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Turn on XInput 2 support by default

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The support doesn't interfere with compatibility, since Emacs
built with XInput 2 support transparently falls back to Core
Input when a suitable version of the input extension is not
available.  It also matured much sooner than expected, so
enabling this by default will lead to new features being
available to more users.

* INSTALL:
* configure.ac:
* etc/NEWS: Enable XInput 2 support by default.
This commit is contained in:
Po Lu 2022-05-04 16:48:24 +08:00
parent 69521ffcb0
commit 0105a4ddb8
3 changed files with 9 additions and 8 deletions
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6
INSTALL
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@ -358,9 +358,9 @@ Use --without-toolkit-scroll-bars to disable Motif or Xaw3d scroll bars.
Use --without-xim to inhibit the default use of X Input Methods.
In this case, the X resource useXIM can be used to turn on use of XIM.
Use --with-xinput2 to enable the use of version 2 of the X Input
Extension. This enables support for touchscreens, pinch gestures, and
scroll wheels that report scroll deltas at pixel-level precision.
Use --without-xinput2 to disable the use of version 2 of the X Input
Extension. This disables support for touchscreens, pinch gestures,
and scroll wheels that report scroll deltas at pixel-level precision.
Use --disable-largefile to omit support for files larger than 2GB, and
--disable-year2038 to omit support for timestamps past the year 2038,

2
configure.ac
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@ -490,7 +490,7 @@ OPTION_DEFAULT_ON([modules],[don't compile with dynamic modules support])
OPTION_DEFAULT_ON([threads],[don't compile with elisp threading support])
OPTION_DEFAULT_OFF([native-compilation],[compile with Emacs Lisp native compiler support])
OPTION_DEFAULT_OFF([cygwin32-native-compilation],[use native compilation on 32-bit Cygwin])
OPTION_DEFAULT_OFF([xinput2],[use version 2 of the X Input Extension for input])
OPTION_DEFAULT_ON([xinput2],[don't use version 2 of the X Input Extension for input])
AC_ARG_WITH([file-notification],[AS_HELP_STRING([--with-file-notification=LIB],
[use a file notification library (LIB one of: yes, inotify, kqueue, gfile, w32, no)])],

9
etc/NEWS
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@ -59,10 +59,11 @@ If a constant file name is required, the file can be renamed to
"emacs.pdmp", and Emacs will find it during startup anyway.
---
** Emacs now supports use of XInput 2 for input events.
If your X server has support and you have the XInput 2 development headers
installed, you can configure Emacs with the option '--with-xinput2' to enable
this support.
** Emacs now uses of XInput 2 for input events.
If your X server has support and you have the XInput 2 development
headers installed, Emacs will use the X Input Extension for handling
input. If this causes problems, you can configure Emacs with the
option '--without-xinput2' to disable this support.
The named feature 'xinput2' can be used to test for the presence of
XInput 2 support from Lisp programs.