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Copy pathvterm_erase.c
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153 lines (117 loc) · 3.77 KB
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#include "vterm.h"
#include "vterm_private.h"
#include "vterm_render.h"
#include "vterm_buffer.h"
void
vterm_erase(vterm_t *vterm, int idx, char fill_char)
{
vterm_desc_t *v_desc = NULL;
int r;
if(vterm == NULL) return;
// use a space if no fill char is specified
if(fill_char == 0) fill_char = ' ';
// a value of -1 means current, active buffer
if(idx == -1)
{
v_desc = vterm->v_desc_active;
}
else
{
v_desc = &vterm->vterm_desc[idx];
}
// post event that term is about to be erased
if(vterm->event_mask & VTERM_MASK_TERM_PRECLEAR)
{
if(vterm->event_hook != NULL)
{
vterm->event_hook(vterm,
VTERM_EVENT_TERM_PRECLEAR, NULL);
}
}
for(r = 0;r < v_desc->rows; r++)
{
vterm_fill_span(v_desc, r, 0, v_desc->cols - 1,
(wchar_t)fill_char, A_NORMAL, v_desc->default_colors);
}
return;
}
void
vterm_erase_row(vterm_t *vterm, int row, bool reset_colors, char fill_char)
{
vterm_desc_t *v_desc = NULL;
if(vterm == NULL) return;
if(fill_char == 0) fill_char = ' ';
// set the vterm description buffer selector
v_desc = vterm->v_desc_active;
if(row == -1) row = v_desc->crow;
/*
reset_colors TRUE -> blank with the default pair (NEL / RI).
reset_colors FALSE -> blank with the CURRENT pair (BCE), matching
EL/ED/ECH/SU/SD/IL/DL and xterm. This path clears the row a
newline-scroll just recycled; using -1 (preserve each cell's old
colors) left the stale background of whatever previously occupied
that row -- e.g. an inline-code span's gray bg -- and apps that
rely on the scrolled-in line being clean (glow, which emits no
\e[K after redrawing) showed it bleeding down the screen.
*/
vterm_fill_span(v_desc, row, 0, v_desc->cols - 1,
(wchar_t)fill_char, A_NORMAL,
reset_colors == TRUE ? v_desc->default_colors : v_desc->colors);
return;
}
void
vterm_erase_rows(vterm_t *vterm, int start_row, char fill_char)
{
vterm_desc_t *v_desc = NULL;
if(vterm == NULL) return;
if(start_row < 0) return;
if(fill_char == 0) fill_char = ' ';
// set the vterm description buffer selector
v_desc = vterm->v_desc_active;
while(start_row < v_desc->rows)
{
vterm_erase_row(vterm, start_row, FALSE, fill_char);
start_row++;
}
return;
}
void
vterm_erase_col(vterm_t *vterm, int col, char fill_char)
{
vterm_desc_t *v_desc = NULL;
int r;
if(vterm == NULL) return;
if(fill_char == 0) fill_char = ' ';
// set the vterm description buffer selector
v_desc = vterm->v_desc_active;
if(col == -1) col = v_desc->ccol;
/* same pending-wrap guard as the cursor draw in vterm_wnd.c: ccol can
rest at cols, and an out-of-range col would store past each row */
if(col >= v_desc->cols) col = v_desc->cols - 1;
if(col < 0) col = 0;
// a vertical 1-wide span: one whole-cell store per row
for(r = 0; r < v_desc->rows; r++)
{
VCELL_SET_ALL(v_desc, r, col, (wchar_t)fill_char, A_NORMAL,
v_desc->default_colors);
}
return;
}
void
vterm_erase_cols(vterm_t *vterm, int start_col, char fill_char)
{
vterm_desc_t *v_desc = NULL;
int r;
if(vterm == NULL) return;
if(start_col < 0) return;
if(fill_char == 0) fill_char = ' ';
// set the vterm description buffer selector
v_desc = vterm->v_desc_active;
// row-major: one span per row instead of one full-rows pass per column
for(r = 0; r < v_desc->rows; r++)
{
vterm_fill_span(v_desc, r, start_col, v_desc->cols - 1,
(wchar_t)fill_char, A_NORMAL, v_desc->default_colors);
}
return;
}