The old one is in some cases too liberal. The new one is stricter in
two ways:
1. The protocol list is now explicit, rather than matching anything://
2. Allowed characters are now limited to the "safe character set", the
"reserved character set", and some from the "unsafe character set"
Furthermore, some of the characters are restricted in how/when they
are allowed:
1. Periods, commas, question marks etc are allowed inside an URL, but
not at the end.
2. [ ], ( ), " " and ' ' are allowed but only when balanced. This
allows us to match e.g. [http://foo.bar/foo[bar]] correctly.
Closes#2016
Update tweak.scaling-filter to recognize the new scaling filters added
in fcft-3.3.0.
Since fcft_set_scaling_filter() is deprecated in 3.3.0, don't use it
anymore, and set the scaling filter via fcft_font_options instead.
This implements gamma-correct blending, which mainly affects font
rendering.
The implementation requires compile-time availability of the new
color-management protocol (available in wayland-protocols >= 1.41),
and run-time support for the same in the compositor (specifically, the
EXT_LINEAR TF function and sRGB primaries).
How it works: all colors are decoded from sRGB to linear (using a
lookup table, generated in the exact same way pixman generates it's
internal conversion tables) before being used by pixman. The resulting
image buffer is thus in decoded/linear format. We use the
color-management protocol to inform the compositor of this, by tagging
the wayland surfaces with the 'ext_linear' image attribute.
Sixes: all colors are sRGB internally, and decoded to linear before
being used in any sixels. Thus, the image buffers will contain linear
colors. This is important, since otherwise there would be a
decode/encode penalty every time a sixel is blended to the grid.
Emojis: we require fcft >= 3.2, which adds support for sRGB decoding
color glyphs. Meaning, the emoji pixman surfaces can be blended
directly to the grid, just like sixels.
Gamma-correct blending is enabled by default *when the compositor
supports it*. There's a new option to explicitly enable/disable it:
gamma-correct-blending=no|yes. If set to 'yes', and the compositor
does not implement the required color-management features, warning
logs are emitted.
There's a loss of precision when storing linear pixels in 8-bit
channels. For this reason, this patch also adds supports for 10-bit
surfaces. For now, this is disabled by default since such surfaces
only have 2 bits for alpha. It can be enabled with
tweak.surface-bit-depth=10-bit.
Perhaps, in the future, we can enable it by default if:
* gamma-correct blending is enabled
* the user has not enabled a transparent background
When auto-matching URLs (or custom regular expressions), use the
first *subexpression* as URL, rather than the while regex match.
This allows us to write custom regular expressions with prefix/suffix
strings that should not be included in the presented match.
From the release notes:
system bell - allowing e.g. terminal emulators to hand off system
bell alerts to the compositor for among other things accessibility
purposes
The new protocol is used when the new config option
bell.system=yes (and the compositor implements the protocol,
obviously).
The system bell is rung independent of whether the foot window has
keyboard focus or not (thus relying on compositor configuration to
determine whether anything should be done or not in response to the
bell).
The new option is enabled by default.
* The toplevel icon is now set to the app-id, unless "overridden" by
OSC-1 or OSC-0.
* Implemented OSC-1
* OSC-0 extended to also set the icon
* Implemented CSI 20 t - report window icon
* Implemented CSI 21 t - report window title
* Implemented CSI 22 ; 1 t - push window icon
* Implemented CS 23 ; 1 t - pop window icon
* Extended CSI 22/23 ; 0 t to also push/pop the icon
* Verify app-id set by OSC-176 is valid UTF-8
* Verify icon set by OSC-0/1 is valid UTF-8
This implements part of the new 's' (sound) parameter; the 'silent'
value. When s=silent, we set the ${muted} template argument to
"true". It is intended to set the 'suppress-sound' hint:
notify-send --hint BOOLEAN:suppress-sound:${muted}
* Don't store a list of unfinished notifications. Use a single one. If
the notification ID of the 'current' notification doesn't match the
previous, unfinished one, the 'current' notification replaces the
previous one, instead of updating it.
* Update xstrjoin() to take an optional delimiter (for example ','),
and use that when joining categories and 'alive IDs'.
* Rename ${action-arg} to ${action-argument}
* Update handling of the 'n' parameter (symbolic icon name); the spec
allows it to be used multiple times, and the terminal is supposed to
pick the first one it can resolve. Foot can't resolve icons at all,
neither can 'notify-send' or 'fyi' (which is what foot typically
executes to display a notification); it's the notification daemon that
resolves icons.
The spec _could_ be interpreted to mean the terminal should lookup
.desktop files, and use the value of the 'Icon' key from the first
matching .desktop files. But foot doesn't read .desktop files, and I
don't intend to implement XDG directory scanning and parsing of
.desktop files just to figure out which icon to use.
Instead, use a simple heuristics; use the *shortest* symbolic
names. The idea is pretty simple: plain icon names are typically
shorter than .desktop file IDs.
First, icons have been finalized in the specification. There were only
three things we needed to adjust:
* symbolic names are base64 encoded
* there are a couple of OSC-99 defined symbolic names that need to be
translated to the corresponding XDG icon name.
* allow in-band icons without a cache ID (that is, allow applications
to use p=icon without having to cache the icon first).
Second, add support for the following new additions to the protocol:
* 'f': custom app-name, overrides the terminal's app-id
* 't': categories
* 'p=alive': lets applications poll for currently active notifications
* 'id' is now 'unset' by default, rather than "0"
* 'w': expire time (i.e. notification timeout)
* "buttons": aka actions. This lets applications add additional (to
the terminal defined "default" action) actions. The 'activated' event
has been updated to report which button/action was used to activate
the notification.
To support button/actions, desktop-notifications.command had to be
reworked a bit.
There's now a new config option:
desktop-notifications.command-action-arg. It has two template
arguments ${action-name} and ${action-label}.
command-action-arg gets expanded for *each* action.
${action-name} and ${action-label} has been replaced by ${action-arg}
in command. This is a somewhat special template, in that it gets
replaced by *all* instances of the expanded actions.
If the user hasn't configured a custom 'desktop-notifications.close'
command, try to close the notification by sending SIGINT to the
notification helper.
This is best-effort:
* If there's no helper running, we do nothing (except warn)
* We don't verify, in any way, the notification is actually closed
* We don't send any other signals, under any circumstances. That is,
no SIGTERM, no SIGKILL. Ever.
Add a new config option, desktop-notifications.close, defining what to
execute to close a notification. It has a single template parameter,
${id}, that is expanded to the external notification ID foot may have
picked up from the notification helper.
notify-send does not support closing notifications, and it appears
impossible to pass an *unsigned* integer as argument to gdbus. Hence
no default value for the new 'close' option.
Example:
printf '\e]99;i=123;this is a notification\e\\'
printf '\e]99;i=123:p=close;\e\\'
Split it up into two, ${action-name} and ${action-label}.
Dunstify, for example, has a different syntax compared to notify-send:
notify-send: default=foobar
dunstify: default,foobar
Only do it when the notification was activated.
Here, activated means the 'click to activate' notification action was
triggered.
How do we tie everything together?
First, we add a new template parameter, ${action}. It's intended to be
used with e.g. notify-send's --action option.
When the action is triggered, notify-send prints its name on stdout,
on a separate line. Look for this in stdout. Only if we've seen it do
we focus/report the notification.
This patch modifies our stdout reader to consume input as we go,
instead of all at once when stdout is closed. This will make it easier
to add support for reading e.g. the daemon assigned notification ID in
the future, and also ensures we see the XDG activation token "as soon
as possible".
Furthermore, to be more future proof, require the XDG activation token
to be prefixed with 'xdgtoken=', and ignore other lines.
Thus, instead of treating *all* of stdout as the XDG activation token,
parse stdout line-by-line, and ignore everything that does not begin
with 'xdgtoken='. Everything (on that line) following 'xdgtoken=' is
treated as the activation token.
This patch adds support for window focusing, and sending events back
to the client application when a notification is closed.
* Refactor notification related configuration options:
- add desktop-notifications sub-section
- deprecate 'notify' in favor of 'desktop-notifications.command'
- deprecate 'notify-focus-inhibit' in favor of
'desktop-notifications.inhibit-when-focused'
* Refactor: rename 'struct kitty_notification' to 'struct
notification'
* Pass a 'struct notification' to notify_notify(), instead of many
arguments.
* notify_notify() now registers a reaper callback. When the notifier
process has terminated, the notification is considered closed, and we
either try to focus (activate) the window, or send an event to the
client application, depending on the notification setting.
* For the window activation, we need an XDG activation token. For now,
assume *everything* written on stdout is part of the token.
* Refactor: remove much of the warnings from OSC-99; we don't
typically log anything when an OSC/CSI has invalid values.
* Add icon support to OSC-99. This isn't part of the upstream
spec. Foot's implementation:
- uses the 'I' parameter
- the value is expected to be a symbolic icon name
- a quick check for absolute paths is done, and such icon requests
are ignored.
* Added ${icon} to the 'desktop-notifications.command' template. Uses
the icon specified in the notification, or ${app-id} if not set.
This adds limited support for OSC-99, kitty desktop notifications[^1]. We
support everything defined by the "protocol", except:
* 'a': action to perform on notification activation. Since we don't
trigger the notification ourselves (over D-Bus), we don't know a)
which ID the notification got, or b) when it is clicked.
* ... and that's it. Everything else is supported
To be explicit, we *do* support:
* Chunked notifications (d=0|1), allowing the application to append
data to a notification in chunks, before it's finally displayed.
* Plain UTF-8, or base64-encoded UTF-8 payload (e=0|1).
* Notification identifier (i=xyz).
* Payload type (p=title|body).
* When to honor the notification (o=always|unfocused|invisible), with
the following quirks:
- we don't know when the window is invisible, thus it's treated as
'unfocused'.
- the foot option 'notify-focus-inhibit' overrides 'always'
* Urgency (u=0|1|2)
[^1]: https://sw.kovidgoyal.net/kitty/desktop-notifications/
