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/* $Id$ */
/**************************************************************************
* color.c *
* *
* Copyright (C) 2001-2004 Chris Allegretta *
* Copyright (C) 2005-2006 David Lawrence Ramsey *
* This program 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 2, or (at your option) *
* any later version. *
* *
* This program 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 this program; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA *
* 02110-1301, USA. *
* *
**************************************************************************/
#include "proto.h"
#include <stdio.h>
#include <string.h>
#ifdef ENABLE_COLOR
/* For each syntax list entry, go through the list of colors and assign
* color pairs. */
void set_colorpairs(void)
{
const syntaxtype *this_syntax = syntaxes;
for (; this_syntax != NULL; this_syntax = this_syntax->next) {
colortype *this_color = this_syntax->color;
int color_pair = 1;
for (; this_color != NULL; this_color = this_color->next) {
const colortype *beforenow = this_syntax->color;
for (; beforenow != this_color &&
(beforenow->fg != this_color->fg ||
beforenow->bg != this_color->bg ||
beforenow->bright != this_color->bright);
beforenow = beforenow->next)
;
if (beforenow != this_color)
this_color->pairnum = beforenow->pairnum;
else {
this_color->pairnum = color_pair;
color_pair++;
}
}
}
}
/* Initialize the color information. */
void color_init(void)
{
assert(openfile != NULL);
if (has_colors()) {
const colortype *tmpcolor;
#ifdef HAVE_USE_DEFAULT_COLORS
bool defok;
#endif
start_color();
#ifdef HAVE_USE_DEFAULT_COLORS
/* Use the default colors, if available. */
defok = (use_default_colors() != ERR);
#endif
for (tmpcolor = openfile->colorstrings; tmpcolor != NULL;
tmpcolor = tmpcolor->next) {
short foreground = tmpcolor->fg, background = tmpcolor->bg;
if (foreground == -1) {
#ifdef HAVE_USE_DEFAULT_COLORS
if (!defok)
#endif
foreground = COLOR_WHITE;
}
if (background == -1) {
#ifdef HAVE_USE_DEFAULT_COLORS
if (!defok)
#endif
background = COLOR_BLACK;
}
init_pair(tmpcolor->pairnum, foreground, background);
#ifdef DEBUG
fprintf(stderr, "init_pair(): fg = %hd, bg = %hd\n", tmpcolor->fg, tmpcolor->bg);
#endif
}
}
}
/* Update the color information based on the current filename. */
void color_update(void)
{
const syntaxtype *tmpsyntax;
colortype *tmpcolor, *defcolor = NULL;
assert(openfile != NULL);
openfile->colorstrings = NULL;
/* If we specified a syntax override string, use it. */
if (syntaxstr != NULL) {
/* If the syntax override is "none", it's the same as not having
* a syntax at all, so get out. */
if (strcmp(syntaxstr, "none") == 0)
return;
for (tmpsyntax = syntaxes; tmpsyntax != NULL;
tmpsyntax = tmpsyntax->next) {
if (strcmp(tmpsyntax->desc, syntaxstr) == 0)
openfile->colorstrings = tmpsyntax->color;
if (openfile->colorstrings != NULL)
break;
}
}
/* If we didn't specify a syntax override string, or if we did and
* there was no syntax by that name, get the syntax based on the
* file extension. */
if (openfile->colorstrings == NULL) {
for (tmpsyntax = syntaxes; tmpsyntax != NULL;
tmpsyntax = tmpsyntax->next) {
exttype *e;
/* If this is the default syntax, it has no associated
* extensions. (We've checked for this and for duplicate
* syntax names elsewhere.) Skip over it here, but keep
* track of its color regexes. */
if (strcmp(tmpsyntax->desc, "default") == 0) {
defcolor = tmpsyntax->color;
continue;
}
for (e = tmpsyntax->extensions; e != NULL; e = e->next) {
bool not_compiled = (e->ext == NULL);
/* e->ext_regex has already been checked for validity
* elsewhere. Compile its specified regex if we haven't
* already. */
if (not_compiled) {
e->ext = (regex_t *)nmalloc(sizeof(regex_t));
regcomp(e->ext, e->ext_regex, REG_EXTENDED);
}
/* Set colorstrings if we matched the extension
* regex. */
if (regexec(e->ext, openfile->filename, 0, NULL,
0) == 0)
openfile->colorstrings = tmpsyntax->color;
if (openfile->colorstrings != NULL)
break;
/* Decompile e->ext_regex's specified regex if we aren't
* going to use it. */
if (not_compiled) {
regfree(e->ext);
free(e->ext);
e->ext = NULL;
}
}
}
}
/* If we didn't get a syntax based on the file extension, and we
* have a default syntax, use it. */
if (openfile->colorstrings == NULL && defcolor != NULL)
openfile->colorstrings = defcolor;
for (tmpcolor = openfile->colorstrings; tmpcolor != NULL;
tmpcolor = tmpcolor->next) {
/* tmpcolor->start_regex and tmpcolor->end_regex have already
* been checked for validity elsewhere. Compile their specified
* regexes if we haven't already. */
if (tmpcolor->start == NULL) {
tmpcolor->start = (regex_t *)nmalloc(sizeof(regex_t));
regcomp(tmpcolor->start, tmpcolor->start_regex,
REG_EXTENDED | (tmpcolor->icase ? REG_ICASE : 0));
}
if (tmpcolor->end_regex != NULL && tmpcolor->end == NULL) {
tmpcolor->end = (regex_t *)nmalloc(sizeof(regex_t));
regcomp(tmpcolor->end, tmpcolor->end_regex,
REG_EXTENDED | (tmpcolor->icase ? REG_ICASE : 0));
}
}
}
#endif /* ENABLE_COLOR */