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// Copyright (c) 2024, Přemysl Eric Janouch <p@janouch.name>
// SPDX-License-Identifier: 0BSD
package main
import (
"bufio"
"context"
"encoding/binary"
"flag"
"fmt"
"io"
"log"
"net"
"net/url"
"os"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/app"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/widget"
)
var (
debug = flag.Bool("debug", false, "enable debug output")
projectName = "xA"
projectVersion = "?"
addressConnect string
)
// -----------------------------------------------------------------------------
func relayReadFrame(r io.Reader) []byte {
var length uint32
if err := binary.Read(r, binary.BigEndian, &length); err != nil {
log.Println("Event receive failed: " + err.Error())
return nil
}
b := make([]byte, length)
if _, err := io.ReadFull(r, b); err != nil {
log.Println("Event receive failed: " + err.Error())
return nil
}
if *debug {
log.Printf("<? %v\n", b)
var m RelayEventMessage
if after, ok := m.ConsumeFrom(b); !ok {
log.Println("Event deserialization failed")
return nil
} else if len(after) != 0 {
log.Println("Event deserialization failed: trailing data")
return nil
}
j, err := m.MarshalJSON()
if err != nil {
log.Println("Event marshalling failed: " + err.Error())
return nil
}
log.Printf("<- %s\n", j)
}
return b
}
func relayMakeReceiver(ctx context.Context, conn net.Conn) <-chan []byte {
// The usual event message rarely gets above 1 kilobyte,
// thus this is set to buffer up at most 1 megabyte or so.
p := make(chan []byte, 1000)
r := bufio.NewReaderSize(conn, 65536)
go func() {
defer close(p)
for {
j := relayReadFrame(r)
if j == nil {
return
}
select {
case p <- j:
case <-ctx.Done():
return
}
}
}()
return p
}
func main() {
flag.Usage = func() {
fmt.Fprintf(flag.CommandLine.Output(),
"Usage: %s [OPTION...] CONNECT\n\n", os.Args[0])
flag.PrintDefaults()
}
flag.Parse()
if flag.NArg() < 1 || flag.NArg() > 1 {
flag.Usage()
os.Exit(1)
}
addressConnect = flag.Arg(0)
// TODO(p): First, test Fyne's GUI capabilities.
a := app.New()
w := a.NewWindow(projectName)
// TODO(p): There should also be a widget.NewLabel() next to the entry.
// - Probably another Border, even though this seems odd.
var (
richtext = widget.NewRichText()
richscroll = container.NewVScroll(richtext)
entry = widget.NewMultiLineEntry()
)
w.SetContent(container.NewBorder(nil, entry, nil, nil, richscroll))
testURL, _ := url.Parse("https://x.com")
richtext.Segments = []widget.RichTextSegment{
&widget.ParagraphSegment{Texts: []widget.RichTextSegment{
&widget.TextSegment{Text: "Test"},
&widget.HyperlinkSegment{Text: "X", URL: testURL},
&widget.TextSegment{
Text: " is a website, certainly",
Style: widget.RichTextStyleInline,
},
}},
&widget.TextSegment{Style: widget.RichTextStyleParagraph},
&widget.SeparatorSegment{},
&widget.TextSegment{Text: "Paragraph"},
}
richtext.Wrapping = fyne.TextWrapWord
richtext.Refresh()
w.ShowAndRun()
}
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