Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/source/fitz/link.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 // Copyright (C) 2004-2023 Artifex Software, Inc.
2 //
3 // This file is part of MuPDF.
4 //
5 // MuPDF is free software: you can redistribute it and/or modify it under the
6 // terms of the GNU Affero General Public License as published by the Free
7 // Software Foundation, either version 3 of the License, or (at your option)
8 // any later version.
9 //
10 // MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12 // FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
13 // details.
14 //
15 // You should have received a copy of the GNU Affero General Public License
16 // along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
17 //
18 // Alternative licensing terms are available from the licensor.
19 // For commercial licensing, see <https://www.artifex.com/> or contact
20 // Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
21 // CA 94129, USA, for further information.
22
23 #include "mupdf/fitz.h"
24
25 #include <math.h>
26
27 fz_link *
28 fz_new_link_of_size(fz_context *ctx, int size, fz_rect rect, const char *uri)
29 {
30 fz_link *link = Memento_label(fz_calloc(ctx, 1, size), "fz_link");
31 link->refs = 1;
32 link->rect = rect;
33
34 fz_try(ctx)
35 link->uri = fz_strdup(ctx, uri);
36 fz_catch(ctx)
37 {
38 fz_drop_link(ctx, link);
39 fz_rethrow(ctx);
40 }
41
42 return link;
43 }
44
45 fz_link *
46 fz_keep_link(fz_context *ctx, fz_link *link)
47 {
48 return fz_keep_imp(ctx, link, &link->refs);
49 }
50
51 void
52 fz_drop_link(fz_context *ctx, fz_link *link)
53 {
54 while (fz_drop_imp(ctx, link, &link->refs))
55 {
56 fz_link *next = link->next;
57
58 if (link->drop)
59 link->drop(ctx, link);
60
61 fz_free(ctx, link->uri);
62 fz_free(ctx, link);
63 link = next;
64 }
65 }
66
67 int
68 fz_is_external_link(fz_context *ctx, const char *uri)
69 {
70 const char *mark;
71 /* Basically, this function returns true, if the URI starts with
72 * a valid 'scheme' followed by ':'. */
73
74 if (!uri)
75 return 0;
76
77 /* All schemes must start with a letter; exit if we don't. */
78 if ((*uri < 'a' || *uri > 'z') && (*uri < 'A' || *uri > 'Z'))
79 return 0;
80 uri++;
81
82 mark = uri;
83
84 /* Subsequent characters can be letters, digits, +, -, or . */
85 while ((*uri >= 'a' && *uri <= 'z') ||
86 (*uri >= 'A' && *uri <= 'Z') ||
87 (*uri >= '0' && *uri <= '9') ||
88 (*uri == '+') ||
89 (*uri == '-') ||
90 (*uri == '.'))
91 ++uri;
92
93 return uri[0] == ':' && (uri - mark) > 1;
94 }
95
96 fz_link_dest fz_make_link_dest_none(void)
97 {
98 fz_link_dest dest = { { -1, -1 }, FZ_LINK_DEST_XYZ, NAN, NAN, NAN, NAN, NAN };
99 return dest;
100 }
101
102 fz_link_dest fz_make_link_dest_xyz(int chapter, int page, float x, float y, float z)
103 {
104 fz_link_dest dest = { { chapter, page }, FZ_LINK_DEST_XYZ, x, y, NAN, NAN, z };
105 return dest;
106 }