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Copy pathrpc_plugin.go
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354 lines (307 loc) · 7.52 KB
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package main
import (
"bufio"
"context"
"fmt"
"os/exec"
"github.com/unxed/f4/sdk/f4rpc"
"github.com/unxed/f4/vfs"
"github.com/unxed/vtinput"
"github.com/unxed/vtui"
"github.com/vmihailenco/msgpack/v5"
)
type HighlightReq struct {
Line string
Prev any
Base uint64
}
type HighlightRes struct {
Attrs []uint64
Next any
}
type ProgressTaskReq struct {
Title string
StartMsg string
Forked bool
}
type ProgressUpdateReq struct {
Msg string
Percent int
}
type HotkeyReq struct {
VK uint16
Mods uint32
}
type OpenReq struct {
Drive string
Path string
}
type OpenRes struct {
ID uint32
Size int64
}
type ReadAtReq struct {
ID uint32
Len int
Off int64
}
type WriteReq struct {
ID uint32
Data []byte
}
type CloseReq struct {
ID uint32
}
type MkDirReq struct {
Drive string
Path string
}
type RemoveReq struct {
Drive string
Path string
}
type RenameReq struct {
Drive string
Old string
New string
}
type AskOverwriteReq struct {
Path string
Src vfs.VFSItem
Dst vfs.VFSItem
}
type AskOverwriteRes struct {
Choice int
Remember bool
}
type AskErrorReq struct {
Op string
Err string
}
type SetAttrReq struct {
Drive string
Path string
Item vfs.VFSItem
}
type InputBoxReq struct {
Title string
Prompt string
Default string
}
type MenuReq struct {
Title string
Items []string
}
// RPCPlugin manages the lifecycle of an external process plugin.
type RPCPlugin struct {
path string
cmd *exec.Cmd
sess *f4rpc.Session
api vfs.HostAPI
closing bool
}
func NewRPCPlugin(path string) *RPCPlugin {
return &RPCPlugin{path: path}
}
func (p *RPCPlugin) GetName() string {
return p.path + " (RPC)"
}
func (p *RPCPlugin) Init(api vfs.HostAPI) error {
p.api = api
p.cmd = exec.Command(p.path)
stdin, err := p.cmd.StdinPipe()
if err != nil {
return err
}
stdout, err := p.cmd.StdoutPipe()
if err != nil {
return err
}
stderr, err := p.cmd.StderrPipe()
if err != nil {
return err
}
// Forward stderr to global debug log
go func() {
scanner := bufio.NewScanner(stderr)
for scanner.Scan() {
vtui.DebugLog("PLUGIN_STDERR [%s]: %s", p.path, scanner.Text())
}
}()
if err := p.cmd.Start(); err != nil {
return err
}
p.sess = f4rpc.NewSession(stdout, stdin)
// Register Host API methods for the plugin to call
p.sess.Register("Host.Log", func(data msgpack.RawMessage) (any, error) {
var msg string
msgpack.Unmarshal(data, &msg)
api.Log(msg)
return nil, nil
})
p.sess.Register("Host.Message", func(data msgpack.RawMessage) (any, error) {
var msg string
msgpack.Unmarshal(data, &msg)
api.Message(msg)
return nil, nil
})
p.sess.Register("Host.GetVersion", func(data msgpack.RawMessage) (any, error) {
return api.GetVersion(), nil
})
p.sess.Register("Host.RegisterHighlighter", func(data msgpack.RawMessage) (any, error) {
api.RegisterHighlighter(&rpcHighlighterProvider{p})
return nil, nil
})
p.sess.Register("Host.RegisterGlobalHotkey", func(data msgpack.RawMessage) (any, error) {
var req HotkeyReq
msgpack.Unmarshal(data, &req)
api.RegisterGlobalHotkey(req.VK, vtinput.ControlKeyState(req.Mods), func(app vfs.App) {
_ = p.sess.Call("Plugin.OnHotkey", req, nil)
})
return nil, nil
})
// Session-local state for active progress task
// Session-local state for active progress task
var taskUpdate func(string, int)
var taskCtx context.Context
var taskAnchor vtui.Frame
p.sess.Register("Host.RunProgressTask", func(data msgpack.RawMessage) (any, error) {
var req ProgressTaskReq
msgpack.Unmarshal(data, &req)
vtui.FrameManager.PostTask(func() {
var pf *PanelsFrame
if len(vtui.FrameManager.Screens) > 0 {
for _, f := range vtui.FrameManager.Screens[vtui.FrameManager.ActiveIdx].Frames {
if p, ok := f.(*PanelsFrame); ok {
pf = p
break
}
}
}
if pf == nil {
return
}
pf.RunProgressTask(req.Title, req.StartMsg, req.Forked, func(ctx context.Context, update func(msg string, percent int)) error {
taskUpdate = update
taskCtx = ctx
taskAnchor = vtui.FrameManager.GetTopFrame()
return p.sess.Call("Plugin.OnProgressTask", nil, nil)
}, func(err error) {
taskUpdate = nil
taskCtx = nil
taskAnchor = nil
})
})
return nil, nil
})
p.sess.Register("Host.UpdateProgress", func(data msgpack.RawMessage) (any, error) {
var req ProgressUpdateReq
msgpack.Unmarshal(data, &req)
if taskUpdate != nil {
taskUpdate(req.Msg, req.Percent)
}
return nil, nil
})
p.sess.Register("Host.IsProgressCancelled", func(data msgpack.RawMessage) (any, error) {
if taskCtx != nil {
return taskCtx.Err() != nil, nil
}
return false, nil
})
p.sess.Register("Host.AskOverwrite", func(data msgpack.RawMessage) (any, error) {
var req AskOverwriteReq
msgpack.Unmarshal(data, &req)
ctx := taskCtx
if ctx == nil {
ctx = context.Background()
}
choice, remember := AskOverwrite(ctx, req.Path, req.Src, req.Dst, taskAnchor)
return AskOverwriteRes{Choice: choice, Remember: remember}, nil
})
p.sess.Register("Host.AskError", func(data msgpack.RawMessage) (any, error) {
var req AskErrorReq
msgpack.Unmarshal(data, &req)
ctx := taskCtx
if ctx == nil {
ctx = context.Background()
}
choice := AskError(ctx, req.Op, fmt.Errorf("%s", req.Err), taskAnchor)
return choice, nil
})
p.sess.Register("Host.InputBox", func(data msgpack.RawMessage) (any, error) {
var req InputBoxReq
msgpack.Unmarshal(data, &req)
resChan := make(chan string, 1)
vtui.FrameManager.PostTask(func() {
vtui.InputBox(req.Title, req.Prompt, req.Default, func(s string) {
resChan <- s
})
})
return <-resChan, nil
})
p.sess.Register("Host.Menu", func(data msgpack.RawMessage) (any, error) {
var req MenuReq
msgpack.Unmarshal(data, &req)
resChan := make(chan int, 1)
vtui.FrameManager.PostTask(func() {
// Find PanelsFrame for context-aware menu
var pf *PanelsFrame
if len(vtui.FrameManager.Screens) > 0 {
for _, f := range vtui.FrameManager.Screens[vtui.FrameManager.ActiveIdx].Frames {
if p, ok := f.(*PanelsFrame); ok {
pf = p
break
}
}
}
if pf != nil {
pf.Menu(req.Title, req.Items, func(idx int) { resChan <- idx })
} else {
resChan <- -1
}
})
return <-resChan, nil
})
go func() {
err := p.sess.Serve()
if !p.closing {
vtui.DebugLog("RPC Plugin %q terminated unexpectedly: %v", p.path, err)
}
}()
// Query plugin for its capabilities (drives)
type PluginInitRes struct {
Drives []string
}
var res PluginInitRes
if err := p.sess.Call("Plugin.Init", nil, &res); err != nil {
return fmt.Errorf("Plugin.Init failed: %v", err)
}
for _, drive := range res.Drives {
driveName := drive // closure capture
api.RegisterDrive(driveName, func() vfs.VFS {
return NewRPCVFS(p.sess, driveName)
})
}
return nil
}
type rpcHighlighterProvider struct{ p *RPCPlugin }
func (r *rpcHighlighterProvider) Name() string { return r.p.path }
func (r *rpcHighlighterProvider) Match(f, c string) bool { return true }
func (r *rpcHighlighterProvider) Create(f, c string) vtui.Highlighter { return &rpcHighlighter{r.p} }
type rpcHighlighter struct{ p *RPCPlugin }
func (h *rpcHighlighter) Highlight(line string, prev any, base uint64) ([]uint64, any) {
var res HighlightRes
err := h.p.sess.Call("VFS.Highlight", HighlightReq{Line: line, Prev: prev, Base: base}, &res)
if err != nil {
return nil, nil
}
return res.Attrs, res.Next
}
func (p *RPCPlugin) Close() error {
p.closing = true
if p.cmd != nil && p.cmd.Process != nil {
p.cmd.Process.Kill()
p.cmd.Wait()
}
return nil
}