Introduce new api methods for experimental clients to use

Should help Josh Elsasser implement pull request https://github.com/joaotavora/eglot/issues/6.

* eglot.el (eglot--obj): Move upwards in file.
(eglot-server-ready-p): Tweak comment.
(eglot-initialization-options): New API defgeneric..
(eglot-client-capabilities): New API defgeneric.
(eglot--client-capabilities): Remove.
(eglot--connect): Call new API methods here.

Do rust's rls hack properly with new class-based api

* eglot.el (eglot-server-ready-p): New API method.
(eglot-handle-request, eglot-handle-notification): New
defgeneric's.
(eglot--ready-predicates, eglot--server-ready-p): Remove.
(eglot--async-request): Call eglot-server-ready-p.
(eglot--request): Tweak comment.
(eglot--rls-probably-ready-for-p): Remove.
(eglot-server-ready-p eglot-rls): Adapts earlier
eglot--rls-probably-ready-for-p.
(eglot-handle-notification eglot-rls): Specialize to eglot-rls.
(eglot-rls): New eglot-lsp-server subclass.

* eglot-tests.el (auto-detect-running-server)
(auto-reconnect, basic-completions)
(hover-after-completions): Use eglot--interactive

Use an eieio class to represent a server.

Allow clients of eglot.el to use specific server classes to represent
experimental servers.

Wherever you used to read "proc" you now probably read "server",
unless it's really the process properties that are sought after.

Should help Josh Elsasser implement pull request https://github.com/joaotavora/eglot/issues/6.

* eglot-tests.el (eglot--call-with-dirs-and-files)
(auto-detect-running-server, auto-reconnect, basic-completions)
(hover-after-completions): Adapt to server defclass instead of
proc.

* eglot.el
(eglot-server-programs): Add docstring.
(eglot--processes-by-project): Removed.
(eglot--servers-by-project): New variable.
(eglot--current-process): Removed.
(eglot--current-server): New function.
(eglot-server): New class.
(cl-print-object eglot-server): New method.
(eglot--current-process-or-lose): Removed.
(eglot--current-server-or-lose): New function.
(eglot--define-process-var): Remove.
(eglot--make-process): Rework.
(eglot--project-short-name): Remove.
(eglot--connect): Rework.
(eglot--interactive): Rework to allow custom classes.
(eglot, eglot-reconnect, eglot--process-sentinel)
(eglot--process-filter, eglot-events-buffer, eglot--log-event):
Rework.
(eglot--process-receive): Removed.
(eglot--server-receive): New function.
(eglot--send): Renamed from eglot--process-send.
(eglot--process-send): Removed.
(eglot-forget-pending-continuations)
(eglot-clear-status, eglot--call-deferred)
(eglot--server-ready-p, eglot--async-request, eglot--request)
(eglot--notify, eglot--reply, eglot--managed-mode-onoff)
(eglot--maybe-activate-editing-mode, eglot--mode-line-format):
Rework.
(eglot-shutdown): Rework.
(eglot-handle-notification *, eglot-handle-request *)
(eglot--register-unregister)
(eglot--signal-textDocument/didOpen)
(eglot--signal-textDocument/didClose)
(eglot--signal-textDocument/willSave)
(eglot--signal-textDocument/didSave)
(xref-backend-identifier-completion-table)
(xref-backend-definitions, xref-backend-references)
(xref-backend-apropos, eglot-completion-at-point)
(eglot-help-at-point, eglot-eldoc-function, eglot-imenu)
(eglot-rename)
(eglot--register-workspace/didChangeWatchedFiles)
(eglot--unregister-workspace/didChangeWatchedFiles)
(eglot--rls-probably-ready-for-p, eglot-handle-notification):
Rework (proc->server)

fixup

* eglot-tests.el (eglot--call-with-dirs-and-files)
(auto-detect-running-server, auto-reconnect, basic-completions)
(hover-after-completions):

* eglot.el (eglot--processes-by-project): Removed.
(eglot--servers-by-project): New variable.
(eglot--current-process): Removed.
(eglot--current-server): New function.

Introduce eglot-handle-request and eglot-handle-notification as api

* eglot.el (eglot--process-receive): Call eglot-handle-request and
eglot-handle-notification.
(eglot-handle-notification, eglot-handle-request): New generic
functions.
(eglot--server-window/showMessage)
(eglot--server-window/progress)
(eglot--server-telemetry/event, eglot--server-window/logMessage):
Convert to eglot-handle-notification.
(eglot-handle-request, eglot--server-client/registerCapability)
(eglot--server-client/unregisterCapability)
(eglot-handle-request): Convert to eglot-handle-request.

Fix a bug introduced in the previous commit

* eglot.el (eglot--format-markup): Ignore errors when calling
possibly unknown functions.
(eglot-completion-at-point): Use eglot--format-markup
(eglot--hover-info): Yak shaving

Rewrite a couple of defs and shave a yak

* eglot.el (eglot--define-process-var): Simplify.
(eglot--format-markup): Rewrite.
(eglot--warn, eglot--pos-to-lsp-position)
(eglot--lsp-position-to-point, eglot--server-capable)
(eglot--maybe-activate-editing-mode)
(eglot--server-textDocument/publishDiagnostics)
(eglot--server-workspace/applyEdit, eglot--hover-info): Yak
shaving.

* eglot.el (version): bump to 0.4

Add some completion tests for pyls

* eglot-tests.el (edebug): Require it.
(eglot--call-with-dirs-and-files): Simplify.
(eglot--call-with-test-timeout): Don't timeout if edebug.
(auto-detect-running-server, auto-reconnect): Skip unless rls is
found.
(basic-completions): New test.
(hover-after-completions): New failing test.

* eglot.el (eglot-eldoc-function): Force write
eldoc-last-message, for tests sake.

Handle managed buffers in own process var

This should save some trouble when testing noninteractively.  Because
eglot--shutdown didn't turn off the minor mode, test code running
immediately after it could still make didClose requests, for example.
The sentinel was the previous responsible for turning off the minor
mode and didn't get a chance to run in that case. Now eglot--shutdown
is also responsible for turning off the minor mode.

All this should be hidden behind eglot--managed-mode-onoff.

* eglot.el (eglot--managed-buffers): New process-local variable.
(eglot--process-sentinel): Turn off managed mode.
(eglot--managed-mode-onoff): New function.
(eglot--managed-mode): Don't offer to kill server here.
(eglot--buffer-managed-p): Remove.
(eglot--maybe-activate-editing-mode): Activate mode here.
(eglot-shutdown): Turn off minor mode here.
(eglot--server-window/progress): Simplify slightly.

Robustness fixes for the request mechanism

* eglot.el (eglot--async-request): Pass actual id to eglot--log-event
(eglot--request): Also cancel any continuations.

Check capabilities before sending :completionitem/resolve

* eglot.el (eglot--server-capable): Rewrite.
(eglot-completion-at-point): Check caps before sending
:completionItem/resolve

Better decide what text exactly to present as completions

For inserting, :insertText takes precedence over :label.
For annotating, first sentence of :documentation, then :detail,
then :kind name.

Also remember to send didChange in the :exit-function

* eglot.el (eglot-completion-function): Rework main function and
:annotation-function, and :exit-function

* eglot.el (eglot-clear-status): remember to update modeline

Collect regions to change as markers, then edit

* eglot.el (eglot--lsp-position-to-point): Accept MARKER optional
arg.
(eglot--range-region): Accept MARKERS optional arg. Return a list.
(eglot--server-textDocument/publishDiagnostics)
(eglot--hover-info, eglot-eldoc-function): eglot--range-region
returns a list, not a cons.
(eglot--apply-text-edits): First collect regions as markers, then
edit.

GitHub-reference: close https://github.com/joaotavora/eglot/issues/4

If we're going to send rootpath, better send an absolute one

javascript-typescript-langserver complained.

* eglot.el (eglot--connect): Use expand-file-name.

Robustify timer handling for eglot--async-request

This basically cherry-picks an ealier commit for the jsonrpc-refactor
branch:
  a2aa1ed..: João Távora 2018-05-18 Robustify timer handling for jrpc-async-request

* jrpc.el (jrpc--async-request): Improve timeout handling. Return a list (ID TIMER)
(jrpc--request): Protect against user-quits, cancelling timer

Simplify some infrastructure fucntions

* eglot.el (eglot--contact): Simplify docstring.
(eglot--make-process): Simplify.
(eglot--connect): Simplify.
(eglot--interactive): Simplify and correct odd bug.
(eglot--process-sentinel): Correct messages. Delete before
attempting reconnection.
(eglot-shutdown): Simplify.

* eglot.el (version): bump to 0.3

Make it work on windows

Apparently passing :coding 'no-conversion to make-process on windows
is essential to receive any text at all in the process filter.

Also needed to tweak uri-to-path and path-to-uri.

Thanks to lsp-mode.el for these hints

* eglot.el (eglot--make-process): Pass :coding 'no-conversion to
make-process.
(eglot--path-to-uri): Add a forward slash if windows-nt.
(eglot--uri-to-path): Remove a forward slash if windows-nt.
(eglot--server-textDocument/publishDiagnostics): Simplify and use
eglot--uri-to-path.

Fix eglot--error and eglot--message helpers

* eglot.el (eglot--error, eglot--message):
Safely interpret %s.

* eglot.el (eglot--lambda): add missing indent spec.

Simplify some function calling infrastructure

eglot--mapply is a confusing abstraction. Hide some of that confusion
behind eglot--lambda. More stably dispatch server notifications and
requests without introspecting their contents.

* eglot.el (eglot--process-receive): Simplify.
(eglot--async-request): Improve doc.
(eglot--request): Simplify.
(eglot--mapply): Remove.
(xref-backend-identifier-completion-table)
(xref-backend-definitions, xref-backend-references)
(xref-backend-apropos, eglot-completion-at-point)
(eglot-eldoc-function, eglot-imenu, eglot--apply-text-edits):
Don't use eglot--mapply, use normal mapcar/mapc.

Replace eglot--with-lsp-range with a function and pcase-let

* eglot.el (eglot--with-lsp-range): Remove.
(eglot--range-region): New function.
(eglot--server-textDocument/publishDiagnostics)
(eglot--hover-info, eglot-eldoc-function)
(eglot--apply-text-edits): Use it.

Add php's php-language-server to built-in guessed servers

Closes https://github.com/joaotavora/eglot/issues/1. The problem in that issue is that php-language-server has a
bug when it's not passed it the deprecated ":rootPath" field. The bug
doesn't happen if the ":processId" field is also absent. Eglot was
triggering the bug, because it didn't pass ":rootPath", but there's
nothing wrong in doing so.

* README.md: Add php-language-server to the built-in list.

* eglot.el (eglot-server-programs): Add php-language-server.
(eglot--connect): Also pass (deprecated) rootPath.

Bump version and slightly improve doc

* eglot.el: Bump version. Add nicer Commentary header.
(eglot): Improve docstring.

* README.md: Update

More quietly report request timeouts as events

* eglot.el (eglot--sync-request): Use eglot--log-event

Shutdown server if connection initialization fails

Also tweak autoreconnection logic

* eglot.el (eglot--connect): Immediately `eglot-shutdown` if
connection initialization failed. Don't treat interactive calls
specially.
(eglot--process-sentinel): Tweak messages.

Fix a ridiculous bug when generating transient projects

* eglot.el (eglot--find-current-process, eglot--interactive): Fix
horrible bug.

Support didchangewatchedfiles with dynamic registration

RLS uses this, presumaly for knowing about Cargo.toml changes and stuff.

* README.md: Update protocol compliance.

* eglot.el (filenotify): Require it.
(eglot--file-watches): New process-local var.
(eglot--process-sentinel): Kill all watches
(eglot--register-unregister): New helper.
(eglot--server-client/registerCapability): Simplify.
(eglot--server-client/unregisterCapability): New method.
(eglot--register-workspace/didChangeWatchedFiles)
(eglot--unregister-workspace/didChangeWatchedFiles): New
capability.
(eglot--client-capabilities): Update.

Remove an unused variable

* eglot.el (eglot--expect-carriage-return): Get rid of this.

Now send willsavewaituntil

* eglot.el (eglot--client-capabilities): Report willSaveWaitUntil.
(eglot--server-workspace/applyEdit): Fix docstring.
(eglot--signal-textDocument/willSave): Send willSaveWaitUntil
(eglot--signal-textDocument/didOpen)
(eglot--signal-textDocument/didClose): Don't eglot--obj.
(eglot--apply-text-edits): Simplify. Use current buffer.
(eglot--apply-workspace-edit): Use new eglot--apply-text-edits.

Don't define a menu if nothing to show there for now

* eglot.el (eglot-menu): Remove it.
(eglot--mode-line-format): Don't define a menu.

Use rls in travis ci and add actual tests

Also run a hook when connected

* eglot-tests.el (eglot--with-dirs-and-files)
(eglot--make-file-or-dirs, eglot--call-with-dirs-and-files)
(eglot--find-file-noselect): New helpers.
(auto-detect-running-server, auto-reconnect): New actual tests.

* eglot.el (eglot-connect): Run hook when connected
(eglot-connect-hook): New variable

* .travis.yml: Use rust stable and install rls

* README.md: Update mention of automated tests

Fix automatic project creation

* eglot.el (eglot): Take PROJECT arg. Return process.
(eglot--interactive): Returns a project.

Work with any old directory, no formal project needed

Actually, uses a "transient project" which project-current returns if
desperate.

* README.md: Update

* eglot.el (eglot--current-process)
(eglot--current-process-or-lose): Simplify.
(eglot): Maybe prompt user for project.

Ask server for textdocument/signaturehelp if it supports it

* eglot.el (eglot--client-capabilities): Capable of signature Help.
(eglot--sig-info): Helper for eglot-eldoc-function.
(eglot-eldoc-function): Send textDocument/signatureHelp

* README.md: Update to mention textDocument/signatureHelp

Fix copyright header. obviously not since 2003

Reinstate the catch/loop/throw idiom in eglot-request

This reverts parts of commit fabee14ed5b32c30c6ac5cb1ce88f387522a6a1e.

Unfortunately, this may cause problems when calling the error
callbacks directly as in the process sentinel. In that particular
scenario the accept-process-output won't have return, because no
output has is being handled. Consequently, if we're unlucky, we have
another 30 seconds to way before the flag is tested and the loop
exits.

* eglot.el (eglot-request): Use catch/loop/throw again

New command eglot-help-at-point and a readme update

* README.md (Commands and keybindings): New section.

* eglot.el (eglot-eldoc-function): Use eglot--hover-info.
Don't care about kind in highlightSymbol
(eglot--hover-info): New helper.
(eglot-help-at-point): New command.

Get rid of catch/loop/throw idiom (suggested by thien-thi nguyen)

* eglot.el (eglot--process-filter)
(eglot--request): Replace catch/loop/throw idiom with let/test/loop/set

Rework autoreconnection logic

Can't be a global var, has to be a per process thing.

* eglot.el (eglot-autoreconnect): New defcustom
(eglot--inhibit-autoreconnect): Renamed from eglot--inhibit-autoreconnect
(eglot--connect): Run autoreconnect timer here.
(eglot--inhibit-auto-reconnect): Removed.
(eglot--process-sentinel): Don't run timer here. Rework.
(eglot, eglot-reconnect): Pass INTERACTIVE to eglot--connect.

Duh, json.el is in emacs, and json-mode.el is useless here

* eglot.el (Package-Requires): Don't require json-mode

Prepare to sumbit to gnu elpa

* eglot.el: Update headers.

(eglot--xref-make): fix use of cl-destructuring-bind.

Misc little adjustments for readability

* eglot.el (eglot--log-event, eglot--process-receive)
(eglot--xref-make, xref-backend-apropos): Use cl-destructuring-bind.
(eglot--server-window/showMessageRequest): Compact.

Support :completionitem/resolve

This is quite handy with company and company-quickhelp

* eglot.el (eglot-completion-at-point): Send
:completionItem/resolve

* README.md: Mention completionItem/resolve

Rename functions. eglot--request is now the synchronous one

* eglot.el (eglot--connect, eglot-shutdown)
(xref-backend-identifier-completion-table)
(xref-backend-definitions, xref-backend-references)
(xref-backend-apropos, eglot-completion-at-point, eglot-rename):
Call eglot--request.
(eglot--async-request): Renamed from eglot--request.
(eglot--request): Renamed from eglot--sync-request.
(eglot--TextDocumentIdentifier)
(eglot--VersionedTextDocumentIdentifier)
(eglot--TextDocumentPositionParams, eglot--TextDocumentItem):
Renamed from the more verbose eglot--current-buffer-* variante.
(eglot-rename, eglot-imenu, eglot-eldoc-function)
(eglot-completion-at-point, xref-backend-definitions)
(xref-backend-identifier-at-point)
(eglot--signal-textDocument/didSave)
(xref-backend-identifier-completion-table)
(eglot--signal-textDocument/didClose)
(eglot--signal-textDocument/didOpen)
(eglot--signal-textDocument/didChange): Use new function names.

Friendlier m-x eglot

* eglot.el (eglot-server-programs): Renamed from eglot-executables
(eglot--interactive): Redesign
(eglot): Docstring.
(eglot--connect): Now a synchronous gig.
(eglot--interactive): Friendlier.
(eglot): Improve docstring, rework a bit.
(eglot-reconnect): Rework a bit.
(eglot--process-sentinel): Insert "byebye" ruler here.

* README.md: Update

Improve eglot-eldoc-function

Use the :range key if the server provided it. Also simplify code with
a new eglot--with-lsp-range macro.

* eglot.el (eglot--format-markup): Tweak comment.
(eglot--with-lsp-range): New helper macro.
(eglot--server-textDocument/publishDiagnostics)
(eglot--apply-text-edits): Use it.
(eglot-eldoc-function): Use range if server provides it.

Reduce log chatter

* eglot.el (eglot--process-sentinel, eglot--request): Use
eglot--log-event.
(eglot--log-event): Print "message" if type unknown.
(eglot--debug, eglot--log): Remove.
(eglot--server-window/logMessage, eglot--server-telemetry/event):
Make noops.
(eglot--call-deferred): Also reduce chatter here.

Only call deferred actions after a full message has been received

Otherwise it can be quite wasteful.

* eglot.el (eglot--process-filter): Don't eglot--call-deferred here.
(eglot--process-receive): Do it here.

Resist server failure during synchronous requests

Calling the error handler unprotected could lead to the rest of the
sentinel not running at all. This defeated the auto-reconnection in
Rust, for example.

* eglot.el (eglot--process-sentinel): Rework.

Simplify mode-line updating logic

* eglot.el (eglot--define-process-var): Simplify.
(eglot--short-name, eglot--spinner, eglot--status): Don't
auto-update mode-line.
(eglot--process-receive): Update it here.

More rls-specifics: update flymake diags when indexing done

RLS could/should report diagnostics for every opened file, even if
there aren't any problems. Because it doesn't, loop for every buffer
managed by the process and call eglot--current-flymake-report-fn

* eglot.el
(eglot--server-window/progress): Call eglot--current-flymake-report-fn

Adjust flymake integration

When opening a new file (signalling textDocument/didOpen) it makes
sense to call the flymake callback (if it exists) with no diagnostics,
just to get rid of that "Wait", since we don't know if later in this
callback cycle the server will ever report new diagnostics.

* eglot.el (eglot--managed-mode): Don't call flymake-mode or eldoc-mode
(eglot--managed-mode-hook): Add them here.
(eglot--maybe-activate-editing-mode): Call flymake callback.
(eglot--server-textDocument/publishDiagnostics): Set unreported
diagnostics to nil if invoking callback.

Shorten summary line to appease package-lint.el

More correctly setup rust-mode-related autoloads

By autoloading the add-hook form and the eglot--setup-rls-idiosyncrasies
definition, a user can start rust-mode without loading eglot.el along
with it.

* eglot.el (rust-mode-hook)
(eglot--setup-rls-idiosyncrasies): Wrap in autoloaded progn.

Add minimal headers, commentary and autoloads

Fancier rls spinner

* eglot.el (eglot--mode-line-format): Use (nth 3) of
eglot--spinner.
(eglot--server-window/progress): Save detail message in spinner.

New "deferred requests" that wait until server is ready

Calling textDocument/hover or textDocument/documentHighlight before
the server has had a chance to process a textDocument/didChange is
normally useless. The matter is worse for servers like RLS which only
become ready much later and send a special notif for it (see
https://github.com/rust-lang-nursery/rls/issues/725).

So, keeping the same coding style add a DEFERRED arg to eglot--request
that makes it maybe not run the function immediately. Add a bunch of
logic for probing readiness of servers.

* README.md: Update

* eglot.el (eglot--deferred-actions): New process-local var.
(eglot--process-filter): Call deferred actions.
(eglot--request): Rewrite.
(eglot--sync-request): Rewrite.
(eglot--call-deferred, eglot--ready-predicates)
(eglot--server-ready-p): New helpers.
(eglot--signal-textDocument/didChange): Set spinner and call
deferred actions.
(eglot-completion-at-point): Pass DEFERRED to eglot-sync-request.
(eglot-eldoc-function): Pass DEFERRED to eglot-request
(eglot--rls-probably-ready-for-p): New helper.
(rust-mode-hook): Add eglot--setup-rls-idiosyncrasies
(eglot--setup-rls-idiosyncrasies): New helper.

Call eglot-eldoc-function after completion finishes

* eglot.el (eglot-completion-at-point): Call
eglot-eldoc-function after completion finishes.

Simplify `eglot-shutdown`

* eglot.el (eglot, eglot-reconnect)
(eglot--managed-mode): Call new eglot-shutdown.
(eglot-shutdown): Simplify.
(eglot--process-sentinel): Also call error functions.
(eglot--process-filter): Reindent.

Get rid of eglot-mode

* eglot.el (eglot--managed-mode): Don't call eglot-mode. When
shutting down, offer to kill server.
(mode-line-misc-info): Update to use eglot--managed-mode

Simplify eglot--signal-textdocument/didchange

* eglot.el (eglot--recent-before-changes)
(eglot--recent-after-changes): Delete.
(eglot--recent-changes): New var.
(eglot--outstanding-edits-p, eglot--before-change)
(eglot--after-change): Rewrite.
(eglot--signal-textDocument/didChange): Rewrite.
(eglot--signal-textDocument/didOpen): Initialize
buffer-local eglot--recent-changes here.

Fix odd bugs and tweak stuff

* eglot.el (eglot--log-event): Insert before markers.
(eglot--process-receive): Shave lines.
(xref-backend-references): Use cl-return-from.
(eglot--log-event): Simplify
(eglot-completion-at-point): Saner annotation

Support workspace/applyedit

* eglot.el (eglot--reply): Don't send result or error if not
provided.
(eglot--server-workspace/applyEdit): New server method.
(eglot--apply-text-edits): Rework.
(eglot--apply-workspace-edit): New helper.
(eglot-rename): Simplify.

Support textdocument/rename

* README.md: Mention rename support.

* eglot.el (eglot--uri-to-path): Handle uri hidden in keywords.
(eglot--apply-text-edits): New helper.
(eglot-rename): New interactive command.
(eglot--client-capabilities): Add rename capability.

Reasonable textdocument/documenthighlight support

* README.md: Update.

* eglot.el (eglot--current-buffer-TextDocumentPositionParams): New
helper.
(xref-backend-identifier-completion-table): Refactor a bit.
(xref-backend-identifier-at-point): Use when-let and
eglot--current-buffer-TextDocumentPositionParams
(xref-backend-definitions, xref-backend-references): Refactor a
bit.
(eglot-completion-at-point): Use
eglot--current-buffer-TextDocumentPositionParams
(eglot-eldoc-function): Rewrite to handle
textDocument/documentHighlight.
(eglot--highlights): New variable.
(eglot--client-capabilities): Update with support for documentHighlight.

Fix odd bugs

* eglot.el (eglot--process-receive, eglot--request): Set status to
actual error message.
(eglot--managed-mode): Manage imenu-create-index-function
correctly.
(eglot--mode-line-format): Print error status.

When killing server, always wait 3 seconds

* eglot.el (eglot--request): Accept TIMEOUT param.

Try to fix some textdocument/completion bugs

* eglot.el (eglot-completion-at-point): Rework slightly.

Half-decent imenu support via textdocument/documentsymbol

* README.md: Update capability

* eglot.el (eglot--lsp-position-to-point): New function.
(eglot--managed-mode): Handle imenu-create-index-function.
(eglot--server-textDocument/publishDiagnostics): Use
eglot--lsp-position-to-point.
(eglot-imenu): New function.
(eglot--client-capabilities): Capable of documentSymbol.

Only request stuff that server says it's capable of

* eglot.el (eglot--server-capable): New helper.
(eglot-xref-backend)
(xref-backend-identifier-completion-table)
(xref-backend-references, xref-backend-apropos)
(eglot-completion-at-point, eglot-eldoc-function): Use it.

Simplify mode-line code with a helper.

* eglot.el (eglot--mdoe-line-props): New helper.
(eglot--mode-line-format): Use it.

Get rid of eglot--buffer-open-count

Hasn't really proved useful yet.

* eglot.el (eglot--buffer-open-count): Remove.
(eglot--signal-textDocument/didOpen)
(eglot--signal-textDocument/didClose): Simplify.

Get rid of eglot--special-buffer-process

Hasn't really proved useful yet.

* eglot.el (eglot--special-buffer-process): Delete.
(eglot--current-process): Simplify.
(eglot--events-buffer): Simplify.

* eglot.el: reformat to shave off some lines.

Fix bug in hover support

* eldoc.el (eglot-eldoc-function): Use eglot--format-markup.
(subr-x): Require it.
(eglot--format-markup): Pacify byte-compiler.

Clean up client capabilities

* eglot.el (eglot--client-capabilities): Clean up client
capabilities.

Half-baked textdocument/hover support

* eglot.el (eglot--format-markup): New helper.
(eglot--managed-mode): Handle eldoc-documentation-function.
(eglot-eldoc-function): New function.

* README.md: update

Tweak the async request engine.

* eglot.el (eglot--request): Return the continuation id.
(eglot--lambda): Move up in the file.
(eglot--sync-request): Use a catch-tag.

Explain why didopen on after-revert-hook is a bad idea

The reason is that the global find-file-hook is called again, and that
already does the didOpen. Too many didOpen's would be bad.

* eglot.el (eglot--managed-mode): Remove commented lines.

Half-decent completion support

* README.md: Update.

* eglot.el (eglot--kind-names): New variable.
(eglot--managed-mode): Handle completion-at-point-functions.
(eglot-completion-at-point): New function.

Solve another textdocument/didchange bug

* eglot.el (eglot--signal-textDocument/didChange): Rework a bit.
(eglot--after-change): Store the actual after-text in the
eglot--recent-after-changes.

Support javascript's javascript-typescript-langserver

* README.md: Improve a bit

* eglot.el (eglot--make-process): Take MANAGED-MAJOR-MODE arg
(eglot-executables): Add basic javascript support.
(eglot--connect): Pass mode to eglot--make-process
(eglot--interactive): Check that guessed command is a listp.
(eglot): Minor improvement to message.
(eglot--current-buffer-TextDocumentItem): Guess language from mode
symbol.

Increase request timeout length to 10 seconds

* eglot.el (eglot-request-timeout): New var.
(eglot--request): Use it.

Workaround two suspected emacs bugs

* eglot.el (eglot--process-filter): Use a proper unique tag. Use
unwind-protect.
(eglot--sync-request): Rework.
(eglot--server-client/registerCapability): Use a proper done tag.

Etoomanylambdas

* eglot.el (eglot--sync-request): Remove a lambda.

Fix the odd bug here and there

* eglot.el (eglot--connect): Activate editing mode where
applicable here.
(eglot, eglot-reconnect): Not here or here.
(eglot--process-sentinel): Catch auto-reconnect errors.
(eglot--notify): Dont send 'id=null', it messes up js's lsp
(eglot--reply): Do send id here.
(eglot--log-event): Simplify protocol. Complexify implementation.
(eglot--process-receive, eglot--process-send): Simplify
eglot--log-event call.
(eglot--request, eglot--notify, eglot--reply): Simplify
eglot--process-send call
(eglot--server-client/registerCapability): Fix bug when replying
with wrong id.
(eglot--xref-reset-known-symbols): Take DUMMY arg.

Half-decent xref support

* eglot.el
(eglot--xref-known-symbols): New hacky var.
(eglot--xref-reset-known-symbols): New helper.
(xref-find-definitions, xref-find-references): Advise after to
call the new helper.
(xref-backend-identifier-completion-table): Rework.
(eglot--xref-make): New helper.
(xref-backend-definitions): Use it.
(xref-backend-references, xref-backend-apropos): Implement.
(eglot--obj): Add a debug spec.
(eglot--lambda): Add debug spec.

Very basic xref support

* eglot.el (eglot--pos-to-lisp-position): Move up.
(eglot--mapply, eglot--lambda): New helpers.
(eglot--uri-to-path): New helper.
(eglot--managed-mode): Manage xref-backend-functions.
(eglot-xref-backend): New function.
(xref-backend-identifier-completion-table)
(xref-backend-identifier-at-point)
(xref-backend-definitions): New methods.
(xref-backend-references)
(xref-backend-apropos): New methods, still unimplemented.

New helper eglot--sync-request

This should help with xref definitions

* eglot.el (eglot--request): Rework a bit. Continuation is always
cleared on timeout, regardless of user-supplied fn.
(eglot--sync-request): New function.
(eglot--process-receive): watch out for vector results.

Cleanup mistake with textdocumentitem and textdocumentidentifier

Also introduce eglot--path-to-uri

* eglot.el (eglot--path-to-uri): Rename from eglot--uri and rework.
(eglot--connect): Use it.
(eglot--current-buffer-TextDocumentIdentifier): New function.
(eglot--current-buffer-VersionedTextDocumentIdentifier)
(eglot--signal-textDocument/didChange)
(eglot--signal-textDocument/didClose)
(eglot--signal-textDocument/willSave)
(eglot--signal-textDocument/didSave): Use it.

Handle dynamic registration in general (but nothing specific yet)

* eglot.el (eglot--server-client/registerCapability): Implement.
(eglot--register-workspace/didChangeWatchedFiles): Dummy registrator.

Honour textdocumentsync

* eglot.el (eglot--signal-textDocument/didChange): Honour textDocumentSync

Be quite explicit about our lack of capabilities right now

* eglot.el (eglot--client-capabilities): Spread out.

Use rooturi instead of rootpath

* eglot.el (eglot--connect)
(eglot--current-buffer-VersionedTextDocumentIdentifier): Use
eglot--uri.
(eglot--uri): New function.

Make reported capabilities into its own function

* eglot.el (eglot--client-capabilities): New function.
(eglot--connect): Use it.

Include source info in diagnostics

* eglot.el (eglot--server-textDocument/publishDiagnostics):
Include source info.

Reply to client/registercapability (don't handle it yet)

* eglot.el (eglot--server-client/registerCapability): New
function.