1996-11-01 06:45:43 +00:00
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/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include "../common/common.h"
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#include "vi.h"
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#ifdef VISIBLE_TAB_CHARS
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#define TABCH '-'
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#else
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#define TABCH ' '
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#endif
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/*
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* vs_line --
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* Update one line on the screen.
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*
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2015-04-10 13:26:05 +00:00
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* PUBLIC: int vs_line(SCR *, SMAP *, size_t *, size_t *);
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1996-11-01 06:45:43 +00:00
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*/
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int
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2013-08-11 09:44:58 +00:00
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vs_line(SCR *sp, SMAP *smp, size_t *yp, size_t *xp)
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1996-11-01 06:45:43 +00:00
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{
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2013-08-11 09:44:58 +00:00
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u_char *kp;
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1996-11-01 06:45:43 +00:00
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GS *gp;
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SMAP *tsmp;
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2013-08-11 09:44:58 +00:00
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size_t chlen = 0, cno_cnt, cols_per_screen, len, nlen;
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1996-11-01 06:45:43 +00:00
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size_t offset_in_char, offset_in_line, oldx, oldy;
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size_t scno, skip_cols, skip_screens;
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2013-08-11 09:44:58 +00:00
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int dne, is_cached, is_partial, is_tab, no_draw;
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1996-11-01 06:45:43 +00:00
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int list_tab, list_dollar;
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2013-08-11 09:44:58 +00:00
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CHAR_T *p;
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CHAR_T *cbp, *ecbp, cbuf[128];
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ARG_CHAR_T ch = '\0';
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1996-11-01 06:45:43 +00:00
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#if defined(DEBUG) && 0
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TRACE(sp, "vs_line: row %u: line: %u off: %u\n",
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smp - HMAP, smp->lno, smp->off);
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#endif
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/*
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* If ex modifies the screen after ex output is already on the screen,
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* don't touch it -- we'll get scrolling wrong, at best.
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*/
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2002-01-31 14:20:50 +00:00
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no_draw = 0;
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1996-11-01 06:45:43 +00:00
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if (!F_ISSET(sp, SC_TINPUT_INFO) && VIP(sp)->totalcount > 1)
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2002-01-31 14:20:50 +00:00
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no_draw = 1;
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1996-11-01 06:45:43 +00:00
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if (F_ISSET(sp, SC_SCR_EXWROTE) && smp - HMAP != LASTLINE(sp))
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2002-01-31 14:20:50 +00:00
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no_draw = 1;
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1996-11-01 06:45:43 +00:00
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/*
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* Assume that, if the cache entry for the line is filled in, the
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* line is already on the screen, and all we need to do is return
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* the cursor position. If the calling routine doesn't need the
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* cursor position, we can just return.
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*/
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is_cached = SMAP_CACHE(smp);
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2002-01-31 14:20:50 +00:00
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if (yp == NULL && (is_cached || no_draw))
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1996-11-01 06:45:43 +00:00
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return (0);
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/*
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* A nasty side effect of this routine is that it returns the screen
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* position for the "current" character. Not pretty, but this is the
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* only routine that really knows what's out there.
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*
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* Move to the line. This routine can be called by vs_sm_position(),
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* which uses it to fill in the cache entry so it can figure out what
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* the real contents of the screen are. Because of this, we have to
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* return to whereever we started from.
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*/
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gp = sp->gp;
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(void)gp->scr_cursor(sp, &oldy, &oldx);
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(void)gp->scr_move(sp, smp - HMAP, 0);
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/* Get the line. */
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dne = db_get(sp, smp->lno, 0, &p, &len);
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/*
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* Special case if we're printing the info/mode line. Skip printing
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* the leading number, as well as other minor setup. The only time
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* this code paints the mode line is when the user is entering text
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* for a ":" command, so we can put the code here instead of dealing
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* with the empty line logic below. This is a kludge, but it's pretty
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* much confined to this module.
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*
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* Set the number of columns for this screen.
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* Set the number of chars or screens to skip until a character is to
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* be displayed.
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*/
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cols_per_screen = sp->cols;
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if (O_ISSET(sp, O_LEFTRIGHT)) {
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skip_screens = 0;
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skip_cols = smp->coff;
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} else {
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skip_screens = smp->soff - 1;
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skip_cols = skip_screens * cols_per_screen;
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}
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list_tab = O_ISSET(sp, O_LIST);
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if (F_ISSET(sp, SC_TINPUT_INFO))
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list_dollar = 0;
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else {
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list_dollar = list_tab;
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/*
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* If O_NUMBER is set, the line doesn't exist and it's line
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* number 1, i.e., an empty file, display the line number.
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*
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* If O_NUMBER is set, the line exists and the first character
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* on the screen is the first character in the line, display
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* the line number.
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*
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* !!!
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* If O_NUMBER set, decrement the number of columns in the
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* first screen. DO NOT CHANGE THIS -- IT'S RIGHT! The
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* rest of the code expects this to reflect the number of
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* columns in the first screen, regardless of the number of
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* columns we're going to skip.
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*/
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if (O_ISSET(sp, O_NUMBER)) {
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cols_per_screen -= O_NUMBER_LENGTH;
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if ((!dne || smp->lno == 1) && skip_cols == 0) {
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2013-08-11 09:44:58 +00:00
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nlen = snprintf((char*)cbuf,
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sizeof(cbuf), O_NUMBER_FMT, (u_long)smp->lno);
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(void)gp->scr_addstr(sp, (char*)cbuf, nlen);
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1996-11-01 06:45:43 +00:00
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}
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}
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}
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/*
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* Special case non-existent lines and the first line of an empty
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* file. In both cases, the cursor position is 0, but corrected
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* as necessary for the O_NUMBER field, if it was displayed.
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*/
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if (dne || len == 0) {
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/* Fill in the cursor. */
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if (yp != NULL && smp->lno == sp->lno) {
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*yp = smp - HMAP;
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*xp = sp->cols - cols_per_screen;
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}
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/* If the line is on the screen, quit. */
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2002-01-31 14:20:50 +00:00
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if (is_cached || no_draw)
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1996-11-01 06:45:43 +00:00
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goto ret1;
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/* Set line cache information. */
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smp->c_sboff = smp->c_eboff = 0;
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smp->c_scoff = smp->c_eclen = 0;
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/*
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* Lots of special cases for empty lines, but they only apply
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* if we're displaying the first screen of the line.
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*/
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2020-10-01 04:25:54 +00:00
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if (skip_cols == 0) {
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1996-11-01 06:45:43 +00:00
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if (dne) {
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if (smp->lno == 1) {
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if (list_dollar) {
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ch = '$';
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goto empty;
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}
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} else {
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ch = '~';
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goto empty;
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}
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2020-10-01 04:25:54 +00:00
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} else {
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1996-11-01 06:45:43 +00:00
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if (list_dollar) {
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ch = '$';
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empty: (void)gp->scr_addstr(sp,
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KEY_NAME(sp, ch), KEY_LEN(sp, ch));
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}
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2020-10-01 04:25:54 +00:00
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}
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}
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1996-11-01 06:45:43 +00:00
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(void)gp->scr_clrtoeol(sp);
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(void)gp->scr_move(sp, oldy, oldx);
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return (0);
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}
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2013-08-11 09:44:58 +00:00
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/* If we shortened this line in another screen, the cursor
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* position may have fallen off.
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*/
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if (sp->lno == smp->lno && sp->cno >= len)
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sp->cno = len - 1;
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1996-11-01 06:45:43 +00:00
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/*
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* If we just wrote this or a previous line, we cached the starting
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* and ending positions of that line. The way it works is we keep
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* information about the lines displayed in the SMAP. If we're
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* painting the screen in the forward direction, this saves us from
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* reformatting the physical line for every line on the screen. This
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* wins big on binary files with 10K lines.
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*
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* Test for the first screen of the line, then the current screen line,
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* then the line behind us, then do the hard work. Note, it doesn't
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* do us any good to have a line in front of us -- it would be really
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* hard to try and figure out tabs in the reverse direction, i.e. how
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* many spaces a tab takes up in the reverse direction depends on
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* what characters preceded it.
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*
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* Test for the first screen of the line.
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*/
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if (skip_cols == 0) {
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smp->c_sboff = offset_in_line = 0;
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smp->c_scoff = offset_in_char = 0;
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p = &p[offset_in_line];
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goto display;
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}
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/* Test to see if we've seen this exact line before. */
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if (is_cached) {
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offset_in_line = smp->c_sboff;
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offset_in_char = smp->c_scoff;
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p = &p[offset_in_line];
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/* Set cols_per_screen to 2nd and later line length. */
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if (O_ISSET(sp, O_LEFTRIGHT) || skip_cols > cols_per_screen)
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cols_per_screen = sp->cols;
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goto display;
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}
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/* Test to see if we saw an earlier part of this line before. */
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if (smp != HMAP &&
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SMAP_CACHE(tsmp = smp - 1) && tsmp->lno == smp->lno) {
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if (tsmp->c_eclen != tsmp->c_ecsize) {
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offset_in_line = tsmp->c_eboff;
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offset_in_char = tsmp->c_eclen;
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} else {
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offset_in_line = tsmp->c_eboff + 1;
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offset_in_char = 0;
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}
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/* Put starting info for this line in the cache. */
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smp->c_sboff = offset_in_line;
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smp->c_scoff = offset_in_char;
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p = &p[offset_in_line];
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/* Set cols_per_screen to 2nd and later line length. */
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if (O_ISSET(sp, O_LEFTRIGHT) || skip_cols > cols_per_screen)
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cols_per_screen = sp->cols;
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goto display;
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}
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scno = 0;
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offset_in_line = 0;
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offset_in_char = 0;
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/* Do it the hard way, for leftright scrolling screens. */
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if (O_ISSET(sp, O_LEFTRIGHT)) {
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for (; offset_in_line < len; ++offset_in_line) {
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2013-08-11 09:44:58 +00:00
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chlen = (ch = *p++) == '\t' && !list_tab ?
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TAB_OFF(scno) : KEY_COL(sp, ch);
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1996-11-01 06:45:43 +00:00
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if ((scno += chlen) >= skip_cols)
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break;
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}
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/* Set cols_per_screen to 2nd and later line length. */
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cols_per_screen = sp->cols;
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/* Put starting info for this line in the cache. */
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2002-01-31 13:28:37 +00:00
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if (offset_in_line >= len) {
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smp->c_sboff = offset_in_line;
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smp->c_scoff = 255;
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} else if (scno != skip_cols) {
|
1996-11-01 06:45:43 +00:00
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smp->c_sboff = offset_in_line;
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smp->c_scoff =
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offset_in_char = chlen - (scno - skip_cols);
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--p;
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} else {
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smp->c_sboff = ++offset_in_line;
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smp->c_scoff = 0;
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}
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}
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/* Do it the hard way, for historic line-folding screens. */
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else {
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for (; offset_in_line < len; ++offset_in_line) {
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2013-08-11 09:44:58 +00:00
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chlen = (ch = *p++) == '\t' && !list_tab ?
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TAB_OFF(scno) : KEY_COL(sp, ch);
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1996-11-01 06:45:43 +00:00
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if ((scno += chlen) < cols_per_screen)
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continue;
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scno -= cols_per_screen;
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/* Set cols_per_screen to 2nd and later line length. */
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cols_per_screen = sp->cols;
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/*
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* If crossed the last skipped screen boundary, start
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* displaying the characters.
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*/
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if (--skip_screens == 0)
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break;
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}
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/* Put starting info for this line in the cache. */
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if (scno != 0) {
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smp->c_sboff = offset_in_line;
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smp->c_scoff = offset_in_char = chlen - scno;
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--p;
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} else {
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smp->c_sboff = ++offset_in_line;
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smp->c_scoff = 0;
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}
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}
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display:
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/*
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* Set the number of characters to skip before reaching the cursor
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* character. Offset by 1 and use 0 as a flag value. Vs_line is
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* called repeatedly with a valid pointer to a cursor position.
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* Don't fill anything in unless it's the right line and the right
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* character, and the right part of the character...
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*/
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if (yp == NULL ||
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smp->lno != sp->lno || sp->cno < offset_in_line ||
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offset_in_line + cols_per_screen < sp->cno) {
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cno_cnt = 0;
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|
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/* If the line is on the screen, quit. */
|
2002-01-31 14:20:50 +00:00
|
|
|
if (is_cached || no_draw)
|
1996-11-01 06:45:43 +00:00
|
|
|
goto ret1;
|
|
|
|
} else
|
|
|
|
cno_cnt = (sp->cno - offset_in_line) + 1;
|
|
|
|
|
|
|
|
/* This is the loop that actually displays characters. */
|
2013-08-11 09:44:58 +00:00
|
|
|
ecbp = (cbp = cbuf) + SIZE(cbuf) - 1;
|
1996-11-01 06:45:43 +00:00
|
|
|
for (is_partial = 0, scno = 0;
|
|
|
|
offset_in_line < len; ++offset_in_line, offset_in_char = 0) {
|
2013-08-11 09:44:58 +00:00
|
|
|
if ((ch = *p++) == '\t' && !list_tab) {
|
1996-11-01 06:45:43 +00:00
|
|
|
scno += chlen = TAB_OFF(scno) - offset_in_char;
|
|
|
|
is_tab = 1;
|
|
|
|
} else {
|
2013-08-11 09:44:58 +00:00
|
|
|
scno += chlen = KEY_COL(sp, ch) - offset_in_char;
|
1996-11-01 06:45:43 +00:00
|
|
|
is_tab = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Only display up to the right-hand column. Set a flag if
|
|
|
|
* the entire character wasn't displayed for use in setting
|
|
|
|
* the cursor. If reached the end of the line, set the cache
|
|
|
|
* info for the screen. Don't worry about there not being
|
|
|
|
* characters to display on the next screen, its lno/off won't
|
|
|
|
* match up in that case.
|
|
|
|
*/
|
|
|
|
if (scno >= cols_per_screen) {
|
|
|
|
if (is_tab == 1) {
|
|
|
|
chlen -= scno - cols_per_screen;
|
|
|
|
smp->c_ecsize = smp->c_eclen = chlen;
|
|
|
|
scno = cols_per_screen;
|
|
|
|
} else {
|
|
|
|
smp->c_ecsize = chlen;
|
|
|
|
chlen -= scno - cols_per_screen;
|
|
|
|
smp->c_eclen = chlen;
|
|
|
|
|
|
|
|
if (scno > cols_per_screen)
|
|
|
|
is_partial = 1;
|
|
|
|
}
|
|
|
|
smp->c_eboff = offset_in_line;
|
|
|
|
|
|
|
|
/* Terminate the loop. */
|
|
|
|
offset_in_line = len;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the caller wants the cursor value, and this was the
|
|
|
|
* cursor character, set the value. There are two ways to
|
|
|
|
* put the cursor on a character -- if it's normal display
|
|
|
|
* mode, it goes on the last column of the character. If
|
|
|
|
* it's input mode, it goes on the first. In normal mode,
|
|
|
|
* set the cursor only if the entire character was displayed.
|
|
|
|
*/
|
|
|
|
if (cno_cnt &&
|
|
|
|
--cno_cnt == 0 && (F_ISSET(sp, SC_TINPUT) || !is_partial)) {
|
|
|
|
*yp = smp - HMAP;
|
|
|
|
if (F_ISSET(sp, SC_TINPUT))
|
2013-08-11 09:44:58 +00:00
|
|
|
if (is_partial)
|
|
|
|
*xp = scno - smp->c_ecsize;
|
|
|
|
else
|
|
|
|
*xp = scno - chlen;
|
1996-11-01 06:45:43 +00:00
|
|
|
else
|
|
|
|
*xp = scno - 1;
|
|
|
|
if (O_ISSET(sp, O_NUMBER) &&
|
|
|
|
!F_ISSET(sp, SC_TINPUT_INFO) && skip_cols == 0)
|
|
|
|
*xp += O_NUMBER_LENGTH;
|
|
|
|
|
|
|
|
/* If the line is on the screen, quit. */
|
2002-01-31 14:20:50 +00:00
|
|
|
if (is_cached || no_draw)
|
1996-11-01 06:45:43 +00:00
|
|
|
goto ret1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If the line is on the screen, don't display anything. */
|
2002-01-31 14:20:50 +00:00
|
|
|
if (is_cached || no_draw)
|
1996-11-01 06:45:43 +00:00
|
|
|
continue;
|
|
|
|
|
2020-10-01 04:25:54 +00:00
|
|
|
#define FLUSH do { \
|
1996-11-01 06:45:43 +00:00
|
|
|
*cbp = '\0'; \
|
2013-08-11 09:44:58 +00:00
|
|
|
(void)gp->scr_waddstr(sp, cbuf, cbp - cbuf); \
|
1996-11-01 06:45:43 +00:00
|
|
|
cbp = cbuf; \
|
2020-10-01 04:25:54 +00:00
|
|
|
} while (0)
|
1996-11-01 06:45:43 +00:00
|
|
|
/*
|
|
|
|
* Display the character. We do tab expansion here because
|
|
|
|
* the screen interface doesn't have any way to set the tab
|
|
|
|
* length. Note, it's theoretically possible for chlen to
|
|
|
|
* be larger than cbuf, if the user set a impossibly large
|
|
|
|
* tabstop.
|
|
|
|
*/
|
|
|
|
if (is_tab)
|
|
|
|
while (chlen--) {
|
|
|
|
if (cbp >= ecbp)
|
|
|
|
FLUSH;
|
|
|
|
*cbp++ = TABCH;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
if (cbp + chlen >= ecbp)
|
|
|
|
FLUSH;
|
2013-08-11 09:44:58 +00:00
|
|
|
|
|
|
|
/* don't display half a wide character */
|
|
|
|
if (is_partial && CHAR_WIDTH(sp, ch) > 1) {
|
|
|
|
*cbp++ = ' ';
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (KEY_NEEDSWIDE(sp, ch))
|
|
|
|
*cbp++ = ch;
|
|
|
|
else
|
|
|
|
for (kp = (u_char *)
|
|
|
|
KEY_NAME(sp, ch) + offset_in_char;
|
|
|
|
chlen--;)
|
|
|
|
*cbp++ = *kp++;
|
1996-11-01 06:45:43 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (scno < cols_per_screen) {
|
|
|
|
/* If didn't paint the whole line, update the cache. */
|
2013-08-11 09:44:58 +00:00
|
|
|
smp->c_ecsize = smp->c_eclen = KEY_COL(sp, ch);
|
1996-11-01 06:45:43 +00:00
|
|
|
smp->c_eboff = len - 1;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If not the info/mode line, and O_LIST set, and at the
|
|
|
|
* end of the line, and the line ended on this screen,
|
|
|
|
* add a trailing $.
|
|
|
|
*/
|
|
|
|
if (list_dollar) {
|
|
|
|
++scno;
|
|
|
|
|
|
|
|
chlen = KEY_LEN(sp, '$');
|
|
|
|
if (cbp + chlen >= ecbp)
|
|
|
|
FLUSH;
|
2013-08-11 09:44:58 +00:00
|
|
|
for (kp = (u_char *)
|
|
|
|
KEY_NAME(sp, '$'); chlen--;)
|
1996-11-01 06:45:43 +00:00
|
|
|
*cbp++ = *kp++;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If still didn't paint the whole line, clear the rest. */
|
|
|
|
if (scno < cols_per_screen)
|
|
|
|
(void)gp->scr_clrtoeol(sp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Flush any buffered characters. */
|
|
|
|
if (cbp > cbuf)
|
|
|
|
FLUSH;
|
|
|
|
|
|
|
|
ret1: (void)gp->scr_move(sp, oldy, oldx);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* vs_number --
|
|
|
|
* Repaint the numbers on all the lines.
|
|
|
|
*
|
2015-04-10 13:26:05 +00:00
|
|
|
* PUBLIC: int vs_number(SCR *);
|
1996-11-01 06:45:43 +00:00
|
|
|
*/
|
|
|
|
int
|
2013-08-11 09:44:58 +00:00
|
|
|
vs_number(SCR *sp)
|
1996-11-01 06:45:43 +00:00
|
|
|
{
|
|
|
|
GS *gp;
|
|
|
|
SMAP *smp;
|
|
|
|
VI_PRIVATE *vip;
|
|
|
|
size_t len, oldy, oldx;
|
|
|
|
int exist;
|
|
|
|
char nbuf[10];
|
|
|
|
|
|
|
|
gp = sp->gp;
|
|
|
|
vip = VIP(sp);
|
|
|
|
|
|
|
|
/* No reason to do anything if we're in input mode on the info line. */
|
|
|
|
if (F_ISSET(sp, SC_TINPUT_INFO))
|
|
|
|
return (0);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Try and avoid getting the last line in the file, by getting the
|
|
|
|
* line after the last line in the screen -- if it exists, we know
|
|
|
|
* we have to to number all the lines in the screen. Get the one
|
|
|
|
* after the last instead of the last, so that the info line doesn't
|
|
|
|
* fool us. (The problem is that file_lline will lie, and tell us
|
|
|
|
* that the info line is the last line in the file.) If that test
|
|
|
|
* fails, we have to check each line for existence.
|
|
|
|
*/
|
|
|
|
exist = db_exist(sp, TMAP->lno + 1);
|
|
|
|
|
|
|
|
(void)gp->scr_cursor(sp, &oldy, &oldx);
|
|
|
|
for (smp = HMAP; smp <= TMAP; ++smp) {
|
|
|
|
/* Numbers are only displayed for the first screen line. */
|
|
|
|
if (O_ISSET(sp, O_LEFTRIGHT)) {
|
|
|
|
if (smp->coff != 0)
|
|
|
|
continue;
|
|
|
|
} else
|
|
|
|
if (smp->soff != 1)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The first line of an empty file gets numbered, otherwise
|
|
|
|
* number any existing line.
|
|
|
|
*/
|
|
|
|
if (smp->lno != 1 && !exist && !db_exist(sp, smp->lno))
|
|
|
|
break;
|
|
|
|
|
|
|
|
(void)gp->scr_move(sp, smp - HMAP, 0);
|
2013-08-11 09:44:58 +00:00
|
|
|
len = snprintf(nbuf, sizeof(nbuf), O_NUMBER_FMT, (u_long)smp->lno);
|
1996-11-01 06:45:43 +00:00
|
|
|
(void)gp->scr_addstr(sp, nbuf, len);
|
|
|
|
}
|
|
|
|
(void)gp->scr_move(sp, oldy, oldx);
|
|
|
|
return (0);
|
|
|
|
}
|