8223eaf570
EAttachmentHandler predates EExtension, so this is really just a code cleanup to use the extension framework. But this also demonstrates that extensions can target interfaces as well as instantiable types, since EAttachmentView is an interface. What's also nice is EAttachmentView no longer has to directly interact with attachment handlers. Instead of EAttachmentView having to query each attachment handler for drag-and-drop info, each handler now pushes its own drag-and-drop info to its EAttachmentView during initialization.
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/*
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* e-attachment-handler.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) version 3.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the program; if not, see <http://www.gnu.org/licenses/>
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*
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*
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* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
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*
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*/
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#include "e-attachment-handler.h"
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#define E_ATTACHMENT_HANDLER_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE \
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((obj), E_TYPE_ATTACHMENT_HANDLER, EAttachmentHandlerPrivate))
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struct _EAttachmentHandlerPrivate {
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gpointer placeholder;
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};
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G_DEFINE_TYPE (
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EAttachmentHandler,
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e_attachment_handler,
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E_TYPE_EXTENSION)
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static void
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attachment_handler_constructed (GObject *object)
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{
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EAttachmentView *view;
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EAttachmentHandler *handler;
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GdkDragAction drag_actions;
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GtkTargetList *target_list;
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const GtkTargetEntry *targets;
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guint n_targets;
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handler = E_ATTACHMENT_HANDLER (object);
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drag_actions = e_attachment_handler_get_drag_actions (handler);
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targets = e_attachment_handler_get_target_table (handler, &n_targets);
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view = e_attachment_handler_get_view (handler);
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target_list = e_attachment_view_get_target_list (view);
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gtk_target_list_add_table (target_list, targets, n_targets);
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e_attachment_view_add_drag_actions (view, drag_actions);
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/* Chain up to parent's constructed() method. */
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G_OBJECT_CLASS (e_attachment_handler_parent_class)->
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constructed (object);
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}
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static void
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e_attachment_handler_class_init (EAttachmentHandlerClass *class)
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{
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GObjectClass *object_class;
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EExtensionClass *extension_class;
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g_type_class_add_private (class, sizeof (EAttachmentHandlerPrivate));
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object_class = G_OBJECT_CLASS (class);
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object_class->constructed = attachment_handler_constructed;
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extension_class = E_EXTENSION_CLASS (class);
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extension_class->extensible_type = E_TYPE_ATTACHMENT_VIEW;
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}
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static void
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e_attachment_handler_init (EAttachmentHandler *handler)
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{
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handler->priv = E_ATTACHMENT_HANDLER_GET_PRIVATE (handler);
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}
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EAttachmentView *
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e_attachment_handler_get_view (EAttachmentHandler *handler)
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{
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EExtensible *extensible;
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/* This is purely a convenience function. */
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g_return_val_if_fail (E_IS_ATTACHMENT_HANDLER (handler), NULL);
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extensible = e_extension_get_extensible (E_EXTENSION (handler));
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return E_ATTACHMENT_VIEW (extensible);
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}
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GdkDragAction
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e_attachment_handler_get_drag_actions (EAttachmentHandler *handler)
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{
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EAttachmentHandlerClass *class;
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g_return_val_if_fail (E_IS_ATTACHMENT_HANDLER (handler), 0);
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class = E_ATTACHMENT_HANDLER_GET_CLASS (handler);
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if (class->get_drag_actions != NULL)
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return class->get_drag_actions (handler);
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return 0;
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}
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const GtkTargetEntry *
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e_attachment_handler_get_target_table (EAttachmentHandler *handler,
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guint *n_targets)
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{
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EAttachmentHandlerClass *class;
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g_return_val_if_fail (E_IS_ATTACHMENT_HANDLER (handler), NULL);
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class = E_ATTACHMENT_HANDLER_GET_CLASS (handler);
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if (class->get_target_table != NULL)
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return class->get_target_table (handler, n_targets);
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if (n_targets != NULL)
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*n_targets = 0;
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return NULL;
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}
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