ref: 1b673b5ea7d06ef914e9d48ff7299f8b5f2119fd aerc/widgets/compose.go -rw-r--r-- 13.4 KiB View raw
                                                                                
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package widgets

import (
	"bufio"
	"io"
	"io/ioutil"
	"mime"
	"net/http"
	gomail "net/mail"
	"os"
	"os/exec"
	"path/filepath"
	"time"

	"github.com/emersion/go-message"
	"github.com/emersion/go-message/mail"
	"github.com/gdamore/tcell"
	"github.com/mattn/go-runewidth"
	"github.com/pkg/errors"

	"git.sr.ht/~sircmpwn/aerc/config"
	"git.sr.ht/~sircmpwn/aerc/lib/ui"
	"git.sr.ht/~sircmpwn/aerc/worker/types"
)

type Composer struct {
	headers struct {
		from    *headerEditor
		subject *headerEditor
		to      *headerEditor
	}

	acct   *config.AccountConfig
	config *config.AercConfig

	defaults    map[string]string
	editor      *Terminal
	email       *os.File
	attachments []string
	grid        *ui.Grid
	review      *reviewMessage
	worker      *types.Worker

	focusable []ui.DrawableInteractive
	focused   int
}

// TODO: Let caller configure headers, initial body (for replies), etc
func NewComposer(conf *config.AercConfig,
4 references
acct *config.AccountConfig, worker *types.Worker) *Composer { grid := ui.NewGrid().Rows([]ui.GridSpec{ {ui.SIZE_EXACT, 3}, {ui.SIZE_WEIGHT, 1}, }).Columns([]ui.GridSpec{ {ui.SIZE_WEIGHT, 1}, }) // TODO: let user specify extra headers to edit by default headers := ui.NewGrid().Rows([]ui.GridSpec{ {ui.SIZE_EXACT, 1}, // To/From {ui.SIZE_EXACT, 1}, // Subject {ui.SIZE_EXACT, 1}, // [spacer] }).Columns([]ui.GridSpec{ {ui.SIZE_WEIGHT, 1}, {ui.SIZE_WEIGHT, 1}, }) to := newHeaderEditor("To", "") from := newHeaderEditor("From", acct.From) subject := newHeaderEditor("Subject", "") headers.AddChild(to).At(0, 0) headers.AddChild(from).At(0, 1) headers.AddChild(subject).At(1, 0).Span(1, 2) headers.AddChild(ui.NewFill(' ')).At(2, 0).Span(1, 2) email, err := ioutil.TempFile("", "aerc-compose-*.eml") if err != nil { // TODO: handle this better return nil } grid.AddChild(headers).At(0, 0) c := &Composer{ acct: acct, config: conf, email: email, grid: grid, worker: worker, // You have to backtab to get to "From", since you usually don't edit it focused: 1, focusable: []ui.DrawableInteractive{from, to, subject}, } c.headers.to = to c.headers.from = from c.headers.subject = subject c.ShowTerminal() return c } // Sets additional headers to be added to the outgoing email (e.g. In-Reply-To) func (c *Composer) Defaults(defaults map[string]string) *Composer {
3 references
c.defaults = defaults if to, ok := defaults["To"]; ok { c.headers.to.input.Set(to) delete(defaults, "To") } if from, ok := defaults["From"]; ok { c.headers.from.input.Set(from) delete(defaults, "From") } if subject, ok := defaults["Subject"]; ok { c.headers.subject.input.Set(subject) delete(defaults, "Subject") } return c } // Note: this does not reload the editor. You must call this before the first // Draw() call. func (c *Composer) SetContents(reader io.Reader) *Composer {
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c.email.Seek(0, os.SEEK_SET) io.Copy(c.email, reader) c.email.Sync() c.email.Seek(0, os.SEEK_SET) return c } func (c *Composer) FocusTerminal() *Composer {
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if c.editor == nil { return c } c.focusable[c.focused].Focus(false) c.focused = 3 c.focusable[c.focused].Focus(true) return c } func (c *Composer) FocusSubject() *Composer {
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c.focusable[c.focused].Focus(false) c.focused = 2 c.focusable[c.focused].Focus(true) return c } func (c *Composer) OnSubjectChange(fn func(subject string)) {
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c.headers.subject.OnChange(func() { fn(c.headers.subject.input.String()) }) } func (c *Composer) Draw(ctx *ui.Context) { c.grid.Draw(ctx) } func (c *Composer) Invalidate() { c.grid.Invalidate() } func (c *Composer) OnInvalidate(fn func(d ui.Drawable)) { c.grid.OnInvalidate(func(_ ui.Drawable) { fn(c) }) } func (c *Composer) Close() {
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if c.email != nil { path := c.email.Name() c.email.Close() os.Remove(path) c.email = nil } if c.editor != nil { c.editor.Destroy() c.editor = nil } } func (c *Composer) Bindings() string {
1 reference
if c.editor == nil { return "compose::review" } else if c.editor == c.focusable[c.focused] { return "compose::editor" } else { return "compose" } } func (c *Composer) Event(event tcell.Event) bool { if c.editor != nil { return c.focusable[c.focused].Event(event) } return false } func (c *Composer) Focus(focus bool) { c.focusable[c.focused].Focus(focus) } func (c *Composer) Config() *config.AccountConfig {
1 reference
return c.acct } func (c *Composer) Worker() *types.Worker {
1 reference
return c.worker } func (c *Composer) PrepareHeader() (*mail.Header, []string, error) {
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// Extract headers from the email, if present c.email.Seek(0, os.SEEK_SET) var ( rcpts []string header mail.Header ) reader, err := mail.CreateReader(c.email) if err == nil { header = reader.Header defer reader.Close() } else { c.email.Seek(0, os.SEEK_SET) } // Update headers mhdr := (*message.Header)(&header.Header) mhdr.SetText("Message-Id", mail.GenerateMessageID()) if subject, _ := header.Subject(); subject == "" { header.SetSubject(c.headers.subject.input.String()) } if date, err := header.Date(); err != nil || date == (time.Time{}) { header.SetDate(time.Now()) } from := c.headers.from.input.String() from_addrs, err := gomail.ParseAddressList(from) if err != nil { return nil, nil, errors.Wrapf(err, "ParseAddressList(%s)", from) } else { var simon_from []*mail.Address for _, addr := range from_addrs { simon_from = append(simon_from, (*mail.Address)(addr)) } header.SetAddressList("From", simon_from) } // Merge in additional headers txthdr := mhdr.Header for key, value := range c.defaults { if !txthdr.Has(key) && value != "" { mhdr.SetText(key, value) } } if to := c.headers.to.input.String(); to != "" { // Dammit Simon, this branch is 3x as long as it ought to be because // your types aren't compatible enough with each other to_rcpts, err := gomail.ParseAddressList(to) if err != nil { return nil, nil, errors.Wrapf(err, "ParseAddressList(%s)", to) } ed_rcpts, err := header.AddressList("To") if err != nil { return nil, nil, errors.Wrap(err, "AddressList(To)") } for _, addr := range to_rcpts { ed_rcpts = append(ed_rcpts, (*mail.Address)(addr)) } header.SetAddressList("To", ed_rcpts) for _, addr := range ed_rcpts { rcpts = append(rcpts, addr.Address) } } if cc, _ := mhdr.Text("Cc"); cc != "" { cc_rcpts, err := gomail.ParseAddressList(cc) if err != nil { return nil, nil, errors.Wrapf(err, "ParseAddressList(%s)", cc) } // TODO: Update when the user inputs Cc's through the UI for _, addr := range cc_rcpts { rcpts = append(rcpts, addr.Address) } } if bcc, _ := mhdr.Text("Bcc"); bcc != "" { bcc_rcpts, err := gomail.ParseAddressList(bcc) if err != nil { return nil, nil, errors.Wrapf(err, "ParseAddressList(%s)", bcc) } // TODO: Update when the user inputs Bcc's through the UI for _, addr := range bcc_rcpts { rcpts = append(rcpts, addr.Address) } } return &header, rcpts, nil } func (c *Composer) WriteMessage(header *mail.Header, writer io.Writer) error {
2 references
name := c.email.Name() c.email.Close() file, err := os.Open(name) if err != nil { return errors.Wrap(err, "FileOpen") } c.email = file var body io.Reader reader, err := mail.CreateReader(c.email) if err == nil { // TODO: Do we want to let users write a full blown multipart email // into the editor? If so this needs to change part, err := reader.NextPart() if err != nil { return errors.Wrap(err, "reader.NextPart") } body = part.Body defer reader.Close() } else { c.email.Seek(0, os.SEEK_SET) body = c.email } if len(c.attachments) == 0 { // don't create a multipart email if we only have text header.SetContentType("text/plain", map[string]string{"charset": "UTF-8"}) w, err := mail.CreateSingleInlineWriter(writer, *header) if err != nil { return errors.Wrap(err, "CreateSingleInlineWriter") } defer w.Close() return writeBody(body, w) } // otherwise create a multipart email, // with a multipart/alternative part for the text w, err := mail.CreateWriter(writer, *header) if err != nil { return errors.Wrap(err, "CreateWriter") } defer w.Close() bh := mail.InlineHeader{} bh.SetContentType("text/plain", map[string]string{"charset": "UTF-8"}) bi, err := w.CreateInline() if err != nil { return errors.Wrap(err, "CreateInline") } defer bi.Close() bw, err := bi.CreatePart(bh) if err != nil { return errors.Wrap(err, "CreatePart") } defer bw.Close() if err := writeBody(body, bw); err != nil { return err } for _, a := range c.attachments { writeAttachment(a, w) } return nil } func writeBody(body io.Reader, w io.Writer) error {
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if _, err := io.Copy(w, body); err != nil { return errors.Wrap(err, "io.Copy") } return nil } // write the attachment specified by path to the message func writeAttachment(path string, writer *mail.Writer) error {
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filename := filepath.Base(path) f, err := os.Open(path) if err != nil { return errors.Wrap(err, "os.Open") } defer f.Close() reader := bufio.NewReader(f) // determine the MIME type // http.DetectContentType only cares about the first 512 bytes head, err := reader.Peek(512) if err != nil { return errors.Wrap(err, "Peek") } mimeString := http.DetectContentType(head) // mimeString can contain type and params (like text encoding), // so we need to break them apart before passing them to the headers mimeType, params, err := mime.ParseMediaType(mimeString) if err != nil { return errors.Wrap(err, "ParseMediaType") } params["name"] = filename // set header fields ah := mail.AttachmentHeader{} ah.SetContentType(mimeType, params) // setting the filename auto sets the content disposition ah.SetFilename(filename) aw, err := writer.CreateAttachment(ah) if err != nil { return errors.Wrap(err, "CreateAttachment") } defer aw.Close() if _, err := reader.WriteTo(aw); err != nil { return errors.Wrap(err, "reader.WriteTo") } return nil } func (c *Composer) AddAttachment(path string) {
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c.attachments = append(c.attachments, path) if c.review != nil { c.grid.RemoveChild(c.review) c.review = newReviewMessage(c, nil) c.grid.AddChild(c.review).At(1, 0) } } func (c *Composer) termClosed(err error) {
1 reference
c.grid.RemoveChild(c.editor) c.review = newReviewMessage(c, err) c.grid.AddChild(c.review).At(1, 0) c.editor.Destroy() c.editor = nil c.focusable = c.focusable[:len(c.focusable)-1] if c.focused >= len(c.focusable) { c.focused = len(c.focusable) - 1 } } func (c *Composer) ShowTerminal() {
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if c.editor != nil { return } if c.review != nil { c.grid.RemoveChild(c.review) } editorName := c.config.Compose.Editor if editorName == "" { editorName = os.Getenv("EDITOR") } if editorName == "" { editorName = "vi" } editor := exec.Command("/bin/sh", "-c", editorName+" "+c.email.Name()) c.editor, _ = NewTerminal(editor) // TODO: handle error c.editor.OnClose = c.termClosed c.grid.AddChild(c.editor).At(1, 0) c.focusable = append(c.focusable, c.editor) } func (c *Composer) PrevField() {
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c.focusable[c.focused].Focus(false) c.focused-- if c.focused == -1 { c.focused = len(c.focusable) - 1 } c.focusable[c.focused].Focus(true) } func (c *Composer) NextField() {
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c.focusable[c.focused].Focus(false) c.focused = (c.focused + 1) % len(c.focusable) c.focusable[c.focused].Focus(true) } type headerEditor struct { name string input *ui.TextInput } func newHeaderEditor(name string, value string) *headerEditor {
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return &headerEditor{ input: ui.NewTextInput(value), name: name, } } func (he *headerEditor) Draw(ctx *ui.Context) { name := he.name + " " size := runewidth.StringWidth(name) ctx.Fill(0, 0, size, ctx.Height(), ' ', tcell.StyleDefault) ctx.Printf(0, 0, tcell.StyleDefault.Bold(true), "%s", name) he.input.Draw(ctx.Subcontext(size, 0, ctx.Width()-size, 1)) } func (he *headerEditor) Invalidate() { he.input.Invalidate() } func (he *headerEditor) OnInvalidate(fn func(ui.Drawable)) { he.input.OnInvalidate(func(_ ui.Drawable) { fn(he) }) } func (he *headerEditor) Focus(focused bool) { he.input.Focus(focused) } func (he *headerEditor) Event(event tcell.Event) bool { return he.input.Event(event) } func (he *headerEditor) OnChange(fn func()) {
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he.input.OnChange(func(_ *ui.TextInput) { fn() }) } type reviewMessage struct { composer *Composer grid *ui.Grid } func newReviewMessage(composer *Composer, err error) *reviewMessage {
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spec := []ui.GridSpec{{ui.SIZE_EXACT, 2}, {ui.SIZE_EXACT, 1}} for range composer.attachments { spec = append(spec, ui.GridSpec{ui.SIZE_EXACT, 1}) } // make the last element fill remaining space spec = append(spec, ui.GridSpec{ui.SIZE_WEIGHT, 1}) grid := ui.NewGrid().Rows(spec).Columns([]ui.GridSpec{ {ui.SIZE_WEIGHT, 1}, }) if err != nil { grid.AddChild(ui.NewText(err.Error()). Color(tcell.ColorRed, tcell.ColorDefault)) grid.AddChild(ui.NewText("Press [q] to close this tab.")).At(1, 0) } else { // TODO: source this from actual keybindings? grid.AddChild(ui.NewText( "Send this email? [y]es/[n]o/[e]dit/[a]ttach")).At(0, 0) grid.AddChild(ui.NewText("Attachments:"). Reverse(true)).At(1, 0) if len(composer.attachments) == 0 { grid.AddChild(ui.NewText("(none)")).At(2, 0) } else { for i, a := range composer.attachments { grid.AddChild(ui.NewText(a)).At(i+2, 0) } } } return &reviewMessage{ composer: composer, grid: grid, } } func (rm *reviewMessage) Invalidate() { rm.grid.Invalidate() } func (rm *reviewMessage) OnInvalidate(fn func(ui.Drawable)) { rm.grid.OnInvalidate(func(_ ui.Drawable) { fn(rm) }) } func (rm *reviewMessage) Draw(ctx *ui.Context) { rm.grid.Draw(ctx) }