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vis-operators.c
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vis-operators.c
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#include <string.h>
#include <ctype.h>
#include "vis-core.h"
#include "text-motions.h"
#include "text-objects.h"
#include "text-util.h"
#include "util.h"
static size_t op_delete(Vis *vis, Text *txt, OperatorContext *c) {
c->reg->linewise = c->linewise;
register_slot_put_range(vis, c->reg, c->reg_slot, txt, &c->range);
text_delete_range(txt, &c->range);
size_t pos = c->range.start;
if (c->linewise && pos == text_size(txt))
pos = text_line_begin(txt, text_line_prev(txt, pos));
return pos;
}
static size_t op_change(Vis *vis, Text *txt, OperatorContext *c) {
bool linewise = c->linewise || text_range_is_linewise(txt, &c->range);
op_delete(vis, txt, c);
size_t pos = c->range.start;
if (linewise) {
size_t newpos = vis_text_insert_nl(vis, txt, pos > 0 ? pos-1 : pos);
if (pos > 0)
pos = newpos;
}
return pos;
}
static size_t op_yank(Vis *vis, Text *txt, OperatorContext *c) {
c->reg->linewise = c->linewise;
register_slot_put_range(vis, c->reg, c->reg_slot, txt, &c->range);
if (c->reg == &vis->registers[VIS_REG_DEFAULT]) {
vis->registers[VIS_REG_ZERO].linewise = c->reg->linewise;
register_slot_put_range(vis, &vis->registers[VIS_REG_ZERO], c->reg_slot, txt, &c->range);
}
return c->linewise ? c->pos : c->range.start;
}
static size_t op_put(Vis *vis, Text *txt, OperatorContext *c) {
char b;
size_t pos = c->pos;
bool sel = text_range_size(&c->range) > 0;
bool sel_linewise = sel && text_range_is_linewise(txt, &c->range);
if (sel) {
text_delete_range(txt, &c->range);
pos = c->pos = c->range.start;
}
switch (c->arg->i) {
case VIS_OP_PUT_AFTER:
case VIS_OP_PUT_AFTER_END:
if (c->reg->linewise && !sel_linewise)
pos = text_line_next(txt, pos);
else if (!sel && text_byte_get(txt, pos, &b) && b != '\n')
pos = text_char_next(txt, pos);
break;
case VIS_OP_PUT_BEFORE:
case VIS_OP_PUT_BEFORE_END:
if (c->reg->linewise)
pos = text_line_begin(txt, pos);
break;
}
size_t len;
const char *data = register_slot_get(vis, c->reg, c->reg_slot, &len);
for (int i = 0; i < c->count; i++) {
char nl;
if (c->reg->linewise && pos > 0 && text_byte_get(txt, pos-1, &nl) && nl != '\n')
pos += text_insert(txt, pos, "\n", 1);
text_insert(txt, pos, data, len);
pos += len;
if (c->reg->linewise && pos > 0 && text_byte_get(txt, pos-1, &nl) && nl != '\n')
pos += text_insert(txt, pos, "\n", 1);
}
if (c->reg->linewise) {
switch (c->arg->i) {
case VIS_OP_PUT_BEFORE_END:
case VIS_OP_PUT_AFTER_END:
pos = text_line_start(txt, pos);
break;
case VIS_OP_PUT_AFTER:
pos = text_line_start(txt, text_line_next(txt, c->pos));
break;
case VIS_OP_PUT_BEFORE:
pos = text_line_start(txt, c->pos);
break;
}
} else {
switch (c->arg->i) {
case VIS_OP_PUT_AFTER:
case VIS_OP_PUT_BEFORE:
pos = text_char_prev(txt, pos);
break;
}
}
return pos;
}
static size_t op_shift_right(Vis *vis, Text *txt, OperatorContext *c) {
char spaces[9] = " ";
spaces[MIN(vis->tabwidth, LENGTH(spaces) - 1)] = '\0';
const char *tab = vis->expandtab ? spaces : "\t";
size_t tablen = strlen(tab);
size_t pos = text_line_begin(txt, c->range.end), prev_pos;
size_t newpos = c->pos;
/* if range ends at the begin of a line, skip line break */
if (pos == c->range.end)
pos = text_line_prev(txt, pos);
bool multiple_lines = text_line_prev(txt, pos) >= c->range.start;
do {
size_t end = text_line_end(txt, pos);
prev_pos = pos = text_line_begin(txt, end);
if ((!multiple_lines || pos != end) &&
text_insert(txt, pos, tab, tablen) && pos <= c->pos)
newpos += tablen;
pos = text_line_prev(txt, pos);
} while (pos >= c->range.start && pos != prev_pos);
return newpos;
}
static size_t op_shift_left(Vis *vis, Text *txt, OperatorContext *c) {
size_t pos = text_line_begin(txt, c->range.end), prev_pos;
size_t tabwidth = vis->tabwidth, tablen;
size_t newpos = c->pos;
/* if range ends at the begin of a line, skip line break */
if (pos == c->range.end)
pos = text_line_prev(txt, pos);
do {
char b;
size_t len = 0;
prev_pos = pos = text_line_begin(txt, pos);
Iterator it = text_iterator_get(txt, pos);
if (text_iterator_byte_get(&it, &b) && b == '\t') {
len = 1;
} else {
for (len = 0; text_iterator_byte_get(&it, &b) && b == ' '; len++)
text_iterator_byte_next(&it, NULL);
}
tablen = MIN(len, tabwidth);
if (text_delete(txt, pos, tablen) && pos < c->pos) {
size_t delta = c->pos - pos;
if (delta > tablen)
delta = tablen;
if (delta > newpos)
delta = newpos;
newpos -= delta;
}
pos = text_line_prev(txt, pos);
} while (pos >= c->range.start && pos != prev_pos);
return newpos;
}
static size_t op_cursor(Vis *vis, Text *txt, OperatorContext *c) {
View *view = vis->win->view;
Filerange r = text_range_linewise(txt, &c->range);
for (size_t line = text_range_line_first(txt, &r); line != EPOS; line = text_range_line_next(txt, &r, line)) {
size_t pos;
if (c->arg->i == VIS_OP_CURSOR_EOL)
pos = text_line_finish(txt, line);
else
pos = text_line_start(txt, line);
view_selections_new_force(view, pos);
}
return EPOS;
}
static size_t op_join(Vis *vis, Text *txt, OperatorContext *c) {
size_t pos = text_line_begin(txt, c->range.end), prev_pos;
Mark mark = EMARK;
/* if operator and range are both linewise, skip last line break */
if (c->linewise && text_range_is_linewise(txt, &c->range)) {
size_t line_prev = text_line_prev(txt, pos);
size_t line_prev_prev = text_line_prev(txt, line_prev);
if (line_prev_prev >= c->range.start)
pos = line_prev;
}
size_t len = c->arg->s ? strlen(c->arg->s) : 0;
do {
prev_pos = pos;
size_t end = text_line_start(txt, pos);
pos = text_line_prev(txt, end);
if (pos < c->range.start || end <= pos)
break;
text_delete(txt, pos, end - pos);
char prev, next;
if (text_byte_get(txt, pos-1, &prev) && !isspace((unsigned char)prev) &&
text_byte_get(txt, pos, &next) && next != '\n')
text_insert(txt, pos, c->arg->s, len);
if (mark == EMARK)
mark = text_mark_set(txt, pos);
} while (pos != prev_pos);
size_t newpos = text_mark_get(txt, mark);
return newpos != EPOS ? newpos : c->range.start;
}
static size_t op_modeswitch(Vis *vis, Text *txt, OperatorContext *c) {
return c->newpos != EPOS ? c->newpos : c->pos;
}
static size_t op_replace(Vis *vis, Text *txt, OperatorContext *c) {
size_t count = 0;
Iterator it = text_iterator_get(txt, c->range.start);
while (it. pos < c->range.end && text_iterator_char_next(&it, NULL))
count++;
op_delete(vis, txt, c);
size_t pos = c->range.start;
for (size_t len = strlen(c->arg->s); count > 0; pos += len, count--)
text_insert(txt, pos, c->arg->s, len);
return c->range.start;
}
int vis_operator_register(Vis *vis, VisOperatorFunction *func, void *context) {
Operator *op = calloc(1, sizeof *op);
if (!op)
return -1;
op->func = func;
op->context = context;
if (array_add_ptr(&vis->operators, op))
return VIS_OP_LAST + array_length(&vis->operators) - 1;
free(op);
return -1;
}
bool vis_operator(Vis *vis, enum VisOperator id, ...) {
va_list ap;
va_start(ap, id);
switch (id) {
case VIS_OP_MODESWITCH:
vis->action.mode = va_arg(ap, int);
break;
case VIS_OP_CURSOR_SOL:
case VIS_OP_CURSOR_EOL:
vis->action.arg.i = id;
id = VIS_OP_CURSOR_SOL;
break;
case VIS_OP_PUT_AFTER:
case VIS_OP_PUT_AFTER_END:
case VIS_OP_PUT_BEFORE:
case VIS_OP_PUT_BEFORE_END:
vis->action.arg.i = id;
id = VIS_OP_PUT_AFTER;
break;
case VIS_OP_JOIN:
vis->action.arg.s = va_arg(ap, char*);
break;
case VIS_OP_SHIFT_LEFT:
case VIS_OP_SHIFT_RIGHT:
vis_motion_type(vis, VIS_MOTIONTYPE_LINEWISE);
break;
case VIS_OP_REPLACE:
{
Macro *macro = macro_get(vis, VIS_REG_DOT);
macro_reset(macro);
macro_append(macro, va_arg(ap, char*));
vis->action.arg.s = macro->data;
break;
}
case VIS_OP_DELETE:
{
enum VisMode mode = vis_mode_get(vis);
enum VisRegister reg = vis_register_used(vis);
if (reg == VIS_REG_DEFAULT && (mode == VIS_MODE_INSERT || mode == VIS_MODE_REPLACE))
vis_register(vis, VIS_REG_BLACKHOLE);
break;
}
default:
break;
}
const Operator *op = NULL;
if (id < LENGTH(vis_operators))
op = &vis_operators[id];
else
op = array_get_ptr(&vis->operators, id - VIS_OP_LAST);
if (!op)
goto err;
if (vis->mode->visual) {
vis->action.op = op;
vis_do(vis);
goto out;
}
/* switch to operator mode inorder to make operator options and
* text-object available */
vis_mode_switch(vis, VIS_MODE_OPERATOR_PENDING);
if (vis->action.op == op) {
/* hacky way to handle double operators i.e. things like
* dd, yy etc where the second char isn't a movement */
vis_motion_type(vis, VIS_MOTIONTYPE_LINEWISE);
vis_motion(vis, VIS_MOVE_LINE_NEXT);
} else {
vis->action.op = op;
}
/* put is not a real operator, does not need a range to operate on */
if (id == VIS_OP_PUT_AFTER)
vis_motion(vis, VIS_MOVE_NOP);
out:
va_end(ap);
return true;
err:
va_end(ap);
return false;
}
const Operator vis_operators[] = {
[VIS_OP_DELETE] = { op_delete },
[VIS_OP_CHANGE] = { op_change },
[VIS_OP_YANK] = { op_yank },
[VIS_OP_PUT_AFTER] = { op_put },
[VIS_OP_SHIFT_RIGHT] = { op_shift_right },
[VIS_OP_SHIFT_LEFT] = { op_shift_left },
[VIS_OP_JOIN] = { op_join },
[VIS_OP_MODESWITCH] = { op_modeswitch },
[VIS_OP_REPLACE] = { op_replace },
[VIS_OP_CURSOR_SOL] = { op_cursor },
};