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/* Copyright 2009-2014 Yorba Foundation
*
* 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 DirectPhoto : Photo {
private const int PREVIEW_BEST_FIT = 360;
public static DirectPhotoSourceCollection global = null;
public signal void can_rotate_changed(bool b);
private Gdk.Pixbuf preview = null;
private bool loaded = false;
private DirectPhoto(PhotoRow row) {
base (row);
}
/**
* @brief Because all transformations are discarded on reimport by design, including
* Orientation, a JFIF file that is only rotated or flipped, then saved, has the orientation
* change the user made before saving removed (recall that fetch() remembers which images it
* has seen before and will only add a file to the file map once; every time it sees it
* again after this is considered a reimport). This will set the orientation to the
* specified value, fixing up both the row and the backing row.
*
* @warning Only reimported JFIF files should need this; non-lossy image types have their
* actual pixels physically rotated in the file when they're exported.
*
* @param dest The orientation to set the photo to; usually, this should be a value
* obtained by calling get_orientation() prior to export()ing a DirectPhoto.
*/
public void fixup_orientation_after_reimport(Orientation dest) {
row.orientation = dest;
backing_photo_row.original_orientation = dest;
}
public static void init(File initial_file) {
init_photo();
global = new DirectPhotoSourceCollection(initial_file);
DirectPhoto photo;
string? reason = global.fetch(initial_file, out photo, false);
if (reason != null)
warning("fetch error: %s", reason);
global.add(photo);
}
public static void terminate() {
terminate_photo();
}
// Gets the dimensions of this photo's pixbuf when scaled to original
// size and saves them where get_raw_dimensions can find them.
private void save_dims() {
try {
backing_photo_row.dim = Dimensions.for_pixbuf(get_pixbuf_with_options(Scaling.for_original(),
Exception.CROP | Exception.STRAIGHTEN | Exception.ORIENTATION));
} catch (Error e) {
warning("Dimensions for image %s could not be gotten.", to_string());
}
}
// Loads a photo on demand.
public ImportResult demand_load() {
if (loaded) {
save_dims();
return ImportResult.SUCCESS;
}
Photo.ReimportMasterState reimport_state;
try {
prepare_for_reimport_master(out reimport_state);
finish_reimport_master(reimport_state);
} catch (Error err) {
warning("Database error on re-importing image: %s", err.message);
return ImportResult.DATABASE_ERROR;
}
loaded = true;
save_dims();
return ImportResult.SUCCESS;
}
// This method should only be called by DirectPhotoSourceCollection. Use
// DirectPhoto.global.fetch to import files into the system.
public static ImportResult internal_import(File file, out DirectPhoto photo) {
PhotoImportParams params = new PhotoImportParams.create_placeholder(file, ImportID.generate());
Photo.create_pre_import(params);
PhotoTable.get_instance().add(params.row);
photo = new DirectPhoto(params.row);
return ImportResult.SUCCESS;
}
public override Gdk.Pixbuf get_preview_pixbuf(Scaling scaling) throws Error {
if (preview == null) {
preview = get_thumbnail(PREVIEW_BEST_FIT);
if (preview == null)
preview = get_pixbuf(scaling);
}
return scaling.perform_on_pixbuf(preview, Gdk.InterpType.BILINEAR, true);
}
public override void rotate(Rotation rotation) {
can_rotate_now = false;
can_rotate_changed(false);
base.rotate(rotation);
}
public override Gdk.Pixbuf get_pixbuf(Scaling scaling) throws Error {
Gdk.Pixbuf ret = base.get_pixbuf(scaling);
can_rotate_changed(true);
can_rotate_now = true;
return ret;
}
public override Gdk.Pixbuf? get_thumbnail(int scale) throws Error {
return (get_metadata().get_preview_count() == 0) ? null :
get_orientation().rotate_pixbuf(get_metadata().get_preview(0).get_pixbuf());
}
protected override void notify_altered(Alteration alteration) {
preview = null;
base.notify_altered(alteration);
}
protected override bool has_user_generated_metadata() {
// TODO: implement this method
return false;
}
protected override void set_user_metadata_for_export(PhotoMetadata metadata) {
// TODO: implement this method, see ticket
}
protected override void apply_user_metadata_for_reimport(PhotoMetadata metadata) {
}
public override bool is_trashed() {
// always returns false -- direct-edit mode has no concept of the trash can
return false;
}
public override bool is_offline() {
// always returns false -- direct-edit mode has no concept of offline photos
return false;
}
public override void trash() {
// a no-op -- direct-edit mode has no concept of the trash can
}
public override void untrash() {
// a no-op -- direct-edit mode has no concept of the trash can
}
public override void mark_offline() {
// a no-op -- direct-edit mode has no concept of offline photos
}
public override void mark_online() {
// a no-op -- direct-edit mode has no concept of offline photos
}
}
public class DirectPhotoSourceCollection : DatabaseSourceCollection {
private const int DISCOVERED_FILES_BATCH_ADD = 500;
private Gee.Collection<DirectPhoto> prepared_photos = new Gee.ArrayList<DirectPhoto>();
private Gee.HashMap<File, DirectPhoto> file_map = new Gee.HashMap<File, DirectPhoto>(file_hash,
file_equal);
private DirectoryMonitor monitor;
public DirectPhotoSourceCollection(File initial_file) {
base("DirectPhotoSourceCollection", get_direct_key);
// only use the monitor for discovery in the specified directory, not its children
monitor = new DirectoryMonitor(initial_file.get_parent(), false, false);
monitor.file_discovered.connect(on_file_discovered);
monitor.discovery_completed.connect(on_discovery_completed);
monitor.start_discovery();
}
public override bool holds_type_of_source(DataSource source) {
return source is DirectPhoto;
}
private static int64 get_direct_key(DataSource source) {
DirectPhoto photo = (DirectPhoto) source;
PhotoID photo_id = photo.get_photo_id();
return photo_id.id;
}
public override void notify_items_added(Gee.Iterable<DataObject> added) {
foreach (DataObject object in added) {
DirectPhoto photo = (DirectPhoto) object;
File file = photo.get_file();
assert(!file_map.has_key(file));
file_map.set(file, photo);
}
base.notify_items_added(added);
}
public override void notify_items_removed(Gee.Iterable<DataObject> removed) {
foreach (DataObject object in removed) {
DirectPhoto photo = (DirectPhoto) object;
File file = photo.get_file();
bool is_removed = file_map.unset(file);
assert(is_removed);
}
base.notify_items_removed(removed);
}
public bool has_source_for_file(File file) {
return file_map.has_key(file);
}
private void on_file_discovered(File file, FileInfo info) {
// skip already-seen files
if (has_source_for_file(file))
return;
// only add files that look like photo files we support
if (!PhotoFileFormat.is_file_supported(file))
return;
DirectPhoto photo;
string? reason = fetch(file, out photo, false);
if (reason != null)
warning("Error fetching file: %s", reason);
prepared_photos.add(photo);
if (prepared_photos.size >= DISCOVERED_FILES_BATCH_ADD)
flush_prepared_photos();
}
private void on_discovery_completed() {
flush_prepared_photos();
}
private void flush_prepared_photos() {
add_many(prepared_photos);
prepared_photos.clear();
}
public bool has_file(File file) {
return file_map.has_key(file);
}
public void reimport_photo(DirectPhoto photo) {
photo.discard_prefetched();
DirectPhoto reimported_photo;
fetch(photo.get_file(), out reimported_photo, true);
}
// Returns an error string if unable to fetch, null otherwise
public string? fetch(File file, out DirectPhoto photo, bool reimport) {
// fetch from the map first, which ensures that only one DirectPhoto exists for each file
photo = file_map.get(file);
if (photo != null) {
string? reason = null;
if (reimport) {
try {
Orientation ori_tmp = Orientation.TOP_LEFT;
bool should_restore_ori = false;
if ((photo.only_metadata_changed()) ||
(photo.get_file_format() == PhotoFileFormat.JFIF)) {
ori_tmp = photo.get_orientation();
should_restore_ori = true;
}
Photo.ReimportMasterState reimport_state;
if (photo.prepare_for_reimport_master(out reimport_state)) {
photo.finish_reimport_master(reimport_state);
if (should_restore_ori) {
photo.fixup_orientation_after_reimport(ori_tmp);
}
}
else {
reason = ImportResult.FILE_ERROR.to_string();
}
} catch (Error err) {
reason = err.message;
}
}
return reason;
}
// for DirectPhoto, a fetch on an unknown file is an implicit import into the in-memory
// database (which automatically adds the new DirectPhoto object to DirectPhoto.global)
ImportResult result = DirectPhoto.internal_import(file, out photo);
return (result == ImportResult.SUCCESS) ? null : result.to_string();
}
public bool has_file_source(File file) {
return file_map.has_key(file);
}
public DirectPhoto? get_file_source(File file) {
return file_map.get(file);
}
}
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