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67 lines
1.3 KiB
67 lines
1.3 KiB
package view
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import (
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"fmt"
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"github.com/mediocregopher/ginger/gg"
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"github.com/mediocregopher/ginger/gim/geo"
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"github.com/mediocregopher/ginger/gim/terminal"
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)
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type box struct {
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topLeft geo.XY
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flowDir geo.XY
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numIn, numOut int
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bodyBuf *terminal.Buffer
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transparent bool
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}
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func boxFromVertex(v *gg.Vertex, flowDir geo.XY) box {
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b := box{
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flowDir: flowDir,
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numIn: len(v.In),
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numOut: len(v.Out),
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}
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if v.VertexType == gg.ValueVertex {
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b.bodyBuf = terminal.NewBuffer()
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b.bodyBuf.WriteString(v.Value.V.(string))
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}
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return b
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}
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func (b box) rect() geo.Rect {
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var bodyRect geo.Rect
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if b.bodyBuf != nil {
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bodyRect.Size = b.bodyBuf.Size().Add(geo.XY{2, 2})
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}
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var edgesRect geo.Rect
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{
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var neededByEdges int
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if b.numIn > b.numOut {
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neededByEdges = b.numIn*2 + 1
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} else {
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neededByEdges = b.numOut*2 + 1
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}
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switch b.flowDir {
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case geo.Left, geo.Right:
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edgesRect.Size = geo.XY{2, neededByEdges}
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case geo.Up, geo.Down:
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edgesRect.Size = geo.XY{neededByEdges, 2}
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default:
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panic(fmt.Sprintf("unknown flowDir: %#v", b.flowDir))
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}
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}
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return bodyRect.Union(edgesRect).Translate(b.topLeft)
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}
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func (b box) draw(buf *terminal.Buffer) {
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rect := b.rect()
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buf.DrawRect(rect, terminal.SingleLine)
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if b.bodyBuf != nil {
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buf.DrawBufferCentered(rect.Center(), b.bodyBuf)
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}
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}
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