The default foot output looks like this, in Debian testing "bookworm"
at the time of writing:
anarcat@angela:pubpaste$ foot true
info: main.c:421: version: 1.13.1 +pgo +ime +graphemes -assertions
info: main.c:428: arch: Linux x86_64/64-bit
info: main.c:440: locale: fr_CA.UTF-8
info: config.c:3003: loading configuration from /home/anarcat/.config/foot/foot.ini
info: fcft.c:338: fcft: 3.1.5 +graphemes -runs +svg(nanosvg) -assertions
info: fcft.c:377: fontconfig: 2.13.1, freetype: 2.12.1, harfbuzz: 5.2.0
info: fcft.c:838: /home/anarcat/.local/share/fonts/Fira-4.202/otf/FiraMono-Regular.otf: size=8.00pt/8px, dpi=75.00
info: wayland.c:1353: eDP-1: 2256x1504+0x0@60Hz 0x095F 13.32" scale=2 PPI=205x214 (physical) PPI=136x143 (logical), DPI=271.31
info: wayland.c:1509: requesting SSD decorations
info: fcft.c:838: /home/anarcat/.local/share/fonts/Fira-4.202/otf/FiraMono-Bold.otf: size=24.00pt/32px, dpi=96.00
info: fcft.c:838: /home/anarcat/.local/share/fonts/Fira-4.202/otf/FiraMono-Regular.otf: size=24.00pt/32px, dpi=96.00
info: fcft.c:838: /home/anarcat/.local/share/fonts/Fira-4.202/otf/FiraMono-Bold.otf: size=24.00pt/32px, dpi=96.00
info: fcft.c:838: /home/anarcat/.local/share/fonts/Fira-4.202/otf/FiraMono-Regular.otf: size=24.00pt/32px, dpi=96.00
info: terminal.c:700: cell width=19, height=39
info: terminal.c:588: using 16 rendering threads
info: wayland.c:859: using SSD decorations
info: main.c:680: goodbye
anarcat@angela:pubpaste$
That's 17 lines of output that are *mostly* useless for most use
cases. I might understand having this output during the project's
startup, when it's helpful for diagnostics, but now Foot just mostly
works everywhere, and I've never had a use for any of that stuff in
the (arguably short) time I've been using Foot so far.
And if I do, there's the `--log-level` commandline option to tweak
this. At first, I looked at tweaking the log level through the config
file. But as explained in this issue:
https://codeberg.org/dnkl/foot/issues/1142
... there's a chicken and egg problem there that makes it hard to
implement and possibly confusing for users as well.
There's also the possibility for users to change the shortcut with
which they start foot, for example a `.desktop` file so that menu
systems that support those start foot properly. But that only works in
that environment, and not through the so many things that will just
call `foot` and hope it will do the right thing.
In my case, I have `foot` hardcoded in a lot of places now, between
sway and waybar, and this is only going to grow. Others have suggested
adding the flag to a $TERMINAL global variable, but that won't help
.desktop users.
So, instead of playing whack-a-mole with the log levels, just make it
so that, by default, foot is silent. This is actually one of the
[basics of UNIX philosophy][1]:
> Rule of Silence: When a program has nothing surprising to say, it
> should say nothing.
And yes, I am aware I am severely violating that principle by writing
a way too long commit log for a one-line patch, but there you go, I
figured it was good to document the why of this properly.
[1]: https://web.archive.org/web/20031102053334/http://www.faqs.org/docs/artu/ch01s06.html
If an output has a bogus physical width or height, the DPI can become
so high that the cell width/height is too large for
pixman_image_fill_rectangles(), resulting in a crash in pixman_fill().
Since it doesn’t make any sense to use a DPI that is obviously bogus,
don’t. Force it 96 instead.
When drawing a block cursor using inversed fg/bg colors, we didn’t
strip the alpha from the background color. This meant that the text
"behind" the cursor was rendered with transparency. If alpha was set
to 0, the text was completely invisible.
We should never apply alpha to the text color. So, detect this, and
force alpha to 1.0.
Normally, when selecting the cursor’s color, we don’t really know
_where_ the background color is coming from (or more accurately,
_what_ it is).
However, the *only* background color that can have a non-1.0 alpha is
the *default* background color.
This is why we can ignore the bg parameter, and use term->colors.fg/bg
instead.
Closes#1205
When we try to resize a sixel past the current max height, we set
col > image-width to signal this.
This means ‘width’ could be smaller than ‘col’. When calculating how
many sixels to emit in sixel_add_many(), we didnt’ account for this.
The resulting value was -1, converted to ‘unsigned’. I.e. a very large
value. This resulted in an assert triggering in sixel_add() in debug
builds, and a crash in release builds.
This improves handling of symlinks (in CWD) when launching a new
terminal instance, either through ctrl+shift+n, or using the
--working-directory command line option.
Closes#1179
These capabilities are not included in the standard ‘xterm’ or
‘xterm-256color’ terminfos. They’re used in
‘xterm+focus’ ->
‘xterm+sm+1002’ ->
‘xterm-1002|xterm+sm+1003’ ->
‘xterm-1003’
(https://invisible-island.net/ncurses/terminfo.ti.html#tic-xterm_focus)
However, as far as I can tell, ncurses doesn’t use these capabilities
at all.
This patch adds support for creating utmp records using the ‘utempter’
helper binary from the ‘libutempter’ package.
* New config option ‘main.utempter’
* New meson command line option, -Ddefault-utempter-path. Defaults to
auto-detecting the path.
The default value of the new ‘main.utempter’ config option depends on
the meson command line option ‘-Ddefault-utempter-path’.
If ‘main.utempter’ is *not* set to ‘none’, foot will try to execute
the utempter helper binary to create utmp records when a new terminal
is instantiated. The record is removed when the terminal instance is
destroyed.
When rendering the overlay for scrollback search, the logic assumed
buffer re-use. On some compositors this isn’t happening (on
e.g. KDE/plasma we’re forced to double buffer).
This resulted in matches not being highlighted correctly.
The problem is in how we calculated the region for which areas to
clear ("un-dim"). It uses the "previous frame’s see-through area"
minus the current frame’s see-through area.
However, when we’ve detected that the current buffer isn’t the same as
the last one, we set the last frame’s see-through region to "the
entire buffer". Thus, when calculating the diff, we end up with an
empty region, and nothing is highlighted.
Fix by simply using the current frame’s see-through region as-is when
we’ve detected we’re not re-using the last frame’s buffer.
On compositors that forces us to double buffer, we need to re-apply
the last frame’s damage to the current frame (which uses the buffer
from the next-to-last frame).
General cell updates are handled by simply copying from the last
frame’s pixman buffer to the current frame’s.
In an attempt to improve performance, scroll damage were up until now
handled by re-playing the last frame’s scroll damage (on the current
frame’s buffer). This does not work, and resulted in glitches when
scrolling in the scrollback.
This patch does the following:
* grid_render_scroll{,_reverse}() now update the buffer’s "dirty"
region. This means the generic copy-old-frames-buffer handles the
scroll damage (albeit in, potentially, a less efficient way).
* Tracking of, and re-applying old scroll damage is completely
removed.
Closes#1173
The status value 4 means "permanently reset", as opposed to 2, which
means "reset". The former implies that there's no way to enable the
mode because it's unsupported (but recognized).
Note: this commit also fixes an unrelated typo in CHANGELOG.md.
Key-binding sets are bound to a seat/configuration pair. The conf
reference is done when a new terminal instance is created.
When that same terminal instance is destroyed, the key binding set is
unref:ed.
If the terminal instance is destroyed *before* the key binding set has
been referenced, we’ll still unref it. This creates an imbalance.
In particular, when the there is exactly one other terminal instance
referencing that same key binding set, that terminal instance will
trigger a foot server crash as soon as it receives a key press/release
event. This happens because the next-to-last terminal instance brought
the reference count of the binding set down to 0, causing it to be
free:d.
Thus, we *must* reference the binding set *before* we can error
out (when instantiating a new terminal instance).
At this point, we don’t yet have a valid terminal instance. But,
that’s ok, because all the key_binding_new_for_term() did with the
terminal instance was get the "struct wayland" and "struct config"
pointers. So, rename the function and simply pass these pointers
explicitly.
Similarly, change key_binding_for() to take a "struct config" pointer,
rather than a "struct terminal" pointer.
Also rename key_binding_unref_term() -> key_binding_unref().
Foot 1.13.0 introduced a regression where non-trailing empty cells
were highlighted inconsistently (cells that shouldn’t be highlighted,
were, seemingly at random).
86663522d5 “fixed” this by never
highlighting *any* empty cells.
This meant the behavior, compared to foot 1.12 and earlier,
changed. In foot 1.12 and older versions, non-trailing empty cells
were highlighted, as long as the selection covered at least one of the
trailing non-empty cells.
This patch restores that behavior.
To understand how this works, lets first take a look at how selection
works:
When a selection is made, and updated (i.e. the mouse is dragged, or
the selection is extended through RMB etc), we need to (un)tag and dirty
the cells that are a) newly selected, or b) newly deselected. That is,
we look at the diff between the “old” and the “new” selection, and
only update those cells.
This is for performance reasons: iterating the entire selection is not
feasible with large selections. However, it also means we cannot
reason about empty cells; we simply don’t know if an empty cells is a
trailing empty cell, or a non-trailing one.
Then, when we render a frame, we iterate all the *visible*
and *selected* cells, once again tagging them as selected (this is
needed since a selected cell might have lost its selected tag if the
cell was written to, by the client application, after the selection
was made).
At this point, we *can* reason about empty cells.
So, to restore the highlighting behavior to that of foot 1.12, we do
this:
When working with the selection diffs when a selection is updated, we
don’t special case empty cells at all. Thus, all empty cells covered
by the selection is highlighted, and dirtied.
But, when rendering the frame, we _do_ special case them. The only
difference (compared to foot 1.12) is that we *must*
explicitly *clear* the selection tag, and dirty the empty cells. This
is to ensure the empty cells that were incorrectly highlighted by the
selection update algorithm, isn’t rendered as that.
This does have a slight performance impact, as empty cells are now
always re-rendered. The impact should however be small.
This fixes a regression, where empty cells "between" non-empty
cells (i.e. non-trailing empty cells) sometimes were incorrectly
highlighted.
The idea has always been to highlight exactly those cells that will
get extracted when they’re copied. This means we’ve not highlighted
trailing empty cells, but we _have_ highlighted other empty cells,
since they are converted to spaces when copied (whereas trailing empty
cells are skipped).
fa2d9f8699 changed how a selection is
updated. That is, which cells gets marked as selected, and which ones
gets unmarked.
Since we no longer walk all the cells, but instead work with pixman
regions representing selection diffs, we can no longer determine (with
certainty) which empty cells should be selected and which shouldn’t.
Before this patch (but after
fa2d9f8699), we sometimes incorrectly
highlighted empty cells that should not have been highlighted. This
happened when we’ve first (correctly) highlighted a region of empty
cells, but then shrink the selection such that all those empty cells
should be de-selected.
This patch changes the selection behavior to *never* highlight empty
cells. This fixes the regression, but also means slightly different
behavior, compared to pre-fa2d9f86996467ba33cc381f810ea966a4323381.
The other alternative is to always highlight all empty cells. But,
since I personally like the fact that we’re skipping trailing empty
cells, I prefer the approach taken by this patch.
Foot 1.13.0 introduced a regression where non-trailing empty cells
were highlighted inconsistently (cells that shouldn’t be highlighted,
were, seemingly at random).
86663522d5 “fixed” this by never
highlighting *any* empty cells.
This meant the behavior, compared to foot 1.12 and earlier,
changed. In foot 1.12 and older versions, non-trailing empty cells
were highlighted, as long as the selection covered at least one of the
trailing non-empty cells.
This patch restores that behavior.
To understand how this works, lets first take a look at how selection
works:
When a selection is made, and updated (i.e. the mouse is dragged, or
the selection is extended through RMB etc), we need to (un)tag and dirty
the cells that are a) newly selected, or b) newly deselected. That is,
we look at the diff between the “old” and the “new” selection, and
only update those cells.
This is for performance reasons: iterating the entire selection is not
feasible with large selections. However, it also means we cannot
reason about empty cells; we simply don’t know if an empty cells is a
trailing empty cell, or a non-trailing one.
Then, when we render a frame, we iterate all the *visible*
and *selected* cells, once again tagging them as selected (this is
needed since a selected cell might have lost its selected tag if the
cell was written to, by the client application, after the selection
was made).
At this point, we *can* reason about empty cells.
So, to restore the highlighting behavior to that of foot 1.12, we do
this:
When working with the selection diffs when a selection is updated, we
don’t special case empty cells at all. Thus, all empty cells covered
by the selection is highlighted, and dirtied.
But, when rendering the frame, we _do_ special case them. The only
difference (compared to foot 1.12) is that we *must*
explicitly *clear* the selection tag, and dirty the empty cells. This
is to ensure the empty cells that were incorrectly highlighted by the
selection update algorithm, isn’t rendered as that.
This does have a slight performance impact, as empty cells are now
always re-rendered. The impact should however be small.
This is my variant of the solarized theme, were only the first eight
colors (i.e. the "normal") colors are from the solarized theme. The
remaining eight (the "bright" colors) are brightened versions of the
"normal" colors. This results in a theme that is usually in all
applications, not just those that are "aware" that the terminal color
theme is "solarized".
This fixes a regression, where empty cells "between" non-empty
cells (i.e. non-trailing empty cells) sometimes were incorrectly
highlighted.
The idea has always been to highlight exactly those cells that will
get extracted when they’re copied. This means we’ve not highlighted
trailing empty cells, but we _have_ highlighted other empty cells,
since they are converted to spaces when copied (whereas trailing empty
cells are skipped).
fa2d9f8699 changed how a selection is
updated. That is, which cells gets marked as selected, and which ones
gets unmarked.
Since we no longer walk all the cells, but instead work with pixman
regions representing selection diffs, we can no longer determine (with
certainty) which empty cells should be selected and which shouldn’t.
Before this patch (but after
fa2d9f8699), we sometimes incorrectly
highlighted empty cells that should not have been highlighted. This
happened when we’ve first (correctly) highlighted a region of empty
cells, but then shrink the selection such that all those empty cells
should be de-selected.
This patch changes the selection behavior to *never* highlight empty
cells. This fixes the regression, but also means slightly different
behavior, compared to pre-fa2d9f86996467ba33cc381f810ea966a4323381.
The other alternative is to always highlight all empty cells. But,
since I personally like the fact that we’re skipping trailing empty
cells, I prefer the approach taken by this patch.
This adds an "underline-thickness" setting to the "main" section,
similar to the existing "underline-offset" setting. This setting is used
to specify a custom height for regular (= non-cursor) underlines.
Fixes#1136
In some cases, the compositor sends a pointer enter event with a NULL
surface. It’s unclear if this is a compositor bug, or a race (where
the compositor sends an enter event on a CSD surface at the same time
foot unmaps the CSDs). Regardless, this causes seat->mouse_focus to be
unset, which triggers a crash in foot on the next pointer motion
event.
This patch does two things:
a) log a warning when we receive a pointer event with a NULL surface
b) ignore motion events where seat->mouse_focus is NULL
In some cases, the compositor sends a pointer enter event with a NULL
surface. It’s unclear if this is a compositor bug, or a race (where
the compositor sends an enter event on a CSD surface at the same time
foot unmaps the CSDs). Regardless, this causes seat->mouse_focus to be
unset, which triggers a crash in foot on the next pointer motion
event.
This patch does two things:
a) log a warning when we receive a pointer event with a NULL surface
b) ignore motion events where seat->mouse_focus is NULL
When the window is resized and we reflow the text, we ended up
inserting an empty row at the bottom.
This happens whenever the actual last row has a hard linebreak (which
almost always is the case); we then end the reflow with a line break,
causing an extra, empty, row to be allocated and inserted.
This patch fixes this by detecting when:
1) the last row is empty
2) the next to last row has a hard line break
In this case, we roll back the last line break, by adjusting the new
offset we just calculated, and free:ing the empty row.
TODO: it would be nice if we could detect this in the reflow loop
instead, and avoid doing the last line break all together. I haven’t
yet been able to find a way to do this correctly.
Closes#1108
Systemd, when doing socket activation, pass file descriptors in a
non-stable order when there is multiples ones.
But we only use one, so we don't need to identify it, and the file
descriptors always start at 3.
So use 3 for the systemd service.
Source : sd_listen_fds (systemd man pages)
We also need to unset variables systemd pass to socket activated
process, since we don't need them and sub-process (footclient and
theirs forks) could be confused by those.
Closes#1107
This mode is activated through the new key-bindings.unicode-input and
search-bindings.unicode-input key bindings.
When active, the user can “build” a Unicode codepoint by typing its
hexadecimal value.
Note that there’s no visual feedback in this mode. This is
intentional. This mode is intended to be a fallback for users that
don’t use an IME.
Closes#1116
Before this patch, each selection update would result in grid covered
by the selection being walked *three* times. First to “premark” the
area that *will* be selected after the update, then again to unmark
the previous selection (excluding the cells that were premarked - but
the cells are still iterated), and then one more time to finalize the
selection state in the grid.
Furthermore, each time a frame is rendered, the entire selection were
iterated again, to ensure all the cells have their ‘selected’ bit
set.
This quickly gets *very* slow.
This patch takes a completely different approach. Instead of looking
at the selection as a range of cells to iterate, we view it as an
area, or region. Thus, on each update, we have to regions: the region
representing the previous selection, and the region representing the
to-be selection.
By diffing these two regions, we get two new regions: one that
represents the cells that were selected, but aren’t any more, and one
that represents the cells that previously were not selected, but now
will be.
We implement the regions using pixman regions. By subtracting the
current selection from the previous selection, we get the region
representing the cells that are no longer selected, and that should be
unmarked.
By subtracting the previous selection from the current, we get the
region representing the cells that was added to the selection in this
update, and that should be marked.
selection_dirty_cells() is rewritten in a similar manner. We create
pixman regions for the selection, and the current scrollback view. The
intersection represents the (selected) cells that are visible. These
need to iterated and marked as being selected.
Closes#1114
When extending a selection, we determine *how* to extend it (which
endpoint to move, and whether to grow or shrink the selection) by
comparing the extension point with the old start and end coordinates.
For this to work correctly, we need to use scrollback relative
coordinates.
This fixes an issue where extending a very large selection (covering
many pages) sometimes shrunk the selection instead of growing it, or
just misbehaving in general.
When checking if the current selection intersects with the
region (passed as parameter to the function), use scrollback relative
coordinates.
This fixes an issue where selections crossing the scrollback
wrap-around being misdetected, resulting in either the selection being
canceled while scrolling, even though it wasn’t scrolled out, or the
selection _not_ being canceled, when it _was_ scrolled out.
Make sure to increment match_end_col to account for trailing SPACER
cells after a match.
This fixes an issue where search matches weren’t highlighted correctly
when the match *ends* with a double-width character.
