diff options
Diffstat (limited to 'contrib/ncurses/ncurses/tinfo/trim_sgr0.c')
| -rw-r--r-- | contrib/ncurses/ncurses/tinfo/trim_sgr0.c | 326 |
1 files changed, 0 insertions, 326 deletions
diff --git a/contrib/ncurses/ncurses/tinfo/trim_sgr0.c b/contrib/ncurses/ncurses/tinfo/trim_sgr0.c deleted file mode 100644 index 80c8f77..0000000 --- a/contrib/ncurses/ncurses/tinfo/trim_sgr0.c +++ /dev/null @@ -1,326 +0,0 @@ -/**************************************************************************** - * Copyright (c) 2005-2006,2007 Free Software Foundation, Inc. * - * * - * Permission is hereby granted, free of charge, to any person obtaining a * - * copy of this software and associated documentation files (the * - * "Software"), to deal in the Software without restriction, including * - * without limitation the rights to use, copy, modify, merge, publish, * - * distribute, distribute with modifications, sublicense, and/or sell * - * copies of the Software, and to permit persons to whom the Software is * - * furnished to do so, subject to the following conditions: * - * * - * The above copyright notice and this permission notice shall be included * - * in all copies or substantial portions of the Software. * - * * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * - * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * - * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * - * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * - * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * - * * - * Except as contained in this notice, the name(s) of the above copyright * - * holders shall not be used in advertising or otherwise to promote the * - * sale, use or other dealings in this Software without prior written * - * authorization. * - ****************************************************************************/ - -/**************************************************************************** - * Author: Thomas Dickey * - ****************************************************************************/ - -#include <curses.priv.h> - -#include <ctype.h> - -#include <tic.h> -#include <term_entry.h> - -MODULE_ID("$Id: trim_sgr0.c,v 1.8 2007/04/07 17:14:11 tom Exp $") - -#undef CUR -#define CUR tp-> - -#define CSI 233 -#define ESC 033 /* ^[ */ -#define L_BRACK '[' - -static char * -set_attribute_9(TERMTYPE *tp, int flag) -{ - const char *result; - - if ((result = tparm(set_attributes, 0, 0, 0, 0, 0, 0, 0, 0, flag)) == 0) - result = ""; - return strdup(result); -} - -static int -is_csi(const char *s) -{ - if (UChar(s[0]) == CSI) - return 1; - else if (s[0] == ESC && s[1] == L_BRACK) - return 2; - return 0; -} - -static char * -skip_zero(char *s) -{ - if (s[0] == '0') { - if (s[1] == ';') - s += 2; - else if (isalpha(UChar(s[1]))) - s += 1; - } - return s; -} - -static const char * -skip_delay(const char *s) -{ - if (s[0] == '$' && s[1] == '<') { - s += 2; - while (isdigit(UChar(*s)) || *s == '/') - ++s; - if (*s == '>') - ++s; - } - return s; -} - -/* - * Improve similar_sgr a little by moving the attr-string from the beginning - * to the end of the s-string. - */ -static bool -rewrite_sgr(char *s, char *attr) -{ - if (PRESENT(s)) { - if (PRESENT(attr)) { - unsigned len_s = strlen(s); - unsigned len_a = strlen(attr); - - if (len_s > len_a && !strncmp(attr, s, len_a)) { - unsigned n; - TR(TRACE_DATABASE, ("rewrite:\n\t%s", s)); - for (n = 0; n < len_s - len_a; ++n) { - s[n] = s[n + len_a]; - } - strcpy(s + n, attr); - TR(TRACE_DATABASE, ("to:\n\t%s", s)); - } - } - return TRUE; - } - return FALSE; /* oops */ -} - -static bool -similar_sgr(char *a, char *b) -{ - bool result = FALSE; - int csi_a = is_csi(a); - int csi_b = is_csi(b); - unsigned len_a; - unsigned len_b; - - TR(TRACE_DATABASE, ("similar_sgr:\n\t%s\n\t%s", - _nc_visbuf2(1, a), - _nc_visbuf2(2, b))); - if (csi_a != 0 && csi_b != 0 && csi_a == csi_b) { - a += csi_a; - b += csi_b; - if (*a != *b) { - a = skip_zero(a); - b = skip_zero(b); - } - } - len_a = strlen(a); - len_b = strlen(b); - if (len_a && len_b) { - if (len_a > len_b) - result = (strncmp(a, b, len_b) == 0); - else - result = (strncmp(a, b, len_a) == 0); - } - TR(TRACE_DATABASE, ("...similar_sgr: %d\n\t%s\n\t%s", result, - _nc_visbuf2(1, a), - _nc_visbuf2(2, b))); - return result; -} - -static unsigned -chop_out(char *string, unsigned i, unsigned j) -{ - TR(TRACE_DATABASE, ("chop_out %d..%d from %s", i, j, _nc_visbuf(string))); - while (string[j] != '\0') { - string[i++] = string[j++]; - } - string[i] = '\0'; - return i; -} - -/* - * Compare, ignoring delays. Some of the delay values are inconsistent, and - * we do not want to be stopped by that. - * - * Returns the number of chars from 'full' that we matched. If any mismatch - * occurs, return zero. - */ -static int -compare_part(const char *part, const char *full) -{ - const char *next_part; - const char *next_full; - int used_full = 0; - int used_delay = 0; - - while (*part != 0) { - if (*part != *full) { - used_full = 0; - break; - } - - /* - * Adjust the return-value to allow the rare case of - * string<delay>string - * to remove the whole piece. The most common case is a delay at the - * end of the string. The adjusted string will retain the delay, which - * is conservative. - */ - if (used_delay != 0) { - used_full += used_delay; - used_delay = 0; - } - if (*part == '$' && *full == '$') { - next_part = skip_delay(part); - next_full = skip_delay(full); - if (next_part != part && next_full != full) { - used_delay += (next_full - full); - full = next_full; - part = next_part; - continue; - } - } - ++used_full; - ++part; - ++full; - } - return used_full; -} - -/* - * While 'sgr0' is the "same" as termcap 'me', there is a compatibility issue. - * The sgr/sgr0 capabilities include setting/clearing alternate character set - * mode. A termcap application cannot use sgr, so sgr0 strings that reset - * alternate character set mode will be misinterpreted. Here, we remove those - * from the more common ISO/ANSI/VT100 entries, which have sgr0 agreeing with - * sgr. - * - * This function returns the modified sgr0 if it can be modified, a null if - * an error occurs, or the original sgr0 if no change is needed. - */ -NCURSES_EXPORT(char *) -_nc_trim_sgr0(TERMTYPE *tp) -{ - char *result = exit_attribute_mode; - - T((T_CALLED("_nc_trim_sgr0()"))); - - if (PRESENT(exit_attribute_mode) - && PRESENT(set_attributes)) { - bool found = FALSE; - char *on = set_attribute_9(tp, 1); - char *off = set_attribute_9(tp, 0); - char *end = strdup(exit_attribute_mode); - char *tmp; - size_t i, j, k; - - TR(TRACE_DATABASE, ("checking if we can trim sgr0 based on sgr")); - TR(TRACE_DATABASE, ("sgr0 %s", _nc_visbuf(end))); - TR(TRACE_DATABASE, ("sgr(9:off) %s", _nc_visbuf(off))); - TR(TRACE_DATABASE, ("sgr(9:on) %s", _nc_visbuf(on))); - - if (!rewrite_sgr(on, enter_alt_charset_mode) - || !rewrite_sgr(off, exit_alt_charset_mode) - || !rewrite_sgr(end, exit_alt_charset_mode)) { - FreeIfNeeded(off); - } else if (similar_sgr(off, end) - && !similar_sgr(off, on)) { - TR(TRACE_DATABASE, ("adjusting sgr(9:off) : %s", _nc_visbuf(off))); - result = off; - /* - * If rmacs is a substring of sgr(0), remove that chunk. - */ - if (exit_alt_charset_mode != 0) { - TR(TRACE_DATABASE, ("scan for rmacs %s", _nc_visbuf(exit_alt_charset_mode))); - j = strlen(off); - k = strlen(exit_alt_charset_mode); - if (j > k) { - for (i = 0; i <= (j - k); ++i) { - int k2 = compare_part(exit_alt_charset_mode, off + i); - if (k2 != 0) { - found = TRUE; - chop_out(off, i, i + k2); - break; - } - } - } - } - /* - * SGR 10 would reset to normal font. - */ - if (!found) { - if ((i = is_csi(off)) != 0 - && off[strlen(off) - 1] == 'm') { - TR(TRACE_DATABASE, ("looking for SGR 10 in %s", - _nc_visbuf(off))); - tmp = skip_zero(off + i); - if (tmp[0] == '1' - && skip_zero(tmp + 1) != tmp + 1) { - i = tmp - off; - if (off[i - 1] == ';') - i--; - j = skip_zero(tmp + 1) - off; - i = chop_out(off, i, j); - found = TRUE; - } - } - } - if (!found - && (tmp = strstr(end, off)) != 0 - && strcmp(end, off) != 0) { - i = tmp - end; - j = strlen(off); - tmp = strdup(end); - chop_out(tmp, i, j); - free(off); - result = tmp; - } - TR(TRACE_DATABASE, ("...adjusted sgr0 : %s", _nc_visbuf(result))); - if (!strcmp(result, exit_attribute_mode)) { - TR(TRACE_DATABASE, ("...same result, discard")); - free(result); - result = exit_attribute_mode; - } - } else { - /* - * Either the sgr does not reference alternate character set, - * or it is incorrect. That's too hard to decide right now. - */ - free(off); - } - FreeIfNeeded(end); - FreeIfNeeded(on); - } else { - /* - * Possibly some applications are confused if sgr0 contains rmacs, - * but that would be a different bug report -TD - */ - } - - returnPtr(result); -} |
