about summary refs log tree commit diff
path: root/Src/Zle/textobjects.c
blob: bf83906f220d015b9150ad258a1a6b23fd3f98d4 (plain) (blame)
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
/*
 * textobjects.c - ZLE widgets implementing Vim style text objects
 *
 * This file is part of zsh, the Z shell.
 *
 * Copyright (c) 2014 Oliver Kiddle
 * All rights reserved.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and to distribute modified versions of this software for any
 * purpose, provided that the above copyright notice and the following
 * two paragraphs appear in all copies of this software.
 *
 * In no event shall Oliver Kiddle or the Zsh Development Group be liable
 * to any party for direct, indirect, special, incidental, or consequential
 * damages arising out of the use of this software and its documentation,
 * even if Oliver Kiddle and the Zsh Development Group have been advised of
 * the possibility of such damage.
 *
 * Oliver Kiddle and the Zsh Development Group specifically disclaim any
 * warranties, including, but not limited to, the implied warranties of
 * merchantability and fitness for a particular purpose.  The software
 * provided hereunder is on an "as is" basis, and Oliver Kiddle and the
 * Zsh Development Group have no obligation to provide maintenance,
 * support, updates, enhancements, or modifications.
 *
 */

#include "zle.mdh"
#include "textobjects.pro"

/* class of character: 0 is whitespace, 1 is word character, 2 is other */
static int
wordclass(ZLE_CHAR_T x)
{
    return (ZC_iblank(x) ? 0 : ((ZC_ialnum(x) || (ZWC('_') == x)) ? 1 : 2));
}

static int
blankwordclass(ZLE_CHAR_T x)
{
    return (ZC_iblank(x) ? 0 : 1);
}

/**/
int
selectword(UNUSED(char **args))
{
    int n = zmult;
    int all = IS_THINGY(bindk, selectaword) ||
	IS_THINGY(bindk, selectablankword);
    int (*viclass)(ZLE_CHAR_T) = (IS_THINGY(bindk, selectaword) ||
	    IS_THINGY(bindk, selectinword)) ? wordclass : blankwordclass;
    int sclass = viclass(zleline[zlecs]);
    int doblanks = all && sclass;

    if (!region_active || zlecs == mark || mark == -1) {
	/* search back to first character of same class as the start position
	 * also stop at the beginning of the line */
	mark = zlecs;
	while (mark) {
	    int pos = mark;
	    DECPOS(pos);
	    if (zleline[pos] == ZWC('\n') || viclass(zleline[pos]) != sclass)
		break;
	    mark = pos;
	}
	/* similarly scan forward over characters of the same class */
	while (zlecs < zlell) {
	    INCCS();
	    int pos = zlecs;
	    /* single newlines within blanks are included */
	    if (all && !sclass && pos < zlell && zleline[pos] == ZWC('\n'))
		INCPOS(pos);

	    if (zleline[pos] == ZWC('\n') || viclass(zleline[pos]) != sclass)
		break;
	}

	if (all) {
	    int nclass = viclass(zleline[zlecs]);
	    /* if either start or new position is blank advance over
	     * a new block of characters of a common type */
	    if (!nclass || !sclass) {
		while (zlecs < zlell) {
		    INCCS();
		    if (zleline[zlecs] == ZWC('\n') ||
			    viclass(zleline[zlecs]) != nclass)
			break;
		}
		if (n < 2)
		    doblanks = 0;
	    }
	}
    } else {
	/* For visual mode, advance one char so repeated
	 * invocations select subsequent words */
	if (zlecs > mark) {
	    if (zlecs < zlell)
		INCCS();
	} else if (zlecs)
	    DECCS();
	if (zlecs < mark) {
	    /* visual mode with the cursor before the mark: move cursor back */
	    while (n-- > 0) {
		int pos = zlecs;
		/* first over blanks */
		if (all && (!viclass(zleline[pos]) ||
			zleline[pos] == ZWC('\n'))) {
		    all = 0;
		    while (pos) {
			DECPOS(pos);
			if (zleline[pos] == ZWC('\n'))
			    break;
			zlecs = pos;
			if (viclass(zleline[pos]))
			    break;
		    }
		} else if (zlecs && zleline[zlecs] == ZWC('\n')) {
		    /* for in widgets pass over one newline */
		    DECPOS(pos);
		    if (zleline[pos] != ZWC('\n'))
			zlecs = pos;
		}
		pos = zlecs;
		sclass = viclass(zleline[zlecs]);
		/* now retreat over non-blanks */
		while (zleline[pos] != ZWC('\n') &&
			viclass(zleline[pos]) == sclass) {
		    zlecs = pos;
		    if (!pos) {
			zlecs = 0;
			break;
		    }
		    DECPOS(pos);
		}
		/* blanks again but only if there were none first time */
		if (all && zlecs) {
		    pos = zlecs;
		    DECPOS(pos);
		    if (!viclass(zleline[pos])) {
			while (pos) {
			    DECPOS(pos);
			    if (zleline[pos] == ZWC('\n') ||
				    viclass(zleline[pos]))
				break;
			    zlecs = pos;
			}
		    }
		}
	    }
	    return 0;
	}
	n++;
	doblanks = 0;
    }
    region_active = !!region_active; /* force to character wise */

    /* for each digit argument, advance over further block of one class */
    while (--n > 0) {
	if (zlecs < zlell && zleline[zlecs] == ZWC('\n'))
	    INCCS();
	sclass = viclass(zleline[zlecs]);
	while (zlecs < zlell) {
	    INCCS();
	    if (zleline[zlecs] == ZWC('\n') ||
		    viclass(zleline[zlecs]) != sclass)
		break;
	}
	/* for 'a' widgets, advance extra block if either consists of blanks */
	if (all) {
	    if (zlecs < zlell && zleline[zlecs] == ZWC('\n'))
		INCCS();
	    if (!sclass || !viclass(zleline[zlecs]) ) {
		sclass = viclass(zleline[zlecs]);
		if (n == 1 && !sclass)
		    doblanks = 0;
		while (zlecs < zlell) {
		    INCCS();
		    if (zleline[zlecs] == ZWC('\n') ||
			    viclass(zleline[zlecs]) != sclass)
			break;
		}
	    }
	}
    }

    /* if we didn't remove blanks at either end we remove some at the start */
    if (doblanks) {
	int pos = mark;
	while (pos) {
	    DECPOS(pos);
	    /* don't remove blanks at the start of the line, i.e indentation */
	    if (zleline[pos] == ZWC('\n'))
		break;
	    if (!ZC_iblank(zleline[pos])) {
		INCPOS(pos);
		mark = pos;
		break;
	    }
	}
    }
    /* Adjustment: vi operators don't include the cursor position, in insert
     * or emacs mode the region also doesn't but for vi visual mode it is
     * included. */
    if (!virangeflag) {
	if (!invicmdmode())
	    region_active = 1;
	else if (zlecs && zlecs > mark)
	    DECCS();
    }

    return 0;
}

/**/
int
selectargument(UNUSED(char **args))
{
    int ne = noerrs, ocs = zlemetacs;
    int owb = wb, owe= we, oadx = addedx, ona = noaliases;
    char *p;
    int ll, cs;
    char *linein;
    int wend = 0, wcur = 0;
    int n = zmult;
    int *wstarts;
    int tmpsz;

    if (n < 1 || 2*n > zlell + 1)
	return 1;

    /* if used from emacs mode enable the region */
    if (!invicmdmode()) {
	region_active = 1;
	mark = zlecs;
    }

    wstarts = (int *) zhalloc(n * sizeof(int));
    memset(wstarts, 0, n * sizeof(int));

    addedx = 0;
    noerrs = 1;
    zcontext_save();
    lexflags = LEXFLAGS_ACTIVE;
    linein = zlegetline(&ll, &cs);
    zlemetall = ll;
    zlemetacs = cs;

    if (!isfirstln && chline) {
       p = (char *) zhalloc(hptr - chline + zlemetall + 2);
       memcpy(p, chline, hptr - chline);
       memcpy(p + (hptr - chline), linein, ll);
       p[(hptr - chline) + ll] = '\0';
       inpush(p, 0, NULL);
       zlemetacs += hptr - chline;
    } else {
       p = (char *) zhalloc(ll + 1);
       memcpy(p, linein, ll);
       p[ll] = '\0';
       inpush(p, 0, NULL);
    }
    if (zlemetacs)
       zlemetacs--;
    strinbeg(0);
    noaliases = 1;
    do {
       wstarts[wcur++] = wend;
       wcur %= n;
       ctxtlex();
       if (tok == ENDINPUT || tok == LEXERR)
           break;
       wend = zlemetall - inbufct;
    } while (tok != ENDINPUT && tok != LEXERR && wend <= zlemetacs);
    noaliases = ona;
    strinend();
    inpop();
    errflag &= ~ERRFLAG_ERROR;
    noerrs = ne;
    zcontext_restore();
    zlemetacs = ocs;
    wb = owb;
    we = owe;
    addedx = oadx;

    /* convert offsets for mark and zlecs back to ZLE internal format */
    linein[wend] = '\0'; /* a bit of a hack to get two offsets */
    free(stringaszleline(linein, wstarts[wcur], &zlecs, &tmpsz, &mark));
    free(linein);

    if (IS_THINGY(bindk, selectinshellword)) {
	ZLE_CHAR_T *match = ZWS("`\'\"");
	ZLE_CHAR_T *lmatch = ZWS("\'({"), *rmatch = ZWS("\')}");
	ZLE_CHAR_T *ematch = match, *found;
	int start, end = zlecs;
	/* for 'in' widget, don't include initial blanks ... */
	while (mark < zlecs && ZC_iblank(zleline[mark]))
	    INCPOS(mark);
	/* ... or a matching pair of quotes */
	start = mark;
	if (zleline[start] == ZWC('$')) {
	    match = lmatch;
	    ematch = rmatch;
	    INCPOS(start);
	}
	found = ZS_strchr(match, zleline[start]);
	if (found) {
	    DECPOS(end);
	    if (zleline[end] == ematch[found-match]) {
		zlecs = end;
		INCPOS(start);
		mark = start;
	    }
	}
    }

    /* Adjustment: vi operators don't include the cursor position */
    if (!virangeflag && invicmdmode())
       DECCS();

    return 0;
}