path: root/em-format/e-mail-formatter-image.c

/*
 * image-any.c
 *
 * 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.
 *
 * 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 General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <glib/gi18n-lib.h>

#include <e-util/e-util.h>

#include "e-mail-formatter-extension.h"
#include "e-mail-inline-filter.h"
#include "e-mail-parser-extension.h"
#include "e-mail-part-utils.h"

typedef EMailFormatterExtension EMailFormatterImage;
typedef EMailFormatterExtensionClass EMailFormatterImageClass;

GType e_mail_formatter_image_get_type (void);

G_DEFINE_TYPE (
    EMailFormatterImage,
    e_mail_formatter_image,
    E_TYPE_MAIL_FORMATTER_EXTENSION)

static const gchar *formatter_mime_types[] = {
    "image/gif",
    "image/jpeg",
    "image/png",
    "image/x-png",
    "image/x-bmp",
    "image/bmp",
    "image/svg",
    "image/x-cmu-raster",
    "image/x-ico",
    "image/x-portable-anymap",
    "image/x-portable-bitmap",
    "image/x-portable-graymap",
    "image/x-portable-pixmap",
    "image/x-xpixmap",
    "image/jpg",
    "image/pjpeg",
    "image/*",
    NULL
};

static gboolean
emfe_image_format (EMailFormatterExtension *extension,
                   EMailFormatter *formatter,
                   EMailFormatterContext *context,
                   EMailPart *part,
                   GOutputStream *stream,
                   GCancellable *cancellable)
{
    gchar *content;
    CamelMimePart *mime_part;
    CamelDataWrapper *dw;
    GBytes *bytes;
    GOutputStream *raw_content;

    if (g_cancellable_is_cancelled (cancellable))
        return FALSE;

    mime_part = e_mail_part_ref_mime_part (part);
    dw = camel_medium_get_content (CAMEL_MEDIUM (mime_part));
    g_return_val_if_fail (dw, FALSE);

    raw_content = g_memory_output_stream_new_resizable ();
    camel_data_wrapper_decode_to_output_stream_sync (
        dw, raw_content, cancellable, NULL);
    g_output_stream_close (raw_content, NULL, NULL);

    bytes = g_memory_output_stream_steal_as_bytes (
        G_MEMORY_OUTPUT_STREAM (raw_content));

    if (context->mode == E_MAIL_FORMATTER_MODE_RAW) {

        if (!e_mail_formatter_get_animate_images (formatter)) {

            gchar *buff;
            gsize len;

            e_mail_part_animation_extract_frame (
                bytes, &buff, &len);

            g_output_stream_write_all (
                stream, buff, len, NULL, cancellable, NULL);

            g_free (buff);

        } else {
            gconstpointer data;
            gsize size;

            data = g_bytes_get_data (bytes, &size);

            g_output_stream_write_all (
                stream, data, size, NULL, cancellable, NULL);
        }

    } else {
        gchar *buffer;
        const gchar *mime_type;

        if (!e_mail_formatter_get_animate_images (formatter)) {

            gchar *buff;
            gsize len;

            e_mail_part_animation_extract_frame (
                bytes, &buff, &len);

            content = g_base64_encode ((guchar *) buff, len);
            g_free (buff);

        } else {
            gconstpointer data;
            gsize size;

            data = g_bytes_get_data (bytes, &size);
            content = g_base64_encode (data, size);
        }

        mime_type = e_mail_part_get_mime_type (part);
        if (mime_type == NULL)
            mime_type = "image/*";

        /* The image is already base64-encrypted so we can directly
         * paste it to the output */
        buffer = g_strdup_printf (
            "<img src=\"data:%s;base64,%s\" "
            "     style=\"max-width: 100%%;\" />",
            mime_type, content);

        g_output_stream_write_all (
            stream, buffer, strlen (buffer),
            NULL, cancellable, NULL);

        g_free (buffer);
        g_free (content);
    }

    g_bytes_unref (bytes);

    g_object_unref (raw_content);

    g_object_unref (mime_part);

    return TRUE;
}

static void
e_mail_formatter_image_class_init (EMailFormatterExtensionClass *class)
{
    class->display_name = _("Regular Image");
    class->description = _("Display part as an image");
    class->mime_types = formatter_mime_types;
    class->priority = G_PRIORITY_LOW;
    class->format = emfe_image_format;
}

static void
e_mail_formatter_image_init (EMailFormatterExtension *extension)
{
}