1 /*
2 * SVG <text> and <tspan> implementation
3 *
4 * Author:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 * bulia byak <buliabyak@users.sf.net>
7 *
8 * Copyright (C) 1999-2002 Lauris Kaplinski
9 * Copyright (C) 2000-2001 Ximian, Inc.
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 /*
15 * fixme:
16 *
17 * These subcomponents should not be items, or alternately
18 * we have to invent set of flags to mark, whether standard
19 * attributes are applicable to given item (I even like this
20 * idea somewhat - Lauris)
21 *
22 */
24 #ifdef HAVE_CONFIG_H
25 # include "config.h"
26 #endif
28 #include <2geom/matrix.h>
29 #include <libnr/nr-matrix-fns.h>
30 #include <libnrtype/FontFactory.h>
31 #include <libnrtype/font-instance.h>
32 #include <libnrtype/font-style-to-pos.h>
34 #include <glibmm/i18n.h>
35 #include "svg/svg.h"
36 #include "svg/stringstream.h"
37 #include "display/nr-arena-glyphs.h"
38 #include "attributes.h"
39 #include "document.h"
40 #include "desktop-handles.h"
41 #include "sp-namedview.h"
42 #include "style.h"
43 #include "inkscape.h"
44 #include "sp-metrics.h"
45 #include "xml/quote.h"
46 #include "xml/repr.h"
47 #include "mod360.h"
48 #include "sp-title.h"
49 #include "sp-desc.h"
51 #include "sp-textpath.h"
52 #include "sp-tref.h"
53 #include "sp-tspan.h"
55 #include "text-editing.h"
57 /*#####################################################
58 # SPTEXT
59 #####################################################*/
61 static void sp_text_class_init (SPTextClass *classname);
62 static void sp_text_init (SPText *text);
63 static void sp_text_release (SPObject *object);
65 static void sp_text_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
66 static void sp_text_set (SPObject *object, unsigned key, gchar const *value);
67 static void sp_text_child_added (SPObject *object, Inkscape::XML::Node *rch, Inkscape::XML::Node *ref);
68 static void sp_text_remove_child (SPObject *object, Inkscape::XML::Node *rch);
69 static void sp_text_update (SPObject *object, SPCtx *ctx, guint flags);
70 static void sp_text_modified (SPObject *object, guint flags);
71 static Inkscape::XML::Node *sp_text_write (SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
73 static void sp_text_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags);
74 static NRArenaItem *sp_text_show (SPItem *item, NRArena *arena, unsigned key, unsigned flags);
75 static void sp_text_hide (SPItem *item, unsigned key);
76 static char *sp_text_description (SPItem *item);
77 static void sp_text_snappoints(SPItem const *item, bool const target, SnapPointsWithType &p, Inkscape::SnapPreferences const *snapprefs);
78 static Geom::Matrix sp_text_set_transform(SPItem *item, Geom::Matrix const &xform);
79 static void sp_text_print (SPItem *item, SPPrintContext *gpc);
81 static SPItemClass *text_parent_class;
83 GType
84 sp_text_get_type ()
85 {
86 static GType type = 0;
87 if (!type) {
88 GTypeInfo info = {
89 sizeof (SPTextClass),
90 NULL, /* base_init */
91 NULL, /* base_finalize */
92 (GClassInitFunc) sp_text_class_init,
93 NULL, /* class_finalize */
94 NULL, /* class_data */
95 sizeof (SPText),
96 16, /* n_preallocs */
97 (GInstanceInitFunc) sp_text_init,
98 NULL, /* value_table */
99 };
100 type = g_type_register_static (SP_TYPE_ITEM, "SPText", &info, (GTypeFlags)0);
101 }
102 return type;
103 }
105 static void
106 sp_text_class_init (SPTextClass *classname)
107 {
108 SPObjectClass *sp_object_class = (SPObjectClass *) classname;
109 SPItemClass *item_class = (SPItemClass *) classname;
111 text_parent_class = (SPItemClass*)g_type_class_ref (SP_TYPE_ITEM);
113 sp_object_class->release = sp_text_release;
114 sp_object_class->build = sp_text_build;
115 sp_object_class->set = sp_text_set;
116 sp_object_class->child_added = sp_text_child_added;
117 sp_object_class->remove_child = sp_text_remove_child;
118 sp_object_class->update = sp_text_update;
119 sp_object_class->modified = sp_text_modified;
120 sp_object_class->write = sp_text_write;
122 item_class->bbox = sp_text_bbox;
123 item_class->show = sp_text_show;
124 item_class->hide = sp_text_hide;
125 item_class->description = sp_text_description;
126 item_class->snappoints = sp_text_snappoints;
127 item_class->set_transform = sp_text_set_transform;
128 item_class->print = sp_text_print;
129 }
131 static void
132 sp_text_init (SPText *text)
133 {
134 new (&text->layout) Inkscape::Text::Layout;
135 new (&text->attributes) TextTagAttributes;
136 }
138 static void
139 sp_text_release (SPObject *object)
140 {
141 SPText *text = SP_TEXT(object);
142 text->attributes.~TextTagAttributes();
143 text->layout.~Layout();
145 if (((SPObjectClass *) text_parent_class)->release)
146 ((SPObjectClass *) text_parent_class)->release(object);
147 }
149 static void
150 sp_text_build (SPObject *object, SPDocument *doc, Inkscape::XML::Node *repr)
151 {
152 sp_object_read_attr(object, "x");
153 sp_object_read_attr(object, "y");
154 sp_object_read_attr(object, "dx");
155 sp_object_read_attr(object, "dy");
156 sp_object_read_attr(object, "rotate");
158 if (((SPObjectClass *) text_parent_class)->build)
159 ((SPObjectClass *) text_parent_class)->build(object, doc, repr);
161 sp_object_read_attr(object, "sodipodi:linespacing"); // has to happen after the styles are read
162 }
164 static void
165 sp_text_set(SPObject *object, unsigned key, gchar const *value)
166 {
167 SPText *text = SP_TEXT (object);
169 if (text->attributes.readSingleAttribute(key, value)) {
170 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
171 } else {
172 switch (key) {
173 case SP_ATTR_SODIPODI_LINESPACING:
174 // convert deprecated tag to css
175 if (value) {
176 text->style->line_height.set = TRUE;
177 text->style->line_height.inherit = FALSE;
178 text->style->line_height.normal = FALSE;
179 text->style->line_height.unit = SP_CSS_UNIT_PERCENT;
180 text->style->line_height.value = text->style->line_height.computed = sp_svg_read_percentage (value, 1.0);
181 }
182 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
183 break;
184 default:
185 if (((SPObjectClass *) text_parent_class)->set)
186 ((SPObjectClass *) text_parent_class)->set (object, key, value);
187 break;
188 }
189 }
190 }
192 static void
193 sp_text_child_added (SPObject *object, Inkscape::XML::Node *rch, Inkscape::XML::Node *ref)
194 {
195 SPText *text = SP_TEXT (object);
197 if (((SPObjectClass *) text_parent_class)->child_added)
198 ((SPObjectClass *) text_parent_class)->child_added (object, rch, ref);
200 text->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_CONTENT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
201 }
203 static void
204 sp_text_remove_child (SPObject *object, Inkscape::XML::Node *rch)
205 {
206 SPText *text = SP_TEXT (object);
208 if (((SPObjectClass *) text_parent_class)->remove_child)
209 ((SPObjectClass *) text_parent_class)->remove_child (object, rch);
211 text->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_CONTENT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
212 }
214 static void
215 sp_text_update (SPObject *object, SPCtx *ctx, guint flags)
216 {
217 SPText *text = SP_TEXT (object);
219 if (((SPObjectClass *) text_parent_class)->update)
220 ((SPObjectClass *) text_parent_class)->update (object, ctx, flags);
222 guint cflags = (flags & SP_OBJECT_MODIFIED_CASCADE);
223 if (flags & SP_OBJECT_MODIFIED_FLAG) cflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
226 /* Create temporary list of children */
227 GSList *l = NULL;
228 for (SPObject *child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
229 sp_object_ref (SP_OBJECT (child), object);
230 l = g_slist_prepend (l, child);
231 }
232 l = g_slist_reverse (l);
233 while (l) {
234 SPObject *child = SP_OBJECT (l->data);
235 l = g_slist_remove (l, child);
236 if (cflags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
237 /* fixme: Do we need transform? */
238 child->updateDisplay(ctx, cflags);
239 }
240 sp_object_unref (SP_OBJECT (child), object);
241 }
242 if (flags & ( SP_OBJECT_STYLE_MODIFIED_FLAG |
243 SP_OBJECT_CHILD_MODIFIED_FLAG |
244 SP_TEXT_LAYOUT_MODIFIED_FLAG ) )
245 {
246 /* fixme: It is not nice to have it here, but otherwise children content changes does not work */
247 /* fixme: Even now it may not work, as we are delayed */
248 /* fixme: So check modification flag everywhere immediate state is used */
249 text->rebuildLayout();
251 NRRect paintbox;
252 sp_item_invoke_bbox(text, &paintbox, Geom::identity(), TRUE);
253 for (SPItemView* v = text->display; v != NULL; v = v->next) {
254 text->_clearFlow(NR_ARENA_GROUP(v->arenaitem));
255 nr_arena_group_set_style(NR_ARENA_GROUP(v->arenaitem), SP_OBJECT_STYLE(object));
256 // pass the bbox of the text object as paintbox (used for paintserver fills)
257 text->layout.show(NR_ARENA_GROUP(v->arenaitem), &paintbox);
258 }
259 }
260 }
262 static void
263 sp_text_modified (SPObject *object, guint flags)
264 {
265 if (((SPObjectClass *) text_parent_class)->modified)
266 ((SPObjectClass *) text_parent_class)->modified (object, flags);
268 guint cflags = (flags & SP_OBJECT_MODIFIED_CASCADE);
269 if (flags & SP_OBJECT_MODIFIED_FLAG) cflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
271 // FIXME: all that we need to do here is nr_arena_glyphs_[group_]set_style, to set the changed
272 // style, but there's no easy way to access the arena glyphs or glyph groups corresponding to a
273 // text object. Therefore we do here the same as in _update, that is, destroy all arena items
274 // and create new ones. This is probably quite wasteful.
275 if (flags & ( SP_OBJECT_STYLE_MODIFIED_FLAG )) {
276 SPText *text = SP_TEXT (object);
277 NRRect paintbox;
278 sp_item_invoke_bbox(text, &paintbox, Geom::identity(), TRUE);
279 for (SPItemView* v = text->display; v != NULL; v = v->next) {
280 text->_clearFlow(NR_ARENA_GROUP(v->arenaitem));
281 nr_arena_group_set_style(NR_ARENA_GROUP(v->arenaitem), SP_OBJECT_STYLE(object));
282 text->layout.show(NR_ARENA_GROUP(v->arenaitem), &paintbox);
283 }
284 }
286 /* Create temporary list of children */
287 GSList *l = NULL;
288 SPObject *child;
289 for (child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
290 sp_object_ref (SP_OBJECT (child), object);
291 l = g_slist_prepend (l, child);
292 }
293 l = g_slist_reverse (l);
294 while (l) {
295 child = SP_OBJECT (l->data);
296 l = g_slist_remove (l, child);
297 if (cflags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
298 child->emitModified(cflags);
299 }
300 sp_object_unref (SP_OBJECT (child), object);
301 }
302 }
304 static Inkscape::XML::Node *
305 sp_text_write (SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
306 {
307 SPText *text = SP_TEXT (object);
309 if (flags & SP_OBJECT_WRITE_BUILD) {
310 if (!repr)
311 repr = xml_doc->createElement("svg:text");
312 GSList *l = NULL;
313 for (SPObject *child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
314 if (SP_IS_TITLE(child) || SP_IS_DESC(child)) continue;
315 Inkscape::XML::Node *crepr = NULL;
316 if (SP_IS_STRING(child)) {
317 crepr = xml_doc->createTextNode(SP_STRING(child)->string.c_str());
318 } else {
319 crepr = child->updateRepr(xml_doc, NULL, flags);
320 }
321 if (crepr) l = g_slist_prepend (l, crepr);
322 }
323 while (l) {
324 repr->addChild((Inkscape::XML::Node *) l->data, NULL);
325 Inkscape::GC::release((Inkscape::XML::Node *) l->data);
326 l = g_slist_remove (l, l->data);
327 }
328 } else {
329 for (SPObject *child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
330 if (SP_IS_TITLE(child) || SP_IS_DESC(child)) continue;
331 if (SP_IS_STRING(child)) {
332 SP_OBJECT_REPR(child)->setContent(SP_STRING(child)->string.c_str());
333 } else {
334 child->updateRepr(flags);
335 }
336 }
337 }
339 text->attributes.writeTo(repr);
341 // deprecated attribute, but keep it around for backwards compatibility
342 if (text->style->line_height.set && !text->style->line_height.inherit && !text->style->line_height.normal && text->style->line_height.unit == SP_CSS_UNIT_PERCENT) {
343 Inkscape::SVGOStringStream os;
344 os << (text->style->line_height.value * 100.0) << "%";
345 SP_OBJECT_REPR(text)->setAttribute("sodipodi:linespacing", os.str().c_str());
346 }
347 else
348 SP_OBJECT_REPR(text)->setAttribute("sodipodi:linespacing", NULL);
350 if (((SPObjectClass *) (text_parent_class))->write)
351 ((SPObjectClass *) (text_parent_class))->write (object, xml_doc, repr, flags);
353 return repr;
354 }
356 static void
357 sp_text_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const /*flags*/)
358 {
359 SP_TEXT(item)->layout.getBoundingBox(bbox, transform);
361 // Add stroke width
362 SPStyle* style=SP_OBJECT_STYLE (item);
363 if (!style->stroke.isNone()) {
364 double const scale = transform.descrim();
365 if ( fabs(style->stroke_width.computed * scale) > 0.01 ) { // sinon c'est 0=oon veut pas de bord
366 double const width = MAX(0.125, style->stroke_width.computed * scale);
367 if ( fabs(bbox->x1 - bbox->x0) > -0.00001 && fabs(bbox->y1 - bbox->y0) > -0.00001 ) {
368 bbox->x0-=0.5*width;
369 bbox->x1+=0.5*width;
370 bbox->y0-=0.5*width;
371 bbox->y1+=0.5*width;
372 }
373 }
374 }
375 }
378 static NRArenaItem *
379 sp_text_show(SPItem *item, NRArena *arena, unsigned /* key*/, unsigned /*flags*/)
380 {
381 SPText *group = (SPText *) item;
383 NRArenaGroup *flowed = NRArenaGroup::create(arena);
384 nr_arena_group_set_transparent (flowed, FALSE);
386 nr_arena_group_set_style(flowed, group->style);
388 // pass the bbox of the text object as paintbox (used for paintserver fills)
389 NRRect paintbox;
390 sp_item_invoke_bbox(item, &paintbox, Geom::identity(), TRUE);
391 group->layout.show(flowed, &paintbox);
393 return flowed;
394 }
396 static void
397 sp_text_hide(SPItem *item, unsigned key)
398 {
399 if (((SPItemClass *) text_parent_class)->hide)
400 ((SPItemClass *) text_parent_class)->hide (item, key);
401 }
403 static char *
404 sp_text_description(SPItem *item)
405 {
406 SPText *text = (SPText *) item;
407 SPStyle *style = SP_OBJECT_STYLE(text);
409 font_instance *tf = font_factory::Default()->FaceFromStyle(style);
411 char name_buf[256];
412 char *n;
413 if (tf) {
414 tf->Name(name_buf, sizeof(name_buf));
415 n = xml_quote_strdup(name_buf);
416 tf->Unref();
417 } else {
418 /* TRANSLATORS: For description of font with no name. */
419 n = g_strdup(_("<no name found>"));
420 }
422 GString *xs = SP_PX_TO_METRIC_STRING(style->font_size.computed, sp_desktop_namedview(SP_ACTIVE_DESKTOP)->getDefaultMetric());
424 char *ret = ( SP_IS_TEXT_TEXTPATH(item)
425 ? g_strdup_printf(_("<b>Text on path</b> (%s, %s)"), n, xs->str)
426 : g_strdup_printf(_("<b>Text</b> (%s, %s)"), n, xs->str) );
427 g_free(n);
428 return ret;
429 }
431 static void sp_text_snappoints(SPItem const *item, bool const target, SnapPointsWithType &p, Inkscape::SnapPreferences const */*snapprefs*/)
432 {
433 // Choose a point on the baseline for snapping from or to, with the horizontal position
434 // of this point depending on the text alignment (left vs. right)
435 Inkscape::Text::Layout const *layout = te_get_layout((SPItem *) item);
436 if (layout != NULL && layout->outputExists()) {
437 boost::optional<Geom::Point> pt = layout->baselineAnchorPoint();
438 if (pt) {
439 int type = target ? int(Inkscape::SNAPTARGET_TEXT_BASELINE) : int(Inkscape::SNAPSOURCE_TEXT_BASELINE);
440 p.push_back(std::make_pair((*pt) * sp_item_i2d_affine(item), type));
441 }
442 }
443 }
445 static Geom::Matrix
446 sp_text_set_transform (SPItem *item, Geom::Matrix const &xform)
447 {
448 SPText *text = SP_TEXT(item);
450 // we cannot optimize textpath because changing its fontsize will break its match to the path
451 if (SP_IS_TEXT_TEXTPATH (text))
452 return xform;
454 /* This function takes care of scaling & translation only, we return whatever parts we can't
455 handle. */
457 // TODO: pjrm tried to use fontsize_expansion(xform) here and it works for text in that font size
458 // is scaled more intuitively when scaling non-uniformly; however this necessitated using
459 // fontsize_expansion instead of expansion in other places too, where it was not appropriate
460 // (e.g. it broke stroke width on copy/pasting of style from horizontally stretched to vertically
461 // stretched shape). Using fontsize_expansion only here broke setting the style via font
462 // dialog. This needs to be investigated further.
463 double const ex = xform.descrim();
464 if (ex == 0) {
465 return xform;
466 }
468 Geom::Matrix ret(Geom::Matrix(xform).without_translation());
469 ret[0] /= ex;
470 ret[1] /= ex;
471 ret[2] /= ex;
472 ret[3] /= ex;
474 // Adjust x/y, dx/dy
475 text->_adjustCoordsRecursive (item, xform * ret.inverse(), ex);
477 // Adjust font size
478 text->_adjustFontsizeRecursive (item, ex);
480 // Adjust stroke width
481 sp_item_adjust_stroke_width_recursive (item, ex);
483 // Adjust pattern fill
484 sp_item_adjust_pattern(item, xform * ret.inverse());
486 // Adjust gradient fill
487 sp_item_adjust_gradient(item, xform * ret.inverse());
489 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
491 return ret;
492 }
494 static void
495 sp_text_print (SPItem *item, SPPrintContext *ctx)
496 {
497 NRRect pbox, dbox, bbox;
498 SPText *group = SP_TEXT (item);
500 sp_item_invoke_bbox(item, &pbox, Geom::identity(), TRUE);
501 sp_item_bbox_desktop (item, &bbox);
502 dbox.x0 = 0.0;
503 dbox.y0 = 0.0;
504 dbox.x1 = sp_document_width (SP_OBJECT_DOCUMENT (item));
505 dbox.y1 = sp_document_height (SP_OBJECT_DOCUMENT (item));
506 Geom::Matrix const ctm (sp_item_i2d_affine(item));
508 group->layout.print(ctx,&pbox,&dbox,&bbox,ctm);
509 }
511 /*
512 * Member functions
513 */
515 unsigned SPText::_buildLayoutInput(SPObject *root, Inkscape::Text::Layout::OptionalTextTagAttrs const &parent_optional_attrs, unsigned parent_attrs_offset, bool in_textpath)
516 {
517 unsigned length = 0;
518 int child_attrs_offset = 0;
519 Inkscape::Text::Layout::OptionalTextTagAttrs optional_attrs;
521 if (SP_IS_TEXT(root)) {
522 SP_TEXT(root)->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, true, true);
523 }
524 else if (SP_IS_TSPAN(root)) {
525 SPTSpan *tspan = SP_TSPAN(root);
526 bool use_xy = !in_textpath && (tspan->role == SP_TSPAN_ROLE_UNSPECIFIED || !tspan->attributes.singleXYCoordinates());
527 tspan->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, use_xy, true);
528 }
529 else if (SP_IS_TREF(root)) {
530 SP_TREF(root)->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, true, true);
531 }
532 else if (SP_IS_TEXTPATH(root)) {
533 in_textpath = true;
534 SP_TEXTPATH(root)->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, false, true);
535 optional_attrs.x.clear();
536 optional_attrs.y.clear();
537 }
538 else {
539 optional_attrs = parent_optional_attrs;
540 child_attrs_offset = parent_attrs_offset;
541 }
543 if (SP_IS_TSPAN(root))
544 if (SP_TSPAN(root)->role != SP_TSPAN_ROLE_UNSPECIFIED) {
545 // we need to allow the first line not to have role=line, but still set the source_cookie to the right value
546 SPObject *prev_object = SP_OBJECT_PREV(root);
547 if (prev_object && SP_IS_TSPAN(prev_object)) {
548 if (!layout.inputExists())
549 layout.appendText("", prev_object->style, prev_object, &optional_attrs);
550 layout.appendControlCode(Inkscape::Text::Layout::PARAGRAPH_BREAK, prev_object);
551 }
552 if (!root->hasChildren())
553 layout.appendText("", root->style, root, &optional_attrs);
554 length++; // interpreting line breaks as a character for the purposes of x/y/etc attributes
555 // is a liberal interpretation of the svg spec, but a strict reading would mean
556 // that if the first line is empty the second line would take its place at the
557 // start position. Very confusing.
558 child_attrs_offset--;
559 }
561 for (SPObject *child = sp_object_first_child(root) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
562 if (SP_IS_STRING(child)) {
563 Glib::ustring const &string = SP_STRING(child)->string;
564 layout.appendText(string, root->style, child, &optional_attrs, child_attrs_offset + length);
565 length += string.length();
566 } else if (!sp_repr_is_meta_element(child->repr)) {
567 length += _buildLayoutInput(child, optional_attrs, child_attrs_offset + length, in_textpath);
568 }
569 }
571 return length;
572 }
574 void SPText::rebuildLayout()
575 {
576 layout.clear();
577 Inkscape::Text::Layout::OptionalTextTagAttrs optional_attrs;
578 _buildLayoutInput(this, optional_attrs, 0, false);
579 layout.calculateFlow();
580 for (SPObject *child = firstChild() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
581 if (SP_IS_TEXTPATH(child)) {
582 SPTextPath const *textpath = SP_TEXTPATH(child);
583 if (textpath->originalPath != NULL) {
584 //g_print(layout.dumpAsText().c_str());
585 layout.fitToPathAlign(textpath->startOffset, *textpath->originalPath);
586 }
587 }
588 }
589 //g_print(layout.dumpAsText().c_str());
591 // set the x,y attributes on role:line spans
592 for (SPObject *child = firstChild() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
593 if (!SP_IS_TSPAN(child)) continue;
594 SPTSpan *tspan = SP_TSPAN(child);
595 if (tspan->role == SP_TSPAN_ROLE_UNSPECIFIED) continue;
596 if (!tspan->attributes.singleXYCoordinates()) continue;
597 Inkscape::Text::Layout::iterator iter = layout.sourceToIterator(tspan);
598 Geom::Point anchor_point = layout.chunkAnchorPoint(iter);
599 tspan->attributes.setFirstXY(anchor_point);
600 }
601 }
604 void SPText::_adjustFontsizeRecursive(SPItem *item, double ex, bool is_root)
605 {
606 SPStyle *style = SP_OBJECT_STYLE (item);
608 if (style && !NR_DF_TEST_CLOSE (ex, 1.0, NR_EPSILON)) {
609 if (!style->font_size.set && is_root) {
610 style->font_size.set = 1;
611 }
612 style->font_size.type = SP_FONT_SIZE_LENGTH;
613 style->font_size.computed *= ex;
614 style->letter_spacing.computed *= ex;
615 style->word_spacing.computed *= ex;
616 item->updateRepr();
617 }
619 for (SPObject *o = item->children; o != NULL; o = o->next) {
620 if (SP_IS_ITEM(o))
621 _adjustFontsizeRecursive(SP_ITEM(o), ex, false);
622 }
623 }
625 void SPText::_adjustCoordsRecursive(SPItem *item, Geom::Matrix const &m, double ex, bool is_root)
626 {
627 if (SP_IS_TSPAN(item))
628 SP_TSPAN(item)->attributes.transform(m, ex, ex, is_root);
629 // it doesn't matter if we change the x,y for role=line spans because we'll just overwrite them anyway
630 else if (SP_IS_TEXT(item))
631 SP_TEXT(item)->attributes.transform(m, ex, ex, is_root);
632 else if (SP_IS_TEXTPATH(item))
633 SP_TEXTPATH(item)->attributes.transform(m, ex, ex, is_root);
634 else if (SP_IS_TREF(item)) {
635 SP_TREF(item)->attributes.transform(m, ex, ex, is_root);
636 }
638 for (SPObject *o = item->children; o != NULL; o = o->next) {
639 if (SP_IS_ITEM(o))
640 _adjustCoordsRecursive(SP_ITEM(o), m, ex, false);
641 }
642 }
645 void SPText::_clearFlow(NRArenaGroup *in_arena)
646 {
647 nr_arena_item_request_render (in_arena);
648 for (NRArenaItem *child = in_arena->children; child != NULL; ) {
649 NRArenaItem *nchild = child->next;
651 nr_arena_glyphs_group_clear(NR_ARENA_GLYPHS_GROUP(child));
652 nr_arena_item_remove_child (in_arena, child);
654 child=nchild;
655 }
656 }
659 /*
660 * TextTagAttributes implementation
661 */
663 void TextTagAttributes::readFrom(Inkscape::XML::Node const *node)
664 {
665 readSingleAttribute(SP_ATTR_X, node->attribute("x"));
666 readSingleAttribute(SP_ATTR_Y, node->attribute("y"));
667 readSingleAttribute(SP_ATTR_DX, node->attribute("dx"));
668 readSingleAttribute(SP_ATTR_DY, node->attribute("dy"));
669 readSingleAttribute(SP_ATTR_ROTATE, node->attribute("rotate"));
670 }
672 bool TextTagAttributes::readSingleAttribute(unsigned key, gchar const *value)
673 {
674 std::vector<SVGLength> *attr_vector;
675 switch (key) {
676 case SP_ATTR_X: attr_vector = &attributes.x; break;
677 case SP_ATTR_Y: attr_vector = &attributes.y; break;
678 case SP_ATTR_DX: attr_vector = &attributes.dx; break;
679 case SP_ATTR_DY: attr_vector = &attributes.dy; break;
680 case SP_ATTR_ROTATE: attr_vector = &attributes.rotate; break;
681 default: return false;
682 }
684 // FIXME: sp_svg_length_list_read() amalgamates repeated separators. This prevents unset values.
685 *attr_vector = sp_svg_length_list_read(value);
686 return true;
687 }
689 void TextTagAttributes::writeTo(Inkscape::XML::Node *node) const
690 {
691 writeSingleAttribute(node, "x", attributes.x);
692 writeSingleAttribute(node, "y", attributes.y);
693 writeSingleAttribute(node, "dx", attributes.dx);
694 writeSingleAttribute(node, "dy", attributes.dy);
695 writeSingleAttribute(node, "rotate", attributes.rotate);
696 }
698 void TextTagAttributes::writeSingleAttribute(Inkscape::XML::Node *node, gchar const *key, std::vector<SVGLength> const &attr_vector)
699 {
700 if (attr_vector.empty())
701 node->setAttribute(key, NULL);
702 else {
703 Glib::ustring string;
704 gchar single_value_string[32];
706 // FIXME: this has no concept of unset values because sp_svg_length_list_read() can't read them back in
707 for (std::vector<SVGLength>::const_iterator it = attr_vector.begin() ; it != attr_vector.end() ; it++) {
708 g_ascii_formatd(single_value_string, sizeof (single_value_string), "%.8g", it->computed);
709 if (!string.empty()) string += ' ';
710 string += single_value_string;
711 }
712 node->setAttribute(key, string.c_str());
713 }
714 }
716 bool TextTagAttributes::singleXYCoordinates() const
717 {
718 return attributes.x.size() <= 1 && attributes.y.size() <= 1;
719 }
721 bool TextTagAttributes::anyAttributesSet() const
722 {
723 return !attributes.x.empty() || !attributes.y.empty() || !attributes.dx.empty() || !attributes.dy.empty() || !attributes.rotate.empty();
724 }
726 Geom::Point TextTagAttributes::firstXY() const
727 {
728 Geom::Point point;
729 if (attributes.x.empty()) point[Geom::X] = 0.0;
730 else point[Geom::X] = attributes.x[0].computed;
731 if (attributes.y.empty()) point[Geom::Y] = 0.0;
732 else point[Geom::Y] = attributes.y[0].computed;
733 return point;
734 }
736 void TextTagAttributes::setFirstXY(Geom::Point &point)
737 {
738 SVGLength zero_length;
739 zero_length = 0.0;
741 if (attributes.x.empty())
742 attributes.x.resize(1, zero_length);
743 if (attributes.y.empty())
744 attributes.y.resize(1, zero_length);
745 attributes.x[0].computed = point[Geom::X];
746 attributes.y[0].computed = point[Geom::Y];
747 }
749 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
750 {
751 mergeSingleAttribute(&output->x, parent_attrs.x, parent_attrs_offset, copy_xy ? &attributes.x : NULL);
752 mergeSingleAttribute(&output->y, parent_attrs.y, parent_attrs_offset, copy_xy ? &attributes.y : NULL);
753 mergeSingleAttribute(&output->dx, parent_attrs.dx, parent_attrs_offset, copy_dxdyrotate ? &attributes.dx : NULL);
754 mergeSingleAttribute(&output->dy, parent_attrs.dy, parent_attrs_offset, copy_dxdyrotate ? &attributes.dy : NULL);
755 mergeSingleAttribute(&output->rotate, parent_attrs.rotate, parent_attrs_offset, copy_dxdyrotate ? &attributes.rotate : NULL);
756 }
758 void TextTagAttributes::mergeSingleAttribute(std::vector<SVGLength> *output_list, std::vector<SVGLength> const &parent_list, unsigned parent_offset, std::vector<SVGLength> const *overlay_list)
759 {
760 output_list->clear();
761 if (overlay_list == NULL) {
762 if (parent_list.size() > parent_offset)
763 {
764 output_list->reserve(parent_list.size() - parent_offset);
765 std::copy(parent_list.begin() + parent_offset, parent_list.end(), std::back_inserter(*output_list));
766 }
767 } else {
768 output_list->reserve(std::max((int)parent_list.size() - (int)parent_offset, (int)overlay_list->size()));
769 unsigned overlay_offset = 0;
770 while (parent_offset < parent_list.size() || overlay_offset < overlay_list->size()) {
771 SVGLength const *this_item;
772 if (overlay_offset < overlay_list->size()) {
773 this_item = &(*overlay_list)[overlay_offset];
774 overlay_offset++;
775 parent_offset++;
776 } else {
777 this_item = &parent_list[parent_offset];
778 parent_offset++;
779 }
780 output_list->push_back(*this_item);
781 }
782 }
783 }
785 void TextTagAttributes::erase(unsigned start_index, unsigned n)
786 {
787 if (n == 0) return;
788 if (!singleXYCoordinates()) {
789 eraseSingleAttribute(&attributes.x, start_index, n);
790 eraseSingleAttribute(&attributes.y, start_index, n);
791 }
792 eraseSingleAttribute(&attributes.dx, start_index, n);
793 eraseSingleAttribute(&attributes.dy, start_index, n);
794 eraseSingleAttribute(&attributes.rotate, start_index, n);
795 }
797 void TextTagAttributes::eraseSingleAttribute(std::vector<SVGLength> *attr_vector, unsigned start_index, unsigned n)
798 {
799 if (attr_vector->size() <= start_index) return;
800 if (attr_vector->size() <= start_index + n)
801 attr_vector->erase(attr_vector->begin() + start_index, attr_vector->end());
802 else
803 attr_vector->erase(attr_vector->begin() + start_index, attr_vector->begin() + start_index + n);
804 }
806 void TextTagAttributes::insert(unsigned start_index, unsigned n)
807 {
808 if (n == 0) return;
809 if (!singleXYCoordinates()) {
810 insertSingleAttribute(&attributes.x, start_index, n, true);
811 insertSingleAttribute(&attributes.y, start_index, n, true);
812 }
813 insertSingleAttribute(&attributes.dx, start_index, n, false);
814 insertSingleAttribute(&attributes.dy, start_index, n, false);
815 insertSingleAttribute(&attributes.rotate, start_index, n, false);
816 }
818 void TextTagAttributes::insertSingleAttribute(std::vector<SVGLength> *attr_vector, unsigned start_index, unsigned n, bool is_xy)
819 {
820 if (attr_vector->size() <= start_index) return;
821 SVGLength zero_length;
822 zero_length = 0.0;
823 attr_vector->insert(attr_vector->begin() + start_index, n, zero_length);
824 if (is_xy) {
825 double begin = start_index == 0 ? (*attr_vector)[start_index + n].computed : (*attr_vector)[start_index - 1].computed;
826 double diff = ((*attr_vector)[start_index + n].computed - begin) / n; // n tested for nonzero in insert()
827 for (unsigned i = 0 ; i < n ; i++)
828 (*attr_vector)[start_index + i] = begin + diff * i;
829 }
830 }
832 void TextTagAttributes::split(unsigned index, TextTagAttributes *second)
833 {
834 if (!singleXYCoordinates()) {
835 splitSingleAttribute(&attributes.x, index, &second->attributes.x, false);
836 splitSingleAttribute(&attributes.y, index, &second->attributes.y, false);
837 }
838 splitSingleAttribute(&attributes.dx, index, &second->attributes.dx, true);
839 splitSingleAttribute(&attributes.dy, index, &second->attributes.dy, true);
840 splitSingleAttribute(&attributes.rotate, index, &second->attributes.rotate, true);
841 }
843 void TextTagAttributes::splitSingleAttribute(std::vector<SVGLength> *first_vector, unsigned index, std::vector<SVGLength> *second_vector, bool trimZeros)
844 {
845 second_vector->clear();
846 if (first_vector->size() <= index) return;
847 second_vector->resize(first_vector->size() - index);
848 std::copy(first_vector->begin() + index, first_vector->end(), second_vector->begin());
849 first_vector->resize(index);
850 if (trimZeros)
851 while (!first_vector->empty() && (!first_vector->back()._set || first_vector->back().value == 0.0))
852 first_vector->resize(first_vector->size() - 1);
853 }
855 void TextTagAttributes::join(TextTagAttributes const &first, TextTagAttributes const &second, unsigned second_index)
856 {
857 if (second.singleXYCoordinates()) {
858 attributes.x = first.attributes.x;
859 attributes.y = first.attributes.y;
860 } else {
861 joinSingleAttribute(&attributes.x, first.attributes.x, second.attributes.x, second_index);
862 joinSingleAttribute(&attributes.y, first.attributes.y, second.attributes.y, second_index);
863 }
864 joinSingleAttribute(&attributes.dx, first.attributes.dx, second.attributes.dx, second_index);
865 joinSingleAttribute(&attributes.dy, first.attributes.dy, second.attributes.dy, second_index);
866 joinSingleAttribute(&attributes.rotate, first.attributes.rotate, second.attributes.rotate, second_index);
867 }
869 void TextTagAttributes::joinSingleAttribute(std::vector<SVGLength> *dest_vector, std::vector<SVGLength> const &first_vector, std::vector<SVGLength> const &second_vector, unsigned second_index)
870 {
871 if (second_vector.empty())
872 *dest_vector = first_vector;
873 else {
874 dest_vector->resize(second_index + second_vector.size());
875 if (first_vector.size() < second_index) {
876 std::copy(first_vector.begin(), first_vector.end(), dest_vector->begin());
877 SVGLength zero_length;
878 zero_length = 0.0;
879 std::fill(dest_vector->begin() + first_vector.size(), dest_vector->begin() + second_index, zero_length);
880 } else
881 std::copy(first_vector.begin(), first_vector.begin() + second_index, dest_vector->begin());
882 std::copy(second_vector.begin(), second_vector.end(), dest_vector->begin() + second_index);
883 }
884 }
886 void TextTagAttributes::transform(Geom::Matrix const &matrix, double scale_x, double scale_y, bool extend_zero_length)
887 {
888 SVGLength zero_length;
889 zero_length = 0.0;
891 /* edge testcases for this code:
892 1) moving text elements whose position is done entirely with transform="...", no x,y attributes
893 2) unflowing multi-line flowtext then moving it (it has x but not y)
894 */
895 unsigned points_count = std::max(attributes.x.size(), attributes.y.size());
896 if (extend_zero_length && points_count < 1)
897 points_count = 1;
898 for (unsigned i = 0 ; i < points_count ; i++) {
899 Geom::Point point;
900 if (i < attributes.x.size()) point[Geom::X] = attributes.x[i].computed;
901 else point[Geom::X] = 0.0;
902 if (i < attributes.y.size()) point[Geom::Y] = attributes.y[i].computed;
903 else point[Geom::Y] = 0.0;
904 point *= matrix;
905 if (i < attributes.x.size())
906 attributes.x[i] = point[Geom::X];
907 else if (point[Geom::X] != 0.0 && extend_zero_length) {
908 attributes.x.resize(i + 1, zero_length);
909 attributes.x[i] = point[Geom::X];
910 }
911 if (i < attributes.y.size())
912 attributes.y[i] = point[Geom::Y];
913 else if (point[Geom::Y] != 0.0 && extend_zero_length) {
914 attributes.y.resize(i + 1, zero_length);
915 attributes.y[i] = point[Geom::Y];
916 }
917 }
918 for (std::vector<SVGLength>::iterator it = attributes.dx.begin() ; it != attributes.dx.end() ; it++)
919 *it = it->computed * scale_x;
920 for (std::vector<SVGLength>::iterator it = attributes.dy.begin() ; it != attributes.dy.end() ; it++)
921 *it = it->computed * scale_y;
922 }
924 void TextTagAttributes::addToDxDy(unsigned index, Geom::Point const &adjust)
925 {
926 SVGLength zero_length;
927 zero_length = 0.0;
929 if (adjust[Geom::X] != 0.0) {
930 if (attributes.dx.size() < index + 1) attributes.dx.resize(index + 1, zero_length);
931 attributes.dx[index] = attributes.dx[index].computed + adjust[Geom::X];
932 }
933 if (adjust[Geom::Y] != 0.0) {
934 if (attributes.dy.size() < index + 1) attributes.dy.resize(index + 1, zero_length);
935 attributes.dy[index] = attributes.dy[index].computed + adjust[Geom::Y];
936 }
937 }
939 void TextTagAttributes::addToRotate(unsigned index, double delta)
940 {
941 SVGLength zero_length;
942 zero_length = 0.0;
944 if (attributes.rotate.size() < index + 2) {
945 if (attributes.rotate.empty())
946 attributes.rotate.resize(index + 2, zero_length);
947 else
948 attributes.rotate.resize(index + 2, attributes.rotate.back());
949 }
950 attributes.rotate[index] = mod360(attributes.rotate[index].computed + delta);
951 }
954 /*
955 Local Variables:
956 mode:c++
957 c-file-style:"stroustrup"
958 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
959 indent-tabs-mode:nil
960 fill-column:99
961 End:
962 */
963 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :