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vt: implement 'insert mode'

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Daniel Eklöf 2019-08-30 22:08:37 +02:00
parent f4291690ee
commit 2707cf0fc4
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GPG key ID: 5BBD4992C116573F
1 changed files with 28 additions and 19 deletions
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47
vt.c
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@ -12,6 +12,8 @@
#include "grid.h"
#include "osc.h"
#define max(x, y) ((x) > (y) ? (x) : (y))
#define UNHANDLED() LOG_ERR("unhandled: %s", esc_as_string(term, final))
/* https://vt100.net/emu/dec_ansi_parser */
@ -703,17 +705,21 @@ post_print(struct terminal *term)
}
static inline void
print_insert(struct terminal *term)
print_insert(struct terminal *term, int width)
{
if (unlikely(term->insert_mode)) {
assert(false && "untested");
struct row *row = term->grid->cur_row;
const size_t move_count = max(0, term->cols - term->cursor.col - width);
struct row *row = term->grid->cur_row;
memmove(
&row[term->cursor.col + 1],
&row[term->cursor.col],
term->cols - term->cursor.col - 1);
}
memmove(
&row->cells[term->cursor.col + width],
&row->cells[term->cursor.col],
move_count * sizeof(struct cell));
/* Mark moved cells as dirty */
for (size_t i = term->cursor.col + width; i < term->cols; i++)
row->cells[i].attrs.clean = 0;
}
}
static void
@ -724,20 +730,23 @@ action_print_utf8(struct terminal *term)
struct row *row = term->grid->cur_row;
struct cell *cell = &row->cells[term->cursor.col];
row->dirty = true;
cell->attrs.clean = 0;
print_insert(term);
/* Convert to wchar */
mbstate_t ps = {0};
if (mbrtowc(&cell->wc, (const char *)term->vt.utf8.data, term->vt.utf8.idx, &ps) < 0)
cell->wc = 0;
term->vt.utf8.idx = 0;
wchar_t wc;
if (mbrtowc(&wc, (const char *)term->vt.utf8.data, term->vt.utf8.idx, &ps) < 0)
wc = 0;
int width = wcwidth(wc);
print_insert(term, width);
row->dirty = true;
cell->wc = wc;
cell->attrs.clean = 0;
cell->attrs = term->vt.attrs;
int width = wcwidth(cell->wc);
/* Reset VT utf8 state */
term->vt.utf8.idx = 0;
if (width <= 0) {
/* Skip post_print() below - i.e. don't advance cursor */
return;
@ -768,7 +777,7 @@ action_print(struct terminal *term, uint8_t c)
row->dirty = true;
cell->attrs.clean = 0;
print_insert(term);
print_insert(term, 1);
/* 0x60 - 0x7e */
static const wchar_t vt100_0[] = {