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The crate containing the entry point is called alacritty, and the crate
containing everything else is called alacritty_terminal.
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Alacritty will now automatically reflow lines and shrink them when they
would usually exceed the new width of the terminal instead of
truncation.
If a line had to be truncated, it will also be reflown into the previous
line after growing the terminal width.
The reflow behavior when not at the bottom of the history is similar to
that of VTE and aims to keep the viewport stationary whenever possible.
Opposed to VTE, reflow will also be performed in the alternate screen
buffer.
There will be bugs when resizing the terminal emulator to a size smaller
than the prompt, though these issues were present in all terminal
emulators with reflow support.
This fixes #591.
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This resolves a lot of NLL issues, however full NLL will be necessary to
handle a couple of remaining issues.
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There were some unneeded codeblocks and TODO/XXX comments in the code
that have been removed. All issues marked with TODO/XXX have either been
already resolved or tracking issues exist.
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Now, only cells that have been used are cleared. This is achieved by
using a "occupied" memo on the Row itself. The value, `occ`, is updated
wherever the Row is accessed mutably, and it's cleared to zero in
Row::reset.
The tests for grid scroll_up and scroll_down were updated to include a
test on the value `occ` and slightly refactored, but are otherwise
equivalent to the previous implementation of those tests.
Because of the change to the `Row` struct, the ref tests were updated so
Deserialization keeps working as expected.
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Resolves #1337
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This enforces the invariant that Row::Grow is only called when the row
actually needs to be grown.
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BCE was broken in attempt to optimize row clearing. The fix is to revert
to passing in the current cursor state when clearing.
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Supporting selections with scrollback has two major components:
1. Grid needs access to Selection so that it may update the scroll
position as the terminal text changes.
2. Selection needs to be implemented in terms of buffer offsets -- NOT
lines -- and be updated when Storage is rotated.
This commit implements the first part.
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Things that do not work
- Limiting how far back in the buffer it's possible to scroll
- Selections (need to transform to buffer offsets)
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In addition to a marginal performance improvement, this simplifies some
logic in the Term implementation since now the Grid fully handles row
recycling.
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This is part of some cleanup for the grid module as a whole.
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