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Luboš Luňák 73e6f75ab7 _NET_NUMBER_OF_DESKTOPS is ok now 
svn path=/trunk/kdebase/kwin/; revision=196975
2003-01-02 14:41:22 +00:00

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W A R N I N G:
--------------
This document is a work in progress and is in no way complete or accurate!
Its current purpose is in aiding the KWin NetWM audit for a future KWin release.
NetWM Compliance Document:
==========================
Listed below are all the NetWM (or EWM) hints decided upon on freedesktop.org
(as of version 1.3draft, Nov 27, 2002) and KWin's current level of
compliance with the spec. Some parts also involve the pager and clients which
this document will cater for as well where applicable.
If you modify the level of NetWM compliance (via modification of kwin/*,
kdecore/netwm.* or kdecore/kwin.* etc.), or notice any new hints that
were added after version 1.2, please modify this document appropriately.
Properties are ordered in the table in the order they are found in the
specification. To list any important notes regarding a property, just
add them as follows:
_NET_NUMBER_OF_DESKTOPS root window property done
+----------------------------------------------------------------+
| This property SHOULD be updated by the Window Manager to |
| indicate the number of virtual desktops. KWin DOES update this |
| property when the pager changes the number of desktops. |
+----------------------------------------------------------------+
If you have any questions regarding the specification, feel free to ask on the KWin
mailing list <kwin@kde.org>, or on the Window Manager Spec list <wm-spec-list@gnome.org>.
-- Karol <kszwed@kde.org>
Property Name Type Compliance
==========================================================================
Root Window Properties (and Related Messages):
_NET_SUPPORTED root window property COMPLETE
+----------------------------------------------------------------+
| Please add all other supported _NET properties here |
| after they are implemented. This property is complete in the |
| sence that all implemented properties are listed here. |
+----------------------------------------------------------------+
CHECKME : check it's complete
_NET_CLIENT_LIST root window property PARTIAL
+----------------------------------------------------------------+
| With xprop it seems only one WinID is stored, whereas an array |
| of all managed windows should be stored instead! |
| This is caused by xprop printing only first element of WINDOW |
| type properties, xprop has to be patched to see them all. |
| The spec requires this list contains the windows in their |
| initial mapping order, which is not true for NET::Desktop |
| windows. |
+----------------------------------------------------------------+
_NET_CLIENT_LIST_STACKING root window property COMPLETE
+----------------------------------------------------------------+
| With xprop it seems only one WinID is stored, whereas an array |
| of all managed windows should be stored instead! |
| This is caused by xprop printing only first element of WINDOW |
| type properties, xprop has to be patched to see them all. |
+----------------------------------------------------------------+
_NET_NUMBER_OF_DESKTOPS root window property + message COMPLETE
+----------------------------------------------------------------+
| _NET_VIRTUAL_ROOTS MUST be set to the new number of desktop |
| virtual root window IDs. Currently this property is NOT set, |
| but a WM SHOULD set this property and respond to the message. |
| We have NETRootInfo::setVirtualRoots() but we don't use it!! |
| This is because KWin doesn't use the virtual root windows |
| technique for creating virtual desktops, so it doesn't have |
| to set this property. |
+----------------------------------------------------------------+
_NET_DESKTOP_GEOMETRY root window property + message COMPLETE
+----------------------------------------------------------------+
| KWin doesn't implement large desktops, so it ignores |
| the message, and only sets the property to the screen size |
+----------------------------------------------------------------+
_NET_DESKTOP_VIEWPORT root window property + message COMPLETE
+----------------------------------------------------------------+
| KWin doesn't implement viewports, so it correctly sets |
| the property to (0,0) pairs and ignores the message |
+----------------------------------------------------------------+
_NET_CURRENT_DESKTOP root window property + message COMPLETE
_NET_DESKTOP_NAMES root window property COMPLETE
_NET_ACTIVE_WINDOW root window property + message COMPLETE
_NET_WORKAREA root window property COMPLETE
+----------------------------------------------------------------+
| Work Area takes into account the _NET_WM_STRUT property set on |
| client windows. I had a problem where _NET_NUMBER_OF_DESKTOPS |
| was 3, but _NET_WORKAREA had only two geometries set. |
| I need to investigate this -- Karol |
+----------------------------------------------------------------+
_NET_SUPPORTING_WM_CHECK root window property COMPLETE
_NET_VIRTUAL_ROOTS root window property COMPLETE
+----------------------------------------------------------------+
| The spec requires this property to be set only for WMs using |
| the virtual roots technique for creating virtual desktops. |
| KWin doesn't use it, so it doesn't set the property. |
+----------------------------------------------------------------+
_NET_DESKTOP_LAYOUT (pager) root window property NIL
_NET_SHOWING_DESKTOP root window property + message NIL
Other Root Window Messages:
_NET_CLOSE_WINDOW root window message COMPLETE
+----------------------------------------------------------------+
| KWin should use _NET_WM_PING and offer killing the client. |
+----------------------------------------------------------------+
_NET_MOVERESIZE_WINDOW root window message NIL
_NET_WM_MOVERESIZE root window message PARTIAL
+----------------------------------------------------------------+
| Lacks keyboard modes and button support. |
| Direction::KeyboardSize + KeyboardMove are in kdecore. |
+----------------------------------------------------------------+
Application Window Properties:
_NET_WM_NAME window property COMPLETE
+----------------------------------------------------------------+
| Set by clients |
+----------------------------------------------------------------+
_NET_WM_VISIBLE_NAME window property COMPLETE
_NET_WM_ICON_NAME window property PARTIAL
+----------------------------------------------------------------+
| Doesn't seem to be used at all, not even as a fallback |
| in KWin::icon(). Seems to be obsoleted by _NET_WM_ICON anyway? |
| The code in netwm.cpp itself seems to be correct. |
+----------------------------------------------------------------+
_NET_WM_VISIBLE_ICON_NAME window property PARTIAL
+----------------------------------------------------------------+
| The same like _NET_WM_ICON_NAME, but this property should be |
| set by the WM only if it uses different one than |
| _NET_WM_ICON_NAME. Since KWin doesn't use it at all, it's ok. |
+----------------------------------------------------------------+
_NET_WM_DESKTOP window property + message PARTIAL
+----------------------------------------------------------------+
| After the WM_Sn (ICCCM) manager selection is implemented, it |
| should be checked that the property is removed on withdrawal, |
| but not on shutdown. |
+----------------------------------------------------------------+
_NET_WM_WINDOW_TYPE window property PARTIAL
+----------------------------------------------------------------+
| Set by clients, and the handling of _NET_WM_WINDOW_TYPE itself |
| is compliant. |
+----------------------------------------------------------------+
_NET_WM_WINDOW_TYPE_DESKTOP property value (atom) COMPLETE
_NET_WM_WINDOW_TYPE_DOCK property value (atom) COMPLETE
_NET_WM_WINDOW_TYPE_TOOLBAR property value (atom)
_NET_WM_WINDOW_TYPE_MENU property value (atom) PARTIAL
+----------------------------------------------------------------+
| Qt doesn't support this type yet. |
| Up to KDE3.0, this window type was incorrectly used |
| for the toplevel menubar, and not for torn-off menus. This was |
| fixed in KDE3.1 by introducing _KDE_NET_WM_WINDOW_TYPE_TOPMENU |
| and KWin tries to detect old KDE apps using the old type. |
+----------------------------------------------------------------+
_NET_WM_WINDOW_TYPE_UTILITY property value (atom) PARTIAL
+----------------------------------------------------------------+
| Support is only in kdecore. |
+----------------------------------------------------------------+
_NET_WM_WINDOW_TYPE_SPLASH property value (atom) PARTIAL
+----------------------------------------------------------------+
| Support is only in kdecore. |
+----------------------------------------------------------------+
_NET_WM_WINDOW_TYPE_DIALOG property value (atom)
_NET_WM_WINDOW_TYPE_NORMAL property value (atom)
_NET_WM_STATE window property + message
+----------------------------------------------------------------+
| After the WM_Sn (ICCCM) manager selection is implemented, it |
| should be checked that the property is removed on withdrawal, |
| but not on shutdown. |
+----------------------------------------------------------------+
_NET_WM_STATE_MODAL property value (atom)
_NET_WM_STATE_STICKY property value (atom) COMPLETE
+----------------------------------------------------------------+
| KWin doesn't implement large desktops, so this state is |
| ignored. Note that 'sticky' here is not 'on all desktops'. |
+----------------------------------------------------------------+
_NET_WM_STATE_MAXIMIZED_VERT property value (atom) COMPLETE
_NET_WM_STATE_MAXIMIZED_HORZ property value (atom) COMPLETE
_NET_WM_STATE_SHADED property value (atom)
_NET_WM_STATE_SKIP_TASKBAR property value (atom)
_NET_WM_STATE_SKIP_PAGER property value (atom)
_NET_WM_STATE_HIDDEN property value (atom) PARTIAL
+----------------------------------------------------------------+
| Done in kdecore/netwm.cpp. Implementation required in KWin. |
+----------------------------------------------------------------+
_NET_WM_STATE_FULLSCREEN property value (atom) PARTIAL
+----------------------------------------------------------------+
| Done in kdecore/netwm.cpp. Implementation required in KWin. |
+----------------------------------------------------------------+
_NET_WM_STATE_ABOVE property value (atom) PARTIAL
+----------------------------------------------------------------+
| Done in kdecore/netwm.cpp. Implementation required in KWin. |
| Possibly a simple replace with STAYS_ON_TOP, but we need |
| proper layering. |
+----------------------------------------------------------------+
_NET_WM_STATE_BELOW property value (atom) PARTIAL
+----------------------------------------------------------------+
| Done in kdecore/netwm.cpp. Implementation required in KWin. |
+----------------------------------------------------------------+
_NET_WM_STATE_STAYS_ON_TOP property value (atom)
+----------------------------------------------------------------+
| This seems to be deprecated by _NET_WM_STATE_ABOVE and its use |
| is non-standard as far as the current spec goes (although it |
| was 'pending' around July 2002). Should we leave this for |
| backwards compatibility (we have had it since Sept. 2000) or |
| replace it with STATE_ABOVE? |
| I suggest we deprecate it as we're using the _NET_WM namespace |
| 'illegally' - Karol |
+----------------------------------------------------------------+
_NET_WM_ALLOWED_ACTIONS window property NIL
_NET_WM_ACTION_MOVE property value (atom)
_NET_WM_ACTION_RESIZE property value (atom)
_NET_WM_ACTION_MINIMIZE property value (atom)
_NET_WM_ACTION_MAXIMIZE_VERT property value (atom)
_NET_WM_ACTION_MAXIMIZE_HORZ property value (atom)
_NET_WM_ACTION_SHADE property value (atom)
_NET_WM_ACTION_STICK property value (atom)
_NET_WM_ACTION_FULLSCREEN property value (atom)
_NET_WM_ACTION_CHANGE_DESKTOP property value (atom)
_NET_WM_ACTION_CLOSE property value (atom)
_NET_WM_STRUT window property
_NET_WM_ICON_GEOMETRY window property
_NET_WM_ICON window property
CHECKME : the code in netwm.cpp is incorrect on 64bit platforms?
_NET_WM_PID window property
+----------------------------------------------------------------+
| The ICCCM specified property WM_CLIENT_MACHINE must be set to |
| a fully qualified domain name of client's host to allow the WM |
| to kill windows that do not respond to a _NET_WM_PING. |
| Note that due to gethostname(2) not returning FQDN on some |
| systems WM_CLIENT_MACHINE may not be actually FQDN. |
+----------------------------------------------------------------+
_NET_WM_HANDLED_ICONS window property COMPLETE
+----------------------------------------------------------------+
| This property should be set by a taskbar, so it has nothing to |
| do with KWin. But this property is broken anyway and should be |
| replaced by a manager selection in future NETWM versions. |
+----------------------------------------------------------------+
Window Manager Protocols:
_NET_WM_PING window property + message NIL
===========================================================================
KDE-specific extensions (for completeness):
Property Name Type
==========================================================================
_KDE_WM_CHANGE_STATE root window message
_KDE_NET_SYSTEM_TRAY_WINDOWS root window property
_KDE_NET_WM_SYSTEM_TRAY_WINDOW_FOR window property
_KDE_NET_WM_FRAME_STRUT window property
_NET_WM_WINDOW_TYPE additions:
_KDE_NET_WM_WINDOW_TYPE_OVERRIDE property value (atom)
_KDE_NET_WM_WINDOW_TYPE_TOPMENU property value (atom)
==========================================================================
Inter-Client Communication Conventions Manual (ICCCM) specs (for completeness):
Property Name Type Contents / Format
==========================================================================
Client properties:
WM_NAME window property String / 8
WM_ICON_NAME window property Text
WM_NORMAL_HINTS window property Window / 32
WM_HINTS window property WM_HINTS / 32
WM_CLASS window property Text
WM_TRANSIENT_FOR window property WM_ICON_SIZE / 32
WM_PROTOCOLS window property Atom / 32
WM_COLORMAP_WINDOWS top-level window property WM_STATE / 32
WM_CLIENT_MACHINE window property Window / 32
WM_STATE
WM_CLIENT_LEADER window property Window / 32
WM_CLIENT_ROLE window property String / 8
Window manager properties:
WM_STATE window property WM_STATE / 8?
WM_ICON_SIZE window property WM_ICON_SIZE / 8?
==========================================================================
NETWM spec compliance (whole document):
version 1.2
======================
1. COMPLETE
2.3. COMPLETE - FEATURE NOT IMPLEMENTED
2.4. COMPLETE - FEATURE NOT IMPLEMENTED
2.5. PARTIAL - minimized windows are not in IconicState - see _NET_WM_STATE_HIDDEN
2. (rest of the section) COMPLETE
3.1.
3.2. COMPLETE
3.3. COMPLETE
3.4. COMPLETE - FEATURE NOT IMPLEMENTED
3.5. COMPLETE - FEATURE NOT IMPLEMENTED
3.6. COMPLETE
3.7. COMPLETE
3.8. COMPLETE
3.9. COMPLETE
3.10. COMPLETE
3.11. COMPLETE - NOT USED
3.12.
3.13.
4.1. COMPLETE
4.2.
4.3. PARTIAL
5.1. COMPLETE
5.2. COMPLETE
5.3.
5.4.
5.5. PARTIAL
5.6. PARTIAL
5.7. PARTIAL
5.8. NIL
5.9.
5.10.
5.11.
5.12.
5.13. COMPLETE
6.1. NIL
7.3.
7.4.
7.6.
7.7.
7.9.
7.10.
7. (rest of the section) COMPLETE
ICCCM spec compliance (whole document):
version 2.0
======================
1.2.3. ?
1.2.6. ?
1. (rest of the section) COMPLETE
2.8.
2. (rest of the section) COMPLETE (selections, not a KWin thing)
3. COMPLETE - NOT SUPPORTED, OBSOLETE
4.
5. PARTIAL - patch sent to TT to make it COMPLETE (not KWin thing anyway)
5.3. COMPLETE - not KWin related
6.1. clients thing
6.2. clients thing
6.3. COMPLETE
6. (rest of the section) ?
7. COMPLETE - no idea what it is, but it doesn't seem to be KWin related
8. COMPLETE
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