As long as the mouse button was *pressed* while the pointer was inside
the grid, we want to keep reporting motion events until the button is
released.
Even when the pointer moves outside the grid (but in this case, the
reported coordinates are bounded by the grid size).
This patch also tries to improve multi-button handling (i.e. multiple
buttons pressed at the same time), and the events we report to the
client for these, in the following ways:
* Motion events now report the *initial* button. That is, if you start
a drag operation with the LEFT button, then press RIGHT (before
releasing LEFT), keep reporting LEFT in the motion events.
* Mouse release events are reported for *any* button, as long as the
pointer is *inside* the grid, *or*, the button released was the
button used to start a drag operation.
The last point is important; if we have reported a button press
followed by motion events (i.e. a drag operation), we need to report
the button release, *even* if the pointer is outside the grid.
Note that the client may receive unbalanced button press/release
events in the following ways if the user pressed one, and then a
second button *inside* the grid, then releases the *first*
button (possibly outside the grid), and finally releases the *second*
button *outside* the grid.
In this case, both buttons will report press events. The first button
will report a release event since it is the initial button in the drag
operation.
However, we don’t track the fact that the second button is being
pressed, and thus if it is released outside the grid, it wont generate
a release event.
OSC 777 is URxvt’s generic escape to send commands to its perl
extensions. The first parameter is the name of the extension, followed
by its arguments.
OSC 777;notify is a, if not well established, at least a fairly well
known escape sequence to request a (desktop) notification. The syntax
is:
\e]777;notify;<title>;<body>\e\\
Neither title nor body is escaped in any way, meaning they should not
contain a ‘;’.
Foot will split title from body at the *first* ‘;’. Any remaining ‘;’
characters are treated as part of ‘body’.
Instead of adding built-in support for the freedesktop notification
specification (which would require us to link against at least dbus),
add a new config option to foot.ini: ‘notify’.
This option specifies the command to execute when a notification is
received. ‘${title}’ and ‘${body}’ can be used anywhere, in any
combination, and as many times as you want, in any of the command
arguments.
The default value is ‘notify-send -a foot -i foot ${title} ${body}’
When calculating the offset into the search string, from where to
start rendering, take into account that the cursor position is
in *characters*, and the glyph-offset is in *cells*.
While doing a scrollback search, the pre-edit string should be
rendered in the search box, not in the grid.
Note that we don’t yet support IME in scrollback search mode. This
patch simply prevents the pre-edit text being rendered in the grid,
in the “background”, while searching.
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.
