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/* Copyright 2016 Software Freedom Conservancy Inc.
*
* This software is licensed under the GNU Lesser General Public License
* (version 2.1 or later). See the COPYING file in this distribution.
*/
public class MediaViewTracker : Core.ViewTracker {
public MediaAccumulator all = new MediaAccumulator();
public MediaAccumulator visible = new MediaAccumulator();
public MediaAccumulator selected = new MediaAccumulator();
public MediaViewTracker(ViewCollection collection) {
base (collection);
start(all, visible, selected);
}
}
public class MediaAccumulator : Object, Core.TrackerAccumulator {
public int total = 0;
public int photos = 0;
public int videos = 0;
public int raw = 0;
public int flagged = 0;
public bool include(DataObject object) {
DataSource source = ((DataView) object).get_source();
total++;
Photo? photo = source as Photo;
if (photo != null) {
if (photo.get_master_file_format() == PhotoFileFormat.RAW) {
raw++;
}
if (photo.get_master_file_format() != PhotoFileFormat.RAW ||
photo.is_raw_developer_available(RawDeveloper.CAMERA)) {
photos++;
}
} else if (source is VideoSource) {
videos++;
}
Flaggable? flaggable = source as Flaggable;
if (flaggable != null && flaggable.is_flagged())
flagged++;
// because of total, always fire "updated"
return true;
}
public bool uninclude(DataObject object) {
DataSource source = ((DataView) object).get_source();
if (total < 1) {
warning("Tried to remove DataObject %s from empty %s (%s)".printf(object.to_string(),
get_type().name(), to_string()));
return false;
}
total--;
Photo? photo = source as Photo;
if (photo != null) {
if (photo.get_master_file_format() == PhotoFileFormat.RAW) {
assert(raw > 0);
raw--;
}
if (photo.get_master_file_format() != PhotoFileFormat.RAW ||
photo.is_raw_developer_available(RawDeveloper.CAMERA)) {
assert(photos > 0);
photos--;
}
} else if (source is Video) {
assert(videos > 0);
videos--;
}
Flaggable? flaggable = source as Flaggable;
if (flaggable != null && flaggable.is_flagged()) {
assert(flagged > 0);
flagged--;
}
// because of total, always fire "updated"
return true;
}
public bool altered(DataObject object, Alteration alteration) {
// the only alteration that can happen to MediaSources this accumulator is concerned with is
// flagging; typeness and raw-ness don't change at runtime
if (!alteration.has_detail("metadata", "flagged"))
return false;
Flaggable? flaggable = ((DataView) object).get_source() as Flaggable;
if (flaggable == null)
return false;
if (flaggable.is_flagged()) {
flagged++;
} else {
assert(flagged > 0);
flagged--;
}
return true;
}
public string to_string() {
return "%d photos/%d videos/%d raw/%d flagged".printf(photos, videos, raw, flagged);
}
}
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