1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
namespace SetWallpaperContractor {
const int DEFAULT_TRANSITION_DURATION = 1;
const string SLIDESHOW_FILENAME = "slideshow.xml";
const string SLIDESHOW_TEMPLATE = """
<background>
%s
</background>""";
const string SLIDESHOW_WALLPAPER_TEMPLATE = """
<static>
<duration>%i</duration>
<file>%s</file>
</static>
<transition>
<duration>%i</duration>
<from>%s</from>
<to>%s</to>
</transition>
""";
const string SYSTEM_BACKGROUNDS_PATH = "/usr/share/backgrounds";
private int delay_value = 60;
[DBus (name = "org.freedesktop.Accounts.User")]
interface AccountsServiceUser : Object {
public abstract void set_background_file (string filename) throws IOError;
}
private void update_slideshow (string path, List<File> files, int duration) {
var wallpapers = "";
var len = files.length ();
for (var i = 0; i < len; i++) {
var slide = files.nth_data (i).get_path ();
var next_slide = files.nth_data (i - 1 == len ? 0 : i).get_path ();
wallpapers += SLIDESHOW_WALLPAPER_TEMPLATE.printf (duration, slide,
DEFAULT_TRANSITION_DURATION, slide, next_slide);
}
var slideshow = SLIDESHOW_TEMPLATE.printf (wallpapers);
try {
FileUtils.set_contents (path, slideshow);
} catch (Error e) {
error (e.message);
}
set_settings_key ("file://" + path);
}
private void set_settings_key (string uri) {
var settings = new Settings ("org.gnome.desktop.background");
settings.set_string ("picture-uri", uri);
settings.apply ();
Settings.sync ();
}
private void delay_value_changed (Gtk.Scale duration_scale, Gtk.Label duration_label) {
double value = duration_scale.adjustment.value;
// f(x)=x^5 allows to have fine-grained values (seconds) to the left
// and very coarse-grained values (hours) to the right of the slider.
// We limit maximum value to 1 day and minimum to 5 seconds.
delay_value = (int) (Math.pow (value, 5) / Math.pow (90, 5) * 60 * 60 * 24 + 5);
// convert to text and remove fractions from values > 1 minute
string text;
if (delay_value < 60) {
text = ngettext ("%d second", "%d seconds", delay_value).printf (delay_value);
} else if (delay_value < 60 * 60) {
int minutes = delay_value / 60;
text = ngettext ("%d minute", "%d minutes", minutes).printf (minutes);
delay_value = minutes * 60;
} else if (delay_value < 60 * 60 * 24) {
int hours = delay_value / (60 * 60);
text = ngettext ("%d hour", "%d hours", hours).printf (hours);
delay_value = hours * (60 * 60);
} else {
text = _("1 day");
delay_value = 60 * 60 * 24;
}
duration_label.set_markup (_("Show each photo for") + " <b>" + text + "</b>");
}
private string get_local_bg_location () {
return Path.build_filename (Environment.get_user_data_dir (), "backgrounds") + "/";
}
private File ensure_local_bg_exists () {
var folder = File.new_for_path (get_local_bg_location ());
if (!folder.query_exists ()) {
try {
folder.make_directory_with_parents ();
} catch (Error e) {
warning ("%s\n", e.message);
}
}
return folder;
}
private File? copy_for_library (File source) {
File? dest = null;
try {
dest = File.new_for_path (get_local_bg_location () + source.get_basename ());
source.copy (dest, FileCopyFlags.OVERWRITE | FileCopyFlags.ALL_METADATA);
} catch (Error e) {
warning ("%s\n", e.message);
}
return dest;
}
private File? copy_for_greeter (File source) {
File? dest = null;
try {
string greeter_data_dir = Path.build_filename (Environment.get_variable ("XDG_GREETER_DATA_DIR"), "wallpaper");
var folder = File.new_for_path (greeter_data_dir);
if (folder.query_exists ()) {
var enumerator = folder.enumerate_children ("standard::*", FileQueryInfoFlags.NOFOLLOW_SYMLINKS);
FileInfo? info = null;
while ((info = enumerator.next_file ()) != null) {
enumerator.get_child (info).@delete ();
}
} else {
folder.make_directory_with_parents ();
}
dest = File.new_for_path (Path.build_filename (greeter_data_dir, source.get_basename ()));
source.copy (dest, FileCopyFlags.OVERWRITE | FileCopyFlags.ALL_METADATA);
} catch (Error e) {
warning ("%s\n", e.message);
return null;
}
return dest;
}
public static int main (string[] args) {
Gtk.init (ref args);
AccountsServiceUser? accounts_service = null;
try {
string uid = "%d".printf ((int) Posix.getuid ());
accounts_service = Bus.get_proxy_sync (BusType.SYSTEM,
"org.freedesktop.Accounts",
"/org/freedesktop/Accounts/User" + uid);
} catch (Error e) {
warning ("%s\n", e.message);
}
var folder = ensure_local_bg_exists ();
var files = new List<File> ();
for (var i = 1; i < args.length; i++) {
var file = File.new_for_path (args[i]);
if (file != null) {
string path = file.get_path ();
File append_file = file;
if (!path.has_prefix (SYSTEM_BACKGROUNDS_PATH) && !path.has_prefix (get_local_bg_location ())) {
var local_file = copy_for_library (file);
if (local_file != null) {
append_file = local_file;
}
}
files.append (append_file);
var greeter_file = copy_for_greeter (file);
if (greeter_file != null) {
path = greeter_file.get_path ();
}
try {
accounts_service.set_background_file (path);
} catch (Error e) {
warning ("%s\n", e.message);
}
}
}
if (files.length () < 1) {
warning ("No images specified, aborting.\n");
return 1;
}
if (files.length () == 1) {
set_settings_key (files.data.get_uri ());
return 0;
}
var dialog = new Gtk.Dialog.with_buttons (_("Set As Desktop Slideshow"), null, 0);
dialog.deletable = false;
dialog.add_button (_("Cancel"), Gtk.ResponseType.CANCEL);
dialog.add_button (_("Create slideshow"), Gtk.ResponseType.OK);
var icon = new Gtk.Image.from_icon_name ("preferences-desktop-wallpaper", Gtk.IconSize.DIALOG);
var title = new Gtk.Label (_("Set As Desktop Slideshow"));
title.get_style_context ().add_class ("primary");
title.xalign = 0;
var label = new Gtk.Label ("");
label.xalign = 0;
var duration = new Gtk.Scale.with_range (Gtk.Orientation.HORIZONTAL, 0, 100, 10);
duration.draw_value = false;
duration.hexpand = true;
duration.value_changed.connect (() => delay_value_changed (duration, label));
duration.set_value (50);
var grid = new Gtk.Grid ();
grid.column_spacing = 12;
grid.row_spacing = 6;
grid.margin = 12;
grid.margin_top = 0;
grid.attach (icon, 0, 0, 1, 2);
grid.attach (title, 1, 0, 1, 1);
grid.attach (label, 1, 1, 1, 1);
grid.attach (duration, 1, 2, 1, 1);
dialog.set_default_response (Gtk.ResponseType.OK);
dialog.get_content_area ().add (grid);
dialog.get_action_area ().margin = 4;
dialog.show_all ();
if (dialog.run () == Gtk.ResponseType.OK) {
dialog.destroy ();
var path = folder.get_child (SLIDESHOW_FILENAME).get_path ();
update_slideshow (path, files, delay_value);
return 0;
}
return 1;
}
}
|