13 files changed, 1387 insertions, 0 deletions
diff --git a/ui/messages/base.go b/ui/messages/base.go
new file mode 100644
index 0000000..aed7903
--- /dev/null
+++ b/ui/messages/base.go
@@ -0,0 +1,234 @@
+// 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 messages
+
+import (
+	"encoding/gob"
+	"time"
+
+	"maunium.net/go/gomuks/interface"
+	"maunium.net/go/gomuks/ui/messages/tstring"
+	"maunium.net/go/gomuks/ui/widget"
+	"maunium.net/go/tcell"
+)
+
+func init() {
+	gob.Register(&BaseMessage{})
+}
+
+type BaseMessage struct {
+	MsgID           string
+	MsgType         string
+	MsgSender       string
+	MsgSenderColor  tcell.Color
+	MsgTimestamp    time.Time
+	MsgState        ifc.MessageState
+	MsgIsHighlight  bool
+	MsgIsService    bool
+	buffer          []tstring.TString
+	prevBufferWidth int
+}
+
+func newBaseMessage(id, sender, msgtype string, timestamp time.Time) BaseMessage {
+	return BaseMessage{
+		MsgSender:       sender,
+		MsgTimestamp:    timestamp,
+		MsgSenderColor:  widget.GetHashColor(sender),
+		MsgType:         msgtype,
+		MsgID:           id,
+		prevBufferWidth: 0,
+		MsgState:        ifc.MessageStateDefault,
+		MsgIsHighlight:  false,
+		MsgIsService:    false,
+	}
+}
+
+func (msg *BaseMessage) RegisterGomuks(gmx ifc.Gomuks) {}
+
+// CopyFrom replaces the content of this message object with the content of the given object.
+func (msg *BaseMessage) CopyFrom(from ifc.MessageMeta) {
+	msg.MsgSender = from.Sender()
+	msg.MsgSenderColor = from.SenderColor()
+
+	fromMsg, ok := from.(UIMessage)
+	if ok {
+		msg.MsgSender = fromMsg.RealSender()
+		msg.MsgID = fromMsg.ID()
+		msg.MsgType = fromMsg.Type()
+		msg.MsgTimestamp = fromMsg.Timestamp()
+		msg.MsgState = fromMsg.State()
+		msg.MsgIsService = fromMsg.IsService()
+		msg.MsgIsHighlight = fromMsg.IsHighlight()
+		msg.buffer = nil
+	}
+}
+
+// Sender gets the string that should be displayed as the sender of this message.
+//
+// If the message is being sent, the sender is "Sending...".
+// If sending has failed, the sender is "Error".
+// If the message is an emote, the sender is blank.
+// In any other case, the sender is the display name of the user who sent the message.
+func (msg *BaseMessage) Sender() string {
+	switch msg.MsgState {
+	case ifc.MessageStateSending:
+		return "Sending..."
+	case ifc.MessageStateFailed:
+		return "Error"
+	}
+	switch msg.MsgType {
+	case "m.emote":
+		// Emotes don't show a separate sender, it's included in the buffer.
+		return ""
+	default:
+		return msg.MsgSender
+	}
+}
+
+func (msg *BaseMessage) RealSender() string {
+	return msg.MsgSender
+}
+
+func (msg *BaseMessage) getStateSpecificColor() tcell.Color {
+	switch msg.MsgState {
+	case ifc.MessageStateSending:
+		return tcell.ColorGray
+	case ifc.MessageStateFailed:
+		return tcell.ColorRed
+	case ifc.MessageStateDefault:
+		fallthrough
+	default:
+		return tcell.ColorDefault
+	}
+}
+
+// SenderColor returns the color the name of the sender should be shown in.
+//
+// If the message is being sent, the color is gray.
+// If sending has failed, the color is red.
+//
+// In any other case, the color is whatever is specified in the Message struct.
+// Usually that means it is the hash-based color of the sender (see ui/widget/color.go)
+func (msg *BaseMessage) SenderColor() tcell.Color {
+	stateColor := msg.getStateSpecificColor()
+	switch {
+	case stateColor != tcell.ColorDefault:
+		return stateColor
+	case msg.MsgIsService:
+		return tcell.ColorGray
+	default:
+		return msg.MsgSenderColor
+	}
+}
+
+// TextColor returns the color the actual content of the message should be shown in.
+func (msg *BaseMessage) TextColor() tcell.Color {
+	stateColor := msg.getStateSpecificColor()
+	switch {
+	case stateColor != tcell.ColorDefault:
+		return stateColor
+	case msg.MsgIsService, msg.MsgType == "m.notice":
+		return tcell.ColorGray
+	case msg.MsgIsHighlight:
+		return tcell.ColorYellow
+	case msg.MsgType == "m.room.member":
+		return tcell.ColorGreen
+	default:
+		return tcell.ColorDefault
+	}
+}
+
+// TimestampColor returns the color the timestamp should be shown in.
+//
+// As with SenderColor(), messages being sent and messages that failed to be sent are
+// gray and red respectively.
+//
+// However, other messages are the default color instead of a color stored in the struct.
+func (msg *BaseMessage) TimestampColor() tcell.Color {
+	return msg.getStateSpecificColor()
+}
+
+// Buffer returns the computed text buffer.
+//
+// The buffer contains the text of the message split into lines with a maximum
+// width of whatever was provided to CalculateBuffer().
+//
+// N.B. This will NOT automatically calculate the buffer if it hasn't been
+//      calculated already, as that requires the target width.
+func (msg *BaseMessage) Buffer() []tstring.TString {
+	return msg.buffer
+}
+
+// Height returns the number of rows in the computed buffer (see Buffer()).
+func (msg *BaseMessage) Height() int {
+	return len(msg.buffer)
+}
+
+// Timestamp returns the full timestamp when the message was sent.
+func (msg *BaseMessage) Timestamp() time.Time {
+	return msg.MsgTimestamp
+}
+
+// FormatTime returns the formatted time when the message was sent.
+func (msg *BaseMessage) FormatTime() string {
+	return msg.MsgTimestamp.Format(TimeFormat)
+}
+
+// FormatDate returns the formatted date when the message was sent.
+func (msg *BaseMessage) FormatDate() string {
+	return msg.MsgTimestamp.Format(DateFormat)
+}
+
+func (msg *BaseMessage) ID() string {
+	return msg.MsgID
+}
+
+func (msg *BaseMessage) SetID(id string) {
+	msg.MsgID = id
+}
+
+func (msg *BaseMessage) Type() string {
+	return msg.MsgType
+}
+
+func (msg *BaseMessage) SetType(msgtype string) {
+	msg.MsgType = msgtype
+}
+
+func (msg *BaseMessage) State() ifc.MessageState {
+	return msg.MsgState
+}
+
+func (msg *BaseMessage) SetState(state ifc.MessageState) {
+	msg.MsgState = state
+}
+
+func (msg *BaseMessage) IsHighlight() bool {
+	return msg.MsgIsHighlight
+}
+
+func (msg *BaseMessage) SetIsHighlight(isHighlight bool) {
+	msg.MsgIsHighlight = isHighlight
+}
+
+func (msg *BaseMessage) IsService() bool {
+	return msg.MsgIsService
+}
+
+func (msg *BaseMessage) SetIsService(isService bool) {
+	msg.MsgIsService = isService
+}
diff --git a/ui/messages/doc.go b/ui/messages/doc.go
new file mode 100644
index 0000000..289c308
--- /dev/null
+++ b/ui/messages/doc.go
@@ -0,0 +1,2 @@
+// Package messages contains different message types and code to generate and render them.
+package messages
diff --git a/ui/messages/expandedtextmessage.go b/ui/messages/expandedtextmessage.go
new file mode 100644
index 0000000..3ee15ad
--- /dev/null
+++ b/ui/messages/expandedtextmessage.go
@@ -0,0 +1,71 @@
+// 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 messages
+
+import (
+	"encoding/gob"
+	"time"
+
+	"maunium.net/go/gomuks/interface"
+	"maunium.net/go/gomuks/ui/messages/tstring"
+)
+
+func init() {
+	gob.Register(&ExpandedTextMessage{})
+}
+
+type ExpandedTextMessage struct {
+	BaseTextMessage
+	MsgText tstring.TString
+}
+
+// NewExpandedTextMessage creates a new ExpandedTextMessage object with the provided values and the default state.
+func NewExpandedTextMessage(id, sender, msgtype string, text tstring.TString, timestamp time.Time) UIMessage {
+	return &ExpandedTextMessage{
+		BaseTextMessage: newBaseTextMessage(id, sender, msgtype, timestamp),
+		MsgText: text,
+	}
+}
+
+func (msg *ExpandedTextMessage) GenerateText() tstring.TString {
+	return msg.MsgText
+}
+
+// CopyFrom replaces the content of this message object with the content of the given object.
+func (msg *ExpandedTextMessage) CopyFrom(from ifc.MessageMeta) {
+	msg.BaseTextMessage.CopyFrom(from)
+
+	fromExpandedMsg, ok := from.(*ExpandedTextMessage)
+	if ok {
+		msg.MsgText = fromExpandedMsg.MsgText
+	}
+
+	msg.RecalculateBuffer()
+}
+
+func (msg *ExpandedTextMessage) NotificationContent() string {
+	return msg.MsgText.String()
+}
+
+func (msg *ExpandedTextMessage) CalculateBuffer(width int) {
+	msg.BaseTextMessage.calculateBufferWithText(msg.MsgText, width)
+}
+
+// RecalculateBuffer calculates the buffer again with the previously provided width.
+func (msg *ExpandedTextMessage) RecalculateBuffer() {
+	msg.CalculateBuffer(msg.prevBufferWidth)
+}
diff --git a/ui/messages/imagemessage.go b/ui/messages/imagemessage.go
new file mode 100644
index 0000000..2fbf6ae
--- /dev/null
+++ b/ui/messages/imagemessage.go
@@ -0,0 +1,123 @@
+// 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 messages
+
+import (
+	"bytes"
+	"encoding/gob"
+	"fmt"
+	"time"
+
+	"image/color"
+
+	"maunium.net/go/gomuks/debug"
+	"maunium.net/go/gomuks/interface"
+	"maunium.net/go/gomuks/lib/ansimage"
+	"maunium.net/go/gomuks/ui/messages/tstring"
+	"maunium.net/go/tcell"
+)
+
+func init() {
+	gob.Register(&ImageMessage{})
+}
+
+type ImageMessage struct {
+	BaseMessage
+	Homeserver string
+	FileID     string
+	data       []byte
+
+	gmx ifc.Gomuks
+}
+
+// NewImageMessage creates a new ImageMessage object with the provided values and the default state.
+func NewImageMessage(gmx ifc.Gomuks, id, sender, msgtype, homeserver, fileID string, data []byte, timestamp time.Time) UIMessage {
+	return &ImageMessage{
+		newBaseMessage(id, sender, msgtype, timestamp),
+		homeserver,
+		fileID,
+		data,
+		gmx,
+	}
+}
+
+func (msg *ImageMessage) RegisterGomuks(gmx ifc.Gomuks) {
+	msg.gmx = gmx
+
+	debug.Print(len(msg.data), msg.data)
+	if len(msg.data) == 0 {
+		go func() {
+			defer gmx.Recover()
+			msg.updateData()
+		}()
+	}
+}
+
+func (msg *ImageMessage) NotificationContent() string {
+	return "Sent an image"
+}
+
+func (msg *ImageMessage) updateData() {
+	debug.Print("Loading image:", msg.Homeserver, msg.FileID)
+	data, _, _, err := msg.gmx.Matrix().Download(fmt.Sprintf("mxc://%s/%s", msg.Homeserver, msg.FileID))
+	if err != nil {
+		debug.Print("Failed to download image %s/%s: %v", msg.Homeserver, msg.FileID, err)
+		return
+	}
+	msg.data = data
+}
+
+func (msg *ImageMessage) Path() string {
+	return msg.gmx.Matrix().GetCachePath(msg.Homeserver, msg.FileID)
+}
+
+// CopyFrom replaces the content of this message object with the content of the given object.
+func (msg *ImageMessage) CopyFrom(from ifc.MessageMeta) {
+	msg.BaseMessage.CopyFrom(from)
+
+	fromImgMsg, ok := from.(*ImageMessage)
+	if ok {
+		msg.data = fromImgMsg.data
+	}
+
+	msg.RecalculateBuffer()
+}
+
+// CalculateBuffer generates the internal buffer for this message that consists
+// of the text of this message split into lines at most as wide as the width
+// parameter.
+func (msg *ImageMessage) CalculateBuffer(width int) {
+	if width < 2 {
+		return
+	}
+
+	image, err := ansimage.NewScaledFromReader(bytes.NewReader(msg.data), 0, width, color.Black)
+	if err != nil {
+		msg.buffer = []tstring.TString{tstring.NewColorTString("Failed to display image", tcell.ColorRed)}
+		debug.Print("Failed to display image:", err)
+		return
+	}
+
+	msg.buffer = image.Render()
+	msg.prevBufferWidth = width
+}
+
+// RecalculateBuffer calculates the buffer again with the previously provided width.
+func (msg *ImageMessage) RecalculateBuffer() {
+	msg.CalculateBuffer(msg.prevBufferWidth)
+}
+
diff --git a/ui/messages/message.go b/ui/messages/message.go
new file mode 100644
index 0000000..6ebfb6d
--- /dev/null
+++ b/ui/messages/message.go
@@ -0,0 +1,38 @@
+// 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 messages
+
+import (
+	"maunium.net/go/gomuks/interface"
+	"maunium.net/go/gomuks/ui/messages/tstring"
+)
+
+// Message is a wrapper for the content and metadata of a Matrix message intended to be displayed.
+type UIMessage interface {
+	ifc.Message
+
+	CalculateBuffer(width int)
+	RecalculateBuffer()
+	Buffer() []tstring.TString
+	Height() int
+
+	RealSender() string
+	RegisterGomuks(gmx ifc.Gomuks)
+}
+
+const DateFormat = "January _2, 2006"
+const TimeFormat = "15:04:05"
diff --git a/ui/messages/meta.go b/ui/messages/meta.go
new file mode 100644
index 0000000..7e2f29f
--- /dev/null
+++ b/ui/messages/meta.go
@@ -0,0 +1,77 @@
+// 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 messages
+
+import (
+	"time"
+
+	"maunium.net/go/tcell"
+	"maunium.net/go/gomuks/interface"
+)
+
+// BasicMeta is a simple variable store implementation of MessageMeta.
+type BasicMeta struct {
+	BSender string
+	BTimestamp time.Time
+	BSenderColor, BTextColor, BTimestampColor tcell.Color
+}
+
+// Sender gets the string that should be displayed as the sender of this message.
+func (meta *BasicMeta) Sender() string {
+	return meta.BSender
+}
+
+// SenderColor returns the color the name of the sender should be shown in.
+func (meta *BasicMeta) SenderColor() tcell.Color {
+	return meta.BSenderColor
+}
+
+// Timestamp returns the full time when the message was sent.
+func (meta *BasicMeta) Timestamp() time.Time {
+	return meta.BTimestamp
+}
+
+// FormatTime returns the formatted time when the message was sent.
+func (meta *BasicMeta) FormatTime() string {
+	return meta.BTimestamp.Format(TimeFormat)
+}
+
+// FormatDate returns the formatted date when the message was sent.
+func (meta *BasicMeta) FormatDate() string {
+	return meta.BTimestamp.Format(DateFormat)
+}
+
+// TextColor returns the color the actual content of the message should be shown in.
+func (meta *BasicMeta) TextColor() tcell.Color {
+	return meta.BTextColor
+}
+
+// TimestampColor returns the color the timestamp should be shown in.
+//
+// This usually does not apply to the date, as it is rendered separately from the message.
+func (meta *BasicMeta) TimestampColor() tcell.Color {
+	return meta.BTimestampColor
+}
+
+// CopyFrom replaces the content of this meta object with the content of the given object.
+func (meta *BasicMeta) CopyFrom(from ifc.MessageMeta) {
+	meta.BSender = from.Sender()
+	meta.BTimestamp = from.Timestamp()
+	meta.BSenderColor = from.SenderColor()
+	meta.BTextColor = from.TextColor()
+	meta.BTimestampColor = from.TimestampColor()
+}
diff --git a/ui/messages/parser/htmlparser.go b/ui/messages/parser/htmlparser.go
new file mode 100644
index 0000000..9ca707f
--- /dev/null
+++ b/ui/messages/parser/htmlparser.go
@@ -0,0 +1,186 @@
+// 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 parser
+
+import (
+	"fmt"
+	"io"
+	"math"
+	"regexp"
+	"strings"
+
+	"maunium.net/go/gomatrix"
+	"maunium.net/go/gomuks/debug"
+	"maunium.net/go/gomuks/lib/htmlparser"
+	"maunium.net/go/gomuks/matrix/rooms"
+	"maunium.net/go/gomuks/ui/messages/tstring"
+	"maunium.net/go/gomuks/ui/widget"
+	"maunium.net/go/tcell"
+)
+
+var matrixToURL = regexp.MustCompile("^(?:https?://)?(?:www\\.)?matrix\\.to/#/([#@!].*)")
+
+type MatrixHTMLProcessor struct {
+	text tstring.TString
+
+	indent    string
+	listType  string
+	lineIsNew bool
+	openTags  *TagArray
+
+	room *rooms.Room
+}
+
+func (parser *MatrixHTMLProcessor) newline() {
+	if !parser.lineIsNew {
+		parser.text = parser.text.Append("\n" + parser.indent)
+		parser.lineIsNew = true
+	}
+}
+
+func (parser *MatrixHTMLProcessor) Preprocess() {}
+
+func (parser *MatrixHTMLProcessor) HandleText(text string) {
+	style := tcell.StyleDefault
+	for _, tag := range *parser.openTags {
+		switch tag.Tag {
+		case "b", "strong":
+			style = style.Bold(true)
+		case "i", "em":
+			style = style.Italic(true)
+		case "s", "del":
+			style = style.Strikethrough(true)
+		case "u", "ins":
+			style = style.Underline(true)
+		case "a":
+			tag.Text += text
+			return
+		}
+	}
+
+	if !parser.openTags.Has("pre", "code") {
+		text = strings.Replace(text, "\n", "", -1)
+	}
+	parser.text = parser.text.AppendStyle(text, style)
+	parser.lineIsNew = false
+}
+
+func (parser *MatrixHTMLProcessor) HandleStartTag(tagName string, attrs map[string]string) {
+	tag := &TagWithMeta{Tag: tagName}
+	switch tag.Tag {
+	case "h1", "h2", "h3", "h4", "h5", "h6":
+		length := int(tag.Tag[1] - '0')
+		parser.text = parser.text.Append(strings.Repeat("#", length) + " ")
+		parser.lineIsNew = false
+	case "a":
+		tag.Meta, _ = attrs["href"]
+	case "ol", "ul":
+		parser.listType = tag.Tag
+	case "li":
+		indentSize := 2
+		if parser.listType == "ol" {
+			list := parser.openTags.Get(parser.listType)
+			list.Counter++
+			parser.text = parser.text.Append(fmt.Sprintf("%d. ", list.Counter))
+			indentSize = int(math.Log10(float64(list.Counter))+1) + len(". ")
+		} else {
+			parser.text = parser.text.Append("* ")
+		}
+		parser.indent += strings.Repeat(" ", indentSize)
+		parser.lineIsNew = false
+	case "blockquote":
+		parser.indent += "> "
+		parser.text = parser.text.Append("> ")
+		parser.lineIsNew = false
+	}
+	parser.openTags.PushMeta(tag)
+}
+
+func (parser *MatrixHTMLProcessor) HandleSelfClosingTag(tagName string, attrs map[string]string) {
+	if tagName == "br" {
+		parser.newline()
+	}
+}
+
+func (parser *MatrixHTMLProcessor) HandleEndTag(tagName string) {
+	tag := parser.openTags.Pop(tagName)
+
+	switch tag.Tag {
+	case "li", "blockquote":
+		indentSize := 2
+		if tag.Tag == "li" && parser.listType == "ol" {
+			list := parser.openTags.Get(parser.listType)
+			indentSize = int(math.Log10(float64(list.Counter))+1) + len(". ")
+		}
+		if len(parser.indent) >= indentSize {
+			parser.indent = parser.indent[0 : len(parser.indent)-indentSize]
+		}
+		// TODO this newline is sometimes not good
+		parser.newline()
+	case "a":
+		match := matrixToURL.FindStringSubmatch(tag.Meta)
+		if len(match) == 2 {
+			pillTarget := match[1]
+			if pillTarget[0] == '@' {
+				if member := parser.room.GetMember(pillTarget); member != nil {
+					parser.text = parser.text.AppendColor(member.DisplayName, widget.GetHashColor(member.DisplayName))
+				} else {
+					parser.text = parser.text.Append(pillTarget)
+				}
+			} else {
+				parser.text = parser.text.Append(pillTarget)
+			}
+		} else {
+			// TODO make text clickable rather than printing URL
+			parser.text = parser.text.Append(fmt.Sprintf("%s (%s)", tag.Text, tag.Meta))
+		}
+		parser.lineIsNew = false
+	case "p", "pre", "ol", "ul", "h1", "h2", "h3", "h4", "h5", "h6", "div":
+		// parser.newline()
+	}
+}
+
+func (parser *MatrixHTMLProcessor) ReceiveError(err error) {
+	if err != io.EOF {
+		debug.Print("Unexpected error parsing HTML:", err)
+	}
+}
+
+func (parser *MatrixHTMLProcessor) Postprocess() {
+	if len(parser.text) > 0 && parser.text[len(parser.text)-1].Char == '\n' {
+		parser.text = parser.text[:len(parser.text)-1]
+	}
+}
+
+// ParseHTMLMessage parses a HTML-formatted Matrix event into a UIMessage.
+func ParseHTMLMessage(room *rooms.Room, evt *gomatrix.Event) tstring.TString {
+	htmlData, _ := evt.Content["formatted_body"].(string)
+
+	processor := &MatrixHTMLProcessor{
+		room:      room,
+		text:      tstring.NewBlankTString(),
+		indent:    "",
+		listType:  "",
+		lineIsNew: true,
+		openTags:  &TagArray{},
+	}
+
+	parser := htmlparser.NewHTMLParserFromString(htmlData, processor)
+	parser.Process()
+
+	return processor.text
+}
diff --git a/ui/messages/parser/htmltagarray.go b/ui/messages/parser/htmltagarray.go
new file mode 100644
index 0000000..4cd4245
--- /dev/null
+++ b/ui/messages/parser/htmltagarray.go
@@ -0,0 +1,118 @@
+// 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 parser
+
+// TagWithMeta is an open HTML tag with some metadata (e.g. list index, a href value).
+type TagWithMeta struct {
+	Tag     string
+	Counter int
+	Meta    string
+	Text    string
+}
+
+// BlankTag is a blank TagWithMeta object.
+var BlankTag = &TagWithMeta{}
+
+// TagArray is a reversed queue for remembering what HTML tags are open.
+type TagArray []*TagWithMeta
+
+// Pushb converts the given byte array into a string and calls Push().
+func (ta *TagArray) Pushb(tag []byte) {
+	ta.Push(string(tag))
+}
+
+// Popb converts the given byte array into a string and calls Pop().
+func (ta *TagArray) Popb(tag []byte) *TagWithMeta {
+	return ta.Pop(string(tag))
+}
+
+// Indexb converts the given byte array into a string and calls Index().
+func (ta *TagArray) Indexb(tag []byte) {
+	ta.Index(string(tag))
+}
+
+// IndexAfterb converts the given byte array into a string and calls IndexAfter().
+func (ta *TagArray) IndexAfterb(tag []byte, after int) {
+	ta.IndexAfter(string(tag), after)
+}
+
+// Push adds the given tag to the array.
+func (ta *TagArray) Push(tag string) {
+	ta.PushMeta(&TagWithMeta{Tag: tag})
+}
+
+// Push adds the given tag to the array.
+func (ta *TagArray) PushMeta(tag *TagWithMeta) {
+	*ta = append(*ta, BlankTag)
+	copy((*ta)[1:], *ta)
+	(*ta)[0] = tag
+}
+
+// Pop removes the given tag from the array.
+func (ta *TagArray) Pop(tag string) (removed *TagWithMeta) {
+	if (*ta)[0].Tag == tag {
+		// This is the default case and is lighter than append(), so we handle it separately.
+		removed = (*ta)[0]
+		*ta = (*ta)[1:]
+	} else if index := ta.Index(tag); index != -1 {
+		removed = (*ta)[index]
+		*ta = append((*ta)[:index], (*ta)[index+1:]...)
+	}
+	return
+}
+
+// Index returns the first index where the given tag is, or -1 if it's not in the list.
+func (ta *TagArray) Index(tag string) int {
+	return ta.IndexAfter(tag, -1)
+}
+
+// IndexAfter returns the first index after the given index where the given tag is,
+// or -1 if the given tag is not on the list after the given index.
+func (ta *TagArray) IndexAfter(tag string, after int) int {
+	for i := after + 1; i < len(*ta); i++ {
+		if (*ta)[i].Tag == tag {
+			return i
+		}
+	}
+	return -1
+}
+
+// Get returns the first occurrence of the given tag, or nil if it's not in the list.
+func (ta *TagArray) Get(tag string) *TagWithMeta {
+	return ta.GetAfter(tag, -1)
+}
+
+// IndexAfter returns the first occurrence of the given tag, or nil if the given
+// tag is not on the list after the given index.
+func (ta *TagArray) GetAfter(tag string, after int) *TagWithMeta {
+	for i := after + 1; i < len(*ta); i++ {
+		if (*ta)[i].Tag == tag {
+			return (*ta)[i]
+		}
+	}
+	return nil
+}
+
+// Has returns whether or not the list has at least one of the given tags.
+func (ta *TagArray) Has(tags ...string) bool {
+	for _, tag := range tags {
+		if index := ta.Index(tag); index != -1 {
+			return true
+		}
+	}
+	return false
+}
diff --git a/ui/messages/parser/parser.go b/ui/messages/parser/parser.go
new file mode 100644
index 0000000..939dd10
--- /dev/null
+++ b/ui/messages/parser/parser.go
@@ -0,0 +1,128 @@
+// 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 parser
+
+import (
+	"fmt"
+	"time"
+
+	"maunium.net/go/gomatrix"
+	"maunium.net/go/gomuks/debug"
+	"maunium.net/go/gomuks/interface"
+	"maunium.net/go/gomuks/matrix/rooms"
+	"maunium.net/go/gomuks/ui/messages"
+	"maunium.net/go/gomuks/ui/messages/tstring"
+	"maunium.net/go/gomuks/ui/widget"
+	"maunium.net/go/tcell"
+)
+
+func ParseEvent(gmx ifc.Gomuks, room *rooms.Room, evt *gomatrix.Event) messages.UIMessage {
+	member := room.GetMember(evt.Sender)
+	if member != nil {
+		evt.Sender = member.DisplayName
+	}
+	switch evt.Type {
+	case "m.room.message":
+		return ParseMessage(gmx, room, evt)
+	case "m.room.member":
+		return ParseMembershipEvent(evt)
+	}
+	return nil
+}
+
+func unixToTime(unix int64) time.Time {
+	timestamp := time.Now()
+	if unix != 0 {
+		timestamp = time.Unix(unix/1000, unix%1000*1000)
+	}
+	return timestamp
+}
+
+func ParseMessage(gmx ifc.Gomuks, room *rooms.Room, evt *gomatrix.Event) messages.UIMessage {
+	msgtype, _ := evt.Content["msgtype"].(string)
+	ts := unixToTime(evt.Timestamp)
+	switch msgtype {
+	case "m.text", "m.notice", "m.emote":
+		format, hasFormat := evt.Content["format"].(string)
+		if hasFormat && format == "org.matrix.custom.html" {
+			text := ParseHTMLMessage(room, evt)
+			return messages.NewExpandedTextMessage(evt.ID, evt.Sender, msgtype, text, ts)
+		} else {
+			text, _ := evt.Content["body"].(string)
+			return messages.NewTextMessage(evt.ID, evt.Sender, msgtype, text, ts)
+		}
+	case "m.image":
+		url, _ := evt.Content["url"].(string)
+		data, hs, id, err := gmx.Matrix().Download(url)
+		if err != nil {
+			debug.Printf("Failed to download %s: %v", url, err)
+		}
+		return messages.NewImageMessage(gmx, evt.ID, evt.Sender, msgtype, hs, id, data, ts)
+	}
+	return nil
+}
+
+func getMembershipEventContent(evt *gomatrix.Event) (sender string, text tstring.TString) {
+	membership, _ := evt.Content["membership"].(string)
+	displayname, _ := evt.Content["displayname"].(string)
+	if len(displayname) == 0 {
+		displayname = *evt.StateKey
+	}
+	prevMembership := "leave"
+	prevDisplayname := ""
+	if evt.Unsigned.PrevContent != nil {
+		prevMembership, _ = evt.Unsigned.PrevContent["membership"].(string)
+		prevDisplayname, _ = evt.Unsigned.PrevContent["displayname"].(string)
+	}
+
+	if membership != prevMembership {
+		switch membership {
+		case "invite":
+			sender = "---"
+			text = tstring.NewColorTString(fmt.Sprintf("%s invited %s.", evt.Sender, displayname), tcell.ColorGreen)
+			text.Colorize(0, len(evt.Sender), widget.GetHashColor(evt.Sender))
+			text.Colorize(len(evt.Sender)+len(" invited "), len(displayname), widget.GetHashColor(displayname))
+		case "join":
+			sender = "-->"
+			text = tstring.NewColorTString(fmt.Sprintf("%s joined the room.", displayname), tcell.ColorGreen)
+			text.Colorize(0, len(displayname), widget.GetHashColor(displayname))
+		case "leave":
+			sender = "<--"
+			if evt.Sender != *evt.StateKey {
+				reason, _ := evt.Content["reason"].(string)
+				text = tstring.NewColorTString(fmt.Sprintf("%s kicked %s: %s", evt.Sender, displayname, reason), tcell.ColorRed)
+				text.Colorize(0, len(evt.Sender), widget.GetHashColor(evt.Sender))
+				text.Colorize(len(evt.Sender)+len(" kicked "), len(displayname), widget.GetHashColor(displayname))
+			} else {
+				text = tstring.NewColorTString(fmt.Sprintf("%s left the room.", displayname), tcell.ColorRed)
+				text.Colorize(0, len(displayname), widget.GetHashColor(displayname))
+			}
+		}
+	} else if displayname != prevDisplayname {
+		sender = "---"
+		text = tstring.NewColorTString(fmt.Sprintf("%s changed their display name to %s.", prevDisplayname, displayname), tcell.ColorYellow)
+		text.Colorize(0, len(prevDisplayname), widget.GetHashColor(prevDisplayname))
+		text.Colorize(len(prevDisplayname)+len(" changed their display name to "), len(displayname), widget.GetHashColor(displayname))
+	}
+	return
+}
+
+func ParseMembershipEvent(evt *gomatrix.Event) messages.UIMessage {
+	sender, text := getMembershipEventContent(evt)
+	ts := unixToTime(evt.Timestamp)
+	return messages.NewExpandedTextMessage(evt.ID, sender, "m.room.membership", text, ts)
+}
diff --git a/ui/messages/textbase.go b/ui/messages/textbase.go
new file mode 100644
index 0000000..d7eb16c
--- /dev/null
+++ b/ui/messages/textbase.go
@@ -0,0 +1,84 @@
+// 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 messages
+
+import (
+	"encoding/gob"
+	"regexp"
+	"time"
+
+	"maunium.net/go/gomuks/ui/messages/tstring"
+)
+
+func init() {
+	gob.Register(BaseTextMessage{})
+}
+
+type BaseTextMessage struct {
+	BaseMessage
+}
+
+func newBaseTextMessage(id, sender, msgtype string, timestamp time.Time) BaseTextMessage {
+	return BaseTextMessage{newBaseMessage(id, sender, msgtype, timestamp)}
+}
+
+// Regular expressions used to split lines when calculating the buffer.
+//
+// From tview/textview.go
+var (
+	boundaryPattern = regexp.MustCompile("([[:punct:]]\\s*|\\s+)")
+	spacePattern    = regexp.MustCompile(`\s+`)
+)
+
+// CalculateBuffer generates the internal buffer for this message that consists
+// of the text of this message split into lines at most as wide as the width
+// parameter.
+func (msg *BaseTextMessage) calculateBufferWithText(text tstring.TString, width int) {
+	if width < 2 {
+		return
+	}
+
+	msg.buffer = []tstring.TString{}
+
+	forcedLinebreaks := text.Split('\n')
+	newlines := 0
+	for _, str := range forcedLinebreaks {
+		if len(str) == 0 && newlines < 1 {
+			msg.buffer = append(msg.buffer, tstring.TString{})
+			newlines++
+		} else {
+			newlines = 0
+		}
+		// Mostly from tview/textview.go#reindexBuffer()
+		for len(str) > 0 {
+			extract := str.Truncate(width)
+			if len(extract) < len(str) {
+				if spaces := spacePattern.FindStringIndex(str[len(extract):].String()); spaces != nil && spaces[0] == 0 {
+					extract = str[:len(extract)+spaces[1]]
+				}
+
+				matches := boundaryPattern.FindAllStringIndex(extract.String(), -1)
+				if len(matches) > 0 {
+					extract = extract[:matches[len(matches)-1][1]]
+				}
+			}
+			msg.buffer = append(msg.buffer, extract)
+			str = str[len(extract):]
+		}
+	}
+	msg.prevBufferWidth = width
+}
diff --git a/ui/messages/textmessage.go b/ui/messages/textmessage.go
new file mode 100644
index 0000000..4c99e5b
--- /dev/null
+++ b/ui/messages/textmessage.go
@@ -0,0 +1,102 @@
+// 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 messages
+
+import (
+	"encoding/gob"
+	"fmt"
+	"time"
+
+	"maunium.net/go/gomuks/interface"
+	"maunium.net/go/gomuks/ui/messages/tstring"
+)
+
+func init() {
+	gob.Register(&TextMessage{})
+}
+
+type TextMessage struct {
+	BaseTextMessage
+	cache   tstring.TString
+	MsgText string
+}
+
+// NewTextMessage creates a new UITextMessage object with the provided values and the default state.
+func NewTextMessage(id, sender, msgtype, text string, timestamp time.Time) UIMessage {
+	return &TextMessage{
+		BaseTextMessage: newBaseTextMessage(id, sender, msgtype, timestamp),
+		MsgText:         text,
+	}
+}
+
+func (msg *TextMessage) getCache() tstring.TString {
+	if msg.cache == nil {
+		switch msg.MsgType {
+		case "m.emote":
+			msg.cache = tstring.NewColorTString(fmt.Sprintf("* %s %s", msg.MsgSender, msg.MsgText), msg.TextColor())
+			msg.cache.Colorize(0, len(msg.MsgSender)+2, msg.SenderColor())
+		default:
+			msg.cache = tstring.NewColorTString(msg.MsgText, msg.TextColor())
+		}
+	}
+	return msg.cache
+}
+
+// CopyFrom replaces the content of this message object with the content of the given object.
+func (msg *TextMessage) CopyFrom(from ifc.MessageMeta) {
+	msg.BaseTextMessage.CopyFrom(from)
+
+	fromTextMsg, ok := from.(*TextMessage)
+	if ok {
+		msg.MsgText = fromTextMsg.MsgText
+	}
+
+	msg.cache = nil
+	msg.RecalculateBuffer()
+}
+func (msg *TextMessage) SetType(msgtype string) {
+	msg.BaseTextMessage.SetType(msgtype)
+	msg.cache = nil
+}
+
+func (msg *TextMessage) SetState(state ifc.MessageState) {
+	msg.BaseTextMessage.SetState(state)
+	msg.cache = nil
+}
+
+func (msg *TextMessage) SetIsHighlight(isHighlight bool) {
+	msg.BaseTextMessage.SetIsHighlight(isHighlight)
+	msg.cache = nil
+}
+
+func (msg *TextMessage) SetIsService(isService bool) {
+	msg.BaseTextMessage.SetIsService(isService)
+	msg.cache = nil
+}
+
+func (msg *TextMessage) NotificationContent() string {
+	return msg.MsgText
+}
+
+func (msg *TextMessage) CalculateBuffer(width int) {
+	msg.BaseTextMessage.calculateBufferWithText(msg.getCache(), width)
+}
+
+// RecalculateBuffer calculates the buffer again with the previously provided width.
+func (msg *TextMessage) RecalculateBuffer() {
+	msg.CalculateBuffer(msg.prevBufferWidth)
+}
diff --git a/ui/messages/tstring/cell.go b/ui/messages/tstring/cell.go
new file mode 100644
index 0000000..8a400ee
--- /dev/null
+++ b/ui/messages/tstring/cell.go
@@ -0,0 +1,51 @@
+// 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 tstring
+
+import (
+	"maunium.net/go/tcell"
+	"github.com/mattn/go-runewidth"
+)
+
+type Cell struct {
+	Char  rune
+	Style tcell.Style
+}
+
+func NewStyleCell(char rune, style tcell.Style) Cell {
+	return Cell{char, style}
+}
+
+func NewColorCell(char rune, color tcell.Color) Cell {
+	return Cell{char, tcell.StyleDefault.Foreground(color)}
+}
+
+func NewCell(char rune) Cell {
+	return Cell{char, tcell.StyleDefault}
+}
+
+func (cell Cell) RuneWidth() int {
+	return runewidth.RuneWidth(cell.Char)
+}
+
+func (cell Cell) Draw(screen tcell.Screen, x, y int) (chWidth int) {
+	chWidth = cell.RuneWidth()
+	for runeWidthOffset := 0; runeWidthOffset < chWidth; runeWidthOffset++ {
+		screen.SetContent(x+runeWidthOffset, y, cell.Char, nil, cell.Style)
+	}
+	return
+}
diff --git a/ui/messages/tstring/string.go b/ui/messages/tstring/string.go
new file mode 100644
index 0000000..a87d16a
--- /dev/null
+++ b/ui/messages/tstring/string.go
@@ -0,0 +1,173 @@
+// 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 tstring
+
+import (
+	"strings"
+
+	"github.com/mattn/go-runewidth"
+	"maunium.net/go/tcell"
+)
+
+type TString []Cell
+
+func NewBlankTString() TString {
+	return make([]Cell, 0)
+}
+
+func NewTString(str string) TString {
+	newStr := make([]Cell, len(str))
+	for i, char := range str {
+		newStr[i] = NewCell(char)
+	}
+	return newStr
+}
+
+func NewColorTString(str string, color tcell.Color) TString {
+	newStr := make([]Cell, len(str))
+	for i, char := range str {
+		newStr[i] = NewColorCell(char, color)
+	}
+	return newStr
+}
+
+func NewStyleTString(str string, style tcell.Style) TString {
+	newStr := make([]Cell, len(str))
+	for i, char := range str {
+		newStr[i] = NewStyleCell(char, style)
+	}
+	return newStr
+}
+
+func (str TString) AppendTString(data TString) TString {
+	return append(str, data...)
+}
+
+func (str TString) Append(data string) TString {
+	newStr := make(TString, len(str)+len(data))
+	copy(newStr, str)
+	for i, char := range data {
+		newStr[i+len(str)] = NewCell(char)
+	}
+	return newStr
+}
+
+func (str TString) AppendColor(data string, color tcell.Color) TString {
+	newStr := make(TString, len(str)+len(data))
+	copy(newStr, str)
+	for i, char := range data {
+		newStr[i+len(str)] = NewColorCell(char, color)
+	}
+	return newStr
+}
+
+func (str TString) AppendStyle(data string, style tcell.Style) TString {
+	newStr := make(TString, len(str)+len(data))
+	copy(newStr, str)
+	for i, char := range data {
+		newStr[i+len(str)] = NewStyleCell(char, style)
+	}
+	return newStr
+}
+
+func (str TString) Colorize(from, length int, color tcell.Color) {
+	for i := from; i < from+length; i++ {
+		str[i].Style = str[i].Style.Foreground(color)
+	}
+}
+
+func (str TString) Draw(screen tcell.Screen, x, y int) {
+	offsetX := 0
+	for _, cell := range str {
+		offsetX += cell.Draw(screen, x+offsetX, y)
+	}
+}
+
+func (str TString) RuneWidth() (width int) {
+	for _, cell := range str {
+		width += runewidth.RuneWidth(cell.Char)
+	}
+	return width
+}
+
+func (str TString) String() string {
+	var buf strings.Builder
+	for _, cell := range str {
+		buf.WriteRune(cell.Char)
+	}
+	return buf.String()
+}
+
+// Truncate return string truncated with w cells
+func (str TString) Truncate(w int) TString {
+	if str.RuneWidth() <= w {
+		return str[:]
+	}
+	width := 0
+	i := 0
+	for ; i < len(str); i++ {
+		cw := runewidth.RuneWidth(str[i].Char)
+		if width+cw > w {
+			break
+		}
+		width += cw
+	}
+	return str[0:i]
+}
+
+func (str TString) IndexFrom(r rune, from int) int {
+	for i := from; i < len(str); i++ {
+		if str[i].Char == r {
+			return i
+		}
+	}
+	return -1
+}
+
+func (str TString) Index(r rune) int {
+	return str.IndexFrom(r, 0)
+}
+
+func (str TString) Count(r rune) (counter int) {
+	index := 0
+	for {
+		index = str.IndexFrom(r, index)
+		if index < 0 {
+			break
+		}
+		index++
+		counter++
+	}
+	return
+}
+
+func (str TString) Split(sep rune) []TString {
+	a := make([]TString, str.Count(sep)+1)
+	i := 0
+	orig := str
+	for {
+		m := orig.Index(sep)
+		if m < 0 {
+			break
+		}
+		a[i] = orig[:m]
+		orig = orig[m+1:]
+		i++
+	}
+	a[i] = orig
+	return a[:i+1]
+}