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

/*
 * e-mail-formatter-attachment.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 "e-mail-format-extensions.h"
#include "e-mail-part-attachment.h"
#include "e-mail-part-attachment-bar.h"

#include <em-format/e-mail-formatter-extension.h>
#include <em-format/e-mail-formatter.h>
#include <em-format/e-mail-part-utils.h>
#include <em-format/e-mail-inline-filter.h>
#include <e-util/e-util.h>

#include <shell/e-shell.h>
#include <shell/e-shell-window.h>

#include <widgets/misc/e-attachment-button.h>

#include <glib/gi18n-lib.h>
#include <camel/camel.h>

#define d(x)

typedef struct _EMailFormatterAttachment {
    GObject parent;
} EMailFormatterAttachment;

typedef struct _EMailFormatterAttachmentClass {
    GObjectClass parent_class;
} EMailFormatterAttachmentClass;

static void e_mail_formatter_formatter_extension_interface_init (EMailFormatterExtensionInterface *iface);
static void e_mail_formatter_mail_extension_interface_init (EMailExtensionInterface *iface);

G_DEFINE_TYPE_EXTENDED (
    EMailFormatterAttachment,
    e_mail_formatter_attachment,
    G_TYPE_OBJECT,
    0,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_EXTENSION,
        e_mail_formatter_mail_extension_interface_init)
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_FORMATTER_EXTENSION,
        e_mail_formatter_formatter_extension_interface_init)
)

static const gchar *formatter_mime_types[] = {
    "application/vnd.evolution.attachment",
    "application/vnd.evolution.widget.attachment-button",
    NULL
};

static EAttachmentStore *
find_attachment_store (EMailPartList *part_list,
                       const gchar *start_id)
{
    EAttachmentStore *store = NULL;
    GQueue queue = G_QUEUE_INIT;
    GList *head, *link;
    gchar *tmp, *pos;
    EMailPart *part;
    gchar *id;

    e_mail_part_list_queue_parts (part_list, NULL, &queue);

    head = g_queue_peek_head_link (&queue);

    id = g_strconcat (start_id, ".attachment-bar", NULL);
    tmp = g_strdup (id);
    part = NULL;
    do {
        d (printf ("Looking up attachment bar as %s\n", id));

        for (link = head; link != NULL; link = g_list_next (link)) {
            EMailPart *p = link->data;

            if (g_strcmp0 (p->id, id) == 0) {
                part = p;
                break;
            }
        }

        pos = g_strrstr (tmp, ".");
        if (!pos)
            break;

        g_free (id);
        g_free (tmp);
        tmp = g_strndup (start_id, pos - tmp);
        id = g_strdup_printf ("%s.attachment-bar", tmp);

    } while (pos && !part);

    g_free (id);
    g_free (tmp);

    if (part != NULL)
        store = ((EMailPartAttachmentBar *) part)->store;

    while (!g_queue_is_empty (&queue))
        e_mail_part_unref (g_queue_pop_head (&queue));

    return store;
}

static gboolean
emfe_attachment_format (EMailFormatterExtension *extension,
                        EMailFormatter *formatter,
                        EMailFormatterContext *context,
                        EMailPart *part,
                        CamelStream *stream,
                        GCancellable *cancellable)
{
    gchar *str, *text, *html;
    gchar *button_id;
    EAttachmentStore *store;
    EMailExtensionRegistry *reg;
    GQueue *extensions;
    EMailPartAttachment *empa;
    gchar *attachment_part_id;

    g_return_val_if_fail (E_MAIL_PART_IS (part, EMailPartAttachment), FALSE);

    empa = (EMailPartAttachment *) part;

    if ((context->mode == E_MAIL_FORMATTER_MODE_NORMAL) ||
        (context->mode == E_MAIL_FORMATTER_MODE_PRINTING) ||
        (context->mode == E_MAIL_FORMATTER_MODE_ALL_HEADERS)) {
        if (part->validities) {
            GSList *lst;

            for (lst = part->validities; lst; lst = lst->next) {
                EMailPartValidityPair *pair = lst->data;

                if (!pair)
                    continue;

                if ((pair->validity_type & E_MAIL_PART_VALIDITY_SIGNED) != 0)
                    e_attachment_set_signed (empa->attachment, pair->validity->sign.status);

                if ((pair->validity_type & E_MAIL_PART_VALIDITY_ENCRYPTED) != 0)
                    e_attachment_set_encrypted (empa->attachment, pair->validity->encrypt.status);
            }
        }

        store = find_attachment_store (context->part_list, part->id);
        if (store) {
            GList *attachments = e_attachment_store_get_attachments (store);
            if (!g_list_find (attachments, empa->attachment)) {
                e_attachment_store_add_attachment (
                    store, empa->attachment);
            }
            g_list_free (attachments);
        } else {
            g_warning ("Failed to locate attachment-bar for %s", part->id);
        }
    }

        /* If the attachment is requested as RAW, then call the handler directly
         * and do not append any other code. */
    if ((context->mode == E_MAIL_FORMATTER_MODE_RAW) ||
        (context->mode == E_MAIL_FORMATTER_MODE_PRINTING)) {
        EMailExtensionRegistry *reg;
        GQueue *extensions;
        GList *iter;
        reg = e_mail_formatter_get_extension_registry (formatter);

        extensions = e_mail_extension_registry_get_for_mime_type (
                    reg, empa->snoop_mime_type);
        if (!extensions) {
            extensions = e_mail_extension_registry_get_fallback (
                    reg, empa->snoop_mime_type);
        }

        if (!extensions)
            return FALSE;

        if (context->mode == E_MAIL_FORMATTER_MODE_PRINTING) {
            gchar *name;
            EAttachment *attachment;
            GFileInfo *fi;
            const gchar *description;

            attachment = empa->attachment;
            fi = e_attachment_get_file_info (attachment);

            description = e_attachment_get_description (attachment);
            if (description && *description) {
                name = g_strdup_printf (
                    "<h2>Attachment: %s (%s)</h2>\n",
                    description, g_file_info_get_display_name (fi));
            } else {
                name = g_strdup_printf (
                    "<h2>Attachment: %s</h2>\n",
                    g_file_info_get_display_name (fi));
            }

            camel_stream_write_string (stream, name, cancellable, NULL);
            g_free (name);
        }

        for (iter = g_queue_peek_head_link (extensions); iter; iter = iter->next) {

            EMailFormatterExtension *ext;
            ext = iter->data;
            if (!ext)
                continue;

            if (e_mail_formatter_extension_format (ext, formatter,
                context, part, stream, cancellable)) {
                return TRUE;
            }
        }

        return FALSE;
    }

    /* E_MAIL_FORMATTER_MODE_NORMAL: */

    reg = e_mail_formatter_get_extension_registry (formatter);
    extensions = e_mail_extension_registry_get_for_mime_type (
                reg, empa->snoop_mime_type);

    if (!extensions) {
        extensions = e_mail_extension_registry_get_fallback (
                reg, empa->snoop_mime_type);
    }

    text = e_mail_part_describe (part->part, empa->snoop_mime_type);
    html = camel_text_to_html (
        text, e_mail_formatter_get_text_format_flags (formatter) &
        CAMEL_MIME_FILTER_TOHTML_CONVERT_URLS, 0);
    g_free (text);

    if (empa->attachment_view_part_id)
        attachment_part_id = empa->attachment_view_part_id;
    else
        attachment_part_id = part->id;

    button_id = g_strconcat (attachment_part_id, ".attachment_button", NULL);

    str = g_strdup_printf (
        "<div class=\"attachment\">"
        "<table width=\"100%%\" border=\"0\">"
        "<tr valign=\"middle\">"
        "<td align=\"left\" width=\"100\">"
        "<object type=\"application/vnd.evolution.widget.attachment-button\" "
        "height=\"20\" width=\"100\" data=\"%s\" id=\"%s\"></object>"
        "</td>"
        "<td align=\"left\">%s</td>"
        "</tr>", part->id, button_id, html);

    camel_stream_write_string (stream, str, cancellable, NULL);
    g_free (button_id);
    g_free (str);
    g_free (html);

    if (extensions) {
        GList *iter;
        CamelStream *content_stream;
        gboolean ok;

        content_stream = camel_stream_mem_new ();
        ok = FALSE;
        if (empa->attachment_view_part_id != NULL) {
            EMailPart *attachment_view_part;

            attachment_view_part = e_mail_part_list_ref_part (
                context->part_list,
                empa->attachment_view_part_id);

            if (attachment_view_part != NULL) {
                ok = e_mail_formatter_format_as (
                    formatter, context,
                    attachment_view_part,
                    content_stream, NULL,
                    cancellable);
                e_mail_part_unref (attachment_view_part);
            }

        } else {

            for (iter = g_queue_peek_head_link (extensions); iter; iter = iter->next) {

                EMailFormatterExtension *ext;

                ext = iter->data;
                if (!ext)
                    continue;

                if (e_mail_formatter_extension_format (
                        ext, formatter, context,
                        part, content_stream,
                        cancellable)) {
                    ok = TRUE;
                    break;
                }
            }
        }

        if (ok) {
            str = g_strdup_printf (
                "<tr><td colspan=\"2\">"
                "<div class=\"attachment-wrapper\" id=\"%s\">",
                attachment_part_id);

            camel_stream_write_string (
                stream, str, cancellable, NULL);
            g_free (str);

            g_seekable_seek (
                G_SEEKABLE (content_stream), 0,
                G_SEEK_SET, cancellable, NULL);
            camel_stream_write_to_stream (
                    content_stream, stream,
                    cancellable, NULL);

            camel_stream_write_string (
                stream, "</div></td></tr>", cancellable, NULL);
        }

        g_object_unref (content_stream);
    }

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

    return TRUE;
}

static GtkWidget *
emfe_attachment_get_widget (EMailFormatterExtension *extension,
                            EMailPartList *context,
                            EMailPart *part,
                            GHashTable *params)
{
    EMailPartAttachment *empa;
    EAttachmentStore *store;
    EAttachmentView *view;
    GtkWidget *widget;

    g_return_val_if_fail (E_MAIL_PART_IS (part, EMailPartAttachment), NULL);
    empa = (EMailPartAttachment *) part;

    store = find_attachment_store (context, part->id);
    widget = e_attachment_button_new ();
    g_object_set_data (G_OBJECT (widget), "uri", part->id);
    e_attachment_button_set_attachment (
        E_ATTACHMENT_BUTTON (widget), empa->attachment);
    view = g_object_get_data (G_OBJECT (store), "attachment-bar");
    if (view) {
        e_attachment_button_set_view (
            E_ATTACHMENT_BUTTON (widget), view);
    }

    gtk_widget_set_can_focus (widget, TRUE);
    gtk_widget_show (widget);

    return widget;
}

static const gchar *
emfe_attachment_get_display_name (EMailFormatterExtension *extension)
{
    return _("Attachment");
}

static const gchar *
emfe_attachment_get_description (EMailFormatterExtension *extension)
{
    return _("Display as attachment");
}

static void
e_mail_formatter_attachment_class_init (EMailFormatterAttachmentClass *class)
{
}

static void
e_mail_formatter_formatter_extension_interface_init (EMailFormatterExtensionInterface *iface)
{
    iface->format = emfe_attachment_format;
    iface->get_widget = emfe_attachment_get_widget;
    iface->get_display_name = emfe_attachment_get_display_name;
    iface->get_description = emfe_attachment_get_description;
}

static void
e_mail_formatter_mail_extension_interface_init (EMailExtensionInterface *iface)
{
    iface->mime_types = formatter_mime_types;
}

static void
e_mail_formatter_attachment_init (EMailFormatterAttachment *formatter)
{

}