* added licensing boilerplate to source files
[modest] / src / modest-tny-msg-view.c
index 409a73b..68e8ef5 100644 (file)
-/* modest-tny-msg-view.c */
+/* Copyright (c) 2006, Nokia Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * * Neither the name of the Nokia Corporation nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
 
-/* insert (c)/licensing information) */
+/* modest-tny-msg-view.c */
 
 #include "modest-tny-msg-view.h"
-/* include other impl specific header files */
+#include "modest-tny-stream-gtkhtml.h"
+#include "modest-tny-msg-actions.h"
+
+#include <tny-text-buffer-stream.h>
+#include <string.h>
+#include <regex.h>
+#include <ctype.h>
+#include <glib/gi18n.h>
+#include <gtkhtml/gtkhtml.h>
+#include <gtkhtml/gtkhtml-stream.h>
 
 /* 'private'/'protected' functions */
-static void                     modest_tny_msg_view_class_init   (ModestTnyMsgViewClass *klass);
-static void                     modest_tny_msg_view_init         (ModestTnyMsgView *obj);
-static void                     modest_tny_msg_view_finalize     (GObject *obj);
+static void     modest_tny_msg_view_class_init   (ModestTnyMsgViewClass *klass);
+static void     modest_tny_msg_view_init         (ModestTnyMsgView *obj);
+static void     modest_tny_msg_view_finalize     (GObject *obj);
+
+
+static GSList*  get_url_matches (GString *txt);
+static gboolean fill_gtkhtml_with_txt (ModestTnyMsgView *self, GtkHTML* gtkhtml, const gchar* txt, TnyMsgIface *msg);
+
+static gboolean on_link_clicked (GtkWidget *widget, const gchar *uri,
+                                ModestTnyMsgView *msg_view);
+static gboolean on_url_requested (GtkWidget *widget, const gchar *uri,
+                                 GtkHTMLStream *stream,
+                                 ModestTnyMsgView *msg_view);
+static gchar *construct_virtual_filename(const gchar *filename, const gint position, const gchar *id, const gboolean active);
+static gchar *construct_virtual_filename_from_mime_part(TnyMsgMimePartIface *msg, const gint position);
+
+#define ATTACHMENT_ID_INLINE "attachment-inline"
+#define ATTACHMENT_ID_LINK "attachment-link"
+#define PREFIX_LINK_EMAIL "mailto:"
+
+gint virtual_filename_get_pos(const gchar *filename);
+/*
+ * we need these regexps to find URLs in plain text e-mails
+ */
+typedef struct _UrlMatchPattern UrlMatchPattern;
+struct _UrlMatchPattern {
+       gchar   *regex;
+       regex_t *preg;
+       gchar   *prefix;
+       
+};
+#define MAIL_VIEWER_URL_MATCH_PATTERNS  {\
+       { "(file|http|ftp|https)://[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]+[-A-Za-z0-9_$%&=?/~#]",\
+         NULL, NULL },\
+       { "www\\.[-a-z0-9.]+[-a-z0-9](:[0-9]*)?(/[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]*[^]}\\),?!;:\"]?)?",\
+         NULL, "http://" },\
+       { "ftp\\.[-a-z0-9.]+[-a-z0-9](:[0-9]*)?(/[-A-Za-z0-9_$.+!*(),;:@%&=?/~#]*[^]}\\),?!;:\"]?)?",\
+         NULL, "ftp://" },\
+       { "(voipto|callto|chatto|jabberto|xmpp):[-_a-z@0-9.\\+]+", \
+          NULL, NULL},                                             \
+       { "mailto:[-_a-z0-9.\\+]+@[-_a-z0-9.]+",                    \
+         NULL, NULL},\
+       { "[-_a-z0-9.\\+]+@[-_a-z0-9.]+",\
+         NULL, "mailto:"}\
+       }
+
 
 /* list my signals */
 enum {
-       /* MY_SIGNAL_1, */
+       MAILTO_CLICKED_SIGNAL,
        /* MY_SIGNAL_2, */
        LAST_SIGNAL
 };
 
 typedef struct _ModestTnyMsgViewPrivate ModestTnyMsgViewPrivate;
 struct _ModestTnyMsgViewPrivate {
-       GtkWidget *text_view;
+       GtkWidget *gtkhtml;
+       TnyMsgIface *msg;
+       gboolean show_attachments_inline;
 };
 #define MODEST_TNY_MSG_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
                                                  MODEST_TYPE_TNY_MSG_VIEW, \
@@ -28,7 +110,7 @@ struct _ModestTnyMsgViewPrivate {
 static GtkContainerClass *parent_class = NULL;
 
 /* uncomment the following if you have defined any signals */
-/* static guint signals[LAST_SIGNAL] = {0}; */
+static guint signals[LAST_SIGNAL] = {0};
 
 GType
 modest_tny_msg_view_get_type (void)
@@ -63,93 +145,731 @@ modest_tny_msg_view_class_init (ModestTnyMsgViewClass *klass)
        gobject_class->finalize = modest_tny_msg_view_finalize;
 
        g_type_class_add_private (gobject_class, sizeof(ModestTnyMsgViewPrivate));
-
-       /* signal definitions go here, e.g.: */
-/*     signals[MY_SIGNAL_1] = */
-/*             g_signal_new ("my_signal_1",....); */
-/*     signals[MY_SIGNAL_2] = */
-/*             g_signal_new ("my_signal_2",....); */
-/*     etc. */
+       
+       signals[MAILTO_CLICKED_SIGNAL] =
+               g_signal_new ("on_mailto_clicked",
+                             G_TYPE_FROM_CLASS (gobject_class),
+                             G_SIGNAL_RUN_FIRST,
+                             G_STRUCT_OFFSET(ModestTnyMsgViewClass, mailto_clicked),
+                             NULL, NULL,
+                             g_cclosure_marshal_VOID__STRING,
+                             G_TYPE_NONE, 1, G_TYPE_STRING/*, 1, G_TYPE_POINTER*/);
 }
 
 static void
 modest_tny_msg_view_init (ModestTnyMsgView *obj)
 {
        ModestTnyMsgViewPrivate *priv;
-
+       
        priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(obj);
 
-       priv->text_view = NULL;
+       priv->msg = NULL;
+       
+       priv->gtkhtml = gtk_html_new();
+       
+       priv->show_attachments_inline = FALSE;
+
+       gtk_html_set_editable        (GTK_HTML(priv->gtkhtml), FALSE);
+       gtk_html_allow_selection     (GTK_HTML(priv->gtkhtml), TRUE);
+       gtk_html_set_caret_mode      (GTK_HTML(priv->gtkhtml), FALSE);
+       gtk_html_set_blocking        (GTK_HTML(priv->gtkhtml), FALSE);
+       gtk_html_set_images_blocking (GTK_HTML(priv->gtkhtml), FALSE);
+
+       g_signal_connect (G_OBJECT(priv->gtkhtml), "link_clicked",
+                         G_CALLBACK(on_link_clicked), obj);
+       
+       g_signal_connect (G_OBJECT(priv->gtkhtml), "url_requested",
+                         G_CALLBACK(on_url_requested), obj);
 }
+       
 
 static void
 modest_tny_msg_view_finalize (GObject *obj)
-{
-       /* no need to unref the text_view */    
+{      
+       /* TODO! */
 }
 
 GtkWidget*
-modest_tny_msg_view_new (TnyMsgIface *msg)
+modest_tny_msg_view_new (TnyMsgIface *msg, const gboolean show_attachments_inline)
 {
        GObject *obj;
        ModestTnyMsgView* self;
        ModestTnyMsgViewPrivate *priv;
-
+       
        obj  = G_OBJECT(g_object_new(MODEST_TYPE_TNY_MSG_VIEW, NULL));
        self = MODEST_TNY_MSG_VIEW(obj);
-       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (self);
 
-       gtk_scrolled_window_set_policy(self, GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
-       
-       priv->text_view = gtk_text_view_new ();
-       gtk_text_view_set_editable       (GTK_TEXT_VIEW(priv->text_view), FALSE);
-       gtk_text_view_set_cursor_visible (GTK_TEXT_VIEW(priv->text_view), FALSE);
+       gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(self),
+                                      GTK_POLICY_AUTOMATIC,
+                                      GTK_POLICY_AUTOMATIC);
 
-       gtk_container_add (GTK_CONTAINER(self), priv->text_view);
+       if (priv->gtkhtml) 
+               gtk_container_add (GTK_CONTAINER(obj), priv->gtkhtml);
        
        if (msg)
                modest_tny_msg_view_set_message (self, msg);
+       
+       modest_tny_msg_view_set_show_attachments_inline_flag(self, show_attachments_inline);
 
        return GTK_WIDGET(self);
 }
 
 
+static gboolean
+on_link_clicked (GtkWidget *widget, const gchar *uri,
+                                ModestTnyMsgView *msg_view)
+{
+       if (g_str_has_prefix(uri, PREFIX_LINK_EMAIL)) {
+               gchar *s, *p;
+               /* skip over "mailto:" */
+               s = g_strdup(uri + strlen(PREFIX_LINK_EMAIL));
+               /* strip ?subject=... and the like */
+               for (p = s; p[0]; p++)
+                       if (p[0] == '?') {
+                               p[0] = 0;
+                               break;
+                       }
+               g_signal_emit(msg_view, signals[MAILTO_CLICKED_SIGNAL], 0, s);
+               g_free(s);
+               return TRUE;
+       } else if (g_str_has_prefix(uri, ATTACHMENT_ID_LINK)) {
+               /* save or open attachment */
+               g_message ("link-to-save: %s", uri); /* FIXME */
+               return TRUE;
+       }
+       g_message ("link clicked: %s", uri); /* FIXME */
+       return FALSE;
+       
+}
 
-void
-modest_tny_msg_view_set_message (ModestTnyMsgView *self, TnyMsgIface *msg)
+
+static TnyMsgMimePartIface *
+find_cid_image (TnyMsgIface *msg, const gchar *cid)
 {
-       ModestTnyMsgViewPrivate *priv;
-       GtkTextBuffer *buf;
+       TnyMsgMimePartIface *part = NULL;
        GList *parts;
-       TnyStreamIface *stream;
+
+       g_return_val_if_fail (msg, NULL);
+       g_return_val_if_fail (cid, NULL);
        
-       g_return_if_fail (self);
+       parts  = (GList*) tny_msg_iface_get_parts (msg);
+       while (parts && !part) {
+               const gchar *part_cid;
+               part = TNY_MSG_MIME_PART_IFACE(parts->data);
+               part_cid = tny_msg_mime_part_iface_get_content_id (part);
+               printf("CMP:%s:%s\n", cid, part_cid);
+               if (part_cid && strcmp (cid, part_cid) == 0)
+                       return part; /* we found it! */
+               
+               part = NULL;
+               parts = parts->next;
+       }
+       
+       return part;
+}
 
-       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
-       buf = gtk_text_view_get_buffer (GTK_TEXT_VIEW(priv->text_view));
 
-       /* clear the message view */
-       gtk_text_buffer_set_text (buf, "", 0);
+static TnyMsgMimePartIface *
+find_attachment_by_filename (TnyMsgIface *msg, const gchar *fn)
+{
+       TnyMsgMimePartIface *part = NULL;
+       GList *parts;
+       gchar *dummy;
+       gint pos;
 
-       /* if msg is NULL, do nothing else */
-       if (!msg) {
-               return;
-       }
+       g_return_val_if_fail (msg, NULL);
+       g_return_val_if_fail (fn, NULL);
        
-       /* otherwise... find the body part */
-       stream = TNY_STREAM_IFACE(tny_text_buffer_stream_new(buf));
        parts  = (GList*) tny_msg_iface_get_parts (msg);
-       while (parts) {
-               TnyMsgMimePartIface *part =
-                       TNY_MSG_MIME_PART_IFACE(parts->data);
+       pos = virtual_filename_get_pos(fn);
+       
+       if ((pos < 0) || (pos >= g_list_length(parts)))
+               return NULL;
+       
+       part = g_list_nth_data(parts, pos);
+       
+       dummy = construct_virtual_filename_from_mime_part(part, pos);
+       if (strcmp(dummy, fn) == 0) {
+               g_free(dummy);
+               return part;
+       } else {
+               g_free(dummy);
+               return NULL;
+       }
+}
+
+
+static gboolean
+on_url_requested (GtkWidget *widget, const gchar *uri,
+                 GtkHTMLStream *stream,
+                 ModestTnyMsgView *msg_view)
+{
+       
+       ModestTnyMsgViewPrivate *priv;
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (msg_view);
+
+       g_message ("url requested: %s", uri);
+       
+       if (!modest_tny_msg_view_get_show_attachments_inline_flag(msg_view))
+               return TRUE; /* debatable */
+       
+       if (g_str_has_prefix (uri, "cid:")) {
+               /* +4 ==> skip "cid:" */
                
-               if (tny_msg_mime_part_iface_content_type_is (part, "text/plain")) {
-                       tny_stream_iface_reset (stream);
-                       tny_msg_mime_part_iface_write_to_stream (part, stream);
-                       tny_stream_iface_reset (stream);
+               TnyMsgMimePartIface *part = find_cid_image (priv->msg, uri + 4);
+               if (!part) {
+                       g_message ("%s not found", uri + 4);
+                       gtk_html_stream_close (stream, GTK_HTML_STREAM_ERROR);
+               } else {
+                       TnyStreamIface *tny_stream =
+                               TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new(stream));
+                       tny_msg_mime_part_iface_decode_to_stream (part,tny_stream);
+                       gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
+               }
+       } else if (g_str_has_prefix (uri, ATTACHMENT_ID_INLINE)) {
+               TnyMsgMimePartIface *part;
+               part = find_attachment_by_filename (priv->msg, uri);
+               if (!part) {
+                       g_message ("%s not found", uri);
+                       gtk_html_stream_close (stream, GTK_HTML_STREAM_ERROR);
+               } else {
+                       TnyStreamIface *tny_stream =
+                               TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new(stream));
+                       tny_msg_mime_part_iface_decode_to_stream (part,tny_stream);
+                       gtk_html_stream_close (stream, GTK_HTML_STREAM_OK);
+               }
+       }
+       return TRUE;
+}
+
+
+typedef struct  {
+       guint offset;
+       guint len;
+       const gchar* prefix;
+} url_match_t;
+
+
+static gchar *
+secure_filename(const gchar *fn)
+{
+       gchar *tmp, *p;
+       GString *s;
+       
+       s = g_string_new("");
+#if 1 || DEBUG
+       tmp = g_strdup(fn);
+       for (p = tmp; p[0] ; p++ ) {
+               p[0] &= 0x5f; /* 01011111 */
+               p[0] |= 0x40; /* 01000000 */
+       }
+       g_string_printf(s, "0x%x:%s", g_str_hash(fn), tmp);
+       g_free(tmp);
+       return g_string_free(s, FALSE);
+#else
+       g_string_printf(s, "0x%x", g_str_hash(fn));
+       return g_string_free(s, FALSE);
+#endif
+}
+       
+       
+static gchar *
+construct_virtual_filename(const gchar *filename,
+                           const gint position,
+                           const gchar *id,
+                           const gboolean active)
+{
+       GString *s;
+       gchar *fn;
+       
+       if (position < 0)
+               return g_strdup("AttachmentInvalid");
+
+       s = g_string_new("");
+       if (active)
+               g_string_append(s, ATTACHMENT_ID_INLINE);
+       else
+               g_string_append(s, ATTACHMENT_ID_LINK);
+       g_string_append_printf(s, ":%d:", position);
+       if (id)
+               g_string_append(s, id);
+       g_string_append_c(s, ':');
+       
+       fn = secure_filename(filename);
+       if (fn)
+               g_string_append(s, fn);
+       g_free(fn);
+       g_string_append_c(s, ':');
+       return g_string_free(s, FALSE);
+}
+
+
+static gchar *
+construct_virtual_filename_from_mime_part(TnyMsgMimePartIface *msg, const gint position)
+{
+       const gchar *id, *filename;
+       const gboolean active = TRUE;
+       
+       filename = tny_msg_mime_part_iface_get_filename(
+                                                                       TNY_MSG_MIME_PART_IFACE(msg));
+       if (!filename)
+               filename = "[unknown]";
+       id = tny_msg_mime_part_iface_get_content_id(
+                                                                       TNY_MSG_MIME_PART_IFACE(msg));
+       
+       return construct_virtual_filename(filename, position, id, active);
+}
+
+const gchar *
+get_next_token(const gchar *s, gint *len)
+{
+       gchar *i1, *i2;
+       i1 = (char *) s;
+       i2 = (char *) s;
+       
+       while (i2[0]) {
+               if (i2[0] == ':')
                        break;
+               i2++;
+       }
+       if (!i2[0])
+               return NULL;
+       *len = i2 - i1;
+       return ++i2;
+}
+
+/* maybe I should use libregexp */
+gint
+virtual_filename_get_pos(const gchar *filename)
+{
+       const gchar *i1, *i2;
+       gint len, pos;
+       GString *dummy;
+       
+       /* check prefix */
+       if ((!g_str_has_prefix(filename, ATTACHMENT_ID_INLINE ":")) &&
+           (!g_str_has_prefix(filename, ATTACHMENT_ID_LINK ":")))
+               return -1;
+
+       i2 = filename;
+       i2 = get_next_token(i2, &len);
+       i1 = i2;
+               
+       /* get position */
+       i2 = get_next_token(i2, &len);
+       if (i2 == NULL)
+               return -1;
+       dummy = g_string_new_len(i1, len);
+       pos = atoi(dummy->str);
+       g_string_free(dummy, FALSE);
+       return pos;
+}      
+
+
+static gchar *
+attachments_as_html(ModestTnyMsgView *self, TnyMsgIface *msg)
+{
+       ModestTnyMsgViewPrivate *priv;
+       gboolean attachments_found = FALSE;
+       GString *appendix;
+       const GList *attachment_list, *attachment;
+       const gchar *content_type, *filename, *id;
+       gchar *virtual_filename;
+       
+       if (!msg)
+               return g_malloc0(1);
+       
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE (self);
+       
+       appendix = g_string_new("");
+       g_string_printf(appendix, "<HTML><BODY>\n<hr><h5>%s:</h5>\n", _("Attachments"));
+       
+       attachment_list = tny_msg_iface_get_parts(msg);
+       attachment = attachment_list;
+       while (attachment) {
+               filename = "";
+               content_type = tny_msg_mime_part_iface_get_content_type(
+                                                                               TNY_MSG_MIME_PART_IFACE(attachment->data));
+               if (!content_type)
+                       continue;
+
+               if ((strcmp("image/jpeg", content_type) == 0) ||
+                       (strcmp("image/gif",  content_type) == 0)) {
+                       filename = tny_msg_mime_part_iface_get_filename(
+                               TNY_MSG_MIME_PART_IFACE(attachment->data));
+                       if (!filename)
+                               filename = "[unknown]";
+                       else
+                               attachments_found = TRUE;
+                       id = tny_msg_mime_part_iface_get_content_id(
+                                                                               TNY_MSG_MIME_PART_IFACE(attachment->data));
+                       if (modest_tny_msg_view_get_show_attachments_inline_flag(self)) {
+                               virtual_filename = construct_virtual_filename(filename,
+                                       g_list_position((GList *)attachment_list, (GList *) attachment),
+                                       id, TRUE);
+                               g_string_append_printf(appendix, "<IMG src=\"%s\">\n<BR>", virtual_filename);
+                               g_free(virtual_filename);
+                       }
+                       virtual_filename = construct_virtual_filename(filename,
+                                       g_list_position((GList *)attachment_list, (GList *) attachment),
+                                       id, FALSE);
+                       g_string_append_printf(appendix,
+                               "<A href=\"%s\">%s</A>: %s<BR>\n",
+                               virtual_filename, filename, content_type);
+                       g_free(virtual_filename);
                }
+               attachment = attachment->next;
+       }
+       g_string_append(appendix, "</BODY></HTML>");
+       if (!attachments_found)
+               g_string_assign(appendix, "");
+       return g_string_free(appendix, FALSE);
+}
 
-               parts = parts->next;
+static void
+hyperlinkify_plain_text (GString *txt)
+{
+       GSList *cursor;
+       GSList *match_list = get_url_matches (txt);
+
+       /* we will work backwards, so the offsets stay valid */
+       for (cursor = match_list; cursor; cursor = cursor->next) {
+
+               url_match_t *match = (url_match_t*) cursor->data;
+               gchar *url  = g_strndup (txt->str + match->offset, match->len);
+               gchar *repl = NULL; /* replacement  */
+
+               /* the prefix is NULL: use the one that is already there */
+               repl = g_strdup_printf ("<a href=\"%s%s\">%s</a>",
+                                       match->prefix ? match->prefix : "", url, url);
+
+               /* replace the old thing with our hyperlink
+                * replacement thing */
+               g_string_erase  (txt, match->offset, match->len);
+               g_string_insert (txt, match->offset, repl);
+               
+               g_free (url);
+               g_free (repl);
+
+               g_free (cursor->data);  
        }
+       
+       g_slist_free (match_list);
+}
+
+
+
+static gchar *
+convert_to_html (const gchar *data)
+{
+       int              i;
+       gboolean         first_space = TRUE;
+       GString         *html;      
+       gsize           len;
+
+       if (!data)
+               return NULL;
+
+       len = strlen (data);
+       html = g_string_sized_new (len + 100);  /* just a  guess... */
+       
+       g_string_append_printf (html,
+                               "<html>"
+                               "<head>"
+                               "<meta http-equiv=\"content-type\""
+                               " content=\"text/html; charset=utf8\">"
+                               "</head>"
+                               "<body><tt>");
+       
+       /* replace with special html chars where needed*/
+       for (i = 0; i != len; ++i)  {
+               char    kar = data[i]; 
+               switch (kar) {
+                       
+               case 0:  break; /* ignore embedded \0s */       
+               case '<' : g_string_append   (html, "&lt;"); break;
+               case '>' : g_string_append   (html, "&gt;"); break;
+               case '&' : g_string_append   (html, "&quot;"); break;
+               case '\n': g_string_append   (html, "<br>\n"); break;
+               default:
+                       if (kar == ' ') {
+                               g_string_append (html, first_space ? " " : "&nbsp;");
+                               first_space = FALSE;
+                       } else  if (kar == '\t')
+                               g_string_append (html, "&nbsp; &nbsp;&nbsp;");
+                       else {
+                               int charnum = 0;
+                               first_space = TRUE;
+                               /* optimization trick: accumulate 'normal' chars, then copy */
+                               do {
+                                       kar = data [++charnum + i];
+                                       
+                               } while ((i + charnum < len) &&
+                                        (kar > '>' || (kar != '<' && kar != '>'
+                                                       && kar != '&' && kar !=  ' '
+                                                       && kar != '\n' && kar != '\t')));
+                               g_string_append_len (html, &data[i], charnum);
+                               i += (charnum  - 1);
+                       }
+               }
+       }
+       
+       g_string_append (html, "</tt></body></html>");
+       hyperlinkify_plain_text (html);
+
+       return g_string_free (html, FALSE);
+}
+
+
+
+
+static gint 
+cmp_offsets_reverse (const url_match_t *match1, const url_match_t *match2)
+{
+       return match2->offset - match1->offset;
+}
+
+
+
+/*
+ * check if the match is inside an existing match... */
+static void
+chk_partial_match (const url_match_t *match, int* offset)
+{
+       if (*offset >= match->offset && *offset < match->offset + match->len)
+               *offset = -1;
+}
+
+static GSList*
+get_url_matches (GString *txt)
+{
+       regmatch_t rm;
+        int rv, i, offset = 0;
+        GSList *match_list = NULL;
+
+       static UrlMatchPattern patterns[] = MAIL_VIEWER_URL_MATCH_PATTERNS;
+       const size_t pattern_num = sizeof(patterns)/sizeof(UrlMatchPattern);
+
+       /* initalize the regexps */
+       for (i = 0; i != pattern_num; ++i) {
+               patterns[i].preg = g_new0 (regex_t,1);
+               g_assert(regcomp (patterns[i].preg, patterns[i].regex,
+                                 REG_ICASE|REG_EXTENDED|REG_NEWLINE) == 0);
+       }
+        /* find all the matches */
+       for (i = 0; i != pattern_num; ++i) {
+               offset     = 0; 
+               while (1) {
+                       int test_offset;
+                       if ((rv = regexec (patterns[i].preg, txt->str + offset, 1, &rm, 0)) != 0) {
+                               g_assert (rv == REG_NOMATCH); /* this should not happen */
+                               break; /* try next regexp */ 
+                       }
+                       if (rm.rm_so == -1)
+                               break;
+
+                       /* FIXME: optimize this */
+                       /* to avoid partial matches on something that was already found... */
+                       /* check_partial_match will put -1 in the data ptr if that is the case */
+                       test_offset = offset + rm.rm_so;
+                       g_slist_foreach (match_list, (GFunc)chk_partial_match, &test_offset);
+                       
+                       /* make a list of our matches (<offset, len, prefix> tupels)*/
+                       if (test_offset != -1) {
+                               url_match_t *match = g_new (url_match_t,1);
+                               match->offset = offset + rm.rm_so;
+                               match->len    = rm.rm_eo - rm.rm_so;
+                               match->prefix = patterns[i].prefix;
+                               match_list = g_slist_prepend (match_list, match);
+                       }
+                       offset += rm.rm_eo;
+               }
+       }
+
+       for (i = 0; i != pattern_num; ++i) {
+               regfree (patterns[i].preg);
+               g_free  (patterns[i].preg);
+       } /* don't free patterns itself -- it's static */
+       
+       /* now sort the list, so the matches are in reverse order of occurence.
+        * that way, we can do the replacements starting from the end, so we don't need
+        * to recalculate the offsets
+        */
+       match_list = g_slist_sort (match_list,
+                                  (GCompareFunc)cmp_offsets_reverse); 
+       return match_list;      
+}
+
+static gboolean
+fill_gtkhtml_with_txt (ModestTnyMsgView *self, GtkHTML* gtkhtml, const gchar* txt, TnyMsgIface *msg)
+{
+       GString *html;
+       gchar *html_attachments;
+       
+       g_return_val_if_fail (gtkhtml, FALSE);
+       g_return_val_if_fail (txt, FALSE);
+
+       html = g_string_new(convert_to_html (txt));
+       html_attachments = attachments_as_html(self, msg);
+       g_string_append(html, html_attachments);
+
+       gtk_html_load_from_string (gtkhtml, html->str, html->len);
+       g_string_free (html, TRUE);
+       g_free(html_attachments);
+
+       return TRUE;
+}
+
+
+
+static gboolean
+set_html_message (ModestTnyMsgView *self, TnyMsgMimePartIface *tny_body, TnyMsgIface *msg)
+{
+       gchar *html_attachments;
+       TnyStreamIface *gtkhtml_stream; 
+       ModestTnyMsgViewPrivate *priv;
+       
+       g_return_val_if_fail (self, FALSE);
+       g_return_val_if_fail (tny_body, FALSE);
+       
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
+
+       gtkhtml_stream =
+               TNY_STREAM_IFACE(modest_tny_stream_gtkhtml_new
+                                (gtk_html_begin(GTK_HTML(priv->gtkhtml))));
+       
+       tny_stream_iface_reset (gtkhtml_stream);
+       tny_msg_mime_part_iface_decode_to_stream (tny_body, gtkhtml_stream);
+       html_attachments = attachments_as_html(self, msg);
+       tny_stream_iface_write (gtkhtml_stream, html_attachments, strlen(html_attachments));
+       tny_stream_iface_reset (gtkhtml_stream);
+
+       g_object_unref (G_OBJECT(gtkhtml_stream));
+       g_free (html_attachments);
+       
+       return TRUE;
+}
+
+
+/* this is a hack --> we use the tny_text_buffer_stream to
+ * get the message text, then write to gtkhtml 'by hand' */
+static gboolean
+set_text_message (ModestTnyMsgView *self, TnyMsgMimePartIface *tny_body, TnyMsgIface *msg)
+{
+       GtkTextBuffer *buf;
+       GtkTextIter begin, end;
+       TnyStreamIface* txt_stream;
+       gchar *txt;
+       ModestTnyMsgViewPrivate *priv;
+               
+       g_return_val_if_fail (self, FALSE);
+       g_return_val_if_fail (tny_body, FALSE);
+
+       priv           = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
+       
+       buf            = gtk_text_buffer_new (NULL);
+       txt_stream     = TNY_STREAM_IFACE(tny_text_buffer_stream_new (buf));
+               
+       tny_stream_iface_reset (txt_stream);
+       tny_msg_mime_part_iface_decode_to_stream (tny_body, txt_stream);
+       tny_stream_iface_reset (txt_stream);            
+       
+       gtk_text_buffer_get_bounds (buf, &begin, &end);
+       txt = gtk_text_buffer_get_text (buf, &begin, &end, FALSE);
+       
+       fill_gtkhtml_with_txt (self, GTK_HTML(priv->gtkhtml), txt, msg);
+
+       g_object_unref (G_OBJECT(txt_stream));
+       g_object_unref (G_OBJECT(buf));
+
+       g_free (txt);
+       return TRUE;
+}
+
+gchar *
+modest_tny_msg_view_get_selected_text (ModestTnyMsgView *self)
+{
+       ModestTnyMsgViewPrivate *priv;
+       gchar *sel;
+       GtkWidget *html;
+       int len;
+       GtkClipboard *clip;
+
+       g_return_val_if_fail (self, NULL);
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
+       html = priv->gtkhtml;
+       
+       /* I'm sure there is a better way to check for selected text */
+       sel = gtk_html_get_selection_html(GTK_HTML(html), &len);
+       if (!sel)
+               return NULL;
+       
+       g_free(sel);
+       
+       clip = gtk_widget_get_clipboard(html, GDK_SELECTION_PRIMARY);
+       return gtk_clipboard_wait_for_text(clip);
+}
+
+void
+modest_tny_msg_view_set_message (ModestTnyMsgView *self, TnyMsgIface *msg)
+{
+       TnyMsgMimePartIface *body;
+       ModestTnyMsgViewPrivate *priv;
+
+       g_return_if_fail (self);
+       
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
+
+       priv->msg = msg;
+       
+       fill_gtkhtml_with_txt (self, GTK_HTML(priv->gtkhtml), "", msg);
+       if (!msg) 
+               return;
+       
+       body = modest_tny_msg_actions_find_body_part (msg, TRUE);
+       if (body) {
+               if (tny_msg_mime_part_iface_content_type_is (body, "text/html"))
+                       set_html_message (self, body, msg);
+               else
+                       set_text_message (self, body, msg);
+               return;
+       } else {
+               /* nothing to show */
+       }
+}
+
+void
+modest_tny_msg_view_redraw (ModestTnyMsgView *self)
+{
+       ModestTnyMsgViewPrivate *priv;
+
+       g_return_if_fail (self);
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
+       modest_tny_msg_view_set_message(self, priv->msg);
+}
+
+gboolean
+modest_tny_msg_view_get_show_attachments_inline_flag (ModestTnyMsgView *self)
+{
+       ModestTnyMsgViewPrivate *priv;
+
+       g_return_val_if_fail (self, FALSE);
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
+       return priv->show_attachments_inline;
+}
+
+gboolean
+modest_tny_msg_view_set_show_attachments_inline_flag (ModestTnyMsgView *self, gboolean flag)
+{
+       ModestTnyMsgViewPrivate *priv;
+       gboolean oldflag;
+
+       g_return_val_if_fail (self, FALSE);
+       priv = MODEST_TNY_MSG_VIEW_GET_PRIVATE(self);
+       oldflag = priv->show_attachments_inline;
+       priv->show_attachments_inline = flag;
+       if (priv->show_attachments_inline != oldflag)
+               modest_tny_msg_view_redraw(self);
+       return priv->show_attachments_inline;
 }