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Diffstat (limited to 'src/term.c')
| -rw-r--r-- | src/term.c | 1240 |
1 files changed, 1240 insertions, 0 deletions
diff --git a/src/term.c b/src/term.c new file mode 100644 index 00000000000..c8a1ed0659a --- /dev/null +++ b/src/term.c @@ -0,0 +1,1240 @@ +/* terminal control module for terminals described by TERMCAP + Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc. + +This file is part of GNU Emacs. + +GNU Emacs is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 1, or (at your option) +any later version. + +GNU Emacs is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Emacs; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +#include <stdio.h> +#include <ctype.h> +#include "config.h" +#include "termhooks.h" +#include "termchar.h" +#include "termopts.h" +#include "cm.h" + +#define max(a, b) ((a) > (b) ? (a) : (b)) +#define min(a, b) ((a) < (b) ? (a) : (b)) + +#define OUTPUT(a) tputs (a, screen_height - curY, cmputc) +#define OUTPUT1(a) tputs (a, 1, cmputc) +#define OUTPUTL(a, lines) tputs (a, lines, cmputc) +#define OUTPUT_IF(a) { if (a) tputs (a, screen_height - curY, cmputc); } +#define OUTPUT1_IF(a) { if (a) tputs (a, 1, cmputc); } + +/* Terminal charateristics that higher levels want to look at. + These are all extern'd in termchar.h */ + +int screen_width; /* Number of usable columns */ +int screen_height; /* Number of lines */ +int must_write_spaces; /* Nonzero means spaces in the text + must actually be output; can't just skip + over some columns to leave them blank. */ +int min_padding_speed; /* Speed below which no padding necessary */ + +int line_ins_del_ok; /* Terminal can insert and delete lines */ +int char_ins_del_ok; /* Terminal can insert and delete chars */ +int scroll_region_ok; /* Terminal supports setting the scroll window */ +int memory_below_screen; /* Terminal remembers lines scrolled off bottom */ +int fast_clear_end_of_line; /* Terminal has a `ce' string */ + +int dont_calculate_costs; /* Nonzero means don't bother computing */ + /* various cost tables; we won't use them. */ + +/* Nonzero means no need to redraw the entire screen on resuming + a suspended Emacs. This is useful on terminals with multiple pages, + where one page is used for Emacs and another for all else. */ +int no_redraw_on_reenter; + +/* DCICcost[n] is cost of inserting N characters. + DCICcost[-n] is cost of deleting N characters. */ + +#define DCICcost (&DC_ICcost[screen_width]) +int *DC_ICcost; + +/* Hook functions that you can set to snap out the functions in this file. + These are all extern'd in termhooks.h */ + +int (*move_cursor_hook) (); +int (*raw_move_cursor_hook) (); + +int (*clear_to_end_hook) (); +int (*clear_screen_hook) (); +int (*clear_end_of_line_hook) (); + +int (*ins_del_lines_hook) (); + +int (*change_line_highlight_hook) (); +int (*reassert_line_highlight_hook) (); + +int (*insert_chars_hook) (); +int (*output_chars_hook) (); +int (*delete_chars_hook) (); + +int (*ring_bell_hook) (); + +int (*reset_terminal_modes_hook) (); +int (*set_terminal_modes_hook) (); +int (*update_begin_hook) (); +int (*update_end_hook) (); +int (*set_terminal_window_hook) (); + +int (*read_socket_hook) (); +int (*fix_screen_hook) (); +int (*calculate_costs_hook) (); + +/* Strings, numbers and flags taken from the termcap entry. */ + +char *TS_ins_line; /* termcap "al" */ +char *TS_ins_multi_lines; /* "AL" (one parameter, # lines to insert) */ +char *TS_bell; /* "bl" */ +char *TS_clr_to_bottom; /* "cd" */ +char *TS_clr_line; /* "ce", clear to end of line */ +char *TS_clr_screen; /* "cl" */ +char *TS_set_scroll_region; /* "cs" (2 params, first line and last line) */ +char *TS_set_scroll_region_1; /* "cS" (4 params: total lines, + lines above scroll region, lines below it, + total lines again) */ +char *TS_del_char; /* "dc" */ +char *TS_del_multi_chars; /* "DC" (one parameter, # chars to delete) */ +char *TS_del_line; /* "dl" */ +char *TS_del_multi_lines; /* "DL" (one parameter, # lines to delete) */ +char *TS_delete_mode; /* "dm", enter character-delete mode */ +char *TS_end_delete_mode; /* "ed", leave character-delete mode */ +char *TS_end_insert_mode; /* "ei", leave character-insert mode */ +char *TS_ins_char; /* "ic" */ +char *TS_ins_multi_chars; /* "IC" (one parameter, # chars to insert) */ +char *TS_insert_mode; /* "im", enter character-insert mode */ +char *TS_pad_inserted_char; /* "ip". Just padding, no commands. */ +char *TS_end_keypad_mode; /* "ke" */ +char *TS_keypad_mode; /* "ks" */ +char *TS_pad_char; /* "pc", char to use as padding */ +char *TS_repeat; /* "rp" (2 params, # times to repeat + and character to be repeated) */ +char *TS_end_standout_mode; /* "se" */ +char *TS_fwd_scroll; /* "sf" */ +char *TS_standout_mode; /* "so" */ +char *TS_rev_scroll; /* "sr" */ +char *TS_end_termcap_modes; /* "te" */ +char *TS_termcap_modes; /* "ti" */ +char *TS_visible_bell; /* "vb" */ +char *TS_end_visual_mode; /* "ve" */ +char *TS_visual_mode; /* "vi" */ +char *TS_set_window; /* "wi" (4 params, start and end of window, + each as vpos and hpos) */ + +int TF_hazeltine; /* termcap hz flag. */ +int TF_insmode_motion; /* termcap mi flag: can move while in insert mode. */ +int TF_standout_motion; /* termcap mi flag: can move while in standout mode. */ +int TF_underscore; /* termcap ul flag: _ underlines if overstruck on + nonblank position. Must clear before writing _. */ +int TF_teleray; /* termcap xt flag: many weird consequences. For t1061. */ + +int TF_xs; /* Nonzero for "xs". If set together with + TN_standout_width == 0, it means don't bother + to write any end-standout cookies. */ + +int TN_standout_width; /* termcap sg number: width occupied by standout markers */ + +static int RPov; /* # chars to start a TS_repeat */ + +static int delete_in_insert_mode; /* delete mode == insert mode */ + +static int se_is_so; /* 1 if same string both enters and leaves standout mode */ + +/* internal state */ + +/* Number of chars of space used for standout marker at beginning of line, + or'd with 0100. Zero if no standout marker at all. */ +/* used iff TN_standout_width >= 0. */ +char *chars_wasted; +static char *copybuf; + +/* nonzero means supposed to write text in standout mode. */ +int standout_requested; + +int insert_mode; /* Nonzero when in insert mode. */ +int standout_mode; /* Nonzero when in standout mode. */ + +/* Size of window specified by higher levels. + This is the number of lines, starting from top of screen, + to participate in ins/del line operations. + Effectively it excludes the bottom + screen_height - specified_window_size + lines from those operations. */ + +int specified_window; + +char *tparam (); + +ring_bell () +{ + if (ring_bell_hook) + { + (*ring_bell_hook) (); + return; + } + OUTPUT (TS_visible_bell && visible_bell ? TS_visible_bell : TS_bell); +} + +set_terminal_modes () +{ + if (set_terminal_modes_hook) + { + (*set_terminal_modes_hook) (); + return; + } + OUTPUT_IF (TS_termcap_modes); + OUTPUT_IF (TS_visual_mode); + OUTPUT_IF (TS_keypad_mode); + losecursor (); +} + +reset_terminal_modes () +{ + if (reset_terminal_modes_hook) + { + (*reset_terminal_modes_hook) (); + return; + } + if (TN_standout_width < 0) + turn_off_highlight (); + turn_off_insert (); + OUTPUT_IF (TS_end_keypad_mode); + OUTPUT_IF (TS_end_visual_mode); + OUTPUT_IF (TS_end_termcap_modes); +} + +update_begin () +{ + if (update_begin_hook) + (*update_begin_hook) (); +} + +update_end () +{ + if (update_end_hook) + { + (*update_end_hook) (); + return; + } + turn_off_insert (); + background_highlight (); + standout_requested = 0; +} + +set_terminal_window (size) + int size; +{ + if (set_terminal_window_hook) + { + (*set_terminal_window_hook) (size); + return; + } + specified_window = size ? size : screen_height; + if (!scroll_region_ok) + return; + set_scroll_region (0, specified_window); +} + +set_scroll_region (start, stop) + int start, stop; +{ + char *buf; + if (TS_set_scroll_region) + { + buf = tparam (TS_set_scroll_region, 0, 0, start, stop - 1); + } + else if (TS_set_scroll_region_1) + { + buf = tparam (TS_set_scroll_region_1, 0, 0, + screen_height, start, screen_height - stop, screen_height); + } + else + { + buf = tparam (TS_set_window, 0, 0, start, 0, stop, screen_width); + } + OUTPUT (buf); + free (buf); + losecursor (); +} + +turn_on_insert () +{ + if (!insert_mode) + OUTPUT (TS_insert_mode); + insert_mode = 1; +} + +turn_off_insert () +{ + if (insert_mode) + OUTPUT (TS_end_insert_mode); + insert_mode = 0; +} + +/* Handle highlighting when TN_standout_width (termcap sg) is not specified. + In these terminals, output is affected by the value of standout + mode when the output is written. + + These functions are called on all terminals, but do nothing + on terminals whose standout mode does not work that way. */ + +turn_off_highlight () +{ + if (TN_standout_width < 0) + { + if (standout_mode) + OUTPUT_IF (TS_end_standout_mode); + standout_mode = 0; + } +} + +turn_on_highlight () +{ + if (TN_standout_width < 0) + { + if (!standout_mode) + OUTPUT_IF (TS_standout_mode); + standout_mode = 1; + } +} + +/* Set standout mode to the state it should be in for + empty space inside windows. What this is, + depends on the user option inverse-video. */ + +background_highlight () +{ + if (TN_standout_width >= 0) + return; + if (inverse_video) + turn_on_highlight (); + else + turn_off_highlight (); +} + +/* Set standout mode to the mode specified for the text to be output. */ + +static +highlight_if_desired () +{ + if (TN_standout_width >= 0) + return; + if (!inverse_video == !standout_requested) + turn_off_highlight (); + else + turn_on_highlight (); +} + +/* Handle standout mode for terminals in which TN_standout_width >= 0. + On these terminals, standout is controlled by markers that + live inside the screen memory. TN_standout_width is the width + that the marker occupies in memory. Standout runs from the marker + to the end of the line on some terminals, or to the next + turn-off-standout marker (TS_end_standout_mode) string + on other terminals. */ + +/* Write a standout marker or end-standout marker at the front of the line + at vertical position vpos. */ + +write_standout_marker (flag, vpos) + int flag, vpos; +{ + if (flag || (TS_end_standout_mode && !TF_teleray && !se_is_so + && !(TF_xs && TN_standout_width == 0))) + { + cmgoto (vpos, 0); + cmplus (TN_standout_width); + OUTPUT (flag ? TS_standout_mode : TS_end_standout_mode); + chars_wasted[curY] = TN_standout_width | 0100; + } +} + +/* External interface to control of standout mode. + Call this when about to modify line at position VPOS + and not change whether it is highlighted. */ + +reassert_line_highlight (highlight, vpos) + int highlight; + int vpos; +{ + if (reassert_line_highlight_hook) + { + (*reassert_line_highlight_hook) (highlight, vpos); + return; + } + if (TN_standout_width < 0) + /* Handle terminals where standout takes affect at output time */ + standout_requested = highlight; + else if (chars_wasted[vpos] == 0) + /* For terminals with standout markers, write one on this line + if there isn't one already. */ + write_standout_marker (highlight, vpos); +} + +/* Call this when about to modify line at position VPOS + and change whether it is highlighted. */ + +change_line_highlight (new_highlight, vpos, first_unused_hpos) + int new_highlight, vpos, first_unused_hpos; +{ + standout_requested = new_highlight; + if (change_line_highlight_hook) + { + (*change_line_highlight_hook) (new_highlight, vpos, first_unused_hpos); + return; + } + + move_cursor (vpos, 0); + + if (TN_standout_width < 0) + background_highlight (); + /* If line starts with a marker, delete the marker */ + else if (TS_clr_line && chars_wasted[curY]) + { + turn_off_insert (); + /* On Teleray, make sure to erase the SO marker. */ + if (TF_teleray) + { + cmgoto (curY - 1, screen_width - 4); + OUTPUT ("\033S"); + curY++; /* ESC S moves to next line where the TS_standout_mode was */ + curX = 0; + } + else + cmgoto (curY, 0); /* reposition to kill standout marker */ + } + clear_end_of_line_raw (first_unused_hpos); + reassert_line_highlight (new_highlight, curY); +} + +/* Move to absolute position, specified origin 0 */ + +move_cursor (row, col) +{ + col += chars_wasted[row] & 077; + if (move_cursor_hook) + { + (*move_cursor_hook) (row, col); + return; + } + if (curY == row && curX == col) + return; + if (!TF_standout_motion) + background_highlight (); + if (!TF_insmode_motion) + turn_off_insert (); + cmgoto (row, col); +} + +/* Similar but don't take any account of the wasted characters. */ + +raw_move_cursor (row, col) +{ + if (raw_move_cursor_hook) + { + (*raw_move_cursor_hook) (row, col); + return; + } + if (curY == row && curX == col) + return; + if (!TF_standout_motion) + background_highlight (); + if (!TF_insmode_motion) + turn_off_insert (); + cmgoto (row, col); +} + +/* Erase operations */ + +/* clear from cursor to end of screen */ +clear_to_end () +{ + register int i; + + if (clear_to_end_hook) + { + (*clear_to_end_hook) (); + return; + } + if (TS_clr_to_bottom) + { + background_highlight (); + OUTPUT (TS_clr_to_bottom); + bzero (chars_wasted + curY, screen_height - curY); + } + else + { + for (i = curY; i < screen_height; i++) + { + move_cursor (i, 0); + clear_end_of_line_raw (screen_width); + } + } +} + +/* Clear entire screen */ + +clear_screen () +{ + if (clear_screen_hook) + { + (*clear_screen_hook) (); + return; + } + if (TS_clr_screen) + { + background_highlight (); + OUTPUT (TS_clr_screen); + bzero (chars_wasted, screen_height); + cmat (0, 0); + } + else + { + move_cursor (0, 0); + clear_to_end (); + } +} + +/* Clear to end of line, but do not clear any standout marker. + Assumes that the cursor is positioned at a character of real text, + which implies it cannot be before a standout marker + unless the marker has zero width. + + Note that the cursor may be moved. */ + +clear_end_of_line (first_unused_hpos) + int first_unused_hpos; +{ + if (TN_standout_width == 0 && curX == 0 && chars_wasted[curY] != 0) + output_chars (" ", 1); + clear_end_of_line_raw (first_unused_hpos); +} + +/* Clear from cursor to end of line. + Assume that the line is already clear starting at column first_unused_hpos. + If the cursor is at a standout marker, erase the marker. + + Note that the cursor may be moved, on terminals lacking a `ce' string. */ + +clear_end_of_line_raw (first_unused_hpos) + int first_unused_hpos; +{ + register int i; + first_unused_hpos += chars_wasted[curY] & 077; + if (clear_end_of_line_hook) + { + (*clear_end_of_line_hook) (first_unused_hpos); + return; + } + if (curX >= first_unused_hpos) + return; + /* Notice if we are erasing a magic cookie */ + if (curX == 0) + chars_wasted[curY] = 0; + background_highlight (); + if (TS_clr_line) + { + OUTPUT1 (TS_clr_line); + } + else + { /* have to do it the hard way */ + turn_off_insert (); + for (i = curX; i < first_unused_hpos; i++) + { + if (termscript) + fputc (' ', termscript); + putchar (' '); + } + cmplus (first_unused_hpos - curX); + } +} + +output_chars (string, len) + register char *string; + int len; +{ + register char *p; + register int n; + register char *buf; + register int c; + char *first_check; + + if (output_chars_hook) + { + (*output_chars_hook) (string, len); + return; + } + highlight_if_desired (); + turn_off_insert (); + + /* Don't dare write in last column of bottom line, if AutoWrap, + since that would scroll the whole screen on some terminals. */ + + if (AutoWrap && curY + 1 == screen_height + && curX + len - (chars_wasted[curY] & 077) == screen_width) + len --; + + cmplus (len); + + first_check = string; + + if (RPov > len && !TF_underscore && !TF_hazeltine) + { + fwrite (string, 1, len, stdout); + if (ferror (stdout)) + clearerr (stdout); + if (termscript) + fwrite (string, 1, len, termscript); + } + else + while (--len >= 0) + { + c = *string; + if (RPov + 1 < len && string >= first_check) + { + int repeat_count; + + p = string + 1; + + /* Now, len is number of chars left starting at p */ + while (*p++ == c); + p--; + + repeat_count = p - string; + if (repeat_count > RPov) + { + buf = tparam (TS_repeat, 0, 0, *string, repeat_count); + tputs (buf, repeat_count, cmputc); + free (buf); + string = p; + len -= repeat_count - 1; + continue; + } + else + /* If all N identical chars are too few, + don't even consider the last N-1, the last N-2,... */ + first_check = p; + } + if (c == '_' && TF_underscore) + { + if (termscript) + fputc (' ', termscript); + putchar (' '); + OUTPUT (Left); + } + if (TF_hazeltine && c == '~') + c = '`'; + if (termscript) + fputc (c, termscript); + putchar (c); + string++; + } +} + +/* If start is zero, insert blanks instead of a string at start */ + +insert_chars (start, len) + register char *start; + int len; +{ + register char *buf; + register int c; + + if (insert_chars_hook) + { + (*insert_chars_hook) (start, len); + return; + } + highlight_if_desired (); + + if (TS_ins_multi_chars) + { + buf = tparam (TS_ins_multi_chars, 0, 0, len); + OUTPUT1 (buf); + free (buf); + if (start) + output_chars (start, len); + return; + } + + turn_on_insert (); + cmplus (len); + + if (!TF_underscore && !TF_hazeltine && start + && TS_pad_inserted_char == 0 && TS_ins_char == 0) + { + fwrite (start, 1, len, stdout); + if (termscript) + fwrite (start, 1, len, termscript); + } + else + while (--len >= 0) + { + OUTPUT1_IF (TS_ins_char); + if (!start) + c = ' '; + else + { + c = *start++; + if (TF_hazeltine && c == '~') + c = '`'; + } + if (termscript) + fputc (c, termscript); + putchar (c); + OUTPUT1_IF (TS_pad_inserted_char); + } +} + +delete_chars (n) + register int n; +{ + char *buf; + register int i; + + if (delete_chars_hook) + { + (*delete_chars_hook) (n); + return; + } + + if (delete_in_insert_mode) + { + turn_on_insert (); + } + else + { + turn_off_insert (); + OUTPUT_IF (TS_delete_mode); + } + + if (TS_del_multi_chars) + { + buf = tparam (TS_del_multi_chars, 0, 0, n); + OUTPUT1 (buf); + free (buf); + } + else + for (i = 0; i < n; i++) + OUTPUT1 (TS_del_char); + if (!delete_in_insert_mode) + OUTPUT_IF (TS_end_delete_mode); +} + +/* Insert N lines at vpos VPOS. If N is negative, delete -N lines. */ + +ins_del_lines (vpos, n) + int vpos, n; +{ + char *multi = n > 0 ? TS_ins_multi_lines : TS_del_multi_lines; + char *single = n > 0 ? TS_ins_line : TS_del_line; + char *scroll = n > 0 ? TS_rev_scroll : TS_fwd_scroll; + + register int i = n > 0 ? n : -n; + register char *buf; + + if (ins_del_lines_hook) + { + (*ins_del_lines_hook) (vpos, n); + return; + } + + /* If the lines below the insertion are being pushed + into the end of the window, this is the same as clearing; + and we know the lines are already clear, since the matching + deletion has already been done. So can ignore this. */ + /* If the lines below the deletion are blank lines coming + out of the end of the window, don't bother, + as there will be a matching inslines later that will flush them. */ + if (scroll_region_ok && vpos + i >= specified_window) + return; + if (!memory_below_screen && vpos + i >= screen_height) + return; + + if (multi) + { + raw_move_cursor (vpos, 0); + background_highlight (); + buf = tparam (multi, 0, 0, i); + OUTPUT (buf); + free (buf); + } + else if (single) + { + raw_move_cursor (vpos, 0); + background_highlight (); + while (--i >= 0) + OUTPUT (single); + if (TF_teleray) + curX = 0; + } + else + { + set_scroll_region (vpos, specified_window); + if (n < 0) + raw_move_cursor (specified_window - 1, 0); + else + raw_move_cursor (vpos, 0); + background_highlight (); + while (--i >= 0) + OUTPUTL (scroll, specified_window - vpos); + set_scroll_region (0, specified_window); + } + + if (TN_standout_width >= 0) + { + register lower_limit + = scroll_region_ok ? specified_window : screen_height; + if (n < 0) + { + bcopy (&chars_wasted[vpos - n], &chars_wasted[vpos], + lower_limit - vpos + n); + bzero (&chars_wasted[lower_limit + n], - n); + } + else + { + bcopy (&chars_wasted[vpos], ©buf[vpos], lower_limit - vpos - n); + bcopy (©buf[vpos], &chars_wasted[vpos + n], + lower_limit - vpos - n); + bzero (&chars_wasted[vpos], n); + } + } + if (!scroll_region_ok && memory_below_screen && n < 0) + { + move_cursor (screen_height + n, 0); + clear_to_end (); + } +} + +extern int cost; /* In cm.c */ +extern evalcost (); + +/* Compute cost of sending "str", in characters, + not counting any line-dependent padding. */ +string_cost (str) + char *str; +{ + cost = 0; + if (str) + tputs (str, 0, evalcost); + return cost; +} + +/* Compute cost of sending "str", in characters, + counting any line-dependent padding at one line. */ +string_cost_one_line (str) + char *str; +{ + cost = 0; + if (str) + tputs (str, 1, evalcost); + return cost; +} + +/* Compute per line amount of line-dependent padding, + in tenths of characters. */ +per_line_cost (str) + register char *str; +{ + cost = 0; + if (str) + tputs (str, 0, evalcost); + cost = - cost; + if (str) + tputs (str, 10, evalcost); + return cost; +} + +/* ARGSUSED */ +calculate_ins_del_char_costs () +{ + int ins_startup_cost, del_startup_cost; + int ins_cost_per_char, del_cost_per_char; + register int i; + register int *p; + + if (TS_ins_multi_chars) + { + ins_cost_per_char = 0; + ins_startup_cost = string_cost_one_line (TS_ins_multi_chars); + } + else if (TS_ins_char || TS_pad_inserted_char + || (TS_insert_mode && TS_end_insert_mode)) + { + ins_startup_cost = (30 * (string_cost (TS_insert_mode) + string_cost (TS_end_insert_mode))) / 100; + ins_cost_per_char = (string_cost_one_line (TS_ins_char) + + string_cost_one_line (TS_pad_inserted_char)); + } + else + { + ins_startup_cost = 9999; + ins_cost_per_char = 0; + } + + if (TS_del_multi_chars) + { + del_cost_per_char = 0; + del_startup_cost = string_cost_one_line (TS_del_multi_chars); + } + else if (TS_del_char) + { + del_startup_cost = (string_cost (TS_delete_mode) + + string_cost (TS_end_delete_mode)); + if (delete_in_insert_mode) + del_startup_cost /= 2; + del_cost_per_char = string_cost_one_line (TS_del_char); + } + else + { + del_startup_cost = 9999; + del_cost_per_char = 0; + } + + /* Delete costs are at negative offsets */ + p = &DCICcost[0]; + for (i = screen_width; --i >= 0;) + *--p = (del_startup_cost += del_cost_per_char); + + /* Doing nothing is free */ + p = &DCICcost[0]; + *p++ = 0; + + /* Insert costs are at positive offsets */ + for (i = screen_width; --i >= 0;) + *p++ = (ins_startup_cost += ins_cost_per_char); +} + +calculate_costs () +{ + register char *s + = TS_set_scroll_region ? TS_set_scroll_region : TS_set_scroll_region_1; + + if (chars_wasted != 0) + chars_wasted = (char *) xrealloc (chars_wasted, screen_height); + else + chars_wasted = (char *) xmalloc (screen_height); + bzero (chars_wasted, screen_height); + + if (copybuf != 0) + copybuf = (char *) xrealloc (copybuf, screen_height); + else + copybuf = (char *) xmalloc (screen_height); + + if (DC_ICcost != 0) + DC_ICcost = (int *) xrealloc (DC_ICcost, + (2 * screen_width + 1) * sizeof (int)); + else + DC_ICcost = (int *) xmalloc ((2 * screen_width + 1) * sizeof (int)); + + /* Always call CalcIDCosts because it allocates some vectors. + That function handles dont_calculate_costs. */ + if (s && (!TS_ins_line && !TS_del_line)) + CalcIDCosts (TS_rev_scroll, TS_ins_multi_lines, + TS_fwd_scroll, TS_del_multi_lines, + s, s); + else + CalcIDCosts (TS_ins_line, TS_ins_multi_lines, + TS_del_line, TS_del_multi_lines, + 0, 0); + + if (dont_calculate_costs) + { + bzero (DC_ICcost, 2 * screen_width * sizeof (int)); + return; + } + + calculate_ins_del_char_costs (); + + /* Don't use TS_repeat if its padding is worse than sending the chars */ + if (TS_repeat && per_line_cost (TS_repeat) * baud_rate < 9000) + RPov = string_cost (TS_repeat); + else + RPov = screen_width * 2; + + cmcostinit (); /* set up cursor motion costs */ +} + +term_init (terminal_type) + char *terminal_type; +{ + char *area; + char **address = &area; + char buffer[4092]; + register char *p; + int status; + + extern char *tgetstr (); + + Wcm_clear (); + dont_calculate_costs = 0; + + status = tgetent (buffer, terminal_type); + if (status < 0) + fatal ("Cannot open termcap database file.\n"); + if (status == 0) + fatal ("Terminal type %s is not defined.\n", terminal_type); + +#ifdef TERMINFO + area = (char *) malloc (4092); +#else + area = (char *) malloc (strlen (buffer)); +#endif /* not TERMINFO */ + if (area == 0) + abort (); + + TS_ins_line = tgetstr ("al", address); + TS_ins_multi_lines = tgetstr ("AL", address); + TS_bell = tgetstr ("bl", address); + TS_clr_to_bottom = tgetstr ("cd", address); + TS_clr_line = tgetstr ("ce", address); + TS_clr_screen = tgetstr ("cl", address); + ColPosition = tgetstr ("ch", address); + AbsPosition = tgetstr ("cm", address); + CR = tgetstr ("cr", address); + TS_set_scroll_region = tgetstr ("cs", address); + TS_set_scroll_region_1 = tgetstr ("cS", address); + RowPosition = tgetstr ("cv", address); + TS_del_char = tgetstr ("dc", address); + TS_del_multi_chars = tgetstr ("DC", address); + TS_del_line = tgetstr ("dl", address); + TS_del_multi_lines = tgetstr ("DL", address); + TS_delete_mode = tgetstr ("dm", address); + TS_end_delete_mode = tgetstr ("ed", address); + TS_end_insert_mode = tgetstr ("ei", address); + Home = tgetstr ("ho", address); + TS_ins_char = tgetstr ("ic", address); + TS_ins_multi_chars = tgetstr ("IC", address); + TS_insert_mode = tgetstr ("im", address); + TS_pad_inserted_char = tgetstr ("ip", address); + TS_end_keypad_mode = tgetstr ("ke", address); + TS_keypad_mode = tgetstr ("ks", address); + LastLine = tgetstr ("ll", address); + Right = tgetstr ("nd", address); + Down = tgetstr ("do", address); + if (!Down) + Down = tgetstr ("nl", address); /* Obsolete name for "do" */ +#ifdef VMS + /* VMS puts a carriage return before each linefeed, + so it is not safe to use linefeeds. */ + if (Down && Down[0] == '\n' && Down[1] == '\0') + Down = 0; +#endif /* VMS */ + if (tgetflag ("bs")) + Left = "\b"; /* can't possibly be longer! */ + else /* (Actually, "bs" is obsolete...) */ + Left = tgetstr ("le", address); + if (!Left) + Left = tgetstr ("bc", address); /* Obsolete name for "le" */ + TS_pad_char = tgetstr ("pc", address); + TS_repeat = tgetstr ("rp", address); + TS_end_standout_mode = tgetstr ("se", address); + TS_fwd_scroll = tgetstr ("sf", address); + TS_standout_mode = tgetstr ("so", address); + TS_rev_scroll = tgetstr ("sr", address); + Wcm.cm_tab = tgetstr ("ta", address); + TS_end_termcap_modes = tgetstr ("te", address); + TS_termcap_modes = tgetstr ("ti", address); + Up = tgetstr ("up", address); + TS_visible_bell = tgetstr ("vb", address); + TS_end_visual_mode = tgetstr ("ve", address); + TS_visual_mode = tgetstr ("vs", address); + TS_set_window = tgetstr ("wi", address); + + AutoWrap = tgetflag ("am"); + memory_below_screen = tgetflag ("db"); + TF_hazeltine = tgetflag ("hz"); + must_write_spaces = tgetflag ("in"); + meta_key = tgetflag ("km") || tgetflag ("MT"); + TF_insmode_motion = tgetflag ("mi"); + TF_standout_motion = tgetflag ("ms"); + TF_underscore = tgetflag ("ul"); + MagicWrap = tgetflag ("xn"); + TF_xs = tgetflag ("xs"); + TF_teleray = tgetflag ("xt"); + + /* Get screen size from system, or else from termcap. */ + get_screen_size (&screen_width, &screen_height); + if (screen_width <= 0) + screen_width = tgetnum ("co"); + if (screen_height <= 0) + screen_height = tgetnum ("li"); + + min_padding_speed = tgetnum ("pb"); + TN_standout_width = tgetnum ("sg"); + TabWidth = tgetnum ("tw"); + +#ifdef VMS + /* These capabilities commonly use ^J. + I don't know why, but sending them on VMS does not work; + it causes following spaces to be lost, sometimes. + For now, the simplest fix is to avoid using these capabilities ever. */ + if (Down && Down[0] == '\n') + Down = 0; +#endif /* VMS */ + + if (!TS_bell) + TS_bell = "\07"; + + if (!TS_fwd_scroll) + TS_fwd_scroll = Down; + + PC = TS_pad_char ? *TS_pad_char : 0; + + if (TabWidth < 0) + TabWidth = 8; + +/* Turned off since /etc/termcap seems to have :ta= for most terminals + and newer termcap doc does not seem to say there is a default. + if (!Wcm.cm_tab) + Wcm.cm_tab = "\t"; +*/ + + if (TS_standout_mode == 0) + { + TN_standout_width = tgetnum ("ug"); + TS_end_standout_mode = tgetstr ("ue", address); + TS_standout_mode = tgetstr ("us", address); + } + + if (TF_teleray) + { + Wcm.cm_tab = 0; + /* Teleray: most programs want a space in front of TS_standout_mode, + but Emacs can do without it (and give one extra column). */ + TS_standout_mode = "\033RD"; + TN_standout_width = 1; + /* But that means we cannot rely on ^M to go to column zero! */ + CR = 0; + /* LF can't be trusted either -- can alter hpos */ + /* if move at column 0 thru a line with TS_standout_mode */ + Down = 0; + } + + /* Special handling for certain terminal types known to need it */ + + if (!strcmp (terminal_type, "supdup")) + { + memory_below_screen = 1; + Wcm.cm_losewrap = 1; + } + if (!strncmp (terminal_type, "c10", 3) + || !strcmp (terminal_type, "perq")) + { + /* Supply a makeshift :wi string. + This string is not valid in general since it works only + for windows starting at the upper left corner; + but that is all Emacs uses. + + This string works only if the screen is using + the top of the video memory, because addressing is memory-relative. + So first check the :ti string to see if that is true. + + It would be simpler if the :wi string could go in the termcap + entry, but it can't because it is not fully valid. + If it were in the termcap entry, it would confuse other programs. */ + if (!TS_set_window) + { + p = TS_termcap_modes; + while (*p && strcmp (p, "\033v ")) + p++; + if (*p) + TS_set_window = "\033v%C %C %C %C "; + } + /* Termcap entry often fails to have :in: flag */ + must_write_spaces = 1; + /* :ti string typically fails to have \E^G! in it */ + /* This limits scope of insert-char to one line. */ + strcpy (area, TS_termcap_modes); + strcat (area, "\033\007!"); + TS_termcap_modes = area; + area += strlen (area) + 1; + p = AbsPosition; + /* Change all %+ parameters to %C, to handle + values above 96 correctly for the C100. */ + while (*p) + { + if (p[0] == '%' && p[1] == '+') + p[1] = 'C'; + p++; + } + } + + ScreenRows = screen_height; + ScreenCols = screen_width; + specified_window = screen_height; + + if (Wcm_init ()) /* can't do cursor motion */ +#ifdef VMS + fatal ("Terminal type \"%s\" is not powerful enough to run Emacs.\n\ +It lacks the ability to position the cursor.\n\ +If that is not the actual type of terminal you have, use either the\n\ +DCL command `SET TERMINAL/DEVICE= ...' for DEC-compatible terminals,\n\ +or `define EMACS_TERM \"terminal type\"' for non-DEC terminals.\n", + terminal_type); +#else + fatal ("Terminal type \"%s\" is not powerful enough to run Emacs.\n\ +It lacks the ability to position the cursor.\n\ +If that is not the actual type of terminal you have,\n\ +use the C-shell command `setenv TERM ...' to specify the correct type.\n\ +It may be necessary to do `unsetenv TERMCAP' as well.\n", + terminal_type); +#endif + + delete_in_insert_mode + = TS_delete_mode && TS_insert_mode + && !strcmp (TS_delete_mode, TS_insert_mode); + + se_is_so = TS_standout_mode && TS_end_standout_mode + && !strcmp (TS_standout_mode, TS_end_standout_mode); + + /* Remove width of standout marker from usable width of line */ + if (TN_standout_width > 0) + screen_width -= TN_standout_width; + + UseTabs = tabs_safe_p () && TabWidth == 8; + + scroll_region_ok = TS_set_window || TS_set_scroll_region + || TS_set_scroll_region_1; + + line_ins_del_ok = (((TS_ins_line || TS_ins_multi_lines) + && (TS_del_line || TS_del_multi_lines)) + || (scroll_region_ok + && TS_fwd_scroll + && TS_rev_scroll)); + + char_ins_del_ok = ((TS_ins_char || TS_insert_mode || + TS_pad_inserted_char || TS_ins_multi_chars) + && (TS_del_char || TS_del_multi_chars)); + + fast_clear_end_of_line = TS_clr_line != 0; + + init_baud_rate (); + if (read_socket_hook) /* Baudrate is somewhat */ + /* meaningless in this case */ + baud_rate = 9600; +} + +/* VARARGS 1 */ +fatal (str, arg1, arg2) + char *str; +{ + fprintf (stderr, "emacs: "); + fprintf (stderr, str, arg1, arg2); + fflush (stderr); + exit (1); +} |