child_added (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
{
    SPItem *item;

    item = SP_ITEM (object);

    if (((SPObjectClass *) (flowregionexclude_parent_class))->child_added)
        (* ((SPObjectClass *) (flowregionexclude_parent_class))->child_added) (object, child, ref);

    object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}

/* fixme: hide (Lauris) */

static void
sp_flowregionexclude_remove_child (SPObject * object, Inkscape::XML::Node * child)
{
    if (((SPObjectClass *) (flowregionexclude_parent_class))->remove_child)
        (* ((SPObjectClass *) (flowregionexclude_parent_class))->remove_child) (object, child);

    object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}


static void
sp_flowregionexclude_update (SPObject *object, SPCtx *ctx, unsigned int flags)
{
    SPFlowregionExclude *group;
    SPObject *child;
    SPItemCtx *ictx, cctx;
    GSList *l;

    group = SP_FLOWREGIONEXCLUDE (object);
    ictx = (SPItemCtx *) ctx;
    cctx = *ictx;

    if (((SPObjectClass *) (flowregionexclude_parent_class))->update)
        ((SPObjectClass *) (flowregionexclude_parent_class))->update (object, ctx, flags);

    if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
    flags &= SP_OBJECT_MODIFIED_CASCADE;

    l = NULL;
    for (child = object->first_child() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
        g_object_ref (G_OBJECT (child));
        l = g_slist_prepend (l, child);
    }
    l = g_slist_reverse (l);
    while (l) {
        child = SP_OBJECT (l->data);
        l = g_slist_remove (l, child);
        if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
            if (SP_IS_ITEM (child)) {
                SPItem const &chi = *SP_ITEM(child);
                cctx.i2doc = chi.transform * ictx->i2doc;
                cctx.i2vp = chi.transform * ictx->i2vp;
                child->updateDisplay((SPCtx *)&cctx, flags);
            } else {
                child->updateDisplay(ctx, flags);
            }
        }
        g_object_unref (G_OBJECT (child));
    }

    group->UpdateComputed();
}
void             SPFlowregionExclude::UpdateComputed(void)
{
    SPObject* object=SP_OBJECT(this);

    if (computed) {
        delete computed;
        computed = NULL;
    }

    for (SPObject* child = object->first_child() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
        GetDest(child,&computed);
    }
}

static void
sp_flowregionexclude_modified (SPObject *object, guint flags)
{
    SPFlowregionExclude *group;
    SPObject *child;
    GSList *l;

    group = SP_FLOWREGIONEXCLUDE (object);

    if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
    flags &= SP_OBJECT_MODIFIED_CASCADE;

    l = NULL;
    for (child = object->first_child() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
        g_object_ref (G_OBJECT (child));
        l = g_slist_prepend (l, child);
    }
    l = g_slist_reverse (l);
    while (l) {
        child = SP_OBJECT (l->data);
        l = g_slist_remove (l, child);
        if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
            child->emitModified(flags);
        }
        g_object_unref (G_OBJECT (child));
    }
}

static Inkscape::XML::Node *
sp_flowregionexclude_write (SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
{
    if (flags & SP_OBJECT_WRITE_BUILD) {
        if ( repr == NULL ) {
            repr = xml_doc->createElement("svg:flowRegionExclude");
    }

        GSList *l = NULL;
        for ( SPObject *child = object->first_child() ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            Inkscape::XML::Node *crepr = child->updateRepr(xml_doc, NULL, flags);
            if (crepr) l = g_slist_prepend(l, crepr);
        }

        while (l) {
            repr->addChild((Inkscape::XML::Node *) l->data, NULL);
            Inkscape::GC::release((Inkscape::XML::Node *) l->data);
            l = g_slist_remove(l, l->data);
        }

    } else {
        for ( SPObject *child = object->first_child() ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            child->updateRepr(flags);
        }
    }

    if (((SPObjectClass *) (flowregionexclude_parent_class))->write)
        ((SPObjectClass *) (flowregionexclude_parent_class))->write (object, xml_doc, repr, flags);

    return repr;
}


static gchar *sp_flowregionexclude_description(SPItem */*item*/)
{
    /* TRANSLATORS: A region "cut out of" a flow region; text is not allowed to flow inside the
     * flow excluded region.  flowRegionExclude in SVG 1.2: see
     * http://www.w3.org/TR/2004/WD-SVG12-20041027/flow.html#flowRegion-elem and
     * http://www.w3.org/TR/2004/WD-SVG12-20041027/flow.html#flowRegionExclude-elem. */
    return g_strdup_printf(_("Flow excluded region"));
}

/*
 *
 */

static void         UnionShape(Shape **base_shape, Shape const *add_shape)
{
    if (*base_shape == NULL)
        *base_shape = new Shape;
    if ( (*base_shape)->hasEdges() == false ) {
        (*base_shape)->Copy(const_cast<Shape*>(add_shape));
    } else if ( add_shape->hasEdges() ) {
        Shape* temp=new Shape;
        temp->Booleen(const_cast<Shape*>(add_shape), *base_shape, bool_op_union);
        delete *base_shape;
        *base_shape = temp;
    }
}

static void         GetDest(SPObject* child,Shape **computed)
{
    if ( child == NULL ) return;

    SPCurve *curve=NULL;
    Geom::Matrix tr_mat;

    SPObject* u_child=child;
    if ( SP_IS_USE(u_child) ) {
        u_child=SP_USE(u_child)->child;
        tr_mat = SP_ITEM(u_child)->getRelativeTransform(SP_OBJECT_PARENT(child));
    } else {
        tr_mat = SP_ITEM(u_child)->transform;
    }
    if ( SP_IS_SHAPE (u_child) ) {
        curve = SP_SHAPE (u_child)->getCurve ();
    } else if ( SP_IS_TEXT (u_child) ) {
    curve = SP_TEXT (u_child)->getNormalizedBpath ();
    }

    if ( curve ) {
        Path*   temp=new Path;
        temp->LoadPathVector(curve->get_pathvector(), tr_mat, true);
        Shape*  n_shp=new Shape;
        temp->Convert(0.25);
        temp->Fill(n_shp,0);
        Shape*  uncross=new Shape;
        SPStyle* style=SP_OBJECT_STYLE(u_child);
        if ( style && style->fill_rule.computed == SP_WIND_RULE_EVENODD ) {
            uncross->ConvertToShape(n_shp,fill_oddEven);
        } else {
            uncross->ConvertToShape(n_shp,fill_nonZero);
        }
        UnionShape(computed, uncross);
        delete uncross;
        delete n_shp;
        delete temp;
        curve->unref();
    } else {
//      printf("no curve\n");
    }
}