The language server may return `None` for a definition/reference
request. The parent commits introduced a regression for these commands
when a server did not provide locations. With this change a server may
respond with `null` and its locations will instead not be considered.
Fixes#12732
This covers all goto-definition-like commands: declaration, definition,
type definition and implementation.
Closes#11689
Co-authored-by: j <junglerobba@jngl.one>
<https://github.com/helix-editor/helix/pull/11486> introduced a Location
type in the LSP commands module which unified helpers like
`jump_to_location`. This change moves `OffsetEncoding` onto that type.
`SymbolInformationItem` and `PickerDiagnostic` already had fields for
carrying the offset encoding. We would want a similar setup for goto
definition/references as well (for supporting multiple language servers
with that feature) but those use the `Location` type. By moving
`OffsetEncoding` onto `Location` we make future changes to allow
mulitple language servers possible for goto definition/references
features and also simplify some calls for symbols and diagnostics.
The positions passed to `Transaction::change_by_selection` should be
character indexes. `edit_diff` is meant to track the number of
characters that should be deleted to erase the file name that has been
typed so far (if any). Mistakenly this was using `str::len` which is
the byte count. This fixes a bug that could cause more text to be
deleted than intended or a panic when completing a directory with
multi-byte characters like 'éclair'.
This change also moves the `edit_diff` binding out of the loop since
it's now performing some non-trivial work (counting characters, where
before it was just accessing the pre-computed number of bytes).
This change refactors the DAP `Event` type, the `helix_dap` module and
the `helix_dap::transport` module to be closer to the equivalent
implementations in `helix_lsp`. The DAP `Event` type is similar to LSP's
`Notification` so this change rewrites the enum as a trait which is
implemented by empty types (for example `enum Initialized {}`).
`Event` is then reintroduced as an enum in `helix_dap` with a helper
function to convert from the `Event` as the transport knows it. By
separating the definitions of `Event` between lib and transport, we can
handle incoming events which are not known to our `Event` enum. For
example debugpy sends `"debugpySockets"` which is unknown. With this
change, unknown events are discarded with an info-level log message.
The `Request` type was already a trait but did not have an enum with the
known values. This change also introduces a `helix_dap::Request` enum
similar to `helix_dap::Event`. This resolves a TODO comment about
avoiding `unwrap` when parsing the request's arguments.
These functions are the equivalent of 23b424a46 for grapheme clusters.
In order to add the `is_grapheme_boundary` function we also need to
query whether a byte index lies on a character boundary, so this change
also adds `is_char_boundary`.
Previously you could use `<A-a><A-b>` to jump to a label "ab". We should
not treat characters with modifiers the same as characters without.
With this change the `<A-a>` input exits out of the jumping on-next-key.
Fixes#12695
The new `RopeSliceExt::ceil_char_boundary` from the parent commits can
be used to implement `RopeSliceExt::byte_to_next_char` when used with
`RopeSlice::byte_to_char`. That function had only one caller and that
caller will eventually disappear when we switch to Ropey v2 and drop
character indexing, so we can drop `byte_to_next_char` now and replace
its caller with `byte_to_char` plus `ceil_char_boundary`.
This change keeps the unit tests for `byte_to_next_char` and checks them
against a polyfill of `byte_to_char` plus `ceil_char_boundary` to ensure
that `byte_to_next_char`'s intended behavior is not changed.
This is a good example use-case of the `floor_char_boundary` and
`ceil_char_boundary` functions added in the parent commit. In the
single-width, single-selection case in `goto_file` we cap the search
to either the current line or 1000 bytes before or after the cursor
(whichever case comes earlier). That byte index might not lie on a
character boundary so it needs to be fixed to either the prior or
later boundary.
These functions mimic `str::floor_char_boundary` and
`str::floor_char_boundary` (currently unstable under
`round_char_boundary`). They're useful for correcting a byte index
which may not lie on a character boundary. For example you might limit
a search within a slice to some fixed number of bytes. The fixed number
might not lie on a boundary though so it needs to be corrected to
either the earlier (floor) or later (ceil) boundary.
