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diff --git a/vim/pack/downloads/opt/lsp/doc/lsp.txt b/vim/pack/downloads/opt/lsp/doc/lsp.txt new file mode 100644 index 0000000..0d39a35 --- /dev/null +++ b/vim/pack/downloads/opt/lsp/doc/lsp.txt @@ -0,0 +1,2001 @@ +*lsp.txt* Language Server Protocol (LSP) Plugin for Vim9 + + +Author: Yegappan Lakshmanan (yegappan AT yahoo DOT com) +For Vim version 9.0 and above +Last change: Feb 13, 2024 + +============================================================================== +CONTENTS *lsp-contents* + + 1. Overview ................................. |lsp-overview| + 2. Requirements ............................. |lsp-installation| + 3. Usage .................................... |lsp-usage| + 4. Configuration............................. |lsp-configuration| + 5. Commands ................................. |lsp-commands| + 6. Insert Mode Completion ................... |lsp-ins-mode-completion| + 7. Diagnostics .............................. |lsp-diagnostics| + 8. Tag Function ............................. |lsp-tagfunc| + 9. LSP Formatting ........................... |lsp-format| + 10. Call Hierarchy ........................... |lsp-call-hierarchy| + 11. Autocommands ............................. |lsp-autocmds| + 12. Highlight Groups ......................... |lsp-highlight-groups| + 13. Debugging ................................ |lsp-debug| + 14. Custom Command Handlers .................. |lsp-custom-commands| + 15. Custom LSP Completion Kinds .............. |lsp-custom-kinds| + 16. Multiple Language Servers for a buffer ... |lsp-multiple-servers| + 17. Language Servers Features ................ |lsp-features| + 18. License .................................. |lsp-license| + +============================================================================== +1. Overview *lsp-overview* + +The Language Server Protocol (LSP) plugin implements a LSP client for Vim9. +Refer to the following pages for more information about LSP: + + https://microsoft.github.io/language-server-protocol/ + https://langserver.org/ + +This plugin needs Vim version 9.0 and after. You will need a programming +language specific server in your system to use this plugin. Refer to the above +pages for a list of available language servers for the various programming +languages. + +The Github repository for this plugin is available at: + + http://github.com/yegappan/lsp + +============================================================================== +2. Installation *lsp-installation* + +You can install this plugin directly from github using the following steps: + + $ mkdir -p $HOME/.vim/pack/downloads/opt + $ cd $HOME/.vim/pack/downloads/opt + $ git clone https://github.com/yegappan/lsp + $ vim -u NONE -c "helptags $HOME/.vim/pack/downloads/opt/lsp/doc" -c q + +or you can use any one of the Vim plugin managers (dein.vim, pathogen, vam, +vim-plug, volt, Vundle, etc.) to install and manage this plugin. + +To uninstall the LSP plugin, either use the uninstall command provided by the +plugin manager or manually remove the $HOME/.vim/pack/downloads/lsp directory. + +To use this plugin, add the following line to your .vimrc file: + + packadd lsp + +============================================================================== +3. Usage *lsp-usage* + +The following commands are provided: + +:LspCodeAction Apply the code action supplied by the language server + to the diagnostic in the current line. +:LspCodeLens Display all the code lens commands available for the + current file and apply the selected command. +:LspDiag current Display the diagnostic message for the current line. +:LspDiag first Jump to the first diagnostic message for the current + buffer. +:LspDiag here Jump to the next diagnostic message in the current + line. +:LspDiag highlight disable + Disable highlighting lines with a diagnostic message + for the current Vim session. +:LspDiag highlight enable + Enable highlighting lines with a diagnostic message + for the current Vim session. +:LspDiag last Jump to the last diagnostic message for the current + buffer. +:LspDiag next Jump to the next diagnostic message for the current + buffer after the current cursor position. +:LspDiag nextWrap Jump to the next diagnostic message for the current + buffer after the current cursor position. + Wrap back to the first message when no more messages + are found. +:LspDiag prev Jump to the previous diagnostic message for the + current buffer before the current current position. +:LspDiag prevWrap Jump to the previous diagnostic message for the + current buffer before the current current position. + Wrap back to the last message when no previous + messages are found. +:LspDiag show Display the diagnostics messages from the language + server for the current buffer in a location list. +:LspDocumentSymbol Display the symbols in the current file in a popup + menu and jump to the location of a selected symbol. +:LspFold Fold the current file +:LspFormat Format a range of lines in the current file using the + language server. The default range is the entire + file. See |lsp-format| for more information. +:LspGotoDeclaration Go to the declaration of the symbol under cursor +:LspGotoDefinition Go to the definition of the symbol under cursor +:LspGotoImpl Go to the implementation of the symbol under cursor +:LspGotoTypeDef Go to the type definition of the symbol under cursor +:LspHighlight Highlight all the matches for the keyword under cursor +:LspHighlightClear Clear all the matches highlighted by :LspHighlight +:LspHover Show the documentation for the symbol under the cursor + in a popup window. +:LspIncomingCalls Display the list of symbols calling the current symbol + in a window. +:LspInlayHints Enable or disable inlay hints. +:LspOutgoingCalls Display the list of symbols called by the current + symbol in a window. +:LspOutline Show the list of symbols defined in the current file + in a separate window. +:LspPeekDeclaration Open the declaration of the symbol under cursor in a + popup window. +:LspPeekDefinition Open the definition of the symbol under cursor in a + popup window. +:LspPeekImpl Open the implementation of the symbol under cursor in + a popup window. +:LspPeekReferences Display the list of references to the symbol under + cursor in a popup window. +:LspPeekTypeDef Open the type definition of the symbol under cursor in + a popup window. +:LspRename Rename the current symbol +:LspSelectionExpand Expand the current symbol range visual selection +:LspSelectionShrink Shrink the current symbol range visual selection +:LspServer Command to display the status and messages from a + language server and to restart the language server. +:LspShowAllServers Display the status of all the registered language + servers. +:LspShowReferences Display the list of references to the keyword under + cursor in a new location list. +:LspShowSignature Display the signature of the symbol under cursor. +:LspSubTypeHierarchy Display the sub type hierarchy in a popup window. +:LspSuperTypeHierarchy Display the super type hierarchy in a popup window. +:LspSwitchSourceHeader Switch between a source and a header file. +:LspSymbolSearch Perform a workspace wide search for a symbol +:LspWorkspaceAddFolder {folder} + Add a folder to the workspace +:LspWorkspaceListFolders + Show the list of folders in the workspace +:LspWorkspaceRemoveFolder {folder} + Remove a folder from the workspace + +============================================================================== +4. Configuration *lsp-configuration* + *LspAddServer()* *g:LspAddServer()* + +To use the plugin features with a particular file type(s), you need to first +register a language server for that file type(s). + +To register one or more language servers, use the LspAddServer() function with +a list of lanaguge server details in the .vimrc file. + +To register a language server, add the following lines to your .vimrc file +(use only the language servers that you need from the below list). +If you used [vim-plug](https://github.com/junegunn/vim-plug) to install the +LSP plugin, the steps are described later in this section: > + + vim9script + var lspServers = [ + { + name: 'typescriptls', + filetype: ['javascript', 'typescript'], + path: '/usr/local/bin/typescript-language-server', + args: ['--stdio'] + }, + { + name: 'pythonls', + filetype: 'python', + path: '/usr/local/bin/pyls', + args: ['--check-parent-process', '-v'] + } + ] + LspAddServer(lspServers) +< +Depending on the location of the typescript and python pyls language servers +installed in your system, update the "path" in the above snippet +appropriately. + +Another example, for adding the language servers for the C, C++, Golang, Rust, +Shell script, Vim script and PHP file types: > + + vim9script + var lspServers = [ + { + name: 'clangd', + filetype: ['c', 'cpp'], + path: '/usr/local/bin/clangd', + args: ['--background-index'] + }, + { + name: 'golang', + filetype: ['go', 'gomod', 'gohtmltmpl', 'gotexttmpl'], + path: '/path/to/.go/bin/gopls', + args: [], + syncInit: true, + }, + { + name: 'rustls', + filetype: ['rust'], + path: '/path/to/.cargo/bin/rust-analyzer', + args: [], + syncInit: true, + }, + { + name: 'bashls', + filetype: 'sh', + path: '/usr/local/bin/bash-language-server', + args: ['start'] + }, + { + name: 'vimls', + filetype: ['vim'], + path: '/usr/local/bin/vim-language-server', + args: ['--stdio'] + }, + { + name: 'phpls', + filetype: ['php'], + path': '/usr/local/bin/intelephense', + args: ['--stdio'], + syncInit: true, + initializationOptions: { + licenceKey: 'xxxxxxxxxxxxxxx' + } + } + ] + LspAddServer(lspServers) +< +To add a language server, the following information is needed: + + *lsp-cfg-name* + name (Optional) name of the language server. Can by any + string. Used in LSP messages and log files. + *lsp-cfg-path* + path complete path to the language server executable + (without any arguments). + *lsp-cfg-args* + args a |List| of command-line arguments passed to the + language server. Each space separated language server + command-line argument is a separate List item. + *lsp-cfg-filetype* + filetype One or more file types supported by the language + server. This can be a |String| or a |List|. To + specify multiple file types, use a List. + *lsp-cfg-initializationOptions* + initializationOptions + (Optional) for lsp servers (e.g. intelephense) some + additional initialization options may be required + or useful for initialization. Those can be provided in + this dictionary and if present will be transmitted to + the lsp server. + *lsp-cfg-workspaceConfig* + workspaceConfig (Optional) a json encodable value that will be sent to + the language server after initialization as the + "settings" in a "workspace/didChangeConfiguration" + notification. Refer to the language server + documentation for the values that will be accepted in + this notification. This configuration is also used to + respond to the "workspace/configuration" request + message from the language server. + *lsp-cfg-rootSearch* + rootSearch (Optional) a List of file and directory names used to + locate the root path or uri of the workspace. The + directory names in "rootSearch" must end in "/" or + "\". Each file and directory name in "rootSearch" is + searched upwards in all the parent directories. If + multiple directories are found, then the directory + closest to the directory of the current buffer is used + as the workspace root. + + If this parameter is not specified or the files are + not found, then the current working directory is used + as the workspace root for decendent files, for any + other files the parent directory of the file is used. + + *lsp-cfg-runIfSearch* + runIfSearch (Optional) a List of file and directory names used to + determinate if a server should run or not. The + directory names in "runIfSearch" must end in "/" or + "\". Each file and directory name in "runIfSearch" is + searched upwards in all the parent directories. + Exactly like |lsp-cfg-rootSearch|. + + If a file or directory is found then the server will + be started, otherwise it will not. + + If this parameter is not specified or is an empty + list, then the server will be started unless + |lsp-cfg-runUnlessSearch| prevents it. + + *lsp-cfg-runUnlessSearch* + runUnlessSearch (Optional) Opposite of |lsp-cfg-runIfSearch|. + +Additionally the following configurations can be made: + + *lsp-cfg-customNotificationHandlers* + customNotificationHandlers + (Optional) some lsp servers (e.g. + typescript-language-server) will send additional + notifications which you might want to silence or + handle. The provided notification handlers will be + called with a reference to the "lspserver" and the + "reply". > + + vim9script + g:LspAddServer([{ + filetype: ['javascript', 'typescript'], + path: '/usr/local/bin/typescript-language-server', + args: ['--stdio'], + customNotificationHandlers: { + '$/typescriptVersion': (lspserver, reply) => { + echom printf("TypeScript Version = %s", + reply.params.version) + } + } + }]) +< + *lsp-cfg-customRequestHandlers* + customRequestHandlers + (Optional) some lsp servers will send additional + request replies which you might want to silence or + handle. The provided request handlers will be called + with a reference to the "lspserver" and the "request". + + features *lsp-cfg-features* + (Optional) toggle which features should be enabled for + a given language server. See |lsp-multiple-servers| + and |lsp-features| for more information. + + forceOffsetEncoding *lsp-cfg-forceOffsetEncoding* + (Optional) a |String| value that forces the use of a + specific offset encoding in LSP messages. If this + option is not specified, then the UTF offset encoding + is negotiated with the server during initialization. + Supported values are 'utf-8' or 'utf-16' or 'utf-32'. + The Vim native offset encoding is 'utf-32'. For the + 'utf-8' and 'utf-16' encodings, the offsets need to be + encoded and decoded in every LSP message and will + incur some overhead. + + *lsp-cfg-omnicompl* + omnicompl (Optional) a boolean value that enables (true) + or disables (false) omni-completion for these file + types. By default this is set to "v:true". This value + is applicable only if auto completion is disabled + (|lsp-opt-autoComplete|). + + *lsp-cfg-processDiagHandler* + processDiagHandler + (Optional) A |Funcref| or |lambda| that takes a list + of language server diagnostics and returns a new list + of filtered, or otherwise changed diagnostics. Can be + used to remove unwanted diagnostics, prefix the + diagnostics text, etc. The following example will + remove all but errors and warnings: > + + vim9script + g:LspAddServer([{ + filetype: ['javascript', 'typescript'], + path: '/usr/local/bin/typescript-language-server', + args: ['--stdio'], + processDiagHandler: (diags: list<dict<any>>) => { + # Only include errors and warnings + return diags->filter((diag, ix) => { + return diag.severity <= 2 + }) + }, + }]) +< + And this example will prefix the diagnostic message + with the string "TypeScript: ": > + + vim9script + g:LspAddServer([{ + filetype: ['javascript', 'typescript'], + path: '/usr/local/bin/typescript-language-server', + args: ['--stdio'], + processDiagHandler: (diags: list<dict<any>>) => { + return diags->map((diag, ix) => { + diag.message = $'TypeScript: {diag.message}' + return diag + }) + }, + }]) +< + *lsp-cfg-syncInit* + syncInit (Optional) for language servers (e.g. rust analyzer, + gopls, etc.) that take time to initialize and reply to + a "initialize" request message this should be set to + "true". If this is set to true, then a synchronous + call is used to initialize the language server, + otherwise the server is initialized asynchronously. + By default this is set to "false". + + *lsp-cfg-debug* + debug (Optional) log the messages printed by this language + server in stdout and stderr to a file. Useful for + debugging a language server. By default the + messages are not logged. See |lsp-debug| for more + information. + + *lsp-cfg-traceLevel* + traceLevel (Optional) set the debug trace level for this language + server. Supported values are: "off", "debug" and + "verbose". By default this is seto "off". + +The language servers are added using the LspAddServer() function. This +function accepts a list of language servers with the above information. + +If you used [vim-plug](https://github.com/junegunn/vim-plug) to install the +LSP plugin, then you need to use the LspSetup User autocmd to initialize the +language server and to set the language server options. For example: > + + vim9script + + var lspOpts = {autoHighlightDiags: true} + autocmd User LspSetup LspOptionsSet(lspOpts) + + var lspServers = [ + { + name: 'clangd', + filetype: ['c', 'cpp'], + path: '/usr/local/bin/clangd', + args: ['--background-index'] + } + ] + autocmd User LspSetup LspAddServer(lspServers) +< + *lsp-options* *LspOptionsSet()* + *g:LspOptionsSet()* + +Some of the LSP plugin features can be enabled or disabled by using the +LspOptionsSet() function. This function accepts a dictionary argument with the +following optional items: + + *lsp-opt-aleSupport* +aleSupport |Boolean| option. If true, diagnostics will be sent to + Ale, instead of being displayed by this plugin. + This is useful to combine all LSP and linter + diagnostics. By default this is set to false. + + *lsp-opt-autoComplete* +autoComplete |Boolean| option. In insert mode, automatically + complete the current symbol. Otherwise use + omni-completion. By default this is set to true. + + *lsp-opt-autoHighlight* +autoHighlight |Boolean| option. In normal mode, automatically + highlight all the occurrences of the symbol under the + cursor. By default this is set to false. + + *lsp-opt-autoHighlightDiags* +autoHighlightDiags |Boolean| option. Automatically place signs on the + lines with a diagnostic message from the language + server. By default this is set to true. + + *lsp-opt-autoPopulateDiags* +autoPopulateDiags |Boolean| option. Automatically populate the location + list with diagnostics from the language server. + By default this is set to false. + + *lsp-opt-completionMatcher* +completionMatcher |String| option. Enable fuzzy or case insensitive + completion for language servers that replies with a + full list of completion items. Some language servers + does completion filtering in the server, while other + relies on the client to do the filtering. + + This option only works for language servers that + expect the client to filter the completion items. + + This option accepts one of the following values: + case - case sensitive matching (default). + fuzzy - fuzzy match completion items. + icase - ignore case when matching items. + + *lsp-opt-completionTextEdit* +completionTextEdit |Boolean| option. If true, apply the LSP server + supplied text edits after a completion. If a snippet + plugin is going to apply the text edits, then set + this to false to avoid applying the text edits twice. + By default this is set to true. + + *lsp-opt-completionKinds* +completionKinds |Dictionary| option. See |lsp-custom-kinds| for all + completion kind names. + + *lsp-opt-customCompletionKinds* +customCompletionKinds |Boolean| option. If you set this to true, you can + set custom completion kinds using the option + completionKinds. + + *lsp-opt-diagSignErrorText* +diagSignErrorText |String| option. Change diag sign text for errors + By default 'E>' + + *lsp-opt-diagSignHintText* +diagSignHintText |String| option. Change diag sign text for hints + By default 'H>', + + *lsp-opt-diagSignInfoText* +diagSignInfoText |String| option. Change diag sign text for info + By default 'I>', + + *lsp-opt-diagSignWarningText* +diagSignWarningText |String| option. Change diag sign text for warnings + By default 'W>', + + *lsp-opt-diagVirtualTextAlign* +diagVirtualTextAlign |String| option. Alignment of diagnostics messages + if |lsp-opt-showDiagWithVirtualText| is set to true. + Allowed values are 'above', 'below' or 'after' + By default this is set to 'above', + + *lsp-opt-diagVirtualTextWrap* +diagVirtualTextWrap |String| option. Wrapping of diagnostics messages + if |lsp-opt-showDiagWithVirtualText| is set to true. + Allowed values are 'default', 'wrap' or 'truncate' + By default this is set to 'default', + + *lsp-opt-echoSignature* +echoSignature |Boolean| option. In insert mode, echo the current + symbol signature instead of showing it in a popup. + By default this is set to false. + + *lsp-opt-hideDisabledCodeActions* +hideDisabledCodeActions |Boolean| option. Hide all the disabled code actions. + By default this is set to false. + + *lsp-opt-highlightDiagInline* +highlightDiagInline |Boolean| option. Highlight the diagnostics inline. + By default this is set to true. + + *lsp-opt-hoverInPreview* +hoverInPreview |Boolean| option. Show |:LspHover| in a preview window + instead of a popup. + By default this is set to false. + + *lsp-opt-ignoreMissingServer* +ignoreMissingServer |Boolean| option. Do not print a missing language + server executable. By default this is set to false. + + *lsp-opt-keepFocusInDiags* +keepFocusInDiags |Boolean| option. Focus on the location list window + after ":LspDiag show". + By default this is set to true. + + *lsp-opt-keepFocusInReferences* +keepFocusInReferences |Boolean| option. Focus on the location list window + after LspShowReferences. + By default this is set to true. + + *lsp-opt-noNewlineInCompletion* +noNewlineInCompletion |Boolean| option. Suppress adding a new line on + completion selection with <CR>. + By default this is set to false. + + *lsp-opt-omniComplete* +omniComplete |Boolean| option. Enables or disables omni-completion. + By default this is set to v:false. If "autoComplete" + is set to v:false, then omni-completion is enabled by + default. By setting "omniComplete" option to v:false, + omni-completion can also be disabled. + + *lsp-opt-outlineOnRight* +outlineOnRight |Boolean| option. Open the outline window on the + right side, by default this is false. + + *lsp-opt-outlineWinSize* +outlineWinSize |Number| option. The size of the symbol Outline + window. By default this is set to 20. + + *lsp-opt-semanticHighlight* +semanticHighlight |Boolean| option. Enables or disables semantic + highlighting. + By default this is set to false. + + *lsp-opt-showDiagInBalloon* +showDiagInBalloon |Boolean| option. When the mouse is over a range of + text referenced by a diagnostic, display the + diagnostic text in a balloon. By default this is set + to true. In a GUI Vim, this needs the |+balloon_eval| + feature. In a terminal Vim, this needs the + |+balloon_eval_term| feature. In a terminal Vim, + 'mouse' option should be set to enable mouse. + If this option is set to true, then the 'ballooneval' + and 'balloonevalterm' options are set. + + *lsp-opt-showDiagInPopup* +showDiagInPopup |Boolean| option. When using the ":LspDiag current" + command to display the diagnostic message for the + current line, use a popup window to display the + message instead of echoing in the status area. + By default this is set to true. + + *lsp-opt-showDiagOnStatusLine* +showDiagOnStatusLine |Boolean| option. Show a diagnostic message on a + status line. By default this is set to false. + + *lsp-opt-showDiagWithSign* +showDiagWithSign |Boolean| option. Place a sign on lines with + diagnostics. By default this is set to true. The + "autoHighlightDiags" option should be set to true. + + *lsp-opt-showDiagWithVirtualText* +showDiagWithVirtualText |Boolean| option. Show diagnostic message text from + the language server with virtual text. By default + this is set to false. The "autoHighlightDiags" option + should be set to true. + Needs Vim version 9.0.1157 or later. + + *lsp-opt-showInlayHints* +showInlayHints |Boolean| option. Show inlay hints from the language + server. By default this is set to false. The inlay + hint text is displayed as a virtual text. Needs Vim + version 9.0.0178 or later. + + *lsp-opt-showSignature* +showSignature |Boolean| option. In insert mode, automatically show + the current symbol signature in a popup. + By default this is set to true. + + *lsp-opt-snippetSupport* +snippetSupport |Boolean| option. Enable snippet completion support. + Need a snippet completion plugin like vim-vsnip. + By default this is set to false. + + *lsp-opt-ultisnipsSupport* +ultisnipsSupport |Boolean| option. Enable SirVer/ultisnips support. + Need a snippet completion plugin SirVer/ultisnips. + By default this is set to false. + + *lsp-opt-vssnipSupport* +vsnipSupport |Boolean| option. Enable hrsh7th/vim-vsnip support. + Need snippet completion plugins hrsh7th/vim-vsnip + and hrsh7th/vim-vsnip-integ. Make sure + ultisnipsSupport is set to false before enabling this. + By default this option is set to false. + + *lsp-opt-usePopupInCodeAction* +usePopupInCodeAction |Boolean| option. When using the |:LspCodeAction| + command to display the code action for the current + line, use a popup menu instead of echoing. + By default this is set to false. + + *lsp-opt-useQuickfixForLocations* +useQuickfixForLocations |Boolean| option. Show |:LspShowReferences| in a + quickfix list instead of a location list. + By default this is set to false. + + *lsp-opt-useBufferCompletion* +useBufferCompletion |Boolean| option. If enabled, the words from the + current buffer are added to the auto completion list. + By default this is set to false. + + *lsp-opt-bufferCompletionTimeout* +bufferCompletionTimeout |Number| option. Specifies how long (in milliseconds) + to wait while processing current buffer for + autocompletion words. If set too high Vim performance + may degrade as the current buffer contents are + processed every time the completion menu is displayed. + If set to 0 the entire buffer is processed without + regard to timeout. + By default this is set to 100 ms. + + *lsp-opt-filterCompletionDuplicates* +filterCompletionDuplicates |Boolean| option. If enabled, duplicate completion + items sent from the server will be filtered to only + include one instance of the duplicates. + +For example, to disable the automatic placement of signs for the LSP +diagnostic messages, you can add the following line to your .vimrc file: > + + call LspOptionsSet({'autoHighlightDiags': false}) +< + *LspOptionsGet()* +The LspOptionsGet() function returns a |Dict| of all the LSP plugin options, +To get a particular option value you can use the following: > + + echo LspOptionsGet()['autoHighlightDiags'] +< +============================================================================== +5. Commands *lsp-commands* + +A description of the various commands provided by this plugin is below. You +can map these commands to keys and make it easier to invoke them. + + *:LspCodeAction* +:LspCodeAction [query] Apply the code action supplied by the language server + to the diagnostic in the current line. This works only + if there is a diagnostic message for the current line. + You can use the ":LspDiag current" command to display + the diagnostic for the current line. + + When [query] is given the code action starting with + [query] will be applied. [query] can be a regexp + pattern, or a digit corresponding to the index of the + code actions in the created prompt. + + When [query] is not given you will be prompted to + select one of the actions supplied by the language + server. + + *:LspCodeLens* +:LspCodeLens Display a list of code lens commands available for the + current buffer and apply the selected code lens + command. + + *:LspDiag-current* +:LspDiag current Displays the diagnostic message (if any) for the + current line. If the option 'showDiagInPopup' is set + to true (default), then the message is displayed in + a popup window. Otherwise the message is displayed in + the status message area. + +:LspDiag! current Only display a diagnostic message if it's directly + under the cursor. Otherwise works exactly like + ":LspDiag current" + + To show the current diagnotic under the cursor while + moving around the following autocmd can be used: > + + augroup LspCustom + au! + au CursorMoved * silent! LspDiag! current + augroup END +< + *:LspDiag-first* +:LspDiag first Jumps to the location of the first diagnostic message + for the current file. + + *:LspDiag-here* +:LspDiag here Jumps to the location of the diagnostic message in + the current line (start from current column). + +:LspDiag highlight disable *:LspDiag-highlight-disable* + Disable highlighting lines with a diagnostic message + for the current Vim session. + To always disable the highlighting, set the + autoHighlightDiags option to false. + +:LspDiag highlight enable *:LspDiag-highlight-enable* + Enable highlighting lines with a diagnostic message + for the current Vim session. Note that highlighting + lines with a diagnostic message is enabled by default. + + *:LspDiag-last* +:LspDiag last Jumps to the location of the first diagnostic message + for the current file. + + *:LspDiag-next* +:[count]LspDiag next Go to the [count] diagnostic message after the current + cursor position. If [count] is omitted, then 1 is + used. If [count] exceeds the number of diagnostics + after the current position, then the last diagnostic + is selected. + + *:LspDiag-prev* +:[count]LspDiag prev Go to the [count] diagnostic message before the + current cursor position. If [count] is omitted, then + 1 is used. If [count] exceeds the number of + diagnostics before the current position, then first + last diagnostic is selected. + + *:LspDiag-show* +:LspDiag show Creates a new location list with the diagnostics + messages (if any) from the language server for the + current file and opens the location list window. You + can use the Vim location list commands to browse the + list. + + *:LspDocumentSymbol* +:LspDocumentSymbol Display the symbols in the current file in a popup + menu. When a symbol is selected in the popup menu by + pressing <Enter> or <Space>, jump to the location of + the symbol. + + The <Up>, <Down>, <Tab>, <S-Tab>, <C-N>, <C-P>, + <ScrollWheelUp>, ScrollWheelDown> keys can be used to + scroll popup menu one item at a time. <PageUp> and + <PageDown> can be used to scroll a page of popup + window, while <C-F> and <C-B> can be used to scroll a + page of underlying window. The <Esc> or <Ctrl-C> keys + can be used to cancel the popup menu. + + If one or more keyword characters are typed, then only + the symbols containing the keyword characters are + displayed in the popup menu. Fuzzy searching is used + to get the list of matching symbols. The <BS> key can + be used to erase the last typed character. The <C-U> + key can be used to erase all the characters. + + When scrolling through the symbols in the popup menu, + the corresponding range of lines is highlighted. + + *:LspFold* +:LspFold Create folds for the current buffer. + + *:LspFormat* +:LspFormat Format the current file using the language server. The + 'shiftwidth' and 'expandtab' values set for the + current buffer are used when format is applied. + +:{range}LspFormat Format the specified range of lines in the current + file using the language server. + + *:LspGotoDeclaration* +:[count]LspGotoDeclaration + Jumps to the declaration of the symbol under the + cursor. The behavior of this command is similar to the + |:LspGotoDefinition| command. + + *:LspGotoDefinition* +:[count]LspGotoDefinition + Jumps to the [count] definition of the symbol under + the cursor. If there are multiple matches and [count] + isn't specified, then a location list will be created + with the list of locations. + + If there is only one location, or [count] is provided + then the following will apply: + + If the file is already present in a window, then jumps + to that window. Otherwise, opens the file in a new + window. If the current buffer is modified and + 'hidden' is not set or if the current buffer is a + special buffer, then a new window is opened. If the + jump is successful, then the current cursor location + is pushed onto the tag stack. The |CTRL-T| command + can be used to go back up the tag stack. Also the + |``| mark is set to the position before the jump. + + This command supports |:command-modifiers|. You can + use the modifiers to specify whether a new window or + a new tab page is used and where the window is opened. + Example(s): > + + # Open a horizontally split window + :topleft LspGotoDefinition + # Open a vertically split window + :vert LspGotoDefinition + # Open a new tab page + :tab LspGotoDefinition +< + You may want to map a key to invoke this command: > + + nnoremap <buffer> gd <Cmd>LspGotoDefinition<CR> + nnoremap <buffer> <C-W>gd <Cmd>topleft LspGotoDefinition<CR> +< + Or if you want to support [count]gd > + + nnoremap <buffer> gd <Cmd>execute v:count .. 'LspGotoDefinition'<CR> + nnoremap <buffer> <C-W>gd <Cmd>execute 'topleft ' .. v:count .. 'LspGotoDefinition'<CR> +< + *:LspGotoImpl* +:[count]LspGotoImpl Jumps to the implementation of the symbol under the + cursor. The behavior of this command is similar to the + |:LspGotoDefinition| command. Note that not all the + language servers support this feature. + + You may want to map a key to invoke this command: > + + nnoremap <buffer> gi <Cmd>LspGotoImpl<CR> +< + *:LspGotoTypeDef* +:[count]LspGotoTypeDef Jumps to the type definition of the symbol under the + cursor. The behavior of this command is similar to the + |:LspGotoDefinition| command. Note that not all the + language servers support this feature. + + You may want to map a key to invoke this command: > + + nnoremap <buffer> gt <Cmd>LspGotoTypeDef<CR> +< + *:LspHighlight* +:LspHighlight Highlights all the matches for the symbol under + cursor. The text, read and write references to the + symbol are highlighted using Search, DiffChange and + DiffDelete highlight groups respectively. + + *:LspHighlightClear* +:LspHighlightClear Clears all the symbol matches highlighted by the + |:LspHighlight| command. + + *:LspHover* +:LspHover Show the documentation for the symbol under the cursor + in a popup window. The following keys can be used to + scroll the popup window: + + <CTRL-E> - Scroll window downwards by a line. + <CTRL-D> - Scroll window downwards by 'scroll' + lines. + <CTRL-F> - Scroll window downards by a page. + <PageDown> - ditto. + <CTRL-Y> - Scroll window upwards by a line. + <CTRL-U> - Scroll window upwards by 'scroll' + lines. + <CTRL-B> - Scroll window upwards by a page. + <PageUp> - ditto. + <CTRL-Home> - Goto the first line + <CTRL-End> - Goto the last line + + Pressing any other key will close the popup window. + + If you want to show the symbol documentation in the + |preview-window| instead of in a popup window set > + + LspOptionsSet({'hoverInPreview': true}) +< + You can use the |:pclose| command to close the preview + window. + + You can use the |K| key in normal mode to display the + documentation for the keyword under the cursor by + setting the 'keywordprg' Vim option: > + + :set keywordprg=:LspHover +< + *:LspIncomingCalls* +:LspIncomingCalls Display a hierarchy of symbols calling the symbol + under the cursor in a window. See + |lsp-call-hierarchy| for more information. Note that + not all the language servers support this feature. + + *:LspInlayHints* +:LspInlayHints Enable or disable inlay hints. Supports the "enable" + and "disable" arguments. When "enable" is specified, + enables the inlay hints for all the buffers with a + language server that supports inlay hints. When + "disable" is specified, disables the inlay hints. + + *:LspOutoingCalls* +:LspOutgoingCalls Display a hierarchy of symbols called by the symbol + under the cursor in a window. See + |lsp-call-hierarchy| for more information. Note that + not all the language servers support this feature. + + *:LspOutline* +:[count]LspOutline Opens a vertically split window with the list of + symbols defined in the current file. The current + symbol is highlighted. The symbols are grouped by + their type. You can select a symbol and press <Enter> + to jump to the position of the symbol. As you move the + cursor in a file, the current symbol is automatically + highlighted in the outline window. If you open a new + file, the outline window is automatically updated with + the symbols in the new file. Folds are created in the + outline window for the various group of symbols. + + You can use |lsp-opt-outlineOnRight| and + |lsp-opt-outlineWinSize| to customize the placement + and size of the window. + + This command also supports |:command-modifiers|. You + can use the modifiers specify the position of the + window. Note that the default is ":vert :topleft" or + ":vert :botright" depending on + |lsp-opt-outlineOnRight| + + This command also supports providing a [count] to + specify the size of the window. Note that this + overrides the values defined in + |lsp-opt-outlineWinSize|. + Example: > + + # Open the outline window just above the current + # window + :aboveleft LspOutline + + # Open the outline window just next to the current + # window, this is different from the default, when + # you have multiple splits already + :vert aboveleft LspOutline + + # Same as above, but with a width of 50 + :vert aboveleft 50LspOutline +< + *:LspPeekDeclaration* +:[count]LspPeekDeclaration + Displays the line where the symbol under the + cursor is declared in a popup window. The + behavior of this command is similar to the + |:LspPeekDefinition| command. + + *:LspPeekDefinition* +:[count]LspPeekDefinition + Displays the line where the symbol under the cursor is + defined in a popup window. The symbol is highlighted + in the popup window. Moving the cursor or pressing + <Esc> will close the popup window. + When more than one symbol is found all of them will be + shown. The corresponding file for the symbol is + displayed in another popup window. As the selection + in the symbol popup menu changes, the file in the + popup is updated. + When [count] is provided only the [count] symbol will + be shown. + + *:LspPeekImpl* +:[count]LspPeekImpl Displays the implementation of the symbol under the + cursor in a popup window. The behavior of this + command is similar to the |:LspPeekDefinition| + command. Note that not all the language servers + support this feature. + + *:LspPeekReferences* +:LspPeekReferences Displays the list of references to the symbol under + cursor in a popup menu. The corresponding file for + the reference is displayed in another popup window. + As the selection in the reference popup menu changes, + the file in the popup is updated. + + *:LspPeekTypeDef* +:[count]LspPeekTypeDef Displays the line where the type of the symbol under + the cursor is defined in a popup window. The + behavior of this command is similar to the + |:LspPeekDefinition| command. Note that not all the + language servers support this feature. + + *:LspRename* +:LspRename [newName] Rename the current symbol. + + When [newName] is not given, then you will be prompted + to enter the new name for the symbol. You can press + <Esc> or enter an empty string in the prompt to cancel + the operation. + + *:LspSelectionExpand* +:LspSelectionExpand Visually select the region of the symbol under the + cursor. In visual mode, expands the current symbol + visual region selection to include the next level. + + For example, if the cursor is on a "for" statement, + this command selects the "for" statement and the body + of the "for" statement. + + It is useful to create a visual map to use this + command. Example: > + + xnoremap <silent> <Leader>e <Cmd>LspSelectionExpand<CR> +< + With the above map, you can press "\e" in visual mode + successively to expand the current symbol visual + region. + + *:LspSelectionShrink* +:LspSelectionShrink Shrink the current symbol range visual selection. It + is useful to create a visual map to use this command. + Example: > + + xnoremap <silent> <Leader>s <Cmd>LspSelectionShrink<CR> +< + With the above map, you can press "\s" in visual mode + successively to shrink the current symbol visual + region. + + *:LspServer* +:LspServer { debug | restart | show | trace } + Command to display and control the language server for + the current buffer. Each argument has additional + sub-commands which are described below. + + debug { on | off | messages | errors } + Command to enable or disable the language server + debug messages and to display the debug messages + and error messages received from the language + server. The following sub-commands are supported: + errors Open the log file containing the + language server error messages. + messages + Open the log file containing the + language server debug messages. + off Disable the logging of the language + server messages. + on Enable the logging of the messages + emitted by the language server in the + standard output and standard error. + By default, the language server messages are not + logged. On a Unix-like system, when enabled, + these messages are logged to the + /tmp/lsp-<server-name>.log and + /tmp/lsp-<server-name>.err file respectively. On + MS-Windows, the %TEMP%/lsp-<server-name>.log and + %TEMP%/lsp-<server-name>.err% files are used. See + |lsp-debug| for more information. + + restart + Restart (stop and then start) the language server + for the current buffer. All the loaded buffers + with the same filetype as the current buffer are + added back to the server. + + show {capabilities | initializeRequest | messages + | status} + The following sub-commands are supported: + capabilities + Display the list of language server + capabilities for the current buffer. + The server capabilities are described + in the LSP protocol specification + under the "ServerCapabilities" + interface. + initializeRequest + Display the contents of the language + server initialization request message + (initialize). + messages + Display the log messages received from + the language server. This includes + the messages received using the + "window/logMessage" and "$/logTrace" + LSP notifications. + status + Display the language server status for + the current buffer. The output shows + the path to the language server + executable and the server status. + + trace { off | messages | verbose } + Set the language server debug trace value using + the "$/setTrace" command. + + *:LspShowAllServers* +:LspShowAllServers Displays the list of registered language servers and + their status. The language servers are registered + using the LspAddServer() function. The output is + displayed in a scratch buffer. The output shows the + Vim file type, the corresponding language server + status and the path to the language server executable. + The language server information for each buffer is + also shown. + + *:LspShowReferences* +:LspShowReferences Creates a new location list with the list of locations + where the symbol under the cursor is referenced and + opens the location window. If you want to show the + references in a quickfix list instead of in a location + list set > + + LspOptionsSet({'useQuickfixForLocations': true}) +< + *:LspShowSignature* +:LspShowSignature Displays the signature of the symbol (e.g. a function + or method) before the cursor in a popup. + + The popup is also automatically displayed in insert + mode after entering a symbol name followed by a + separator (e.g. a opening parenthesis). To disable + this, you can set the showSignature option to false in + your .vimrc file: > + + LspOptionsSet({'showSignature': false}) +< + Default is true. + + You can get the function signature echoed in cmdline + rather than displayed in popup if you use > + + LspOptionsSet({'echoSignature': true}) +< + Default is false. + + *:LspSubTypeHierarchy* +:LspSubTypeHierarchy Show the sub type hierarchy for the symbol under the + cursor in a popup window. The file containing the + type is shown in another popup window. You can jump + to the location where a type is defined by browsing + the popup menu and selecting an entry. + + *:LspSuperTypeHierarchy* +:LspSuperTypeHierarchy Show the super type hierarchy for the symbol under the + cursor in a popup window. The file containing the + type is shown in another popup window. As the current + entry in the type hierarchy popup menu changes, the + file popup window is updated to show the location + where the type is defined. You can jump to the + location where a type is defined by selecting the + entry in the popup menu. + + Note that the type hierarchy support is based on the + protocol supported by clangd. This is different from + the one specified in the 3.17 of the LSP standard. + + *:LspSwitchSourceHeader* +:LspSwitchSourceHeader Switch between source and header files. This is a + Clangd specific extension and only works with C/C++ + source files. + + *:LspSymbolSearch* +:LspSymbolSearch <sym> Perform a workspace wide search for the symbol <sym>. + If <sym> is not supplied, then you will be prompted to + enter the symbol name (the keyword under the cursor is + used as the default). If there is only one matching + symbol, then the cursor will be positioned at the + symbol location. Otherwise a popup window is opened + with the list of matching symbols. You can enter a + few characters to narrow down the list of matches. The + displayed symbol name can be erased by pressing + <Backspace> or <C-U> and a new symbol search pattern + can be entered. You can close the popup menu by + pressing the escape key or by pressing CTRL-C. + + In the popup menu, the following keys can be used: + + CTRL-F - Scroll one page forward + <PageDown> - idem + CTRL-B - Scroll one page backward + <PageUp> - idem + CTRL-Home - Jump to the first entry + CTRL-End - Jump to the last entry + <Up> - Go up one entry + <C-P> - idem + <Down> - Go down one entry + <C-N> - idem + <Enter> - Open the selected file + <Esc> - Close the popup menu + <CTRL-C> - idem + <BS> - Erase one character from the + filter text + <C-H> - idem + <C-U> - Erase the filter text + + Any other alphanumeric key will be used to narrow down + the list of names displayed in the popup menu. When + you type a filter string, then only the symbols fuzzy + matching the string are displayed in the popup menu. + You can enter a new search pattern to do a workspace + wide symbol search. + + This command accepts |:command-modifiers| which can be + used to jump to a symbol in a horizontally or + vertically split window or a new tab page: > + + :topleft LspSymbolSearch foo + :vert LspSymbolSearch bar + :tab LspSymbolSearch baz +< + *:LspWorkspaceAddFolder* +:LspWorkspaceAddFolder {folder} + Add a folder to the workspace + +:LspWorkspaceListFolders *:LspWorkspaceListFolders* + Show the list of folders in the workspace. + + *:LspWorkspaceRemoveFolder* +:LspWorkspaceRemoveFolder {folder} + Remove a folder from the workspace + +============================================================================== +6. Insert Mode Completion *lsp-ins-mode-completion* + +By default, when you are in insert mode, the LSP plugin will automatically +display suggestions for the symbol under the cursor in an insert-completion +popup menu. The keys specified in |popupmenu-keys| can be used to interact +with this menu. + +To disable this auto-completion feature for all files, you can set the +"autoComplete" option to false in your .vimrc file using the |LspOptionsSet()| +function: > + + call LspOptionsSet({'autoComplete': false}) +< +By setting the "autoComplete" option to |v:false|, the LSP plugin will no +longer automatically trigger completion suggestions in insert mode. Instead, +it will use omni-completion (|compl-omni|) and set the 'omnifunc' option for +buffers that have a registered language server. To manually trigger symbol +completion in insert mode, you can press CTRL-X CTRL-O. This key combination +will invoke completion using the suggestions provided by the language server. + +To enable omni-completion for all the buffers, set the "omniComplete" option +to v:true. To explicitly disable omni-completion for all the buffers, set the +"omniComplete" option to v:false (default). + +In addition to the general auto-completion behavior discussed above, you +have the option to enable or disable omni-completion for a specific language +server when registering it for a particular filetype. + +To do this, you can set the 'omnicompl' item to |v:false| in the configuration +when registering the language server for the desired filetype. If the +'omnicompl' item is not specified, omni-completion is enabled by default. + +Here's an example of how to disable omni-completion for Python: > + + vim9script + var lspServers = [ + { + filetype: 'python', + omnicompl: false, + path: '/usr/local/bin/pyls', + args: ['--check-parent-process', '-v'] + } + ] +< +In this example, the language server for Python is registered using the +|LspAddServer()| function, and the 'omnicompl' item is explicitly set to +|v:false|. As a result, omni-completion will be disabled for Python files +associated with this language server. + +Please note that if 'omnicompl' is not included in the configuration +when registering the language server, omni-completion will be enabled by +default. + +In insert-mode completion, the plugin sends a completion request message to +the language server and obtains a list of potential completion matches based +on the current cursor position. To achieve this, the plugin retrieves the +keyword immediately preceding the cursor (refer to 'iskeyword' setting) and +then filters the list of completion items received from the language server +based on this keyword. The resulting filtered list is displayed as the +completion menu. + +It's worth noting that different language servers handle completion filtering +in distinct ways. Some servers perform the filtering directly on the +server-side, while others delegate this task to the client-side, which is the +plugin in this context. + +By default, the plugin uses a case-sensitive comparison method to filter the +returned completion items. However, you have the flexibility to customize this +behavior by modifying the "completionMatcher" option. This option allows you +to switch between case-insensitive or fuzzy comparison methods as per your +preference and requirements for completion matching. + +In addition to automatic completion and omni completion, there is a +possibility to utilize external completion engines with the LSP client. This +can be achieved by repurposing the |g:LspOmniFunc| function. The external +completion engine adapter needs to invoke this function twice, following the +approach outlined in the |complete-functions| documentation. + +The process works as follows: + +1. First Invocation: The external completion engine adapter calls + |g:LspOmniFunc| to initiate a request to the LSP server for completion + candidates. +2. After the first invocation, a request is sent to the LSP server to find + completion candidates. +3. Second Invocation: The external completion engine adapter calls + |g:LspOmniFunc| again to retrieve the matches returned by the LSP server. +4. If the LSP server is not ready to reply immediately, |g:LspOmniFunc| waits + for up to 2 seconds. +5. However, this wait could block the caller from performing other tasks, + which might be a concern for asynchronous completion engines. +6. To address this issue, the adapter can use the |g:LspOmniCompletePending| + function, which allows for a non-blocking check. It returns true + immediately if the language server is not ready to respond yet. +7. To proceed with the second invocation of g:LspOmniFunc, it is crucial to + ensure that |g:LspOmniCompletePending| returns false, indicating that the + language server is now ready to provide the completion matches. + +============================================================================== +7. Diagnostics *lsp-diagnostics* + +The LSP plugin offers a feature to highlight syntax errors, warnings, and +static analysis warnings in a source file by placing signs in the sign column. +These signs serve as visual indicators of the diagnostics reported by the +language server. + +To interact with these diagnostics, you can use various commands provided by +the LSP plugin: + +1. ":LspDiag show": This command displays all the diagnostic messages for the + current file in a location-list window. The location-list window allows + you to view a list of all the diagnostic messages, along with their + corresponding line numbers and descriptions. +2. ":LspDiag first": Use this command to jump directly to the line containing + the first diagnostic message. It helps you quickly navigate to the + location of the initial issue detected by the language server. +3. ":LspDiag next": With this command, you can navigate to the next nearest + line with a diagnostic message. It helps you step through the list of + diagnostics one by one. +4. ":LspDiag prev": Conversely, this command allows you to jump to the + previous nearest line with a diagnostic message. It is useful for + reviewing diagnostics in reverse order. +5. ":LspDiag here": If you want to focus solely on the diagnostic message for + the current line, you can use this command to jump directly to it. +6. ":LspDiag current": This command displays the entire diagnostic message + from the language server for the current line. It provides detailed + information about the specific issue and its description. + +By using these commands, you can efficiently navigate and inspect the +diagnostics reported by the language server, making it easier to identify and +address syntax errors, warnings, or static analysis issues in your code. + +By default, the LSP plugin marks lines with diagnostic messages by placing a +sign on them and highlighting the range of text associated with the +diagnostic. However, you have the option to customize this behavior by +adjusting certain configuration settings: + +1. Disabling Automatic Sign Placement: If you wish to prevent the automatic + placement of signs on lines with diagnostic messages, you can achieve this + by setting the "showDiagWithSign" option to |v:false|. By default, this + option is set to |v:true|, meaning that signs are automatically placed on + lines with diagnostics. +2. Disabling Diagnostic Text Highlighting: If you prefer not to have the + diagnostic text highlighted, you can do so by setting the + "highlightDiagInline" option to |v:false|. By default, this option is set + to |v:true|, resulting in the highlighting of the text range associated + with each diagnostic. +3. Highlight Group for Line with Diagnostics: The LSP plugin uses the + "LspDiagLine" highlight group to highlight lines containing diagnostics. + By default, this highlight group is not set, allowing you to define your + own highlighting style for lines with diagnostics if desired. + +In addition to the default display of the diagnostic messages with signs and +text highlighting, the LSP plugin offers the option to present the diagnostic +message as virtual text, located near the relevant location of the +diagnostics. To enable this feature, you can set the +"showDiagWithVirtualText" option to |v:true|. However, please note that this +functionality requires Vim version 9.0.1157 or later. By default, this option +is set to |v:false|, meaning that virtual text display is not activated. + +The position of the virtual text can be controlled using the +"diagVirtualTextAlign" option, which determines its alignment relative to the +affected line. By default, this option is set to 'above', which places the +virtual text above the line with the diagnostic message. The other supported +values for "diagVirtualTextAlign" are 'below', which positions the virtual +text below the affected line, and 'after', which displays the virtual text +immediately after the text on the affected line. + +The wrapping of the virtual text can be controlled using the +"diagVirtualTextWrap" option. By default, this option is set to 'default', +which will 'truncate' virtual text placed 'above' or 'below' the affected +line, and 'wrap' text placed 'after' the affected line. Setting the value to +'wrap' or 'truncate' will force the specified behavior for the current +value of "diagVirtualTextAlign". If 'truncate' is used while +"diagVirtualTextAlign" is set to 'after', and a diagnostic message has already +been truncated for the affected line, then further diagnostics will be placed +below the affected line. + +The LSP plugin offers convenient ways to highlight diagnostic messages, making +it easier to spot errors, warnings, hints, or informational notices within +your code. By default, the plugin automatically highlights the range of text +associated with each diagnostic message when the "highlightDiagInline" option +is set to |v:true.| + +The highlighting is done using different highlight groups based on the type of +diagnostic message: + + "LspDiagInlineError" for error messages. + "LspDiagInlineHint" for hints. + "LspDiagInlineInfo" for informational messages. + "LspDiagInlineWarning" for warning messages. + +If you wish to temporarily disable the automatic diagnostic highlighting for +the current Vim session, you can achieve this using the ":LspDiag highlight +disable" command. When you want to re-enable the highlighting, you can use +the ":LspDiag highlight enable" command. + +To permanently disable the automatic highlighting of diagnostics, you can set +the "autoHighlightDiags" option to |v:false| in your .vimrc file. This +configuration can be achieved using the |LspOptionsSet()| function: > + + call LspOptionsSet({'autoHighlightDiags': v:false}) +< +By default, the "autoHighlightDiags" option is set to |v:true|, ensuring that +diagnostic messages are automatically highlighted during your coding sessions. + +The lsp#lsp#ErrorCount() function returns the count of diagnostic messages in +the current buffer, categorized by their types. When called, this function +returns a Dictionary containing four keys: "Info," "Hint," "Warn," and +"Error." Each key corresponds to a specific diagnostic type, and its +associated value is the number of diagnostic messages of that particular type +found in the buffer. With the information gathered using this function, you +can easily display the number of diagnostics in the current buffer in your +'statusline'. + +For some diagnostic errors/warnings, the language server may provide an +automatic fix. To apply this fix, you can use the |:LspCodeAction| command. +This command applies the action provided by the language server (if any) for +the current line. + +The ":LspDiag show" command creates a new location list with the current list +of diagnostics for the current buffer. To automatically refresh the location +list with the latest diagnostics received from the language server, you can +set the "autoPopulateDiags" option to |v:true|. By default this option is set +to |v:false|. When new diagnostics are received for a buffer, if a location +list with the diagnostics is already present, then it is refreshed with the +new diagnostics. + +In GUI Vim or terminal Vim with the 'balloonevalterm' option enabled, a +helpful feature allows you to view diagnostic messages in a popup balloon when +you hover the mouse over the affected range of text. This provides a +convenient way to quickly access diagnostic information without the need to +execute additional commands or navigate through the location list. + +By default, the LSP plugin is configured to display diagnostic messages in the +popup balloon, enhancing the user experience and providing visual feedback as +you interact with your code. This default behavior is governed by the +"showDiagInBalloon" option, which is set to |v:true| by default. + +However, if you prefer not to see the diagnostic messages in the popup +balloons and prefer to rely solely on other methods, you have the flexibility +to customize this behavior. By setting the "showDiagInBalloon" option to +|v:false|, you can disable the display of diagnostic messages in the popup +balloons. This can be useful if you find the balloons intrusive or if you +prefer to view diagnostics through other means, such as the location list or +the status line. + +To display the diagnostic message for the current line in the status area, you +can set the "showDiagOnStatusLine" option to |v:true|. By default, this +option is set to |v:false|. + +By default, the ":LspDiag current" command displays the diagnostic message for +the current line in a popup window. To display the message in the status +message area instead, you can set the 'showDiagInPopup' option to |v:false|. +By default this is set to |v:true|. + +The lsp#diag#GetDiagsForBuf() function can be used to get all the LSP +diagnostics in a buffer. This function optionally accepts a buffer number. +If the buffer number argument is not specified, then the current buffer is +used. This function returns a |List| of diagnostics sorted by their line and +column number. Each diagnostic is a |Dict| returned by the language server. + +============================================================================== +8. Tag Function *lsp-tagfunc* + +The |:LspGotoDefinition| command can be used jump to the location where a +symbol is defined. To jump to the symbol definition using the Vim +|tag-commands|, you can set the 'tagfunc' option to the 'lsp#lsp#TagFunc' +function: > + + setlocal tagfunc=lsp#lsp#TagFunc +< +After setting the above option, you can use |Ctrl-]| and other tag related +commands to jump to the symbol definition. + +Note that most of the language servers return only one symbol location even if +the symbol is defined in multiple places in the code. + +============================================================================== +9. Code Formatting *lsp-format* + +The |:LspFormat| command can be used to format either the entire file or a +selected range of lines using the language server. The 'shiftwidth' and +'expandtab' values set for the current buffer are used when format is applied. + +To format code using the 'gq' command, you can set the 'formatexpr' option: > + + setlocal formatexpr=lsp#lsp#FormatExpr() +< +============================================================================== +10. Call Hierarchy *lsp-call-hierarchy* + +The |:LspIncomingCalls| and the |:LspOutoingCalls| commands can be used to +display the call hierarchy of a symbol. For example, the functions calling a +function or the functions called by a function. These two commands open a +window containing the call hierarchy tree. You can use the Vim motion +commands to browse the call hierarchy. + +In the call hierarchy tree window, the following keys are supported: + +<Enter> Jump to the location of the symbol under the + cursor. +- Expand and show the symbols calling or called + by the symbol under the cursor. ++ Close the call hierarchy for the symbol under + the cursor. + +You can display either the incoming call hierarchy or the outgoing call +hierarchy in this window. You cannot display both at the same time. + +In the call hierarchy tree window, the following commands are supported: + + *:LspCallHierarchyRefresh* +:LspCallHierarchyRefresh Query the language server again for the top + level symbol and refresh the call hierarchy + tree. + *:LspCallHierarchyIncoming* +:LspCallHierarchyIncoming Display the incoming call hierarchy for the + top level symbol. If the window is currently + displaying the outgoing calls, then it is + refreshed to display the incoming calls. + *:LspCallHierarchyOutgoing* +:LspCallHierarchyOutgoing Display the outgoing call hierarchy for the + top level symbol. If the window is currently + displaying the incoming calls, then it is + refreshed to display the outgoing calls. + +============================================================================== +11. Autocommands *lsp-autocmds* + + *LspSetup* +LspSetup A |User| autocommand fired when the LSP plugin + is loaded. Can be used to add language + servers using the |LspAddServer()| function + and to set plugin options using the + |LspOptionsSet()| function. + + *LspAttached* +LspAttached A |User| autocommand fired when the LSP client + attaches to a buffer. Can be used to configure + buffer-local mappings or options. + + *LspDiagsUpdated* +LspDiagsUpdated A |User| autocommand invoked when new + diagnostics are received from the language + server. This is invoked after the LSP client + has processed the diagnostics. The function + lsp#diag#GetDiagsForBuf() can be used to get + all the diagnostics for a buffer. + +============================================================================== +12. Highlight Groups *lsp-highlight-groups* + +The following highlight groups are used by the LSP plugin. You can define +these highlight groups in your .vimrc file before sourcing this plugin to +override them. + +*LspDiagInlineError* Used to highlight inline error diagnostics. + By default, linked to the "SpellBad" highlight + group. +*LspDiagInlineHint* Used to highlight inline hint diagnostics. + By default, linked to the "SpellLocal" + highlight group. +*LspDiagInlineInfo* Used to highlight inline info diagnostics. + By default, linked to the "SpellRare" + highlight group. +*LspDiagInlineWarning* Used to highlight inline warning diagnostics. + By default, linked to the "SpellCap" highlight + group. +*LspDiagLine* Used to highlight a line with one or more + diagnostics. By default linked to "NONE" + (cleared). You can link this to a highlight + group to highlight the line. +*LspDiagSignErrorText* Used to highlight the sign text for error + diags. By default linked to 'ErrorMsg'. +*LspDiagSignHintText* Used to highlight the sign text for hint + diags. By default linked to 'Question'. +*LspDiagSignInfoText* Used to highlight the sign text for info + diags. By default linked to 'Pmenu'. +*LspDiagSignWarningText* Used to highlight the sign text for warning + diags. By default linked to 'Search'. +*LspDiagVirtualText* Used to highlight diagnostic virtual text. + By default, linked to the "LineNr" highlight + group. +*LspDiagVirtualTextError* Used to highlight virtual text for error diags. + By default, linked to the "SpellBad" highlight + group. +*LspDiagVirtualTextHint* Used to highlight virtual text for hint + diags. By default, linked to the "SpellLocal" + highlight group. +*LspDiagVirtualTextInfo* Used to highlight virtual text for info + diags. By default, linked to the "SpellRare" + highlight group. +*LspDiagVirtualTextWarning* Used to highlight virtual text for warning + diags. By default, linked to the "SpellCap" + highlight group. +*LspInlayHintsParam* Used to highlight inlay hints of kind + "parameter". By default, linked to the + "Label" highlight group. +*LspInlayHintsType* Used to highlight inlay hints of kind "type". + By default, linked to the "Conceal" highlight + group. +*LspSigActiveParameter* Used to highlight the active signature + parameter. By default, linked to the "LineNr" + highlight group. +*LspSymbolName* Used to highlight the symbol name when using + the |:LspDocumentSymbol| command. By default, + linked to the "Search" highlight group. +*LspSymbolRange* Used to highlight the range of lines + containing a symbol when using the + |:LspDocumentSymbol| command. By default, + linked to the "Visual" highlight group. + +For example, to override the highlight used for diagnostics virtual text, you +can use the following: > + + highlight LspDiagVirtualText ctermfg=Cyan guifg=Blue +< +or > + + highlight link LspDiagLine DiffAdd + highlight link LspDiagVirtualText WarningMsg +< +============================================================================== +13. Debugging *lsp-debug* + +To debug this plugin, you can log the language server protocol messages sent +and received by the plugin from the language server. The following command +enables the logging of the messages from the language server for the current +buffer: > + + :LspServer debug on +< +This command also clears the log files. The following command disables the +logging of the messages from the language server for the current buffer: > + + :LspServer debug off +< +By default, the messages are not logged. Another method to enable the debug +is to set the "debug" field to true when adding a language server +using |LspAddServer()|. + +The messages printed by the language server in the stdout are logged to the +lsp-<server-name>.log file and the messages printed in the stderr are logged +to the lsp-<server-name>.err file. On a Unix-like system, these files are +created in the /tmp directory. On MS-Windows, these files are created in the +%TEMP% directory. + +The following command opens the file containing the messages printed by the +language server in the stdout: > + + :LspServer debug messages +< +The following command opens the file containing the messages printed by the +language server in the stderr: > + + :LspServer debug errors +< +To debug language server initialization problems, after enabling the above +server debug, you can restart the server for the file type in the current +buffer using the following command: > + + :LspServer restart +< +The language servers typically support command line options to enable debug +messages and to increase the verbosity of the messages. You can refer to the +language server documentation for information about this. You can include +these options when registering the language server with this plugin. + +If a language server supports the "$/logTrace" LSP notification, then you can +use the :LspServerTrace command to set the server trace value: > + + :LspServer trace { off | messages | verbose } +< +============================================================================== +14. Custom Command Handlers *lsp-custom-commands* + +When applying a code action, the language server may issue a non-standard +command. For example, the Java language server uses non-standard commands +(e.g. java.apply.workspaceEdit). To handle these commands, you can register a +callback function for each command using the LspRegisterCmdHandler() function. +For example: > + + vim9script + import autoload "lsp/textedit.vim" + + def WorkspaceEdit(cmd: dict<any>) + for editAct in cmd.arguments + textedit.ApplyWorkspaceEdit(editAct) + endfor + enddef + g:LspRegisterCmdHandler('java.apply.workspaceEdit', WorkspaceEdit) +< +Place the above code in a file named lsp_java/plugin/lsp_java.vim and load +this plugin. + +The callback function should accept a Dict argument. The Dict argument +contains the LSP Command interface fields. Refer to the LSP specification for +more information about the "Command" interface. + +============================================================================== +15. Custom LSP Completion Kinds *lsp-custom-kinds* + +When a completion popup is triggered, the LSP client will use a default kind +list to show in the completion "kind" section, to customize it, you need to +use the option |lsp-opt-customCompletionKinds| and set all custom kinds in the +option |lsp-opt-completionKinds| . There is a table with all default LSP +kinds: + + Kind Name | Value +------------------------|-------------------- + Text | t + Method | m + Function | f + Constructor | C + Field | F + Variable | v + Class | c + Interface | i + Module | M + Property | p + Unit | u + Value | V + Enum | e + Keyword | k + Snippet | S + Color | C + File | f + Reference | r + Folder | F + EnumMember | E + Constant | d + Struct | s + Event | E + Operator | o + TypeParameter | T + Buffer | B + +For example, if you want to change the "Method" kind to the kind "method()": > + + vim9script + + g:LspOptionsSet({ + customCompletionKinds: true, + completionKinds: { + "Method": "method()" + } + }) +< +In the completion popup, will show something like this: > + + var file = new File() + + file.cre + | create method() | + | createIfNotExists method() | + | ... | +< +============================================================================== +16. Multiple Language Servers for a buffer *lsp-multiple-servers* + +It's possible to run multiple language servers for a given buffer. + +By default the language server defined first will be used for as much as it +supports, then the next and so on. With the exception that diagnostics from +all running language servers will be combined. + +This means that you can define a language server that only supports a subset +of features at first and then define the general purpose language server after +it: +> + vim9script + + g:LspAddServer([ + # This language server reports that it only supports + # textDocument/documentFormatting, so it will be used + # for :LspFormat but nothing else. + { + filetype: ['html'], + path: 'html-pretty-lsp', + args: ['--stdio'] + }, + # This language server also supports + # textDocument/documentFormatting, but since it's been + # defined later, the one above will be used instead. + # However this server also supports + # textDocument/definition, textDocument/declaration, + # etc, so it will be used for :LspGotoDefinition, + # :LspGotoDeclaration, etc + { + filetype: ['html'], + path: 'html-language-server', + args: ['--stdio'] + } + ]) +< +As shown in the example above the order of when the language servers are being +defined is taken into account for a given method. However sometimes the +language server that you want to use for formatting also reports that it +supports other features. In such a case you can do one of two things: + +1. change the order of language servers, and specify that a given language +server should be used for a given method. + +2. set the unwanted features to |false| in the features |Dictionary| > + + features: { 'codeAction': false } +< +For example, if you want to use the efm-langserver for formatting, but the +typescript-language-server for everything else: > + + vim9script + + g:LspAddServer([ + # this language server will be used by default, as it's defined + # as the first LSP for 'javascript' and 'typescript' + { + filetype: ['javascript', 'typescript'], + path: '/usr/local/bin/typescript-language-server', + args: ['--stdio'] + }, + # this language server will be used for documentFormatting + { + filetype: ['javascript', 'typescript'], + path: '/usr/local/bin/efm-langserver', + args: [], + features: { + documentFormatting: true + } + } + ]) +< +Another way is to disable the unwanted features: for example if you don't want +diagnostics from the typescript-language-server, but want to use it for +everything else: > + + vim9script + + g:LspAddServer([ + { + filetype: ['javascript', 'typescript'], + path: '/usr/local/bin/typescript-language-server', + args: ['--stdio'], + features: { + diagnostics: false + } + }, + ]) +< +============================================================================== +17. Language Server Features *lsp-features* + +When using multiple language servers for a given file type, by providing the +configuration |lsp-cfg-features| it is possible to specify which language +server should be used for a given method/functionality. The following feature +flags are supported: See |lsp-multiple-servers| for examples. + + *lsp-features-callHierarchy* +callHierarchy Used by the|:LspIncomingCalls| and the + |:LspOutgoingCalls| commands. + *lsp-features-codeAction* +codeAction Used by the |:LspCodeAction| command. + *lsp-features-codeLens* +codeLens Used by the |:LspCodeLens| command. + *lsp-features-completion* +completion Used by 24/7 Completion and 'omnifunc' + *lsp-features-declaration* +declaration Used by the |:LspGotoDeclaration|, and + the |:LspPeekDeclaration| commands. + *lsp-features-definition* +definition Used by the|:LspGotoDefinition|, and + the |:LspPeekDefinition| commands. + *lsp-features-diagnostics* +diagnostics Used to disable diagnostics for a single + language server, by default diagnostics are + combined from all running servers, by setting + this to |false| you can ignore diagnostics + from a specific server. + *lsp-features-documentFormatting* +documentFormatting Used by the |:LspFormat| command, and + 'formatexpr' + *lsp-features-documentHighlight* +documentHighlight Used by the |:LspHighlight| and the + |:LspHighlightClear| commands. + *lsp-features-documentSymbol* +documentSymbol Used by the |:LspDocumentSymbol| and the + |:LspOutline| commands. + *lsp-features-foldingRange* +foldingRange Used by the|:LspFold| command. + *lsp-features-hover* +hover Used by the |:LspHover| command. + *lsp-features-implementation* +implementation Used by the |:LspGotoImpl| and the + |:LspPeekImpl| commands. + *lsp-features-inlayHint* +inlayHint Used to show the inlay hints for + function/method arguments. + *lsp-features-references* +references Used by the |:LspShowReferences| command. + *lsp-features-rename* +rename Used by the |:LspRename| command. + *lsp-features-selectionRange* +selectionRange Used by the |:LspSelectionExpand| and the + |:LspSelectionShrink| commands. + *lsp-features-signatureHelp* +signatureHelp Used by the |:LspShowSignature| command. + *lsp-features-typeDefinition* +typeDefinition Used by the |:LspGotoTypeDef| and the + |:LspPeekTypeDef| commands. +typeHierarchy Used by the |:LspSubTypeHierarchy| and the + |:LspSuperTypeHiearchy| commands. +workspaceSymbol Used by the |:LspSymbolSearch| command. + +============================================================================== + *lsp-license* +License: MIT License +Copyright (c) 2020-2023 Yegappan Lakshmanan + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to +deal in the Software without restriction, including without limitation the +rights to use, copy, modify, merge, publish, distribute, sublicense, and/or +sell copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS +IN THE SOFTWARE. + +============================================================================== + +vim:tw=78:ts=8:noet:ft=help:norl: |