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Tell LSP server about new, del, get, and put events in acme/log
Before we were only handling put for formatting. Now we handle all events related to file synchronization. We also send all open files to LSP server on startup. Helps #6
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,182 @@ | ||
| package acmelsp | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "log" | ||
| "sync" | ||
|
|
||
| "9fans.net/go/acme" | ||
| "github.com/fhs/acme-lsp/internal/acmeutil" | ||
| "github.com/fhs/acme-lsp/internal/lsp/client" | ||
| "github.com/fhs/acme-lsp/internal/lsp/text" | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| // ManageFiles watches for files opened, closed, saved, or refreshed in acme | ||
| // and tells LSP server about it. It also formats files when it's saved. | ||
| func ManageFiles(serverSet *client.ServerSet, fm *FileManager) { | ||
| alog, err := acme.Log() | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer alog.Close() | ||
|
|
||
| for { | ||
| ev, err := alog.Read() | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| switch ev.Op { | ||
| case "new": | ||
| if err := fm.didOpen(ev.ID, ev.Name); err != nil { | ||
| log.Printf("didOpen failed in file manager: %v", err) | ||
| } | ||
| case "del": | ||
| if err := fm.didClose(ev.Name); err != nil { | ||
| log.Printf("didClose failed in file manager: %v", err) | ||
| } | ||
| case "get": | ||
| if err := fm.didChange(ev.ID, ev.Name); err != nil { | ||
| log.Printf("didChange failed in file manager: %v", err) | ||
| } | ||
| case "put": | ||
| if err := fm.didSave(ev.ID, ev.Name); err != nil { | ||
| log.Printf("didSave failed in file manager: %v", err) | ||
| } | ||
| if err := fm.format(ev.ID, ev.Name); err != nil { | ||
| log.Printf("Format failed in file manager: %v", err) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // FileManager keeps track of open files in acme. | ||
| // It is used to synchronize text with LSP server. | ||
| type FileManager struct { | ||
| ss *client.ServerSet | ||
| wins map[string]struct{} // set of open files | ||
| mu sync.Mutex | ||
| } | ||
|
|
||
| // NewFileManager creates a new file manager, initialized with files currently open in acme. | ||
| func NewFileManager(ss *client.ServerSet) (*FileManager, error) { | ||
| fm := &FileManager{ | ||
| ss: ss, | ||
| wins: make(map[string]struct{}), | ||
| } | ||
|
|
||
| wins, err := acme.Windows() | ||
| if err != nil { | ||
| return nil, errors.Wrapf(err, "failed to read list of acme index") | ||
| } | ||
| for _, info := range wins { | ||
| err := fm.didOpen(info.ID, info.Name) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
| return fm, nil | ||
| } | ||
|
|
||
| func (fm *FileManager) withClient(winid int, name string, f func(*client.Conn, *acmeutil.Win) error) error { | ||
| s, found, err := fm.ss.StartForFile(name) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if !found { | ||
| return nil // Unknown language server. | ||
| } | ||
|
|
||
| var win *acmeutil.Win | ||
| if winid >= 0 { | ||
| w, err := acmeutil.OpenWin(winid) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer w.CloseFiles() | ||
| win = w | ||
| } | ||
| return f(s.Conn, win) | ||
| } | ||
|
|
||
| func (fm *FileManager) didOpen(winid int, name string) error { | ||
| return fm.withClient(winid, name, func(c *client.Conn, w *acmeutil.Win) error { | ||
| fm.mu.Lock() | ||
| defer fm.mu.Unlock() | ||
|
|
||
| if _, ok := fm.wins[name]; ok { | ||
| return fmt.Errorf("file already open in file manager: %v", name) | ||
| } | ||
| fm.wins[name] = struct{}{} | ||
|
|
||
| b, err := w.ReadAll("body") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return c.DidOpen(name, b) | ||
| }) | ||
| } | ||
|
|
||
| func (fm *FileManager) didClose(name string) error { | ||
| fm.mu.Lock() | ||
| defer fm.mu.Unlock() | ||
|
|
||
| if _, ok := fm.wins[name]; !ok { | ||
| return nil // Unknown language server. | ||
| } | ||
| delete(fm.wins, name) | ||
|
|
||
| return fm.withClient(-1, name, func(c *client.Conn, _ *acmeutil.Win) error { | ||
| return c.DidClose(name) | ||
| }) | ||
| } | ||
|
|
||
| func (fm *FileManager) didChange(winid int, name string) error { | ||
| fm.mu.Lock() | ||
| defer fm.mu.Unlock() | ||
|
|
||
| if _, ok := fm.wins[name]; !ok { | ||
| return nil // Unknown language server. | ||
| } | ||
| return fm.withClient(winid, name, func(c *client.Conn, w *acmeutil.Win) error { | ||
| b, err := w.ReadAll("body") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return c.DidChange(name, b) | ||
| }) | ||
| } | ||
|
|
||
| func (fm *FileManager) didSave(winid int, name string) error { | ||
| fm.mu.Lock() | ||
| defer fm.mu.Unlock() | ||
|
|
||
| if _, ok := fm.wins[name]; !ok { | ||
| return nil // Unknown language server. | ||
| } | ||
| return fm.withClient(winid, name, func(c *client.Conn, w *acmeutil.Win) error { | ||
| b, err := w.ReadAll("body") | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // TODO(fhs): Maybe DidChange is not needed with includeText option to DidSave? | ||
| err = c.DidChange(name, b) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return c.DidSave(name) | ||
| }) | ||
| } | ||
|
|
||
| func (fm *FileManager) format(winid int, name string) error { | ||
| fm.mu.Lock() | ||
| defer fm.mu.Unlock() | ||
|
|
||
| if _, ok := fm.wins[name]; !ok { | ||
| return nil // Unknown language server. | ||
| } | ||
| return fm.withClient(winid, name, func(c *client.Conn, w *acmeutil.Win) error { | ||
| return FormatFile(c, text.ToURI(name), w) | ||
| }) | ||
| } |
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