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/***
Copyright (C) 2012 ammonkey <am.monkeyd@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 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 General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
namespace Marlin.View {
public class OverlayBar : Granite.Widgets.OverlayBar {
private Marlin.View.Window window;
const int IMAGE_LOADER_BUFFER_SIZE = 8192;
const int STATUS_UPDATE_DELAY = 200;
const string[] SKIP_IMAGES = {"image/svg+xml", "image/tiff"};
Cancellable? image_cancellable = null;
bool image_size_loaded = false;
private uint folders_count = 0;
private uint files_count = 0;
private uint64 files_size = 0;
private GOF.File? goffile = null;
private GLib.List<unowned GOF.File>? selected_files = null;
private uint8 [] buffer;
private GLib.FileInputStream? stream;
private Gdk.PixbufLoader loader;
private uint update_timeout_id = 0;
public bool showbar = false;
public OverlayBar (Marlin.View.Window win, Gtk.Overlay overlay) {
base (overlay); /* this adds the overlaybar to the overlay (ViewContainer) */
buffer = new uint8[IMAGE_LOADER_BUFFER_SIZE];
status = "";
window = win;
window.selection_changed.connect (on_selection_changed);
hide.connect (() => {
/* when we're hiding, we no longer want to search for image size */
if (image_cancellable != null)
image_cancellable.cancel ();
});
}
private void on_selection_changed (GLib.List<GOF.File>? files = null) {
if (files != null)
selected_files = files.copy ();
else
selected_files = null;
real_update (selected_files);
}
public void reset_selection () {
selected_files = null;
}
public void update_hovered (GOF.File? file) {
if (!showbar)
return;
cancel_update ();
visible = false;
update_timeout_id = GLib.Timeout.add_full (GLib.Priority.LOW, STATUS_UPDATE_DELAY, () => {
GLib.List<GOF.File> list = null;
if (file != null) {
bool matched = false;
if (selected_files != null) {
selected_files.@foreach ((f) => {
if (f == file)
matched = true;
});
}
if (matched)
real_update (selected_files);
else {
list.prepend (file);
real_update (list);
}
} else
real_update (null);
update_timeout_id = 0;
return false;
});
}
public void cancel_update () {
if (update_timeout_id > 0) {
GLib.Source.remove (update_timeout_id);
update_timeout_id = 0;
}
}
private void real_update (GLib.List<GOF.File>? files) {
goffile = null;
folders_count = 0;
files_count = 0;
files_size = 0;
status = "";
if (files != null) {
if (files.data != null) {
if (files.next == null)
/* list contain only one element */
goffile = files.first ().data;
else
scan_list (files);
status = update_status ();
}
}
visible = showbar && (status.length > 0);
}
private string update_status () {
/* if we're still collecting image info, cancel */
if (image_cancellable != null) {
image_cancellable.cancel ();
image_cancellable = null;
}
string str = "";
if (goffile != null) { /* a single file is hovered or selected */
if (goffile.is_network_uri_scheme ()) {
str = goffile.get_display_target_uri ();
} else if (!goffile.is_folder ()) {
/* if we have an image, see if we can get its resolution */
string? type = goffile.get_ftype ();
if (type != null && type.substring (0, 6) == "image/" && !(type in SKIP_IMAGES)) {
load_resolution.begin (goffile);
}
str = "%s (%s)".printf (goffile.formated_type, format_size ((int64) PropertiesWindow.file_real_size (goffile)));
} else {
str = "%s - %s".printf (goffile.info.get_name (), goffile.formated_type);
}
} else { /* hovering over multiple selection */
if (folders_count > 1) {
str = _("%u folders").printf (folders_count);
if (files_count > 0)
str += ngettext (_(" and %u other item (%s) selected").printf (files_count, format_size ((int64) files_size)),
_(" and %u other items (%s) selected").printf (files_count, format_size ((int64) files_size)),
files_count);
else
str += _(" selected");
} else if (folders_count == 1) {
str = _("%u folder").printf (folders_count);
if (files_count > 0)
str += ngettext (_(" and %u other item (%s) selected").printf (files_count, format_size ((int64) files_size)),
_(" and %u other items (%s) selected").printf (files_count, format_size ((int64) files_size)),
files_count);
else
str += _(" selected");
} else /* folder_count = 0 and files_count > 0 */
str = _("%u items selected (%s)").printf (files_count, format_size ((int64) files_size));
}
return str;
}
private void scan_list (GLib.List<GOF.File>? files) {
if (files == null)
return;
foreach (var gof in files) {
if (gof.is_folder ()) {
folders_count++;
} else {
files_count++;
files_size += PropertiesWindow.file_real_size (gof);
}
}
}
/* code is mostly ported from nautilus' src/nautilus-image-properties.c */
private async void load_resolution (GOF.File goffile) {
var file = goffile.location;
image_size_loaded = false;
image_cancellable = new Cancellable ();
try {
stream = yield file.read_async (0, image_cancellable);
if (stream == null)
error ("Could not read image file's size data");
loader = new Gdk.PixbufLoader.with_mime_type (goffile.get_ftype ());
loader.size_prepared.connect ((width, height) => {
image_size_loaded = true;
status = "%s (%s — %i × %i)".printf (goffile.formated_type, goffile.format_size, width, height);
});
/* Gdk wants us to always close the loader, so we are nice to it */
image_cancellable.cancelled.connect (() => {
try {
loader.close ();
stream.close ();
} catch (Error e) {}
});
yield read_image_stream (loader, stream, image_cancellable);
} catch (Error e) { debug (e.message); }
}
private async void read_image_stream (Gdk.PixbufLoader loader, FileInputStream stream, Cancellable cancellable)
{
ssize_t read = 1;
while (!image_size_loaded && read > 0) {
try {
read = yield stream.read_async (buffer, 0, cancellable);
loader.write (buffer);
} catch (IOError e) {
if (!(e is IOError.CANCELLED))
warning (e.message);
} catch (Gdk.PixbufError e) {
/* errors while loading are expected, we only need to know the size */
} catch (FileError e) {
warning (e.message);
} catch (Error e) {
warning (e.message);
}
}
image_cancellable.cancelled ();
}
}
}
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