src/plugins/litehtml_viewer/lh_viewer.c

   1 /*
   2  * Claws Mail -- A GTK+ based, lightweight, and fast e-mail client
   3  * Copyright(C) 2019 the Claws Mail Team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License for more details.
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write tothe Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #include "claws-features.h"
  21 #endif
  22
  23 #include <codeconv.h>
  24 #include "common/utils.h"
  25 #include "mainwindow.h"
  26 #include "statusbar.h"
  27 #include "lh_viewer.h"
  28
  29 static gchar *content_types[] = { "text/html", NULL };
  30
  31 MimeViewer *lh_viewer_create();
  32
  33 MimeViewerFactory lh_viewer_factory = {
  34         content_types,
  35         0,
  36         lh_viewer_create
  37 };
  38
  39 static GtkWidget *lh_get_widget(MimeViewer *_viewer)
  40 {
  41         debug_print("LH: get_widget\n");
  42         LHViewer *viewer = (LHViewer *)_viewer;
  43         return viewer->vbox;
  44 }
  45
  46 static gchar *get_utf8_string(const gchar *string) {
  47         gchar *utf8 = NULL;
  48         gsize length;
  49         GError *error = NULL;
  50         gchar *locale = NULL;
  51
  52         if (!g_utf8_validate(string, -1, NULL)) {
  53                 const gchar *cur_locale = conv_get_current_locale();
  54                 gchar* split = g_strstr_len(cur_locale, -1, ".");
  55                 if (split) {
  56                     locale = ++split;
  57                 } else {
  58                     locale = (gchar *) cur_locale;
  59                 }
  60                 debug_print("Try converting to UTF-8 from %s\n", locale);
  61                 if (g_ascii_strcasecmp("utf-8", locale) != 0) {
  62                     utf8 = g_convert(string, -1, "utf-8", locale, NULL, &length, &error);
  63                     if (error) {
  64                             debug_print("Failed convertion to current locale: %s\n", error->message);
  65                             g_clear_error(&error);
  66                         }
  67             }
  68             if (!utf8) {
  69                 debug_print("Use iso-8859-1 as last resort\n");
  70                         utf8 = g_convert(string, -1, "utf-8", "iso-8859-1", NULL, &length, &error);
  71                         if (error) {
  72                                 debug_print("Charset detection failed. Use text as is\n");
  73                                 utf8 = g_strdup(string);
  74                                 g_clear_error(&error);
  75                         }
  76                 }
  77         } else {
  78                 utf8 = g_strdup(string);
  79         }
  80
  81         return utf8;
  82 }
  83
  84 static void lh_show_mimepart(MimeViewer *_viewer, const gchar *infile,
  85                 MimeInfo *partinfo)
  86 {
  87         debug_print("LH: show_mimepart\n");
  88         LHViewer *viewer = (LHViewer *)_viewer;
  89         gchar *string = procmime_get_part_as_string(partinfo, TRUE);
  90         gchar *utf8 = NULL;
  91         const gchar *charset;
  92
  93         if (string == NULL) {
  94                 g_warning("LH: couldn't get MIME part file\n");
  95                 return;
  96         }
  97
  98         charset = procmime_mimeinfo_get_parameter(partinfo, "charset");
  99         if (charset != NULL && g_ascii_strcasecmp("utf-8", charset) != 0) {
 100                 gsize length;
 101                 GError *error = NULL;
 102                 debug_print("LH: converting mimepart to UTF-8 from %s\n", charset);
 103                 utf8 = g_convert(string, -1, "utf-8", charset, NULL, &length, &error);
 104                 if (error) {
 105                         g_warning("LH: failed mimepart conversion to UTF-8: %s", error->message);
 106                         g_free(string);
 107                         g_error_free(error);
 108                         return;
 109                 }
 110                 debug_print("LH: successfully converted %" G_GSIZE_FORMAT " bytes\n", length);
 111         } else {
 112                 utf8 = string;
 113         }
 114
 115         lh_widget_set_partinfo(viewer->widget, partinfo);
 116         lh_widget_open_html(viewer->widget, utf8);
 117         g_free(utf8);
 118 }
 119
 120 static void lh_clear_viewer(MimeViewer *_viewer)
 121 {
 122         debug_print("LH: clear_viewer\n");
 123         LHViewer *viewer = (LHViewer *)_viewer;
 124         lh_widget_clear(viewer->widget);
 125 }
 126
 127 static void lh_destroy_viewer(MimeViewer *_viewer)
 128 {
 129         LHViewer *viewer = (LHViewer *)_viewer;
 130
 131         debug_print("LH: destroy_viewer\n");
 132         g_free(viewer);
 133 }
 134
 135 static void lh_print_viewer (MimeViewer *_viewer)
 136 {
 137     debug_print("LH: print_viewer\n");
 138
 139     LHViewer* viewer = (LHViewer *) _viewer;
 140     lh_widget_print(viewer->widget);
 141 }
 142
 143 /***************************************************************/
 144 MimeViewer *lh_viewer_create()
 145 {
 146         debug_print("LH: viewer_create\n");
 147
 148         LHViewer *viewer = g_new0(LHViewer, 1);
 149         viewer->mimeviewer.factory = &lh_viewer_factory;
 150         viewer->widget = lh_widget_new();
 151
 152         viewer->mimeviewer.get_widget = lh_get_widget;
 153         viewer->mimeviewer.show_mimepart = lh_show_mimepart;
 154
 155         viewer->mimeviewer.clear_viewer = lh_clear_viewer;
 156         viewer->mimeviewer.destroy_viewer = lh_destroy_viewer;
 157
 158         viewer->mimeviewer.print = lh_print_viewer;
 159
 160         viewer->vbox = gtk_vbox_new(FALSE, 0);
 161
 162         GtkWidget *w = lh_widget_get_widget(viewer->widget);
 163         gtk_box_pack_start(GTK_BOX(viewer->vbox), w,
 164                         TRUE, TRUE, 1);
 165
 166         gtk_widget_show_all(viewer->vbox);
 167
 168         return (MimeViewer *)viewer;
 169 }
 170
 171 void lh_widget_statusbar_push(const gchar* msg)
 172 {
 173         MainWindow *mainwin = mainwindow_get_mainwindow();
 174         STATUSBAR_PUSH(mainwin, msg);
 175 }
 176
 177 void lh_widget_statusbar_pop()
 178 {
 179         MainWindow *mainwin = mainwindow_get_mainwindow();
 180         STATUSBAR_POP(mainwin);
 181 }