1 files changed, 47 insertions, 0 deletions
diff --git a/ui/widget/util.go b/ui/widget/util.go
new file mode 100644
index 0000000..5bde263
--- /dev/null
+++ b/ui/widget/util.go
@@ -0,0 +1,47 @@
+// gomuks - A terminal Matrix client written in Go.
+// Copyright (C) 2018 Tulir Asokan
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package widget
+
+import (
+	"github.com/gdamore/tcell"
+	"github.com/mattn/go-runewidth"
+	"maunium.net/go/tview"
+)
+
+func writeLine(screen tcell.Screen, align int, line string, x, y, maxWidth int, color tcell.Color) {
+	offsetX := 0
+	if align == tview.AlignRight {
+		offsetX = maxWidth - runewidth.StringWidth(line)
+	}
+	if offsetX < 0 {
+		offsetX = 0
+	}
+	for _, ch := range line {
+		chWidth := runewidth.RuneWidth(ch)
+		if chWidth == 0 {
+			continue
+		}
+
+		for localOffset := 0; localOffset < chWidth; localOffset++ {
+			screen.SetContent(x+offsetX+localOffset, y, ch, nil, tcell.StyleDefault.Foreground(color))
+		}
+		offsetX += chWidth
+		if offsetX > maxWidth {
+			break
+		}
+	}
+}