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wireshark/gtk/colors.c

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/* colors.c
* Definitions for color structures and routines
*
* $Id: colors.c,v 1.7 2001/02/01 20:21:21 gram Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
* Copyright 1998 Gerald Combs
*
*
* 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
* of the License, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gtk/gtk.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <epan.h>
#include "gtk/main.h"
#include "packet.h"
#include "colors.h"
#include "file.h"
#include "dfilter/dfilter.h"
#include "simple_dialog.h"
#include "util.h"
extern capture_file cf;
static gboolean read_filters(colfilter *filter);
GSList *filter_list;
static GdkColormap* sys_cmap;
static GdkColormap* our_cmap = NULL;
GdkColor WHITE = { 0, 65535, 65535, 65535 };
GdkColor BLACK = { 0, 0, 0, 0 };
/* This structure is used to allow you to compile in default colors if
* you wish. They can be later changed by a user.
*/
#ifdef READ_DEFAULT_COLOR_LIST
struct _default_colors {
gchar* proto;
gchar* color; /* background only */
} default_colors[] = {
{"arp", "green2"},
{"ip", "light red"},
{"tcp", "light blue"}
};
#endif
colfilter *
colfilter_new(void)
{
colfilter *filter;
gboolean got_white, got_black;
#ifdef READ_DEFAULT_COLOR_LIST
color_filter_t *colorf;
gint i;
GdkColor color;
#endif
filter = (colfilter *)g_malloc(sizeof(colfilter));
filter->num_of_filters = 0;
sys_cmap = gdk_colormap_get_system();
/* Allocate "constant" colors. */
got_white = get_color(&WHITE);
got_black = get_color(&BLACK);
/* Got milk? */
if (!got_white) {
if (!got_black)
simple_dialog(ESD_TYPE_WARN, NULL, "Could not allocate colors black or white.");
else
simple_dialog(ESD_TYPE_WARN, NULL, "Could not allocate color white.");
} else {
if (!got_black)
simple_dialog(ESD_TYPE_WARN, NULL, "Could not allocate color black.");
}
#ifdef READ_DEFAULT_COLOR_LIST
/* Now process defaults */
for (i = 0 ; i < sizeof default_colors/sizeof (struct _default_colors); i++){
gdk_color_parse(default_colors[i].color, &color);
if( !get_color(&color)){
/* oops */
simple_dialog(ESD_TYPE_WARN, NULL, "Could not allocate color %s.",
default_colors[i].color);
}
colorf = new_color_filter(filter, default_colors[i].proto,
default_colors[i].proto);
colorf->bg_color = color;
if (!dfilter_compile(default_colors[i].proto,
&colorf->c_colorfilter)) {
simple_dialog(ESD_TYPE_WARN, NULL,
"Cannot compile default color filter %s.\n%s",
default_colors[i].proto, dfilter_error_msg);
/* should reject this filter */
}
filter->num_of_filters++;
}
#endif
read_filters(filter);
return filter;
}
color_filter_t *
new_color_filter(colfilter *filters, gchar *name, gchar *filter_string)
{
color_filter_t *colorf;
colorf = (color_filter_t *)g_malloc(sizeof (color_filter_t));
colorf->filter_name = g_strdup(name);
colorf->filter_text = g_strdup(filter_string);
colorf->bg_color = WHITE;
colorf->fg_color = BLACK;
colorf->c_colorfilter = NULL;
colorf->edit_dialog = NULL;
filter_list = g_slist_append(filter_list, colorf);
return colorf;
}
void
delete_color_filter(color_filter_t *colorf)
{
if (colorf->filter_name != NULL)
g_free(colorf->filter_name);
if (colorf->filter_text != NULL)
g_free(colorf->filter_text);
if (colorf->c_colorfilter != NULL)
dfilter_free(colorf->c_colorfilter);
filter_list = g_slist_remove(filter_list, colorf);
g_free(colorf);
}
static gboolean
read_filters(colfilter *filter)
{
/* TODO: Lots more syntax checking on the file */
/* I hate these fixed length names! TODO: make more dynamic */
/* XXX - buffer overflow possibility here */
gchar name[256],filter_exp[256], buf[1024];
guint16 fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
GdkColor fg_color, bg_color;
color_filter_t *colorf;
int i;
FILE *f;
gchar *path;
gchar *fname = PF_DIR "/colorfilters";
dfilter_t *temp_dfilter;
/* decide what file to open (from dfilter code) */
/* should only be called by colors_init.
*/
if(filter == NULL)
return FALSE;
/* we have a clist */
path = (gchar *) g_malloc(strlen(get_home_dir()) + strlen(fname) + 4);
sprintf(path, "%s/%s", get_home_dir(), fname);
if ((f = fopen(path, "r")) == NULL) {
if (errno != ENOENT) {
simple_dialog(ESD_TYPE_CRIT, NULL,
"Could not open filter file\n\"%s\": %s.", path,
strerror(errno));
}
g_free(path);
return FALSE;
}
g_free(path);
i = 0;
do{
if(!fgets(buf,sizeof buf, f))
break;
if(strspn( buf," \t") == (strchr(buf,'*') - buf)){
/* leading # comment */
continue;
}
/* we get the @ delimiter. It is not in any strings */
if(sscanf(buf," @%[^@]@%[^@]@[%hu,%hu,%hu][%hu,%hu,%hu]",
name, filter_exp, &bg_r, &bg_g, &bg_b, &fg_r, &fg_g, &fg_b) == 8){
/* we got a filter */
if(!dfilter_compile(filter_exp, &temp_dfilter)) {
simple_dialog(ESD_TYPE_CRIT, NULL,
"Could not compile color filter %s from saved filters.\n%s",
name, dfilter_error_msg);
continue;
}
colorf = new_color_filter(filter, name, filter_exp);
colorf->c_colorfilter = temp_dfilter;
filter->num_of_filters++;
fg_color.red = fg_r;
fg_color.green = fg_g;
fg_color.blue = fg_b;
bg_color.red = bg_r;
bg_color.green = bg_g;
bg_color.blue = bg_b;
if( !get_color(&fg_color)){
/* oops */
simple_dialog(ESD_TYPE_WARN, NULL, "Could not allocate fg color specified"
"in input file for %s.", name);
i++;
continue;
}
if( !get_color(&bg_color)){
/* oops */
simple_dialog(ESD_TYPE_WARN, NULL, "Could not allocate bg color specified"
"in input file for %s.", name);
i++;
continue;
}
colorf->bg_color = bg_color;
colorf->fg_color = fg_color;
i++;
} /* if sscanf */
} while( !feof(f));
return TRUE;
}
static void
write_filter(gpointer filter_arg, gpointer file_arg)
{
color_filter_t *colorf = filter_arg;
FILE *f = file_arg;
fprintf(f,"@%s@%s@[%d,%d,%d][%d,%d,%d]\n",
colorf->filter_name,
colorf->filter_text,
colorf->bg_color.red,
colorf->bg_color.green,
colorf->bg_color.blue,
colorf->fg_color.red,
colorf->fg_color.green,
colorf->fg_color.blue);
}
gboolean
write_filters(colfilter *filter)
{
FILE *f;
gchar *path;
gchar *name = PF_DIR "/colorfilters";
/* decide what file to open (from dfilter code) */
path = (gchar *) g_malloc(strlen(get_home_dir()) + strlen(name) + 4);
sprintf(path, "%s/%s", get_home_dir(), name);
if ((f = fopen(path, "w+")) == NULL) {
simple_dialog(ESD_TYPE_CRIT, NULL,
"Could not open\n%s\nfor writing: %s.",
path, strerror(errno));
g_free(path);
return FALSE;
}
fprintf(f,"# DO NOT EDIT THIS FILE! It was created by Ethereal\n");
g_slist_foreach(filter_list, write_filter, f);
fclose(f);
g_free(path);
return TRUE;
}
gboolean
get_color (GdkColor *new_color)
{
GdkVisual *pv;
if (!our_cmap) {
if ( !gdk_colormap_alloc_color (sys_cmap, new_color, FALSE, TRUE)) {
pv = gdk_visual_get_best();
if ( !(our_cmap = gdk_colormap_new(pv, TRUE)))
simple_dialog(ESD_TYPE_WARN, NULL, "Could not create new colormap");
} else
return (TRUE);
}
return ( gdk_colormap_alloc_color ( our_cmap, new_color, FALSE, TRUE) );
}
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