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HideCursor/ShowCursor: Fix the interpretation of the window argument

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In the implementation of HideCursor/ShowCursor in the xserver code,
the window passed in only identifies a screen, not a portion of the
window tree, and it's been that way since the beginning. Changing
the implementation at this point would likely break existing code,
and the main usage of this protocol (magnifiers) only needs the
global behavior, so change the protocol to document the actual
behavior.

Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Owen W. Taylor <otaylor@fishsoup.net>
This commit is contained in:
Owen W. Taylor 2015-04-08 11:30:39 -04:00 • committed by Adam Jackson
parent 67ccebd2cb
commit e4ba4e04b8
1 changed files with 6 additions and 16 deletions
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22
fixesproto.txt
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@ -525,20 +525,14 @@ HideCursor
A client sends this request to indicate that it wants the
cursor image to be hidden (i.e. to not be displayed) when
the sprite is inside the specified window, or one of its
subwindows. If the sprite is inside a window for which one
or more active clients have requested cursor hiding then the
cursor image will not be displayed.
the sprite is on the same screen as the specified window.
The sprite will be hidden if one or more clients have called
HideCursor and not ShowCursor.
Note that even though cursor hiding causes the cursor image
to be invisible, CursorNotify events will still be sent
normally, as if the cursor image were visible.
If, during a grab, one or more active clients have requested
cursor hiding for grab window, or one of its ancestors, the
cursor image of the grab cursor will not be displayed during
the lifetime of that grab.
When a client with outstanding cursor hiding requests
terminates its connection these requests will be deleted.
@ -552,13 +546,9 @@ ShowCursor
window: WINDOW
A client sends this request to indicate that it wants the
cursor image to be displayed when the sprite is inside the
specified window, or one of its subwindows. If the sprite
is inside a window for which no active clients have requested
cursor hiding then the cursor image for that window will be
displayed. In other words, if a client calls HideCursor for
a specified window, or window subtree, this request reverses
the effects of the HideCursor request.
cursor image to be displayed when the sprite is on the same
screen as the specified window. The sprite will be hidden
if one or more clients have called HideCursor and not ShowCursor.
If the client has made no outstanding HideCursor requests
a BadMatch error is generated.