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460 lines
12 KiB
Go
460 lines
12 KiB
Go
package lsp
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import (
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"fmt"
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"io/ioutil"
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"path/filepath"
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"strings"
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"github.com/mickael-menu/zk/internal/core"
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"github.com/mickael-menu/zk/internal/util"
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"github.com/mickael-menu/zk/internal/util/errors"
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"github.com/mickael-menu/zk/internal/util/opt"
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strutil "github.com/mickael-menu/zk/internal/util/strings"
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"github.com/tliron/glsp"
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protocol "github.com/tliron/glsp/protocol_3_16"
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glspserv "github.com/tliron/glsp/server"
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"github.com/tliron/kutil/logging"
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_ "github.com/tliron/kutil/logging/simple"
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)
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// Server holds the state of the Language Server.
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type Server struct {
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server *glspserv.Server
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notebooks *core.NotebookStore
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documents map[protocol.DocumentUri]*document
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fs core.FileStorage
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logger util.Logger
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}
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// ServerOpts holds the options to create a new Server.
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type ServerOpts struct {
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Name string
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Version string
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LogFile opt.String
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Logger *util.ProxyLogger
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Notebooks *core.NotebookStore
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FS core.FileStorage
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}
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// NewServer creates a new Server instance.
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func NewServer(opts ServerOpts) *Server {
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fs := opts.FS
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debug := !opts.LogFile.IsNull()
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if debug {
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logging.Configure(10, opts.LogFile.Value)
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}
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workspace := newWorkspace()
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handler := protocol.Handler{}
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server := &Server{
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server: glspserv.NewServer(&handler, opts.Name, debug),
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notebooks: opts.Notebooks,
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documents: map[string]*document{},
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fs: fs,
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}
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// Redirect zk's logger to GLSP's to avoid breaking the JSON-RPC protocol
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// with unwanted output.
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if opts.Logger != nil {
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opts.Logger.Logger = newGlspLogger(server.server.Log)
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server.logger = opts.Logger
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}
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var clientCapabilities protocol.ClientCapabilities
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handler.Initialize = func(context *glsp.Context, params *protocol.InitializeParams) (interface{}, error) {
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clientCapabilities = params.Capabilities
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if len(params.WorkspaceFolders) > 0 {
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for _, f := range params.WorkspaceFolders {
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workspace.addFolder(f.URI)
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}
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} else if params.RootURI != nil {
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workspace.addFolder(*params.RootURI)
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} else if params.RootPath != nil {
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workspace.addFolder(*params.RootPath)
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}
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// To see the logs with coc.nvim, run :CocCommand workspace.showOutput
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// https://github.com/neoclide/coc.nvim/wiki/Debug-language-server#using-output-channel
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if params.Trace != nil {
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protocol.SetTraceValue(*params.Trace)
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}
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capabilities := handler.CreateServerCapabilities()
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capabilities.HoverProvider = true
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capabilities.TextDocumentSync = protocol.TextDocumentSyncKindIncremental
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capabilities.DocumentLinkProvider = &protocol.DocumentLinkOptions{
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ResolveProvider: boolPtr(true),
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}
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triggerChars := []string{"[", "#", ":"}
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capabilities.CompletionProvider = &protocol.CompletionOptions{
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TriggerCharacters: triggerChars,
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}
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capabilities.DefinitionProvider = boolPtr(true)
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return protocol.InitializeResult{
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Capabilities: capabilities,
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ServerInfo: &protocol.InitializeResultServerInfo{
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Name: opts.Name,
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Version: &opts.Version,
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},
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}, nil
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}
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handler.Initialized = func(context *glsp.Context, params *protocol.InitializedParams) error {
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return nil
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}
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handler.Shutdown = func(context *glsp.Context) error {
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protocol.SetTraceValue(protocol.TraceValueOff)
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return nil
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}
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handler.SetTrace = func(context *glsp.Context, params *protocol.SetTraceParams) error {
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protocol.SetTraceValue(params.Value)
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return nil
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}
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handler.WorkspaceDidChangeWorkspaceFolders = func(context *glsp.Context, params *protocol.DidChangeWorkspaceFoldersParams) error {
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for _, f := range params.Event.Added {
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workspace.addFolder(f.URI)
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}
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for _, f := range params.Event.Removed {
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workspace.removeFolder(f.URI)
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}
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return nil
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}
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handler.TextDocumentDidOpen = func(context *glsp.Context, params *protocol.DidOpenTextDocumentParams) error {
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langID := params.TextDocument.LanguageID
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if langID != "markdown" && langID != "vimwiki" {
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return nil
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}
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path := fs.Canonical(strings.TrimPrefix(params.TextDocument.URI, "file://"))
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server.documents[params.TextDocument.URI] = &document{
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Path: path,
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Content: params.TextDocument.Text,
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Log: server.server.Log,
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}
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return nil
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}
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handler.TextDocumentDidChange = func(context *glsp.Context, params *protocol.DidChangeTextDocumentParams) error {
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doc, ok := server.documents[params.TextDocument.URI]
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if !ok {
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return nil
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}
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doc.ApplyChanges(params.ContentChanges)
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return nil
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}
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handler.TextDocumentDidClose = func(context *glsp.Context, params *protocol.DidCloseTextDocumentParams) error {
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delete(server.documents, params.TextDocument.URI)
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return nil
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}
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handler.TextDocumentDidSave = func(context *glsp.Context, params *protocol.DidSaveTextDocumentParams) error {
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return nil
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}
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handler.TextDocumentCompletion = func(context *glsp.Context, params *protocol.CompletionParams) (interface{}, error) {
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triggerChar := params.Context.TriggerCharacter
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if params.Context.TriggerKind != protocol.CompletionTriggerKindTriggerCharacter || triggerChar == nil {
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return nil, nil
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}
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doc, ok := server.documents[params.TextDocument.URI]
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if !ok {
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return nil, nil
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}
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notebook, err := server.notebookOf(doc)
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if err != nil {
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return nil, err
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}
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switch *triggerChar {
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case "#":
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if notebook.Config.Format.Markdown.Hashtags {
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return server.buildTagCompletionList(notebook, "#")
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}
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case ":":
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if notebook.Config.Format.Markdown.ColonTags {
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return server.buildTagCompletionList(notebook, ":")
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}
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case "[":
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if doc.LookBehind(params.Position, 2) == "[[" {
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return server.buildLinkCompletionList(doc, notebook, params)
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}
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}
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return nil, nil
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}
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handler.TextDocumentHover = func(context *glsp.Context, params *protocol.HoverParams) (*protocol.Hover, error) {
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doc, ok := server.documents[params.TextDocument.URI]
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if !ok {
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return nil, nil
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}
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link, err := doc.DocumentLinkAt(params.Position)
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if link == nil || err != nil {
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return nil, err
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}
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notebook, err := server.notebookOf(doc)
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if err != nil {
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return nil, err
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}
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target, err := server.targetForHref(link.Href, doc, notebook)
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if err != nil || target == "" || strutil.IsURL(target) {
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return nil, err
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}
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target = strings.TrimPrefix(target, "file://")
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contents, err := ioutil.ReadFile(target)
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if err != nil {
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return nil, err
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}
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return &protocol.Hover{
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Contents: protocol.MarkupContent{
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Kind: protocol.MarkupKindMarkdown,
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Value: string(contents),
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},
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}, nil
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}
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handler.TextDocumentDocumentLink = func(context *glsp.Context, params *protocol.DocumentLinkParams) ([]protocol.DocumentLink, error) {
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doc, ok := server.documents[params.TextDocument.URI]
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if !ok {
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return nil, nil
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}
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links, err := doc.DocumentLinks()
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if err != nil {
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return nil, err
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}
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notebook, err := server.notebookOf(doc)
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if err != nil {
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return nil, err
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}
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documentLinks := []protocol.DocumentLink{}
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for _, link := range links {
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target, err := server.targetForHref(link.Href, doc, notebook)
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if target == "" || err != nil {
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continue
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}
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documentLinks = append(documentLinks, protocol.DocumentLink{
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Range: link.Range,
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Target: &target,
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})
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}
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return documentLinks, err
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}
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handler.TextDocumentDefinition = func(context *glsp.Context, params *protocol.DefinitionParams) (interface{}, error) {
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doc, ok := server.documents[params.TextDocument.URI]
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if !ok {
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return nil, nil
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}
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link, err := doc.DocumentLinkAt(params.Position)
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if link == nil || err != nil {
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return nil, err
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}
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notebook, err := server.notebookOf(doc)
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if err != nil {
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return nil, err
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}
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target, err := server.targetForHref(link.Href, doc, notebook)
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if link == nil || target == "" || err != nil {
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return nil, err
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}
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// FIXME: Waiting for https://github.com/tliron/glsp/pull/3 to be
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// merged before using LocationLink.
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if false && isTrue(clientCapabilities.TextDocument.Definition.LinkSupport) {
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return protocol.LocationLink{
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OriginSelectionRange: &link.Range,
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TargetURI: target,
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}, nil
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} else {
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return protocol.Location{
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URI: target,
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}, nil
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}
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}
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return server
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}
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func (s *Server) notebookOf(doc *document) (*core.Notebook, error) {
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return s.notebooks.Open(doc.Path)
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}
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// targetForHref returns the LSP documentUri for the note at the given HREF.
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func (s *Server) targetForHref(href string, doc *document, notebook *core.Notebook) (string, error) {
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if strutil.IsURL(href) {
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return href, nil
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} else {
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path := filepath.Clean(filepath.Join(filepath.Dir(doc.Path), href))
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path, err := filepath.Rel(notebook.Path, path)
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if err != nil {
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return "", errors.Wrapf(err, "failed to resolve href: %s", href)
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}
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note, err := notebook.FindByHref(path)
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if err != nil {
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s.logger.Printf("findByHref(%s): %s", href, err.Error())
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return "", err
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}
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if note == nil {
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return "", nil
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}
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return "file://" + filepath.Join(notebook.Path, note.Path), nil
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}
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}
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// Run starts the Language Server in stdio mode.
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func (s *Server) Run() error {
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return errors.Wrap(s.server.RunStdio(), "lsp")
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}
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func (s *Server) buildTagCompletionList(notebook *core.Notebook, triggerChar string) ([]protocol.CompletionItem, error) {
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tags, err := notebook.FindCollections(core.CollectionKindTag)
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if err != nil {
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return nil, err
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}
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var items []protocol.CompletionItem
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for _, tag := range tags {
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items = append(items, protocol.CompletionItem{
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Label: tag.Name,
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InsertText: s.buildInsertForTag(tag.Name, triggerChar, notebook.Config),
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Detail: stringPtr(fmt.Sprintf("%d %s", tag.NoteCount, strutil.Pluralize("note", tag.NoteCount))),
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})
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}
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return items, nil
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}
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func (s *Server) buildInsertForTag(name string, triggerChar string, config core.Config) *string {
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switch triggerChar {
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case ":":
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name += ":"
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case "#":
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if strings.Contains(name, " ") {
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if config.Format.Markdown.MultiwordTags {
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name += "#"
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} else {
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name = strings.ReplaceAll(name, " ", "\\ ")
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}
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}
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}
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return &name
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}
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func (s *Server) buildLinkCompletionList(doc *document, notebook *core.Notebook, params *protocol.CompletionParams) ([]protocol.CompletionItem, error) {
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linkFormatter, err := notebook.NewLinkFormatter()
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if err != nil {
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return nil, err
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}
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notes, err := notebook.FindNotes(core.NoteFindOpts{})
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if err != nil {
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return nil, err
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}
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var items []protocol.CompletionItem
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for _, note := range notes {
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textEdit, err := s.buildTextEditForLink(notebook, note, doc, params.Position, linkFormatter)
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if err != nil {
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s.logger.Err(errors.Wrapf(err, "failed to build TextEdit for note at %s", note.Path))
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continue
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}
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label := note.Title
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if label == "" {
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label = note.Path
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}
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items = append(items, protocol.CompletionItem{
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Label: label,
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TextEdit: textEdit,
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Documentation: protocol.MarkupContent{
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Kind: protocol.MarkupKindMarkdown,
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Value: note.RawContent,
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},
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})
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}
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return items, nil
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}
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func (s *Server) buildTextEditForLink(notebook *core.Notebook, note core.ContextualNote, document *document, pos protocol.Position, linkFormatter core.LinkFormatter) (interface{}, error) {
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path := filepath.Join(notebook.Path, note.Path)
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path = s.fs.Canonical(path)
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path, err := filepath.Rel(filepath.Dir(document.Path), path)
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if err != nil {
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path = note.Path
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}
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link, err := linkFormatter(path, note.Title)
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if err != nil {
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return nil, err
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}
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// Overwrite [[ trigger
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start := pos
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start.Character -= 2
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return protocol.TextEdit{
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Range: protocol.Range{
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Start: start,
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End: pos,
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},
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NewText: link,
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}, nil
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}
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func positionInRange(content string, rng protocol.Range, pos protocol.Position) bool {
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start, end := rng.IndexesIn(content)
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i := pos.IndexIn(content)
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return i >= start && i <= end
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}
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func boolPtr(v bool) *bool {
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b := v
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return &b
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}
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func isTrue(v *bool) bool {
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return v != nil && *v == true
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}
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func isFalse(v *bool) bool {
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return v == nil || *v == false
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}
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func stringPtr(v string) *string {
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s := v
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return &s
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}
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