forked from osmocom/wireshark
47b176f983
svn path=/trunk/; revision=10372
400 lines
11 KiB
C
400 lines
11 KiB
C
/* help_dlg.c
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*
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* $Id: help_dlg.c,v 1.48 2004/03/13 14:07:14 ulfl Exp $
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*
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* Laurent Deniel <laurent.deniel@free.fr>
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 2000 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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 <gtk/gtk.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include "epan/filesystem.h"
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#include "help_dlg.h"
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#include "prefs.h"
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#include "gtkglobals.h"
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#include "ui_util.h"
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#include "compat_macros.h"
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#include "dlg_utils.h"
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#include "simple_dialog.h"
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#define HELP_DIR "help"
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#define NOTEBOOK_KEY "notebook_key"
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static void help_close_cb(GtkWidget *w, gpointer data);
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static void help_destroy_cb(GtkWidget *w, gpointer data);
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static void insert_text(GtkWidget *w, const char *buffer, int nchars);
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static void set_help_text(GtkWidget *w, const char *help_file_path);
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/*
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* Keep a static pointer to the current "Help" window, if any, so that
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* if somebody tries to do "Help->Help" while there's already a
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* "Help" window up, we just pop up the existing one, rather than
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* creating a new one.
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*/
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static GtkWidget *help_w = NULL;
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/*
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* Keep a list of text widgets and corresponding file names as well
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* (for text format changes).
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*/
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typedef struct {
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char *topic;
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char *pathname;
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GtkWidget *txt;
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} help_page_t;
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static GSList *help_text_pages = NULL;
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/*
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* Helper function to show a simple help text page.
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*/
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static GtkWidget * help_page(const char *topic, const char *filename)
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{
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GtkWidget *page_vb, *txt_scrollw, *txt;
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char *relative_path, *absolute_path;
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help_page_t *page;
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page_vb = gtk_vbox_new(FALSE, 0);
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gtk_container_border_width(GTK_CONTAINER(page_vb), 1);
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txt_scrollw = scrolled_window_new(NULL, NULL);
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#if GTK_MAJOR_VERSION >= 2
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gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(txt_scrollw),
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GTK_SHADOW_IN);
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#endif
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gtk_box_pack_start(GTK_BOX(page_vb), txt_scrollw, TRUE, TRUE, 0);
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#if GTK_MAJOR_VERSION < 2
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gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(txt_scrollw),
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GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
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txt = gtk_text_new(NULL, NULL);
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gtk_text_set_editable(GTK_TEXT(txt), FALSE);
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gtk_text_set_word_wrap(GTK_TEXT(txt), TRUE);
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gtk_text_set_line_wrap(GTK_TEXT(txt), TRUE);
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#else
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gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(txt_scrollw),
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GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
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txt = gtk_text_view_new();
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gtk_text_view_set_editable(GTK_TEXT_VIEW(txt), FALSE);
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gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(txt), GTK_WRAP_WORD);
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gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(txt), FALSE);
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/* XXX: there seems to be no way to add a small border *around* the whole text,
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* so the text will be "bump" against the edges.
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* the following is only working for left and right edges,
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* there is no such thing for top and bottom :-( */
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/* gtk_text_view_set_left_margin(GTK_TEXT_VIEW(txt), 3); */
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/* gtk_text_view_set_right_margin(GTK_TEXT_VIEW(txt), 3); */
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#endif
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relative_path = g_strconcat(HELP_DIR, G_DIR_SEPARATOR_S, filename, NULL);
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absolute_path = get_datafile_path(relative_path);
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g_free(relative_path);
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set_help_text(txt, absolute_path);
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gtk_container_add(GTK_CONTAINER(txt_scrollw), txt);
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gtk_widget_show(txt_scrollw);
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gtk_widget_show(txt);
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gtk_widget_show(page_vb);
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page = g_malloc(sizeof (help_page_t));
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page->topic = g_strdup(topic);
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page->pathname = absolute_path;
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page->txt = txt;
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help_text_pages = g_slist_append(help_text_pages, page);
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return page_vb;
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}
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/*
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* Create and show help dialog.
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*/
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void help_cb(GtkWidget *w _U_, gpointer data _U_)
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{
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GtkWidget *main_vb, *bbox, *help_nb, *close_bt, *label, *topic_vb;
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char line[4096+1]; /* XXX - size? */
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char *p;
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char *filename;
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char *help_toc_file_path;
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FILE *help_toc_file;
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if (help_w != NULL) {
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/* There's already a "Help" dialog box; reactivate it. */
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reactivate_window(help_w);
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return;
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}
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help_toc_file_path = get_datafile_path(HELP_DIR G_DIR_SEPARATOR_S "toc");
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help_toc_file = fopen(help_toc_file_path, "r");
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if (help_toc_file == NULL) {
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simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Could not open file \"%s\": %s",
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help_toc_file_path, strerror(errno));
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g_free(help_toc_file_path);
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return;
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}
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help_w = window_new(GTK_WINDOW_TOPLEVEL, "Ethereal: Help");
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SIGNAL_CONNECT(help_w, "destroy", help_destroy_cb, NULL);
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/* XXX: improve this, e.g. remember the last window size in a file */
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WIDGET_SET_SIZE(help_w, DEF_WIDTH, DEF_HEIGHT);
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gtk_container_border_width(GTK_CONTAINER(help_w), 2);
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/* Container for each row of widgets */
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main_vb = gtk_vbox_new(FALSE, 1);
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gtk_container_border_width(GTK_CONTAINER(main_vb), 1);
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gtk_container_add(GTK_CONTAINER(help_w), main_vb);
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gtk_widget_show(main_vb);
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/* help topics container */
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help_nb = gtk_notebook_new();
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gtk_container_add(GTK_CONTAINER(main_vb), help_nb);
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OBJECT_SET_DATA(help_w, NOTEBOOK_KEY, help_nb);
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/* help topics */
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while (fgets(line, sizeof line, help_toc_file) != NULL) {
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/* Strip off line ending. */
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p = strpbrk(line, "\r\n");
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if (p == NULL)
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break; /* last line has no line ending */
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*p = '\0';
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/* {Topic title}:{filename of help file} */
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p = strchr(line, ':');
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if (p != NULL) {
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*p++ = '\0';
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filename = p;
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/*
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* "line" refers to the topic now, and "filename" refers to the
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* file name.
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*/
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topic_vb = help_page(line, filename);
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label = gtk_label_new(line);
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gtk_notebook_append_page(GTK_NOTEBOOK(help_nb), topic_vb, label);
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}
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}
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if(ferror(help_toc_file)) {
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simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Error reading file \"%s\": %s",
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help_toc_file_path, strerror(errno));
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}
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fclose(help_toc_file);
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gtk_widget_show(help_nb);
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/* Buttons (only "Ok" for now) */
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bbox = dlg_button_row_new(GTK_STOCK_OK, NULL);
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gtk_box_pack_end(GTK_BOX(main_vb), bbox, FALSE, FALSE, 5);
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gtk_widget_show(bbox);
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close_bt = OBJECT_GET_DATA(bbox, GTK_STOCK_OK);
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SIGNAL_CONNECT(close_bt, "clicked", help_close_cb, help_w);
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gtk_widget_grab_default(close_bt);
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gtk_quit_add_destroy(gtk_main_level(), GTK_OBJECT(help_w));
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/* Catch the "key_press_event" signal in the window, so that we can catch
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the ESC key being pressed and act as if the "Cancel" button had
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been selected. */
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dlg_set_cancel(help_w, close_bt);
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gtk_widget_show(help_w);
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} /* help_cb */
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/*
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* Open the help dialog and show a specific help page.
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*/
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void help_topic_cb(GtkWidget *w _U_, gpointer data _U_) {
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gchar *topic = data;
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gchar *page_topic;
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GtkWidget *help_nb;
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GSList *help_page_ent;
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gint page_num = 0;
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help_page_t *page;
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/* show help dialog, if not already opened */
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help_cb(NULL, NULL);
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help_nb = OBJECT_GET_DATA(help_w, NOTEBOOK_KEY);
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/* find page to display */
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for (help_page_ent = help_text_pages; help_page_ent != NULL;
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help_page_ent = g_slist_next(help_page_ent))
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{
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page = (help_page_t *)help_page_ent->data;
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page_topic = page->topic;
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if (strcmp (page_topic, topic) == 0) {
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/* topic page found, switch to notebook page */
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gtk_notebook_set_page(GTK_NOTEBOOK(help_nb), page_num);
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return;
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}
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page_num++;
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}
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/* topic page not found, default (first page) will be shown */
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}
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/*
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* Close help dialog.
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*/
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static void help_close_cb(GtkWidget *w _U_, gpointer data)
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{
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gtk_widget_destroy(GTK_WIDGET(data));
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}
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/*
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* Help dialog is closed now.
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*/
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static void help_destroy_cb(GtkWidget *w _U_, gpointer data _U_)
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{
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GSList *help_page_ent;
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help_page_t *page;
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/* Free up the list of help pages. */
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for (help_page_ent = help_text_pages; help_page_ent != NULL;
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help_page_ent = g_slist_next(help_page_ent)) {
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page = (help_page_t *)help_page_ent->data;
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g_free(page->topic);
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g_free(page->pathname);
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g_free(page);
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}
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g_slist_free(help_text_pages);
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help_text_pages = NULL;
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/* Note that we no longer have a Help window. */
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help_w = NULL;
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}
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/*
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* Insert some text to a help page.
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*/
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static void insert_text(GtkWidget *w, const char *buffer, int nchars)
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{
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#if GTK_MAJOR_VERSION < 2
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gtk_text_insert(GTK_TEXT(w), m_r_font, NULL, NULL, buffer, nchars);
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#else
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GtkTextBuffer *buf= gtk_text_view_get_buffer(GTK_TEXT_VIEW(w));
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GtkTextIter iter;
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gtk_text_buffer_get_end_iter(buf, &iter);
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gtk_widget_modify_font(w, m_r_font);
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if (!g_utf8_validate(buffer, -1, NULL))
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printf("Invalid utf8 encoding: %s\n", buffer);
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gtk_text_buffer_insert(buf, &iter, buffer, nchars);
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#endif
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}
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/*
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* Put the complete help text into a help page.
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*/
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static void set_help_text(GtkWidget *w, const char *help_file_path)
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{
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FILE *help_file;
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char line[4096+1]; /* XXX - size? */
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#if GTK_MAJOR_VERSION < 2
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gtk_text_freeze(GTK_TEXT(w));
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#endif
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help_file = fopen(help_file_path, "r");
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if (help_file != NULL) {
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while (fgets(line, sizeof line, help_file) != NULL) {
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insert_text(w, line, strlen(line));
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}
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if(ferror(help_file)) {
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simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Error reading file \"%s\": %s",
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help_file_path, strerror(errno));
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}
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fclose(help_file);
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} else {
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simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Could not open file \"%s\": %s",
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help_file_path, strerror(errno));
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}
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#if GTK_MAJOR_VERSION < 2
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gtk_text_thaw(GTK_TEXT(w));
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#endif
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} /* set_help_text */
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/*
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* Clear the help text from the help page.
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*/
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static void clear_help_text(GtkWidget *w)
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{
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#if GTK_MAJOR_VERSION < 2
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GtkText *txt = GTK_TEXT(w);
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gtk_text_set_point(txt, 0);
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/* Keep GTK+ 1.2.3 through 1.2.6 from dumping core - see
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http://www.ethereal.com/lists/ethereal-dev/199912/msg00312.html and
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http://www.gnome.org/mailing-lists/archives/gtk-devel-list/1999-October/0051.shtml
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for more information */
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gtk_adjustment_set_value(txt->vadj, 0.0);
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gtk_text_forward_delete(txt, gtk_text_get_length(txt));
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#else
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GtkTextBuffer *buf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(w));
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gtk_text_buffer_set_text(buf, "", 0);
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#endif
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}
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/*
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* Redraw a single help page.
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*/
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void help_redraw_page(const help_page_t *page)
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{
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#if GTK_MAJOR_VERSION < 2
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gtk_text_freeze(GTK_TEXT(page->txt));
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#endif
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clear_help_text(page->txt);
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set_help_text(page->txt, page->pathname);
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#if GTK_MAJOR_VERSION < 2
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gtk_text_thaw(GTK_TEXT(page->txt));
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#endif
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}
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/*
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* Redraw all help pages, to use a new font.
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*/
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void help_redraw(void)
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{
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GSList *help_page_ent;
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if (help_w != NULL) {
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for (help_page_ent = help_text_pages; help_page_ent != NULL;
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help_page_ent = g_slist_next(help_page_ent))
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help_redraw_page((help_page_t *)help_page_ent->data);
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}
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}
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