vis
a vi-like editor based on Plan 9's structural regular expressions
git clone https://9o.is/git/vis.git
vis-text-objects.c
(4928B)
1 #include "vis-core.h"
2 #include "text-objects.h"
3 #include "util.h"
4
5 int vis_textobject_register(Vis *vis, int type, void *data, VisTextObjectFunction *textobject) {
6
7 TextObject *obj = calloc(1, sizeof *obj);
8 if (!obj)
9 return -1;
10
11 obj->user = textobject;
12 obj->type = type;
13 obj->data = data;
14
15 if (array_add_ptr(&vis->textobjects, obj))
16 return LENGTH(vis_textobjects) + vis->textobjects.len - 1;
17 free(obj);
18 return -1;
19 }
20
21 bool vis_textobject(Vis *vis, enum VisTextObject id) {
22 if (id < LENGTH(vis_textobjects))
23 vis->action.textobj = &vis_textobjects[id];
24 else
25 vis->action.textobj = array_get_ptr(&vis->textobjects, id - LENGTH(vis_textobjects));
26 if (!vis->action.textobj)
27 return false;
28 vis_do(vis);
29 return true;
30 }
31
32 static Filerange search_forward(Vis *vis, Text *txt, size_t pos) {
33 Filerange range = text_range_empty();
34 Regex *regex = vis_regex(vis, NULL);
35 if (regex)
36 range = text_object_search_forward(txt, pos, regex);
37 text_regex_free(regex);
38 return range;
39 }
40
41 static Filerange search_backward(Vis *vis, Text *txt, size_t pos) {
42 Filerange range = text_range_empty();
43 Regex *regex = vis_regex(vis, NULL);
44 if (regex)
45 range = text_object_search_backward(txt, pos, regex);
46 text_regex_free(regex);
47 return range;
48 }
49
50 static Filerange object_unpaired(Text *txt, size_t pos, char obj) {
51 char c;
52 bool before = false;
53 Iterator it = text_iterator_get(txt, pos), rit = it;
54
55 while (text_iterator_byte_get(&rit, &c) && c != '\n') {
56 if (c == obj) {
57 before = true;
58 break;
59 }
60 text_iterator_byte_prev(&rit, NULL);
61 }
62
63 /* if there is no previous occurrence on the same line, advance starting position */
64 if (!before) {
65 while (text_iterator_byte_get(&it, &c) && c != '\n') {
66 if (c == obj) {
67 pos = it.pos;
68 break;
69 }
70 text_iterator_byte_next(&it, NULL);
71 }
72 }
73
74 switch (obj) {
75 case '"':
76 return text_object_quote(txt, pos);
77 case '\'':
78 return text_object_single_quote(txt, pos);
79 case '`':
80 return text_object_backtick(txt, pos);
81 default:
82 return text_range_empty();
83 }
84 }
85
86 static Filerange object_quote(Text *txt, size_t pos) {
87 return object_unpaired(txt, pos, '"');
88 }
89
90 static Filerange object_single_quote(Text *txt, size_t pos) {
91 return object_unpaired(txt, pos, '\'');
92 }
93
94 static Filerange object_backtick(Text *txt, size_t pos) {
95 return object_unpaired(txt, pos, '`');
96 }
97
98 const TextObject vis_textobjects[] = {
99 [VIS_TEXTOBJECT_INNER_WORD] = {
100 .txt = text_object_word,
101 },
102 [VIS_TEXTOBJECT_OUTER_WORD] = {
103 .txt = text_object_word_outer,
104 },
105 [VIS_TEXTOBJECT_INNER_LONGWORD] = {
106 .txt = text_object_longword,
107 },
108 [VIS_TEXTOBJECT_OUTER_LONGWORD] = {
109 .txt = text_object_longword_outer,
110 },
111 [VIS_TEXTOBJECT_SENTENCE] = {
112 .txt = text_object_sentence,
113 },
114 [VIS_TEXTOBJECT_PARAGRAPH] = {
115 .txt = text_object_paragraph,
116 },
117 [VIS_TEXTOBJECT_PARAGRAPH_OUTER] = {
118 .txt = text_object_paragraph_outer,
119 },
120 [VIS_TEXTOBJECT_OUTER_SQUARE_BRACKET] = {
121 .txt = text_object_square_bracket,
122 .type = TEXTOBJECT_DELIMITED_OUTER,
123 },
124 [VIS_TEXTOBJECT_INNER_SQUARE_BRACKET] = {
125 .txt = text_object_square_bracket,
126 .type = TEXTOBJECT_DELIMITED_INNER,
127 },
128 [VIS_TEXTOBJECT_OUTER_CURLY_BRACKET] = {
129 .txt = text_object_curly_bracket,
130 .type = TEXTOBJECT_DELIMITED_OUTER,
131 },
132 [VIS_TEXTOBJECT_INNER_CURLY_BRACKET] = {
133 .txt = text_object_curly_bracket,
134 .type = TEXTOBJECT_DELIMITED_INNER,
135 },
136 [VIS_TEXTOBJECT_OUTER_ANGLE_BRACKET] = {
137 .txt = text_object_angle_bracket,
138 .type = TEXTOBJECT_DELIMITED_OUTER,
139 },
140 [VIS_TEXTOBJECT_INNER_ANGLE_BRACKET] = {
141 .txt = text_object_angle_bracket,
142 .type = TEXTOBJECT_DELIMITED_INNER,
143 },
144 [VIS_TEXTOBJECT_OUTER_PARENTHESIS] = {
145 .txt = text_object_parenthesis,
146 .type = TEXTOBJECT_DELIMITED_OUTER,
147 },
148 [VIS_TEXTOBJECT_INNER_PARENTHESIS] = {
149 .txt = text_object_parenthesis,
150 .type = TEXTOBJECT_DELIMITED_INNER,
151 },
152 [VIS_TEXTOBJECT_OUTER_QUOTE] = {
153 .txt = object_quote,
154 .type = TEXTOBJECT_DELIMITED_OUTER,
155 },
156 [VIS_TEXTOBJECT_INNER_QUOTE] = {
157 .txt = object_quote,
158 .type = TEXTOBJECT_DELIMITED_INNER,
159 },
160 [VIS_TEXTOBJECT_OUTER_SINGLE_QUOTE] = {
161 .txt = object_single_quote,
162 .type = TEXTOBJECT_DELIMITED_OUTER,
163 },
164 [VIS_TEXTOBJECT_INNER_SINGLE_QUOTE] = {
165 .txt = object_single_quote,
166 .type = TEXTOBJECT_DELIMITED_INNER,
167 },
168 [VIS_TEXTOBJECT_OUTER_BACKTICK] = {
169 .txt = object_backtick,
170 .type = TEXTOBJECT_DELIMITED_OUTER,
171 },
172 [VIS_TEXTOBJECT_INNER_BACKTICK] = {
173 .txt = object_backtick,
174 .type = TEXTOBJECT_DELIMITED_INNER,
175 },
176 [VIS_TEXTOBJECT_OUTER_LINE] = {
177 .txt = text_object_line,
178 },
179 [VIS_TEXTOBJECT_INNER_LINE] = {
180 .txt = text_object_line_inner,
181 },
182 [VIS_TEXTOBJECT_INDENTATION] = {
183 .txt = text_object_indentation,
184 },
185 [VIS_TEXTOBJECT_SEARCH_FORWARD] = {
186 .vis = search_forward,
187 .type = TEXTOBJECT_NON_CONTIGUOUS|TEXTOBJECT_EXTEND_FORWARD,
188 },
189 [VIS_TEXTOBJECT_SEARCH_BACKWARD] = {
190 .vis = search_backward,
191 .type = TEXTOBJECT_NON_CONTIGUOUS|TEXTOBJECT_EXTEND_BACKWARD,
192 },
193 };
194