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// Copyright 2019-2022 Graham Clark. All rights reserved. Use of this source
// code is governed by the MIT license that can be found in the LICENSE
// file.
// Package divider provides a widget that draws a dividing line between other widgets.
package divider
import (
"fmt"
"runtime"
"github.com/gcla/gowid"
)
//======================================================================
var (
HorizontalLine = '━'
AltHorizontalLine = '▀'
)
func init() {
switch runtime.GOOS {
case "windows":
HorizontalLine = '─'
AltHorizontalLine = HorizontalLine
case "darwin":
AltHorizontalLine = HorizontalLine
}
}
type IDivider interface {
Opts() Options
}
type IWidget interface {
gowid.IWidget
IDivider
}
type Widget struct {
opts Options
gowid.RejectUserInput
gowid.NotSelectable
}
type Options struct {
Chr rune
Above, Below int
}
func New(opts ...Options) *Widget {
var opt Options
if len(opts) == 0 {
opt = Options{
Chr: '-',
}
} else {
opt = opts[0]
}
res := &Widget{
opts: opt,
}
var _ IWidget = res
return res
}
func NewAscii() *Widget {
return New(Options{
Chr: '-',
})
}
func NewBlank() *Widget {
return New(Options{
Chr: ' ',
})
}
func NewUnicode() *Widget {
return New(Options{
Chr: HorizontalLine,
})
}
func NewUnicodeAlt() *Widget {
return New(Options{
Chr: AltHorizontalLine,
})
}
func (w *Widget) String() string {
return fmt.Sprintf("div[%c]", w.Opts().Chr)
}
func (w *Widget) Opts() Options {
return w.opts
}
func (w *Widget) RenderSize(size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.IRenderBox {
return RenderSize(w, size, focus, app)
}
func (w *Widget) Render(size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.ICanvas {
return Render(w, size, focus, app)
}
//''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
func RenderSize(w IDivider, size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.IRenderBox {
if flow, ok := size.(gowid.IRenderFlowWith); !ok {
panic(gowid.WidgetSizeError{Widget: w, Size: size, Required: "gowid.IRenderFlowWith"})
} else {
return gowid.RenderBox{C: flow.FlowColumns(), R: w.Opts().Above + w.Opts().Below + 1}
}
}
func Render(w IDivider, size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.ICanvas {
flow, ok := size.(gowid.IRenderFlowWith)
if !ok {
panic(gowid.WidgetSizeError{Widget: w, Size: size, Required: "gowid.IRenderFlowWith"})
}
div := gowid.CellFromRune(w.Opts().Chr)
divArr := make([]gowid.Cell, flow.FlowColumns())
for i := 0; i < flow.FlowColumns(); i++ {
divArr[i] = div
}
res := gowid.NewCanvas()
for i := 0; i < w.Opts().Above; i++ {
res.AppendLine([]gowid.Cell{}, false)
}
res.AppendLine(divArr, false)
for i := 0; i < w.Opts().Below; i++ {
res.AppendLine([]gowid.Cell{}, false)
}
res.AlignRight()
return res
}
//======================================================================
// Local Variables:
// mode: Go
// fill-column: 110
// End:
|
