#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <glibmm/i18n.h>

#include <cstring>

#include <string>

#include "attributes.h"

#include "xml/repr.h"

#include "style.h"

#include "inkscape.h"

#include "document.h"

#include "selection.h"

#include "desktop-handles.h"

#include "desktop.h"

#include "xml/repr.h"

#include "sp-flowdiv.h"

#include "sp-flowregion.h"

#include "sp-flowtext.h"

#include "sp-string.h"

#include "sp-use.h"

#include "sp-rect.h"

#include "text-tag-attributes.h"

#include "text-chemistry.h"

#include "text-editing.h"

#include "sp-text.h"

#include "livarot/Shape.h"

#include "display/drawing-text.h"

#include "sp-factory.h"

namespace {

SPObject* createFlowtext() {

return new SPFlowtext();

}

bool flowtextRegistered = SPFactory::instance().registerObject("svg:flowRoot", createFlowtext);

}

SPFlowtext::SPFlowtext() : SPItem() {

this->par_indent = 0;

//new (&this->layout) Inkscape::Text::Layout();

}

SPFlowtext::~SPFlowtext() {

//this->layout.~Layout();

}

void SPFlowtext::child_added(Inkscape::XML::Node* child, Inkscape::XML::Node* ref) {

SPItem::child_added(child, ref);

this->requestModified(SP_OBJECT_MODIFIED_FLAG);

}

void SPFlowtext::remove_child(Inkscape::XML::Node* child) {

SPItem::remove_child(child);

this->requestModified(SP_OBJECT_MODIFIED_FLAG);

}

void SPFlowtext::update(SPCtx* ctx, unsigned int flags) {

SPItemCtx *ictx = (SPItemCtx *) ctx;

SPItemCtx cctx = *ictx;

SPItem::update(ctx, 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))) {

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);

}

}

sp_object_unref(child);

}

this->rebuildLayout();

Geom::OptRect pbox = 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);

// pass the bbox of the flowtext object as paintbox (used for paintserver fills)

this->layout.show(g, pbox);

}

}

void SPFlowtext::modified(unsigned int flags) {

SPObject *region = NULL;

if (flags & SP_OBJECT_MODIFIED_FLAG) {

flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;

}

flags &= SP_OBJECT_MODIFIED_CASCADE;

// FIXME: the below stanza is copied over from sp_text_modified, consider factoring it out

if (flags & ( SP_OBJECT_STYLE_MODIFIED_FLAG )) {

SPFlowtext *text = SP_FLOWTEXT(this);

Geom::OptRect pbox = text->geometricBounds();

for (SPItemView* v = text->display; v != NULL; v = v->next) {

Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);

text->_clearFlow(g);

g->setStyle(this->style);

text->layout.show(g, pbox);

}

}

for ( SPObject *o = this->firstChild() ; o ; o = o->getNext() ) {

if (SP_IS_FLOWREGION(o)) {

region = o;

break;

}

}

if (region) {

if (flags || (region->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {

region->emitModified(flags); // pass down to the region only

}

}

}

void SPFlowtext::build(SPDocument* doc, Inkscape::XML::Node* repr) {

this->_requireSVGVersion(Inkscape::Version(1, 2));

SPItem::build(doc, repr);

this->readAttr( "inkscape:layoutOptions" ); // must happen after css has been read

}

void SPFlowtext::set(unsigned int key, const gchar* value) {

switch (key) {

case SP_ATTR_LAYOUT_OPTIONS: {

// deprecated attribute, read for backward compatibility only

//XML Tree being directly used while it shouldn't be.

SPCSSAttr *opts = sp_repr_css_attr(this->getRepr(), "inkscape:layoutOptions");

{

gchar const *val = sp_repr_css_property(opts, "justification", NULL);

if (val != NULL && !this->style->text_align.set) {

if ( strcmp(val, "0") == 0 || strcmp(val, "false") == 0 ) {

this->style->text_align.value = SP_CSS_TEXT_ALIGN_LEFT;

} else {

this->style->text_align.value = SP_CSS_TEXT_ALIGN_JUSTIFY;

}

this->style->text_align.set = TRUE;

this->style->text_align.inherit = FALSE;

this->style->text_align.computed = this->style->text_align.value;

}

}

/* no equivalent css attribute for these two (yet)

{ // This would probably translate to padding-left, if SPStyle had it.

gchar const *val = sp_repr_css_property(opts, "par-indent", NULL);

if ( val == NULL ) {

this->par_indent = 0.0;

} else {

this->par_indent = g_ascii_strtod(val, NULL);

}

}

sp_repr_css_attr_unref(opts);

this->requestModified(SP_OBJECT_MODIFIED_FLAG);

break;

}

default:

SPItem::set(key, value);

break;

}

}

Inkscape::XML::Node* SPFlowtext::write(Inkscape::XML::Document* doc, Inkscape::XML::Node* repr, guint flags) {

if ( flags & SP_OBJECT_WRITE_BUILD ) {

if ( repr == NULL ) {

repr = doc->createElement("svg:flowRoot");

}

GSList *l = NULL;

for (SPObject *child = this->firstChild() ; child ; child = child->getNext() ) {

Inkscape::XML::Node *c_repr = NULL;

if ( SP_IS_FLOWDIV(child) || SP_IS_FLOWPARA(child) || SP_IS_FLOWREGION(child) || SP_IS_FLOWREGIONEXCLUDE(child)) {

c_repr = child->updateRepr(doc, NULL, flags);

}

if ( c_repr ) {

l = g_slist_prepend(l, c_repr);

}

}

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 = this->firstChild() ; child ; child = child->getNext() ) {

if ( SP_IS_FLOWDIV(child) || SP_IS_FLOWPARA(child) || SP_IS_FLOWREGION(child) || SP_IS_FLOWREGIONEXCLUDE(child) ) {

child->updateRepr(flags);

}

}

}

SPItem::write(doc, repr, flags);

return repr;

}

Geom::OptRect SPFlowtext::bbox(Geom::Affine const &transform, SPItem::BBoxType type) {

Geom::OptRect bbox = this->layout.bounds(transform);

// Add stroke width

// 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;

}

void SPFlowtext::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);

}

const char* SPFlowtext::displayName() {

if (SP_FLOWTEXT(this)->has_internal_frame()) {

return _("Flowed Text");

} else {

return _("Linked Flowed Text");

}

}

gchar* SPFlowtext::description() {

Inkscape::Text::Layout const &layout = SP_FLOWTEXT(this)->layout;

int const nChars = layout.iteratorToCharIndex(layout.end());

char const *trunc = (layout.inputTruncated()) ? _(" [truncated]") : "";

return g_strdup_printf(ngettext(_("(%d character%s)"), _("(%d characters%s)"), nChars), nChars, trunc);

}

void SPFlowtext::snappoints(std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs) {

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((SPItem *) 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));

}

}

}

}

Inkscape::DrawingItem* SPFlowtext::show(Inkscape::Drawing &drawing, unsigned int key, unsigned int flags) {

Inkscape::DrawingGroup *flowed = new Inkscape::DrawingGroup(drawing);

flowed->setPickChildren(false);

flowed->setStyle(this->style);

// pass the bbox of the flowtext object as paintbox (used for paintserver fills)

Geom::OptRect bbox = this->geometricBounds();

this->layout.show(flowed, bbox);

return flowed;

}

void SPFlowtext::hide(unsigned int key) {

SPItem::hide(key);

}

void SPFlowtext::_buildLayoutInput(SPObject *root, Shape const *exclusion_shape, std::list<Shape> *shapes, SPObject **pending_line_break_object)

{

Inkscape::Text::Layout::OptionalTextTagAttrs pi;

bool with_indent = false;

if (SP_IS_FLOWPARA(root)) {

// emulate par-indent with the first char's kern

SPObject *t = root;

for ( ; t != NULL && !SP_IS_FLOWTEXT(t); t = t->parent){};

if (SP_IS_FLOWTEXT(t)) {

double indent = SP_FLOWTEXT(t)->par_indent;

if (indent != 0) {

with_indent = true;

SVGLength sl;

sl.value = sl.computed = indent;

sl._set = true;

pi.dx.push_back(sl);

}

}

}

if (*pending_line_break_object) {

if (SP_IS_FLOWREGIONBREAK(*pending_line_break_object)) {

layout.appendControlCode(Inkscape::Text::Layout::SHAPE_BREAK, *pending_line_break_object);

} else {

layout.appendControlCode(Inkscape::Text::Layout::PARAGRAPH_BREAK, *pending_line_break_object);

}

*pending_line_break_object = NULL;

}

for (SPObject *child = root->firstChild() ; child ; child = child->getNext() ) {

if (SP_IS_STRING(child)) {

if (*pending_line_break_object) {

if (SP_IS_FLOWREGIONBREAK(*pending_line_break_object))

layout.appendControlCode(Inkscape::Text::Layout::SHAPE_BREAK, *pending_line_break_object);

else {

layout.appendControlCode(Inkscape::Text::Layout::PARAGRAPH_BREAK, *pending_line_break_object);

}

*pending_line_break_object = NULL;

}

if (with_indent) {

layout.appendText(SP_STRING(child)->string, root->style, child, &pi);

} else {

layout.appendText(SP_STRING(child)->string, root->style, child);

}

} else if (SP_IS_FLOWREGION(child)) {

std::vector<Shape*> const &computed = SP_FLOWREGION(child)->computed;

for (std::vector<Shape*>::const_iterator it = computed.begin() ; it != computed.end() ; ++it) {

shapes->push_back(Shape());

if (exclusion_shape->hasEdges()) {

shapes->back().Booleen(*it, const_cast<Shape*>(exclusion_shape), bool_op_diff);

} else {

shapes->back().Copy(*it);

}

layout.appendWrapShape(&shapes->back());

}

}

//XML Tree is being directly used while it shouldn't be.

else if (!SP_IS_FLOWREGIONEXCLUDE(child) && !sp_repr_is_meta_element(child->getRepr())) {

_buildLayoutInput(child, exclusion_shape, shapes, pending_line_break_object);

}

}

if (SP_IS_FLOWDIV(root) || SP_IS_FLOWPARA(root) || SP_IS_FLOWREGIONBREAK(root) || SP_IS_FLOWLINE(root)) {

if (!root->hasChildren())

layout.appendText("", root->style, root);

*pending_line_break_object = root;

}

}

Shape* SPFlowtext::_buildExclusionShape() const

{

Shape *shape = new Shape();

Shape *shape_temp = new Shape();

for (SPObject *child = children ; child ; child = child->getNext() ) {

// RH: is it right that this shouldn't be recursive?

if ( SP_IS_FLOWREGIONEXCLUDE(child) ) {

SPFlowregionExclude *c_child = SP_FLOWREGIONEXCLUDE(child);

if ( c_child->computed && c_child->computed->hasEdges() ) {

if (shape->hasEdges()) {

shape_temp->Booleen(shape, c_child->computed, bool_op_union);

std::swap(shape, shape_temp);

} else {

shape->Copy(c_child->computed);

}

}

}

}

delete shape_temp;

return shape;

}

void SPFlowtext::rebuildLayout()

{

std::list<Shape> shapes;

layout.clear();

Shape *exclusion_shape = _buildExclusionShape();

SPObject *pending_line_break_object = NULL;

_buildLayoutInput(this, exclusion_shape, &shapes, &pending_line_break_object);

delete exclusion_shape;

layout.calculateFlow();

//g_print(layout.dumpAsText().c_str());

}

void SPFlowtext::_clearFlow(Inkscape::DrawingGroup *in_arena)

{

in_arena->clearChildren();

}

Inkscape::XML::Node *SPFlowtext::getAsText()

{

if (!this->layout.outputExists()) {

return NULL;

}

Inkscape::XML::Document *xml_doc = this->document->getReprDoc();

Inkscape::XML::Node *repr = xml_doc->createElement("svg:text");

repr->setAttribute("xml:space", "preserve");

repr->setAttribute("style", this->getRepr()->attribute("style"));

Geom::Point anchor_point = this->layout.characterAnchorPoint(this->layout.begin());

sp_repr_set_svg_double(repr, "x", anchor_point[Geom::X]);

sp_repr_set_svg_double(repr, "y", anchor_point[Geom::Y]);

for (Inkscape::Text::Layout::iterator it = this->layout.begin() ; it != this->layout.end() ; ) {

Inkscape::XML::Node *line_tspan = xml_doc->createElement("svg:tspan");

line_tspan->setAttribute("sodipodi:role", "line");

Inkscape::Text::Layout::iterator it_line_end = it;

it_line_end.nextStartOfLine();

while (it != it_line_end) {

Inkscape::XML::Node *span_tspan = xml_doc->createElement("svg:tspan");

Geom::Point anchor_point = this->layout.characterAnchorPoint(it);

// use kerning to simulate justification and whatnot

Inkscape::Text::Layout::iterator it_span_end = it;

it_span_end.nextStartOfSpan();

Inkscape::Text::Layout::OptionalTextTagAttrs attrs;

this->layout.simulateLayoutUsingKerning(it, it_span_end, &attrs);

// set x,y attributes only when we need to

bool set_x = false;

bool set_y = false;

if (!this->transform.isIdentity()) {

set_x = set_y = true;

} else {

Inkscape::Text::Layout::iterator it_chunk_start = it;

it_chunk_start.thisStartOfChunk();

if (it == it_chunk_start) {

set_x = true;

// don't set y so linespacing adjustments and things will still work

}

Inkscape::Text::Layout::iterator it_shape_start = it;

it_shape_start.thisStartOfShape();

if (it == it_shape_start)

set_y = true;

}

if (set_x && !attrs.dx.empty())

attrs.dx[0] = 0.0;

TextTagAttributes(attrs).writeTo(span_tspan);

if (set_x)

sp_repr_set_svg_double(span_tspan, "x", anchor_point[Geom::X]); // FIXME: this will pick up the wrong end of counter-directional runs

if (set_y)

sp_repr_set_svg_double(span_tspan, "y", anchor_point[Geom::Y]);

if (line_tspan->childCount() == 0) {

sp_repr_set_svg_double(line_tspan, "x", anchor_point[Geom::X]); // FIXME: this will pick up the wrong end of counter-directional runs

sp_repr_set_svg_double(line_tspan, "y", anchor_point[Geom::Y]);

}

SPObject *source_obj = 0;

void *rawptr = 0;

Glib::ustring::iterator span_text_start_iter;

this->layout.getSourceOfCharacter(it, &rawptr, &span_text_start_iter);

source_obj = SP_OBJECT (rawptr);

gchar *style_text = sp_style_write_difference((SP_IS_STRING(source_obj) ? source_obj->parent : source_obj)->style, this->style);

if (style_text && *style_text) {

span_tspan->setAttribute("style", style_text);

g_free(style_text);

}

if (SP_IS_STRING(source_obj)) {

Glib::ustring *string = &SP_STRING(source_obj)->string;

SPObject *span_end_obj = 0;

void *rawptr = 0;

Glib::ustring::iterator span_text_end_iter;

this->layout.getSourceOfCharacter(it_span_end, &rawptr, &span_text_end_iter);

span_end_obj = SP_OBJECT(rawptr);

if (span_end_obj != source_obj) {

if (it_span_end == this->layout.end()) {

span_text_end_iter = span_text_start_iter;

for (int i = this->layout.iteratorToCharIndex(it_span_end) - this->layout.iteratorToCharIndex(it) ; i ; --i)

++span_text_end_iter;

} else

span_text_end_iter = string->end(); // spans will never straddle a source boundary

}

if (span_text_start_iter != span_text_end_iter) {

Glib::ustring new_string;

while (span_text_start_iter != span_text_end_iter)

new_string += *span_text_start_iter++; // grr. no substr() with iterators

Inkscape::XML::Node *new_text = xml_doc->createTextNode(new_string.c_str());

span_tspan->appendChild(new_text);

Inkscape::GC::release(new_text);

}

}

it = it_span_end;

line_tspan->appendChild(span_tspan);

Inkscape::GC::release(span_tspan);

}

repr->appendChild(line_tspan);

Inkscape::GC::release(line_tspan);

}

return repr;

}

SPItem *SPFlowtext::get_frame(SPItem *after)

{

SPItem *frame = 0;

SPObject *region = 0;

for (SPObject *o = firstChild() ; o ; o = o->getNext() ) {

if (SP_IS_FLOWREGION(o)) {

region = o;

break;

}

}

if (region) {

bool past = false;

for (SPObject *o = region->firstChild() ; o ; o = o->getNext() ) {

if (SP_IS_ITEM(o)) {

if ( (after == NULL) || past ) {

frame = SP_ITEM(o);

} else {

if (SP_ITEM(o) == after) {

past = true;

}

}

}

}

if ( frame && SP_IS_USE(frame) ) {

frame = sp_use_get_original(SP_USE(frame));

}

}

return frame;

}

bool SPFlowtext::has_internal_frame()

{

SPItem *frame = get_frame(NULL);

return (frame && this->isAncestorOf(frame) && SP_IS_RECT(frame));

}

SPItem *create_flowtext_with_internal_frame (SPDesktop *desktop, Geom::Point p0, Geom::Point p1)

{

SPDocument *doc = sp_desktop_document (desktop);

Inkscape::XML::Document *xml_doc = doc->getReprDoc();

Inkscape::XML::Node *root_repr = xml_doc->createElement("svg:flowRoot");

root_repr->setAttribute("xml:space", "preserve"); // we preserve spaces in the text objects we create

SPItem *ft_item = SP_ITEM(desktop->currentLayer()->appendChildRepr(root_repr));

SPObject *root_object = doc->getObjectByRepr(root_repr);

g_assert(SP_IS_FLOWTEXT(root_object));

Inkscape::XML::Node *region_repr = xml_doc->createElement("svg:flowRegion");

root_repr->appendChild(region_repr);

SPObject *region_object = doc->getObjectByRepr(region_repr);

g_assert(SP_IS_FLOWREGION(region_object));

Inkscape::XML::Node *rect_repr = xml_doc->createElement("svg:rect"); // FIXME: use path!!! after rects are converted to use path

region_repr->appendChild(rect_repr);

SPRect *rect = SP_RECT(doc->getObjectByRepr(rect_repr));

p0 *= desktop->dt2doc();

p1 *= desktop->dt2doc();

using Geom::X;

using Geom::Y;

Geom::Coord const x0 = MIN(p0[X], p1[X]);

Geom::Coord const y0 = MIN(p0[Y], p1[Y]);

Geom::Coord const x1 = MAX(p0[X], p1[X]);

Geom::Coord const y1 = MAX(p0[Y], p1[Y]);

Geom::Coord const w = x1 - x0;

Geom::Coord const h = y1 - y0;

rect->setPosition(x0, y0, w, h);

rect->updateRepr();

Inkscape::XML::Node *para_repr = xml_doc->createElement("svg:flowPara");

root_repr->appendChild(para_repr);

SPObject *para_object = doc->getObjectByRepr(para_repr);

g_assert(SP_IS_FLOWPARA(para_object));

Inkscape::XML::Node *text = xml_doc->createTextNode("");

para_repr->appendChild(text);

Inkscape::GC::release(root_repr);

Inkscape::GC::release(region_repr);

Inkscape::GC::release(para_repr);

Inkscape::GC::release(rect_repr);

ft_item->transform = SP_ITEM(desktop->currentLayer())->i2doc_affine().inverse();

return ft_item;

}

Geom::Affine SPFlowtext::set_transform (Geom::Affine const &xform)

{

if ((this->_optimizeScaledText && !xform.withoutTranslation().isNonzeroUniformScale())

|| (!this->_optimizeScaledText && !xform.isNonzeroUniformScale())) {

this->_optimizeScaledText = false;

return xform;

}

this->_optimizeScaledText = false;

SPText *text = reinterpret_cast<SPText *>(this);

double const ex = xform.descrim();

if (ex == 0) {

return xform;

}

Geom::Affine ret(xform);

ret[0] /= ex;

ret[1] /= ex;

ret[2] /= ex;

ret[3] /= ex;

// Adjust font size

text->_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;

}