When the focus reporting mode (1004) is enabled, send the current focus
state. This allows applications to track their own focus state without
first having to wait for a focus event (or query
it by sending a DECSET followed by a DECRST).
Ghostty's focus state is stored only in the renderer, where the termio
thread cannot access it. We duplicate the focus state tracking in the
Terminal struct with the addition of a new (1-bit) flag. We duplicate
the state because the renderer uses the focus state for its own purposes
(in particular, the Metal renderer uses the focus state to manage
its DisplayLink), and synchronizing access to the shared terminal state
is more cumbersome than simply tracking the focus state in the renderer
in addition to the terminal.
Handle `clonePartialRowFrom` errors in `insertLines` and `deleteLines`
by adjusting page capacity. To do this, I've rewritten both functions
with a new way of iterating rows by moving a tracked pin up/down.
Benchmarks seem to indicate that this has no effect on performance.
Ghostty previously incorrectly only created scrollback if the top/bot
margins were the full height of the viewport. The actual xterm behavior
is to create scrollback as long as the top margin is the top row and the
cursor is on the bottom margin (wherever that may be).
Fixes#1990
This fixes and adds a unit test for an edge case where when printing
over the same cell with the same hyperlink ID, we were unsetting the
cell hyperlink state.
This commit also adds a number of integrity checks to verify hyperlinks
remain in a consistent state.
Prevent bad input from causing repeated OutOfMemory errors by erroring
with NeedsRehash instead when there are unused dead IDs available.
Additionally, properly decrement PSL stats when reviving dead IDs.
