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
|
/*
* viz.c - Visualize matches.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "types.h"
#include "viz.h"
/*
static size_t utf8_len(const char *s)
{
size_t len = 0;
while (*s) {
len += (*s++ & 0xC0) != 0x80;
}
return len;
}
*/
static int match_height(match_t *m)
{
int height = 0;
for (match_t *c = m->child; c; c = c->nextsibling) {
int childheight = match_height(c);
if (childheight > height) height = childheight;
}
return 1 + height;
}
static void _visualize_matches(match_node_t *firstmatch, int depth, const char *text, size_t textlen)
{
if (!firstmatch) return;
const char *V = "│"; // Vertical bar
const char *H = "─"; // Horizontal bar
const char *color = (depth % 2 == 0) ? "34" : "33";
match_t *viz = firstmatch->m;
for (match_node_t *p = firstmatch; p; p = p->next)
if (match_height(p->m) > match_height(viz))
viz = p->m;
const char *viz_type = viz->op->start;
size_t viz_typelen = (size_t)(viz->op->end - viz->op->start);
printf("\033[%ldG\033[%s;1m", 2*textlen+3, color);
for (size_t i = 0; i < viz_typelen; i++) {
switch (viz_type[i]) {
case '\n': printf("↵"); break;
default: printf("%c", viz_type[i]); break;
}
}
printf("\033[0m");
match_node_t *children = NULL;
match_node_t **nextchild = &children;
#define RIGHT_TYPE(m) (m->m->op->end == m->m->op->start + viz_typelen && strncmp(m->m->op->start, viz_type, viz_typelen) == 0)
// Print nonzero-width first:
for (match_node_t *m = firstmatch; m; m = m->next) {
//tree_text = byteslice(text, tree['start'], tree['end']).replace('\n', '↵')
if (RIGHT_TYPE(m)) {
//if (m->m->op->op != VM_REF) {
for (match_t *c = m->m->child; c; c = c->nextsibling) {
*nextchild = calloc(1, sizeof(match_node_t));
(*nextchild)->m = c;
nextchild = &((*nextchild)->next);
}
//}
if (m->m->end == m->m->start) continue;
printf("\033[%ldG\033[0;2m%s\033[0;7;%sm", 1+2*(m->m->start - text), V, color);
for (const char *c = m->m->start; c < m->m->end; ++c) {
// TODO: newline
if (c > m->m->start) printf(" ");
// TODO: utf8
//while ((*c & 0xC0) != 0x80) printf("%c", *(c++));
printf("%c", *c);
}
printf("\033[0;2m%s\033[0m", V);
} else {
*nextchild = calloc(1, sizeof(match_node_t));
(*nextchild)->m = m->m;
nextchild = &((*nextchild)->next);
printf("\033[%ldG\033[0;2m%s", 1+2*(m->m->start - text), V);
for (ssize_t i = (ssize_t)(2*(m->m->end - m->m->start)-1); i > 0; i--)
printf(" ");
if (m->m->end > m->m->start)
printf("\033[0;2m%s", V);
printf("\033[0m");
}
}
// Print stars for zero-width:
for (match_node_t *m = firstmatch; m; m = m->next) {
if (m->m->end > m->m->start) continue;
if (RIGHT_TYPE(m)) {
printf("\033[%ldG\033[7;%sm▒\033[0m", 1+2*(m->m->start - text), color);
} else {
printf("\033[%ldG\033[0;2m%s\033[0m", 1+2*(m->m->start - text), V);
}
}
printf("\n");
for (match_node_t *m = firstmatch; m; m = m->next) {
if (m->m->end == m->m->start) {
if (!RIGHT_TYPE(m))
printf("\033[%ldG\033[0;2m%s", 1 + 2*(m->m->start - text), V);
} else {
const char *l = "└";
const char *r = "┘";
for (match_node_t *c = children; c; c = c->next) {
if (c->m->start == m->m->start || c->m->end == m->m->start) l = V;
if (c->m->start == m->m->end || c->m->end == m->m->end) r = V;
}
printf("\033[%ldG\033[0;2m%s", 1 + 2*(m->m->start - text), l);
const char *h = RIGHT_TYPE(m) ? H : " ";
for (ssize_t n = (ssize_t)(2*(m->m->end - m->m->start) - 1); n > 0; n--)
printf("%s", h);
printf("%s\033[0m", r);
}
}
#undef RIGHT_TYPE
printf("\n");
if (children)
_visualize_matches(children, depth+1, text, textlen);
for (match_node_t *c = children, *next = NULL; c; c = next) {
next = c->next;
free(c);
}
}
static void _visualize_patterns(match_t *m)
{
if (m->op->op == VM_REF && strcmp(m->op->args.s, "pattern") == 0) {
m = m->child;
match_node_t first = {.m = m};
_visualize_matches(&first, 0, m->start, (size_t)(m->end - m->start));
} else {
for (match_t *c = m->child; c; c = c->nextsibling)
_visualize_patterns(c);
}
}
void visualize_match(match_t *m)
{
printf("\033[?7l");
//match_node_t first = {.m = m};
//_visualize_matches(&first, 0, m->start, (m->end - m->start));
_visualize_patterns(m);
printf("\033[?7h");
}
|
