Move classes derived from SPObject to own directory.

A lot of header clean-up.

1 files changed, 1279 insertions, 0 deletions

diff --git a/src/object/sp-text.cpp b/src/object/sp-text.cpp
new file mode 100644
index 000000000..17723a5c9
--- /dev/null
+++ b/src/object/sp-text.cpp
@@ -0,0 +1,1279 @@
+/*
+ * SVG <text> and <tspan> implementation
+ *
+ * Author:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+/*
+ * fixme:
+ *
+ * These subcomponents should not be items, or alternately
+ * we have to invent set of flags to mark, whether standard
+ * attributes are applicable to given item (I even like this
+ * idea somewhat - Lauris)
+ *
+ */
+
+#include <2geom/affine.h>
+#include <libnrtype/FontFactory.h>
+#include <libnrtype/font-instance.h>
+
+#include <glibmm/i18n.h>
+#include <glibmm/regex.h>
+#include "svg/svg.h"
+#include "display/drawing-text.h"
+#include "attributes.h"
+#include "document.h"
+#include "preferences.h"
+#include "desktop.h"
+#include "sp-namedview.h"
+#include "inkscape.h"
+#include "xml/quote.h"
+#include "mod360.h"
+
+#include "sp-title.h"
+#include "sp-desc.h"
+#include "sp-text.h"
+
+#include "sp-shape.h"
+#include "sp-textpath.h"
+#include "sp-tref.h"
+#include "sp-tspan.h"
+
+#include "text-editing.h"
+
+// For SVG 2 text flow
+#include "livarot/Shape.h"
+#include "display/curve.h"
+
+/*#####################################################
+#  SPTEXT
+#####################################################*/
+SPText::SPText() : SPItem() {
+}
+
+SPText::~SPText() {
+}
+
+void SPText::build(SPDocument *doc, Inkscape::XML::Node *repr) {
+    this->readAttr( "x" );
+    this->readAttr( "y" );
+    this->readAttr( "dx" );
+    this->readAttr( "dy" );
+    this->readAttr( "rotate" );
+
+    // textLength and friends
+    this->readAttr( "textLength" );
+    this->readAttr( "lengthAdjust" );
+
+    SPItem::build(doc, repr);
+
+    this->readAttr( "sodipodi:linespacing" );    // has to happen after the styles are read
+}
+
+void SPText::release() {
+    SPItem::release();
+}
+
+void SPText::set(unsigned int key, const gchar* value) {
+    //std::cout << "SPText::set: " << sp_attribute_name( key ) << ": " << (value?value:"Null") << std::endl;
+
+    if (this->attributes.readSingleAttribute(key, value, style, &viewport)) {
+        this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+    } else {
+        switch (key) {
+            case SP_ATTR_SODIPODI_LINESPACING:
+                // convert deprecated tag to css... but only if 'line-height' missing.
+                if (value && !this->style->line_height.set) {
+                    this->style->line_height.set = TRUE;
+                    this->style->line_height.inherit = FALSE;
+                    this->style->line_height.normal = FALSE;
+                    this->style->line_height.unit = SP_CSS_UNIT_PERCENT;
+                    this->style->line_height.value = this->style->line_height.computed = sp_svg_read_percentage (value, 1.0);
+                }
+                // Remove deprecated attribute
+                this->getRepr()->setAttribute("sodipodi:linespacing", NULL);
+
+                this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
+                break;
+
+            default:
+                SPItem::set(key, value);
+                break;
+        }
+    }
+}
+
+void SPText::child_added(Inkscape::XML::Node *rch, Inkscape::XML::Node *ref) {
+    SPItem::child_added(rch, ref);
+
+    this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_CONTENT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
+}
+
+void SPText::remove_child(Inkscape::XML::Node *rch) {
+    SPItem::remove_child(rch);
+
+    this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_CONTENT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
+}
+
+
+void SPText::update(SPCtx *ctx, guint flags) {
+
+    unsigned childflags = (flags & SP_OBJECT_MODIFIED_CASCADE);
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        childflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+    }
+
+    // Create temporary list of children
+    std::vector<SPObject *> l;
+    for (auto& child: children) {
+        sp_object_ref(&child, this);
+        l.push_back(&child);
+    }
+
+    for (auto child:l) {
+        if (childflags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+            /* fixme: Do we need transform? */
+            child->updateDisplay(ctx, childflags);
+        }
+        sp_object_unref(child, this);
+    }
+
+    // update ourselves after updating children
+    SPItem::update(ctx, flags);
+
+    if (flags & ( SP_OBJECT_STYLE_MODIFIED_FLAG |
+                  SP_OBJECT_CHILD_MODIFIED_FLAG |
+                  SP_TEXT_LAYOUT_MODIFIED_FLAG   ) )
+    {
+
+        SPItemCtx const *ictx = reinterpret_cast<SPItemCtx const *>(ctx);
+
+        double const w = ictx->viewport.width();
+        double const h = ictx->viewport.height();
+        double const em = style->font_size.computed;
+        double const ex = 0.5 * em;  // fixme: get x height from pango or libnrtype.
+
+        attributes.update( em, ex, w, h );
+
+        // Set inline_size computed value if necessary (i.e. if unit is %).
+        if (style->inline_size.set) {
+            if (style->inline_size.unit == SP_CSS_UNIT_PERCENT) {
+                if (style->writing_mode.computed == SP_CSS_WRITING_MODE_LR_TB ||
+                    style->writing_mode.computed == SP_CSS_WRITING_MODE_RL_TB) {
+                    style->inline_size.computed = style->inline_size.value * ictx->viewport.width();
+                } else {
+                    style->inline_size.computed = style->inline_size.value * ictx->viewport.height();
+                }
+            }
+        }
+
+        /* fixme: It is not nice to have it here, but otherwise children content changes does not work */
+        /* fixme: Even now it may not work, as we are delayed */
+        /* fixme: So check modification flag everywhere immediate state is used */
+        this->rebuildLayout();
+
+        Geom::OptRect paintbox = this->geometricBounds();
+
+        for (SPItemView* v = this->display; v != NULL; v = v->next) {
+            Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
+            this->_clearFlow(g);
+            g->setStyle(this->style, this->parent->style);
+            // pass the bbox of the this this as paintbox (used for paintserver fills)
+            this->layout.show(g, paintbox);
+        }
+    }
+}
+
+void SPText::modified(guint flags) {
+//	SPItem::onModified(flags);
+
+    guint cflags = (flags & SP_OBJECT_MODIFIED_CASCADE);
+
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        cflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+    }
+
+    // FIXME: all that we need to do here is to call setStyle, to set the changed
+    // style, but there's no easy way to access the drawing glyphs or texts corresponding to a
+    // text this. Therefore we do here the same as in _update, that is, destroy all items
+    // and create new ones. This is probably quite wasteful.
+    if (flags & ( SP_OBJECT_STYLE_MODIFIED_FLAG )) {
+        Geom::OptRect paintbox = this->geometricBounds();
+
+        for (SPItemView* v = this->display; v != NULL; v = v->next) {
+            Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
+            this->_clearFlow(g);
+            g->setStyle(this->style, this->parent->style);
+            this->layout.show(g, paintbox);
+        }
+    }
+
+    // Create temporary list of children
+    std::vector<SPObject *> l;
+    for (auto& child: children) {
+        sp_object_ref(&child, this);
+        l.push_back(&child);
+    }
+
+    for (auto child:l) {
+        if (cflags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+            child->emitModified(cflags);
+        }
+        sp_object_unref(child, this);
+    }
+}
+
+Inkscape::XML::Node *SPText::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+    if (flags & SP_OBJECT_WRITE_BUILD) {
+        if (!repr) {
+            repr = xml_doc->createElement("svg:text");
+        }
+
+        std::vector<Inkscape::XML::Node *> l;
+
+        for (auto& child: children) {
+            if (SP_IS_TITLE(&child) || SP_IS_DESC(&child)) {
+                continue;
+            }
+
+            Inkscape::XML::Node *crepr = NULL;
+
+            if (SP_IS_STRING(&child)) {
+                crepr = xml_doc->createTextNode(SP_STRING(&child)->string.c_str());
+            } else {
+                crepr = child.updateRepr(xml_doc, NULL, flags);
+            }
+
+            if (crepr) {
+                l.push_back(crepr);
+            }
+        }
+
+        for (auto i=l.rbegin();i!=l.rend();++i) {
+            repr->addChild(*i, NULL);
+            Inkscape::GC::release(*i);
+        }
+    } else {
+        for (auto& child: children) {
+            if (SP_IS_TITLE(&child) || SP_IS_DESC(&child)) {
+                continue;
+            }
+
+            if (SP_IS_STRING(&child)) {
+                child.getRepr()->setContent(SP_STRING(&child)->string.c_str());
+            } else {
+                child.updateRepr(flags);
+            }
+        }
+    }
+
+    this->attributes.writeTo(repr);
+    this->rebuildLayout();  // copied from update(), see LP Bug 1339305
+
+    SPItem::write(xml_doc, repr, flags);
+
+    return repr;
+}
+
+Geom::OptRect SPText::bbox(Geom::Affine const &transform, SPItem::BBoxType type) const {
+    Geom::OptRect bbox = SP_TEXT(this)->layout.bounds(transform);
+
+    // FIXME this code is incorrect
+    if (bbox && type == SPItem::VISUAL_BBOX && !this->style->stroke.isNone()) {
+        double scale = transform.descrim();
+        bbox->expandBy(0.5 * this->style->stroke_width.computed * scale);
+    }
+
+    return bbox;
+}
+
+Inkscape::DrawingItem* SPText::show(Inkscape::Drawing &drawing, unsigned /*key*/, unsigned /*flags*/) {
+    Inkscape::DrawingGroup *flowed = new Inkscape::DrawingGroup(drawing);
+    flowed->setPickChildren(false);
+    flowed->setStyle(this->style, this->parent->style);
+
+    // pass the bbox of the text object as paintbox (used for paintserver fills)
+    this->layout.show(flowed, this->geometricBounds());
+
+    return flowed;
+}
+
+
+void SPText::hide(unsigned int key) {
+    for (SPItemView* v = this->display; v != NULL; v = v->next) {
+        if (v->key == key) {
+            Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
+            this->_clearFlow(g);
+        }
+    }
+}
+
+const char* SPText::displayName() const {
+    return _("Text");
+}
+
+gchar* SPText::description() const {
+
+    SPStyle *style = this->style;
+
+    char *n = xml_quote_strdup( style->font_family.value );
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    int unit = prefs->getInt("/options/font/unitType", SP_CSS_UNIT_PT);
+    Inkscape::Util::Quantity q = Inkscape::Util::Quantity(style->font_size.computed, "px");
+    q.quantity *= this->i2doc_affine().descrim();
+    Glib::ustring xs = q.string(sp_style_get_css_unit_string(unit));
+
+    char const *trunc = "";
+    Inkscape::Text::Layout const *layout = te_get_layout((SPItem *) this);
+
+    if (layout && layout->inputTruncated()) {
+        trunc = _(" [truncated]");
+    }
+
+    char *ret = ( SP_IS_TEXT_TEXTPATH(this)
+      ? g_strdup_printf(_("on path%s (%s, %s)"), trunc, n, xs.c_str())
+      : g_strdup_printf(_("%s (%s, %s)"),        trunc, n, xs.c_str()) );
+    return ret;
+}
+
+void SPText::snappoints(std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs) const {
+    if (snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_TEXT_BASELINE)) {
+        // Choose a point on the baseline for snapping from or to, with the horizontal position
+        // of this point depending on the text alignment (left vs. right)
+        Inkscape::Text::Layout const *layout = te_get_layout(this);
+
+        if (layout != NULL && layout->outputExists()) {
+            boost::optional<Geom::Point> pt = layout->baselineAnchorPoint();
+
+            if (pt) {
+                p.push_back(Inkscape::SnapCandidatePoint((*pt) * this->i2dt_affine(), Inkscape::SNAPSOURCE_TEXT_ANCHOR, Inkscape::SNAPTARGET_TEXT_ANCHOR));
+            }
+        }
+    }
+}
+
+Geom::Affine SPText::set_transform(Geom::Affine const &xform) {
+    // we cannot optimize textpath because changing its fontsize will break its match to the path
+    if (SP_IS_TEXT_TEXTPATH (this)) {
+        if (!this->_optimizeTextpathText) {
+            return xform;
+        } else {
+            this->_optimizeTextpathText = false;
+        }
+    }
+
+    // we cannot optimize text with textLength because it may show different size than specified
+    if (this->attributes.getTextLength()->_set)
+        return xform;
+
+    /* This function takes care of scaling & translation only, we return whatever parts we can't
+       handle. */
+
+// TODO: pjrm tried to use fontsize_expansion(xform) here and it works for text in that font size
+// is scaled more intuitively when scaling non-uniformly; however this necessitated using
+// fontsize_expansion instead of expansion in other places too, where it was not appropriate
+// (e.g. it broke stroke width on copy/pasting of style from horizontally stretched to vertically
+// stretched shape). Using fontsize_expansion only here broke setting the style via font
+// dialog. This needs to be investigated further.
+    double const ex = xform.descrim();
+    if (ex == 0) {
+        return xform;
+    }
+
+    Geom::Affine ret(Geom::Affine(xform).withoutTranslation());
+    ret[0] /= ex;
+    ret[1] /= ex;
+    ret[2] /= ex;
+    ret[3] /= ex;
+
+    // Adjust x/y, dx/dy
+    this->_adjustCoordsRecursive (this, xform * ret.inverse(), ex);
+
+    // Adjust font size
+    this->_adjustFontsizeRecursive (this, ex);
+
+    // Adjust stroke width
+    this->adjust_stroke_width_recursive (ex);
+
+    // Adjust pattern fill
+    this->adjust_pattern(xform * ret.inverse());
+
+    // Adjust gradient fill
+    this->adjust_gradient(xform * ret.inverse());
+
+    this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
+
+    return ret;
+}
+
+void SPText::print(SPPrintContext *ctx) {
+    Geom::OptRect pbox, bbox, dbox;
+    pbox = this->geometricBounds();
+    bbox = this->desktopVisualBounds();
+    dbox = Geom::Rect::from_xywh(Geom::Point(0,0), this->document->getDimensions());
+
+    Geom::Affine const ctm (this->i2dt_affine());
+
+    this->layout.print(ctx,pbox,dbox,bbox,ctm);
+}
+
+/*
+ * Member functions
+ */
+
+unsigned SPText::_buildLayoutInput(SPObject *root, Inkscape::Text::Layout::OptionalTextTagAttrs const &parent_optional_attrs, unsigned parent_attrs_offset, bool in_textpath)
+{
+    unsigned length = 0;
+    int child_attrs_offset = 0;
+    Inkscape::Text::Layout::OptionalTextTagAttrs optional_attrs;
+
+    // To do: follow SPItem clip_ref/mask_ref code
+    if (style->shape_inside.set ) {
+
+        // Find union of all exclusion shapes
+        Shape *exclusion_shape;
+        if(style->shape_subtract.set) {
+            exclusion_shape = _buildExclusionShape();
+        }
+
+        // Extract out shapes (a comma separated list of urls)
+        Glib::ustring shapeInside_value = style->shape_inside.value;
+        std::vector<Glib::ustring> shapes_url = Glib::Regex::split_simple(" ", shapeInside_value);
+        for (int i=0; i<shapes_url.size(); ++i) {
+            Glib::ustring shape_url = shapes_url.at(i);
+            if ( shape_url.compare(0,5,"url(#") != 0 || shape_url.compare(shape_url.size()-1,1,")") != 0 ){
+                std::cerr << "SPText::_buildLayoutInput(): Invalid shape-inside value: " << shape_url << std::endl;
+            } else {
+                shape_url.erase(0,5);
+                shape_url.erase(shape_url.size()-1,1);
+                std::cout << "SPText::_buildLayoutInput(): shape-inside: " << shape_url << std::endl;
+                SPShape *shape = dynamic_cast<SPShape *>(document->getObjectById( shape_url ));
+                if ( shape ) {
+
+                    // This code adapted from sp-flowregion.cpp: GetDest()
+                    if (!(shape->_curve)) {
+                        shape->set_shape();
+                    }
+                    SPCurve *curve = shape->getCurve();
+
+                    if ( curve ) {
+                        Path *temp = new Path;
+                        Path *padded = new Path;
+                        temp->LoadPathVector( curve->get_pathvector(), shape->transform, true );
+                        if( style->shape_padding.set ) {
+                            // std::cout << "  padding: " << style->shape_padding.computed << std::endl;
+                            temp->OutsideOutline ( padded, style->shape_padding.computed, join_round, butt_straight, 20.0 );
+                        } else {
+                            // std::cout << "  no padding" << std::endl;
+                            padded->Copy( temp );
+                        }
+                        padded->Convert( 0.25 );  // Convert to polyline
+                        Shape* sh = new Shape;
+                        padded->Fill( sh, 0 );
+                        // for( unsigned i = 0; i < temp->pts.size(); ++i ) {
+                        //   std::cout << " ........ " << temp->pts[i].p << std::endl;
+                        // }
+                        // std::cout << " ...... shape: " << sh->numberOfPoints() << std::endl;
+                        Shape *uncross = new Shape;
+                        uncross->ConvertToShape( sh );
+
+                        // Subtract exclusion shape
+                        if(style->shape_subtract.set) {
+                            Shape *copy = new Shape;
+                            if (exclusion_shape && exclusion_shape->hasEdges()) {
+                                copy->Booleen(uncross, const_cast<Shape*>(exclusion_shape), bool_op_diff);
+                            } else {
+                                copy->Copy(uncross);
+                            }
+                            layout.appendWrapShape( copy );
+                            //delete exclusion_shape;
+                            continue;
+                        }
+
+                        layout.appendWrapShape( uncross );
+
+                        delete temp;
+                        delete padded;
+                        delete sh;
+                        // delete uncross;
+                    } else {
+                        std::cerr << "SPText::_buildLayoutInput(): Failed to get curve." << std::endl;
+                    }
+                } else {
+                    std::cerr << "SPText::_buildLayoutInput(): Failed to find shape." << std::endl;
+                }
+            }
+        }
+    } else if (style->inline_size.set) {
+        // If both shape_inside and inline_size are set, shape_inside wins out.
+
+        // We construct a rectangle with one dimension set by the computed value of 'inline-size'
+        // and the other dimension set to infinity. Text is laid out starting at the 'x' and 'y'
+        // attribute values. This is handled elsewhere.
+
+        double inline_size = style->inline_size.computed;
+        unsigned mode      = style->writing_mode.computed;
+        unsigned anchor    = style->text_anchor.computed;
+        unsigned direction = style->direction.computed;
+
+        Geom::Rect frame;
+        if (mode == SP_CSS_WRITING_MODE_LR_TB ||
+            mode == SP_CSS_WRITING_MODE_RL_TB) {
+            // horizontal
+            frame = Geom::Rect::from_xywh(attributes.firstXY()[Geom::X], -100000, inline_size, 200000);
+            if (anchor == SP_CSS_TEXT_ANCHOR_MIDDLE) {
+                frame *= Geom::Translate (-inline_size/2.0, 0 );
+            } else if ( (direction == SP_CSS_DIRECTION_LTR && anchor == SP_CSS_TEXT_ANCHOR_END  ) ||
+                        (direction == SP_CSS_DIRECTION_RTL && anchor == SP_CSS_TEXT_ANCHOR_START) ) {
+                frame *= Geom::Translate (-inline_size, 0);
+            }
+        } else {
+            // vertical
+            frame = Geom::Rect::from_xywh(-100000, attributes.firstXY()[Geom::Y], 200000, inline_size);
+            if (anchor == SP_CSS_TEXT_ANCHOR_MIDDLE) {
+                frame *= Geom::Translate (0, -inline_size/2.0);
+            } else if (anchor == SP_CSS_TEXT_ANCHOR_END) {
+                frame *= Geom::Translate (0, -inline_size);
+            }
+        }
+        // std::cout << " inline_size frame: " << frame << std::endl;
+
+        Shape *shape = new Shape;
+        shape->Reset();
+        int v0 = shape->AddPoint(frame.corner(0));
+        int v1 = shape->AddPoint(frame.corner(1));
+        int v2 = shape->AddPoint(frame.corner(2));
+        int v3 = shape->AddPoint(frame.corner(3));
+        shape->AddEdge(v0, v1);
+        shape->AddEdge(v1, v2);
+        shape->AddEdge(v2, v3);
+        shape->AddEdge(v3, v0);
+        Shape *uncross = new Shape;
+        uncross->ConvertToShape( shape );
+
+        layout.appendWrapShape( uncross );
+
+        delete shape;
+    }
+
+    if (SP_IS_TEXT(root)) {
+        SP_TEXT(root)->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, true, true);
+
+        layout.strut.reset();
+        if (style) {
+
+            // Strut
+            font_instance *font = font_factory::Default()->FaceFromStyle( style );
+            if (font) {
+                font->FontMetrics(layout.strut.ascent, layout.strut.descent, layout.strut.xheight);
+                font->Unref();
+            }
+            layout.strut *= style->font_size.computed;
+            if (style->line_height.normal ) {
+                layout.strut.computeEffective( Inkscape::Text::Layout::LINE_HEIGHT_NORMAL ); 
+            } else if (style->line_height.unit == SP_CSS_UNIT_NONE) {
+                layout.strut.computeEffective( style->line_height.computed );
+            } else {
+                if( style->font_size.computed > 0.0 ) {
+                    layout.strut.computeEffective( style->line_height.computed/style->font_size.computed );
+                }
+            }
+
+            // SVG 2 Text wrapping
+            if (style->shape_inside.set) {
+                // 'x' and 'y' attributes are always ignored.
+                optional_attrs.x.clear();
+                optional_attrs.y.clear();
+            }
+            else if (style->inline_size.set) {
+                // For horizontal text:
+                //   'x' is used to calculate the left/right edges of the rectangle but is not
+                //   needed later. If not deleted here, it will cause an incorrect positioning
+                //   of the first line.
+                //   'y' is used to determine where the first line box is located and is needed
+                //   during the output stage.
+                // For vertical text:
+                //   Follow above but exchange 'x' and 'y'.
+                if (style->writing_mode.computed == SP_CSS_WRITING_MODE_LR_TB ||
+                    style->writing_mode.computed == SP_CSS_WRITING_MODE_RL_TB) {
+                    // Horizontal text
+                    optional_attrs.x.clear();
+                } else {
+                    // Vertical text
+                    optional_attrs.y.clear();
+                }
+            }
+
+        }
+
+        // set textLength on the entire layout, see note in TNG-Layout.h
+        if (SP_TEXT(root)->attributes.getTextLength()->_set) {
+            layout.textLength._set = true;
+            layout.textLength.value = SP_TEXT(root)->attributes.getTextLength()->value;
+            layout.textLength.computed = SP_TEXT(root)->attributes.getTextLength()->computed;
+            layout.textLength.unit = SP_TEXT(root)->attributes.getTextLength()->unit;
+            layout.lengthAdjust = (Inkscape::Text::Layout::LengthAdjust) SP_TEXT(root)->attributes.getLengthAdjust();
+        }
+    }
+    else if (SP_IS_TSPAN(root)) {
+        SPTSpan *tspan = SP_TSPAN(root);
+        // x, y attributes are stripped from some tspans marked with role="line" as we do our own line layout.
+        // This should be checked carefully, as it can undo line layout in imported SVG files.
+        bool use_xy = !in_textpath && (tspan->role == SP_TSPAN_ROLE_UNSPECIFIED || !tspan->attributes.singleXYCoordinates());
+        tspan->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, use_xy, true);
+    }
+    else if (SP_IS_TREF(root)) {
+        SP_TREF(root)->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, true, true);
+    }
+    else if (SP_IS_TEXTPATH(root)) {
+        in_textpath = true;
+        SP_TEXTPATH(root)->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, false, true);
+        optional_attrs.x.clear();
+        optional_attrs.y.clear();
+    }
+    else {
+        optional_attrs = parent_optional_attrs;
+        child_attrs_offset = parent_attrs_offset;
+    }
+
+    if (SP_IS_TSPAN(root)) {
+        if (SP_TSPAN(root)->role != SP_TSPAN_ROLE_UNSPECIFIED) {
+            // we need to allow the first line not to have role=line, but still set the source_cookie to the right value
+            SPObject *prev_object = root->getPrev();
+            if (prev_object && SP_IS_TSPAN(prev_object)) {
+                if (!layout.inputExists()) {
+                    layout.appendText("", prev_object->style, prev_object, &optional_attrs);
+                }
+                layout.appendControlCode(Inkscape::Text::Layout::PARAGRAPH_BREAK, prev_object);
+            }
+            if (!root->hasChildren()) {
+                layout.appendText("", root->style, root, &optional_attrs);
+            }
+            length++;     // interpreting line breaks as a character for the purposes of x/y/etc attributes
+                          // is a liberal interpretation of the svg spec, but a strict reading would mean
+                          // that if the first line is empty the second line would take its place at the
+                          // start position. Very confusing.
+            child_attrs_offset--;
+        }
+    }
+
+    for (auto& child: root->children) {
+        SPString *str = dynamic_cast<SPString *>(&child);
+        if (str) {
+            Glib::ustring const &string = str->string;
+            // std::cout << "  Appending: >" << string << "<" << std::endl;
+            layout.appendText(string, root->style, &child, &optional_attrs, child_attrs_offset + length);
+            length += string.length();
+        } else if (!sp_repr_is_meta_element(child.getRepr())) {
+            /*      ^^^^ XML Tree being directly used here while it shouldn't be.*/
+            length += _buildLayoutInput(&child, optional_attrs, child_attrs_offset + length, in_textpath);
+        }
+    }
+
+    return length;
+}
+
+Shape* SPText::_buildExclusionShape() const
+{
+    Shape *result = new Shape(); // Union of all exlusion shapes
+    Shape *shape_temp = new Shape();
+
+    Glib::ustring shapeSubtract_value = style->shape_subtract.value;
+
+    // Extract out shapes (a comma separated list of urls)
+    std::vector<Glib::ustring> shapes_url = Glib::Regex::split_simple(" ", shapeSubtract_value);
+
+    for(int i=0; i<shapes_url.size(); i++) {
+        Glib::ustring shape_url = shapes_url.at(i);
+        if ( shape_url.compare(0,5,"url(#") != 0 || shape_url.compare(shape_url.size()-1,1,")") != 0 ){
+                std::cerr << "SPText::_buildLayoutInput(): Invalid shape-inside value: " << shape_url << std::endl;
+        } else {
+            shape_url.erase(0,5);
+            shape_url.erase(shape_url.size()-1,1);
+            // std::cout << "SPText::_buildLayoutInput(): shape-inside: " << shape_url << std::endl;
+            SPShape *shape = dynamic_cast<SPShape *>(document->getObjectById( shape_url ));
+            if ( shape ) {
+                // This code adapted from sp-flowregion.cpp: GetDest()
+                if (!(shape->_curve)) {
+                    shape->set_shape();
+                }
+                SPCurve *curve = shape->getCurve();
+
+                if ( curve ) {
+                    Path *temp = new Path;
+                    Path *margin = new Path;
+                    temp->LoadPathVector( curve->get_pathvector(), shape->transform, true );
+
+                    if( shape->style->shape_margin.set ) {
+                        temp->OutsideOutline ( margin, -shape->style->shape_margin.computed, join_round, butt_straight, 20.0 );
+                    } else {
+                        margin->Copy( temp );
+                    }
+
+                    margin->Convert( 0.25 );  // Convert to polyline
+                    Shape* sh = new Shape;
+                    margin->Fill( sh, 0 );
+
+                    Shape *uncross = new Shape;
+                    uncross->ConvertToShape( sh );
+
+                    if (result->hasEdges()) {
+                        shape_temp->Booleen(result, uncross, bool_op_union);
+                        std::swap(result, shape_temp);
+                    } else {
+                        result->Copy(uncross);
+                    }
+                }
+            }
+        }
+    }
+    return result;
+}
+
+void SPText::rebuildLayout()
+{
+    layout.clear();
+    Inkscape::Text::Layout::OptionalTextTagAttrs optional_attrs;
+    _buildLayoutInput(this, optional_attrs, 0, false);
+    layout.calculateFlow();
+    for (auto& child: children) {
+        if (SP_IS_TEXTPATH(&child)) {
+            SPTextPath const *textpath = SP_TEXTPATH(&child);
+            if (textpath->originalPath != NULL) {
+#if DEBUG_TEXTLAYOUT_DUMPASTEXT
+                g_print("%s", layout.dumpAsText().c_str());
+#endif
+                layout.fitToPathAlign(textpath->startOffset, *textpath->originalPath);
+            }
+        }
+    }
+#if DEBUG_TEXTLAYOUT_DUMPASTEXT
+    g_print("%s", layout.dumpAsText().c_str());
+#endif
+
+    // set the x,y attributes on role:line spans
+    for (auto& child: children) {
+        if (SP_IS_TSPAN(&child)) {
+            SPTSpan *tspan = SP_TSPAN(&child);
+            if ( (tspan->role != SP_TSPAN_ROLE_UNSPECIFIED)
+                 && tspan->attributes.singleXYCoordinates() ) {
+                Inkscape::Text::Layout::iterator iter = layout.sourceToIterator(tspan);
+                Geom::Point anchor_point = layout.chunkAnchorPoint(iter);
+                tspan->attributes.setFirstXY(anchor_point);
+            }
+        }
+    }
+}
+
+
+void SPText::_adjustFontsizeRecursive(SPItem *item, double ex, bool is_root)
+{
+    SPStyle *style = item->style;
+
+    if (style && !Geom::are_near(ex, 1.0)) {
+        if (!style->font_size.set && is_root) {
+            style->font_size.set = 1;
+        }
+        style->font_size.type = SP_FONT_SIZE_LENGTH;
+        style->font_size.computed *= ex;
+        style->letter_spacing.computed *= ex;
+        style->word_spacing.computed *= ex;
+        if (style->line_height.unit != SP_CSS_UNIT_NONE &&
+            style->line_height.unit != SP_CSS_UNIT_PERCENT &&
+            style->line_height.unit != SP_CSS_UNIT_EM &&
+            style->line_height.unit != SP_CSS_UNIT_EX) {
+            // No unit on 'line-height' property has special behavior.
+            style->line_height.computed *= ex;
+        }
+        item->updateRepr();
+    }
+
+    for(auto& o: item->children) {
+        if (SP_IS_ITEM(&o))
+            _adjustFontsizeRecursive(SP_ITEM(&o), ex, false);
+    }
+}
+
+void SPText::_adjustCoordsRecursive(SPItem *item, Geom::Affine const &m, double ex, bool is_root)
+{
+    if (SP_IS_TSPAN(item))
+        SP_TSPAN(item)->attributes.transform(m, ex, ex, is_root);
+              // it doesn't matter if we change the x,y for role=line spans because we'll just overwrite them anyway
+    else if (SP_IS_TEXT(item))
+        SP_TEXT(item)->attributes.transform(m, ex, ex, is_root);
+    else if (SP_IS_TEXTPATH(item))
+        SP_TEXTPATH(item)->attributes.transform(m, ex, ex, is_root);
+    else if (SP_IS_TREF(item)) {
+        SP_TREF(item)->attributes.transform(m, ex, ex, is_root);
+    }
+
+    for(auto& o: item->children) {
+        if (SP_IS_ITEM(&o))
+            _adjustCoordsRecursive(SP_ITEM(&o), m, ex, false);
+    }
+}
+
+
+void SPText::_clearFlow(Inkscape::DrawingGroup *in_arena)
+{
+    in_arena->clearChildren();
+}
+
+
+/*
+ * TextTagAttributes implementation
+ */
+
+// Not used.
+// void TextTagAttributes::readFrom(Inkscape::XML::Node const *node)
+// {
+//     readSingleAttribute(SP_ATTR_X, node->attribute("x"));
+//     readSingleAttribute(SP_ATTR_Y, node->attribute("y"));
+//     readSingleAttribute(SP_ATTR_DX, node->attribute("dx"));
+//     readSingleAttribute(SP_ATTR_DY, node->attribute("dy"));
+//     readSingleAttribute(SP_ATTR_ROTATE, node->attribute("rotate"));
+//     readSingleAttribute(SP_ATTR_TEXTLENGTH, node->attribute("textLength"));
+//     readSingleAttribute(SP_ATTR_LENGTHADJUST, node->attribute("lengthAdjust"));
+// }
+
+bool TextTagAttributes::readSingleAttribute(unsigned key, gchar const *value, SPStyle const *style, Geom::Rect const *viewport)
+{
+    // std::cout << "TextTagAttributes::readSingleAttribute: key: " << key
+    //           << "  value: " << (value?value:"Null") << std::endl;
+    std::vector<SVGLength> *attr_vector;
+    bool update_x = false;
+    bool update_y = false;
+    switch (key) {
+        case SP_ATTR_X:      attr_vector = &attributes.x;  update_x = true; break;
+        case SP_ATTR_Y:      attr_vector = &attributes.y;  update_y = true; break;
+        case SP_ATTR_DX:     attr_vector = &attributes.dx; update_x = true; break;
+        case SP_ATTR_DY:     attr_vector = &attributes.dy; update_y = true; break;
+        case SP_ATTR_ROTATE: attr_vector = &attributes.rotate; break;
+        case SP_ATTR_TEXTLENGTH:
+            attributes.textLength.readOrUnset(value);
+            return true;
+            break;
+        case SP_ATTR_LENGTHADJUST:
+            attributes.lengthAdjust = (value && !strcmp(value, "spacingAndGlyphs")?
+                                        Inkscape::Text::Layout::LENGTHADJUST_SPACINGANDGLYPHS :
+                                        Inkscape::Text::Layout::LENGTHADJUST_SPACING); // default is "spacing"
+            return true;
+            break;
+        default: return false;
+    }
+
+    // FIXME: sp_svg_length_list_read() amalgamates repeated separators. This prevents unset values.
+    *attr_vector = sp_svg_length_list_read(value);
+
+    if( (update_x || update_y) && style != NULL && viewport != NULL ) {
+        double const w = viewport->width();
+        double const h = viewport->height();
+        double const em = style->font_size.computed;
+        double const ex = em * 0.5;
+        for(std::vector<SVGLength>::iterator it = attr_vector->begin(); it != attr_vector->end(); ++it) {
+            if( update_x )
+                it->update( em, ex, w );
+            if( update_y )
+                it->update( em, ex, h );
+        }
+    }
+    return true;
+}
+
+void TextTagAttributes::writeTo(Inkscape::XML::Node *node) const
+{
+    writeSingleAttributeVector(node, "x", attributes.x);
+    writeSingleAttributeVector(node, "y", attributes.y);
+    writeSingleAttributeVector(node, "dx", attributes.dx);
+    writeSingleAttributeVector(node, "dy", attributes.dy);
+    writeSingleAttributeVector(node, "rotate", attributes.rotate);
+
+    writeSingleAttributeLength(node, "textLength", attributes.textLength);
+
+    if (attributes.textLength._set) {
+        if (attributes.lengthAdjust == Inkscape::Text::Layout::LENGTHADJUST_SPACING) {
+            node->setAttribute("lengthAdjust", "spacing");
+        } else if (attributes.lengthAdjust == Inkscape::Text::Layout::LENGTHADJUST_SPACINGANDGLYPHS) {
+            node->setAttribute("lengthAdjust", "spacingAndGlyphs");
+        }
+    }
+}
+
+void TextTagAttributes::update( double em, double ex, double w, double h )
+{
+    for(std::vector<SVGLength>::iterator it = attributes.x.begin(); it != attributes.x.end(); ++it) {
+        it->update( em, ex, w );
+    }
+    for(std::vector<SVGLength>::iterator it = attributes.y.begin(); it != attributes.y.end(); ++it) {
+        it->update( em, ex, h );
+    }
+    for(std::vector<SVGLength>::iterator it = attributes.dx.begin(); it != attributes.dx.end(); ++it) {
+        it->update( em, ex, w );
+    }
+    for(std::vector<SVGLength>::iterator it = attributes.dy.begin(); it != attributes.dy.end(); ++it) {
+        it->update( em, ex, h );
+    }
+}
+
+void TextTagAttributes::writeSingleAttributeLength(Inkscape::XML::Node *node, gchar const *key, const SVGLength &length)
+{
+    if (length._set) {
+        node->setAttribute(key, length.write().c_str());
+    } else
+        node->setAttribute(key, NULL);
+}
+
+void TextTagAttributes::writeSingleAttributeVector(Inkscape::XML::Node *node, gchar const *key, std::vector<SVGLength> const &attr_vector)
+{
+    if (attr_vector.empty())
+        node->setAttribute(key, NULL);
+    else {
+        Glib::ustring string;
+
+        // FIXME: this has no concept of unset values because sp_svg_length_list_read() can't read them back in
+        for (std::vector<SVGLength>::const_iterator it = attr_vector.begin() ; it != attr_vector.end() ; ++it) {
+            if (!string.empty()) string += ' ';
+            string += it->write();
+        }
+        node->setAttribute(key, string.c_str());
+    }
+}
+
+bool TextTagAttributes::singleXYCoordinates() const
+{
+    return attributes.x.size() <= 1 && attributes.y.size() <= 1;
+}
+
+bool TextTagAttributes::anyAttributesSet() const
+{
+    return !attributes.x.empty() || !attributes.y.empty() || !attributes.dx.empty() || !attributes.dy.empty() || !attributes.rotate.empty();
+}
+
+Geom::Point TextTagAttributes::firstXY() const
+{
+    Geom::Point point;
+    if (attributes.x.empty()) point[Geom::X] = 0.0;
+    else point[Geom::X] = attributes.x[0].computed;
+    if (attributes.y.empty()) point[Geom::Y] = 0.0;
+    else point[Geom::Y] = attributes.y[0].computed;
+    return point;
+}
+
+void TextTagAttributes::setFirstXY(Geom::Point &point)
+{
+    SVGLength zero_length;
+    zero_length = 0.0;
+
+    if (attributes.x.empty())
+        attributes.x.resize(1, zero_length);
+    if (attributes.y.empty())
+        attributes.y.resize(1, zero_length);
+    attributes.x[0] = point[Geom::X];
+    attributes.y[0] = point[Geom::Y];
+}
+
+void TextTagAttributes::mergeInto(Inkscape::Text::Layout::OptionalTextTagAttrs *output, Inkscape::Text::Layout::OptionalTextTagAttrs const &parent_attrs, unsigned parent_attrs_offset, bool copy_xy, bool copy_dxdyrotate) const
+{
+    mergeSingleAttribute(&output->x,      parent_attrs.x,      parent_attrs_offset, copy_xy ? &attributes.x : NULL);
+    mergeSingleAttribute(&output->y,      parent_attrs.y,      parent_attrs_offset, copy_xy ? &attributes.y : NULL);
+    mergeSingleAttribute(&output->dx,     parent_attrs.dx,     parent_attrs_offset, copy_dxdyrotate ? &attributes.dx : NULL);
+    mergeSingleAttribute(&output->dy,     parent_attrs.dy,     parent_attrs_offset, copy_dxdyrotate ? &attributes.dy : NULL);
+    mergeSingleAttribute(&output->rotate, parent_attrs.rotate, parent_attrs_offset, copy_dxdyrotate ? &attributes.rotate : NULL);
+    if (attributes.textLength._set) { // only from current node, this is not inherited from parent
+        output->textLength.value = attributes.textLength.value;
+        output->textLength.computed = attributes.textLength.computed;
+        output->textLength.unit = attributes.textLength.unit;
+        output->textLength._set = attributes.textLength._set;
+        output->lengthAdjust = attributes.lengthAdjust;
+    }
+}
+
+void TextTagAttributes::mergeSingleAttribute(std::vector<SVGLength> *output_list, std::vector<SVGLength> const &parent_list, unsigned parent_offset, std::vector<SVGLength> const *overlay_list)
+{
+    output_list->clear();
+    if (overlay_list == NULL) {
+        if (parent_list.size() > parent_offset)
+        {
+            output_list->reserve(parent_list.size() - parent_offset);
+            std::copy(parent_list.begin() + parent_offset, parent_list.end(), std::back_inserter(*output_list));
+        }
+    } else {
+        output_list->reserve(std::max((int)parent_list.size() - (int)parent_offset, (int)overlay_list->size()));
+        unsigned overlay_offset = 0;
+        while (parent_offset < parent_list.size() || overlay_offset < overlay_list->size()) {
+            SVGLength const *this_item;
+            if (overlay_offset < overlay_list->size()) {
+                this_item = &(*overlay_list)[overlay_offset];
+                overlay_offset++;
+                parent_offset++;
+            } else {
+                this_item = &parent_list[parent_offset];
+                parent_offset++;
+            }
+            output_list->push_back(*this_item);
+        }
+    }
+}
+
+void TextTagAttributes::erase(unsigned start_index, unsigned n)
+{
+    if (n == 0) return;
+    if (!singleXYCoordinates()) {
+        eraseSingleAttribute(&attributes.x, start_index, n);
+        eraseSingleAttribute(&attributes.y, start_index, n);
+    }
+    eraseSingleAttribute(&attributes.dx, start_index, n);
+    eraseSingleAttribute(&attributes.dy, start_index, n);
+    eraseSingleAttribute(&attributes.rotate, start_index, n);
+}
+
+void TextTagAttributes::eraseSingleAttribute(std::vector<SVGLength> *attr_vector, unsigned start_index, unsigned n)
+{
+    if (attr_vector->size() <= start_index) return;
+    if (attr_vector->size() <= start_index + n)
+        attr_vector->erase(attr_vector->begin() + start_index, attr_vector->end());
+    else
+        attr_vector->erase(attr_vector->begin() + start_index, attr_vector->begin() + start_index + n);
+}
+
+void TextTagAttributes::insert(unsigned start_index, unsigned n)
+{
+    if (n == 0) return;
+    if (!singleXYCoordinates()) {
+        insertSingleAttribute(&attributes.x, start_index, n, true);
+        insertSingleAttribute(&attributes.y, start_index, n, true);
+    }
+    insertSingleAttribute(&attributes.dx, start_index, n, false);
+    insertSingleAttribute(&attributes.dy, start_index, n, false);
+    insertSingleAttribute(&attributes.rotate, start_index, n, false);
+}
+
+void TextTagAttributes::insertSingleAttribute(std::vector<SVGLength> *attr_vector, unsigned start_index, unsigned n, bool is_xy)
+{
+    if (attr_vector->size() <= start_index) return;
+    SVGLength zero_length;
+    zero_length = 0.0;
+    attr_vector->insert(attr_vector->begin() + start_index, n, zero_length);
+    if (is_xy) {
+        double begin = start_index == 0 ? (*attr_vector)[start_index + n].computed : (*attr_vector)[start_index - 1].computed;
+        double diff = ((*attr_vector)[start_index + n].computed - begin) / n;   // n tested for nonzero in insert()
+        for (unsigned i = 0 ; i < n ; i++)
+            (*attr_vector)[start_index + i] = begin + diff * i;
+    }
+}
+
+void TextTagAttributes::split(unsigned index, TextTagAttributes *second)
+{
+    if (!singleXYCoordinates()) {
+        splitSingleAttribute(&attributes.x, index, &second->attributes.x, false);
+        splitSingleAttribute(&attributes.y, index, &second->attributes.y, false);
+    }
+    splitSingleAttribute(&attributes.dx, index, &second->attributes.dx, true);
+    splitSingleAttribute(&attributes.dy, index, &second->attributes.dy, true);
+    splitSingleAttribute(&attributes.rotate, index, &second->attributes.rotate, true);
+}
+
+void TextTagAttributes::splitSingleAttribute(std::vector<SVGLength> *first_vector, unsigned index, std::vector<SVGLength> *second_vector, bool trimZeros)
+{
+    second_vector->clear();
+    if (first_vector->size() <= index) return;
+    second_vector->resize(first_vector->size() - index);
+    std::copy(first_vector->begin() + index, first_vector->end(), second_vector->begin());
+    first_vector->resize(index);
+    if (trimZeros)
+        while (!first_vector->empty() && (!first_vector->back()._set || first_vector->back().value == 0.0))
+            first_vector->resize(first_vector->size() - 1);
+}
+
+void TextTagAttributes::join(TextTagAttributes const &first, TextTagAttributes const &second, unsigned second_index)
+{
+    if (second.singleXYCoordinates()) {
+        attributes.x = first.attributes.x;
+        attributes.y = first.attributes.y;
+    } else {
+        joinSingleAttribute(&attributes.x, first.attributes.x, second.attributes.x, second_index);
+        joinSingleAttribute(&attributes.y, first.attributes.y, second.attributes.y, second_index);
+    }
+    joinSingleAttribute(&attributes.dx, first.attributes.dx, second.attributes.dx, second_index);
+    joinSingleAttribute(&attributes.dy, first.attributes.dy, second.attributes.dy, second_index);
+    joinSingleAttribute(&attributes.rotate, first.attributes.rotate, second.attributes.rotate, second_index);
+}
+
+void TextTagAttributes::joinSingleAttribute(std::vector<SVGLength> *dest_vector, std::vector<SVGLength> const &first_vector, std::vector<SVGLength> const &second_vector, unsigned second_index)
+{
+    if (second_vector.empty())
+        *dest_vector = first_vector;
+    else {
+        dest_vector->resize(second_index + second_vector.size());
+        if (first_vector.size() < second_index) {
+            std::copy(first_vector.begin(), first_vector.end(), dest_vector->begin());
+            SVGLength zero_length;
+            zero_length = 0.0;
+            std::fill(dest_vector->begin() + first_vector.size(), dest_vector->begin() + second_index, zero_length);
+        } else
+            std::copy(first_vector.begin(), first_vector.begin() + second_index, dest_vector->begin());
+        std::copy(second_vector.begin(), second_vector.end(), dest_vector->begin() + second_index);
+    }
+}
+
+void TextTagAttributes::transform(Geom::Affine const &matrix, double scale_x, double scale_y, bool extend_zero_length)
+{
+    SVGLength zero_length;
+    zero_length = 0.0;
+
+    /* edge testcases for this code:
+       1) moving text elements whose position is done entirely with transform="...", no x,y attributes
+       2) unflowing multi-line flowtext then moving it (it has x but not y)
+    */
+    unsigned points_count = std::max(attributes.x.size(), attributes.y.size());
+    if (extend_zero_length && points_count < 1)
+        points_count = 1;
+    for (unsigned i = 0 ; i < points_count ; i++) {
+        Geom::Point point;
+        if (i < attributes.x.size()) point[Geom::X] = attributes.x[i].computed;
+        else point[Geom::X] = 0.0;
+        if (i < attributes.y.size()) point[Geom::Y] = attributes.y[i].computed;
+        else point[Geom::Y] = 0.0;
+        point *= matrix;
+        if (i < attributes.x.size())
+            attributes.x[i] = point[Geom::X];
+        else if (point[Geom::X] != 0.0 && extend_zero_length) {
+            attributes.x.resize(i + 1, zero_length);
+            attributes.x[i] = point[Geom::X];
+        }
+        if (i < attributes.y.size())
+            attributes.y[i] = point[Geom::Y];
+        else if (point[Geom::Y] != 0.0 && extend_zero_length) {
+            attributes.y.resize(i + 1, zero_length);
+            attributes.y[i] = point[Geom::Y];
+        }
+    }
+    for (std::vector<SVGLength>::iterator it = attributes.dx.begin() ; it != attributes.dx.end() ; ++it)
+        *it = it->computed * scale_x;
+    for (std::vector<SVGLength>::iterator it = attributes.dy.begin() ; it != attributes.dy.end() ; ++it)
+        *it = it->computed * scale_y;
+}
+
+double TextTagAttributes::getDx(unsigned index)
+{
+    if( attributes.dx.empty()) {
+        return 0.0;
+    }
+    if( index < attributes.dx.size() ) {
+        return attributes.dx[index].computed;
+    } else {
+        return 0.0; // attributes.dx.back().computed;
+    }
+}
+
+
+double TextTagAttributes::getDy(unsigned index)
+{
+    if( attributes.dy.empty() ) {
+        return 0.0;
+    }
+    if( index < attributes.dy.size() ) {
+        return attributes.dy[index].computed;
+    } else {
+        return 0.0; // attributes.dy.back().computed;
+    }
+}
+
+
+void TextTagAttributes::addToDx(unsigned index, double delta)
+{
+    SVGLength zero_length;
+    zero_length = 0.0;
+
+    if (attributes.dx.size() < index + 1) attributes.dx.resize(index + 1, zero_length);
+    attributes.dx[index] = attributes.dx[index].computed + delta;
+}
+
+void TextTagAttributes::addToDy(unsigned index, double delta)
+{
+    SVGLength zero_length;
+    zero_length = 0.0;
+
+    if (attributes.dy.size() < index + 1) attributes.dy.resize(index + 1, zero_length);
+    attributes.dy[index] = attributes.dy[index].computed + delta;
+}
+
+void TextTagAttributes::addToDxDy(unsigned index, Geom::Point const &adjust)
+{
+    SVGLength zero_length;
+    zero_length = 0.0;
+
+    if (adjust[Geom::X] != 0.0) {
+        if (attributes.dx.size() < index + 1) attributes.dx.resize(index + 1, zero_length);
+        attributes.dx[index] = attributes.dx[index].computed + adjust[Geom::X];
+    }
+    if (adjust[Geom::Y] != 0.0) {
+        if (attributes.dy.size() < index + 1) attributes.dy.resize(index + 1, zero_length);
+        attributes.dy[index] = attributes.dy[index].computed + adjust[Geom::Y];
+    }
+}
+
+double TextTagAttributes::getRotate(unsigned index)
+{
+    if( attributes.rotate.empty() ) {
+        return 0.0;
+    }
+    if( index < attributes.rotate.size() ) {
+        return attributes.rotate[index].computed;
+    } else {
+        return attributes.rotate.back().computed;
+    }
+}
+
+
+void TextTagAttributes::addToRotate(unsigned index, double delta)
+{
+    SVGLength zero_length;
+    zero_length = 0.0;
+
+    if (attributes.rotate.size() < index + 2) {
+        if (attributes.rotate.empty())
+            attributes.rotate.resize(index + 2, zero_length);
+        else
+            attributes.rotate.resize(index + 2, attributes.rotate.back());
+    }
+    attributes.rotate[index] = mod360(attributes.rotate[index].computed + delta);
+}
+
+
+void TextTagAttributes::setRotate(unsigned index, double angle)
+{
+    SVGLength zero_length;
+    zero_length = 0.0;
+
+    if (attributes.rotate.size() < index + 2) {
+        if (attributes.rotate.empty())
+            attributes.rotate.resize(index + 2, zero_length);
+        else
+            attributes.rotate.resize(index + 2, attributes.rotate.back());
+    }
+    attributes.rotate[index] = mod360(angle);
+}
+
+
+/*
+  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:fileencoding=utf-8:textwidth=99 :