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 <libnr/nr-matrix-fns.h>
29 #include <libnrtype/FontFactory.h>
30 #include <libnrtype/font-instance.h>
31 #include <libnrtype/font-style-to-pos.h>
33 #include <glibmm/i18n.h>
34 #include "svg/svg.h"
35 #include "svg/stringstream.h"
36 #include "display/nr-arena-glyphs.h"
37 #include "attributes.h"
38 #include "document.h"
39 #include "desktop-handles.h"
40 #include "sp-namedview.h"
41 #include "style.h"
42 #include "inkscape.h"
43 #include "sp-metrics.h"
44 #include "xml/quote.h"
45 #include "xml/repr.h"
46 #include "mod360.h"
48 #include "sp-textpath.h"
49 #include "sp-tspan.h"
51 #include "text-editing.h"
53 /*#####################################################
54 # SPTEXT
55 #####################################################*/
57 static void sp_text_class_init (SPTextClass *classname);
58 static void sp_text_init (SPText *text);
59 static void sp_text_release (SPObject *object);
61 static void sp_text_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
62 static void sp_text_set (SPObject *object, unsigned key, gchar const *value);
63 static void sp_text_child_added (SPObject *object, Inkscape::XML::Node *rch, Inkscape::XML::Node *ref);
64 static void sp_text_remove_child (SPObject *object, Inkscape::XML::Node *rch);
65 static void sp_text_update (SPObject *object, SPCtx *ctx, guint flags);
66 static void sp_text_modified (SPObject *object, guint flags);
67 static Inkscape::XML::Node *sp_text_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);
69 static void sp_text_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
70 static NRArenaItem *sp_text_show (SPItem *item, NRArena *arena, unsigned key, unsigned flags);
71 static void sp_text_hide (SPItem *item, unsigned key);
72 static char *sp_text_description (SPItem *item);
73 static void sp_text_snappoints(SPItem const *item, SnapPointsIter p);
74 static NR::Matrix sp_text_set_transform(SPItem *item, NR::Matrix const &xform);
75 static void sp_text_print (SPItem *item, SPPrintContext *gpc);
77 static SPItemClass *text_parent_class;
79 GType
80 sp_text_get_type ()
81 {
82 static GType type = 0;
83 if (!type) {
84 GTypeInfo info = {
85 sizeof (SPTextClass),
86 NULL, /* base_init */
87 NULL, /* base_finalize */
88 (GClassInitFunc) sp_text_class_init,
89 NULL, /* class_finalize */
90 NULL, /* class_data */
91 sizeof (SPText),
92 16, /* n_preallocs */
93 (GInstanceInitFunc) sp_text_init,
94 NULL, /* value_table */
95 };
96 type = g_type_register_static (SP_TYPE_ITEM, "SPText", &info, (GTypeFlags)0);
97 }
98 return type;
99 }
101 static void
102 sp_text_class_init (SPTextClass *classname)
103 {
104 SPObjectClass *sp_object_class = (SPObjectClass *) classname;
105 SPItemClass *item_class = (SPItemClass *) classname;
107 text_parent_class = (SPItemClass*)g_type_class_ref (SP_TYPE_ITEM);
109 sp_object_class->release = sp_text_release;
110 sp_object_class->build = sp_text_build;
111 sp_object_class->set = sp_text_set;
112 sp_object_class->child_added = sp_text_child_added;
113 sp_object_class->remove_child = sp_text_remove_child;
114 sp_object_class->update = sp_text_update;
115 sp_object_class->modified = sp_text_modified;
116 sp_object_class->write = sp_text_write;
118 item_class->bbox = sp_text_bbox;
119 item_class->show = sp_text_show;
120 item_class->hide = sp_text_hide;
121 item_class->description = sp_text_description;
122 item_class->snappoints = sp_text_snappoints;
123 item_class->set_transform = sp_text_set_transform;
124 item_class->print = sp_text_print;
125 }
127 static void
128 sp_text_init (SPText *text)
129 {
130 new (&text->layout) Inkscape::Text::Layout;
131 new (&text->attributes) TextTagAttributes;
132 }
134 static void
135 sp_text_release (SPObject *object)
136 {
137 SPText *text = SP_TEXT(object);
138 text->attributes.~TextTagAttributes();
139 text->layout.~Layout();
141 if (((SPObjectClass *) text_parent_class)->release)
142 ((SPObjectClass *) text_parent_class)->release(object);
143 }
145 static void
146 sp_text_build (SPObject *object, SPDocument *doc, Inkscape::XML::Node *repr)
147 {
148 sp_object_read_attr(object, "x");
149 sp_object_read_attr(object, "y");
150 sp_object_read_attr(object, "dx");
151 sp_object_read_attr(object, "dy");
152 sp_object_read_attr(object, "rotate");
154 if (((SPObjectClass *) text_parent_class)->build)
155 ((SPObjectClass *) text_parent_class)->build(object, doc, repr);
157 sp_object_read_attr(object, "sodipodi:linespacing"); // has to happen after the styles are read
158 }
160 static void
161 sp_text_set(SPObject *object, unsigned key, gchar const *value)
162 {
163 SPText *text = SP_TEXT (object);
165 if (text->attributes.readSingleAttribute(key, value)) {
166 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
167 } else {
168 switch (key) {
169 case SP_ATTR_SODIPODI_LINESPACING:
170 // convert deprecated tag to css
171 if (value) {
172 text->style->line_height.set = TRUE;
173 text->style->line_height.inherit = FALSE;
174 text->style->line_height.normal = FALSE;
175 text->style->line_height.unit = SP_CSS_UNIT_PERCENT;
176 text->style->line_height.value = text->style->line_height.computed = sp_svg_read_percentage (value, 1.0);
177 }
178 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
179 break;
180 default:
181 if (((SPObjectClass *) text_parent_class)->set)
182 ((SPObjectClass *) text_parent_class)->set (object, key, value);
183 break;
184 }
185 }
186 }
188 static void
189 sp_text_child_added (SPObject *object, Inkscape::XML::Node *rch, Inkscape::XML::Node *ref)
190 {
191 SPText *text = SP_TEXT (object);
193 if (((SPObjectClass *) text_parent_class)->child_added)
194 ((SPObjectClass *) text_parent_class)->child_added (object, rch, ref);
196 text->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_CONTENT_MODIFIED_FLAG);
197 }
199 static void
200 sp_text_remove_child (SPObject *object, Inkscape::XML::Node *rch)
201 {
202 SPText *text = SP_TEXT (object);
204 if (((SPObjectClass *) text_parent_class)->remove_child)
205 ((SPObjectClass *) text_parent_class)->remove_child (object, rch);
207 text->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_CONTENT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
208 }
210 static void
211 sp_text_update (SPObject *object, SPCtx *ctx, guint flags)
212 {
213 SPText *text = SP_TEXT (object);
215 if (((SPObjectClass *) text_parent_class)->update)
216 ((SPObjectClass *) text_parent_class)->update (object, ctx, flags);
218 guint cflags = (flags & SP_OBJECT_MODIFIED_CASCADE);
219 if (flags & SP_OBJECT_MODIFIED_FLAG) cflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
222 /* Create temporary list of children */
223 GSList *l = NULL;
224 for (SPObject *child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
225 sp_object_ref (SP_OBJECT (child), object);
226 l = g_slist_prepend (l, child);
227 }
228 l = g_slist_reverse (l);
229 while (l) {
230 SPObject *child = SP_OBJECT (l->data);
231 l = g_slist_remove (l, child);
232 if (cflags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
233 /* fixme: Do we need transform? */
234 child->updateDisplay(ctx, cflags);
235 }
236 sp_object_unref (SP_OBJECT (child), object);
237 }
238 if (flags & ( SP_OBJECT_STYLE_MODIFIED_FLAG |
239 SP_OBJECT_CHILD_MODIFIED_FLAG |
240 SP_TEXT_LAYOUT_MODIFIED_FLAG ) )
241 {
242 /* fixme: It is not nice to have it here, but otherwise children content changes does not work */
243 /* fixme: Even now it may not work, as we are delayed */
244 /* fixme: So check modification flag everywhere immediate state is used */
245 text->rebuildLayout();
247 NRRect paintbox;
248 sp_item_invoke_bbox(text, &paintbox, NR::identity(), TRUE);
249 for (SPItemView* v = text->display; v != NULL; v = v->next) {
250 text->_clearFlow(NR_ARENA_GROUP(v->arenaitem));
251 // pass the bbox of the text object as paintbox (used for paintserver fills)
252 text->layout.show(NR_ARENA_GROUP(v->arenaitem), &paintbox);
253 }
254 }
255 }
257 static void
258 sp_text_modified (SPObject *object, guint flags)
259 {
260 if (((SPObjectClass *) text_parent_class)->modified)
261 ((SPObjectClass *) text_parent_class)->modified (object, flags);
263 guint cflags = (flags & SP_OBJECT_MODIFIED_CASCADE);
264 if (flags & SP_OBJECT_MODIFIED_FLAG) cflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
266 /* Create temporary list of children */
267 GSList *l = NULL;
268 SPObject *child;
269 for (child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
270 sp_object_ref (SP_OBJECT (child), object);
271 l = g_slist_prepend (l, child);
272 }
273 l = g_slist_reverse (l);
274 while (l) {
275 child = SP_OBJECT (l->data);
276 l = g_slist_remove (l, child);
277 if (cflags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
278 child->emitModified(cflags);
279 }
280 sp_object_unref (SP_OBJECT (child), object);
281 }
282 }
284 static Inkscape::XML::Node *
285 sp_text_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
286 {
287 SPText *text = SP_TEXT (object);
289 if (flags & SP_OBJECT_WRITE_BUILD) {
290 if (!repr)
291 repr = sp_repr_new ("svg:text");
292 GSList *l = NULL;
293 for (SPObject *child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
294 Inkscape::XML::Node *crepr = NULL;
295 if (SP_IS_STRING(child)) {
296 crepr = sp_repr_new_text(SP_STRING(child)->string.c_str());
297 } else {
298 crepr = child->updateRepr(NULL, flags);
299 }
300 if (crepr) l = g_slist_prepend (l, crepr);
301 }
302 while (l) {
303 repr->addChild((Inkscape::XML::Node *) l->data, NULL);
304 Inkscape::GC::release((Inkscape::XML::Node *) l->data);
305 l = g_slist_remove (l, l->data);
306 }
307 } else {
308 for (SPObject *child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
309 if (SP_IS_STRING(child)) {
310 SP_OBJECT_REPR(child)->setContent(SP_STRING(child)->string.c_str());
311 } else {
312 child->updateRepr(flags);
313 }
314 }
315 }
317 text->attributes.writeTo(repr);
319 // deprecated attribute, but keep it around for backwards compatibility
320 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) {
321 Inkscape::SVGOStringStream os;
322 os << (text->style->line_height.value * 100.0) << "%";
323 SP_OBJECT_REPR(text)->setAttribute("sodipodi:linespacing", os.str().c_str());
324 }
325 else
326 SP_OBJECT_REPR(text)->setAttribute("sodipodi:linespacing", NULL);
328 if (((SPObjectClass *) (text_parent_class))->write)
329 ((SPObjectClass *) (text_parent_class))->write (object, repr, flags);
331 return repr;
332 }
334 static void
335 sp_text_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const /*flags*/)
336 {
337 SP_TEXT(item)->layout.getBoundingBox(bbox, transform);
339 // Add stroke width
340 SPStyle* style=SP_OBJECT_STYLE (item);
341 if (style->stroke.type != SP_PAINT_TYPE_NONE) {
342 double const scale = expansion(transform);
343 if ( fabs(style->stroke_width.computed * scale) > 0.01 ) { // sinon c'est 0=oon veut pas de bord
344 double const width = MAX(0.125, style->stroke_width.computed * scale);
345 if ( fabs(bbox->x1 - bbox->x0) > -0.00001 && fabs(bbox->y1 - bbox->y0) > -0.00001 ) {
346 bbox->x0-=0.5*width;
347 bbox->x1+=0.5*width;
348 bbox->y0-=0.5*width;
349 bbox->y1+=0.5*width;
350 }
351 }
352 }
353 }
356 static NRArenaItem *
357 sp_text_show(SPItem *item, NRArena *arena, unsigned /* key*/, unsigned /*flags*/)
358 {
359 SPText *group = (SPText *) item;
361 NRArenaGroup *flowed = NRArenaGroup::create(arena);
362 nr_arena_group_set_transparent (flowed, FALSE);
364 // pass the bbox of the text object as paintbox (used for paintserver fills)
365 NRRect paintbox;
366 sp_item_invoke_bbox(item, &paintbox, NR::identity(), TRUE);
367 group->layout.show(flowed, &paintbox);
369 return flowed;
370 }
372 static void
373 sp_text_hide(SPItem *item, unsigned key)
374 {
375 if (((SPItemClass *) text_parent_class)->hide)
376 ((SPItemClass *) text_parent_class)->hide (item, key);
377 }
379 static char *
380 sp_text_description(SPItem *item)
381 {
382 SPText *text = (SPText *) item;
383 SPStyle *style = SP_OBJECT_STYLE(text);
385 font_instance *tf = (font_factory::Default())->Face(style->text->font_family.value,
386 font_style_to_pos(*style));
387 char name_buf[256];
388 char *n;
389 if (tf) {
390 tf->Name(name_buf, sizeof(name_buf));
391 n = xml_quote_strdup(name_buf);
392 tf->Unref();
393 } else {
394 /* TRANSLATORS: For description of font with no name. */
395 n = g_strdup(_("<no name found>"));
396 }
398 GString *xs = SP_PX_TO_METRIC_STRING(style->font_size.computed, SP_DT_NAMEDVIEW(SP_ACTIVE_DESKTOP)->getDefaultMetric());
400 char *ret = ( SP_IS_TEXT_TEXTPATH(item)
401 ? g_strdup_printf(_("<b>Text on path</b> (%s, %s)"), n, xs->str)
402 : g_strdup_printf(_("<b>Text</b> (%s, %s)"), n, xs->str) );
403 g_free(n);
404 return ret;
405 }
407 static void sp_text_snappoints(SPItem const *item, SnapPointsIter p)
408 {
409 // the baseline anchor of the first char
410 Inkscape::Text::Layout const *layout = te_get_layout((SPItem *) item);
411 if(layout != NULL) {
412 *p = layout->characterAnchorPoint(layout->begin()) * sp_item_i2d_affine(item);
413 }
414 }
416 static NR::Matrix
417 sp_text_set_transform (SPItem *item, NR::Matrix const &xform)
418 {
419 SPText *text = SP_TEXT(item);
421 // we cannot optimize textpath because changing its fontsize will break its match to the path
422 if (SP_IS_TEXT_TEXTPATH (text))
423 return xform;
425 /* This function takes care of scaling & translation only, we return whatever parts we can't
426 handle. */
428 // TODO: pjrm tried to use fontsize_expansion(xform) here and it works for text in that font size
429 // is scaled more intuitively when scaling non-uniformly; however this necessitated using
430 // fontsize_expansion instead of expansion in other places too, where it was not appropriate
431 // (e.g. it broke stroke width on copy/pasting of style from horizontally stretched to vertically
432 // stretched shape). Using fontsize_expansion only here broke setting the style via font
433 // dialog. This needs to be investigated further.
434 double const ex = NR::expansion(xform);
435 if (ex == 0) {
436 return xform;
437 }
439 NR::Matrix ret(NR::transform(xform));
440 ret[0] /= ex;
441 ret[1] /= ex;
442 ret[2] /= ex;
443 ret[3] /= ex;
445 // Adjust x/y, dx/dy
446 text->_adjustCoordsRecursive (item, xform * ret.inverse(), ex);
448 // Adjust font size
449 text->_adjustFontsizeRecursive (item, ex);
451 // Adjust stroke width
452 sp_item_adjust_stroke_width_recursive (item, ex);
454 // Adjust pattern fill
455 sp_item_adjust_pattern(item, xform * ret.inverse());
457 // Adjust gradient fill
458 sp_item_adjust_gradient(item, xform * ret.inverse());
460 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
462 return ret;
463 }
465 static void
466 sp_text_print (SPItem *item, SPPrintContext *ctx)
467 {
468 NRRect pbox, dbox, bbox;
469 SPText *group = SP_TEXT (item);
471 sp_item_invoke_bbox(item, &pbox, NR::identity(), TRUE);
472 sp_item_bbox_desktop (item, &bbox);
473 dbox.x0 = 0.0;
474 dbox.y0 = 0.0;
475 dbox.x1 = sp_document_width (SP_OBJECT_DOCUMENT (item));
476 dbox.y1 = sp_document_height (SP_OBJECT_DOCUMENT (item));
477 NR::Matrix const ctm = sp_item_i2d_affine(item);
479 group->layout.print(ctx,&pbox,&dbox,&bbox,ctm);
480 }
482 /*
483 * Member functions
484 */
486 unsigned SPText::_buildLayoutInput(SPObject *root, Inkscape::Text::Layout::OptionalTextTagAttrs const &parent_optional_attrs, unsigned parent_attrs_offset, bool in_textpath)
487 {
488 unsigned length = 0;
489 int child_attrs_offset = 0;
490 Inkscape::Text::Layout::OptionalTextTagAttrs optional_attrs;
492 if (SP_IS_TEXT(root)) {
493 SP_TEXT(root)->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, true, true);
494 }
495 else if (SP_IS_TSPAN(root)) {
496 SPTSpan *tspan = SP_TSPAN(root);
497 bool use_xy = !in_textpath && (tspan->role == SP_TSPAN_ROLE_UNSPECIFIED || !tspan->attributes.singleXYCoordinates());
498 tspan->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, use_xy, true);
499 }
500 else if (SP_IS_TEXTPATH(root)) {
501 in_textpath = true;
502 SP_TEXTPATH(root)->attributes.mergeInto(&optional_attrs, parent_optional_attrs, parent_attrs_offset, false, true);
503 optional_attrs.x.clear();
504 optional_attrs.y.clear();
505 }
506 else {
507 optional_attrs = parent_optional_attrs;
508 child_attrs_offset = parent_attrs_offset;
509 }
511 if (SP_IS_TSPAN(root))
512 if (SP_TSPAN(root)->role != SP_TSPAN_ROLE_UNSPECIFIED) {
513 // we need to allow the first line not to have role=line, but still set the source_cookie to the right value
514 SPObject *prev_object = SP_OBJECT_PREV(root);
515 if (prev_object && SP_IS_TSPAN(prev_object)) {
516 if (!layout.inputExists())
517 layout.appendText("", prev_object->style, prev_object, &optional_attrs);
518 layout.appendControlCode(Inkscape::Text::Layout::PARAGRAPH_BREAK, prev_object);
519 }
520 if (!root->hasChildren())
521 layout.appendText("", root->style, root, &optional_attrs);
522 length++; // interpreting line breaks as a character for the purposes of x/y/etc attributes
523 // is a liberal interpretation of the svg spec, but a strict reading would mean
524 // that if the first line is empty the second line would take its place at the
525 // start position. Very confusing.
526 child_attrs_offset--;
527 }
529 for (SPObject *child = sp_object_first_child(root) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
530 if (SP_IS_STRING(child)) {
531 Glib::ustring const &string = SP_STRING(child)->string;
532 layout.appendText(string, root->style, child, &optional_attrs, child_attrs_offset + length);
533 length += string.length();
534 } else {
535 length += _buildLayoutInput(child, optional_attrs, child_attrs_offset + length, in_textpath);
536 }
537 }
539 return length;
540 }
542 void SPText::rebuildLayout()
543 {
544 layout.clear();
545 Inkscape::Text::Layout::OptionalTextTagAttrs optional_attrs;
546 _buildLayoutInput(this, optional_attrs, 0, false);
547 layout.calculateFlow();
548 for (SPObject *child = firstChild() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
549 if (SP_IS_TEXTPATH(child)) {
550 SPTextPath const *textpath = SP_TEXTPATH(child);
551 if (textpath->originalPath != NULL) {
552 //g_print(layout.dumpAsText().c_str());
553 layout.fitToPathAlign(textpath->startOffset, *textpath->originalPath);
554 }
555 }
556 }
557 //g_print(layout.dumpAsText().c_str());
559 // set the x,y attributes on role:line spans
560 for (SPObject *child = firstChild() ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
561 if (!SP_IS_TSPAN(child)) continue;
562 SPTSpan *tspan = SP_TSPAN(child);
563 if (tspan->role == SP_TSPAN_ROLE_UNSPECIFIED) continue;
564 if (!tspan->attributes.singleXYCoordinates()) continue;
565 Inkscape::Text::Layout::iterator iter = layout.sourceToIterator(tspan);
566 NR::Point anchor_point = layout.chunkAnchorPoint(iter);
567 sp_repr_set_svg_double(SP_OBJECT_REPR(tspan), "x", anchor_point[NR::X]);
568 sp_repr_set_svg_double(SP_OBJECT_REPR(tspan), "y", anchor_point[NR::Y]);
569 }
570 }
573 void SPText::_adjustFontsizeRecursive(SPItem *item, double ex, bool is_root)
574 {
575 SPStyle *style = SP_OBJECT_STYLE (item);
577 if (style && !NR_DF_TEST_CLOSE (ex, 1.0, NR_EPSILON)) {
578 if (!style->font_size.set && is_root) {
579 style->font_size.set = 1;
580 style->font_size.type = SP_FONT_SIZE_LENGTH;
581 }
582 style->font_size.computed *= ex;
583 style->letter_spacing.computed *= ex;
584 style->word_spacing.computed *= ex;
585 item->updateRepr();
586 }
588 for (SPObject *o = item->children; o != NULL; o = o->next) {
589 if (SP_IS_ITEM(o))
590 _adjustFontsizeRecursive(SP_ITEM(o), ex, false);
591 }
592 }
594 void SPText::_adjustCoordsRecursive(SPItem *item, NR::Matrix const &m, double ex, bool is_root)
595 {
596 if (SP_IS_TSPAN(item))
597 SP_TSPAN(item)->attributes.transform(m, ex, ex, is_root);
598 // it doesn't matter if we change the x,y for role=line spans because we'll just overwrite them anyway
599 else if (SP_IS_TEXT(item))
600 SP_TEXT(item)->attributes.transform(m, ex, ex, is_root);
601 else if (SP_IS_TEXTPATH(item))
602 SP_TEXTPATH(item)->attributes.transform(m, ex, ex, is_root);
604 for (SPObject *o = item->children; o != NULL; o = o->next) {
605 if (SP_IS_ITEM(o))
606 _adjustCoordsRecursive(SP_ITEM(o), m, ex, false);
607 }
608 }
611 void SPText::_clearFlow(NRArenaGroup *in_arena)
612 {
613 nr_arena_item_request_render (in_arena);
614 for (NRArenaItem *child = in_arena->children; child != NULL; ) {
615 NRArenaItem *nchild = child->next;
617 nr_arena_glyphs_group_clear(NR_ARENA_GLYPHS_GROUP(child));
618 nr_arena_item_remove_child (in_arena, child);
620 child=nchild;
621 }
622 }
625 /*
626 * TextTagAttributes implementation
627 */
629 void TextTagAttributes::readFrom(Inkscape::XML::Node const *node)
630 {
631 readSingleAttribute(SP_ATTR_X, node->attribute("x"));
632 readSingleAttribute(SP_ATTR_Y, node->attribute("y"));
633 readSingleAttribute(SP_ATTR_DX, node->attribute("dx"));
634 readSingleAttribute(SP_ATTR_DY, node->attribute("dy"));
635 readSingleAttribute(SP_ATTR_ROTATE, node->attribute("rotate"));
636 }
638 bool TextTagAttributes::readSingleAttribute(unsigned key, gchar const *value)
639 {
640 std::vector<SVGLength> *attr_vector;
641 switch (key) {
642 case SP_ATTR_X: attr_vector = &attributes.x; break;
643 case SP_ATTR_Y: attr_vector = &attributes.y; break;
644 case SP_ATTR_DX: attr_vector = &attributes.dx; break;
645 case SP_ATTR_DY: attr_vector = &attributes.dy; break;
646 case SP_ATTR_ROTATE: attr_vector = &attributes.rotate; break;
647 default: return false;
648 }
650 // FIXME: sp_svg_length_list_read() amalgamates repeated separators. This prevents unset values.
651 *attr_vector = sp_svg_length_list_read(value);
652 return true;
653 }
655 void TextTagAttributes::writeTo(Inkscape::XML::Node *node) const
656 {
657 writeSingleAttribute(node, "x", attributes.x);
658 writeSingleAttribute(node, "y", attributes.y);
659 writeSingleAttribute(node, "dx", attributes.dx);
660 writeSingleAttribute(node, "dy", attributes.dy);
661 writeSingleAttribute(node, "rotate", attributes.rotate);
662 }
664 void TextTagAttributes::writeSingleAttribute(Inkscape::XML::Node *node, gchar const *key, std::vector<SVGLength> const &attr_vector)
665 {
666 if (attr_vector.empty())
667 node->setAttribute(key, NULL);
668 else {
669 Glib::ustring string;
670 gchar single_value_string[32];
672 // FIXME: this has no concept of unset values because sp_svg_length_list_read() can't read them back in
673 for (std::vector<SVGLength>::const_iterator it = attr_vector.begin() ; it != attr_vector.end() ; it++) {
674 g_ascii_formatd(single_value_string, sizeof (single_value_string), "%.8g", it->computed);
675 if (!string.empty()) string += ' ';
676 string += single_value_string;
677 }
678 node->setAttribute(key, string.c_str());
679 }
680 }
682 bool TextTagAttributes::singleXYCoordinates() const
683 {
684 return attributes.x.size() <= 1 && attributes.y.size() <= 1;
685 }
687 bool TextTagAttributes::anyAttributesSet() const
688 {
689 return !attributes.x.empty() || !attributes.y.empty() || !attributes.dx.empty() || !attributes.dy.empty() || !attributes.rotate.empty();
690 }
692 NR::Point TextTagAttributes::firstXY() const
693 {
694 NR::Point point;
695 if (attributes.x.empty()) point[NR::X] = 0.0;
696 else point[NR::X] = attributes.x[0].computed;
697 if (attributes.y.empty()) point[NR::Y] = 0.0;
698 else point[NR::Y] = attributes.y[0].computed;
699 return point;
700 }
702 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
703 {
704 mergeSingleAttribute(&output->x, parent_attrs.x, parent_attrs_offset, copy_xy ? &attributes.x : NULL);
705 mergeSingleAttribute(&output->y, parent_attrs.y, parent_attrs_offset, copy_xy ? &attributes.y : NULL);
706 mergeSingleAttribute(&output->dx, parent_attrs.dx, parent_attrs_offset, copy_dxdyrotate ? &attributes.dx : NULL);
707 mergeSingleAttribute(&output->dy, parent_attrs.dy, parent_attrs_offset, copy_dxdyrotate ? &attributes.dy : NULL);
708 mergeSingleAttribute(&output->rotate, parent_attrs.rotate, parent_attrs_offset, copy_dxdyrotate ? &attributes.rotate : NULL);
709 }
711 void TextTagAttributes::mergeSingleAttribute(std::vector<SVGLength> *output_list, std::vector<SVGLength> const &parent_list, unsigned parent_offset, std::vector<SVGLength> const *overlay_list)
712 {
713 if (overlay_list == NULL) {
714 output_list->resize(std::max(0, (int)parent_list.size() - (int)parent_offset));
715 std::copy(parent_list.begin() + parent_offset, parent_list.end(), output_list->begin());
716 } else {
717 output_list->clear();
718 output_list->reserve(std::max((int)parent_list.size() - (int)parent_offset, (int)overlay_list->size()));
719 unsigned overlay_offset = 0;
720 while (parent_offset < parent_list.size() || overlay_offset < overlay_list->size()) {
721 SVGLength const *this_item;
722 if (overlay_offset < overlay_list->size()) {
723 this_item = &(*overlay_list)[overlay_offset];
724 overlay_offset++;
725 parent_offset++;
726 } else {
727 this_item = &parent_list[parent_offset];
728 parent_offset++;
729 }
730 output_list->push_back(*this_item);
731 }
732 }
733 }
735 void TextTagAttributes::erase(unsigned start_index, unsigned n)
736 {
737 if (n == 0) return;
738 if (!singleXYCoordinates()) {
739 eraseSingleAttribute(&attributes.x, start_index, n);
740 eraseSingleAttribute(&attributes.y, start_index, n);
741 }
742 eraseSingleAttribute(&attributes.dx, start_index, n);
743 eraseSingleAttribute(&attributes.dy, start_index, n);
744 eraseSingleAttribute(&attributes.rotate, start_index, n);
745 }
747 void TextTagAttributes::eraseSingleAttribute(std::vector<SVGLength> *attr_vector, unsigned start_index, unsigned n)
748 {
749 if (attr_vector->size() <= start_index) return;
750 if (attr_vector->size() <= start_index + n)
751 attr_vector->erase(attr_vector->begin() + start_index, attr_vector->end());
752 else
753 attr_vector->erase(attr_vector->begin() + start_index, attr_vector->begin() + start_index + n);
754 }
756 void TextTagAttributes::insert(unsigned start_index, unsigned n)
757 {
758 if (n == 0) return;
759 if (!singleXYCoordinates()) {
760 insertSingleAttribute(&attributes.x, start_index, n, true);
761 insertSingleAttribute(&attributes.y, start_index, n, true);
762 }
763 insertSingleAttribute(&attributes.dx, start_index, n, false);
764 insertSingleAttribute(&attributes.dy, start_index, n, false);
765 insertSingleAttribute(&attributes.rotate, start_index, n, false);
766 }
768 void TextTagAttributes::insertSingleAttribute(std::vector<SVGLength> *attr_vector, unsigned start_index, unsigned n, bool is_xy)
769 {
770 if (attr_vector->size() <= start_index) return;
771 SVGLength zero_length;
772 zero_length = 0.0;
773 attr_vector->insert(attr_vector->begin() + start_index, n, zero_length);
774 if (is_xy) {
775 double begin = start_index == 0 ? (*attr_vector)[start_index + n].computed : (*attr_vector)[start_index - 1].computed;
776 double diff = ((*attr_vector)[start_index + n].computed - begin) / n; // n tested for nonzero in insert()
777 for (unsigned i = 0 ; i < n ; i++)
778 (*attr_vector)[start_index + i] = begin + diff * i;
779 }
780 }
782 void TextTagAttributes::split(unsigned index, TextTagAttributes *second)
783 {
784 if (!singleXYCoordinates()) {
785 splitSingleAttribute(&attributes.x, index, &second->attributes.x, false);
786 splitSingleAttribute(&attributes.y, index, &second->attributes.y, false);
787 }
788 splitSingleAttribute(&attributes.dx, index, &second->attributes.dx, true);
789 splitSingleAttribute(&attributes.dy, index, &second->attributes.dy, true);
790 splitSingleAttribute(&attributes.rotate, index, &second->attributes.rotate, true);
791 }
793 void TextTagAttributes::splitSingleAttribute(std::vector<SVGLength> *first_vector, unsigned index, std::vector<SVGLength> *second_vector, bool trimZeros)
794 {
795 second_vector->clear();
796 if (first_vector->size() <= index) return;
797 second_vector->resize(first_vector->size() - index);
798 std::copy(first_vector->begin() + index, first_vector->end(), second_vector->begin());
799 first_vector->resize(index);
800 if (trimZeros)
801 while (!first_vector->empty() && (!first_vector->back()._set || first_vector->back().value == 0.0))
802 first_vector->resize(first_vector->size() - 1);
803 }
805 void TextTagAttributes::join(TextTagAttributes const &first, TextTagAttributes const &second, unsigned second_index)
806 {
807 if (second.singleXYCoordinates()) {
808 attributes.x = first.attributes.x;
809 attributes.y = first.attributes.y;
810 } else {
811 joinSingleAttribute(&attributes.x, first.attributes.x, second.attributes.x, second_index);
812 joinSingleAttribute(&attributes.y, first.attributes.y, second.attributes.y, second_index);
813 }
814 joinSingleAttribute(&attributes.dx, first.attributes.dx, second.attributes.dx, second_index);
815 joinSingleAttribute(&attributes.dy, first.attributes.dy, second.attributes.dy, second_index);
816 joinSingleAttribute(&attributes.rotate, first.attributes.rotate, second.attributes.rotate, second_index);
817 }
819 void TextTagAttributes::joinSingleAttribute(std::vector<SVGLength> *dest_vector, std::vector<SVGLength> const &first_vector, std::vector<SVGLength> const &second_vector, unsigned second_index)
820 {
821 if (second_vector.empty())
822 *dest_vector = first_vector;
823 else {
824 dest_vector->resize(second_index + second_vector.size());
825 if (first_vector.size() < second_index) {
826 std::copy(first_vector.begin(), first_vector.end(), dest_vector->begin());
827 SVGLength zero_length;
828 zero_length = 0.0;
829 std::fill(dest_vector->begin() + first_vector.size(), dest_vector->begin() + second_index, zero_length);
830 } else
831 std::copy(first_vector.begin(), first_vector.begin() + second_index, dest_vector->begin());
832 std::copy(second_vector.begin(), second_vector.end(), dest_vector->begin() + second_index);
833 }
834 }
836 void TextTagAttributes::transform(NR::Matrix const &matrix, double scale_x, double scale_y, bool extend_zero_length)
837 {
838 SVGLength zero_length;
839 zero_length = 0.0;
841 /* edge testcases for this code:
842 1) moving text elements whose position is done entirely with transform="...", no x,y attributes
843 2) unflowing multi-line flowtext then moving it (it has x but not y)
844 */
845 unsigned points_count = std::max(attributes.x.size(), attributes.y.size());
846 if (extend_zero_length && points_count < 1)
847 points_count = 1;
848 for (unsigned i = 0 ; i < points_count ; i++) {
849 NR::Point point;
850 if (i < attributes.x.size()) point[NR::X] = attributes.x[i].computed;
851 else point[NR::X] = 0.0;
852 if (i < attributes.y.size()) point[NR::Y] = attributes.y[i].computed;
853 else point[NR::Y] = 0.0;
854 point *= matrix;
855 if (i < attributes.x.size())
856 attributes.x[i] = point[NR::X];
857 else if (point[NR::X] != 0.0 && extend_zero_length) {
858 attributes.x.resize(i + 1, zero_length);
859 attributes.x[i] = point[NR::X];
860 }
861 if (i < attributes.y.size())
862 attributes.y[i] = point[NR::Y];
863 else if (point[NR::Y] != 0.0 && extend_zero_length) {
864 attributes.y.resize(i + 1, zero_length);
865 attributes.y[i] = point[NR::Y];
866 }
867 }
868 for (std::vector<SVGLength>::iterator it = attributes.dx.begin() ; it != attributes.dx.end() ; it++)
869 *it = it->computed * scale_x;
870 for (std::vector<SVGLength>::iterator it = attributes.dy.begin() ; it != attributes.dy.end() ; it++)
871 *it = it->computed * scale_y;
872 }
874 void TextTagAttributes::addToDxDy(unsigned index, NR::Point const &adjust)
875 {
876 SVGLength zero_length;
877 zero_length = 0.0;
879 if (adjust[NR::X] != 0.0) {
880 if (attributes.dx.size() < index + 1) attributes.dx.resize(index + 1, zero_length);
881 attributes.dx[index] = attributes.dx[index].computed + adjust[NR::X];
882 }
883 if (adjust[NR::Y] != 0.0) {
884 if (attributes.dy.size() < index + 1) attributes.dy.resize(index + 1, zero_length);
885 attributes.dy[index] = attributes.dy[index].computed + adjust[NR::Y];
886 }
887 }
889 void TextTagAttributes::addToRotate(unsigned index, double delta)
890 {
891 SVGLength zero_length;
892 zero_length = 0.0;
894 if (attributes.rotate.size() < index + 1) {
895 if (attributes.rotate.empty())
896 attributes.rotate.resize(index + 1, zero_length);
897 else
898 attributes.rotate.resize(index + 1, attributes.rotate.back());
899 }
900 attributes.rotate[index] = mod360(attributes.rotate[index].computed + delta);
901 }
904 /*
905 Local Variables:
906 mode:c++
907 c-file-style:"stroustrup"
908 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
909 indent-tabs-mode:nil
910 fill-column:99
911 End:
912 */
913 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :