Split into category packages; module github.com/ZacharyZhang-NY/MujicaUI

messaging/mail_reader.go

@@ -0,0 +1,138 @@
+package messaging
+
+import (
+	"log/slog"
+	"strings"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+
+	"github.com/ZacharyZhang-NY/MujicaUI/chat"
+	"github.com/ZacharyZhang-NY/MujicaUI/core"
+	"github.com/ZacharyZhang-NY/MujicaUI/display"
+	"github.com/ZacharyZhang-NY/MujicaUI/theme"
+)
+
+// MailFormat selects plain text or safe Markdown.
+type MailFormat int
+
+const (
+	MailPlain MailFormat = iota
+	// MailMarkdown uses MarkdownView’s safe subset.
+	MailMarkdown
+)
+
+// MailAttachment is a file sent with a mail.
+type MailAttachment struct {
+	Name string
+	Size int64
+	Type string
+}
+
+// Mail supplies headers, body and attachments.
+type Mail struct {
+	From        string
+	To, Cc      []string
+	Subject     string
+	Date        time.Time
+	Body        string
+	Format      MailFormat
+	Attachments []MailAttachment
+}
+
+// MailReaderResult is a MailReader's element and this frame's events.
+type MailReaderResult struct {
+	Element *ui.Element
+	// Link contains the activated URL, or an empty string.
+	Link string
+	// Opened and Downloaded are attachment indexes, -1 for none.
+	Opened, Downloaded int
+}
+
+type mailQuotesKey struct{}
+
+// MailReader displays headers, body, folded quotes and attachments.
+func MailReader(c *ui.Context, m Mail) MailReaderResult {
+	if m.From == "" || m.Subject == "" {
+		panic("mujica: MailReader needs From and Subject")
+	}
+	if m.Format != MailPlain && m.Format != MailMarkdown {
+		panic("mujica: unknown MailFormat")
+	}
+	k := core.Tokens(c)
+	u := core.Density(c).Unit()
+	r := MailReaderResult{Opened: -1, Downloaded: -1}
+	col := ui.Column(c).Gap(u * 4).MinWidth(0).Role(ui.RoleGroup).Label(m.Subject)
+	r.Element = col
+	small := core.FontSize(c, theme.CaptionSize)
+	col.Children(func() {
+		ui.Text(c, m.Subject).Font(theme.SerifFont).FontSize(core.FontSize(c, theme.H2Size)).FontWeight(600)
+		ui.Row(c).Gap(u * 3).AlignItems(ui.Start).Children(func() {
+			display.Avatar(c, m.From, display.AvatarOptions{Size: 36})
+			ui.Column(c).Gap(2).Grow(1).MinWidth(0).Children(func() {
+				ui.Text(c, m.From).FontWeight(600).Selectable().FocusRing(false)
+				for _, line := range [][2]string{{"mail_reader.to", strings.Join(m.To, ", ")}, {"mail_reader.cc", strings.Join(m.Cc, ", ")}} {
+					if line[1] != "" {
+						ui.Text(c, core.Msg(c, line[0])+" "+line[1]).FontSize(small).TextColor(k.TextMuted).Selectable().FocusRing(false)
+					}
+				}
+			})
+			if !m.Date.IsZero() {
+				ui.Text(c, core.MessagingDate(c, m.Date, "mail_reader.date")).FontSize(small).TextColor(k.TextMuted).FontFeatures("tnum").SingleLine()
+			}
+		})
+		ui.Box(c).Height(1).Background(k.Border)
+		if m.Format == MailMarkdown {
+			if url, ok := chat.MarkdownView(c, m.Body).Link(); ok {
+				r.Link = url
+			}
+		} else {
+			mailPlainBody(c, ui.Local(col, mailQuotesKey{}, func() map[string]bool { return map[string]bool{} }), m.Body)
+		}
+		if len(m.Attachments) > 0 {
+			ui.Text(c, core.Msg(c, "mail_reader.attachments")).FontSize(small).FontWeight(600).TextColor(k.TextMuted)
+			ui.Row(c).Gap(u * 2).Wrap().Children(func() {
+				for i, a := range m.Attachments {
+					f := chat.FileMessage(c, chat.FileMessageOptions(a))
+					f.Element.Key(i)
+					if f.Opened() {
+						r.Opened = i
+					}
+					if f.Downloaded() {
+						r.Downloaded = i
+					}
+				}
+			})
+		}
+	})
+	if r.Link != "" || r.Opened >= 0 || r.Downloaded >= 0 {
+		slog.Debug("mujica: mail_reader action", "opened", r.Opened, "downloaded", r.Downloaded)
+	}
+	return r
+}
+
+// mailPlainBody shows plain text, folding each run of quoted lines.
+func mailPlainBody(c *ui.Context, open *map[string]bool, body string) {
+	lines := strings.Split(body, "\n")
+	ui.Column(c).Gap(core.Density(c).Unit() * 2).MinWidth(0).Children(func() {
+		for i := 0; i < len(lines); {
+			j := i
+			quoted := strings.HasPrefix(lines[i], ">")
+			for j < len(lines) && strings.HasPrefix(lines[j], ">") == quoted {
+				j++
+			}
+			chunk := strings.Join(lines[i:j], "\n")
+			ui.Box(c).Key(i).Children(func() {
+				if quoted {
+					// Fold state is kept per quote text.
+					o := (*open)[chunk]
+					QuotedText(c, chunk, &o)
+					(*open)[chunk] = o
+				} else if strings.TrimSpace(chunk) != "" {
+					ui.Text(c, strings.Trim(chunk, "\n")).Selectable().FocusRing(false).LineHeight(theme.LineHeight)
+				}
+			})
+			i = j
+		}
+	})
+}