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authorTulir Asokan <tulir@maunium.net>2018-04-14 18:09:02 +0300
committerGitHub <noreply@github.com>2018-04-14 18:09:02 +0300
commit53cdfb64c1773b63fb9432a1525b4ac4acb154fc (patch)
tree1c1aa180313abe8179d0b07591348e222b60483e /ui/messages
parent14a84295d72a24a8bce8a71c240ab2b155ed5a1f (diff)
parentd060d10615434c557373ee00ba009cc8b583e881 (diff)
Merge pull request #18 from tulir/ui-refactor
Refactor UI to use interfaces and add advanced message rendering
Diffstat (limited to 'ui/messages')
-rw-r--r--ui/messages/base.go234
-rw-r--r--ui/messages/doc.go2
-rw-r--r--ui/messages/expandedtextmessage.go71
-rw-r--r--ui/messages/imagemessage.go123
-rw-r--r--ui/messages/message.go38
-rw-r--r--ui/messages/meta.go77
-rw-r--r--ui/messages/parser/htmlparser.go186
-rw-r--r--ui/messages/parser/htmltagarray.go118
-rw-r--r--ui/messages/parser/parser.go128
-rw-r--r--ui/messages/textbase.go84
-rw-r--r--ui/messages/textmessage.go102
-rw-r--r--ui/messages/tstring/cell.go51
-rw-r--r--ui/messages/tstring/string.go173
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]
+}