We may want to be able to enable/disable IME run-time, even though we
have received an ‘enter’ IME event.
This enables us to do that.
Also add functions to enable/disable IME on a per-terminal instance
basis.
A terminal may have multiple seats focusing it, and enabling/disabling
IME in a terminal instance enables/disables IME on all those seats.
Finally, the code to enable IME is simplified; the *only* surface that
can ever receive ‘enter’ IME events is the main grid. All other
surfaces are sub-surfaces, without their own keyboard focus.
This is done by allocating cells for the pre-edit text when receiving
the text-input::done() call, and populating them by converting the
utf-8 formatted pre-edit text to wchars.
We also convert the pre-edit cursor position to cell positions (it can
cover multiple cells).
When rendering, we simply render the pre-edit cells on-top off the
regular grid. While doing so, we also mark the underlying, “real”,
cells as dirty, to ensure they are re-rendered when the pre-edit text
is modified or removed.
This mode can be set by client programs with the DECSET, DECRST,
XTSAVE and XTRESTORE sequences by using 27127 as the parameter.
The sequence "\E[27;1;27~" is encoded in the same way as is done by
xterm's "modifyOtherKeys" mode. Even though xterm itself never emits
such a sequence for the Escape key, many programs already have
support for parsing this style of key sequence.
There are two different escape sequences that can be used to set the
cursor blink state: ‘CSI ? 12 h/l’ and ‘CSI Ps SP q’.
Up until now, they both modified the same internal state in foot. This
meant you could enable a blinking cursor with e.g. ‘CSI ? 12 h’ and
then disable it with ‘CSI 2 SP q’.
Since the ‘CSI ? 12’ escapes are used in the civis/cnorm/cvvis
terminfo entries, applications often ended up disabling the blink
state on exit (typically be emitting ‘cnorm’), requiring users to
manually re-enable blinking.
By splitting the internal state into two separate states, we can
improve the situation.
The cursor will blink if at least one of the two have been enabled.
The setting in foot.ini sets the default state of the ‘CSI Ps SP q’
escape.
This means if the user has enabled blinking in the configuration, the
cursor will blink regardless of civis/cnorm/cvvis. Which probably is
what the user wants.
If the user has NOT enabled blinking, civis/cnorm/cvvis act as
intended: cvvis blink, civis and cnorm do not.
If an application overrides the cursor blink/style with ‘CSI Ps SP q’,
that will override the user’s setting in foot.ini. But most likely
that too is intended (for example, the user may have configured the
application to use a different cursor style). And, a well written
application will emit the ‘Se’ terminfo sequence on exit, which in
foot is defined to ‘CSI SP q’, which will reset both the style and
blink state to the user configured style/state.
Closes#218
When disabled, foot no longers uses outputs’ DPI to scale the
font. Instead, it uses the outputs’ scaling factor.
That is, instead of appending “:dpi=123” to the fontconfig string,
modify the “:pixelsize” or “:size” attribute.
Closes#206
These options lets the user configure custom fonts and styles, to use
with the bold and italic cell attributes.
By default, they are unset, meaning we use the bold/italic variants of
the regular font.
Closes#169.
Bind to xdg-shell version 2 if available, as this enables us to
track our window’s ‘tiled’ state in the ‘configure’ events.
This in turn allows us to stash the ‘old’ window size when being
tiled, to be used again when restoring the window size when un-tiled.
Moving the mouse outside the grid while we have an on-going selection
now starts a timer. The interval of this timer depends on the mouse’s
distance from the grid - the further away the mouse is, the shorter
interval.
On each timer timeout, we scroll one line, and update the
selection. Thus, the shorter the interval, the faster we scroll.
The timer is canceled as soon as the mouse enters the grid again, or
the selection is either canceled or finalized.
The timer FD is created and destroyed on-demand.
Most of the logic is now in selection.c. The exception is the
calculation of the timer interval, which depends on the mouse’s
position. Thus, this is done in input.c.
The scroll+selection update logic needs to know a) which direction
we’re scrolling in, and b) which *column* the selection should be
updated with.
If the mouse is outside the grid’s left or right margins, the stored
mouse column will be -1. I.e. we don’t know whether the mouse is on
the left or right side of the grid. This is why the caller, that
starts the timer, must provide this value.
The same applies to top and bottom margins, but since we already have
the scroll *direction*, which row value to use can be derived from this.
Add anew config option, ‘bell=none|set-urgency’. When set to
‘set-urgency’, the margins will be painted in red (if the window did
not have keyboard focus).
This is intended as a cheap replacement for the ‘urgency’ hint, that
doesn’t (yet) exist on Wayland.
Closes#157
term_damage_cursor() damages the cell where the cursor is currently
at. This can be used to ensure the cursor is re-drawn, if there aren’t
any other pending updates.
term_damage_margins() requests the margins be redrawn the next time we
render the grid.
While pasting data from the clipboard, block *all* other data from
being sent to the client. This includes keyboard and mouse events, but
also replies for VT queries.
This is particularly important when bracketed paste has been enabled,
since then the client will interpret *everything* between the
bracketed paste start and end as paste data.
This extends the "normal" bind action enum with mouse specific
actions.
When parsing key bindings, we only check up to the last valid keyboard
binding, while mouse bindings support *both* key actions and mouse
actions.
The new actions are:
* select-begin: starts an interactive selection
* select-extend: interactively extend an existing selection
* select-word: select word under cursor
* select-word-whitespace: select word under cursor, where the only
word separating characters are whitespace characters.
The old hard-coded selection "bindings" have been converted to instead
use these actions, via default bindings added to the configuration.
Without this, the initial cell will always be selected, regardless of
how the selection is moved to the left or right.
With this patch, the initial cell will only be selected while the
selection is being made in the original direction. Changing direction
of the selection moves the start point to next/previous character.
When enabled, the mouse cursor is hidden when the user types in the
terminal. It is un-hidden when the user moves the mouse, or when the
window loses keyboard focus.
* Rename user_warning to user_notification
* Add warning and error types (in addition to the existing deprecated)
* Simplify logic when emitting a user notification after forking; we
don't need to copy the notification data since we're in a new
process and have total control over that memory.
When printing a multi-column character, write CELL_MULT_COL_SPACER
instead of '0' to both padding cells (when character doesn't fit at
the end of the line), and to the cells following the actual character.
Instead of locking the queue for each dirty row we append, and
signaling a condition variable, just keep the lock while going through
the visible rows.
Release the lock once done.
Since we take the lock *before* posting the 'start' semaphore, all
workers will be waiting for the lock to be released.
Then, one at a time they'll get the lock and pick a row to
render. The queue will never get empty - when all rows have been
rendered, each worker will pick a 'frame done' "job" from the queue,
and break the rendering loop.
Previously, we had to explicitly render the old cursor cell *before*
applying scrolling damage.
We then rendered all the dirty rows, *without* rendering the cursor -
even if the cursor cell was among the dirty rows.
Finally, when everything else was done, we explicitly rendered the
cursor cell.
This meant a lot of code, and unnecessary render_cell() calls, along
with unnecessary wl_surface_damage_buffer() calls.
This was a necessary in the early design of foot, but not anymore.
We can simply mark both the old cursor cell, and the current one, as
dirty and let the normal rendering framework render it. All we need to
do is pass the cursor column to render_row(), so that it can pass
has_cursor=true in the appropriate call to render_cell(). We pass -1
here for all rows, except the cursor's row, where we pass the actual
cursor column.
With this, there's no need to calculate whether the cursor is visible
or not; just mark it's cell as dirty, and if that row is visible, the
normal rendering will take care of it.
This also simplifies the state needed to be saved between two frames;
we only need a row pointer, and the cursor column index.
Part of https://codeberg.org/dnkl/foot/issues/35
