60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
//go:build js && wasm
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package main
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import (
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"context"
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"errors"
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"github.com/alecthomas/participle/v2"
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"strings"
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"syscall/js"
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"ucl.lmika.dev/repl"
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"ucl.lmika.dev/ucl"
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"ucl.lmika.dev/ucl/builtins"
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)
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func invokeUCLCallback(name string, args ...any) {
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if onLine := js.Global().Get("ucl").Get(name); !onLine.IsNull() {
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onLine.Invoke(args...)
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}
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}
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func initJS(ctx context.Context) {
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uclObj := make(map[string]any)
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replInst := repl.New(
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ucl.WithModule(builtins.Log(nil)),
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ucl.WithModule(builtins.Strs()),
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ucl.WithModule(builtins.Time()),
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ucl.WithOut(ucl.LineHandler(func(line string) {
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invokeUCLCallback("onOutLine", line)
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})),
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)
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uclObj["eval"] = js.FuncOf(func(this js.Value, args []js.Value) any {
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if len(args) != 2 {
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return nil
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}
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cmdLine := args[0].String()
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if strings.TrimSpace(cmdLine) == "" {
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invokeUCLCallback("onNewCommand")
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return nil
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}
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wantContinue := args[1].Bool()
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if err := replInst.EvalAndDisplay(ctx, cmdLine); err != nil {
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var p participle.Error
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if errors.As(err, &p) && wantContinue {
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invokeUCLCallback("onContinue")
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return nil
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}
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invokeUCLCallback("onError", err.Error())
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}
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invokeUCLCallback("onNewCommand")
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return nil
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})
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js.Global().Set("ucl", uclObj)
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}
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