chore: internal clipboard package

7 files changed, 1275 insertions, 2 deletions

diff --git a/packages/tui/internal/app/app.go b/packages/tui/internal/app/app.go
index 83934343e..a70b3ca64 100644
--- a/packages/tui/internal/app/app.go
+++ b/packages/tui/internal/app/app.go
@@ -12,13 +12,13 @@ import (
 
 	tea "github.com/charmbracelet/bubbletea/v2"
 	"github.com/sst/opencode-sdk-go"
+	"github.com/sst/opencode/internal/clipboard"
 	"github.com/sst/opencode/internal/commands"
 	"github.com/sst/opencode/internal/components/toast"
 	"github.com/sst/opencode/internal/config"
 	"github.com/sst/opencode/internal/styles"
 	"github.com/sst/opencode/internal/theme"
 	"github.com/sst/opencode/internal/util"
-	"golang.design/x/clipboard"
 )
 
 type App struct {
diff --git a/packages/tui/internal/clipboard/clipboard.go b/packages/tui/internal/clipboard/clipboard.go
new file mode 100644
index 000000000..70e05bd29
--- /dev/null
+++ b/packages/tui/internal/clipboard/clipboard.go
@@ -0,0 +1,155 @@
+// Copyright 2021 The golang.design Initiative Authors.
+// All rights reserved. Use of this source code is governed
+// by a MIT license that can be found in the LICENSE file.
+//
+// Written by Changkun Ou <changkun.de>
+
+/*
+Package clipboard provides cross platform clipboard access and supports
+macOS/Linux/Windows/Android/iOS platform. Before interacting with the
+clipboard, one must call Init to assert if it is possible to use this
+package:
+
+	err := clipboard.Init()
+	if err != nil {
+		panic(err)
+	}
+
+The most common operations are `Read` and `Write`. To use them:
+
+	// write/read text format data of the clipboard, and
+	// the byte buffer regarding the text are UTF8 encoded.
+	clipboard.Write(clipboard.FmtText, []byte("text data"))
+	clipboard.Read(clipboard.FmtText)
+
+	// write/read image format data of the clipboard, and
+	// the byte buffer regarding the image are PNG encoded.
+	clipboard.Write(clipboard.FmtImage, []byte("image data"))
+	clipboard.Read(clipboard.FmtImage)
+
+Note that read/write regarding image format assumes that the bytes are
+PNG encoded since it serves the alpha blending purpose that might be
+used in other graphical software.
+
+In addition, `clipboard.Write` returns a channel that can receive an
+empty struct as a signal, which indicates the corresponding write call
+to the clipboard is outdated, meaning the clipboard has been overwritten
+by others and the previously written data is lost. For instance:
+
+	changed := clipboard.Write(clipboard.FmtText, []byte("text data"))
+
+	select {
+	case <-changed:
+		println(`"text data" is no longer available from clipboard.`)
+	}
+
+You can ignore the returning channel if you don't need this type of
+notification. Furthermore, when you need more than just knowing whether
+clipboard data is changed, use the watcher API:
+
+	ch := clipboard.Watch(context.TODO(), clipboard.FmtText)
+	for data := range ch {
+		// print out clipboard data whenever it is changed
+		println(string(data))
+	}
+*/
+package clipboard
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"sync"
+)
+
+var (
+	// activate only for running tests.
+	debug          = false
+	errUnavailable = errors.New("clipboard unavailable")
+	errUnsupported = errors.New("unsupported format")
+	errNoCgo       = errors.New("clipboard: cannot use when CGO_ENABLED=0")
+)
+
+// Format represents the format of clipboard data.
+type Format int
+
+// All sorts of supported clipboard data
+const (
+	// FmtText indicates plain text clipboard format
+	FmtText Format = iota
+	// FmtImage indicates image/png clipboard format
+	FmtImage
+)
+
+var (
+	// Due to the limitation on operating systems (such as darwin),
+	// concurrent read can even cause panic, use a global lock to
+	// guarantee one read at a time.
+	lock      = sync.Mutex{}
+	initOnce  sync.Once
+	initError error
+)
+
+// Init initializes the clipboard package. It returns an error
+// if the clipboard is not available to use. This may happen if the
+// target system lacks required dependency, such as libx11-dev in X11
+// environment. For example,
+//
+//	err := clipboard.Init()
+//	if err != nil {
+//		panic(err)
+//	}
+//
+// If Init returns an error, any subsequent Read/Write/Watch call
+// may result in an unrecoverable panic.
+func Init() error {
+	initOnce.Do(func() {
+		initError = initialize()
+	})
+	return initError
+}
+
+// Read returns a chunk of bytes of the clipboard data if it presents
+// in the desired format t presents. Otherwise, it returns nil.
+func Read(t Format) []byte {
+	lock.Lock()
+	defer lock.Unlock()
+
+	buf, err := read(t)
+	if err != nil {
+		if debug {
+			fmt.Fprintf(os.Stderr, "read clipboard err: %v\n", err)
+		}
+		return nil
+	}
+	return buf
+}
+
+// Write writes a given buffer to the clipboard in a specified format.
+// Write returned a receive-only channel can receive an empty struct
+// as a signal, which indicates the clipboard has been overwritten from
+// this write.
+// If format t indicates an image, then the given buf assumes
+// the image data is PNG encoded.
+func Write(t Format, buf []byte) <-chan struct{} {
+	lock.Lock()
+	defer lock.Unlock()
+
+	changed, err := write(t, buf)
+	if err != nil {
+		if debug {
+			fmt.Fprintf(os.Stderr, "write to clipboard err: %v\n", err)
+		}
+		return nil
+	}
+	return changed
+}
+
+// Watch returns a receive-only channel that received the clipboard data
+// whenever any change of clipboard data in the desired format happens.
+//
+// The returned channel will be closed if the given context is canceled.
+func Watch(ctx context.Context, t Format) <-chan []byte {
+	return watch(ctx, t)
+}
diff --git a/packages/tui/internal/clipboard/clipboard_darwin.go b/packages/tui/internal/clipboard/clipboard_darwin.go
new file mode 100644
index 000000000..ead6811f1
--- /dev/null
+++ b/packages/tui/internal/clipboard/clipboard_darwin.go
@@ -0,0 +1,266 @@
+// Copyright 2021 The golang.design Initiative Authors.
+// All rights reserved. Use of this source code is governed
+// by a MIT license that can be found in the LICENSE file.
+//
+// Written by Changkun Ou <changkun.de>
+
+//go:build darwin
+
+package clipboard
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+var (
+	lastChangeCount int64
+	changeCountMu   sync.Mutex
+)
+
+func initialize() error { return nil }
+
+func read(t Format) (buf []byte, err error) {
+	switch t {
+	case FmtText:
+		return readText()
+	case FmtImage:
+		return readImage()
+	default:
+		return nil, errUnsupported
+	}
+}
+
+func readText() ([]byte, error) {
+	// Check if clipboard contains string data
+	checkScript := `
+	try
+		set clipboardTypes to (clipboard info)
+		repeat with aType in clipboardTypes
+			if (first item of aType) is string then
+				return "hastext"
+			end if
+		end repeat
+		return "notext"
+	on error
+		return "error"
+	end try
+	`
+
+	cmd := exec.Command("osascript", "-e", checkScript)
+	checkOut, err := cmd.Output()
+	if err != nil {
+		return nil, errUnavailable
+	}
+
+	checkOut = bytes.TrimSpace(checkOut)
+	if !bytes.Equal(checkOut, []byte("hastext")) {
+		return nil, errUnavailable
+	}
+
+	// Now get the actual text
+	cmd = exec.Command("osascript", "-e", "get the clipboard")
+	out, err := cmd.Output()
+	if err != nil {
+		return nil, errUnavailable
+	}
+	// Remove trailing newline that osascript adds
+	out = bytes.TrimSuffix(out, []byte("\n"))
+
+	// If clipboard was set to empty string, return nil
+	if len(out) == 0 {
+		return nil, nil
+	}
+	return out, nil
+}
+func readImage() ([]byte, error) {
+	// AppleScript to read image data from clipboard as base64
+	script := `
+	try
+		set theData to the clipboard as «class PNGf»
+		return theData
+	on error
+		return ""
+	end try
+	`
+
+	cmd := exec.Command("osascript", "-e", script)
+	out, err := cmd.Output()
+	if err != nil {
+		return nil, errUnavailable
+	}
+
+	// Check if we got any data
+	out = bytes.TrimSpace(out)
+	if len(out) == 0 {
+		return nil, errUnavailable
+	}
+
+	// The output is in hex format (e.g., «data PNGf89504E...»)
+	// We need to extract and convert it
+	outStr := string(out)
+	if !strings.HasPrefix(outStr, "«data PNGf") || !strings.HasSuffix(outStr, "»") {
+		return nil, errUnavailable
+	}
+
+	// Extract hex data
+	hexData := strings.TrimPrefix(outStr, "«data PNGf")
+	hexData = strings.TrimSuffix(hexData, "»")
+
+	// Convert hex to bytes
+	buf := make([]byte, len(hexData)/2)
+	for i := 0; i < len(hexData); i += 2 {
+		b, err := strconv.ParseUint(hexData[i:i+2], 16, 8)
+		if err != nil {
+			return nil, errUnavailable
+		}
+		buf[i/2] = byte(b)
+	}
+
+	return buf, nil
+}
+
+// write writes the given data to clipboard and
+// returns true if success or false if failed.
+func write(t Format, buf []byte) (<-chan struct{}, error) {
+	var err error
+	switch t {
+	case FmtText:
+		err = writeText(buf)
+	case FmtImage:
+		err = writeImage(buf)
+	default:
+		return nil, errUnsupported
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	// Update change count
+	changeCountMu.Lock()
+	lastChangeCount++
+	currentCount := lastChangeCount
+	changeCountMu.Unlock()
+
+	// use unbuffered channel to prevent goroutine leak
+	changed := make(chan struct{}, 1)
+	go func() {
+		for {
+			time.Sleep(time.Second)
+			changeCountMu.Lock()
+			if lastChangeCount != currentCount {
+				changeCountMu.Unlock()
+				changed <- struct{}{}
+				close(changed)
+				return
+			}
+			changeCountMu.Unlock()
+		}
+	}()
+	return changed, nil
+}
+
+func writeText(buf []byte) error {
+	if len(buf) == 0 {
+		// Clear clipboard
+		script := `set the clipboard to ""`
+		cmd := exec.Command("osascript", "-e", script)
+		if err := cmd.Run(); err != nil {
+			return errUnavailable
+		}
+		return nil
+	}
+
+	// Escape the text for AppleScript
+	text := string(buf)
+	text = strings.ReplaceAll(text, "\\", "\\\\")
+	text = strings.ReplaceAll(text, "\"", "\\\"")
+
+	script := fmt.Sprintf(`set the clipboard to "%s"`, text)
+	cmd := exec.Command("osascript", "-e", script)
+	if err := cmd.Run(); err != nil {
+		return errUnavailable
+	}
+	return nil
+}
+func writeImage(buf []byte) error {
+	if len(buf) == 0 {
+		// Clear clipboard
+		script := `set the clipboard to ""`
+		cmd := exec.Command("osascript", "-e", script)
+		if err := cmd.Run(); err != nil {
+			return errUnavailable
+		}
+		return nil
+	}
+
+	// Create a temporary file to store the PNG data
+	tmpFile, err := os.CreateTemp("", "clipboard*.png")
+	if err != nil {
+		return errUnavailable
+	}
+	defer os.Remove(tmpFile.Name())
+
+	if _, err := tmpFile.Write(buf); err != nil {
+		tmpFile.Close()
+		return errUnavailable
+	}
+	tmpFile.Close()
+
+	// Use osascript to set clipboard to the image file
+	script := fmt.Sprintf(`
+	set theFile to POSIX file "%s"
+	set theImage to read theFile as «class PNGf»
+	set the clipboard to theImage
+	`, tmpFile.Name())
+
+	cmd := exec.Command("osascript", "-e", script)
+	if err := cmd.Run(); err != nil {
+		return errUnavailable
+	}
+	return nil
+}
+func watch(ctx context.Context, t Format) <-chan []byte {
+	recv := make(chan []byte, 1)
+	ti := time.NewTicker(time.Second)
+
+	// Get initial clipboard content
+	var lastContent []byte
+	if b := Read(t); b != nil {
+		lastContent = make([]byte, len(b))
+		copy(lastContent, b)
+	}
+
+	go func() {
+		defer close(recv)
+		defer ti.Stop()
+
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-ti.C:
+				b := Read(t)
+				if b == nil {
+					continue
+				}
+
+				// Check if content changed
+				if !bytes.Equal(lastContent, b) {
+					recv <- b
+					lastContent = make([]byte, len(b))
+					copy(lastContent, b)
+				}
+			}
+		}
+	}()
+	return recv
+}
diff --git a/packages/tui/internal/clipboard/clipboard_linux.go b/packages/tui/internal/clipboard/clipboard_linux.go
new file mode 100644
index 000000000..ca8a3bc6a
--- /dev/null
+++ b/packages/tui/internal/clipboard/clipboard_linux.go
@@ -0,0 +1,276 @@
+// Copyright 2021 The golang.design Initiative Authors.
+// All rights reserved. Use of this source code is governed
+// by a MIT license that can be found in the LICENSE file.
+//
+// Written by Changkun Ou <changkun.de>
+
+//go:build linux
+
+package clipboard
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"os/exec"
+	"strings"
+	"sync"
+	"time"
+)
+
+var (
+	// Clipboard tools in order of preference
+	clipboardTools = []struct {
+		name      string
+		readCmd   []string
+		writeCmd  []string
+		readImg   []string
+		writeImg  []string
+		available bool
+	}{
+		{
+			name:     "xclip",
+			readCmd:  []string{"xclip", "-selection", "clipboard", "-o"},
+			writeCmd: []string{"xclip", "-selection", "clipboard"},
+			readImg:  []string{"xclip", "-selection", "clipboard", "-t", "image/png", "-o"},
+			writeImg: []string{"xclip", "-selection", "clipboard", "-t", "image/png"},
+		},
+		{
+			name:     "xsel",
+			readCmd:  []string{"xsel", "--clipboard", "--output"},
+			writeCmd: []string{"xsel", "--clipboard", "--input"},
+			readImg:  []string{"xsel", "--clipboard", "--output"},
+			writeImg: []string{"xsel", "--clipboard", "--input"},
+		},
+		{
+			name:     "wl-clipboard",
+			readCmd:  []string{"wl-paste", "-n"},
+			writeCmd: []string{"wl-copy"},
+			readImg:  []string{"wl-paste", "-t", "image/png", "-n"},
+			writeImg: []string{"wl-copy", "-t", "image/png"},
+		},
+	}
+
+	selectedTool   int = -1
+	toolMutex      sync.Mutex
+	lastChangeTime time.Time
+	changeTimeMu   sync.Mutex
+)
+
+func initialize() error {
+	toolMutex.Lock()
+	defer toolMutex.Unlock()
+
+	if selectedTool >= 0 {
+		return nil // Already initialized
+	}
+
+	// Check which clipboard tool is available
+	for i, tool := range clipboardTools {
+		cmd := exec.Command("which", tool.name)
+		if err := cmd.Run(); err == nil {
+			clipboardTools[i].available = true
+			if selectedTool < 0 {
+				selectedTool = i
+			}
+		}
+	}
+
+	if selectedTool < 0 {
+		return fmt.Errorf(`%w: No clipboard utility found. Install one of the following:
+
+For X11 systems:
+	apt install -y xclip
+	# or
+	apt install -y xsel
+
+For Wayland systems:
+	apt install -y wl-clipboard
+
+If running in a headless environment, you may also need:
+	apt install -y xvfb
+	# and run:
+	Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
+	export DISPLAY=:99.0`, errUnavailable)
+	}
+
+	return nil
+}
+
+func read(t Format) (buf []byte, err error) {
+	toolMutex.Lock()
+	tool := clipboardTools[selectedTool]
+	toolMutex.Unlock()
+
+	switch t {
+	case FmtText:
+		return readText(tool)
+	case FmtImage:
+		return readImage(tool)
+	default:
+		return nil, errUnsupported
+	}
+}
+
+func readText(tool struct {
+	name      string
+	readCmd   []string
+	writeCmd  []string
+	readImg   []string
+	writeImg  []string
+	available bool
+}) ([]byte, error) {
+	// First check if clipboard contains text
+	cmd := exec.Command(tool.readCmd[0], tool.readCmd[1:]...)
+	out, err := cmd.Output()
+	if err != nil {
+		// Check if it's because clipboard contains non-text data
+		if tool.name == "xclip" {
+			// xclip returns error when clipboard doesn't contain requested type
+			checkCmd := exec.Command("xclip", "-selection", "clipboard", "-t", "TARGETS", "-o")
+			targets, _ := checkCmd.Output()
+			if bytes.Contains(targets, []byte("image/png")) && !bytes.Contains(targets, []byte("UTF8_STRING")) {
+				return nil, errUnavailable
+			}
+		}
+		return nil, errUnavailable
+	}
+
+	return out, nil
+}
+
+func readImage(tool struct {
+	name      string
+	readCmd   []string
+	writeCmd  []string
+	readImg   []string
+	writeImg  []string
+	available bool
+}) ([]byte, error) {
+	if tool.name == "xsel" {
+		// xsel doesn't support image types well, return error
+		return nil, errUnavailable
+	}
+
+	cmd := exec.Command(tool.readImg[0], tool.readImg[1:]...)
+	out, err := cmd.Output()
+	if err != nil {
+		return nil, errUnavailable
+	}
+
+	// Verify it's PNG data
+	if len(out) < 8 || !bytes.Equal(out[:8], []byte{0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A}) {
+		return nil, errUnavailable
+	}
+
+	return out, nil
+}
+
+func write(t Format, buf []byte) (<-chan struct{}, error) {
+	toolMutex.Lock()
+	tool := clipboardTools[selectedTool]
+	toolMutex.Unlock()
+
+	var cmd *exec.Cmd
+	switch t {
+	case FmtText:
+		if len(buf) == 0 {
+			// Write empty string
+			cmd = exec.Command(tool.writeCmd[0], tool.writeCmd[1:]...)
+			cmd.Stdin = bytes.NewReader([]byte{})
+		} else {
+			cmd = exec.Command(tool.writeCmd[0], tool.writeCmd[1:]...)
+			cmd.Stdin = bytes.NewReader(buf)
+		}
+	case FmtImage:
+		if tool.name == "xsel" {
+			// xsel doesn't support image types well
+			return nil, errUnavailable
+		}
+		if len(buf) == 0 {
+			// Clear clipboard
+			cmd = exec.Command(tool.writeCmd[0], tool.writeCmd[1:]...)
+			cmd.Stdin = bytes.NewReader([]byte{})
+		} else {
+			cmd = exec.Command(tool.writeImg[0], tool.writeImg[1:]...)
+			cmd.Stdin = bytes.NewReader(buf)
+		}
+	default:
+		return nil, errUnsupported
+	}
+
+	if err := cmd.Run(); err != nil {
+		return nil, errUnavailable
+	}
+
+	// Update change time
+	changeTimeMu.Lock()
+	lastChangeTime = time.Now()
+	currentTime := lastChangeTime
+	changeTimeMu.Unlock()
+
+	// Create change notification channel
+	changed := make(chan struct{}, 1)
+	go func() {
+		for {
+			time.Sleep(time.Second)
+			changeTimeMu.Lock()
+			if !lastChangeTime.Equal(currentTime) {
+				changeTimeMu.Unlock()
+				changed <- struct{}{}
+				close(changed)
+				return
+			}
+			changeTimeMu.Unlock()
+		}
+	}()
+
+	return changed, nil
+}
+
+func watch(ctx context.Context, t Format) <-chan []byte {
+	recv := make(chan []byte, 1)
+	ti := time.NewTicker(time.Second)
+
+	// Get initial clipboard content
+	var lastContent []byte
+	if b := Read(t); b != nil {
+		lastContent = make([]byte, len(b))
+		copy(lastContent, b)
+	}
+
+	go func() {
+		defer close(recv)
+		defer ti.Stop()
+
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-ti.C:
+				b := Read(t)
+				if b == nil {
+					continue
+				}
+
+				// Check if content changed
+				if !bytes.Equal(lastContent, b) {
+					recv <- b
+					lastContent = make([]byte, len(b))
+					copy(lastContent, b)
+				}
+			}
+		}
+	}()
+	return recv
+}
+
+// Helper function to check clipboard content type for xclip
+func getClipboardTargets() []string {
+	cmd := exec.Command("xclip", "-selection", "clipboard", "-t", "TARGETS", "-o")
+	out, err := cmd.Output()
+	if err != nil {
+		return nil
+	}
+	return strings.Split(string(out), "\n")
+}
diff --git a/packages/tui/internal/clipboard/clipboard_nocgo.go b/packages/tui/internal/clipboard/clipboard_nocgo.go
new file mode 100644
index 000000000..7b3e05f6c
--- /dev/null
+++ b/packages/tui/internal/clipboard/clipboard_nocgo.go
@@ -0,0 +1,25 @@
+//go:build !windows && !darwin && !linux && !cgo
+
+package clipboard
+
+import "context"
+
+func initialize() error {
+	return errNoCgo
+}
+
+func read(t Format) (buf []byte, err error) {
+	panic("clipboard: cannot use when CGO_ENABLED=0")
+}
+
+func readc(t string) ([]byte, error) {
+	panic("clipboard: cannot use when CGO_ENABLED=0")
+}
+
+func write(t Format, buf []byte) (<-chan struct{}, error) {
+	panic("clipboard: cannot use when CGO_ENABLED=0")
+}
+
+func watch(ctx context.Context, t Format) <-chan []byte {
+	panic("clipboard: cannot use when CGO_ENABLED=0")
+}
diff --git a/packages/tui/internal/clipboard/clipboard_windows.go b/packages/tui/internal/clipboard/clipboard_windows.go
new file mode 100644
index 000000000..bd042cda8
--- /dev/null
+++ b/packages/tui/internal/clipboard/clipboard_windows.go
@@ -0,0 +1,551 @@
+// Copyright 2021 The golang.design Initiative Authors.
+// All rights reserved. Use of this source code is governed
+// by a MIT license that can be found in the LICENSE file.
+//
+// Written by Changkun Ou <changkun.de>
+
+//go:build windows
+
+package clipboard
+
+// Interacting with Clipboard on Windows:
+// https://docs.microsoft.com/zh-cn/windows/win32/dataxchg/using-the-clipboard
+
+import (
+	"bytes"
+	"context"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"image"
+	"image/color"
+	"image/png"
+	"reflect"
+	"runtime"
+	"syscall"
+	"time"
+	"unicode/utf16"
+	"unsafe"
+
+	"golang.org/x/image/bmp"
+)
+
+func initialize() error { return nil }
+
+// readText reads the clipboard and returns the text data if presents.
+// The caller is responsible for opening/closing the clipboard before
+// calling this function.
+func readText() (buf []byte, err error) {
+	hMem, _, err := getClipboardData.Call(cFmtUnicodeText)
+	if hMem == 0 {
+		return nil, err
+	}
+	p, _, err := gLock.Call(hMem)
+	if p == 0 {
+		return nil, err
+	}
+	defer gUnlock.Call(hMem)
+
+	// Find NUL terminator
+	n := 0
+	for ptr := unsafe.Pointer(p); *(*uint16)(ptr) != 0; n++ {
+		ptr = unsafe.Pointer(uintptr(ptr) +
+			unsafe.Sizeof(*((*uint16)(unsafe.Pointer(p)))))
+	}
+
+	var s []uint16
+	h := (*reflect.SliceHeader)(unsafe.Pointer(&s))
+	h.Data = p
+	h.Len = n
+	h.Cap = n
+	return []byte(string(utf16.Decode(s))), nil
+}
+
+// writeText writes given data to the clipboard. It is the caller's
+// responsibility for opening/closing the clipboard before calling
+// this function.
+func writeText(buf []byte) error {
+	r, _, err := emptyClipboard.Call()
+	if r == 0 {
+		return fmt.Errorf("failed to clear clipboard: %w", err)
+	}
+
+	// empty text, we are done here.
+	if len(buf) == 0 {
+		return nil
+	}
+
+	s, err := syscall.UTF16FromString(string(buf))
+	if err != nil {
+		return fmt.Errorf("failed to convert given string: %w", err)
+	}
+
+	hMem, _, err := gAlloc.Call(gmemMoveable, uintptr(len(s)*int(unsafe.Sizeof(s[0]))))
+	if hMem == 0 {
+		return fmt.Errorf("failed to alloc global memory: %w", err)
+	}
+
+	p, _, err := gLock.Call(hMem)
+	if p == 0 {
+		return fmt.Errorf("failed to lock global memory: %w", err)
+	}
+	defer gUnlock.Call(hMem)
+
+	// no return value
+	memMove.Call(p, uintptr(unsafe.Pointer(&s[0])),
+		uintptr(len(s)*int(unsafe.Sizeof(s[0]))))
+
+	v, _, err := setClipboardData.Call(cFmtUnicodeText, hMem)
+	if v == 0 {
+		gFree.Call(hMem)
+		return fmt.Errorf("failed to set text to clipboard: %w", err)
+	}
+
+	return nil
+}
+
+// readImage reads the clipboard and returns PNG encoded image data
+// if presents. The caller is responsible for opening/closing the
+// clipboard before calling this function.
+func readImage() ([]byte, error) {
+	hMem, _, err := getClipboardData.Call(cFmtDIBV5)
+	if hMem == 0 {
+		// second chance to try FmtDIB
+		return readImageDib()
+	}
+	p, _, err := gLock.Call(hMem)
+	if p == 0 {
+		return nil, err
+	}
+	defer gUnlock.Call(hMem)
+
+	// inspect header information
+	info := (*bitmapV5Header)(unsafe.Pointer(p))
+
+	// maybe deal with other formats?
+	if info.BitCount != 32 {
+		return nil, errUnsupported
+	}
+
+	var data []byte
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&data))
+	sh.Data = uintptr(p)
+	sh.Cap = int(info.Size + 4*uint32(info.Width)*uint32(info.Height))
+	sh.Len = int(info.Size + 4*uint32(info.Width)*uint32(info.Height))
+	img := image.NewRGBA(image.Rect(0, 0, int(info.Width), int(info.Height)))
+	offset := int(info.Size)
+	stride := int(info.Width)
+	for y := 0; y < int(info.Height); y++ {
+		for x := 0; x < int(info.Width); x++ {
+			idx := offset + 4*(y*stride+x)
+			xhat := (x + int(info.Width)) % int(info.Width)
+			yhat := int(info.Height) - 1 - y
+			r := data[idx+2]
+			g := data[idx+1]
+			b := data[idx+0]
+			a := data[idx+3]
+			img.SetRGBA(xhat, yhat, color.RGBA{r, g, b, a})
+		}
+	}
+	// always use PNG encoding.
+	var buf bytes.Buffer
+	png.Encode(&buf, img)
+	return buf.Bytes(), nil
+}
+
+func readImageDib() ([]byte, error) {
+	const (
+		fileHeaderLen = 14
+		infoHeaderLen = 40
+		cFmtDIB       = 8
+	)
+
+	hClipDat, _, err := getClipboardData.Call(cFmtDIB)
+	if err != nil {
+		return nil, errors.New("not dib format data: " + err.Error())
+	}
+	pMemBlk, _, err := gLock.Call(hClipDat)
+	if pMemBlk == 0 {
+		return nil, errors.New("failed to call global lock: " + err.Error())
+	}
+	defer gUnlock.Call(hClipDat)
+
+	bmpHeader := (*bitmapHeader)(unsafe.Pointer(pMemBlk))
+	dataSize := bmpHeader.SizeImage + fileHeaderLen + infoHeaderLen
+
+	if bmpHeader.SizeImage == 0 && bmpHeader.Compression == 0 {
+		iSizeImage := bmpHeader.Height * ((bmpHeader.Width*uint32(bmpHeader.BitCount)/8 + 3) &^ 3)
+		dataSize += iSizeImage
+	}
+	buf := new(bytes.Buffer)
+	binary.Write(buf, binary.LittleEndian, uint16('B')|(uint16('M')<<8))
+	binary.Write(buf, binary.LittleEndian, uint32(dataSize))
+	binary.Write(buf, binary.LittleEndian, uint32(0))
+	const sizeof_colorbar = 0
+	binary.Write(buf, binary.LittleEndian, uint32(fileHeaderLen+infoHeaderLen+sizeof_colorbar))
+	j := 0
+	for i := fileHeaderLen; i < int(dataSize); i++ {
+		binary.Write(buf, binary.BigEndian, *(*byte)(unsafe.Pointer(pMemBlk + uintptr(j))))
+		j++
+	}
+	return bmpToPng(buf)
+}
+
+func bmpToPng(bmpBuf *bytes.Buffer) (buf []byte, err error) {
+	var f bytes.Buffer
+	original_image, err := bmp.Decode(bmpBuf)
+	if err != nil {
+		return nil, err
+	}
+	err = png.Encode(&f, original_image)
+	if err != nil {
+		return nil, err
+	}
+	return f.Bytes(), nil
+}
+
+func writeImage(buf []byte) error {
+	r, _, err := emptyClipboard.Call()
+	if r == 0 {
+		return fmt.Errorf("failed to clear clipboard: %w", err)
+	}
+
+	// empty text, we are done here.
+	if len(buf) == 0 {
+		return nil
+	}
+
+	img, err := png.Decode(bytes.NewReader(buf))
+	if err != nil {
+		return fmt.Errorf("input bytes is not PNG encoded: %w", err)
+	}
+
+	offset := unsafe.Sizeof(bitmapV5Header{})
+	width := img.Bounds().Dx()
+	height := img.Bounds().Dy()
+	imageSize := 4 * width * height
+
+	data := make([]byte, int(offset)+imageSize)
+	for y := 0; y < height; y++ {
+		for x := 0; x < width; x++ {
+			idx := int(offset) + 4*(y*width+x)
+			r, g, b, a := img.At(x, height-1-y).RGBA()
+			data[idx+2] = uint8(r)
+			data[idx+1] = uint8(g)
+			data[idx+0] = uint8(b)
+			data[idx+3] = uint8(a)
+		}
+	}
+
+	info := bitmapV5Header{}
+	info.Size = uint32(offset)
+	info.Width = int32(width)
+	info.Height = int32(height)
+	info.Planes = 1
+	info.Compression = 0 // BI_RGB
+	info.SizeImage = uint32(4 * info.Width * info.Height)
+	info.RedMask = 0xff0000 // default mask
+	info.GreenMask = 0xff00
+	info.BlueMask = 0xff
+	info.AlphaMask = 0xff000000
+	info.BitCount = 32 // we only deal with 32 bpp at the moment.
+	// Use calibrated RGB values as Go's image/png assumes linear color space.
+	// Other options:
+	// - LCS_CALIBRATED_RGB = 0x00000000
+	// - LCS_sRGB = 0x73524742
+	// - LCS_WINDOWS_COLOR_SPACE = 0x57696E20
+	// https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-wmf/eb4bbd50-b3ce-4917-895c-be31f214797f
+	info.CSType = 0x73524742
+	// Use GL_IMAGES for GamutMappingIntent
+	// Other options:
+	// - LCS_GM_ABS_COLORIMETRIC = 0x00000008
+	// - LCS_GM_BUSINESS = 0x00000001
+	// - LCS_GM_GRAPHICS = 0x00000002
+	// - LCS_GM_IMAGES = 0x00000004
+	// https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-wmf/9fec0834-607d-427d-abd5-ab240fb0db38
+	info.Intent = 4 // LCS_GM_IMAGES
+
+	infob := make([]byte, int(unsafe.Sizeof(info)))
+	for i, v := range *(*[unsafe.Sizeof(info)]byte)(unsafe.Pointer(&info)) {
+		infob[i] = v
+	}
+	copy(data[:], infob[:])
+
+	hMem, _, err := gAlloc.Call(gmemMoveable,
+		uintptr(len(data)*int(unsafe.Sizeof(data[0]))))
+	if hMem == 0 {
+		return fmt.Errorf("failed to alloc global memory: %w", err)
+	}
+
+	p, _, err := gLock.Call(hMem)
+	if p == 0 {
+		return fmt.Errorf("failed to lock global memory: %w", err)
+	}
+	defer gUnlock.Call(hMem)
+
+	memMove.Call(p, uintptr(unsafe.Pointer(&data[0])),
+		uintptr(len(data)*int(unsafe.Sizeof(data[0]))))
+
+	v, _, err := setClipboardData.Call(cFmtDIBV5, hMem)
+	if v == 0 {
+		gFree.Call(hMem)
+		return fmt.Errorf("failed to set text to clipboard: %w", err)
+	}
+
+	return nil
+}
+
+func read(t Format) (buf []byte, err error) {
+	// On Windows, OpenClipboard and CloseClipboard must be executed on
+	// the same thread. Thus, lock the OS thread for further execution.
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	var format uintptr
+	switch t {
+	case FmtImage:
+		format = cFmtDIBV5
+	case FmtText:
+		fallthrough
+	default:
+		format = cFmtUnicodeText
+	}
+
+	// check if clipboard is avaliable for the requested format
+	r, _, err := isClipboardFormatAvailable.Call(format)
+	if r == 0 {
+		return nil, errUnavailable
+	}
+
+	// try again until open clipboard successed
+	for {
+		r, _, _ = openClipboard.Call()
+		if r == 0 {
+			continue
+		}
+		break
+	}
+	defer closeClipboard.Call()
+
+	switch format {
+	case cFmtDIBV5:
+		return readImage()
+	case cFmtUnicodeText:
+		fallthrough
+	default:
+		return readText()
+	}
+}
+
+// write writes the given data to clipboard and
+// returns true if success or false if failed.
+func write(t Format, buf []byte) (<-chan struct{}, error) {
+	errch := make(chan error)
+	changed := make(chan struct{}, 1)
+	go func() {
+		// make sure GetClipboardSequenceNumber happens with
+		// OpenClipboard on the same thread.
+		runtime.LockOSThread()
+		defer runtime.UnlockOSThread()
+		for {
+			r, _, _ := openClipboard.Call(0)
+			if r == 0 {
+				continue
+			}
+			break
+		}
+
+		// var param uintptr
+		switch t {
+		case FmtImage:
+			err := writeImage(buf)
+			if err != nil {
+				errch <- err
+				closeClipboard.Call()
+				return
+			}
+		case FmtText:
+			fallthrough
+		default:
+			// param = cFmtUnicodeText
+			err := writeText(buf)
+			if err != nil {
+				errch <- err
+				closeClipboard.Call()
+				return
+			}
+		}
+		// Close the clipboard otherwise other applications cannot
+		// paste the data.
+		closeClipboard.Call()
+
+		cnt, _, _ := getClipboardSequenceNumber.Call()
+		errch <- nil
+		for {
+			time.Sleep(time.Second)
+			cur, _, _ := getClipboardSequenceNumber.Call()
+			if cur != cnt {
+				changed <- struct{}{}
+				close(changed)
+				return
+			}
+		}
+	}()
+	err := <-errch
+	if err != nil {
+		return nil, err
+	}
+	return changed, nil
+}
+
+func watch(ctx context.Context, t Format) <-chan []byte {
+	recv := make(chan []byte, 1)
+	ready := make(chan struct{})
+	go func() {
+		// not sure if we are too slow or the user too fast :)
+		ti := time.NewTicker(time.Second)
+		cnt, _, _ := getClipboardSequenceNumber.Call()
+		ready <- struct{}{}
+		for {
+			select {
+			case <-ctx.Done():
+				close(recv)
+				return
+			case <-ti.C:
+				cur, _, _ := getClipboardSequenceNumber.Call()
+				if cnt != cur {
+					b := Read(t)
+					if b == nil {
+						continue
+					}
+					recv <- b
+					cnt = cur
+				}
+			}
+		}
+	}()
+	<-ready
+	return recv
+}
+
+const (
+	cFmtBitmap      = 2 // Win+PrintScreen
+	cFmtUnicodeText = 13
+	cFmtDIBV5       = 17
+	// Screenshot taken from special shortcut is in different format (why??), see:
+	// https://jpsoft.com/forums/threads/detecting-clipboard-format.5225/
+	cFmtDataObject = 49161 // Shift+Win+s, returned from enumClipboardFormats
+	gmemMoveable   = 0x0002
+)
+
+// BITMAPV5Header structure, see:
+// https://docs.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-bitmapv5header
+type bitmapV5Header struct {
+	Size          uint32
+	Width         int32
+	Height        int32
+	Planes        uint16
+	BitCount      uint16
+	Compression   uint32
+	SizeImage     uint32
+	XPelsPerMeter int32
+	YPelsPerMeter int32
+	ClrUsed       uint32
+	ClrImportant  uint32
+	RedMask       uint32
+	GreenMask     uint32
+	BlueMask      uint32
+	AlphaMask     uint32
+	CSType        uint32
+	Endpoints     struct {
+		CiexyzRed, CiexyzGreen, CiexyzBlue struct {
+			CiexyzX, CiexyzY, CiexyzZ int32 // FXPT2DOT30
+		}
+	}
+	GammaRed    uint32
+	GammaGreen  uint32
+	GammaBlue   uint32
+	Intent      uint32
+	ProfileData uint32
+	ProfileSize uint32
+	Reserved    uint32
+}
+
+type bitmapHeader struct {
+	Size          uint32
+	Width         uint32
+	Height        uint32
+	PLanes        uint16
+	BitCount      uint16
+	Compression   uint32
+	SizeImage     uint32
+	XPelsPerMeter uint32
+	YPelsPerMeter uint32
+	ClrUsed       uint32
+	ClrImportant  uint32
+}
+
+// Calling a Windows DLL, see:
+// https://github.com/golang/go/wiki/WindowsDLLs
+var (
+	user32 = syscall.MustLoadDLL("user32")
+	// Opens the clipboard for examination and prevents other
+	// applications from modifying the clipboard content.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-openclipboard
+	openClipboard = user32.MustFindProc("OpenClipboard")
+	// Closes the clipboard.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-closeclipboard
+	closeClipboard = user32.MustFindProc("CloseClipboard")
+	// Empties the clipboard and frees handles to data in the clipboard.
+	// The function then assigns ownership of the clipboard to the
+	// window that currently has the clipboard open.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-emptyclipboard
+	emptyClipboard = user32.MustFindProc("EmptyClipboard")
+	// Retrieves data from the clipboard in a specified format.
+	// The clipboard must have been opened previously.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getclipboarddata
+	getClipboardData = user32.MustFindProc("GetClipboardData")
+	// Places data on the clipboard in a specified clipboard format.
+	// The window must be the current clipboard owner, and the
+	// application must have called the OpenClipboard function. (When
+	// responding to the WM_RENDERFORMAT message, the clipboard owner
+	// must not call OpenClipboard before calling SetClipboardData.)
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-setclipboarddata
+	setClipboardData = user32.MustFindProc("SetClipboardData")
+	// Determines whether the clipboard contains data in the specified format.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-isclipboardformatavailable
+	isClipboardFormatAvailable = user32.MustFindProc("IsClipboardFormatAvailable")
+	// Clipboard data formats are stored in an ordered list. To perform
+	// an enumeration of clipboard data formats, you make a series of
+	// calls to the EnumClipboardFormats function. For each call, the
+	// format parameter specifies an available clipboard format, and the
+	// function returns the next available clipboard format.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-isclipboardformatavailable
+	enumClipboardFormats = user32.MustFindProc("EnumClipboardFormats")
+	// Retrieves the clipboard sequence number for the current window station.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getclipboardsequencenumber
+	getClipboardSequenceNumber = user32.MustFindProc("GetClipboardSequenceNumber")
+	// Registers a new clipboard format. This format can then be used as
+	// a valid clipboard format.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-registerclipboardformata
+	registerClipboardFormatA = user32.MustFindProc("RegisterClipboardFormatA")
+
+	kernel32 = syscall.NewLazyDLL("kernel32")
+
+	// Locks a global memory object and returns a pointer to the first
+	// byte of the object's memory block.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-globallock
+	gLock = kernel32.NewProc("GlobalLock")
+	// Decrements the lock count associated with a memory object that was
+	// allocated with GMEM_MOVEABLE. This function has no effect on memory
+	// objects allocated with GMEM_FIXED.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-globalunlock
+	gUnlock = kernel32.NewProc("GlobalUnlock")
+	// Allocates the specified number of bytes from the heap.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-globalalloc
+	gAlloc = kernel32.NewProc("GlobalAlloc")
+	// Frees the specified global memory object and invalidates its handle.
+	// https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-globalfree
+	gFree   = kernel32.NewProc("GlobalFree")
+	memMove = kernel32.NewProc("RtlMoveMemory")
+)
diff --git a/packages/tui/internal/components/chat/editor.go b/packages/tui/internal/components/chat/editor.go
index 071f22d0e..6053c9c01 100644
--- a/packages/tui/internal/components/chat/editor.go
+++ b/packages/tui/internal/components/chat/editor.go
@@ -15,13 +15,13 @@ import (
 	"github.com/google/uuid"
 	"github.com/sst/opencode-sdk-go"
 	"github.com/sst/opencode/internal/app"
+	"github.com/sst/opencode/internal/clipboard"
 	"github.com/sst/opencode/internal/commands"
 	"github.com/sst/opencode/internal/components/dialog"
 	"github.com/sst/opencode/internal/components/textarea"
 	"github.com/sst/opencode/internal/styles"
 	"github.com/sst/opencode/internal/theme"
 	"github.com/sst/opencode/internal/util"
-	"golang.design/x/clipboard"
 )
 
 type EditorComponent interface {