Hacking\015\012\015\012The following information is for people who are interested in subtle's internals and/or like to play around and extend subtle. If you have problems with a certain client or discover an odd behaviour, feel free to add to the blamelist.\015\012\015\012{{>toc}}\015\012\015\012h2. RDoc documentation\015\012\015\012The latest rdoc documention can either be found here or be generated from the source tree:\015\012\015\012

rake rdoc

\015\012\015\012h2. Unit testing\015\012\015\012Testing a window manager is a difficult task, currently the unit tests consist of a bunch of riot contexts and a script to run Xvfb# riot# Xvfb# xterm tests:\015\012\015\012

cd test\015\012ruby ./xserver.rb &\015\012ruby ./test.rb\015\012\015\012...\015\012\015\01268 passes, 0 failures, 0 errors in 18.540124 seconds\015\012

\015\012\015\012h2. Loglevel\015\012\015\012subtle uses a loglevel system to distinguish between messages and to be able to turn certain messages off. \015\012\015\012Following levels exist:\015\012\015\012|_. Name |_. Messages |\015\012| warnings | Warning messages |\015\012| error | Error messages |\015\012| deprecated | Deprecation warnings |\015\012| events | Information about handled events |\015\012| ruby | Ruby debugging messages |\015\012| xerror | X11 error messages |\015\012| subtlext | Debugging messages of subtlext |\015\012| subtle | Subsystem messages of subtle |\015\012| debug | General debugging messages |\015\012\015\012The level can be set with the -l or --level= options, multiple values are comma separated without any whitespace.\015\012\015\012

subtle -l ruby,subtlext\015\012subtle --level=ruby,subtlext\015\012

\015\012\015\012h2. EWMH/ICCCM specifications\015\012\015\012Here are all EWMH/NetWM properties listed, that are supported by subtle and subtlext.\015\012\015\012h3. Default\015\012\015\012h4. NET_NUMBER_OF_DESKTOPS\015\012\015\012Get the number of views.\015\012\015\012top\015\012\015\012h4. _NET_DESKTOP_NAMES\015\012\015\012Get a list of all view names.\015\012\015\012top\015\012\015\012h4. _NET_CURRENT_DESKTOP\015\012\015\012Change or get current desktop\015\012

\015\012data.l[0] = <View id>\015\012data.l[1] = <Timestamp>\015\012data.l[2] = <Screen id>\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012Set current desktop (view) on given screen.\015\012\015\012*Screen id*: subtle extension\015\012\015\012top\015\012\015\012h4. _NET_RESTACK_WINDOW\015\012\015\012Change stacking of window\015\012

\015\012data.l[0] = <Ignored>\015\012data.l[1] = <Client id>\015\012data.l[2] = <Detail>\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012*Detail*: 0 = Above (raise), 1 = Below (lower)\015\012\015\012top\015\012\015\012h4. _NET_MOVERESIZE_WINDOW\015\012\015\012Resize window\015\012

\015\012data.l[0] = <Ignored>\015\012data.l[1] = <x>\015\012data.l[2] = <y>\015\012data.l[3] = <width>\015\012data.l[4] = <height>\015\012

\015\012\015\012Move/resize a window.\015\012\015\012top\015\012\015\012h4. _NET_CLOSE_WINDOW\015\012\015\012Close client window\015\012

\015\012data.l[0] = <Timestamp>\015\012data.l[1] = <Ignored>\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012Ask subtle to close a window.\015\012\015\012top\015\012\015\012h3. WM State\015\012\015\012Normally there are three types of actions: remove (0), add (1) and toggle (2), but we _always toggle the states independent of the supplied action. The second property will be ignored.\015\012\015\012h4. NET_WM_STATE_FULLSCREEN\015\012\015\012Toggle client fullscreen\015\012

\015\012data.l[0] = <Action>\015\012data.l[1] = _NET_WM_STATE_FULLSCREEN\015\012data.l[2] = <Ignored>\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012Set fullscreen state of a window.\015\012\015\012top\015\012\015\012h4. _NET_WM_STATE_ABOVE\015\012\015\012Toggle client float\015\012

\015\012data.l[0] = <Action>\015\012data.l[1] = _NET_WM_STATE_ABOVE\015\012data.l[2] = <Ignored>\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012Set floating state of a window.\015\012\015\012top\015\012\015\012h4. _NET_WM_STATE_STICKY\015\012\015\012Toggle client urgent\015\012

\015\012data.l[0] = <Action>\015\012data.l[1] = _NET_WM_STATE_STICKY\015\012data.l[2] = <Ignored>\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012Set sticky mode of a window.\015\012\015\012top\015\012\015\012h4. _NET_WM_STATE_DEMANDS_ATTENTION\015\012\015\012Toggle client urgent\015\012

\015\012data.l[0] = <Action>\015\012data.l[1] = _NET_WM_STATE_DEMANDS_ATTENTION\015\012data.l[2] = <Ignored>\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012Set urgency of a window.\015\012\015\012top\015\012\015\012h3. XEmbed\015\012\015\012h4. MANAGER\015\012\015\012Inform clients about a new selection manager.\015\012\015\012top\015\012\015\012h5. _NET_SYSTEM_TRAY_OPCODE\015\012\015\012Used for communication between embedder and client.\015\012\015\012top\015\012\015\012h5. _NET_SYSTEM_TRAY_MESSAGE_DATA\015\012\015\012Used for communication between embedder and client.\015\012\015\012top\015\012\015\012h5. _NET_SYSTEM_TRAY_S\015\012\015\012Screen tray selection.\015\012\015\012top\015\012\015\012h4. _XEMBED\015\012\015\012h5. _XEMBED_INFO\015\012\015\012XEmbed protocol info.\015\012\015\012top\015\012\015\012h5. XEMBED_EMBEDDED_NOTIFY\015\012\015\012Notification to start embedding cycle.\015\012\015\012top\015\012\015\012h5. XEMBED_WINDOW_ACTIVATE\015\012\015\012NormalState for embedded clients.\015\012\015\012top\015\012\015\012h5. XEMBED_WINDOW_DEACTIVATE\015\012\015\012WithdrawnState for embedded clients.\015\012\015\012top\015\012\015\012h5. XEMBED_REQUEST_FOCUS\015\012\015\012Notification of the client for embedder to pass focus.\015\012\015\012top\015\012\015\012h5. XEMBED_FOCUS_IN\015\012\015\012Notification when client can take focus.\015\012\015\012top\015\012\015\012h5. XEMBED_FOCUS_OUT\015\012\015\012Notification when client lost focus.\015\012\015\012top\015\012\015\012h3. Subtle extension\015\012\015\012h4. SUBTLE_WINDOW_TAGS\015\012\015\012Change either tags of a window (Client or View) or get a list of available tags from root window.\015\012

\015\012data.l[0] = <Client id>\015\012data.l[1] = <Tag bitmask>\015\012data.l[2] = <Type>\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012*Type*: 0 = Client, 1 = View\015\012\015\012top\015\012\015\012h4. SUBTLE_WINDOW_GRAVITY\015\012\015\012Set client window gravity\015\012

\015\012data.l[0] = <Client id>\015\012data.l[1] = <Gravity type>\015\012data.l[2] = <Gravity mode>\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_WINDOW_FLAGS\015\012\015\012Set client flags\015\012

\015\012data.l[0] = <Client id>\015\012data.l[1] = <Flags>\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012The bits in flags have the following meaning:\015\012\015\012| Bit | Description |\015\012| 1 | Fullscreen | \015\012| 2 | Floating |\015\012| 3 | Sticky |\015\012| 4 | Resize |\015\012\015\012top\015\012\015\012h4. SUBTLE_GRAVITY_NEW\015\012\015\012Create a new gravity mode\015\012

\015\012data.b[0-20] = <Gravity x>x<Gravity y>+<Gravity width>+<Gravity height>#<Gravity name>\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_GRAVITY_LIST\015\012\015\012Get a gravity mode list\015\012\015\012top\015\012\015\012h4. SUBTLE_GRAVITY_KILL\015\012\015\012Kill a gravity\015\012

\015\012data.l[0] = <Gravity id>\015\012data.l[1] = 0\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_TAG_NEW\015\012\015\012Create a new tag\015\012

\015\012data.b[0-20] = <Tag name>\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_TAG_LIST\015\012\015\012Get a tag list\015\012\015\012top\015\012\015\012h4. SUBTLE_TAG_KILL\015\012\015\012Kill a tag\015\012

\015\012data.l[0] = <Tag id>\015\012data.l[1] = 0\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_VIEW_NEW\015\012\015\012Create a new view\015\012

\015\012data.b[0-20] = <View name>\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_VIEW_KILL\015\012\015\012Kill a view\015\012

\015\012data.l[0] = <View id>\015\012data.l[1] = 0\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_SUBLET_NEW\015\012\015\012Load a sublet from _$XDG_DATA_HOME/subtle/sublets\015\012

\015\012data.b[0-20] = <Sublet filename>\015\012

\015\012\015\012h4. SUBTLE_SUBLET_UPDATE\015\012\015\012Force update of a sublet\015\012

\015\012data.l[0] = <Sublet id>\015\012data.l[1] = 0\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_SUBLET_DATA\015\012\015\012Set data field of sublet\015\012

\015\012data.l[0] = <Sublet id>\015\012

\015\012\015\012After receiving of this client message, subtle checkes the SUBTLE_DATA property on the root display and copies the data.\015\012\015\012top\015\012\015\012h4. SUBTLE_SUBLET_LIST\015\012\015\012Get sublet list\015\012\015\012top\015\012\015\012h4. SUBTLE_SUBLET_KILL\015\012\015\012Kill a sublet\015\012

\015\012data.l[0] = <Sublet id>\015\012data.l[1] = 0\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_SCREEN_VIEWS\015\012\015\012List of views in screen order that are visible.\015\012\015\012top\015\012\015\012h4. SUBTLE_VISIBLE_TAGS\015\012\015\012Bitfield of all visible tags on all screens.\015\012\015\012top\015\012\015\012h4. SUBTLE_VISIBLE_VIEWS\015\012\015\012Bitfield of all visible views on all screens.\015\012\015\012top\015\012\015\012h4. SUBTLE_RELOAD\015\012\015\012Force reload of config and sublets.\015\012

\015\012data.l[0] = 0\015\012data.l[1] = 0\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_RESTART\015\012\015\012Force full restart.\015\012

\015\012data.l[0] = 0\015\012data.l[1] = 0\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_QUIT\015\012\015\012Force quit.\015\012

\015\012data.l[0] = 0\015\012data.l[1] = 0\015\012data.l[2] = 0\015\012data.l[3] = 0\015\012data.l[4] = 0\015\012

\015\012\015\012top\015\012\015\012h4. SUBTLE_COLORS\015\012\015\012Get a color list.\015\012\015\012h4. SUBTLE_DATA\015\012\015\012Property to exchange data.\015\012\015\012top\015\012¶