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sp-flowregion.cpp

#define __SP_FLOWREGION_C__

/*
 */

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

#include <xml/repr.h>

#include "sp-object.h"
#include "sp-item.h"
#include "sp-shape.h"
#include "sp-text.h"
#include "sp-use.h"
#include "style.h"

#include "sp-flowregion.h"

#include "display/curve.h"
#include "display/canvas-bpath.h"

#include "libnr/nr-point.h"
#include "libnr/nr-matrix.h"
#include "libnr/nr-point-ops.h"
#include "libnr/nr-matrix-ops.h"
#include "libnr/nr-path.h"

#include "livarot/LivarotDefs.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::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::Node *repr, guint flags);

static gchar * sp_flowregionexclude_description (SPItem * item);

static SPItemClass * flowregionexclude_parent_class;


static void         GetDest(SPObject* child,Shape **computed,NR::Matrix itr_mat);

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 = sp_object_first_child(object) ; 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);
      
      NR::Matrix itr_mat=sp_item_i2root_affine (SP_ITEM(object));
      itr_mat=itr_mat.inverse();
      
    for (std::vector<Shape*>::iterator it = computed.begin() ; it != computed.end() ; it++)
        delete *it;
    computed.clear();
      
      for (SPObject* child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
        Shape *shape = NULL;
            GetDest(child,&shape,itr_mat);
        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 = sp_object_first_child(object) ; 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::Node *repr, guint flags)
{
    if (flags & SP_OBJECT_WRITE_BUILD) {
            if ( repr == NULL ) repr = sp_repr_new ("svg:flowRegion");
        
        GSList *l = NULL;
        for ( SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            Inkscape::XML::Node *crepr = child->updateRepr(NULL, flags);
            if (crepr) l = g_slist_prepend(l, crepr);
        }
        
        while (l) {
            sp_repr_add_child(repr, (Inkscape::XML::Node *) l->data, NULL);
            sp_repr_unref((Inkscape::XML::Node *) l->data);
            l = g_slist_remove(l, l->data);
        }
        
    } else {
        for ( SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            child->updateRepr(flags);
        }
    }

      if (((SPObjectClass *) (flowregion_parent_class))->write)
            ((SPObjectClass *) (flowregion_parent_class))->write (object, 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 = sp_object_first_child(object) ; 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;
    }
      NR::Matrix itr_mat=sp_item_i2root_affine (SP_ITEM(object));
      itr_mat=itr_mat.inverse();
      
      for (SPObject* child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
            GetDest(child,&computed,itr_mat);
      }
}

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 = sp_object_first_child(object) ; 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::Node *repr, guint flags)
{
    if (flags & SP_OBJECT_WRITE_BUILD) {
            if ( repr == NULL ) repr = sp_repr_new ("svg:flowRegionExclude");
        
        GSList *l = NULL;
        for ( SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            Inkscape::XML::Node *crepr = child->updateRepr(NULL, flags);
            if (crepr) l = g_slist_prepend(l, crepr);
        }
        
        while (l) {
            sp_repr_add_child(repr, (Inkscape::XML::Node *) l->data, NULL);
            sp_repr_unref((Inkscape::XML::Node *) l->data);
            l = g_slist_remove(l, l->data);
        }
        
    } else {
        for ( SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            child->updateRepr(flags);
        }
    }

      if (((SPObjectClass *) (flowregionexclude_parent_class))->write)
            ((SPObjectClass *) (flowregionexclude_parent_class))->write (object, 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,NR::Matrix itr_mat)
{     
      if ( child == NULL ) return;
      
      SPCurve *curve=NULL;
            
      SPObject* u_child=child;
      if ( SP_IS_USE(u_child) ) {
            u_child=SP_USE(u_child)->child;
      }
      if ( SP_IS_SHAPE (u_child) ) {
            curve = sp_shape_get_curve (SP_SHAPE (u_child));
      } else if ( SP_IS_TEXT (u_child) ) {
      curve = SP_TEXT (u_child)->getNormalizedBpath ();
      }
      
      if ( curve ) {
            Path*   temp=new Path;
            NR::Matrix tr_mat=sp_item_i2root_affine (SP_ITEM(u_child));
            tr_mat=itr_mat*tr_mat;
            temp->LoadArtBPath(curve->bpath,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;
            sp_curve_unref(curve);
      } else {
//          printf("no curve\n");
      }
}


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