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

/*
 * e-mail-formatter-text-plain.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; 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-util/e-util.h>

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

typedef EMailFormatterExtension EMailFormatterTextPlain;
typedef EMailFormatterExtensionClass EMailFormatterTextPlainClass;

GType e_mail_formatter_text_plain_get_type (void);

G_DEFINE_TYPE (
    EMailFormatterTextPlain,
    e_mail_formatter_text_plain,
    E_TYPE_MAIL_FORMATTER_EXTENSION)

static const gchar *formatter_mime_types[] = {
    "text/plain",
    "text/*",
    "message/*",
    "application/vnd.evolution.plaintext",
    NULL
};

static gboolean
emfe_text_plain_format (EMailFormatterExtension *extension,
                        EMailFormatter *formatter,
                        EMailFormatterContext *context,
                        EMailPart *part,
                        CamelStream *stream,
                        GCancellable *cancellable)
{
    CamelDataWrapper *dw;
    CamelStream *filtered_stream;
    CamelMimeFilter *html_filter;
    gchar *content;
    const gchar *format;
    guint32 rgb;

    if (g_cancellable_is_cancelled (cancellable))
        return FALSE;

    if ((context->mode == E_MAIL_FORMATTER_MODE_RAW) ||
        (context->mode == E_MAIL_FORMATTER_MODE_PRINTING)) {
        CamelMimeFilterToHTMLFlags flags;

        if (context->mode == E_MAIL_FORMATTER_MODE_RAW) {
            gchar *header;
            header = e_mail_formatter_get_html_header (formatter);
            camel_stream_write_string (stream, header, cancellable, NULL);
            g_free (header);

            /* No need for body margins within <iframe> */
            camel_stream_write_string (
                stream,
                "<style>body{ margin: 0; }</style>",
                cancellable, NULL);
        }

        flags = e_mail_formatter_get_text_format_flags (formatter);

        dw = camel_medium_get_content (CAMEL_MEDIUM (part->part));
        if (!dw)
            return FALSE;

        /* Check for RFC 2646 flowed text. */
        if (camel_content_type_is (dw->mime_type, "text", "plain")
        && (format = camel_content_type_param (dw->mime_type, "format"))
        && !g_ascii_strcasecmp (format, "flowed"))
            flags |= CAMEL_MIME_FILTER_TOHTML_FORMAT_FLOWED;

        rgb = e_rgba_to_value (
            e_mail_formatter_get_color (
                formatter, E_MAIL_FORMATTER_COLOR_CITATION));

        filtered_stream = camel_stream_filter_new (stream);
        html_filter = camel_mime_filter_tohtml_new (flags, rgb);
        camel_stream_filter_add (
            CAMEL_STREAM_FILTER (filtered_stream), html_filter);
        g_object_unref (html_filter);

        content = g_strdup_printf (
            "<div class=\"part-container pre\" style=\""
            "border: none; padding: 8px; margin: 0; "
            "background-color: #%06x; color: #%06x;\">\n",
            e_rgba_to_value (
                e_mail_formatter_get_color (
                    formatter, E_MAIL_FORMATTER_COLOR_CONTENT)),
            e_rgba_to_value (
                e_mail_formatter_get_color (
                    formatter, E_MAIL_FORMATTER_COLOR_TEXT)));

        camel_stream_write_string (stream, content, cancellable, NULL);
        e_mail_formatter_format_text (formatter, part, filtered_stream, cancellable);
        camel_stream_flush (filtered_stream, cancellable, NULL);

        g_object_unref (filtered_stream);
        g_free (content);

        camel_stream_write_string (stream, "</div>\n", cancellable, NULL);

        if (context->mode == E_MAIL_FORMATTER_MODE_RAW) {
            camel_stream_write_string (
                stream, "</body></html>",
                cancellable, NULL);
        }

        return TRUE;

    } else {
        CamelFolder *folder;
        const gchar *message_uid;
        gchar *uri, *str;
        const gchar *default_charset, *charset;

        folder = e_mail_part_list_get_folder (context->part_list);
        message_uid = e_mail_part_list_get_message_uid (context->part_list);
        default_charset = e_mail_formatter_get_default_charset (formatter);
        charset = e_mail_formatter_get_charset (formatter);

        if (!default_charset)
            default_charset = "";
        if (!charset)
            charset = "";

        uri = e_mail_part_build_uri (
            folder, message_uid,
            "part_id", G_TYPE_STRING, part->id,
            "mode", G_TYPE_INT, E_MAIL_FORMATTER_MODE_RAW,
            "formatter_default_charset", G_TYPE_STRING, default_charset,
            "formatter_charset", G_TYPE_STRING, charset,
            NULL);

        str = g_strdup_printf (
            "<div class=\"part-container-nostyle\" >"
            "<iframe width=\"100%%\" height=\"10\""
            " id=\"%s.iframe\" name=\"%s\" "
            " frameborder=\"0\" src=\"%s\" "
            " style=\"border: 1px solid #%06x; background-color: #%06x;\">"
            "</iframe>"
            "</div>",
            part->id, part->id, uri,
            e_rgba_to_value (
                e_mail_formatter_get_color (
                    formatter, E_MAIL_FORMATTER_COLOR_FRAME)),
            e_rgba_to_value (
                e_mail_formatter_get_color (
                    formatter, E_MAIL_FORMATTER_COLOR_CONTENT)));

        camel_stream_write_string (stream, str, cancellable, NULL);

        g_free (str);
        g_free (uri);
    }

    return TRUE;
}

static void
e_mail_formatter_text_plain_class_init (EMailFormatterExtensionClass *class)
{
    class->display_name = _("Plain Text");
    class->description = _("Format part as plain text");
    class->mime_types = formatter_mime_types;
    class->priority = G_PRIORITY_LOW;
    class->format = emfe_text_plain_format;
}

static void
e_mail_formatter_text_plain_init (EMailFormatterExtension *extension)
{
}