mirror of
https://git.sr.ht/~sircmpwn/aerc
synced 2024-11-24 00:52:29 +01:00
ef4c2f61d8
This allows the time to be displayed in a user-configurable way. Also localize the time in the message viewer as it is in the message list.
680 lines
16 KiB
Go
680 lines
16 KiB
Go
package widgets
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import (
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"bufio"
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"errors"
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"fmt"
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"io"
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"os/exec"
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"regexp"
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"strings"
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"github.com/danwakefield/fnmatch"
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message "github.com/emersion/go-message"
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_ "github.com/emersion/go-message/charset"
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"github.com/emersion/go-message/mail"
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"github.com/gdamore/tcell"
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"github.com/google/shlex"
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"github.com/mattn/go-runewidth"
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"git.sr.ht/~sircmpwn/aerc/config"
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"git.sr.ht/~sircmpwn/aerc/lib"
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"git.sr.ht/~sircmpwn/aerc/lib/ui"
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"git.sr.ht/~sircmpwn/aerc/models"
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)
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var ansi = regexp.MustCompile("^\x1B\\[[0-?]*[ -/]*[@-~]")
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type MessageViewer struct {
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ui.Invalidatable
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acct *AccountView
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conf *config.AercConfig
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err error
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grid *ui.Grid
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msg *models.MessageInfo
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switcher *PartSwitcher
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store *lib.MessageStore
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}
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type PartSwitcher struct {
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ui.Invalidatable
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parts []*PartViewer
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selected int
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showHeaders bool
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alwaysShowMime bool
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height int
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mv *MessageViewer
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}
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func NewMessageViewer(acct *AccountView, conf *config.AercConfig,
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store *lib.MessageStore, msg *models.MessageInfo) *MessageViewer {
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layout := HeaderLayout(conf.Viewer.HeaderLayout).forMessage(msg)
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header, headerHeight := layout.grid(
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func(header string) ui.Drawable {
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return &HeaderView{
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Name: header,
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Value: fmtHeader(msg, header, conf.Ui.TimestampFormat),
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}
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},
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)
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grid := ui.NewGrid().Rows([]ui.GridSpec{
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{ui.SIZE_EXACT, headerHeight},
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{ui.SIZE_WEIGHT, 1},
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}).Columns([]ui.GridSpec{
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{ui.SIZE_WEIGHT, 1},
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})
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switcher := &PartSwitcher{}
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err := createSwitcher(acct, switcher, conf, store, msg)
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if err != nil {
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return &MessageViewer{
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err: err,
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grid: grid,
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msg: msg,
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}
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}
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grid.AddChild(header).At(0, 0)
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grid.AddChild(switcher).At(1, 0)
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mv := &MessageViewer{
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acct: acct,
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conf: conf,
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grid: grid,
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msg: msg,
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store: store,
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switcher: switcher,
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}
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switcher.mv = mv
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return mv
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}
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func fmtHeader(msg *models.MessageInfo, header string, timefmt string) string {
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switch header {
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case "From":
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return models.FormatAddresses(msg.Envelope.From)
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case "To":
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return models.FormatAddresses(msg.Envelope.To)
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case "Cc":
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return models.FormatAddresses(msg.Envelope.Cc)
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case "Bcc":
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return models.FormatAddresses(msg.Envelope.Bcc)
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case "Date":
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return msg.Envelope.Date.Local().Format(timefmt)
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case "Subject":
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return msg.Envelope.Subject
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default:
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return msg.RFC822Headers.Get(header)
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}
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}
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func enumerateParts(acct *AccountView, conf *config.AercConfig, store *lib.MessageStore,
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msg *models.MessageInfo, body *models.BodyStructure,
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index []int) ([]*PartViewer, error) {
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var parts []*PartViewer
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for i, part := range body.Parts {
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curindex := append(index, i+1)
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if part.MIMEType == "multipart" {
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// Multipart meta-parts are faked
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pv := &PartViewer{part: part}
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parts = append(parts, pv)
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subParts, err := enumerateParts(
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acct, conf, store, msg, part, curindex)
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if err != nil {
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return nil, err
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}
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parts = append(parts, subParts...)
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continue
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}
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pv, err := NewPartViewer(acct, conf, store, msg, part, curindex)
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if err != nil {
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return nil, err
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}
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parts = append(parts, pv)
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}
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return parts, nil
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}
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func createSwitcher(acct *AccountView, switcher *PartSwitcher, conf *config.AercConfig,
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store *lib.MessageStore, msg *models.MessageInfo) error {
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var err error
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switcher.selected = -1
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switcher.showHeaders = conf.Viewer.ShowHeaders
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switcher.alwaysShowMime = conf.Viewer.AlwaysShowMime
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if len(msg.BodyStructure.Parts) == 0 {
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switcher.selected = 0
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pv, err := NewPartViewer(acct, conf, store, msg, msg.BodyStructure, []int{1})
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if err != nil {
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return err
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}
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switcher.parts = []*PartViewer{pv}
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pv.OnInvalidate(func(_ ui.Drawable) {
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switcher.Invalidate()
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})
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} else {
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switcher.parts, err = enumerateParts(acct, conf, store,
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msg, msg.BodyStructure, []int{})
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if err != nil {
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return err
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}
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selectedPriority := -1
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fmt.Printf("Selecting best message from %v\n", conf.Viewer.Alternatives)
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for i, pv := range switcher.parts {
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pv.OnInvalidate(func(_ ui.Drawable) {
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switcher.Invalidate()
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})
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// Switch to user's preferred mimetype
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if switcher.selected == -1 && pv.part.MIMEType != "multipart" {
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switcher.selected = i
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}
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mime := strings.ToLower(pv.part.MIMEType) +
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"/" + strings.ToLower(pv.part.MIMESubType)
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for idx, m := range conf.Viewer.Alternatives {
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if m != mime {
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continue
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}
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priority := len(conf.Viewer.Alternatives) - idx
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if priority > selectedPriority {
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selectedPriority = priority
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switcher.selected = i
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}
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}
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}
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}
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return nil
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}
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func (mv *MessageViewer) Draw(ctx *ui.Context) {
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if mv.err != nil {
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ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
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ctx.Printf(0, 0, tcell.StyleDefault, "%s", mv.err.Error())
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return
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}
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mv.grid.Draw(ctx)
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}
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func (mv *MessageViewer) MouseEvent(localX int, localY int, event tcell.Event) {
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if mv.err != nil {
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return
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}
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mv.grid.MouseEvent(localX, localY, event)
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}
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func (mv *MessageViewer) Invalidate() {
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mv.grid.Invalidate()
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}
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func (mv *MessageViewer) OnInvalidate(fn func(d ui.Drawable)) {
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mv.grid.OnInvalidate(func(_ ui.Drawable) {
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fn(mv)
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})
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}
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func (mv *MessageViewer) Store() *lib.MessageStore {
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return mv.store
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}
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func (mv *MessageViewer) SelectedAccount() *AccountView {
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return mv.acct
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}
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func (mv *MessageViewer) SelectedMessage() (*models.MessageInfo, error) {
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if mv.msg == nil {
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return nil, errors.New("no message selected")
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}
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return mv.msg, nil
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}
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func (mv *MessageViewer) ToggleHeaders() {
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switcher := mv.switcher
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mv.conf.Viewer.ShowHeaders = !mv.conf.Viewer.ShowHeaders
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err := createSwitcher(
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mv.acct, switcher, mv.conf, mv.store, mv.msg)
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if err != nil {
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mv.acct.Logger().Printf(
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"warning: error during create switcher - %v", err)
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}
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switcher.Invalidate()
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}
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func (mv *MessageViewer) SelectedMessagePart() *PartInfo {
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switcher := mv.switcher
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part := switcher.parts[switcher.selected]
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return &PartInfo{
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Index: part.index,
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Msg: part.msg,
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Part: part.part,
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Store: part.store,
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}
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}
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func (mv *MessageViewer) PreviousPart() {
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switcher := mv.switcher
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for {
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switcher.selected--
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if switcher.selected < 0 {
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switcher.selected = len(switcher.parts) - 1
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}
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if switcher.parts[switcher.selected].part.MIMEType != "multipart" {
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break
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}
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}
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mv.Invalidate()
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}
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func (mv *MessageViewer) NextPart() {
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switcher := mv.switcher
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for {
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switcher.selected++
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if switcher.selected >= len(switcher.parts) {
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switcher.selected = 0
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}
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if switcher.parts[switcher.selected].part.MIMEType != "multipart" {
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break
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}
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}
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mv.Invalidate()
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}
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func (mv *MessageViewer) Close() {
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mv.switcher.Cleanup()
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}
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func (ps *PartSwitcher) Invalidate() {
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ps.DoInvalidate(ps)
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}
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func (ps *PartSwitcher) Focus(focus bool) {
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if ps.parts[ps.selected].term != nil {
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ps.parts[ps.selected].term.Focus(focus)
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}
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}
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func (ps *PartSwitcher) Event(event tcell.Event) bool {
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return ps.parts[ps.selected].Event(event)
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}
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func (ps *PartSwitcher) Draw(ctx *ui.Context) {
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height := len(ps.parts)
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if height == 1 && !ps.alwaysShowMime {
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ps.parts[ps.selected].Draw(ctx)
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return
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}
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// TODO: cap height and add scrolling for messages with many parts
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ps.height = ctx.Height()
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y := ctx.Height() - height
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for i, part := range ps.parts {
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style := tcell.StyleDefault.Reverse(ps.selected == i)
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ctx.Fill(0, y+i, ctx.Width(), 1, ' ', style)
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name := fmt.Sprintf("%s/%s",
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strings.ToLower(part.part.MIMEType),
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strings.ToLower(part.part.MIMESubType))
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if filename, ok := part.part.DispositionParams["filename"]; ok {
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name += fmt.Sprintf(" (%s)", filename)
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} else if filename, ok := part.part.Params["name"]; ok {
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// workaround golang not supporting RFC2231 besides ASCII and UTF8
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name += fmt.Sprintf(" (%s)", filename)
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}
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ctx.Printf(len(part.index)*2, y+i, style, "%s", name)
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}
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ps.parts[ps.selected].Draw(ctx.Subcontext(
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0, 0, ctx.Width(), ctx.Height()-height))
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}
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func (ps *PartSwitcher) MouseEvent(localX int, localY int, event tcell.Event) {
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switch event := event.(type) {
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case *tcell.EventMouse:
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switch event.Buttons() {
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case tcell.Button1:
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height := len(ps.parts)
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y := ps.height - height
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if localY < y && ps.parts[ps.selected].term != nil {
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ps.parts[ps.selected].term.MouseEvent(localX, localY, event)
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}
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for i, _ := range ps.parts {
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if localY != y+i {
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continue
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}
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if ps.parts[i].part.MIMEType == "multipart" {
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continue
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}
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if ps.parts[ps.selected].term != nil {
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ps.parts[ps.selected].term.Focus(false)
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}
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ps.selected = i
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ps.Invalidate()
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if ps.parts[ps.selected].term != nil {
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ps.parts[ps.selected].term.Focus(true)
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}
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}
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case tcell.WheelDown:
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height := len(ps.parts)
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y := ps.height - height
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if localY < y {
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ps.parts[ps.selected].term.MouseEvent(localX, localY, event)
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}
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if ps.parts[ps.selected].term != nil {
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ps.parts[ps.selected].term.Focus(false)
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}
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ps.mv.NextPart()
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if ps.parts[ps.selected].term != nil {
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ps.parts[ps.selected].term.Focus(true)
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}
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case tcell.WheelUp:
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height := len(ps.parts)
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y := ps.height - height
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if localY < y {
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ps.parts[ps.selected].term.MouseEvent(localX, localY, event)
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}
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if ps.parts[ps.selected].term != nil {
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ps.parts[ps.selected].term.Focus(false)
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}
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ps.mv.PreviousPart()
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if ps.parts[ps.selected].term != nil {
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ps.parts[ps.selected].term.Focus(true)
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}
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}
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}
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}
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func (ps *PartSwitcher) Cleanup() {
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for _, partViewer := range ps.parts {
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partViewer.Cleanup()
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}
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}
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func (mv *MessageViewer) Event(event tcell.Event) bool {
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return mv.switcher.Event(event)
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}
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func (mv *MessageViewer) Focus(focus bool) {
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mv.switcher.Focus(focus)
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}
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type PartViewer struct {
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ui.Invalidatable
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err error
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fetched bool
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filter *exec.Cmd
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index []int
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msg *models.MessageInfo
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pager *exec.Cmd
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pagerin io.WriteCloser
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part *models.BodyStructure
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showHeaders bool
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sink io.WriteCloser
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source io.Reader
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store *lib.MessageStore
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term *Terminal
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selecter *Selecter
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grid *ui.Grid
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}
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func NewPartViewer(acct *AccountView, conf *config.AercConfig,
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store *lib.MessageStore, msg *models.MessageInfo,
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part *models.BodyStructure,
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index []int) (*PartViewer, error) {
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var (
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filter *exec.Cmd
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pager *exec.Cmd
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pipe io.WriteCloser
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pagerin io.WriteCloser
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term *Terminal
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)
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cmd, err := shlex.Split(conf.Viewer.Pager)
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if err != nil {
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return nil, err
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}
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pager = exec.Command(cmd[0], cmd[1:]...)
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for _, f := range conf.Filters {
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mime := strings.ToLower(part.MIMEType) +
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"/" + strings.ToLower(part.MIMESubType)
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switch f.FilterType {
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case config.FILTER_MIMETYPE:
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if fnmatch.Match(f.Filter, mime, 0) {
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filter = exec.Command("sh", "-c", f.Command)
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}
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case config.FILTER_HEADER:
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var header string
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switch f.Header {
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case "subject":
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header = msg.Envelope.Subject
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case "from":
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header = models.FormatAddresses(msg.Envelope.From)
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case "to":
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header = models.FormatAddresses(msg.Envelope.To)
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case "cc":
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header = models.FormatAddresses(msg.Envelope.Cc)
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}
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if f.Regex.Match([]byte(header)) {
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filter = exec.Command("sh", "-c", f.Command)
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}
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}
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if filter != nil {
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break
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}
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}
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if filter != nil {
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if pipe, err = filter.StdinPipe(); err != nil {
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return nil, err
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}
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if pagerin, _ = pager.StdinPipe(); err != nil {
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return nil, err
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}
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if term, err = NewTerminal(pager); err != nil {
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return nil, err
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}
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}
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grid := ui.NewGrid().Rows([]ui.GridSpec{
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{ui.SIZE_EXACT, 3}, // Message
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{ui.SIZE_EXACT, 1}, // Selector
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{ui.SIZE_WEIGHT, 1},
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}).Columns([]ui.GridSpec{
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{ui.SIZE_WEIGHT, 1},
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})
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selecter := NewSelecter([]string{"Save message", "Pipe to command"}, 0).
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OnChoose(func(option string) {
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switch option {
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case "Save message":
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acct.aerc.BeginExCommand("save ")
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case "Pipe to command":
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acct.aerc.BeginExCommand("pipe ")
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}
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})
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grid.AddChild(selecter).At(2, 0)
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pv := &PartViewer{
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filter: filter,
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index: index,
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msg: msg,
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pager: pager,
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pagerin: pagerin,
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part: part,
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showHeaders: conf.Viewer.ShowHeaders,
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sink: pipe,
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store: store,
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term: term,
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selecter: selecter,
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grid: grid,
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}
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if term != nil {
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term.OnStart = func() {
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pv.attemptCopy()
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}
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term.OnInvalidate(func(_ ui.Drawable) {
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pv.Invalidate()
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})
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}
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return pv, nil
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}
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func (pv *PartViewer) SetSource(reader io.Reader) {
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pv.source = reader
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pv.attemptCopy()
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}
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func (pv *PartViewer) attemptCopy() {
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if pv.source != nil && pv.pager != nil && pv.pager.Process != nil {
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header := message.Header{}
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header.SetText("Content-Transfer-Encoding", pv.part.Encoding)
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header.SetContentType(fmt.Sprintf("%s/%s", pv.part.MIMEType, pv.part.MIMESubType), pv.part.Params)
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header.SetText("Content-Description", pv.part.Description)
|
|
if pv.filter != nil {
|
|
stdout, _ := pv.filter.StdoutPipe()
|
|
stderr, _ := pv.filter.StderrPipe()
|
|
pv.filter.Start()
|
|
ch := make(chan interface{})
|
|
go func() {
|
|
_, err := io.Copy(pv.pagerin, stdout)
|
|
if err != nil {
|
|
pv.err = err
|
|
pv.Invalidate()
|
|
}
|
|
stdout.Close()
|
|
ch <- nil
|
|
}()
|
|
go func() {
|
|
_, err := io.Copy(pv.pagerin, stderr)
|
|
if err != nil {
|
|
pv.err = err
|
|
pv.Invalidate()
|
|
}
|
|
stderr.Close()
|
|
ch <- nil
|
|
}()
|
|
go func() {
|
|
<-ch
|
|
<-ch
|
|
pv.filter.Wait()
|
|
pv.pagerin.Close()
|
|
}()
|
|
}
|
|
go func() {
|
|
if pv.showHeaders && pv.msg.RFC822Headers != nil {
|
|
fields := pv.msg.RFC822Headers.Fields()
|
|
for fields.Next() {
|
|
field := fmt.Sprintf(
|
|
"%s: %s\n", fields.Key(), fields.Value())
|
|
pv.sink.Write([]byte(field))
|
|
}
|
|
pv.sink.Write([]byte{'\n'})
|
|
}
|
|
|
|
entity, err := message.New(header, pv.source)
|
|
if err != nil {
|
|
pv.err = err
|
|
pv.Invalidate()
|
|
return
|
|
}
|
|
reader := mail.NewReader(entity)
|
|
part, err := reader.NextPart()
|
|
if err != nil {
|
|
pv.err = err
|
|
pv.Invalidate()
|
|
return
|
|
}
|
|
if pv.part.MIMEType == "text" {
|
|
scanner := bufio.NewScanner(part.Body)
|
|
for scanner.Scan() {
|
|
text := scanner.Text()
|
|
text = ansi.ReplaceAllString(text, "")
|
|
io.WriteString(pv.sink, text+"\n")
|
|
}
|
|
} else {
|
|
io.Copy(pv.sink, part.Body)
|
|
}
|
|
pv.sink.Close()
|
|
}()
|
|
}
|
|
}
|
|
|
|
func (pv *PartViewer) Invalidate() {
|
|
pv.DoInvalidate(pv)
|
|
}
|
|
|
|
func (pv *PartViewer) Draw(ctx *ui.Context) {
|
|
if pv.filter == nil {
|
|
// TODO: Let them download it directly or something
|
|
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
|
|
ctx.Printf(0, 0, tcell.StyleDefault.Foreground(tcell.ColorRed),
|
|
"No filter configured for this mimetype")
|
|
ctx.Printf(0, 2, tcell.StyleDefault,
|
|
"You can still :save the message or :pipe it to an external command")
|
|
pv.selecter.Focus(true)
|
|
pv.grid.Draw(ctx)
|
|
return
|
|
}
|
|
if !pv.fetched {
|
|
pv.store.FetchBodyPart(pv.msg.Uid, pv.index, pv.SetSource)
|
|
pv.fetched = true
|
|
}
|
|
if pv.err != nil {
|
|
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
|
|
ctx.Printf(0, 0, tcell.StyleDefault, "%s", pv.err.Error())
|
|
return
|
|
}
|
|
pv.term.Draw(ctx)
|
|
}
|
|
|
|
func (pv *PartViewer) Cleanup() {
|
|
if pv.pager != nil && pv.pager.Process != nil {
|
|
pv.pager.Process.Kill()
|
|
pv.pager = nil
|
|
}
|
|
}
|
|
|
|
func (pv *PartViewer) Event(event tcell.Event) bool {
|
|
if pv.term != nil {
|
|
return pv.term.Event(event)
|
|
}
|
|
return pv.selecter.Event(event)
|
|
}
|
|
|
|
type HeaderView struct {
|
|
ui.Invalidatable
|
|
Name string
|
|
Value string
|
|
}
|
|
|
|
func (hv *HeaderView) Draw(ctx *ui.Context) {
|
|
name := hv.Name
|
|
size := runewidth.StringWidth(name)
|
|
lim := ctx.Width() - size - 1
|
|
value := runewidth.Truncate(" "+hv.Value, lim, "…")
|
|
var (
|
|
hstyle tcell.Style
|
|
vstyle tcell.Style
|
|
)
|
|
// TODO: Make this more robust and less dumb
|
|
if hv.Name == "PGP" {
|
|
vstyle = tcell.StyleDefault.Foreground(tcell.ColorGreen)
|
|
hstyle = tcell.StyleDefault.Bold(true)
|
|
} else {
|
|
vstyle = tcell.StyleDefault
|
|
hstyle = tcell.StyleDefault.Bold(true)
|
|
}
|
|
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', vstyle)
|
|
ctx.Printf(0, 0, hstyle, name)
|
|
ctx.Printf(size, 0, vstyle, value)
|
|
}
|
|
|
|
func (hv *HeaderView) Invalidate() {
|
|
hv.DoInvalidate(hv)
|
|
}
|