From 8270bc0322ac262f4b48c92d5fad25cf9634f1bb Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Tue, 10 Apr 2018 19:31:28 +0300
Subject: Move event parsing to ui/messages and add image displaying

---
 ui/messages/string.go | 138 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 ui/messages/string.go

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

diff --git a/ui/messages/string.go b/ui/messages/string.go
new file mode 100644
index 0000000..7c3143b
--- /dev/null
+++ b/ui/messages/string.go
@@ -0,0 +1,138 @@
+// 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 (
+	"strings"
+
+	"github.com/gdamore/tcell"
+	"github.com/mattn/go-runewidth"
+)
+
+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, length int, color tcell.Color) {
+	for i := from; i < from+length; 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]
+}
-- 
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