forked from keybase/client
-
Notifications
You must be signed in to change notification settings - Fork 0
/
readonly_node.go
41 lines (32 loc) · 1.02 KB
/
readonly_node.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
// Copyright 2018 Keybase Inc. All rights reserved.
// Use of this source code is governed by a BSD
// license that can be found in the LICENSE file.
package libkbfs
import (
"context"
)
// CtxReadWriteKeyType is the type of the key for overriding read-only
// nodes.
type CtxReadWriteKeyType int
const (
// CtxReadWriteKey is a context key to indicate that a read-only
// node should be treated as read-write.
CtxReadWriteKey CtxReadWriteKeyType = 1
)
// ReadonlyNode is a read-only node by default, unless `CtxReadWriteKey`
// has a value set in the context.
type ReadonlyNode struct {
Node
}
var _ Node = (*ReadonlyNode)(nil)
// Readonly implements the Node interface for ReadonlyNode.
func (rn ReadonlyNode) Readonly(ctx context.Context) bool {
return ctx.Value(CtxReadWriteKey) == nil
}
// WrapChild implements the Node interface for ReadonlyNode.
func (rn ReadonlyNode) WrapChild(child Node) Node {
return &ReadonlyNode{rn.Node.WrapChild(child)}
}
func readonlyWrapper(node Node) Node {
return &ReadonlyNode{Node: node}
}