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/*
* e-mail-formatter-extension.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/>.
*
*/
#include "e-mail-formatter-extension.h"
G_DEFINE_ABSTRACT_TYPE (
EMailFormatterExtension,
e_mail_formatter_extension,
G_TYPE_OBJECT)
static void
e_mail_formatter_extension_class_init (EMailFormatterExtensionClass *class)
{
class->priority = G_PRIORITY_DEFAULT;
}
static void
e_mail_formatter_extension_init (EMailFormatterExtension *extension)
{
}
/**
* e_mail_formatter_extension_format
* @extension: an #EMailFormatterExtension
* @formatter: an #EMailFormatter
* @context: an #EMailFormatterContext
* @part: a #EMailPart to be formatter
* @stream: a #GOutputStream to which the output should be written
* @cancellable: (allow-none) a #GCancellable
*
* A virtual function reimplemented in all mail formatter extensions. The
* function formats @part, generated HTML (or other format that can be
* displayed to user) and writes it to the @stream.
*
* When the function is unable to format the @part (either because it's broken
* or because it is a different mimetype then the extension is specialized
* for), the function will return @FALSE indicating the #EMailFormatter, that
* it should pick another extension.
*
* Implementation of this function must be thread-safe.
*
* Returns: Returns @TRUE when the @part was successfully formatted and
* data were written to the @stream, @FALSE otherwise.
*/
gboolean
e_mail_formatter_extension_format (EMailFormatterExtension *extension,
EMailFormatter *formatter,
EMailFormatterContext *context,
EMailPart *part,
GOutputStream *stream,
GCancellable *cancellable)
{
EMailFormatterExtensionClass *class;
g_return_val_if_fail (E_IS_MAIL_FORMATTER_EXTENSION (extension), FALSE);
g_return_val_if_fail (E_IS_MAIL_FORMATTER (formatter), FALSE);
g_return_val_if_fail (context != NULL, FALSE);
g_return_val_if_fail (part != NULL, FALSE);
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
class = E_MAIL_FORMATTER_EXTENSION_GET_CLASS (extension);
g_return_val_if_fail (class->format != NULL, FALSE);
return class->format (
extension, formatter, context, part, stream, cancellable);
}
/**
* e_mail_formatter_extension_has_widget:
* @extension: an #EMailFormatterExtension
*
* Returns whether the extension can provide a GtkWidget.
*
* Returns: Returns %TRUE when @extension reimplements get_widget(), %FALSE
* otherwise.
*/
gboolean
e_mail_formatter_extension_has_widget (EMailFormatterExtension *extension)
{
EMailFormatterExtensionClass *class;
g_return_val_if_fail (E_IS_MAIL_FORMATTER_EXTENSION (extension), FALSE);
class = E_MAIL_FORMATTER_EXTENSION_GET_CLASS (extension);
return (class->get_widget != NULL);
}
/**
* e_mail_formatter_extension_get_widget:
* @extension: an #EMailFormatterExtension
* @part: an #EMailPart
* @params: a #GHashTable
*
* A virtual function reimplemented in some mail formatter extensions. The
* function should construct a #GtkWidget for given @part. The @params hash
* table can contain additional parameters listed in the <object> HTML
* element that has requested the widget.
*
* When @bind_dom_func is not %NULL, the callee will set a callback function
* which should be called when the webpage is completely rendered to setup
* bindings between DOM events and the widget.
*
* Returns: Returns a #GtkWidget or %NULL, when error occurs or given
* @extension does not reimplement this method.
*/
GtkWidget *
e_mail_formatter_extension_get_widget (EMailFormatterExtension *extension,
EMailPartList *context,
EMailPart *part,
GHashTable *params)
{
EMailFormatterExtensionClass *class;
GtkWidget *widget = NULL;
g_return_val_if_fail (E_IS_MAIL_FORMATTER_EXTENSION (extension), NULL);
g_return_val_if_fail (part != NULL, NULL);
g_return_val_if_fail (params != NULL, NULL);
class = E_MAIL_FORMATTER_EXTENSION_GET_CLASS (extension);
if (class->get_widget != NULL)
widget = class->get_widget (extension, context, part, params);
return widget;
}
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