mirror of
https://github.com/tmux/tmux.git
synced 2024-12-12 17:38:48 +00:00
Use relative cursor movement instead of absolute when possible and when
supported by the terminal to reduce the size of the output data (generally about 10-20%).
This commit is contained in:
Nicholas Marriott
parent
33ae063cae
commit
687c4a9fab
11
tmux.h
11
tmux.h
@ -195,9 +195,15 @@ enum tty_code_code {
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TTYC_CNORM, /* cursor_normal, ve */
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TTYC_COLORS, /* max_colors, Co */
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TTYC_CSR, /* change_scroll_region, cs */
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TTYC_CUB, /* parm_left_cursor, LE */
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TTYC_CUB1, /* cursor_left, le */
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TTYC_CUD, /* parm_down_cursor, DO */
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TTYC_CUD1, /* cursor_down, do */
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TTYC_CUF, /* parm_right_cursor, RI */
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TTYC_CUF1, /* cursor_right, nd */
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TTYC_CUP, /* cursor_address, cm */
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TTYC_CUU, /* parm_up_cursor, UP */
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TTYC_CUU1, /* cursor_up, up */
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TTYC_DCH, /* parm_dch, DC */
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TTYC_DCH1, /* delete_character, dc */
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TTYC_DIM, /* enter_dim_mode, mh */
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@ -206,6 +212,8 @@ enum tty_code_code {
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TTYC_EL, /* clr_eol, ce */
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TTYC_EL1, /* clr_bol, cb */
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TTYC_ENACS, /* ena_acs, eA */
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TTYC_HOME, /* cursor_home, ho */
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TTYC_HPA, /* column_address, ch */
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TTYC_ICH, /* parm_ich, IC */
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TTYC_ICH1, /* insert_character, ic */
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TTYC_IL, /* parm_insert_line, IL */
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@ -232,8 +240,8 @@ enum tty_code_code {
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TTYC_KF17, /* key_f17, F7 */
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TTYC_KF18, /* key_f18, F8 */
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TTYC_KF19, /* key_f19, F9 */
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TTYC_KF20, /* key_f20, F10 */
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TTYC_KF2, /* key_f2, k2 */
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TTYC_KF20, /* key_f20, F10 */
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TTYC_KF3, /* key_f3, k3 */
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TTYC_KF4, /* key_f4, k4 */
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TTYC_KF5, /* key_f5, k5 */
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@ -262,6 +270,7 @@ enum tty_code_code {
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TTYC_SMKX, /* keypad_xmit, ks */
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TTYC_SMSO, /* enter_standout_mode, so */
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TTYC_SMUL, /* enter_underline_mode, us */
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TTYC_VPA, /* row_address, cv */
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TTYC_XENL, /* eat_newline_glitch, xn */
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};
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#define NTTYCODE (TTYC_XENL + 1)
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11
tty-term.c
11
tty-term.c
@ -43,9 +43,15 @@ struct tty_term_code_entry tty_term_codes[NTTYCODE] = {
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{ TTYC_CNORM, TTYCODE_STRING, "cnorm" },
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{ TTYC_COLORS, TTYCODE_NUMBER, "colors" },
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{ TTYC_CSR, TTYCODE_STRING, "csr" },
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{ TTYC_CUB, TTYCODE_STRING, "cub" },
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{ TTYC_CUB1, TTYCODE_STRING, "cub1" },
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{ TTYC_CUD, TTYCODE_STRING, "cud" },
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{ TTYC_CUD1, TTYCODE_STRING, "cud1" },
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{ TTYC_CUF, TTYCODE_STRING, "cuf" },
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{ TTYC_CUF1, TTYCODE_STRING, "cuf1" },
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{ TTYC_CUP, TTYCODE_STRING, "cup" },
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{ TTYC_CUU, TTYCODE_STRING, "cuu" },
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{ TTYC_CUU1, TTYCODE_STRING, "cuu1" },
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{ TTYC_DCH, TTYCODE_STRING, "dch" },
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{ TTYC_DCH1, TTYCODE_STRING, "dch1" },
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{ TTYC_DIM, TTYCODE_STRING, "dim" },
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@ -54,6 +60,8 @@ struct tty_term_code_entry tty_term_codes[NTTYCODE] = {
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{ TTYC_EL, TTYCODE_STRING, "el" },
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{ TTYC_EL1, TTYCODE_STRING, "el1" },
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{ TTYC_ENACS, TTYCODE_STRING, "enacs" },
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{ TTYC_HOME, TTYCODE_STRING, "home" },
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{ TTYC_HPA, TTYCODE_STRING, "hpa" },
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{ TTYC_ICH, TTYCODE_STRING, "ich" },
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{ TTYC_ICH1, TTYCODE_STRING, "ich1" },
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{ TTYC_IL, TTYCODE_STRING, "il" },
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@ -80,8 +88,8 @@ struct tty_term_code_entry tty_term_codes[NTTYCODE] = {
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{ TTYC_KF17, TTYCODE_STRING, "kf17" },
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{ TTYC_KF18, TTYCODE_STRING, "kf18" },
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{ TTYC_KF19, TTYCODE_STRING, "kf19" },
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{ TTYC_KF20, TTYCODE_STRING, "kf20" },
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{ TTYC_KF2, TTYCODE_STRING, "kf2" },
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{ TTYC_KF20, TTYCODE_STRING, "kf20" },
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{ TTYC_KF3, TTYCODE_STRING, "kf3" },
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{ TTYC_KF4, TTYCODE_STRING, "kf4" },
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{ TTYC_KF5, TTYCODE_STRING, "kf5" },
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@ -110,6 +118,7 @@ struct tty_term_code_entry tty_term_codes[NTTYCODE] = {
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{ TTYC_SMKX, TTYCODE_STRING, "smkx" },
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{ TTYC_SMSO, TTYCODE_STRING, "smso" },
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{ TTYC_SMUL, TTYCODE_STRING, "smul" },
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{ TTYC_VPA, TTYCODE_STRING, "vpa" },
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{ TTYC_XENL, TTYCODE_FLAG, "xenl" },
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};
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123
tty.c
123
tty.c
@ -21,6 +21,7 @@
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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@ -916,13 +917,14 @@ tty_region(struct tty *tty, u_int rupper, u_int rlower)
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tty->rupper = rupper;
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tty->rlower = rlower;
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tty->cx = 0;
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tty->cy = 0;
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tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
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}
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/* Move cursor inside pane. */
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void
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tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy)
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{
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@ -931,17 +933,122 @@ tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy)
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tty_cursor(tty, wp->xoff + cx, wp->yoff + cy);
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}
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/* Move cursor to absolute position. */
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void
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tty_cursor(struct tty *tty, u_int cx, u_int cy)
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{
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if (cx == 0 && tty->cx != 0 && tty->cy == cy) {
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tty->cx = 0;
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tty_putc(tty, '\r');
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} else if (tty->cx != cx || tty->cy != cy) {
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tty->cx = cx;
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tty->cy = cy;
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tty_putcode2(tty, TTYC_CUP, tty->cy, tty->cx);
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struct tty_term *term = tty->term;
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u_int thisx, thisy;
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int change;
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if (cx > tty->sx - 1)
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cx = tty->sx - 1;
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thisx = tty->cx;
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if (thisx > tty->sx - 1)
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thisx = tty->sx - 1;
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thisy = tty->cy;
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/* No change. */
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if (cx == thisx && cy == thisy)
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return;
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/* Move to home position (0, 0). */
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if (cx == 0 && cy == 0 && tty_term_has(term, TTYC_HOME)) {
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tty_putcode(tty, TTYC_HOME);
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goto out;
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}
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/* Zero on the next line. */
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if (cx == 0 && cy == thisy + 1) {
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tty_putc(tty, '\r');
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tty_putc(tty, '\n');
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goto out;
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}
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/* Row staying the same. */
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if (cy == thisy) {
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/* To left edge. */
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if (cx == 0) {
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tty_putc(tty, '\r');
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goto out;
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}
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/* One to the left. */
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if (cx == thisx - 1 && tty_term_has(term, TTYC_CUB1)) {
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tty_putcode(tty, TTYC_CUB1);
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goto out;
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}
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/* One to the right. */
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if (cx == thisx + 1 && tty_term_has(term, TTYC_CUF1)) {
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tty_putcode(tty, TTYC_CUF1);
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goto out;
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}
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/* Calculate difference. */
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change = thisx - cx; /* +ve left, -ve right */
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/*
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* Use HPA if change is larger than absolute, otherwise move
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* the cursor with CUB/CUF.
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*/
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if (abs(change) > cx && tty_term_has(term, TTYC_HPA)) {
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tty_putcode1(tty, TTYC_HPA, cx);
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goto out;
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} else if (change > 0 && tty_term_has(term, TTYC_CUB)) {
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tty_putcode1(tty, TTYC_CUB, change);
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goto out;
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} else if (change < 0 && tty_term_has(term, TTYC_CUF)) {
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tty_putcode1(tty, TTYC_CUF, -change);
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goto out;
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}
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}
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/* Column staying the same. */
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if (cx == thisx ) {
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/* One above. */
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if (cy != tty->rupper &&
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cy == thisy - 1 && tty_term_has(term, TTYC_CUU1)) {
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tty_putcode(tty, TTYC_CUU1);
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goto out;
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}
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/* One below. */
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if (cy != tty->rlower &&
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cy == thisy + 1 && tty_term_has(term, TTYC_CUD1)) {
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tty_putcode(tty, TTYC_CUD1);
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goto out;
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}
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/* Calculate difference. */
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change = thisy - cy; /* +ve up, -ve down */
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/*
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* Use VPA if change is larger than absolute or if this change
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* would cross the scroll region, otherwise use CUU/CUD.
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*/
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if ((abs(change) > cy ||
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(change < 0 && cy - change > tty->rlower) ||
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(change > 0 && cy - change < tty->rupper)) &&
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tty_term_has(term, TTYC_VPA)) {
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tty_putcode1(tty, TTYC_VPA, cy);
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goto out;
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} else if (change > 0 && tty_term_has(term, TTYC_CUU)) {
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tty_putcode1(tty, TTYC_CUU, change);
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goto out;
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} else if (change < 0 && tty_term_has(term, TTYC_CUD)) {
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tty_putcode1(tty, TTYC_CUD, -change);
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goto out;
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}
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}
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/* Absolute movement. */
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tty_putcode2(tty, TTYC_CUP, cy, cx);
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out:
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tty->cx = cx;
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tty->cy = cy;
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}
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void
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