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-rw-r--r--em-format/e-mail-part-utils.c546
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diff --git a/em-format/e-mail-part-utils.c b/em-format/e-mail-part-utils.c
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+/*
+ * e-mail-part-utils.h
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <glib/gi18n-lib.h>
+
+#include "e-mail-part-utils.h"
+#include "e-mail-parser-extension.h"
+
+#include <camel/camel.h>
+#include <e-util/e-util.h>
+#include <gdk/gdk.h>
+
+#include <libsoup/soup.h>
+
+#include <string.h>
+
+#define d(x)
+
+/**
+ * e_mail_parst_is_secured:
+ * @part: a #CamelMimePart
+ *
+ * Whether @part is signed or encrypted or not.
+ *
+ * Return Value: TRUE/FALSE
+ */
+gboolean
+e_mail_part_is_secured (CamelMimePart *part)
+{
+ CamelContentType *ct = camel_mime_part_get_content_type (part);
+
+ return (camel_content_type_is (ct, "multipart", "signed") ||
+ camel_content_type_is (ct, "multipart", "encrypted") ||
+ camel_content_type_is (ct, "application", "x-inlinepgp-signed") ||
+ camel_content_type_is (ct, "application", "x-inlinepgp-encrypted") ||
+ camel_content_type_is (ct, "application", "x-pkcs7-mime") ||
+ camel_content_type_is (ct, "application", "pkcs7-mime"));
+}
+
+/**
+ * e_mail_partr_snoop_type:
+ * @part: a #CamelMimePart
+ *
+ * Tries to snoop the mime type of a part.
+ *
+ * Return value: %NULL if unknown (more likely application/octet-stream).
+ **/
+const gchar *
+e_mail_part_snoop_type (CamelMimePart *part)
+{
+ /* cache is here only to be able still return const gchar * */
+ static GHashTable *types_cache = NULL;
+
+ const gchar *filename;
+ gchar *name_type = NULL, *magic_type = NULL, *res, *tmp;
+ CamelDataWrapper *dw;
+
+ filename = camel_mime_part_get_filename (part);
+ if (filename != NULL)
+ name_type = e_util_guess_mime_type (filename, FALSE);
+
+ dw = camel_medium_get_content ((CamelMedium *) part);
+ if (!camel_data_wrapper_is_offline (dw)) {
+ GByteArray *byte_array;
+ CamelStream *stream;
+
+ byte_array = g_byte_array_new ();
+ stream = camel_stream_mem_new_with_byte_array (byte_array);
+
+ if (camel_data_wrapper_decode_to_stream_sync (dw, stream, NULL, NULL) > 0) {
+ gchar *content_type;
+
+ content_type = g_content_type_guess (
+ filename, byte_array->data,
+ byte_array->len, NULL);
+
+ if (content_type != NULL)
+ magic_type = g_content_type_get_mime_type (content_type);
+
+ g_free (content_type);
+ }
+
+ g_object_unref (stream);
+ }
+
+ /* If gvfs doesn't recognize the data by magic, but it
+ * contains English words, it will call it text/plain. If the
+ * filename-based check came up with something different, use
+ * that instead and if it returns "application/octet-stream"
+ * try to do better with the filename check.
+ */
+
+ if (magic_type) {
+ if (name_type
+ && (!strcmp(magic_type, "text/plain")
+ || !strcmp(magic_type, "application/octet-stream")))
+ res = name_type;
+ else
+ res = magic_type;
+ } else
+ res = name_type;
+
+ if (res != name_type)
+ g_free (name_type);
+
+ if (res != magic_type)
+ g_free (magic_type);
+
+ if (!types_cache)
+ types_cache = g_hash_table_new_full (
+ g_str_hash, g_str_equal,
+ (GDestroyNotify) g_free,
+ (GDestroyNotify) NULL);
+
+ if (res) {
+ tmp = g_hash_table_lookup (types_cache, res);
+ if (tmp) {
+ g_free (res);
+ res = tmp;
+ } else {
+ g_hash_table_insert (types_cache, res, res);
+ }
+ }
+
+ d(printf("Snooped mime type %s\n", res));
+ return res;
+
+ /* We used to load parts to check their type, we don't anymore,
+ * see bug #211778 for some discussion */
+}
+
+/**
+ * e_mail_part_is_attachment
+ * @part: Part to check.
+ *
+ * Returns true if the part is an attachment.
+ *
+ * A part is not considered an attachment if it is a
+ * multipart, or a text part with no filename. It is used
+ * to determine if an attachment header should be displayed for
+ * the part.
+ *
+ * Content-Disposition is not checked.
+ *
+ * Return value: TRUE/FALSE
+ **/
+gboolean
+e_mail_part_is_attachment (CamelMimePart *part)
+{
+ /*CamelContentType *ct = camel_mime_part_get_content_type(part);*/
+ CamelDataWrapper *dw = camel_medium_get_content ((CamelMedium *) part);
+
+ if (!dw)
+ return 0;
+
+ d(printf("checking is attachment %s/%s\n", dw->mime_type->type, dw->mime_type->subtype));
+ return !(camel_content_type_is (dw->mime_type, "multipart", "*")
+ || camel_content_type_is (
+ dw->mime_type, "application", "x-pkcs7-mime")
+ || camel_content_type_is (
+ dw->mime_type, "application", "pkcs7-mime")
+ || camel_content_type_is (
+ dw->mime_type, "application", "x-inlinepgp-signed")
+ || camel_content_type_is (
+ dw->mime_type, "application", "x-inlinepgp-encrypted")
+ || camel_content_type_is (
+ dw->mime_type, "x-evolution", "evolution-rss-feed")
+ || camel_content_type_is (dw->mime_type, "text", "calendar")
+ || camel_content_type_is (dw->mime_type, "text", "x-calendar")
+ || (camel_content_type_is (dw->mime_type, "text", "*")
+ && camel_mime_part_get_filename (part) == NULL));
+}
+
+/**
+ * e_mail_part_preserve_charset_in_content_type:
+ * @ipart: Source #CamelMimePart
+ * @opart: Target #CamelMimePart
+ *
+ * Copies 'charset' part of content-type header from @ipart to @opart.
+ */
+void
+e_mail_part_preserve_charset_in_content_type (CamelMimePart *ipart,
+ CamelMimePart *opart)
+{
+ CamelDataWrapper *data_wrapper;
+ CamelContentType *content_type;
+ const gchar *charset;
+
+ g_return_if_fail (ipart != NULL);
+ g_return_if_fail (opart != NULL);
+
+ data_wrapper = camel_medium_get_content (CAMEL_MEDIUM (ipart));
+ content_type = camel_data_wrapper_get_mime_type_field (data_wrapper);
+
+ if (content_type == NULL)
+ return;
+
+ charset = camel_content_type_param (content_type, "charset");
+
+ if (charset == NULL || *charset == '\0')
+ return;
+
+ data_wrapper = camel_medium_get_content (CAMEL_MEDIUM (opart));
+ content_type = camel_data_wrapper_get_mime_type_field (data_wrapper);
+
+ if (content_type)
+ camel_content_type_set_param (content_type, "charset", charset);
+
+ /* update charset also on the part itself */
+ data_wrapper = CAMEL_DATA_WRAPPER (opart);
+ content_type = camel_data_wrapper_get_mime_type_field (data_wrapper);
+ if (content_type)
+ camel_content_type_set_param (content_type, "charset", charset);
+}
+
+/**
+ * e_mail_part_get_related_display_part:
+ * @part: a multipart/related or multipart/alternative #CamelMimePart
+ * @out_displayid: (out) returns index of the returned part
+ *
+ * Goes through all subparts of given @part and tries to determine which
+ * part should be displayed and which parts are just attachments to the
+ * part.
+ *
+ * Return Value: A #CamelMimePart that should be displayed
+ */
+CamelMimePart *
+e_mail_part_get_related_display_part (CamelMimePart *part,
+ gint *out_displayid)
+{
+ CamelMultipart *mp;
+ CamelMimePart *body_part, *display_part = NULL;
+ CamelContentType *content_type;
+ const gchar *start;
+ gint i, nparts, displayid = 0;
+
+ mp = (CamelMultipart *) camel_medium_get_content ((CamelMedium *) part);
+
+ if (!CAMEL_IS_MULTIPART (mp))
+ return NULL;
+
+ nparts = camel_multipart_get_number (mp);
+ content_type = camel_mime_part_get_content_type (part);
+ start = camel_content_type_param (content_type, "start");
+ if (start && strlen (start) > 2) {
+ gint len;
+ const gchar *cid;
+
+ /* strip <>'s from CID */
+ len = strlen (start) - 2;
+ start++;
+
+ for (i = 0; i < nparts; i++) {
+ body_part = camel_multipart_get_part (mp, i);
+ cid = camel_mime_part_get_content_id (body_part);
+
+ if (cid && !strncmp (cid, start, len) && strlen (cid) == len) {
+ display_part = body_part;
+ displayid = i;
+ break;
+ }
+ }
+ } else {
+ display_part = camel_multipart_get_part (mp, 0);
+ }
+
+ if (out_displayid)
+ *out_displayid = displayid;
+
+ return display_part;
+}
+
+void
+e_mail_part_animation_extract_frame (const GByteArray *anim,
+ gchar **frame,
+ gsize *len)
+{
+ GdkPixbufLoader *loader;
+ GdkPixbufAnimation *animation;
+ GdkPixbuf *frame_buf;
+
+ /* GIF89a (GIF image signature) */
+ const gchar GIF_HEADER[] = { 0x47, 0x49, 0x46, 0x38, 0x39, 0x61 };
+ const gint GIF_HEADER_LEN = sizeof (GIF_HEADER);
+
+ /* NETSCAPE2.0 (extension describing animated GIF, starts on 0x310) */
+ const gchar GIF_APPEXT[] = { 0x4E, 0x45, 0x54, 0x53, 0x43, 0x41,
+ 0x50, 0x45, 0x32, 0x2E, 0x30 };
+ const gint GIF_APPEXT_LEN = sizeof (GIF_APPEXT);
+
+ if ((anim == NULL) || (anim->data == NULL)) {
+ *frame = NULL;
+ *len = 0;
+ return;
+ }
+
+ /* Check if the image is an animated GIF. We don't care about any
+ * other animated formats (APNG or MNG) as WebKit does not support them
+ * and displays only the first frame. */
+ if ((anim->len < 0x331)
+ || (memcmp (anim->data, GIF_HEADER, GIF_HEADER_LEN) != 0)
+ || (memcmp (&anim->data[0x310], GIF_APPEXT, GIF_APPEXT_LEN) != 0)) {
+
+ *frame = g_memdup (anim->data, anim->len);
+ *len = anim->len;
+ return;
+ }
+
+ loader = gdk_pixbuf_loader_new ();
+ gdk_pixbuf_loader_write (loader, (guchar *) anim->data, anim->len, NULL);
+ gdk_pixbuf_loader_close (loader, NULL);
+ animation = gdk_pixbuf_loader_get_animation (loader);
+ if (!animation) {
+
+ *frame = g_memdup (anim->data, anim->len);
+ *len = anim->len;
+ g_object_unref (loader);
+ return;
+ }
+
+ /* Extract first frame */
+ frame_buf = gdk_pixbuf_animation_get_static_image (animation);
+ if (!frame_buf) {
+ *frame = g_memdup (anim->data, anim->len);
+ *len = anim->len;
+ g_object_unref (loader);
+ g_object_unref (animation);
+ return;
+ }
+
+ /* Unforunatelly, GdkPixbuf cannot save to GIF, but WebKit does not
+ * have any trouble displaying PNG image despite the part having
+ * image/gif mime-type */
+ gdk_pixbuf_save_to_buffer (frame_buf, frame, len, "png", NULL, NULL);
+
+ g_object_unref (loader);
+}
+
+/**
+ * e_mail_part_build_url:
+ * @folder: (allow-none) a #CamelFolder with the message or %NULL
+ * @message_uid: (allow-none) uid of the message within the @folder or %NULL
+ * @first_param_name: Name of first query parameter followed by GType of it's value and value
+ * terminated by %NULL.
+ *
+ * Construct a URI for message.
+ *
+ * The URI can contain multiple query parameters. The list of parameters must be
+ * NULL-terminated. Each query must contain name, GType of value and value.
+ *
+ * Return Value: a URL of a message or part
+ */
+gchar *
+e_mail_part_build_uri (CamelFolder *folder,
+ const gchar *message_uid,
+ const gchar *first_param_name,
+ ...)
+{
+ CamelStore *store;
+ gchar *uri, *tmp;
+ va_list ap;
+ const gchar *name;
+ const gchar *service_uid, *folder_name;
+ gchar separator;
+
+ g_return_val_if_fail (message_uid && *message_uid, NULL);
+
+ if (!folder) {
+ folder_name = "generic";
+ service_uid = "generic";
+ } else {
+ tmp = (gchar *) camel_folder_get_full_name (folder);
+ folder_name = (const gchar *) soup_uri_encode (tmp, NULL);
+ store = camel_folder_get_parent_store (folder);
+ if (store)
+ service_uid = camel_service_get_uid (CAMEL_SERVICE (store));
+ else
+ service_uid = "generic";
+ }
+
+ tmp = g_strdup_printf ("mail://%s/%s/%s",
+ service_uid,
+ folder_name,
+ message_uid);
+
+ if (folder) {
+ g_free ((gchar *) folder_name);
+ }
+
+ va_start (ap, first_param_name);
+ name = first_param_name;
+ separator = '?';
+ while (name) {
+ gchar *tmp2;
+ gint type = va_arg (ap, gint);
+ switch (type) {
+ case G_TYPE_INT:
+ case G_TYPE_BOOLEAN: {
+ gint val = va_arg (ap, gint);
+ tmp2 = g_strdup_printf ("%s%c%s=%d", tmp,
+ separator, name, val);
+ break;
+ }
+ case G_TYPE_FLOAT:
+ case G_TYPE_DOUBLE: {
+ gdouble val = va_arg (ap, double);
+ tmp2 = g_strdup_printf ("%s%c%s=%f", tmp,
+ separator, name, val);
+ break;
+ }
+ case G_TYPE_STRING: {
+ gchar *val = va_arg (ap, gchar *);
+ gchar *escaped = soup_uri_encode (val, NULL);
+ tmp2 = g_strdup_printf ("%s%c%s=%s", tmp,
+ separator, name, escaped);
+ g_free (escaped);
+ break;
+ }
+ default:
+ g_warning ("Invalid param type %s", g_type_name (type));
+ return NULL;
+ }
+
+ g_free (tmp);
+ tmp = tmp2;
+
+ if (separator == '?')
+ separator = '&';
+
+ name = va_arg (ap, gchar *);
+ }
+ va_end (ap);
+
+ uri = tmp;
+ if (uri == NULL)
+ return NULL;
+
+ /* For some reason, webkit won't accept URL with username, but
+ * without password (mail://store@host/folder/mail), so we
+ * will replace the '@' symbol by '/' to get URL like
+ * mail://store/host/folder/mail which is OK
+ */
+ while ((tmp = strchr (uri, '@')) != NULL) {
+ tmp[0] = '/';
+ }
+
+ return uri;
+}
+
+/**
+ * e_mail_part_describe:
+ * @part: a #CamelMimePart
+ * @mimetype: mimetype of the content
+ *
+ * Generate a simple textual description of a part, @mime_type represents
+ * the content.
+ *
+ * Return value:
+ **/
+gchar *
+e_mail_part_describe (CamelMimePart *part,
+ const gchar *mime_type)
+{
+ GString *stext;
+ const gchar *filename, *description;
+ gchar *content_type, *desc;
+
+ stext = g_string_new("");
+ content_type = g_content_type_from_mime_type (mime_type);
+ desc = g_content_type_get_description (
+ content_type != NULL ? content_type : mime_type);
+ g_free (content_type);
+ g_string_append_printf (
+ stext, _("%s attachment"), desc ? desc : mime_type);
+ g_free (desc);
+
+ filename = camel_mime_part_get_filename (part);
+ description = camel_mime_part_get_description (part);
+
+ if (!filename || !*filename) {
+ CamelDataWrapper *content;
+
+ content = camel_medium_get_content (CAMEL_MEDIUM (part));
+
+ if (CAMEL_IS_MIME_MESSAGE (content))
+ filename = camel_mime_message_get_subject (
+ CAMEL_MIME_MESSAGE (content));
+ }
+
+ if (filename != NULL && *filename != '\0') {
+ gchar *basename = g_path_get_basename (filename);
+ g_string_append_printf (stext, " (%s)", basename);
+ g_free (basename);
+ }
+
+ if (description != NULL && *description != '\0' &&
+ g_strcmp0 (filename, description) != 0)
+ g_string_append_printf (stext, ", \"%s\"", description);
+
+ return g_string_free (stext, FALSE);
+}
+
+gboolean
+e_mail_part_is_inline (CamelMimePart *mime_part,
+ GQueue *extensions)
+{
+ const gchar *disposition;
+ EMailParserExtension *extension;
+
+ if ((extensions == NULL) || g_queue_is_empty (extensions))
+ return FALSE;
+
+ extension = g_queue_peek_head (extensions);
+ /* Some types need to override the disposition.
+ * e.g. application/x-pkcs7-mime */
+ if (e_mail_parser_extension_get_flags (extension) &
+ E_MAIL_PARSER_EXTENSION_INLINE_DISPOSITION)
+ return TRUE;
+
+ disposition = camel_mime_part_get_disposition (mime_part);
+ if (disposition != NULL)
+ return g_ascii_strcasecmp (disposition, "inline") == 0;
+
+ /* Otherwise, use the default for this handler type. */
+ return (e_mail_parser_extension_get_flags (extension) &
+ E_MAIL_PARSER_EXTENSION_INLINE) != 0;
+}
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