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 void lh_show_mimepart(MimeViewer *_viewer, const gchar *infile,
  47                 MimeInfo *partinfo)
  48 {
  49         debug_print("LH: show_mimepart\n");
  50         LHViewer *viewer = (LHViewer *)_viewer;
  51         gchar *string = procmime_get_part_as_string(partinfo, TRUE);
  52         gchar *utf8 = NULL;
  53         const gchar *charset;
  54
  55         if (string == NULL) {
  56                 g_warning("LH: couldn't get MIME part file");
  57                 return;
  58         }
  59
  60         charset = procmime_mimeinfo_get_parameter(partinfo, "charset");
  61         if (charset != NULL && g_ascii_strcasecmp("utf-8", charset) != 0) {
  62                 gsize length;
  63                 GError *error = NULL;
  64                 debug_print("LH: converting mimepart to UTF-8 from %s\n", charset);
  65                 utf8 = g_convert(string, -1, "utf-8", charset, NULL, &length, &error);
  66                 if (error) {
  67                         g_warning("LH: failed mimepart conversion to UTF-8: %s", error->message);
  68                         g_free(string);
  69                         g_error_free(error);
  70                         return;
  71                 }
  72                 debug_print("LH: successfully converted %" G_GSIZE_FORMAT " bytes\n", length);
  73         } else {
  74                 utf8 = string;
  75         }
  76
  77         lh_widget_set_partinfo(viewer->widget, partinfo);
  78         lh_widget_open_html(viewer->widget, utf8);
  79         g_free(utf8);
  80 }
  81
  82 static void lh_clear_viewer(MimeViewer *_viewer)
  83 {
  84         debug_print("LH: clear_viewer\n");
  85         LHViewer *viewer = (LHViewer *)_viewer;
  86         lh_widget_clear(viewer->widget);
  87 }
  88
  89 static void lh_destroy_viewer(MimeViewer *_viewer)
  90 {
  91         LHViewer *viewer = (LHViewer *)_viewer;
  92
  93         debug_print("LH: destroy_viewer\n");
  94         g_free(viewer);
  95 }
  96
  97 /*
  98 static void lh_print_viewer (MimeViewer *_viewer)
  99 {
 100     debug_print("LH: print_viewer\n");
 101
 102     LHViewer* viewer = (LHViewer *) _viewer;
 103     lh_widget_print(viewer->widget);
 104 }
 105 */
 106
 107
 108 static gboolean lh_scroll_page(MimeViewer *_viewer, gboolean up)
 109 {
 110         LHViewer *viewer = (LHViewer *)_viewer;
 111         GtkAdjustment *vadj = NULL;
 112
 113         if (!viewer || (viewer->widget == NULL))
 114                 return FALSE;
 115
 116         vadj = gtk_scrolled_window_get_vadjustment(
 117                                 GTK_SCROLLED_WINDOW(lh_widget_get_widget(viewer->widget)));
 118         return gtkutils_scroll_page(lh_widget_get_widget(viewer->widget), vadj, up);
 119 }
 120
 121 static void lh_scroll_one_line(MimeViewer *_viewer, gboolean up)
 122 {
 123         LHViewer *viewer = (LHViewer *)_viewer;
 124         GtkAdjustment *vadj = NULL;
 125
 126         if (!viewer || (viewer->widget == NULL))
 127                 return;
 128
 129         vadj = gtk_scrolled_window_get_vadjustment(
 130                                         GTK_SCROLLED_WINDOW(lh_widget_get_widget(viewer->widget)));
 131         gtkutils_scroll_one_line(lh_widget_get_widget(viewer->widget), vadj, up);
 132 }
 133
 134 /***************************************************************/
 135 MimeViewer *lh_viewer_create()
 136 {
 137         debug_print("LH: viewer_create\n");
 138
 139         LHViewer *viewer = g_new0(LHViewer, 1);
 140         viewer->mimeviewer.factory = &lh_viewer_factory;
 141         viewer->widget = lh_widget_new();
 142
 143         viewer->mimeviewer.get_widget = lh_get_widget;
 144         viewer->mimeviewer.show_mimepart = lh_show_mimepart;
 145
 146         viewer->mimeviewer.clear_viewer = lh_clear_viewer;
 147         viewer->mimeviewer.destroy_viewer = lh_destroy_viewer;
 148
 149         viewer->mimeviewer.scroll_page = lh_scroll_page;
 150         viewer->mimeviewer.scroll_one_line = lh_scroll_one_line;
 151
 152         viewer->vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
 153         gtk_widget_set_name(GTK_WIDGET(viewer->vbox), "litehtml_viewer");
 154
 155         GtkWidget *w = lh_widget_get_widget(viewer->widget);
 156         gtk_box_pack_start(GTK_BOX(viewer->vbox), w,
 157                         TRUE, TRUE, 1);
 158
 159         gtk_widget_show_all(viewer->vbox);
 160
 161         return (MimeViewer *)viewer;
 162 }
 163
 164 void lh_widget_statusbar_push(const gchar* msg)
 165 {
 166         MainWindow *mainwin = mainwindow_get_mainwindow();
 167         STATUSBAR_PUSH(mainwin, msg);
 168 }
 169
 170 void lh_widget_statusbar_pop()
 171 {
 172         MainWindow *mainwin = mainwindow_get_mainwindow();
 173         STATUSBAR_POP(mainwin);
 174 }