mirror of
https://github.com/go-sylixos/elvish.git
synced 2024-12-14 02:57:52 +08:00
93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
package edit
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import (
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"errors"
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"src.elv.sh/pkg/cli"
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"src.elv.sh/pkg/cli/histutil"
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"src.elv.sh/pkg/cli/modes"
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"src.elv.sh/pkg/cli/tk"
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"src.elv.sh/pkg/eval"
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)
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//elvdoc:var history:binding
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//
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// Binding table for the history mode.
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//elvdoc:fn history:start
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//
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// Starts the history mode.
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//elvdoc:fn history:up
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//
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// Walks to the previous entry in history mode.
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//elvdoc:fn history:down
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//
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// Walks to the next entry in history mode.
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//elvdoc:fn history:down-or-quit
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//
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// Walks to the next entry in history mode, or quit the history mode if already
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// at the newest entry.
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//elvdoc:fn history:fast-forward
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//
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// Import command history entries that happened after the current session
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// started.
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func initHistWalk(ed *Editor, ev *eval.Evaler, hs *histStore, nb eval.NsBuilder) {
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bindingVar := newBindingVar(emptyBindingsMap)
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bindings := newMapBindings(ed, ev, bindingVar)
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app := ed.app
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nb.AddNs("history",
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eval.BuildNsNamed("edit:history").
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AddVar("binding", bindingVar).
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AddGoFns(map[string]interface{}{
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"start": func() { notifyError(app, histwalkStart(app, hs, bindings)) },
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"up": func() { notifyError(app, histwalkDo(app, modes.Histwalk.Prev)) },
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"down": func() { notifyError(app, histwalkDo(app, modes.Histwalk.Next)) },
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"down-or-quit": func() {
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err := histwalkDo(app, modes.Histwalk.Next)
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if err == histutil.ErrEndOfHistory {
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app.PopAddon()
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} else {
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notifyError(app, err)
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}
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},
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"fast-forward": hs.FastForward,
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}))
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}
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func histwalkStart(app cli.App, hs *histStore, bindings tk.Bindings) error {
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codeArea, ok := focusedCodeArea(app)
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if !ok {
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return nil
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}
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buf := codeArea.CopyState().Buffer
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w, err := modes.NewHistwalk(app, modes.HistwalkSpec{
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Bindings: bindings, Store: hs, Prefix: buf.Content[:buf.Dot]})
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if w != nil {
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app.PushAddon(w)
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}
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return err
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}
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var errNotInHistoryMode = errors.New("not in history mode")
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func histwalkDo(app cli.App, f func(modes.Histwalk) error) error {
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w, ok := app.ActiveWidget().(modes.Histwalk)
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if !ok {
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return errNotInHistoryMode
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}
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return f(w)
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}
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func notifyError(app cli.App, err error) {
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if err != nil {
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app.Notify(modes.ErrorText(err))
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}
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}
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