ui/gtk/text_page_utils.c

   1 /* text_page_utils.c
   2  *  Construct a simple text page widget from a file.
   3  *
   4  * $Id$
   5  *
   6  * Ulf Lamping
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 2000 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "config.h"
  28 #include <string.h>
  29 #include <stdio.h>
  30 #include <errno.h>
  31
  32 #include <gtk/gtk.h>
  33
  34 #include "epan/filesystem.h"
  35
  36 #include "ui/simple_dialog.h"
  37 #include <wsutil/file_util.h>
  38
  39 #include "ui/gtk/text_page_utils.h"
  40 #include "ui/gtk/gui_utils.h"
  41 #include "ui/gtk/font_utils.h"
  42
  43
  44 #define TEXT_KEY        "txt_key"
  45
  46 static void text_page_insert(GtkWidget *page, const char *buffer, int nchars);
  47 static void text_page_set_text(GtkWidget *page, const char *absolute_path);
  48
  49
  50 /*
  51  * Construct a simple text page widget from a file.
  52  */
  53 GtkWidget * text_page_new(const char *absolute_path)
  54 {
  55   GtkWidget *page_vb, *txt_scrollw, *txt;
  56
  57   page_vb =ws_gtk_box_new(GTK_ORIENTATION_VERTICAL, 0, FALSE);
  58   gtk_container_set_border_width(GTK_CONTAINER(page_vb), 1);
  59   txt_scrollw = scrolled_window_new(NULL, NULL);
  60     gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(txt_scrollw),
  61                                    GTK_SHADOW_IN);
  62   gtk_box_pack_start(GTK_BOX(page_vb), txt_scrollw, TRUE, TRUE, 0);
  63
  64   gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(txt_scrollw),
  65                                  GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
  66   txt = gtk_text_view_new();
  67   gtk_text_view_set_editable(GTK_TEXT_VIEW(txt), FALSE);
  68   gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(txt), GTK_WRAP_WORD);
  69   gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(txt), FALSE);
  70   /* XXX: there seems to be no way to add a small border *around* the whole text,
  71    * so the text will be "bump" against the edges.
  72    * the following is only working for left and right edges,
  73    * there is no such thing for top and bottom :-( */
  74   /* gtk_text_view_set_left_margin(GTK_TEXT_VIEW(txt), 3); */
  75   /* gtk_text_view_set_right_margin(GTK_TEXT_VIEW(txt), 3); */
  76
  77   g_object_set_data(G_OBJECT(page_vb), TEXT_KEY, txt);
  78
  79   text_page_set_text(page_vb, absolute_path);
  80   gtk_container_add(GTK_CONTAINER(txt_scrollw), txt);
  81   gtk_widget_show(txt_scrollw);
  82   gtk_widget_show(txt);
  83
  84   return page_vb;
  85 }
  86
  87
  88 /*
  89  * Insert some text to a text page.
  90  */
  91 static void text_page_insert(GtkWidget *page, const char *buffer, int nchars)
  92 {
  93     GtkWidget *txt = (GtkWidget *)g_object_get_data(G_OBJECT(page), TEXT_KEY);
  94
  95     GtkTextBuffer *buf= gtk_text_view_get_buffer(GTK_TEXT_VIEW(txt));
  96     GtkTextIter    iter;
  97
  98     gtk_text_buffer_get_end_iter(buf, &iter);
  99 #if GTK_CHECK_VERSION(3,0,0)
 100     gtk_widget_override_font(GTK_WIDGET(txt), user_font_get_regular());
 101 #else
 102     gtk_widget_modify_font(GTK_WIDGET(txt), user_font_get_regular());
 103 #endif
 104     if (!g_utf8_validate(buffer, -1, NULL))
 105         printf("Invalid utf8 encoding: %s\n", buffer);
 106     gtk_text_buffer_insert(buf, &iter, buffer, nchars);
 107 }
 108
 109
 110 /*
 111  * Put the complete text file into a text page.
 112  */
 113 static void text_page_set_text(GtkWidget *page, const char *absolute_path)
 114 {
 115   FILE *text_file;
 116   char line[4096+1];    /* XXX - size? */
 117
 118   text_file = ws_fopen(absolute_path, "r");
 119   if (text_file != NULL) {
 120     while (fgets(line, sizeof line, text_file) != NULL) {
 121       text_page_insert(page, line, (int) strlen(line));
 122     }
 123     if(ferror(text_file)) {
 124       simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Error reading file \"%s\": %s",
 125                     absolute_path, g_strerror(errno));
 126     }
 127     fclose(text_file);
 128   } else {
 129       simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Could not open file \"%s\": %s",
 130                     absolute_path, g_strerror(errno));
 131   }
 132 }
 133
 134
 135 /**
 136  * Clear the text from the text page.
 137  */
 138 static void text_page_clear(GtkWidget *page)
 139 {
 140   GtkTextBuffer *buf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(g_object_get_data(G_OBJECT(page), TEXT_KEY)));
 141
 142   gtk_text_buffer_set_text(buf, "", 0);
 143 }
 144
 145
 146 /**
 147  * Redraw a single text page, e.g. to use a new font.
 148  */
 149 void text_page_redraw(GtkWidget *page, const char *absolute_path)
 150 {
 151   text_page_clear(page);
 152   text_page_set_text(page, absolute_path);
 153 }