package widgets
import (
"fmt"
"log"
"github.com/gdamore/tcell"
"github.com/mattn/go-runewidth"
"git.sr.ht/~sircmpwn/aerc/config"
"git.sr.ht/~sircmpwn/aerc/lib"
"git.sr.ht/~sircmpwn/aerc/lib/ui"
"git.sr.ht/~sircmpwn/aerc/models"
)
type MessageList struct {
ui.Invalidatable
conf *config.AercConfig
logger *log.Logger
height int
scroll int
nmsgs int
spinner *Spinner
store *lib.MessageStore
}
func NewMessageList(conf *config.AercConfig, logger *log.Logger) *MessageList {
ml := &MessageList{
conf: conf,
logger: logger,
spinner: NewSpinner(),
}
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()
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
store := ml.Store()
if store == nil {
ml.spinner.Draw(ctx)
return
}
var (
needsHeaders []uint32
row int = 0
)
for i := len(store.Uids) - 1 - ml.scroll; i >= 0; i-- {
uid := store.Uids[i]
msg := store.Messages[uid]
if row >= ctx.Height() {
break
}
if msg == nil {
needsHeaders = append(needsHeaders, uid)
ml.spinner.Draw(ctx.Subcontext(0, row, ctx.Width(), 1))
row += 1
continue
}
style := tcell.StyleDefault
// current row
if row == ml.store.SelectedIndex()-ml.scroll {
style = style.Reverse(true)
}
// deleted message
if _, ok := store.Deleted[msg.Uid]; ok {
style = style.Foreground(tcell.ColorGray)
}
// unread message
seen := false
for _, flag := range msg.Flags {
if flag == models.SeenFlag {
seen = true
}
}
if !seen {
style = style.Bold(true)
}
ctx.Fill(0, row, ctx.Width(), 1, ' ', style)
fmtStr, args, err := lib.ParseIndexFormat(ml.conf, i, msg)
if err != nil {
ctx.Printf(0, row, style, "%v", err)
} else {
line := fmt.Sprintf(fmtStr, args...)
line = runewidth.Truncate(line, ctx.Width(), "…")
ctx.Printf(0, row, style, "%s", line)
}
row += 1
}
if len(store.Uids) == 0 {
msg := ml.conf.Ui.EmptyMessage
ctx.Printf((ctx.Width()/2)-(len(msg)/2), 0,
tcell.StyleDefault, "%s", msg)
}
if len(needsHeaders) != 0 {
store.FetchHeaders(needsHeaders, nil)
ml.spinner.Start()
} else {
ml.spinner.Stop()
}
}
func (ml *MessageList) Height() int {
return ml.height
}
func (ml *MessageList) storeUpdate(store *lib.MessageStore) {
if ml.Store() != store {
return
}
if len(store.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(store.Uids) > ml.nmsgs && ml.nmsgs != 0 {
for i := 0; i < len(store.Uids)-ml.nmsgs; i++ {
ml.Store().Next()
}
}
if len(store.Uids) < ml.nmsgs && ml.nmsgs != 0 {
for i := 0; i < ml.nmsgs-len(store.Uids); i++ {
ml.Store().Prev()
}
}
ml.nmsgs = len(store.Uids)
}
ml.Scroll()
ml.Invalidate()
}
func (ml *MessageList) SetStore(store *lib.MessageStore) {
if ml.Store() != store {
ml.scroll = 0
}
ml.store = store
if store != nil {
ml.spinner.Stop()
ml.nmsgs = len(store.Uids)
store.OnUpdate(ml.storeUpdate)
} else {
ml.spinner.Start()
}
ml.Invalidate()
}
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()
return store.Messages[store.Uids[len(store.Uids)-ml.store.SelectedIndex()-1]]
}
func (ml *MessageList) Select(index int) {
store := ml.Store()
store.Select(index)
ml.Scroll()
}
func (ml *MessageList) Scroll() {
store := ml.Store()
if store == nil || len(store.Uids) == 0 {
return
}
if ml.Height() != 0 {
// I'm too lazy to do the math right now
for store.SelectedIndex()-ml.scroll >= ml.Height() {
ml.scroll += 1
}
for store.SelectedIndex()-ml.scroll < 0 {
ml.scroll -= 1
}
}
ml.Invalidate()
}