summaryrefslogtreecommitdiff
path: root/source/pdf/pdf-annot-edit.c
blob: d0ad09153a71ebf3412ffee122dcae1dc7747503 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
#include "mupdf/fitz.h"
#include "mupdf/pdf.h"

#include <string.h>

#define TEXT_ANNOT_SIZE (25.0f)

const char *
pdf_string_from_annot_type(fz_context *ctx, fz_annot_type type)
{
	switch (type)
	{
	case PDF_ANNOT_TEXT: return "Text";
	case PDF_ANNOT_LINK: return "Link";
	case PDF_ANNOT_FREE_TEXT: return "FreeText";
	case PDF_ANNOT_LINE: return "Line";
	case PDF_ANNOT_SQUARE: return "Square";
	case PDF_ANNOT_CIRCLE: return "Circle";
	case PDF_ANNOT_POLYGON: return "Polygon";
	case PDF_ANNOT_POLY_LINE: return "PolyLine";
	case PDF_ANNOT_HIGHLIGHT: return "Highlight";
	case PDF_ANNOT_UNDERLINE: return "Underline";
	case PDF_ANNOT_SQUIGGLY: return "Squiggly";
	case PDF_ANNOT_STRIKE_OUT: return "StrikeOut";
	case PDF_ANNOT_STAMP: return "Stamp";
	case PDF_ANNOT_CARET: return "Caret";
	case PDF_ANNOT_INK: return "Ink";
	case PDF_ANNOT_POPUP: return "Popup";
	case PDF_ANNOT_FILE_ATTACHMENT: return "FileAttachment";
	case PDF_ANNOT_SOUND: return "Sound";
	case PDF_ANNOT_MOVIE: return "Movie";
	case PDF_ANNOT_WIDGET: return "Widget";
	case PDF_ANNOT_SCREEN: return "Screen";
	case PDF_ANNOT_PRINTER_MARK: return "PrinterMark";
	case PDF_ANNOT_TRAP_NET: return "TrapNet";
	case PDF_ANNOT_WATERMARK: return "Watermark";
	case PDF_ANNOT_3D: return "3D";
	default: return "UNKNOWN";
	}
}

int
pdf_annot_type_from_string(fz_context *ctx, const char *subtype)
{
	if (!strcmp("Text", subtype)) return PDF_ANNOT_TEXT;
	if (!strcmp("Link", subtype)) return PDF_ANNOT_LINK;
	if (!strcmp("FreeText", subtype)) return PDF_ANNOT_FREE_TEXT;
	if (!strcmp("Line", subtype)) return PDF_ANNOT_LINE;
	if (!strcmp("Square", subtype)) return PDF_ANNOT_SQUARE;
	if (!strcmp("Circle", subtype)) return PDF_ANNOT_CIRCLE;
	if (!strcmp("Polygon", subtype)) return PDF_ANNOT_POLYGON;
	if (!strcmp("PolyLine", subtype)) return PDF_ANNOT_POLY_LINE;
	if (!strcmp("Highlight", subtype)) return PDF_ANNOT_HIGHLIGHT;
	if (!strcmp("Underline", subtype)) return PDF_ANNOT_UNDERLINE;
	if (!strcmp("Squiggly", subtype)) return PDF_ANNOT_SQUIGGLY;
	if (!strcmp("StrikeOut", subtype)) return PDF_ANNOT_STRIKE_OUT;
	if (!strcmp("Stamp", subtype)) return PDF_ANNOT_STAMP;
	if (!strcmp("Caret", subtype)) return PDF_ANNOT_CARET;
	if (!strcmp("Ink", subtype)) return PDF_ANNOT_INK;
	if (!strcmp("Popup", subtype)) return PDF_ANNOT_POPUP;
	if (!strcmp("FileAttachment", subtype)) return PDF_ANNOT_FILE_ATTACHMENT;
	if (!strcmp("Sound", subtype)) return PDF_ANNOT_SOUND;
	if (!strcmp("Movie", subtype)) return PDF_ANNOT_MOVIE;
	if (!strcmp("Widget", subtype)) return PDF_ANNOT_WIDGET;
	if (!strcmp("Screen", subtype)) return PDF_ANNOT_SCREEN;
	if (!strcmp("PrinterMark", subtype)) return PDF_ANNOT_PRINTER_MARK;
	if (!strcmp("TrapNet", subtype)) return PDF_ANNOT_TRAP_NET;
	if (!strcmp("Watermark", subtype)) return PDF_ANNOT_WATERMARK;
	if (!strcmp("3D", subtype)) return PDF_ANNOT_3D;
	return PDF_ANNOT_UNKNOWN;
}

static int is_allowed_subtype(fz_context *ctx, pdf_annot *annot, pdf_obj *property, pdf_obj **allowed)
{
	pdf_obj *subtype = pdf_dict_get(ctx, annot->obj, PDF_NAME_Subtype);
	while (*allowed) {
		if (pdf_name_eq(ctx, subtype, *allowed))
			return 1;
		allowed++;
	}

	return 0;
}

static void check_allowed_subtypes(fz_context *ctx, pdf_annot *annot, pdf_obj *property, pdf_obj **allowed)
{
	pdf_obj *subtype = pdf_dict_get(ctx, annot->obj, PDF_NAME_Subtype);
	if (!is_allowed_subtype(ctx, annot, property, allowed))
		fz_throw(ctx, FZ_ERROR_GENERIC, "%s annotations have no %s property", pdf_to_name(ctx, subtype), pdf_to_name(ctx, property));
}

pdf_annot *
pdf_create_annot(fz_context *ctx, pdf_page *page, fz_annot_type type)
{
	pdf_annot *annot = NULL;
	pdf_document *doc = page->doc;
	pdf_obj *annot_obj = pdf_new_dict(ctx, doc, 0);
	pdf_obj *ind_obj = NULL;

	fz_var(annot);
	fz_var(ind_obj);
	fz_try(ctx)
	{
		int ind_obj_num;
		fz_rect rect = {0.0f, 0.0f, 0.0f, 0.0f};
		const char *type_str;
		pdf_obj *annot_arr;

		type_str = pdf_string_from_annot_type(ctx, type);
		if (type == PDF_ANNOT_UNKNOWN)
			fz_throw(ctx, FZ_ERROR_GENERIC, "cannot create unknown annotation");

		annot_arr = pdf_dict_get(ctx, page->obj, PDF_NAME_Annots);
		if (annot_arr == NULL)
		{
			annot_arr = pdf_new_array(ctx, doc, 0);
			pdf_dict_put_drop(ctx, page->obj, PDF_NAME_Annots, annot_arr);
		}

		pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Type, PDF_NAME_Annot);

		pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Subtype, pdf_new_name(ctx, doc, type_str));
		pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_Rect, pdf_new_rect(ctx, doc, &rect));

		/* Make printable as default */
		pdf_dict_put_drop(ctx, annot_obj, PDF_NAME_F, pdf_new_int(ctx, doc, PDF_ANNOT_IS_PRINT));

		annot = pdf_new_annot(ctx, page);
		annot->ap = NULL;

		/*
			Both annotation object and annotation structure are now created.
			Insert the object in the hierarchy and the structure in the
			page's array.
		*/
		ind_obj_num = pdf_create_object(ctx, doc);
		pdf_update_object(ctx, doc, ind_obj_num, annot_obj);
		ind_obj = pdf_new_indirect(ctx, doc, ind_obj_num, 0);
		pdf_array_push(ctx, annot_arr, ind_obj);
		annot->obj = pdf_keep_obj(ctx, ind_obj);

		/*
			Linking must be done after any call that might throw because
			pdf_drop_annots below actually frees a list. Put the new annot
			at the end of the list, so that it will be drawn last.
		*/
		*page->annot_tailp = annot;
		page->annot_tailp = &annot->next;

		doc->dirty = 1;
	}
	fz_always(ctx)
	{
		pdf_drop_obj(ctx, annot_obj);
		pdf_drop_obj(ctx, ind_obj);
	}
	fz_catch(ctx)
	{
		pdf_drop_annots(ctx, annot);
		fz_rethrow(ctx);
	}

	return annot;
}

void
pdf_delete_annot(fz_context *ctx, pdf_page *page, pdf_annot *annot)
{
	pdf_document *doc = annot->page->doc;
	pdf_annot **annotptr;
	pdf_obj *annot_arr;
	int i;

	if (annot == NULL)
		return;

	/* Remove annot from page's list */
	for (annotptr = &page->annots; *annotptr; annotptr = &(*annotptr)->next)
	{
		if (*annotptr == annot)
			break;
	}

	/* Check the passed annotation was of this page */
	if (*annotptr == NULL)
		return;

	*annotptr = annot->next;

	/* If the removed annotation was the last in the list adjust the end pointer */
	if (*annotptr == NULL)
		page->annot_tailp = annotptr;

	/* If the removed annotation has the focus, blur it. */
	if (doc->focus == annot)
	{
		doc->focus = NULL;
		doc->focus_obj = NULL;
	}

	/* Remove the annot from the "Annots" array. */
	annot_arr = pdf_dict_get(ctx, page->obj, PDF_NAME_Annots);
	i = pdf_array_find(ctx, annot_arr, annot->obj);
	if (i >= 0)
		pdf_array_delete(ctx, annot_arr, i);

	/* The garbage collection pass when saving will remove the annot object,
	 * removing it here may break files if multiple pages use the same annot. */

	/* And free it. */
	fz_drop_annot(ctx, &annot->super);

	doc->dirty = 1;
}

int
pdf_annot_type(fz_context *ctx, pdf_annot *annot)
{
	pdf_obj *obj = annot->obj;
	pdf_obj *subtype = pdf_dict_get(ctx, obj, PDF_NAME_Subtype);
	return pdf_annot_type_from_string(ctx, pdf_to_name(ctx, subtype));
}

int
pdf_annot_flags(fz_context *ctx, pdf_annot *annot)
{
	return pdf_to_int(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_F));
}

void
pdf_set_annot_flags(fz_context *ctx, pdf_annot *annot, int flags)
{
	pdf_document *doc = annot->page->doc;
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_F, pdf_new_int(ctx, doc, flags));
	annot->changed = 1;
}

void
pdf_annot_rect(fz_context *ctx, pdf_annot *annot, fz_rect *rect)
{
	fz_matrix page_ctm;
	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);
	pdf_to_rect(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_Rect), rect);
	fz_transform_rect(rect, &page_ctm);
}

void
pdf_set_annot_rect(fz_context *ctx, pdf_annot *annot, const fz_rect *rect)
{
	pdf_document *doc = annot->page->doc;
	fz_rect trect = *rect;
	fz_matrix page_ctm, inv_page_ctm;

	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);
	fz_invert_matrix(&inv_page_ctm, &page_ctm);
	fz_transform_rect(&trect, &inv_page_ctm);

	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Rect, pdf_new_rect(ctx, doc, &trect));
	annot->changed = 1;
}

const char *
pdf_annot_contents(fz_context *ctx, pdf_annot *annot)
{
	return pdf_to_str_buf(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_Contents));
}

void
pdf_set_annot_contents(fz_context *ctx, pdf_annot *annot, const char *text)
{
	pdf_document *doc = annot->page->doc;
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Contents, pdf_new_string(ctx, doc, text, strlen(text)));
	annot->changed = 1;
}

static pdf_obj *open_subtypes[] = {
	PDF_NAME_Popup,
	PDF_NAME_Text,
	NULL,
};


int
pdf_annot_has_open(fz_context *ctx, pdf_annot *annot)
{
	return is_allowed_subtype(ctx, annot, PDF_NAME_Open, open_subtypes);
}

int
pdf_annot_is_open(fz_context *ctx, pdf_annot *annot)
{
	check_allowed_subtypes(ctx, annot, PDF_NAME_Open, open_subtypes);
	return pdf_to_bool(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_Open));
}

void
pdf_set_annot_is_open(fz_context *ctx, pdf_annot *annot, int is_open)
{
	pdf_document *doc = annot->page->doc;
	check_allowed_subtypes(ctx, annot, PDF_NAME_Open, open_subtypes);
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Open,
			pdf_new_bool(ctx, doc, is_open));
}

static pdf_obj *icon_name_subtypes[] = {
	PDF_NAME_FileAttachment,
	PDF_NAME_Sound,
	PDF_NAME_Stamp,
	PDF_NAME_Text,
	NULL,
};

int
pdf_annot_has_icon_name(fz_context *ctx, pdf_annot *annot)
{
	return is_allowed_subtype(ctx, annot, PDF_NAME_Name, icon_name_subtypes);
}

const char *
pdf_annot_icon_name(fz_context *ctx, pdf_annot *annot)
{
	check_allowed_subtypes(ctx, annot, PDF_NAME_Name, icon_name_subtypes);
	return pdf_to_str_buf(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_Name));
}

void
pdf_set_annot_icon_name(fz_context *ctx, pdf_annot *annot, const char *name)
{
	pdf_document *doc = annot->page->doc;
	check_allowed_subtypes(ctx, annot, PDF_NAME_Name, icon_name_subtypes);
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Name, pdf_new_name(ctx, doc, name));
}

static int line_ending_value(fz_context *ctx, pdf_obj *line_ending)
{
	if (pdf_name_eq(ctx, line_ending, PDF_NAME_None)) return PDF_ANNOT_LINE_ENDING_NONE;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_Square)) return PDF_ANNOT_LINE_ENDING_SQUARE;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_Circle)) return PDF_ANNOT_LINE_ENDING_CIRCLE;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_Diamond)) return PDF_ANNOT_LINE_ENDING_DIAMOND;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_OpenArrow)) return PDF_ANNOT_LINE_ENDING_OPENARROW;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_ClosedArrow)) return PDF_ANNOT_LINE_ENDING_CLOSEDARROW;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_Butt)) return PDF_ANNOT_LINE_ENDING_BUTT;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_ROpenArrow)) return PDF_ANNOT_LINE_ENDING_ROPENARROW;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_RClosedArrow)) return PDF_ANNOT_LINE_ENDING_RCLOSEDARROW;
	else if (pdf_name_eq(ctx, line_ending, PDF_NAME_Slash)) return PDF_ANNOT_LINE_ENDING_SLASH;
	else return PDF_ANNOT_LINE_ENDING_NONE;
}

static pdf_obj *line_ending_name(fz_context *ctx, int line_ending)
{
	switch (line_ending)
	{
	case PDF_ANNOT_LINE_ENDING_NONE: return PDF_NAME_None;
	case PDF_ANNOT_LINE_ENDING_SQUARE: return PDF_NAME_Square;
	case PDF_ANNOT_LINE_ENDING_CIRCLE: return PDF_NAME_Circle;
	case PDF_ANNOT_LINE_ENDING_DIAMOND: return PDF_NAME_Diamond;
	case PDF_ANNOT_LINE_ENDING_OPENARROW: return PDF_NAME_OpenArrow;
	case PDF_ANNOT_LINE_ENDING_CLOSEDARROW: return PDF_NAME_ClosedArrow;
	case PDF_ANNOT_LINE_ENDING_BUTT: return PDF_NAME_Butt;
	case PDF_ANNOT_LINE_ENDING_ROPENARROW: return PDF_NAME_ROpenArrow;
	case PDF_ANNOT_LINE_ENDING_RCLOSEDARROW: return PDF_NAME_RClosedArrow;
	case PDF_ANNOT_LINE_ENDING_SLASH: return PDF_NAME_Slash;
	default: fz_throw(ctx, FZ_ERROR_GENERIC, "invalid line ending style");
	}
}

static pdf_obj *line_ending_subtypes[] = {
	PDF_NAME_FreeText,
	PDF_NAME_Line,
	PDF_NAME_PolyLine,
	PDF_NAME_Polygon,
	NULL,
};

int
pdf_annot_has_line_ending_styles(fz_context *ctx, pdf_annot *annot)
{
	return is_allowed_subtype(ctx, annot, PDF_NAME_LE, line_ending_subtypes);
}

void
pdf_annot_line_ending_styles(fz_context *ctx, pdf_annot *annot, int *start_style, int *end_style)
{
	pdf_obj *style;
	check_allowed_subtypes(ctx, annot, PDF_NAME_LE, line_ending_subtypes);
	style = pdf_dict_get(ctx, annot->obj, PDF_NAME_LE);
	*start_style = line_ending_value(ctx, pdf_array_get(ctx, style, 0));
	*end_style = line_ending_value(ctx, pdf_array_get(ctx, style, 1));
}

void
pdf_set_annot_line_ending_styles(fz_context *ctx, pdf_annot *annot, int start_style, int end_style)
{
	pdf_document *doc = annot->page->doc;
	pdf_obj *style;
	check_allowed_subtypes(ctx, annot, PDF_NAME_LE, line_ending_subtypes);
	style = pdf_new_array(ctx, doc, 2);
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_LE, style);
	pdf_array_put_drop(ctx, style, 0, line_ending_name(ctx, start_style));
	pdf_array_put_drop(ctx, style, 1, line_ending_name(ctx, end_style));
}

float
pdf_annot_border(fz_context *ctx, pdf_annot *annot)
{
	pdf_obj *border = pdf_dict_get(ctx, annot->obj, PDF_NAME_Border);
	if (pdf_is_array(ctx, border))
		return pdf_to_real(ctx, pdf_array_get(ctx, border, 2));
	return 1;
}

void
pdf_set_annot_border(fz_context *ctx, pdf_annot *annot, float w)
{
	pdf_document *doc = annot->page->doc;
	pdf_obj *border = pdf_dict_get(ctx, annot->obj, PDF_NAME_Border);
	if (pdf_is_array(ctx, border))
		pdf_array_put_drop(ctx, border, 2, pdf_new_real(ctx, doc, w));
	else
	{
		border = pdf_new_array(ctx, doc, 3);
		pdf_array_push_drop(ctx, border, pdf_new_real(ctx, doc, 0));
		pdf_array_push_drop(ctx, border, pdf_new_real(ctx, doc, 0));
		pdf_array_push_drop(ctx, border, pdf_new_real(ctx, doc, w));
		pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Border, border);
	}

	/* Remove border style and effect dictionaries so they won't interfere. */
	pdf_dict_del(ctx, annot->obj, PDF_NAME_BS);
	pdf_dict_del(ctx, annot->obj, PDF_NAME_BE);

	annot->changed = 1;
}

static void pdf_annot_color_imp(fz_context *ctx, pdf_annot *annot, pdf_obj *key, int *n, float color[4], pdf_obj **allowed)
{
	pdf_obj *arr;
	int len;

	if (allowed)
		check_allowed_subtypes(ctx, annot, key, allowed);

	arr = pdf_dict_get(ctx, annot->obj, key);
	len = pdf_array_len(ctx, arr);

	switch (len)
	{
	case 0:
		if (n)
			*n = 0;
		break;
	case 1:
	case 2:
		if (n)
			*n = 1;
		if (color)
			color[0] = pdf_to_real(ctx, pdf_array_get(ctx, arr, 0));
		break;
	case 3:
		if (n)
			*n = 3;
		if (color)
		{
			color[0] = pdf_to_real(ctx, pdf_array_get(ctx, arr, 0));
			color[1] = pdf_to_real(ctx, pdf_array_get(ctx, arr, 1));
			color[2] = pdf_to_real(ctx, pdf_array_get(ctx, arr, 2));
		}
		break;
	case 4:
	default:
		if (n)
			*n = 4;
		if (color)
		{
			color[0] = pdf_to_real(ctx, pdf_array_get(ctx, arr, 0));
			color[1] = pdf_to_real(ctx, pdf_array_get(ctx, arr, 1));
			color[2] = pdf_to_real(ctx, pdf_array_get(ctx, arr, 2));
			color[3] = pdf_to_real(ctx, pdf_array_get(ctx, arr, 3));
		}
		break;
	}
}

static void pdf_set_annot_color_imp(fz_context *ctx, pdf_annot *annot, pdf_obj *key, int n, const float color[4], pdf_obj **allowed)
{
	pdf_document *doc = annot->page->doc;
	pdf_obj *arr;

	if (allowed)
		check_allowed_subtypes(ctx, annot, key, allowed);
	if (n != 0 && n != 1 && n != 3 && n != 4)
		fz_throw(ctx, FZ_ERROR_GENERIC, "color must be 0, 1, 3 or 4 components");
	if (!color)
		fz_throw(ctx, FZ_ERROR_GENERIC, "no color given");

	arr = pdf_new_array(ctx, doc, n);
	fz_try(ctx)
	{
		switch (n)
		{
		case 1:
			pdf_array_insert_drop(ctx, arr, pdf_new_real(ctx, doc, color[0]), 0);
			break;
		case 3:
			pdf_array_insert_drop(ctx, arr, pdf_new_real(ctx, doc, color[0]), 0);
			pdf_array_insert_drop(ctx, arr, pdf_new_real(ctx, doc, color[1]), 1);
			pdf_array_insert_drop(ctx, arr, pdf_new_real(ctx, doc, color[2]), 2);
			break;
		case 4:
			pdf_array_insert_drop(ctx, arr, pdf_new_real(ctx, doc, color[0]), 0);
			pdf_array_insert_drop(ctx, arr, pdf_new_real(ctx, doc, color[1]), 1);
			pdf_array_insert_drop(ctx, arr, pdf_new_real(ctx, doc, color[2]), 2);
			pdf_array_insert_drop(ctx, arr, pdf_new_real(ctx, doc, color[3]), 3);
			break;
		}
	}
	fz_catch(ctx)
	{
		pdf_drop_obj(ctx, arr);
		fz_rethrow(ctx);
	}

	pdf_dict_put_drop(ctx, annot->obj, key, arr);
	annot->changed = 1;
}

void
pdf_annot_color(fz_context *ctx, pdf_annot *annot, int *n, float color[4])
{
	pdf_annot_color_imp(ctx, annot, PDF_NAME_C, n, color, NULL);
}

void
pdf_set_annot_color(fz_context *ctx, pdf_annot *annot, int n, const float color[4])
{
	pdf_set_annot_color_imp(ctx, annot, PDF_NAME_C, n, color, NULL);
}

static pdf_obj *interior_color_subtypes[] = {
	PDF_NAME_Circle,
	PDF_NAME_Line,
	PDF_NAME_PolyLine,
	PDF_NAME_Polygon,
	PDF_NAME_Square,
	NULL,
};

int
pdf_annot_has_interior_color(fz_context *ctx, pdf_annot *annot)
{
	return is_allowed_subtype(ctx, annot, PDF_NAME_IC, interior_color_subtypes);
}

void
pdf_annot_interior_color(fz_context *ctx, pdf_annot *annot, int *n, float color[4])
{
	pdf_annot_color_imp(ctx, annot, PDF_NAME_IC, n, color, interior_color_subtypes);
}

void
pdf_set_annot_interior_color(fz_context *ctx, pdf_annot *annot, int n, const float color[4])
{
	pdf_set_annot_color_imp(ctx, annot, PDF_NAME_IC, n, color, interior_color_subtypes);
}

static pdf_obj *vertices_subtypes[] = {
	PDF_NAME_PolyLine,
	PDF_NAME_Polygon,
	NULL,
};

int
pdf_annot_has_vertices(fz_context *ctx, pdf_annot *annot)
{
	return is_allowed_subtype(ctx, annot, PDF_NAME_Vertices, vertices_subtypes);
}

int
pdf_annot_vertex_count(fz_context *ctx, pdf_annot *annot)
{
	pdf_obj *vertices;
	check_allowed_subtypes(ctx, annot, PDF_NAME_Vertices, vertices_subtypes);
	vertices = pdf_dict_get(ctx, annot->obj, PDF_NAME_Vertices);
	return pdf_array_len(ctx, vertices) / 2;
}

void
pdf_annot_vertex(fz_context *ctx, pdf_annot *annot, int i, float v[2])
{
	pdf_obj *vertices;
	fz_matrix page_ctm;
	fz_point point;

	check_allowed_subtypes(ctx, annot, PDF_NAME_Vertices, vertices_subtypes);

	vertices = pdf_dict_get(ctx, annot->obj, PDF_NAME_Vertices);

	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);

	point.x = pdf_to_real(ctx, pdf_array_get(ctx, vertices, i * 2));
	point.y = pdf_to_real(ctx, pdf_array_get(ctx, vertices, i * 2 + 1));
	fz_transform_point(&point, &page_ctm);
	v[0] = point.x;
	v[1] = point.y;
}

void
pdf_set_annot_vertices(fz_context *ctx, pdf_annot *annot, int n, const float *v)
{
	pdf_document *doc = annot->page->doc;
	fz_matrix page_ctm, inv_page_ctm;
	pdf_obj *vertices;
	fz_point point;
	int i;

	check_allowed_subtypes(ctx, annot, PDF_NAME_Vertices, vertices_subtypes);
	if (n <= 0 || !v)
		fz_throw(ctx, FZ_ERROR_GENERIC, "invalid number of vertices");

	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);
	fz_invert_matrix(&inv_page_ctm, &page_ctm);

	vertices = pdf_new_array(ctx, doc, n * 2);
	for (i = 0; i < n; ++i)
	{
		point.x = v[i * 2];
		point.y = v[i * 2 + 1];
		fz_transform_point(&point, &inv_page_ctm);
		pdf_array_push_drop(ctx, vertices, pdf_new_real(ctx, doc, point.x));
		pdf_array_push_drop(ctx, vertices, pdf_new_real(ctx, doc, point.y));
	}
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Vertices, vertices);
	annot->changed = 1;
}

static pdf_obj *quad_point_subtypes[] = {
	PDF_NAME_Highlight,
	PDF_NAME_Link,
	PDF_NAME_Squiggly,
	PDF_NAME_StrikeOut,
	PDF_NAME_Underline,
	NULL,
};

int
pdf_annot_has_quad_points(fz_context *ctx, pdf_annot *annot)
{
	return is_allowed_subtype(ctx, annot, PDF_NAME_QuadPoints, quad_point_subtypes);
}

int
pdf_annot_quad_point_count(fz_context *ctx, pdf_annot *annot)
{
	pdf_obj *quad_points;
	check_allowed_subtypes(ctx, annot, PDF_NAME_QuadPoints, quad_point_subtypes);
	quad_points = pdf_dict_get(ctx, annot->obj, PDF_NAME_QuadPoints);
	return pdf_array_len(ctx, quad_points) / 8;
}

void
pdf_annot_quad_point(fz_context *ctx, pdf_annot *annot, int idx, float v[8])
{
	pdf_obj *quad_points;
	fz_matrix page_ctm;
	int i;

	check_allowed_subtypes(ctx, annot, PDF_NAME_QuadPoints, quad_point_subtypes);
	quad_points = pdf_dict_get(ctx, annot->obj, PDF_NAME_QuadPoints);
	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);

	for (i = 0; i < 8; i += 2)
	{
		fz_point point;
		point.x = pdf_to_real(ctx, pdf_array_get(ctx, quad_points, idx * 8 + i + 0));
		point.y = pdf_to_real(ctx, pdf_array_get(ctx, quad_points, idx * 8 + i + 1));
		fz_transform_point(&point, &page_ctm);
		v[i+0] = point.x;
		v[i+1] = point.y;
	}
}

void
pdf_set_annot_quad_points(fz_context *ctx, pdf_annot *annot, int n, const float *v)
{
	pdf_document *doc = annot->page->doc;
	fz_matrix page_ctm, inv_page_ctm;
	pdf_obj *quad_points;
	fz_point point;
	int i, k;

	check_allowed_subtypes(ctx, annot, PDF_NAME_QuadPoints, quad_point_subtypes);
	if (n <= 0 || !v)
		fz_throw(ctx, FZ_ERROR_GENERIC, "invalid number of quadrilaterals");

	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);
	fz_invert_matrix(&inv_page_ctm, &page_ctm);

	quad_points = pdf_new_array(ctx, doc, n * 8);
	for (i = 0; i < n; ++i)
	{
		for (k = 0; k < 4; ++k)
		{
			point.x = v[i * 8 + k * 2 + 0];
			point.y = v[i * 8 + k * 2 + 1];
			fz_transform_point(&point, &inv_page_ctm);
			pdf_array_push_drop(ctx, quad_points, pdf_new_real(ctx, doc, point.x));
			pdf_array_push_drop(ctx, quad_points, pdf_new_real(ctx, doc, point.y));
		}
	}
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_QuadPoints, quad_points);
	annot->changed = 1;
}

static pdf_obj *ink_list_subtypes[] = {
	PDF_NAME_Ink,
	NULL,
};

int
pdf_annot_has_ink_list(fz_context *ctx, pdf_annot *annot)
{
	return is_allowed_subtype(ctx, annot, PDF_NAME_InkList, ink_list_subtypes);
}

int
pdf_annot_ink_list_count(fz_context *ctx, pdf_annot *annot)
{
	pdf_obj *ink_list;
	check_allowed_subtypes(ctx, annot, PDF_NAME_InkList, ink_list_subtypes);
	ink_list = pdf_dict_get(ctx, annot->obj, PDF_NAME_InkList);
	return pdf_array_len(ctx, ink_list);
}

int
pdf_annot_ink_list_stroke_count(fz_context *ctx, pdf_annot *annot, int i)
{
	pdf_obj *ink_list;
	pdf_obj *stroke;
	check_allowed_subtypes(ctx, annot, PDF_NAME_InkList, ink_list_subtypes);
	ink_list = pdf_dict_get(ctx, annot->obj, PDF_NAME_InkList);
	stroke = pdf_array_get(ctx, ink_list, i);
	return pdf_array_len(ctx, stroke) / 2;
}

void
pdf_annot_ink_list_stroke_vertex(fz_context *ctx, pdf_annot *annot, int i, int k, float v[2])
{
	pdf_obj *ink_list;
	pdf_obj *stroke;
	fz_matrix page_ctm;
	fz_point point = { 0, 0 };

	check_allowed_subtypes(ctx, annot, PDF_NAME_InkList, ink_list_subtypes);

	ink_list = pdf_dict_get(ctx, annot->obj, PDF_NAME_InkList);
	stroke = pdf_array_get(ctx, ink_list, i);

	if (v)
	{
		pdf_page_transform(ctx, annot->page, NULL, &page_ctm);

		point.x = pdf_to_real(ctx, pdf_array_get(ctx, stroke, k * 2 + 0));
		point.y = pdf_to_real(ctx, pdf_array_get(ctx, stroke, k * 2 + 1));
		fz_transform_point(&point, &page_ctm);

		v[0] = point.x;
		v[1] = point.y;
	}
}

void
pdf_set_annot_ink_list(fz_context *ctx, pdf_annot *annot, int n, const int *count, const float *v)
{
	pdf_document *doc = annot->page->doc;
	fz_matrix page_ctm, inv_page_ctm;
	pdf_obj *ink_list, *stroke;
	fz_point point;
	int i, k;

	check_allowed_subtypes(ctx, annot, PDF_NAME_InkList, ink_list_subtypes);

	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);
	fz_invert_matrix(&inv_page_ctm, &page_ctm);

	// TODO: update Rect (in update appearance perhaps?)

	ink_list = pdf_new_array(ctx, doc, n);
	for (i = 0; i < n; ++i)
	{
		stroke = pdf_new_array(ctx, doc, count[i]);
		for (k = 0; k < count[i]; ++k)
		{
			point.x = *v++;
			point.y = *v++;
			fz_transform_point(&point, &inv_page_ctm);
			pdf_array_push_drop(ctx, stroke, pdf_new_real(ctx, doc, point.x));
			pdf_array_push_drop(ctx, stroke, pdf_new_real(ctx, doc, point.y));
		}
		pdf_array_push_drop(ctx, ink_list, stroke);
	}
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_InkList, ink_list);
	annot->changed = 1;
}

static void find_free_font_name(fz_context *ctx, pdf_obj *fdict, char *buf, int buf_size)
{
	int i;

	/* Find a number X such that /FX doesn't occur as a key in fdict */
	for (i = 0; 1; i++)
	{
		fz_snprintf(buf, buf_size, "F%d", i);

		if (!pdf_dict_gets(ctx, fdict, buf))
			break;
	}
}

void
pdf_set_text_annot_position(fz_context *ctx, pdf_annot *annot, fz_point pt)
{
	pdf_document *doc = annot->page->doc;
	fz_matrix page_ctm, inv_page_ctm;
	fz_rect rect;
	int flags;

	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);
	fz_invert_matrix(&inv_page_ctm, &page_ctm);

	rect.x0 = pt.x;
	rect.x1 = pt.x + TEXT_ANNOT_SIZE;
	rect.y0 = pt.y;
	rect.y1 = pt.y + TEXT_ANNOT_SIZE;
	fz_transform_rect(&rect, &inv_page_ctm);

	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Rect, pdf_new_rect(ctx, doc, &rect));

	flags = pdf_to_int(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_F));
	flags |= (PDF_ANNOT_IS_NO_ZOOM|PDF_ANNOT_IS_NO_ROTATE);
	pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_F, pdf_new_int(ctx, doc, flags));
}

const char *
pdf_annot_author(fz_context *ctx, pdf_annot *annot)
{
	return pdf_to_str_buf(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_T));
}

const char *
pdf_annot_date(fz_context *ctx, pdf_annot *annot)
{
	// TODO: PDF_NAME_M
	return pdf_to_str_buf(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_CreationDate));
}

pdf_obj *
pdf_annot_irt(fz_context *ctx, pdf_annot *annot)
{
	return pdf_dict_get(ctx, annot->obj, PDF_NAME_IRT);
}

void
pdf_set_free_text_details(fz_context *ctx, pdf_annot *annot, fz_point *pos, char *text, char *font_name, float font_size, float color[3])
{
	pdf_document *doc = annot->page->doc;
	char nbuf[32];
	pdf_obj *dr;
	pdf_obj *form_fonts;
	pdf_obj *font = NULL;
	pdf_obj *ref;
	pdf_font_desc *font_desc = NULL;
	fz_matrix page_ctm, inv_page_ctm;
	pdf_da_info da_info;
	fz_buffer *fzbuf = NULL;
	fz_point page_pos;

	pdf_page_transform(ctx, annot->page, NULL, &page_ctm);
	fz_invert_matrix(&inv_page_ctm, &page_ctm);

	dr = pdf_dict_get(ctx, annot->page->obj, PDF_NAME_Resources);
	if (!dr)
	{
		dr = pdf_new_dict(ctx, doc, 1);
		pdf_dict_put_drop(ctx, annot->page->obj, PDF_NAME_Resources, dr);
	}

	/* Ensure the resource dictionary includes a font dict */
	form_fonts = pdf_dict_get(ctx, dr, PDF_NAME_Font);
	if (!form_fonts)
	{
		form_fonts = pdf_new_dict(ctx, doc, 1);
		pdf_dict_put_drop(ctx, dr, PDF_NAME_Font, form_fonts);
		/* form_fonts is still valid if execution continues past the above call */
	}

	fz_var(fzbuf);
	fz_var(font);
	fz_try(ctx)
	{
		unsigned char *da_str;
		size_t da_len;
		fz_rect bounds;

		find_free_font_name(ctx, form_fonts, nbuf, sizeof(nbuf));

		font = pdf_new_dict(ctx, doc, 5);
		ref = pdf_add_object(ctx, doc, font);
		pdf_dict_puts_drop(ctx, form_fonts, nbuf, ref);

		pdf_dict_put_drop(ctx, font, PDF_NAME_Type, PDF_NAME_Font);
		pdf_dict_put_drop(ctx, font, PDF_NAME_Subtype, PDF_NAME_Type1);
		pdf_dict_put_drop(ctx, font, PDF_NAME_BaseFont, pdf_new_name(ctx, doc, font_name));
		pdf_dict_put_drop(ctx, font, PDF_NAME_Encoding, PDF_NAME_WinAnsiEncoding);

		memcpy(da_info.col, color, sizeof(float)*3);
		da_info.col_size = 3;
		da_info.font_name = nbuf;
		da_info.font_size = font_size;

		fzbuf = fz_new_buffer(ctx, 0);
		pdf_fzbuf_print_da(ctx, fzbuf, &da_info);

		da_len = fz_buffer_storage(ctx, fzbuf, &da_str);
		pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_DA, pdf_new_string(ctx, doc, (char *)da_str, da_len));

		/* FIXME: should convert to WinAnsiEncoding */
		pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Contents, pdf_new_string(ctx, doc, text, strlen(text)));

		font_desc = pdf_load_font(ctx, doc, NULL, font, 0);
		pdf_measure_text(ctx, font_desc, (unsigned char *)text, strlen(text), &bounds);

		page_pos = *pos;
		fz_transform_point(&page_pos, &inv_page_ctm);

		bounds.x0 *= font_size;
		bounds.x1 *= font_size;
		bounds.y0 *= font_size;
		bounds.y1 *= font_size;

		bounds.x0 += page_pos.x;
		bounds.x1 += page_pos.x;
		bounds.y0 += page_pos.y;
		bounds.y1 += page_pos.y;

		pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Rect, pdf_new_rect(ctx, doc, &bounds));
	}
	fz_always(ctx)
	{
		pdf_drop_obj(ctx, font);
		fz_drop_buffer(ctx, fzbuf);
		pdf_drop_font(ctx, font_desc);
	}
	fz_catch(ctx)
	{
		fz_rethrow(ctx);
	}
}