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Set a flag on cells are genuinely empty (cleared and never written to)
and use tty_clear_line (which will choose the best escape sequence) to clear any batches of cells with that flag when redrawing a line from the stored screen.
This commit is contained in:
nicm
parent
938156d73b
commit
b2bc34af12
78
grid.c
78
grid.c
@ -39,8 +39,13 @@
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const struct grid_cell grid_default_cell = {
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0, 0, 8, 8, { { ' ' }, 0, 1, 1 }
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};
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static const struct grid_cell_entry grid_default_entry = {
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0, { .data = { 0, 8, 8, ' ' } }
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/* Cleared grid cell data. */
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const struct grid_cell grid_cleared_cell = {
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GRID_FLAG_CLEARED, 0, 8, 8, { { ' ' }, 0, 1, 1 }
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};
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static const struct grid_cell_entry grid_cleared_entry = {
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GRID_FLAG_CLEARED, { .data = { 0, 8, 8, ' ' } }
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};
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static void grid_empty_line(struct grid *, u_int, u_int);
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@ -50,7 +55,7 @@ static void
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grid_store_cell(struct grid_cell_entry *gce, const struct grid_cell *gc,
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u_char c)
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{
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gce->flags = gc->flags;
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gce->flags = (gc->flags & ~GRID_FLAG_CLEARED);
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gce->data.fg = gc->fg & 0xff;
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if (gc->fg & COLOUR_FLAG_256)
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@ -64,7 +69,7 @@ grid_store_cell(struct grid_cell_entry *gce, const struct grid_cell *gc,
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gce->data.data = c;
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}
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/* Check if a cell should be extended. */
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/* Check if a cell should be an extended cell. */
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static int
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grid_need_extended_cell(const struct grid_cell_entry *gce,
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const struct grid_cell *gc)
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@ -80,6 +85,40 @@ grid_need_extended_cell(const struct grid_cell_entry *gce,
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return (0);
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}
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/* Get an extended cell. */
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static void
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grid_get_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
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int flags)
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{
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u_int at = gl->extdsize + 1;
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gl->extddata = xreallocarray(gl->extddata, at, sizeof *gl->extddata);
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gl->extdsize = at;
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gce->offset = at - 1;
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gce->flags = (flags | GRID_FLAG_EXTENDED);
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}
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/* Set cell as extended. */
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static struct grid_cell *
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grid_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
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const struct grid_cell *gc)
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{
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struct grid_cell *gcp;
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int flags = (gc->flags & ~GRID_FLAG_CLEARED);
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if (~gce->flags & GRID_FLAG_EXTENDED)
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grid_get_extended_cell(gl, gce, flags);
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else if (gce->offset >= gl->extdsize)
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fatalx("offset too big");
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gl->flags |= GRID_LINE_EXTENDED;
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gcp = &gl->extddata[gce->offset];
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memcpy(gcp, gc, sizeof *gcp);
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gcp->flags = flags;
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return (gcp);
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}
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/* Free up unused extended cells. */
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static void
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grid_compact_line(struct grid_line *gl)
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@ -122,29 +161,6 @@ grid_compact_line(struct grid_line *gl)
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gl->extdsize = new_extdsize;
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}
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/* Set cell as extended. */
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static struct grid_cell *
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grid_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
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const struct grid_cell *gc)
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{
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struct grid_cell *gcp;
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gl->flags |= GRID_LINE_EXTENDED;
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if (~gce->flags & GRID_FLAG_EXTENDED) {
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gl->extddata = xreallocarray(gl->extddata, gl->extdsize + 1,
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sizeof *gl->extddata);
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gce->offset = gl->extdsize++;
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gce->flags = gc->flags | GRID_FLAG_EXTENDED;
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}
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if (gce->offset >= gl->extdsize)
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fatalx("offset too big");
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gcp = &gl->extddata[gce->offset];
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memcpy(gcp, gc, sizeof *gcp);
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return (gcp);
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}
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/* Get line data. */
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struct grid_line *
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grid_get_line(struct grid *gd, u_int line)
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@ -167,9 +183,13 @@ grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)
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struct grid_cell_entry *gce = &gl->celldata[px];
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struct grid_cell *gc;
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memcpy(gce, &grid_default_entry, sizeof *gce);
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memcpy(gce, &grid_cleared_entry, sizeof *gce);
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if (bg & COLOUR_FLAG_RGB) {
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gc = grid_extended_cell(gl, gce, &grid_default_cell);
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grid_get_extended_cell(gl, gce, gce->flags);
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gl->flags |= GRID_LINE_EXTENDED;
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gc = &gl->extddata[gce->offset];
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memcpy(gc, &grid_cleared_cell, sizeof *gc);
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gc->bg = bg;
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} else {
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if (bg & COLOUR_FLAG_256)
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1
tmux.h
1
tmux.h
@ -579,6 +579,7 @@ enum utf8_state {
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#define GRID_FLAG_EXTENDED 0x8
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#define GRID_FLAG_SELECTED 0x10
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#define GRID_FLAG_NOPALETTE 0x20
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#define GRID_FLAG_CLEARED 0x40
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/* Grid line flags. */
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#define GRID_LINE_WRAPPED 0x1
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40
tty.c
40
tty.c
@ -1208,7 +1208,7 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
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u_int i, j, ux, sx, width;
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int flags, cleared = 0;
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char buf[512];
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size_t len, old_len;
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size_t len;
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u_int cellsize;
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log_debug("%s: px=%u py=%u nx=%u atx=%u aty=%u", __func__,
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@ -1263,8 +1263,6 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
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tty_putcode(tty, TTYC_EL1);
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cleared = 1;
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}
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if (px + sx != 0)
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tty_cursor(tty, atx, aty);
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} else
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log_debug("%s: wrapped line %u", __func__, aty);
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@ -1281,10 +1279,17 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
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gcp->attr != last.attr ||
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gcp->fg != last.fg ||
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gcp->bg != last.bg ||
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ux + width + gcp->data.width >= nx ||
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ux + width + gcp->data.width > nx ||
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(sizeof buf) - len < gcp->data.size)) {
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tty_attributes(tty, &last, wp);
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tty_putn(tty, buf, len, width);
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if (last.flags & GRID_FLAG_CLEARED) {
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log_debug("%s: %zu cleared", __func__, len);
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tty_clear_line(tty, wp, aty, atx + ux, width,
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last.bg);
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} else {
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tty_attributes(tty, &last, wp);
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tty_cursor(tty, atx + ux, aty);
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tty_putn(tty, buf, len, width);
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}
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ux += width;
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len = 0;
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@ -1297,6 +1302,7 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
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memcpy(&last, gcp, sizeof last);
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if (ux + gcp->data.width > nx) {
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tty_attributes(tty, &last, wp);
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tty_cursor(tty, atx + ux, aty);
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for (j = 0; j < gcp->data.width; j++) {
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if (ux + j > nx)
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break;
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@ -1305,6 +1311,7 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
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}
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} else if (gcp->attr & GRID_ATTR_CHARSET) {
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tty_attributes(tty, &last, wp);
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tty_cursor(tty, atx + ux, aty);
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for (j = 0; j < gcp->data.size; j++)
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tty_putc(tty, gcp->data.data[j]);
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ux += gc.data.width;
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@ -1314,24 +1321,21 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
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width += gcp->data.width;
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}
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}
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if (len != 0) {
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if (grid_cells_equal(&last, &grid_default_cell)) {
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old_len = len;
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while (len > 0 && buf[len - 1] == ' ') {
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len--;
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width--;
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}
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log_debug("%s: trimmed %zu spaces", __func__,
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old_len - len);
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}
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if (len != 0) {
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if (len != 0 && ((~last.flags & GRID_FLAG_CLEARED) || last.bg != 8)) {
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if (last.flags & GRID_FLAG_CLEARED) {
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log_debug("%s: %zu cleared (end)", __func__, len);
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tty_clear_line(tty, wp, aty, atx + ux, width, last.bg);
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} else {
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tty_attributes(tty, &last, wp);
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tty_cursor(tty, atx + ux, aty);
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tty_putn(tty, buf, len, width);
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ux += width;
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}
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ux += width;
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}
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if (!cleared && ux < nx) {
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log_debug("%s: %u to end of line (%zu cleared)", __func__,
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nx - ux, len);
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tty_default_attributes(tty, wp, 8);
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tty_clear_line(tty, wp, aty, atx + ux, nx - ux, 8);
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}
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