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/*
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 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
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 * Copyright (C) 1999-2009 Hiroyuki Yamamoto
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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 */
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#ifdef HAVE_CONFIG_H
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#  include "config.h"
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#endif
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#include "defs.h"
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#include <glib.h>
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#include <glib/gi18n.h>
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#include <gdk/gdkkeysyms.h>
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#include <gtk/gtkwidget.h>
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#include <gtk/gtkwindow.h>
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#include <gtk/gtksignal.h>
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#include <gtk/gtkvbox.h>
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#include <gtk/gtkhbox.h>
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#include <gtk/gtklabel.h>
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#include <gtk/gtkhseparator.h>
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#include <gtk/gtkscrolledwindow.h>
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#include <gtk/gtktextview.h>
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#include <gtk/gtkbutton.h>
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#include <gtk/gtkstock.h>
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#if HAVE_SYS_UTSNAME_H
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#  include <sys/utsname.h>
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#endif
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#include "about.h"
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#include "gtkutils.h"
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#include "stock_pixmap.h"
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#include "prefs_common.h"
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#include "utils.h"
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#include "version.h"
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static GtkWidget *window;
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static void about_create(void);
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static gboolean key_pressed(GtkWidget *widget, GdkEventKey *event);
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static void about_uri_clicked(GtkButton *button, gpointer data);
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void about_show(void)
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{
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        if (!window)
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                about_create();
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        else
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                gtk_window_present(GTK_WINDOW(window));
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}
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static void about_create(void)
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{
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        GtkWidget *vbox;
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        GtkWidget *pixmap;
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        GtkWidget *label;
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        GtkWidget *hbox;
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        GtkWidget *button;
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        GtkWidget *scrolledwin;
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        GtkWidget *text;
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        GtkWidget *confirm_area;
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        GtkWidget *ok_button;
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        GtkTextBuffer *buffer;
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        GtkTextIter iter;
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        GtkStyle *style;
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        GdkColormap *cmap;
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        GdkColor uri_color[2] = {{0, 0, 0, 0xffff}, {0, 0xffff, 0, 0}};
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        gboolean success[2];
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#if HAVE_SYS_UTSNAME_H
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        struct utsname utsbuf;
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#endif
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        gchar buf[1024];
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        gint i;
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        window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
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        gtk_window_set_title(GTK_WINDOW(window), _("About"));
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        gtk_container_set_border_width(GTK_CONTAINER(window), 8);
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        gtk_widget_set_size_request(window, 518, 358);
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        gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
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        g_signal_connect(G_OBJECT(window), "delete_event",
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                         G_CALLBACK(gtk_widget_hide_on_delete), NULL);
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        g_signal_connect(G_OBJECT(window), "key_press_event",
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                         G_CALLBACK(key_pressed), NULL);
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        gtk_widget_realize(window);
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        vbox = gtk_vbox_new(FALSE, 6);
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        gtk_container_add(GTK_CONTAINER(window), vbox);
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        pixmap = stock_pixbuf_widget(window, STOCK_PIXMAP_SYLPHEED_LOGO);
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        gtk_box_pack_start(GTK_BOX(vbox), pixmap, FALSE, FALSE, 0);
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        label = gtk_label_new("version "VERSION);
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        gtk_label_set_selectable(GTK_LABEL(label), TRUE);
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        gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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#if HAVE_SYS_UTSNAME_H
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        uname(&utsbuf);
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        g_snprintf(buf, sizeof(buf),
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                   "GTK+ %d.%d.%d / GLib %d.%d.%d\n"
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                   "Operating System: %s %s (%s)",
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                   gtk_major_version, gtk_minor_version, gtk_micro_version,
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                   glib_major_version, glib_minor_version, glib_micro_version,
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                   utsbuf.sysname, utsbuf.release, utsbuf.machine);
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#elif defined(G_OS_WIN32)
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        g_snprintf(buf, sizeof(buf),
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                   "GTK+ %d.%d.%d / GLib %d.%d.%d\n"
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                   "Operating System: %s",
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                   gtk_major_version, gtk_minor_version, gtk_micro_version,
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                   glib_major_version, glib_minor_version, glib_micro_version,
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                   "Win32");
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#else
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        g_snprintf(buf, sizeof(buf),
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                   "GTK+ %d.%d.%d / GLib %d.%d.%d\n"
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                   "Operating System: unknown",
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                   gtk_major_version, gtk_minor_version, gtk_micro_version,
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                   glib_major_version, glib_minor_version, glib_micro_version);
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#endif
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        label = gtk_label_new(buf);
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        gtk_label_set_selectable(GTK_LABEL(label), TRUE);
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        gtk_label_set_justify(GTK_LABEL(label), GTK_JUSTIFY_CENTER);
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        gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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        g_snprintf(buf, sizeof(buf),
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                   "Compiled-in features:%s",
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#if USE_THREADS
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                   " gthread"
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#endif
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#if INET6
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                   " IPv6"
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#endif
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#if HAVE_ICONV
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                   " iconv"
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#endif
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#if HAVE_LIBCOMPFACE
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                   " compface"
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#endif
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#if USE_GPGME
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                   " GnuPG"
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#endif
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#if USE_SSL
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                   " OpenSSL"
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#endif
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#if USE_LDAP
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                   " LDAP"
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#endif
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#if USE_JPILOT
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                   " JPilot"
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#endif
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#if USE_GTKSPELL
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                   " GtkSpell"
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#endif
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#if USE_ONIGURUMA
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                   " Oniguruma"
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#endif
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        "");
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        label = gtk_label_new(buf);
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        gtk_label_set_selectable(GTK_LABEL(label), TRUE);
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        gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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        label = gtk_label_new
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                ("Copyright (C) 1999-2009 Hiroyuki Yamamoto <hiro-y@kcn.ne.jp>");
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        gtk_label_set_selectable(GTK_LABEL(label), TRUE);
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        gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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        hbox = gtk_hbox_new(FALSE, 0);
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        gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
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        button = gtk_button_new_with_label(" "HOMEPAGE_URI" ");
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        gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, FALSE, 0);
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        gtk_button_set_relief(GTK_BUTTON(button), GTK_RELIEF_NONE);
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        g_signal_connect(G_OBJECT(button), "clicked",
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                         G_CALLBACK(about_uri_clicked), NULL);
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        buf[0] = ' ';
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        for (i = 1; i <= strlen(HOMEPAGE_URI); i++) buf[i] = '_';
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        strcpy(buf + i, " ");
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        gtk_label_set_pattern(GTK_LABEL(GTK_BIN(button)->child), buf);
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        cmap = gdk_window_get_colormap(window->window);
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        gdk_colormap_alloc_colors(cmap, uri_color, 2, FALSE, TRUE, success);
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        if (success[0] == TRUE && success[1] == TRUE) {
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                gtk_widget_ensure_style(GTK_BIN(button)->child);
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                style = gtk_style_copy
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                        (gtk_widget_get_style(GTK_BIN(button)->child));
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                style->fg[GTK_STATE_NORMAL]   = uri_color[0];
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                style->fg[GTK_STATE_ACTIVE]   = uri_color[1];
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                style->fg[GTK_STATE_PRELIGHT] = uri_color[0];
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                gtk_widget_set_style(GTK_BIN(button)->child, style);
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        } else
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                g_warning("about_create(): color allocation failed.\n");
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        scrolledwin = gtk_scrolled_window_new(NULL, NULL);
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        gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
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                                       GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
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        gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolledwin),
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                                            GTK_SHADOW_IN);
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        gtk_box_pack_start(GTK_BOX(vbox), scrolledwin, TRUE, TRUE, 0);
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        text = gtk_text_view_new();
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        gtk_text_view_set_editable(GTK_TEXT_VIEW(text), FALSE);
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        gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(text), GTK_WRAP_WORD);
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        gtk_text_view_set_left_margin(GTK_TEXT_VIEW(text), 6);
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        gtk_text_view_set_right_margin(GTK_TEXT_VIEW(text), 6);
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        gtk_container_add(GTK_CONTAINER(scrolledwin), text);
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        buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text));
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        gtk_text_buffer_get_iter_at_offset(buffer, &iter, 0);
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#if USE_GPGME
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        gtk_text_buffer_insert(buffer, &iter,
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                _("GPGME is copyright 2001 by Werner Koch <dd9jn@gnu.org>\n\n"), -1);
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#endif /* USE_GPGME */
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        gtk_text_buffer_insert(buffer, &iter,
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                _("This program is free software; you can redistribute it and/or modify "
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                  "it under the terms of the GNU General Public License as published by "
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                  "the Free Software Foundation; either version 2, or (at your option) "
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                  "any later version.\n\n"), -1);
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        gtk_text_buffer_insert(buffer, &iter,
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                _("This program is distributed in the hope that it will be useful, "
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                  "but WITHOUT ANY WARRANTY; without even the implied warranty of "
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                  "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. "
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                  "See the GNU General Public License for more details.\n\n"), -1);
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        gtk_text_buffer_insert(buffer, &iter,
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                _("You should have received a copy of the GNU General Public License "
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                  "along with this program; if not, write to the Free Software "
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                  "Foundation, Inc., 59 Temple Place - Suite 330, Boston, "
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                  "MA 02111-1307, USA."), -1);
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        gtk_text_buffer_get_start_iter(buffer, &iter);
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        gtk_text_buffer_place_cursor(buffer, &iter);
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        gtkut_stock_button_set_create(&confirm_area, &ok_button, GTK_STOCK_OK,
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                                      NULL, NULL, NULL, NULL);
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        gtk_box_pack_end(GTK_BOX(vbox), confirm_area, FALSE, FALSE, 0);
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        gtk_widget_grab_default(ok_button);
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        gtk_widget_grab_focus(ok_button);
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        g_signal_connect_closure
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                (G_OBJECT(ok_button), "clicked",
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                 g_cclosure_new_swap(G_CALLBACK(gtk_widget_hide_on_delete),
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                                     window, NULL), FALSE);
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        gtk_widget_show_all(window);
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}
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static gboolean key_pressed(GtkWidget *widget, GdkEventKey *event)
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{
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        if (event && event->keyval == GDK_Escape)
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                gtk_widget_hide(window);
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        return FALSE;
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}
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static void about_uri_clicked(GtkButton *button, gpointer data)
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{
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        open_uri(HOMEPAGE_URI, prefs_common.uri_cmd);
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}