package widgets
import (
"fmt"
"log"
"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/models"
"git.sr.ht/~rjarry/aerc/worker/types"
)
type MessageList struct {
ui.Invalidatable
Scrollable
conf *config.AercConfig
logger *log.Logger
height int
nmsgs int
spinner *Spinner
store *lib.MessageStore
isInitalizing bool
aerc *Aerc
}
func NewMessageList(conf *config.AercConfig, logger *log.Logger, aerc *Aerc) *MessageList {
ml := &MessageList{
conf: conf,
logger: logger,
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 {
ml.EnsureScroll(store.SelectedIndex())
}
textWidth := ctx.Width()
if ml.NeedScrollbar() {
textWidth -= 1
}
if textWidth < 0 {
textWidth = 0
}
var (
needsHeaders []uint32
row int = 0
)
if uiConfig.ThreadingEnabled || store.BuildThreads() {
threads := store.Threads
counter := len(store.Uids())
for i := len(threads) - 1; i >= 0; i-- {
var lastSubject string
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.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 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.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
}
confParams := map[config.ContextType]string{
config.UI_CONTEXT_ACCOUNT: acct.AccountConfig().Name,
config.UI_CONTEXT_FOLDER: acct.Directories().Selected(),
}
if msg.Envelope != nil {
confParams[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.IsMarked(msg.Uid) {
msg_styles = append(msg_styles, config.STYLE_MSGLIST_MARKED)
}
var style tcell.Style
// current row
if row == ml.store.SelectedIndex()-ml.Scroll() {
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) {
switch event := event.(type) {
case *tcell.EventMouse:
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.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
}
uids := store.Uids()
if len(uids) > 0 {
// When new messages come in, advance the cursor accordingly
// Note that this assumes new messages are appended to the top, which
// isn't necessarily true once we implement SORT... ideally we'd look
// for the previously selected UID.
if len(uids) > ml.nmsgs && ml.nmsgs != 0 {
for i := 0; i < len(uids)-ml.nmsgs; i++ {
ml.Store().Next()
}
}
if len(uids) < ml.nmsgs && ml.nmsgs != 0 {
for i := 0; i < ml.nmsgs-len(uids); i++ {
ml.Store().Prev()
}
}
ml.nmsgs = len(uids)
}
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()
ml.nmsgs = len(store.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 {
store := ml.Store()
uids := store.Uids()
return store.Messages[uids[len(uids)-ml.store.SelectedIndex()-1]]
}
func (ml *MessageList) Select(index int) {
store := ml.Store()
store.Select(index)
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)
}
