gomuks/ui/widget/util.go

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// gomuks - A terminal Matrix client written in Go.
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// Copyright (C) 2019 Tulir Asokan
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//
// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// 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
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package widget
import (
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"fmt"
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"github.com/mattn/go-runewidth"
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"maunium.net/go/tcell"
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"maunium.net/go/tview"
"strconv"
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)
func WriteLineSimple(screen tcell.Screen, line string, x, y int) {
WriteLine(screen, tview.AlignLeft, line, x, y, 1<<30, tcell.StyleDefault)
}
func WriteLineSimpleColor(screen tcell.Screen, line string, x, y int, color tcell.Color) {
WriteLine(screen, tview.AlignLeft, line, x, y, 1<<30, tcell.StyleDefault.Foreground(color))
}
func WriteLineColor(screen tcell.Screen, align int, line string, x, y, maxWidth int, color tcell.Color) {
WriteLine(screen, align, line, x, y, maxWidth, tcell.StyleDefault.Foreground(color))
}
func WriteLine(screen tcell.Screen, align int, line string, x, y, maxWidth int, style tcell.Style) {
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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, style)
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}
offsetX += chWidth
if offsetX > maxWidth {
break
}
}
}
func WriteLinePadded(screen tcell.Screen, align int, line string, x, y, maxWidth int, style tcell.Style) {
padding := strconv.Itoa(maxWidth)
if align == tview.AlignRight {
line = fmt.Sprintf("%"+padding+"s", line)
} else {
line = fmt.Sprintf("%-"+padding+"s", line)
}
WriteLine(screen, tview.AlignLeft, line, x, y, maxWidth, style)
}