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Michael Grant 4a1e445b38 window-copy: redraw pane styles on a scrollbar-driven focus change
window_copy_scroll() (called from both scrollbar-slider-drag paths -
window_copy_cmd_scroll_to_mouse() and copy-mode -S) calls
window_set_active_pane() to switch focus to the dragged pane, but was
the one caller in the whole codebase that did this without pairing it
with window_redraw_active_switch() first, and without falling back to
a full server_redraw_window() either. Every other window_set_active_
pane() caller does one or the other.

This used to be harmless because window_set_active_pane() itself did
an unconditional full redraw on every active-pane change - narrowing
that to borders/status-only for the non-zoomed case (this branch) made
pane *body* colours only repaint when something sets PANE_REDRAW,
which is exactly what window_redraw_active_switch() does by comparing
cached window-style/window-active-style colours. Without it, dragging
an inactive pane's scrollbar slider changes which pane is active
(borders and status update immediately) while both panes keep their
stale body colours until an unrelated redraw happens to touch them.

Fix: call window_redraw_active_switch() immediately before window_set_
active_pane(), matching the established pattern (e.g.
cmd-resize-pane.c's mouse-drag handler).

regress/window-copy-scrollbar-drag-focus-style.sh sets clearly
distinguishable window-active-style/window-style backgrounds, drags
the *inactive* pane's scrollbar slider, and checks - via an attached
client's own received bytes, since window-style is applied during
redraw composition rather than stored in the grid, so capture-pane
alone would not reflect it - that the newly active pane immediately
shows the active-style colour. Verified failing 3/3 against the
pre-fix code (showing both panes with swapped/stale colours, exactly
as reported) and passing 5/5 against the fix.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-22 10:01:52 +01:00
2026-09-21 22:34:05 +01:00
2026-06-26 11:28:15 +01:00
2026-03-01 17:01:08 +00:00
2020-05-19 12:34:34 +01:00
2026-09-11 09:05:06 +01:00
2026-09-09 13:28:07 +01:00
2026-03-25 10:38:03 +00:00
2026-07-13 10:29:28 +01:00

Welcome to tmux!

tmux is a terminal multiplexer: it enables a number of terminals to be created,
accessed, and controlled from a single screen. tmux may be detached from a
screen and continue running in the background, then later reattached.

This release runs on OpenBSD, FreeBSD, NetBSD, Linux, macOS and Solaris.

* Dependencies

tmux depends on libevent 2.x, available from:

	https://github.com/libevent/libevent/releases/latest

It also depends on ncurses, available from:

	https://invisible-mirror.net/archives/ncurses/

To build tmux, a C compiler (for example gcc or clang), make, pkg-config and a
suitable yacc (yacc or bison) are needed.

* Installation

To build and install tmux from a release tarball, use:

	$ ./configure && make
	$ sudo make install

tmux can use the utempter library to update utmp(5), if it is installed - run
configure with --enable-utempter to enable this.

To get and build the latest from version control - note that this requires
autoconf, automake and pkg-config:

	$ git clone https://github.com/tmux/tmux.git
	$ cd tmux
	$ sh autogen.sh
	$ ./configure && make
	$ sudo make install

* Contributing

Bug reports, feature suggestions and especially code contributions are most
welcome. Please send by email to:

	tmux-users@googlegroups.com

Or open a GitHub issue or pull request.

* Documentation

For documentation on using tmux, see the tmux.1 manpage. View it from the
source tree with:

	$ nroff -mdoc tmux.1|less

A small example configuration is in example_tmux.conf.

Other documentation is available in the wiki:

	https://github.com/tmux/tmux/wiki

Also see the tmux FAQ at:

	https://github.com/tmux/tmux/wiki/FAQ

A bash(1) completion file is at:

	https://github.com/scop/bash-completion/blob/main/completions/tmux

For debugging, run tmux with -v and -vv to generate server and client log files
in the current directory.

* Support

The tmux mailing list for general discussion and bug reports is:

	https://groups.google.com/forum/#!forum/tmux-users

Subscribe by sending an email to:

	tmux-users+subscribe@googlegroups.com

* License

This file and the CHANGES files are licensed under the ISC license. All other
files have a license and copyright notice at their start.
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