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/* subject.vala
*
* Copyright © 2011-2012 Collabora Ltd.
* By Seif Lotfy <seif@lotfy.com>
* By Siegfried-Angel Gevatter Pujals <siegfried@gevatter.com>
* Copyright © 2011 Manish Sinha <manishsinha@ubuntu.com>
* Copyright © 2011 Michal Hruby <michal.mhr@gmail.com>
* Copyright © 2012 Canonical Ltd.
* By Siegfried-A. Gevatter <siegfried.gevatter@collabora.co.uk>
*
* 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 2.1 of the License, or
* (at your option) any later version.
*
* 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/>.
*
*/
using Zeitgeist;
namespace Zeitgeist
{
/**
* Subject objects abstract Zeitgeist subjects
*
* In Zeitgeist terminology, a //subject// is something (a file, web page,
* person, conversation, etc.) that was somehow involved or affected by
* a {@link Event}.
*/
public class Subject : Object
{
private static StringChunk url_store;
public string? uri { get; set; }
public string? origin { get; set; }
public string? text { get; set; }
public string? storage { get; set; }
// FIXME: current_{uri,origin} are often the same as uri, we don't
// need to waste memory for them
public string? current_uri { get; set; }
public string? current_origin { get; set; }
public string? mimetype
{
get { return _mimetype; }
set { _mimetype = (value != null) ? url_store.insert_const (value) : null; }
}
public string? interpretation
{
get { return _interpretation; }
set { _interpretation = (value != null) ? url_store.insert_const (value) : null; }
}
public string? manifestation
{
get { return _manifestation; }
set { _manifestation = (value != null) ? url_store.insert_const (value) : null; }
}
private unowned string? _mimetype;
private unowned string? _interpretation;
private unowned string? _manifestation;
static construct
{
url_store = new StringChunk (4096);
}
/**
* Create a new Subject structure with predefined data
* @param uri The URI or URL of the subject
* @param interpretation The interpretation type of the subject.
* @param manifestation The manifestation type of the subject.
* @param mimetype The mimetype of the subject. Eg. <emphasis>text/plain</emphasis>
* @param origin The origin of the subject.
* @param text A small textual representation of the subject suitable for display
* @param storage String identifier for the storage medium the subject is on.
*
* @return A newly create {@link Subject} instance. The returned subject will
* have a floating reference which will be consumed if you pass the
* event to any of the methods provided by this library (like
* adding it to an event).
*/
public Subject.full (string? uri=null,
string? interpretation=null, string? manifestation=null,
string? mimetype=null, string? origin=null, string? text=null,
string? storage=null)
{
this.uri = uri;
this.interpretation = interpretation;
this.manifestation = manifestation;
this.mimetype = mimetype;
this.origin = origin;
this.text = text;
this.storage = storage;
}
/**
* Create a new Subject structure to describe a move event
*
* @param source_uri The URI or URL of the subject
* @param source_origin The URI or URL of the subject
* @param destination_uri The URI or URL of the subject
* @param destination_origin The URI or URL of the subject
* @param interpretation The interpretation type of the subject.
* @param manifestation The manifestation type of the subject.
* @param mimetype The mimetype of the subject. Eg. <emphasis>text/plain</emphasis>
* @param text A small textual representation of the subject suitable for display
* @param storage String identifier for the storage medium the subject is on.
*
* @return A newly create {@link Subject} instance. The returned subject will
* have a floating reference which will be consumed if you pass the
* event to any of the methods provided by this library (like
* adding it to an event).
*/
public Subject.move_event (
string? source_uri=null, string? source_origin=null,
string? destination_uri=null, string? destination_origin=null,
string? interpretation, string? manifestation=null,
string? mimetype=null, string? text=null, string? storage=null)
{
this.uri = source_uri;
this.origin = source_origin;
this.current_uri = destination_uri;
this.current_origin = destination_origin;
this.interpretation = interpretation;
this.manifestation = manifestation;
this.mimetype = mimetype;
this.text = text;
this.storage = storage;
}
/**
* Create a new Subject structure from predefined {@link GLib.Variant} data
*
* @param subject_variant A {@link GLib.Variant} decscribing the subject data.
*
* @return A newly create {@link Subject} instance. The returned subject will
* have a floating reference which will be consumed if you pass the
* event to any of the methods provided by this library (like
* adding it to an event).
*/
public Subject.from_variant (Variant subject_variant)
throws DataModelError
{
VariantIter iter = subject_variant.iterator();
var subject_props = iter.n_children ();
Utils.assert_sig (subject_props >= 7, "Missing subject information");
uri = next_string_or_null (iter);
interpretation = next_string_or_null (iter);
manifestation = next_string_or_null (iter);
origin = next_string_or_null (iter);
mimetype = next_string_or_null (iter);
text = next_string_or_null (iter);
storage = next_string_or_null (iter);
// let's keep this compatible with older clients
if (subject_props >= 8)
current_uri = next_string_or_null (iter);
if (subject_props >= 9)
current_origin = next_string_or_null (iter);
}
public Variant to_variant ()
{
/* The FAST version */
char* ptr_arr[9];
ptr_arr[0] = uri != null ? uri : "";
ptr_arr[1] = interpretation != null ? interpretation : "";
ptr_arr[2] = manifestation != null ? manifestation : "";
ptr_arr[3] = origin != null ? origin : "";
ptr_arr[4] = mimetype != null ? mimetype : "";
ptr_arr[5] = text != null ? text : "";
ptr_arr[6] = storage != null ? storage : "";
ptr_arr[7] = current_uri != null ? current_uri : "";
ptr_arr[8] = current_origin != null ? current_origin : "";
return new Variant.strv ((string[]) ptr_arr);
/* The NICE version */
/*
var vb = new VariantBuilder (new VariantType ("as"));
vb.add ("s", uri ?? "");
vb.add ("s", interpretation ?? "");
vb.add ("s", manifestation ?? "");
vb.add ("s", origin ?? "");
vb.add ("s", mimetype ?? "");
vb.add ("s", text ?? "");
vb.add ("s", storage ?? "");
vb.add ("s", current_uri ?? "");
vb.add ("s", current_origin ?? "");
return vb.end ();
*/
}
/**
* @return true if this Subject matches *subject_template*. Empty
* fields in the template are treated as wildcards.
* Interpretations and manifestations are also matched if they are
* children of the types specified in `subject_template`.
* @param template_subject a {@link Subject}
*/
public bool matches_template (Subject template_subject)
{
if (!check_field_match (this.uri, template_subject.uri, false, true))
return false;
if (!check_field_match (this.current_uri, template_subject.current_uri, false, true))
return false;
if (!check_field_match (this.interpretation, template_subject.interpretation, true))
return false;
if (!check_field_match (this.manifestation, template_subject.manifestation, true))
return false;
if (!check_field_match (this.origin, template_subject.origin, false, true))
return false;
if (!check_field_match (this.current_origin, template_subject.current_origin, false, true))
return false;
if (!check_field_match (this.mimetype, template_subject.mimetype, false, true))
return false;
return true;
}
}
}
// vim:expandtab:ts=4:sw=4
|
