vendor tsgo

tools/tsgo/internal/project/filechange.go

@@ -0,0 +1,86 @@
+package project
+
+import (
+	"github.com/microsoft/typescript-go/internal/collections"
+	"github.com/microsoft/typescript-go/internal/lsp/lsproto"
+)
+
+const excessiveChangeThreshold = 1000
+
+type FileChangeKind int
+
+const (
+	FileChangeKindOpen FileChangeKind = iota
+	FileChangeKindClose
+	FileChangeKindChange
+	FileChangeKindSave
+	FileChangeKindWatchCreate
+	FileChangeKindWatchChange
+	FileChangeKindWatchDelete
+)
+
+func (k FileChangeKind) IsWatchKind() bool {
+	return k == FileChangeKindWatchCreate || k == FileChangeKindWatchChange || k == FileChangeKindWatchDelete
+}
+
+type FileChange struct {
+	Kind         FileChangeKind
+	URI          lsproto.DocumentUri
+	Version      int32                                                     // Only set for Open/Change
+	Content      string                                                    // Only set for Open
+	LanguageKind lsproto.LanguageKind                                      // Only set for Open
+	Changes      []lsproto.TextDocumentContentChangePartialOrWholeDocument // Only set for Change
+}
+
+type FileChangeSummary struct {
+	// Only one file can be opened at a time per request
+	Opened lsproto.DocumentUri
+	// Reopened is set if a close and open occurred for the same file in a single batch of changes.
+	Reopened lsproto.DocumentUri
+	Closed   collections.Set[lsproto.DocumentUri]
+	Changed  collections.Set[lsproto.DocumentUri]
+	// Only set when file watching is enabled
+	Created collections.Set[lsproto.DocumentUri]
+	// Only set when file watching is enabled
+	Deleted collections.Set[lsproto.DocumentUri]
+
+	// IncludesWatchChangeOutsideNodeModules is true if the summary includes a create, change, or delete watch
+	// event of a file outside a node_modules directory.
+	IncludesWatchChangeOutsideNodeModules bool
+	// InvalidateAll indicates that all cached file state should be discarded.
+	InvalidateAll bool
+}
+
+func (f FileChangeSummary) IsEmpty() bool {
+	return !f.InvalidateAll && f.Opened == "" && f.Reopened == "" && f.Closed.Len() == 0 && f.Changed.Len() == 0 && f.Created.Len() == 0 && f.Deleted.Len() == 0
+}
+
+func (f FileChangeSummary) HasExcessiveWatchEvents() bool {
+	return f.InvalidateAll || f.Created.Len()+f.Deleted.Len()+f.Changed.Len() > excessiveChangeThreshold
+}
+
+func (f FileChangeSummary) HasExcessiveNonCreateWatchEvents() bool {
+	return f.InvalidateAll || f.Deleted.Len()+f.Changed.Len() > excessiveChangeThreshold
+}
+
+// mergeFileChangeSummary merges src into dst, combining their change sets.
+func mergeFileChangeSummary(dst *FileChangeSummary, src FileChangeSummary) {
+	if src.IsEmpty() {
+		return
+	}
+	if src.InvalidateAll {
+		dst.InvalidateAll = true
+	}
+	for uri := range src.Changed.Keys() {
+		dst.Changed.Add(uri)
+	}
+	for uri := range src.Created.Keys() {
+		dst.Created.Add(uri)
+	}
+	for uri := range src.Deleted.Keys() {
+		dst.Deleted.Add(uri)
+	}
+	if src.IncludesWatchChangeOutsideNodeModules {
+		dst.IncludesWatchChangeOutsideNodeModules = true
+	}
+}