Refactor UI to use interfaces everywhere

4 files changed, 7 insertions, 776 deletions

diff --git a/ui/widget/message-view.go b/ui/widget/message-view.go
deleted file mode 100644
index f0bdbad..0000000
--- a/ui/widget/message-view.go
+++ /dev/null
@@ -1,354 +0,0 @@
-// gomuks - A terminal Matrix client written in Go.
-// Copyright (C) 2018 Tulir Asokan
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-package widget
-
-import (
-	"encoding/gob"
-	"fmt"
-	"math"
-	"os"
-	"time"
-
-	"github.com/gdamore/tcell"
-	"maunium.net/go/gomuks/ui/debug"
-	"maunium.net/go/gomuks/ui/types"
-	"maunium.net/go/tview"
-)
-
-type MessageView struct {
-	*tview.Box
-
-	ScrollOffset    int
-	MaxSenderWidth  int
-	DateFormat      string
-	TimestampFormat string
-	TimestampWidth  int
-	LoadingMessages bool
-
-	widestSender int
-	prevWidth    int
-	prevHeight   int
-	prevMsgCount int
-
-	messageIDs map[string]*types.Message
-	messages   []*types.Message
-
-	textBuffer []string
-	metaBuffer []types.MessageMeta
-}
-
-func NewMessageView() *MessageView {
-	return &MessageView{
-		Box:             tview.NewBox(),
-		MaxSenderWidth:  15,
-		DateFormat:      "January _2, 2006",
-		TimestampFormat: "15:04:05",
-		TimestampWidth:  8,
-		ScrollOffset:    0,
-
-		messages:   make([]*types.Message, 0),
-		messageIDs: make(map[string]*types.Message),
-		textBuffer: make([]string, 0),
-		metaBuffer: make([]types.MessageMeta, 0),
-
-		widestSender: 5,
-		prevWidth:    -1,
-		prevHeight:   -1,
-		prevMsgCount: -1,
-	}
-}
-
-func (view *MessageView) NewMessage(id, sender, msgtype, text string, timestamp time.Time) *types.Message {
-	return types.NewMessage(id, sender, msgtype, text,
-		timestamp.Format(view.TimestampFormat),
-		timestamp.Format(view.DateFormat),
-		GetHashColor(sender))
-}
-
-func (view *MessageView) SaveHistory(path string) error {
-	file, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE, 0600)
-	if err != nil {
-		return err
-	}
-	defer file.Close()
-
-	enc := gob.NewEncoder(file)
-	err = enc.Encode(view.messages)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func (view *MessageView) LoadHistory(path string) (int, error) {
-	file, err := os.OpenFile(path, os.O_RDONLY, 0600)
-	if err != nil {
-		if os.IsNotExist(err) {
-			return 0, nil
-		}
-		return -1, err
-	}
-	defer file.Close()
-
-	dec := gob.NewDecoder(file)
-	err = dec.Decode(&view.messages)
-	if err != nil {
-		return -1, err
-	}
-
-	for _, message := range view.messages {
-		view.updateWidestSender(message.Sender)
-	}
-
-	return len(view.messages), nil
-}
-
-func (view *MessageView) updateWidestSender(sender string) {
-	if len(sender) > view.widestSender {
-		view.widestSender = len(sender)
-		if view.widestSender > view.MaxSenderWidth {
-			view.widestSender = view.MaxSenderWidth
-		}
-	}
-}
-
-type MessageDirection int
-
-const (
-	AppendMessage MessageDirection = iota
-	PrependMessage
-	IgnoreMessage
-)
-
-func (view *MessageView) UpdateMessageID(message *types.Message, newID string) {
-	delete(view.messageIDs, message.ID)
-	message.ID = newID
-	view.messageIDs[message.ID] = message
-}
-
-func (view *MessageView) AddMessage(message *types.Message, direction MessageDirection) {
-	if message == nil {
-		return
-	}
-
-	msg, messageExists := view.messageIDs[message.ID]
-	if msg != nil && messageExists {
-		message.CopyTo(msg)
-		message = msg
-		direction = IgnoreMessage
-	}
-
-	view.updateWidestSender(message.Sender)
-
-	_, _, width, _ := view.GetInnerRect()
-	width -= view.TimestampWidth + TimestampSenderGap + view.widestSender + SenderMessageGap
-	message.CalculateBuffer(width)
-
-	if direction == AppendMessage {
-		if view.ScrollOffset > 0 {
-			view.ScrollOffset += message.Height()
-		}
-		view.messages = append(view.messages, message)
-		view.appendBuffer(message)
-	} else if direction == PrependMessage {
-		view.messages = append([]*types.Message{message}, view.messages...)
-	}
-
-	view.messageIDs[message.ID] = message
-}
-
-func (view *MessageView) appendBuffer(message *types.Message) {
-	if len(view.metaBuffer) > 0 {
-		prevMeta := view.metaBuffer[len(view.metaBuffer)-1]
-		if prevMeta != nil && prevMeta.GetDate() != message.Date {
-			view.textBuffer = append(view.textBuffer, fmt.Sprintf("Date changed to %s", message.Date))
-			view.metaBuffer = append(view.metaBuffer, &types.BasicMeta{TextColor: tcell.ColorGreen})
-		}
-	}
-
-	view.textBuffer = append(view.textBuffer, message.Buffer()...)
-	for range message.Buffer() {
-		view.metaBuffer = append(view.metaBuffer, message)
-	}
-	view.prevMsgCount++
-}
-
-func (view *MessageView) recalculateBuffers() {
-	_, _, width, height := view.GetInnerRect()
-
-	width -= view.TimestampWidth + TimestampSenderGap + view.widestSender + SenderMessageGap
-	recalculateMessageBuffers := width != view.prevWidth
-	if height != view.prevHeight || recalculateMessageBuffers || len(view.messages) != view.prevMsgCount {
-		view.textBuffer = []string{}
-		view.metaBuffer = []types.MessageMeta{}
-		view.prevMsgCount = 0
-		for _, message := range view.messages {
-			if recalculateMessageBuffers {
-				message.CalculateBuffer(width)
-			}
-			view.appendBuffer(message)
-		}
-		view.prevHeight = height
-		view.prevWidth = width
-	}
-}
-
-const PaddingAtTop = 5
-
-func (view *MessageView) AddScrollOffset(diff int) {
-	_, _, _, height := view.GetInnerRect()
-
-	totalHeight := len(view.textBuffer)
-	if diff >= 0 && view.ScrollOffset+diff >= totalHeight-height+PaddingAtTop {
-		view.ScrollOffset = totalHeight - height + PaddingAtTop
-	} else {
-		view.ScrollOffset += diff
-	}
-
-	if view.ScrollOffset > totalHeight-height+PaddingAtTop {
-		view.ScrollOffset = totalHeight - height + PaddingAtTop
-	}
-	if view.ScrollOffset < 0 {
-		view.ScrollOffset = 0
-	}
-}
-
-func (view *MessageView) Height() int {
-	_, _, _, height := view.GetInnerRect()
-	return height
-}
-
-func (view *MessageView) TotalHeight() int {
-	return len(view.textBuffer)
-}
-
-func (view *MessageView) IsAtTop() bool {
-	_, _, _, height := view.GetInnerRect()
-	totalHeight := len(view.textBuffer)
-	return view.ScrollOffset >= totalHeight-height+PaddingAtTop
-}
-
-const (
-	TimestampSenderGap = 1
-	SenderSeparatorGap = 1
-	SenderMessageGap   = 3
-)
-
-func getScrollbarStyle(scrollbarHere, isTop, isBottom bool) (char rune, style tcell.Style) {
-	char = '│'
-	style = tcell.StyleDefault
-	if scrollbarHere {
-		style = style.Foreground(tcell.ColorGreen)
-	}
-	if isTop {
-		if scrollbarHere {
-			char = '╥'
-		} else {
-			char = '┬'
-		}
-	} else if isBottom {
-		if scrollbarHere {
-			char = '╨'
-		} else {
-			char = '┴'
-		}
-	} else if scrollbarHere {
-		char = '║'
-	}
-	return
-}
-
-func (view *MessageView) Draw(screen tcell.Screen) {
-	view.Box.Draw(screen)
-
-	x, y, _, height := view.GetInnerRect()
-	view.recalculateBuffers()
-
-	if len(view.textBuffer) == 0 {
-		writeLineSimple(screen, "It's quite empty in here.", x, y+height)
-		return
-	}
-
-	usernameX := x + view.TimestampWidth + TimestampSenderGap
-	messageX := usernameX + view.widestSender + SenderMessageGap
-	separatorX := usernameX + view.widestSender + SenderSeparatorGap
-
-	indexOffset := len(view.textBuffer) - view.ScrollOffset - height
-	if indexOffset <= -PaddingAtTop {
-		message := "Scroll up to load more messages."
-		if view.LoadingMessages {
-			message = "Loading more messages..."
-		}
-		writeLineSimpleColor(screen, message, messageX, y, tcell.ColorGreen)
-	}
-
-	if len(view.textBuffer) != len(view.metaBuffer) {
-		debug.ExtPrintf("Unexpected text/meta buffer length mismatch: %d != %d.", len(view.textBuffer), len(view.metaBuffer))
-		return
-	}
-
-	var scrollBarHeight, scrollBarPos int
-	// Black magic (aka math) used to figure out where the scroll bar should be put.
-	{
-		viewportHeight := float64(height)
-		contentHeight := float64(len(view.textBuffer))
-
-		scrollBarHeight = int(math.Ceil(viewportHeight / (contentHeight / viewportHeight)))
-
-		scrollBarPos = height - int(math.Round(float64(view.ScrollOffset)/contentHeight*viewportHeight))
-	}
-
-	var prevMeta types.MessageMeta
-	firstLine := true
-	skippedLines := 0
-
-	for line := 0; line < height; line++ {
-		index := indexOffset + line
-		if index < 0 {
-			skippedLines++
-			continue
-		} else if index >= len(view.textBuffer) {
-			break
-		}
-
-		showScrollbar := line-skippedLines >= scrollBarPos-scrollBarHeight && line-skippedLines < scrollBarPos
-		isTop := firstLine && view.ScrollOffset+height >= len(view.textBuffer)
-		isBottom := line == height-1 && view.ScrollOffset == 0
-
-		borderChar, borderStyle := getScrollbarStyle(showScrollbar, isTop, isBottom)
-
-		firstLine = false
-
-		screen.SetContent(separatorX, y+line, borderChar, nil, borderStyle)
-
-		text, meta := view.textBuffer[index], view.metaBuffer[index]
-		if meta != prevMeta {
-			if len(meta.GetTimestamp()) > 0 {
-				writeLineSimpleColor(screen, meta.GetTimestamp(), x, y+line, meta.GetTimestampColor())
-			}
-			if prevMeta == nil || meta.GetSender() != prevMeta.GetSender() {
-				writeLineColor(
-					screen, tview.AlignRight, meta.GetSender(),
-					usernameX, y+line, view.widestSender,
-					meta.GetSenderColor())
-			}
-			prevMeta = meta
-		}
-		writeLineSimpleColor(screen, text, messageX, y+line, meta.GetTextColor())
-	}
-}
diff --git a/ui/widget/room-list.go b/ui/widget/room-list.go
deleted file mode 100644
index d2fb543..0000000
--- a/ui/widget/room-list.go
+++ /dev/null
@@ -1,140 +0,0 @@
-// gomuks - A terminal Matrix client written in Go.
-// Copyright (C) 2018 Tulir Asokan
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-package widget
-
-import (
-	"fmt"
-	"strconv"
-
-	"github.com/gdamore/tcell"
-	"maunium.net/go/gomuks/matrix/rooms"
-	"maunium.net/go/tview"
-)
-
-type RoomList struct {
-	*tview.Box
-
-	indices  map[*rooms.Room]int
-	items    []*rooms.Room
-	selected *rooms.Room
-
-	// The item main text color.
-	mainTextColor tcell.Color
-	// The text color for selected items.
-	selectedTextColor tcell.Color
-	// The background color for selected items.
-	selectedBackgroundColor tcell.Color
-}
-
-func NewRoomList() *RoomList {
-	return &RoomList{
-		Box:     tview.NewBox(),
-		indices: make(map[*rooms.Room]int),
-		items:   []*rooms.Room{},
-
-		mainTextColor:           tcell.ColorWhite,
-		selectedTextColor:       tcell.ColorWhite,
-		selectedBackgroundColor: tcell.ColorDarkGreen,
-	}
-}
-
-func (list *RoomList) Add(room *rooms.Room) {
-	list.indices[room] = len(list.items)
-	list.items = append(list.items, room)
-	if list.selected == nil {
-		list.selected = room
-	}
-}
-
-func (list *RoomList) Remove(room *rooms.Room) {
-	index, ok := list.indices[room]
-	if !ok {
-		return
-	}
-	delete(list.indices, room)
-	list.items = append(list.items[0:index], list.items[index+1:]...)
-	if len(list.items) == 0 {
-		list.selected = nil
-	}
-}
-
-func (list *RoomList) Clear() {
-	list.indices = make(map[*rooms.Room]int)
-	list.items = []*rooms.Room{}
-	list.selected = nil
-}
-
-func (list *RoomList) SetSelected(room *rooms.Room) {
-	list.selected = room
-}
-
-// Draw draws this primitive onto the screen.
-func (list *RoomList) Draw(screen tcell.Screen) {
-	list.Box.Draw(screen)
-
-	x, y, width, height := list.GetInnerRect()
-	bottomLimit := y + height
-
-	var offset int
-	currentItemIndex, hasSelected := list.indices[list.selected]
-	if hasSelected && currentItemIndex >= height {
-		offset = currentItemIndex + 1 - height
-	}
-
-	// Draw the list items.
-	for index, item := range list.items {
-		if index < offset {
-			continue
-		}
-
-		if y >= bottomLimit {
-			break
-		}
-
-		text := item.GetTitle()
-
-		lineWidth := width
-
-		style := tcell.StyleDefault.Foreground(list.mainTextColor)
-		if item == list.selected {
-			style = style.Foreground(list.selectedTextColor).Background(list.selectedBackgroundColor)
-		}
-		if item.HasNewMessages {
-			style = style.Bold(true)
-		}
-
-		if item.UnreadMessages > 0 {
-			unreadMessageCount := "99+"
-			if item.UnreadMessages < 100 {
-				unreadMessageCount = strconv.Itoa(item.UnreadMessages)
-			}
-			if item.Highlighted {
-				unreadMessageCount += "!"
-			}
-			unreadMessageCount = fmt.Sprintf("(%s)", unreadMessageCount)
-			writeLine(screen, tview.AlignRight, unreadMessageCount, x+lineWidth-6, y, 6, style)
-			lineWidth -= len(unreadMessageCount) + 1
-		}
-
-		writeLine(screen, tview.AlignLeft, text, x, y, lineWidth, style)
-
-		y++
-		if y >= bottomLimit {
-			break
-		}
-	}
-}
diff --git a/ui/widget/room-view.go b/ui/widget/room-view.go
deleted file mode 100644
index 4bab779..0000000
--- a/ui/widget/room-view.go
+++ /dev/null
@@ -1,275 +0,0 @@
-// gomuks - A terminal Matrix client written in Go.
-// Copyright (C) 2018 Tulir Asokan
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-package widget
-
-import (
-	"fmt"
-	"path/filepath"
-	"strconv"
-	"strings"
-	"time"
-
-	"github.com/gdamore/tcell"
-	"maunium.net/go/gomuks/matrix/rooms"
-	"maunium.net/go/gomuks/ui/types"
-	"maunium.net/go/tview"
-)
-
-type RoomView struct {
-	*tview.Box
-
-	topic    *tview.TextView
-	content  *MessageView
-	status   *tview.TextView
-	userList *tview.TextView
-	ulBorder *Border
-	input    *AdvancedInputField
-	Room     *rooms.Room
-}
-
-func NewRoomView(room *rooms.Room) *RoomView {
-	view := &RoomView{
-		Box:      tview.NewBox(),
-		topic:    tview.NewTextView(),
-		content:  NewMessageView(),
-		status:   tview.NewTextView(),
-		userList: tview.NewTextView(),
-		ulBorder: NewBorder(),
-		input:    NewAdvancedInputField(),
-		Room:     room,
-	}
-
-	view.input.
-		SetFieldBackgroundColor(tcell.ColorDefault).
-		SetPlaceholder("Send a message...").
-		SetPlaceholderExtColor(tcell.ColorGray)
-
-	view.topic.
-		SetText(strings.Replace(room.GetTopic(), "\n", " ", -1)).
-		SetBackgroundColor(tcell.ColorDarkGreen)
-
-	view.status.SetBackgroundColor(tcell.ColorDimGray)
-
-	view.userList.
-		SetDynamicColors(true).
-		SetWrap(false)
-
-	return view
-}
-
-func (view *RoomView) logPath(dir string) string {
-	return filepath.Join(dir, fmt.Sprintf("%s.gmxlog", view.Room.ID))
-}
-
-func (view *RoomView) SaveHistory(dir string) error {
-	return view.MessageView().SaveHistory(view.logPath(dir))
-}
-
-func (view *RoomView) LoadHistory(dir string) (int, error) {
-	return view.MessageView().LoadHistory(view.logPath(dir))
-}
-
-func (view *RoomView) SetTabCompleteFunc(fn func(room *RoomView, text string, cursorOffset int) string) *RoomView {
-	view.input.SetTabCompleteFunc(func(text string, cursorOffset int) string {
-		return fn(view, text, cursorOffset)
-	})
-	return view
-}
-
-func (view *RoomView) SetInputCapture(fn func(room *RoomView, event *tcell.EventKey) *tcell.EventKey) *RoomView {
-	view.input.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
-		return fn(view, event)
-	})
-	return view
-}
-
-func (view *RoomView) SetMouseCapture(fn func(room *RoomView, event *tcell.EventMouse) *tcell.EventMouse) *RoomView {
-	view.input.SetMouseCapture(func(event *tcell.EventMouse) *tcell.EventMouse {
-		return fn(view, event)
-	})
-	return view
-}
-
-func (view *RoomView) SetInputSubmitFunc(fn func(room *RoomView, text string)) *RoomView {
-	view.input.SetDoneFunc(func(key tcell.Key) {
-		if key == tcell.KeyEnter {
-			fn(view, view.input.GetText())
-		}
-	})
-	return view
-}
-
-func (view *RoomView) SetInputChangedFunc(fn func(room *RoomView, text string)) *RoomView {
-	view.input.SetChangedFunc(func(text string) {
-		fn(view, text)
-	})
-	return view
-}
-
-func (view *RoomView) SetInputText(newText string) *RoomView {
-	view.input.SetText(newText)
-	return view
-}
-
-func (view *RoomView) GetInputText() string {
-	return view.input.GetText()
-}
-
-func (view *RoomView) GetInputField() *AdvancedInputField {
-	return view.input
-}
-
-func (view *RoomView) Focus(delegate func(p tview.Primitive)) {
-	delegate(view.input)
-}
-
-// Constants defining the size of the room view grid.
-const (
-	UserListBorderWidth   = 1
-	UserListWidth         = 20
-	StaticHorizontalSpace = UserListBorderWidth + UserListWidth
-
-	TopicBarHeight      = 1
-	StatusBarHeight     = 1
-	InputBarHeight      = 1
-	StaticVerticalSpace = TopicBarHeight + StatusBarHeight + InputBarHeight
-)
-
-func (view *RoomView) Draw(screen tcell.Screen) {
-	x, y, width, height := view.GetInnerRect()
-	if width <= 0 || height <= 0 {
-		return
-	}
-
-	// Calculate actual grid based on view rectangle and constants defined above.
-	var (
-		contentHeight = height - StaticVerticalSpace
-		contentWidth  = width - StaticHorizontalSpace
-
-		userListBorderColumn = x + contentWidth
-		userListColumn       = userListBorderColumn + UserListBorderWidth
-
-		topicRow   = y
-		contentRow = topicRow + TopicBarHeight
-		statusRow  = contentRow + contentHeight
-		inputRow   = statusRow + StatusBarHeight
-	)
-
-	// Update the rectangles of all the children.
-	view.topic.SetRect(x, topicRow, width, TopicBarHeight)
-	view.content.SetRect(x, contentRow, contentWidth, contentHeight)
-	view.status.SetRect(x, statusRow, width, StatusBarHeight)
-	if userListColumn > x {
-		view.userList.SetRect(userListColumn, contentRow, UserListWidth, contentHeight)
-		view.ulBorder.SetRect(userListBorderColumn, contentRow, UserListBorderWidth, contentHeight)
-	}
-	view.input.SetRect(x, inputRow, width, InputBarHeight)
-
-	// Draw everything
-	view.Box.Draw(screen)
-	view.topic.Draw(screen)
-	view.content.Draw(screen)
-	view.status.Draw(screen)
-	view.input.Draw(screen)
-	view.ulBorder.Draw(screen)
-	view.userList.Draw(screen)
-}
-
-func (view *RoomView) SetStatus(status string) {
-	view.status.SetText(status)
-}
-
-func (view *RoomView) SetTyping(users []string) {
-	for index, user := range users {
-		member := view.Room.GetMember(user)
-		if member != nil {
-			users[index] = member.DisplayName
-		}
-	}
-	if len(users) == 0 {
-		view.status.SetText("")
-	} else if len(users) < 2 {
-		view.status.SetText("Typing: " + strings.Join(users, " and "))
-	} else {
-		view.status.SetText(fmt.Sprintf(
-			"Typing: %s and %s",
-			strings.Join(users[:len(users)-1], ", "), users[len(users)-1]))
-	}
-}
-
-func (view *RoomView) AutocompleteUser(existingText string) (completions []string) {
-	textWithoutPrefix := existingText
-	if strings.HasPrefix(existingText, "@") {
-		textWithoutPrefix = existingText[1:]
-	}
-	for _, user := range view.Room.GetMembers() {
-		if strings.HasPrefix(user.DisplayName, textWithoutPrefix) {
-			completions = append(completions, user.DisplayName)
-		} else if strings.HasPrefix(user.UserID, existingText) {
-			completions = append(completions, user.UserID)
-		}
-	}
-	return
-}
-
-func (view *RoomView) MessageView() *MessageView {
-	return view.content
-}
-
-func (view *RoomView) UpdateUserList() {
-	var joined strings.Builder
-	var invited strings.Builder
-	for _, user := range view.Room.GetMembers() {
-		if user.Membership == "join" {
-			joined.WriteString(AddHashColor(user.DisplayName))
-			joined.WriteRune('\n')
-		} else if user.Membership == "invite" {
-			invited.WriteString(AddHashColor(user.DisplayName))
-			invited.WriteRune('\n')
-		}
-	}
-	view.userList.Clear()
-	fmt.Fprintf(view.userList, "%s\n", joined.String())
-	if invited.Len() > 0 {
-		fmt.Fprintf(view.userList, "\nInvited:\n%s", invited.String())
-	}
-}
-
-func (view *RoomView) NewMessage(id, sender, msgtype, text string, timestamp time.Time) *types.Message {
-	member := view.Room.GetMember(sender)
-	if member != nil {
-		sender = member.DisplayName
-	}
-	return view.content.NewMessage(id, sender, msgtype, text, timestamp)
-}
-
-func (view *RoomView) NewTempMessage(msgtype, text string) *types.Message {
-	now := time.Now()
-	id := strconv.FormatInt(now.UnixNano(), 10)
-	sender := ""
-	if ownerMember := view.Room.GetSessionOwner(); ownerMember != nil {
-		sender = ownerMember.DisplayName
-	}
-	message := view.NewMessage(id, sender, msgtype, text, now)
-	message.State = types.MessageStateSending
-	view.AddMessage(message, AppendMessage)
-	return message
-}
-
-func (view *RoomView) AddMessage(message *types.Message, direction MessageDirection) {
-	view.content.AddMessage(message, direction)
-}
diff --git a/ui/widget/util.go b/ui/widget/util.go
index 0888210..bd80903 100644
--- a/ui/widget/util.go
+++ b/ui/widget/util.go
@@ -22,19 +22,19 @@ import (
 	"maunium.net/go/tview"
 )
 
-func writeLineSimple(screen tcell.Screen, line string, x, y int) {
-	writeLine(screen, tview.AlignLeft, line, x, y, 1<<30, tcell.StyleDefault)
+func WriteLineSimple(screen tcell.Screen, line string, x, y int) {
+	WriteLine(screen, tview.AlignLeft, line, x, y, 1<<30, tcell.StyleDefault)
 }
 
-func writeLineSimpleColor(screen tcell.Screen, line string, x, y int, color tcell.Color) {
-	writeLine(screen, tview.AlignLeft, line, x, y, 1<<30, tcell.StyleDefault.Foreground(color))
+func WriteLineSimpleColor(screen tcell.Screen, line string, x, y int, color tcell.Color) {
+	WriteLine(screen, tview.AlignLeft, line, x, y, 1<<30, tcell.StyleDefault.Foreground(color))
 }
 
-func writeLineColor(screen tcell.Screen, align int, line string, x, y, maxWidth int, color tcell.Color) {
-	writeLine(screen, align, line, x, y, maxWidth, tcell.StyleDefault.Foreground(color))
+func WriteLineColor(screen tcell.Screen, align int, line string, x, y, maxWidth int, color tcell.Color) {
+	WriteLine(screen, align, line, x, y, maxWidth, tcell.StyleDefault.Foreground(color))
 }
 
-func writeLine(screen tcell.Screen, align int, line string, x, y, maxWidth int, style tcell.Style) {
+func WriteLine(screen tcell.Screen, align int, line string, x, y, maxWidth int, style tcell.Style) {
 	offsetX := 0
 	if align == tview.AlignRight {
 		offsetX = maxWidth - runewidth.StringWidth(line)