From ee67c1446cbb3c446d59d4ebd9657a25bf0b702d Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Tue, 10 Apr 2018 16:07:16 +0300
Subject: Convert message buffer to use custom colorable strings

---
 ui/messages/message.go | 158 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 156 insertions(+), 2 deletions(-)

(limited to 'ui/messages/message.go')

diff --git a/ui/messages/message.go b/ui/messages/message.go
index ef0966c..f9ad1f7 100644
--- a/ui/messages/message.go
+++ b/ui/messages/message.go
@@ -16,7 +16,13 @@
 
 package messages
 
-import "maunium.net/go/gomuks/interface"
+import (
+	"strings"
+
+	"github.com/gdamore/tcell"
+	"github.com/mattn/go-runewidth"
+	"maunium.net/go/gomuks/interface"
+)
 
 // Message is a wrapper for the content and metadata of a Matrix message intended to be displayed.
 type UIMessage interface {
@@ -24,6 +30,154 @@ type UIMessage interface {
 
 	CalculateBuffer(width int)
 	RecalculateBuffer()
-	Buffer() []string
+	Buffer() []UIString
 	Height() int
+
+	RealSender() string
+}
+
+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
+}
+
+type UIString []Cell
+
+func NewUIString(str string) UIString {
+	newStr := make([]Cell, len(str))
+	for i, char := range str {
+		newStr[i] = NewCell(char)
+	}
+	return newStr
+}
+
+func NewColorUIString(str string, color tcell.Color) UIString {
+	newStr := make([]Cell, len(str))
+	for i, char := range str {
+		newStr[i] = NewColorCell(char, color)
+	}
+	return newStr
+}
+
+func NewStyleUIString(str string, style tcell.Style) UIString {
+	newStr := make([]Cell, len(str))
+	for i, char := range str {
+		newStr[i] = NewStyleCell(char, style)
+	}
+	return newStr
+}
+
+func (str UIString) Colorize(from, to int, color tcell.Color) {
+	for i := from; i < to; i++ {
+		str[i].Style = str[i].Style.Foreground(color)
+	}
+}
+
+func (str UIString) Draw(screen tcell.Screen, x, y int) {
+	offsetX := 0
+	for _, cell := range str {
+		offsetX += cell.Draw(screen, x+offsetX, y)
+	}
+}
+
+func (str UIString) RuneWidth() (width int) {
+	for _, cell := range str {
+		width += runewidth.RuneWidth(cell.Char)
+	}
+	return width
+}
+
+func (str UIString) 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 UIString) Truncate(w int) UIString {
+	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 UIString) IndexFrom(r rune, from int) int {
+	for i := from; i < len(str); i++ {
+		if str[i].Char == r {
+			return i
+		}
+	}
+	return -1
+}
+
+func (str UIString) Index(r rune) int {
+	return str.IndexFrom(r, 0)
 }
+
+func (str UIString) Count(r rune) (counter int) {
+	index := 0
+	for {
+		index = str.IndexFrom(r, index)
+		if index < 0 {
+			break
+		}
+		index++
+		counter++
+	}
+	return
+}
+
+func (str UIString) Split(sep rune) []UIString {
+	a := make([]UIString, 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]
+}
+
+const DateFormat = "January _2, 2006"
+const TimeFormat = "15:04:05"
-- 
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