package widgets import ( "fmt" "math" "strings" sortthread "github.com/emersion/go-imap-sortthread" "github.com/gdamore/tcell/v2" "github.com/mattn/go-runewidth" "git.sr.ht/~rjarry/aerc/config" "git.sr.ht/~rjarry/aerc/lib" "git.sr.ht/~rjarry/aerc/lib/format" "git.sr.ht/~rjarry/aerc/lib/ui" "git.sr.ht/~rjarry/aerc/logging" "git.sr.ht/~rjarry/aerc/models" "git.sr.ht/~rjarry/aerc/worker/types" ) type MessageList struct { ui.Invalidatable Scrollable conf *config.AercConfig height int nmsgs int spinner *Spinner store *lib.MessageStore isInitalizing bool aerc *Aerc } func NewMessageList(conf *config.AercConfig, aerc *Aerc) *MessageList { ml := &MessageList{ conf: conf, spinner: NewSpinner(&conf.Ui), isInitalizing: true, aerc: aerc, } ml.spinner.OnInvalidate(func(_ ui.Drawable) { ml.Invalidate() }) // TODO: stop spinner, probably ml.spinner.Start() return ml } func (ml *MessageList) Invalidate() { ml.DoInvalidate(ml) } func (ml *MessageList) Draw(ctx *ui.Context) { ml.height = ctx.Height() uiConfig := ml.aerc.SelectedAccountUiConfig() ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', uiConfig.GetStyle(config.STYLE_MSGLIST_DEFAULT)) acct := ml.aerc.SelectedAccount() store := ml.Store() if store == nil || acct == nil { if ml.isInitalizing { ml.spinner.Draw(ctx) return } else { ml.spinner.Stop() ml.drawEmptyMessage(ctx) return } } ml.UpdateScroller(ml.height, len(store.Uids())) if store := ml.Store(); store != nil && len(store.Uids()) > 0 { idx := store.FindIndexByUid(store.SelectedUid()) if idx < 0 { idx = len(store.Uids()) - 1 } ml.EnsureScroll(len(store.Uids()) - idx - 1) } textWidth := ctx.Width() if ml.NeedScrollbar() { textWidth -= 1 } if textWidth < 0 { textWidth = 0 } var ( needsHeaders []uint32 row int = 0 ) if store.ThreadedView() { threads := store.Threads() counter := len(store.Uids()) for i := len(threads) - 1; i >= 0; i-- { var lastSubject string err := threads[i].Walk(func(t *types.Thread, _ int, currentErr error) error { if currentErr != nil { return currentErr } if t.Hidden || t.Deleted { return nil } counter-- if counter > len(store.Uids())-1-ml.Scroll() { // skip messages which are higher than the viewport return nil } msg := store.Messages[t.Uid] var prefix string var subject string var normalizedSubject string if msg != nil { prefix = threadPrefix(t) if msg.Envelope != nil { subject = msg.Envelope.Subject normalizedSubject, _ = sortthread.GetBaseSubject(subject) } } fmtCtx := format.Ctx{ FromAddress: acct.acct.From, AccountName: acct.Name(), MsgInfo: msg, MsgNum: row, MsgIsMarked: store.Marker().IsMarked(t.Uid), ThreadPrefix: prefix, ThreadSameSubject: normalizedSubject == lastSubject, } if ml.drawRow(textWidth, ctx, t.Uid, row, &needsHeaders, fmtCtx) { return types.ErrSkipThread } lastSubject = normalizedSubject row++ return nil }) if err != nil { logging.Warnf("failed to walk threads: %v", err) } if row >= ctx.Height() { break } } } else { uids := store.Uids() for i := len(uids) - 1 - ml.Scroll(); i >= 0; i-- { uid := uids[i] msg := store.Messages[uid] fmtCtx := format.Ctx{ FromAddress: acct.acct.From, AccountName: acct.Name(), MsgInfo: msg, MsgNum: row, MsgIsMarked: store.Marker().IsMarked(uid), } if ml.drawRow(textWidth, ctx, uid, row, &needsHeaders, fmtCtx) { break } row += 1 } } if ml.NeedScrollbar() { scrollbarCtx := ctx.Subcontext(ctx.Width()-1, 0, 1, ctx.Height()) ml.drawScrollbar(scrollbarCtx) } if len(store.Uids()) == 0 { if store.Sorting { ml.spinner.Start() ml.spinner.Draw(ctx) return } else { ml.drawEmptyMessage(ctx) } } if len(needsHeaders) != 0 { store.FetchHeaders(needsHeaders, nil) ml.spinner.Start() } else { ml.spinner.Stop() } } func (ml *MessageList) drawRow(textWidth int, ctx *ui.Context, uid uint32, row int, needsHeaders *[]uint32, fmtCtx format.Ctx) bool { store := ml.store msg := store.Messages[uid] acct := ml.aerc.SelectedAccount() if row >= ctx.Height() || acct == nil { return true } if msg == nil { *needsHeaders = append(*needsHeaders, uid) ml.spinner.Draw(ctx.Subcontext(0, row, textWidth, 1)) return false } // TODO deprecate subject contextual UIs? Only related setting is styleset, // should implement a better per-message styling method // Check if we have any applicable ContextualUIConfigs confs := ml.aerc.conf.GetContextualUIConfigs() uiConfig := acct.Directories().UiConfig(store.DirInfo.Name) for _, c := range confs { if c.ContextType == config.UI_CONTEXT_SUBJECT && msg.Envelope != nil { if c.Regex.Match([]byte(msg.Envelope.Subject)) { confParams := map[config.ContextType]string{ config.UI_CONTEXT_ACCOUNT: acct.AccountConfig().Name, config.UI_CONTEXT_FOLDER: acct.Directories().Selected(), config.UI_CONTEXT_SUBJECT: msg.Envelope.Subject, } uiConfig = ml.conf.GetUiConfig(confParams) } } } msg_styles := []config.StyleObject{} // unread message seen := false flagged := false for _, flag := range msg.Flags { switch flag { case models.SeenFlag: seen = true case models.FlaggedFlag: flagged = true } } if seen { msg_styles = append(msg_styles, config.STYLE_MSGLIST_READ) } else { msg_styles = append(msg_styles, config.STYLE_MSGLIST_UNREAD) } if flagged { msg_styles = append(msg_styles, config.STYLE_MSGLIST_FLAGGED) } // deleted message if _, ok := store.Deleted[msg.Uid]; ok { msg_styles = append(msg_styles, config.STYLE_MSGLIST_DELETED) } // marked message if store.Marker().IsMarked(msg.Uid) { msg_styles = append(msg_styles, config.STYLE_MSGLIST_MARKED) } var style tcell.Style // current row if msg.Uid == ml.store.SelectedUid() { style = uiConfig.GetComposedStyleSelected(config.STYLE_MSGLIST_DEFAULT, msg_styles) } else { style = uiConfig.GetComposedStyle(config.STYLE_MSGLIST_DEFAULT, msg_styles) } ctx.Fill(0, row, ctx.Width(), 1, ' ', style) fmtStr, args, err := format.ParseMessageFormat( uiConfig.IndexFormat, uiConfig.TimestampFormat, uiConfig.ThisDayTimeFormat, uiConfig.ThisWeekTimeFormat, uiConfig.ThisYearTimeFormat, fmtCtx) if err != nil { ctx.Printf(0, row, style, "%v", err) } else { line := fmt.Sprintf(fmtStr, args...) line = runewidth.Truncate(line, textWidth, "…") ctx.Printf(0, row, style, "%s", line) } return false } func (ml *MessageList) drawScrollbar(ctx *ui.Context) { gutterStyle := tcell.StyleDefault pillStyle := tcell.StyleDefault.Reverse(true) // gutter ctx.Fill(0, 0, 1, ctx.Height(), ' ', gutterStyle) // pill pillSize := int(math.Ceil(float64(ctx.Height()) * ml.PercentVisible())) pillOffset := int(math.Floor(float64(ctx.Height()) * ml.PercentScrolled())) ctx.Fill(0, pillOffset, 1, pillSize, ' ', pillStyle) } func (ml *MessageList) MouseEvent(localX int, localY int, event tcell.Event) { if event, ok := event.(*tcell.EventMouse); ok { switch event.Buttons() { case tcell.Button1: if ml.aerc == nil { return } selectedMsg, ok := ml.Clicked(localX, localY) if ok { ml.Select(selectedMsg) acct := ml.aerc.SelectedAccount() if acct == nil || acct.Messages().Empty() { return } store := acct.Messages().Store() msg := acct.Messages().Selected() if msg == nil { return } lib.NewMessageStoreView(msg, store, ml.aerc.Crypto, ml.aerc.DecryptKeys, func(view lib.MessageView, err error) { if err != nil { ml.aerc.PushError(err.Error()) return } viewer := NewMessageViewer(acct, ml.aerc.Config(), view) ml.aerc.NewTab(viewer, msg.Envelope.Subject) }) } case tcell.WheelDown: if ml.store != nil { ml.store.Next() } ml.Invalidate() case tcell.WheelUp: if ml.store != nil { ml.store.Prev() } ml.Invalidate() } } } func (ml *MessageList) Clicked(x, y int) (int, bool) { store := ml.Store() if store == nil || ml.nmsgs == 0 || y >= ml.nmsgs { return 0, false } return y + ml.Scroll(), true } func (ml *MessageList) Height() int { return ml.height } func (ml *MessageList) storeUpdate(store *lib.MessageStore) { if ml.Store() != store { return } ml.Invalidate() } func (ml *MessageList) SetStore(store *lib.MessageStore) { if ml.Store() != store { ml.Scrollable = Scrollable{} } ml.store = store if store != nil { ml.spinner.Stop() uids := store.Uids() ml.nmsgs = len(uids) store.OnUpdate(ml.storeUpdate) store.OnFilterChange(func(store *lib.MessageStore) { if ml.Store() != store { return } ml.nmsgs = len(store.Uids()) }) } else { ml.spinner.Start() } ml.Invalidate() } func (ml *MessageList) SetInitDone() { ml.isInitalizing = false } func (ml *MessageList) Store() *lib.MessageStore { return ml.store } func (ml *MessageList) Empty() bool { store := ml.Store() return store == nil || len(store.Uids()) == 0 } func (ml *MessageList) Selected() *models.MessageInfo { return ml.Store().Selected() } func (ml *MessageList) Select(index int) { // Note that the msgstore.Select function expects a uid as argument // whereas the msglist.Select expects the message number store := ml.Store() uids := store.Uids() if len(uids) == 0 { return } uidIdx := len(uids) - index - 1 if uidIdx >= len(store.Uids()) { uidIdx = 0 } else if uidIdx < 0 { uidIdx = len(store.Uids()) - 1 } store.Select(store.Uids()[uidIdx]) ml.Invalidate() } func (ml *MessageList) drawEmptyMessage(ctx *ui.Context) { uiConfig := ml.aerc.SelectedAccountUiConfig() msg := uiConfig.EmptyMessage ctx.Printf((ctx.Width()/2)-(len(msg)/2), 0, uiConfig.GetStyle(config.STYLE_MSGLIST_DEFAULT), "%s", msg) } func threadPrefix(t *types.Thread) string { var arrow string if t.Parent != nil { if t.NextSibling != nil { arrow = "├─>" } else { arrow = "└─>" } } var prefix []string for n := t; n.Parent != nil; n = n.Parent { if n.Parent.NextSibling != nil { prefix = append(prefix, "│ ") } else { prefix = append(prefix, " ") } } // prefix is now in a reverse order (inside --> outside), so turn it for i, j := 0, len(prefix)-1; i < j; i, j = i+1, j-1 { prefix[i], prefix[j] = prefix[j], prefix[i] } // we don't want to indent the first child, hence we strip that level if len(prefix) > 0 { prefix = prefix[1:] } ps := strings.Join(prefix, "") return fmt.Sprintf("%v%v", ps, arrow) }