/
files.go
213 lines (188 loc) · 5.19 KB
/
files.go
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package acmelsp
import (
"context"
"fmt"
"log"
"sync"
"github.com/fhs/acme-lsp/internal/acme"
"github.com/fhs/acme-lsp/internal/acmeutil"
"github.com/fhs/acme-lsp/internal/lsp"
"github.com/fhs/acme-lsp/internal/lsp/acmelsp/config"
"github.com/fhs/acme-lsp/internal/lsp/text"
"github.com/fhs/go-lsp-internal/lsp/protocol"
)
// FileManager keeps track of open files in acme.
// It is used to synchronize text with LSP server.
//
// Note that we can't cache the *acmeutil.Win for the windows
// because having the ctl file open prevents del event from
// being delivered to acme/log file.
type FileManager struct {
ss *ServerSet
wins map[string]struct{} // set of open files
mu sync.Mutex
cfg *config.Config
}
// NewFileManager creates a new file manager, initialized with files currently open in acme.
func NewFileManager(ss *ServerSet, cfg *config.Config) (*FileManager, error) {
fm := &FileManager{
ss: ss,
wins: make(map[string]struct{}),
cfg: cfg,
}
wins, err := acme.Windows()
if err != nil {
return nil, fmt.Errorf("failed to read list of acme index: %v", err)
}
for _, info := range wins {
err := fm.didOpen(info.ID, info.Name)
if err != nil {
return nil, err
}
}
return fm, nil
}
// Run 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 (fm *FileManager) Run() {
alog, err := acme.Log()
if err != nil {
log.Printf("file manager opening acme/log: %v", err)
return
}
defer alog.Close()
for {
ev, err := alog.Read()
if err != nil {
log.Printf("file manager reading acme/log: %v", err)
return
}
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 fm.cfg.FormatOnPut {
if err := fm.format(ev.ID, ev.Name); err != nil && Verbose {
log.Printf("Format failed in file manager: %v", err)
}
}
}
}
}
func (fm *FileManager) withClient(winid int, name string, f func(*Client, *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.Client, win)
}
func (fm *FileManager) didOpen(winid int, name string) error {
return fm.withClient(winid, name, func(c *Client, 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 lsp.DidOpen(context.Background(), c, name, c.cfg.FilenameHandler.LanguageID, 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, _ *acmeutil.Win) error {
return lsp.DidClose(context.Background(), c, 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, w *acmeutil.Win) error {
b, err := w.ReadAll("body")
if err != nil {
return err
}
return lsp.DidChange(context.Background(), c, name, b)
})
}
func (fm *FileManager) DidChange(winid int) error {
w, err := acmeutil.OpenWin(winid)
if err != nil {
return err
}
defer w.CloseFiles()
name, err := w.Filename()
if err != nil {
return fmt.Errorf("could not get filename for window %v: %v", winid, err)
}
// TODO(fhs): we are opening the window again in didChange.
return fm.didChange(winid, name)
}
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, 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 = lsp.DidChange(context.Background(), c, name, b)
if err != nil {
return err
}
return lsp.DidSave(context.Background(), c, 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, w *acmeutil.Win) error {
doc := &protocol.TextDocumentIdentifier{
URI: text.ToURI(name),
}
return CodeActionAndFormat(context.Background(), c, doc, w, fm.cfg.CodeActionsOnPut)
})
}