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
|
/* $OpenBSD: hyperlinks.c,v 1.2 2022/07/06 07:36:36 nicm Exp $ */
/*
* Copyright (c) 2021 Will <author@will.party>
* Copyright (c) 2022 Jeff Chiang <pobomp@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <vis.h>
#include "tmux.h"
/*
* OSC 8 hyperlinks, described at:
*
* https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
*
* Each hyperlink and ID combination is assigned a number ("inner" in this
* file) which is stored in an extended grid cell and maps into a tree here.
*
* Each URI has one inner number and one external ID (which tmux uses to send
* the hyperlink to the terminal) and one internal ID (which is received from
* the sending application inside tmux).
*
* Anonymous hyperlinks are each unique and are not reused even if they have
* the same URI (terminals will not want to tie them together).
*/
#define MAX_HYPERLINKS 5000
static uint64_t hyperlinks_next_external_id = 1;
static u_int global_hyperlinks_count;
struct hyperlinks_uri {
struct hyperlinks *tree;
u_int inner;
const char *internal_id;
const char *external_id;
const char *uri;
TAILQ_ENTRY(hyperlinks_uri) list_entry;
RB_ENTRY(hyperlinks_uri) by_inner_entry;
RB_ENTRY(hyperlinks_uri) by_uri_entry; /* by internal ID and URI */
};
RB_HEAD(hyperlinks_by_uri_tree, hyperlinks_uri);
RB_HEAD(hyperlinks_by_inner_tree, hyperlinks_uri);
TAILQ_HEAD(hyperlinks_list, hyperlinks_uri);
static struct hyperlinks_list global_hyperlinks =
TAILQ_HEAD_INITIALIZER(global_hyperlinks);
struct hyperlinks {
u_int next_inner;
struct hyperlinks_by_inner_tree by_inner;
struct hyperlinks_by_uri_tree by_uri;
};
static int
hyperlinks_by_uri_cmp(struct hyperlinks_uri *left, struct hyperlinks_uri *right)
{
int r;
if (*left->internal_id == '\0' || *right->internal_id == '\0') {
/*
* If both URIs are anonymous, use the inner for comparison so
* that they do not match even if the URI is the same - each
* anonymous URI should be unique.
*/
if (*left->internal_id != '\0')
return (-1);
if (*right->internal_id != '\0')
return (1);
return (left->inner - right->inner);
}
r = strcmp(left->internal_id, right->internal_id);
if (r != 0)
return (r);
return (strcmp(left->uri, right->uri));
}
RB_PROTOTYPE_STATIC(hyperlinks_by_uri_tree, hyperlinks_uri, by_uri_entry,
hyperlinks_by_uri_cmp);
RB_GENERATE_STATIC(hyperlinks_by_uri_tree, hyperlinks_uri, by_uri_entry,
hyperlinks_by_uri_cmp);
static int
hyperlinks_by_inner_cmp(struct hyperlinks_uri *left,
struct hyperlinks_uri *right)
{
return (left->inner - right->inner);
}
RB_PROTOTYPE_STATIC(hyperlinks_by_inner_tree, hyperlinks_uri, by_inner_entry,
hyperlinks_by_inner_cmp);
RB_GENERATE_STATIC(hyperlinks_by_inner_tree, hyperlinks_uri, by_inner_entry,
hyperlinks_by_inner_cmp);
/* Remove a hyperlink. */
static void
hyperlinks_remove(struct hyperlinks_uri *hlu)
{
struct hyperlinks *hl = hlu->tree;
TAILQ_REMOVE(&global_hyperlinks, hlu, list_entry);
global_hyperlinks_count--;
RB_REMOVE(hyperlinks_by_inner_tree, &hl->by_inner, hlu);
RB_REMOVE(hyperlinks_by_uri_tree, &hl->by_uri, hlu);
free((void *)hlu->internal_id);
free((void *)hlu->external_id);
free((void *)hlu->uri);
free(hlu);
}
/* Store a new hyperlink or return if it already exists. */
u_int
hyperlinks_put(struct hyperlinks *hl, const char *uri_in,
const char *internal_id_in)
{
struct hyperlinks_uri find, *hlu;
char *uri, *internal_id, *external_id;
/*
* Anonymous URI are stored with an empty internal ID and the tree
* comparator will make sure they never match each other (so each
* anonymous URI is unique).
*/
if (internal_id_in == NULL)
internal_id_in = "";
utf8_stravis(&uri, uri_in, VIS_OCTAL|VIS_CSTYLE);
utf8_stravis(&internal_id, internal_id_in, VIS_OCTAL|VIS_CSTYLE);
if (*internal_id_in != '\0') {
find.uri = uri;
find.internal_id = internal_id;
hlu = RB_FIND(hyperlinks_by_uri_tree, &hl->by_uri, &find);
if (hlu != NULL) {
free (uri);
free (internal_id);
return (hlu->inner);
}
}
xasprintf(&external_id, "tmux%llX", hyperlinks_next_external_id++);
hlu = xcalloc(1, sizeof *hlu);
hlu->inner = hl->next_inner++;
hlu->internal_id = internal_id;
hlu->external_id = external_id;
hlu->uri = uri;
hlu->tree = hl;
RB_INSERT(hyperlinks_by_uri_tree, &hl->by_uri, hlu);
RB_INSERT(hyperlinks_by_inner_tree, &hl->by_inner, hlu);
TAILQ_INSERT_TAIL(&global_hyperlinks, hlu, list_entry);
if (++global_hyperlinks_count == MAX_HYPERLINKS)
hyperlinks_remove(TAILQ_FIRST(&global_hyperlinks));
return (hlu->inner);
}
/* Get hyperlink by inner number. */
int
hyperlinks_get(struct hyperlinks *hl, u_int inner, const char **uri_out,
const char **internal_id_out, const char **external_id_out)
{
struct hyperlinks_uri find, *hlu;
find.inner = inner;
hlu = RB_FIND(hyperlinks_by_inner_tree, &hl->by_inner, &find);
if (hlu == NULL)
return (0);
if (internal_id_out != NULL)
*internal_id_out = hlu->internal_id;
if (external_id_out != NULL)
*external_id_out = hlu->external_id;
*uri_out = hlu->uri;
return (1);
}
/* Initialize hyperlink set. */
struct hyperlinks *
hyperlinks_init(void)
{
struct hyperlinks *hl;
hl = xcalloc(1, sizeof *hl);
hl->next_inner = 1;
RB_INIT(&hl->by_uri);
RB_INIT(&hl->by_inner);
return (hl);
}
/* Free all hyperlinks but not the set itself. */
void
hyperlinks_reset(struct hyperlinks *hl)
{
struct hyperlinks_uri *hlu, *hlu1;
RB_FOREACH_SAFE(hlu, hyperlinks_by_inner_tree, &hl->by_inner, hlu1)
hyperlinks_remove(hlu);
}
/* Free hyperlink set. */
void
hyperlinks_free(struct hyperlinks *hl)
{
hyperlinks_reset(hl);
free(hl);
}
|
