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semigraphics.go
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semigraphics.go
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package tview
import "github.com/gdamore/tcell/v2"
// Semigraphics provides an easy way to access unicode characters for drawing.
//
// Named like the unicode characters, 'Semigraphics'-prefix used if unicode block
// isn't prefixed itself.
const (
// Block: General Punctuation U+2000-U+206F (http://unicode.org/charts/PDF/U2000.pdf)
SemigraphicsHorizontalEllipsis rune = '\u2026' // …
// Block: Box Drawing U+2500-U+257F (http://unicode.org/charts/PDF/U2500.pdf)
BoxDrawingsLightHorizontal rune = '\u2500' // ─
BoxDrawingsHeavyHorizontal rune = '\u2501' // ━
BoxDrawingsLightVertical rune = '\u2502' // │
BoxDrawingsHeavyVertical rune = '\u2503' // ┃
BoxDrawingsLightTripleDashHorizontal rune = '\u2504' // ┄
BoxDrawingsHeavyTripleDashHorizontal rune = '\u2505' // ┅
BoxDrawingsLightTripleDashVertical rune = '\u2506' // ┆
BoxDrawingsHeavyTripleDashVertical rune = '\u2507' // ┇
BoxDrawingsLightQuadrupleDashHorizontal rune = '\u2508' // ┈
BoxDrawingsHeavyQuadrupleDashHorizontal rune = '\u2509' // ┉
BoxDrawingsLightQuadrupleDashVertical rune = '\u250a' // ┊
BoxDrawingsHeavyQuadrupleDashVertical rune = '\u250b' // ┋
BoxDrawingsLightDownAndRight rune = '\u250c' // ┌
BoxDrawingsDownLightAndRightHeavy rune = '\u250d' // ┍
BoxDrawingsDownHeavyAndRightLight rune = '\u250e' // ┎
BoxDrawingsHeavyDownAndRight rune = '\u250f' // ┏
BoxDrawingsLightDownAndLeft rune = '\u2510' // ┐
BoxDrawingsDownLightAndLeftHeavy rune = '\u2511' // ┑
BoxDrawingsDownHeavyAndLeftLight rune = '\u2512' // ┒
BoxDrawingsHeavyDownAndLeft rune = '\u2513' // ┓
BoxDrawingsLightUpAndRight rune = '\u2514' // └
BoxDrawingsUpLightAndRightHeavy rune = '\u2515' // ┕
BoxDrawingsUpHeavyAndRightLight rune = '\u2516' // ┖
BoxDrawingsHeavyUpAndRight rune = '\u2517' // ┗
BoxDrawingsLightUpAndLeft rune = '\u2518' // ┘
BoxDrawingsUpLightAndLeftHeavy rune = '\u2519' // ┙
BoxDrawingsUpHeavyAndLeftLight rune = '\u251a' // ┚
BoxDrawingsHeavyUpAndLeft rune = '\u251b' // ┛
BoxDrawingsLightVerticalAndRight rune = '\u251c' // ├
BoxDrawingsVerticalLightAndRightHeavy rune = '\u251d' // ┝
BoxDrawingsUpHeavyAndRightDownLight rune = '\u251e' // ┞
BoxDrawingsDownHeavyAndRightUpLight rune = '\u251f' // ┟
BoxDrawingsVerticalHeavyAndRightLight rune = '\u2520' // ┠
BoxDrawingsDownLightAndRightUpHeavy rune = '\u2521' // ┡
BoxDrawingsUpLightAndRightDownHeavy rune = '\u2522' // ┢
BoxDrawingsHeavyVerticalAndRight rune = '\u2523' // ┣
BoxDrawingsLightVerticalAndLeft rune = '\u2524' // ┤
BoxDrawingsVerticalLightAndLeftHeavy rune = '\u2525' // ┥
BoxDrawingsUpHeavyAndLeftDownLight rune = '\u2526' // ┦
BoxDrawingsDownHeavyAndLeftUpLight rune = '\u2527' // ┧
BoxDrawingsVerticalHeavyAndLeftLight rune = '\u2528' // ┨
BoxDrawingsDownLightAndLeftUpHeavy rune = '\u2529' // ┨
BoxDrawingsUpLightAndLeftDownHeavy rune = '\u252a' // ┪
BoxDrawingsHeavyVerticalAndLeft rune = '\u252b' // ┫
BoxDrawingsLightDownAndHorizontal rune = '\u252c' // ┬
BoxDrawingsLeftHeavyAndRightDownLight rune = '\u252d' // ┭
BoxDrawingsRightHeavyAndLeftDownLight rune = '\u252e' // ┮
BoxDrawingsDownLightAndHorizontalHeavy rune = '\u252f' // ┯
BoxDrawingsDownHeavyAndHorizontalLight rune = '\u2530' // ┰
BoxDrawingsRightLightAndLeftDownHeavy rune = '\u2531' // ┱
BoxDrawingsLeftLightAndRightDownHeavy rune = '\u2532' // ┲
BoxDrawingsHeavyDownAndHorizontal rune = '\u2533' // ┳
BoxDrawingsLightUpAndHorizontal rune = '\u2534' // ┴
BoxDrawingsLeftHeavyAndRightUpLight rune = '\u2535' // ┵
BoxDrawingsRightHeavyAndLeftUpLight rune = '\u2536' // ┶
BoxDrawingsUpLightAndHorizontalHeavy rune = '\u2537' // ┷
BoxDrawingsUpHeavyAndHorizontalLight rune = '\u2538' // ┸
BoxDrawingsRightLightAndLeftUpHeavy rune = '\u2539' // ┹
BoxDrawingsLeftLightAndRightUpHeavy rune = '\u253a' // ┺
BoxDrawingsHeavyUpAndHorizontal rune = '\u253b' // ┻
BoxDrawingsLightVerticalAndHorizontal rune = '\u253c' // ┼
BoxDrawingsLeftHeavyAndRightVerticalLight rune = '\u253d' // ┽
BoxDrawingsRightHeavyAndLeftVerticalLight rune = '\u253e' // ┾
BoxDrawingsVerticalLightAndHorizontalHeavy rune = '\u253f' // ┿
BoxDrawingsUpHeavyAndDownHorizontalLight rune = '\u2540' // ╀
BoxDrawingsDownHeavyAndUpHorizontalLight rune = '\u2541' // ╁
BoxDrawingsVerticalHeavyAndHorizontalLight rune = '\u2542' // ╂
BoxDrawingsLeftUpHeavyAndRightDownLight rune = '\u2543' // ╃
BoxDrawingsRightUpHeavyAndLeftDownLight rune = '\u2544' // ╄
BoxDrawingsLeftDownHeavyAndRightUpLight rune = '\u2545' // ╅
BoxDrawingsRightDownHeavyAndLeftUpLight rune = '\u2546' // ╆
BoxDrawingsDownLightAndUpHorizontalHeavy rune = '\u2547' // ╇
BoxDrawingsUpLightAndDownHorizontalHeavy rune = '\u2548' // ╈
BoxDrawingsRightLightAndLeftVerticalHeavy rune = '\u2549' // ╉
BoxDrawingsLeftLightAndRightVerticalHeavy rune = '\u254a' // ╊
BoxDrawingsHeavyVerticalAndHorizontal rune = '\u254b' // ╋
BoxDrawingsLightDoubleDashHorizontal rune = '\u254c' // ╌
BoxDrawingsHeavyDoubleDashHorizontal rune = '\u254d' // ╍
BoxDrawingsLightDoubleDashVertical rune = '\u254e' // ╎
BoxDrawingsHeavyDoubleDashVertical rune = '\u254f' // ╏
BoxDrawingsDoubleHorizontal rune = '\u2550' // ═
BoxDrawingsDoubleVertical rune = '\u2551' // ║
BoxDrawingsDownSingleAndRightDouble rune = '\u2552' // ╒
BoxDrawingsDownDoubleAndRightSingle rune = '\u2553' // ╓
BoxDrawingsDoubleDownAndRight rune = '\u2554' // ╔
BoxDrawingsDownSingleAndLeftDouble rune = '\u2555' // ╕
BoxDrawingsDownDoubleAndLeftSingle rune = '\u2556' // ╖
BoxDrawingsDoubleDownAndLeft rune = '\u2557' // ╗
BoxDrawingsUpSingleAndRightDouble rune = '\u2558' // ╘
BoxDrawingsUpDoubleAndRightSingle rune = '\u2559' // ╙
BoxDrawingsDoubleUpAndRight rune = '\u255a' // ╚
BoxDrawingsUpSingleAndLeftDouble rune = '\u255b' // ╛
BoxDrawingsUpDoubleAndLeftSingle rune = '\u255c' // ╜
BoxDrawingsDoubleUpAndLeft rune = '\u255d' // ╝
BoxDrawingsVerticalSingleAndRightDouble rune = '\u255e' // ╞
BoxDrawingsVerticalDoubleAndRightSingle rune = '\u255f' // ╟
BoxDrawingsDoubleVerticalAndRight rune = '\u2560' // ╠
BoxDrawingsVerticalSingleAndLeftDouble rune = '\u2561' // ╡
BoxDrawingsVerticalDoubleAndLeftSingle rune = '\u2562' // ╢
BoxDrawingsDoubleVerticalAndLeft rune = '\u2563' // ╣
BoxDrawingsDownSingleAndHorizontalDouble rune = '\u2564' // ╤
BoxDrawingsDownDoubleAndHorizontalSingle rune = '\u2565' // ╥
BoxDrawingsDoubleDownAndHorizontal rune = '\u2566' // ╦
BoxDrawingsUpSingleAndHorizontalDouble rune = '\u2567' // ╧
BoxDrawingsUpDoubleAndHorizontalSingle rune = '\u2568' // ╨
BoxDrawingsDoubleUpAndHorizontal rune = '\u2569' // ╩
BoxDrawingsVerticalSingleAndHorizontalDouble rune = '\u256a' // ╪
BoxDrawingsVerticalDoubleAndHorizontalSingle rune = '\u256b' // ╫
BoxDrawingsDoubleVerticalAndHorizontal rune = '\u256c' // ╬
BoxDrawingsLightArcDownAndRight rune = '\u256d' // ╭
BoxDrawingsLightArcDownAndLeft rune = '\u256e' // ╮
BoxDrawingsLightArcUpAndLeft rune = '\u256f' // ╯
BoxDrawingsLightArcUpAndRight rune = '\u2570' // ╰
BoxDrawingsLightDiagonalUpperRightToLowerLeft rune = '\u2571' // ╱
BoxDrawingsLightDiagonalUpperLeftToLowerRight rune = '\u2572' // ╲
BoxDrawingsLightDiagonalCross rune = '\u2573' // ╳
BoxDrawingsLightLeft rune = '\u2574' // ╴
BoxDrawingsLightUp rune = '\u2575' // ╵
BoxDrawingsLightRight rune = '\u2576' // ╶
BoxDrawingsLightDown rune = '\u2577' // ╷
BoxDrawingsHeavyLeft rune = '\u2578' // ╸
BoxDrawingsHeavyUp rune = '\u2579' // ╹
BoxDrawingsHeavyRight rune = '\u257a' // ╺
BoxDrawingsHeavyDown rune = '\u257b' // ╻
BoxDrawingsLightLeftAndHeavyRight rune = '\u257c' // ╼
BoxDrawingsLightUpAndHeavyDown rune = '\u257d' // ╽
BoxDrawingsHeavyLeftAndLightRight rune = '\u257e' // ╾
BoxDrawingsHeavyUpAndLightDown rune = '\u257f' // ╿
// Block Elements.
BlockUpperHalfBlock rune = '\u2580' // ▀
BlockLowerOneEighthBlock rune = '\u2581' // ▁
BlockLowerOneQuarterBlock rune = '\u2582' // ▂
BlockLowerThreeEighthsBlock rune = '\u2583' // ▃
BlockLowerHalfBlock rune = '\u2584' // ▄
BlockLowerFiveEighthsBlock rune = '\u2585' // ▅
BlockLowerThreeQuartersBlock rune = '\u2586' // ▆
BlockLowerSevenEighthsBlock rune = '\u2587' // ▇
BlockFullBlock rune = '\u2588' // █
BlockLeftSevenEighthsBlock rune = '\u2589' // ▉
BlockLeftThreeQuartersBlock rune = '\u258A' // ▊
BlockLeftFiveEighthsBlock rune = '\u258B' // ▋
BlockLeftHalfBlock rune = '\u258C' // ▌
BlockLeftThreeEighthsBlock rune = '\u258D' // ▍
BlockLeftOneQuarterBlock rune = '\u258E' // ▎
BlockLeftOneEighthBlock rune = '\u258F' // ▏
BlockRightHalfBlock rune = '\u2590' // ▐
BlockLightShade rune = '\u2591' // ░
BlockMediumShade rune = '\u2592' // ▒
BlockDarkShade rune = '\u2593' // ▓
BlockUpperOneEighthBlock rune = '\u2594' // ▔
BlockRightOneEighthBlock rune = '\u2595' // ▕
BlockQuadrantLowerLeft rune = '\u2596' // ▖
BlockQuadrantLowerRight rune = '\u2597' // ▗
BlockQuadrantUpperLeft rune = '\u2598' // ▘
BlockQuadrantUpperLeftAndLowerLeftAndLowerRight rune = '\u2599' // ▙
BlockQuadrantUpperLeftAndLowerRight rune = '\u259A' // ▚
BlockQuadrantUpperLeftAndUpperRightAndLowerLeft rune = '\u259B' // ▛
BlockQuadrantUpperLeftAndUpperRightAndLowerRight rune = '\u259C' // ▜
BlockQuadrantUpperRight rune = '\u259D' // ▝
BlockQuadrantUpperRightAndLowerLeft rune = '\u259E' // ▞
BlockQuadrantUpperRightAndLowerLeftAndLowerRight rune = '\u259F' // ▟
)
// SemigraphicJoints is a map for joining semigraphic (or otherwise) runes.
// So far only light lines are supported but if you want to change the border
// styling you need to provide the joints, too.
// The matching will be sorted ascending by rune value, so you don't need to
// provide all rune combinations,
// e.g. (─) + (│) = (┼) will also match (│) + (─) = (┼)
var SemigraphicJoints = map[string]rune{
// (─) + (│) = (┼)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightVertical}): BoxDrawingsLightVerticalAndHorizontal,
// (─) + (┌) = (┬)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightDownAndRight}): BoxDrawingsLightDownAndHorizontal,
// (─) + (┐) = (┬)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightDownAndLeft}): BoxDrawingsLightDownAndHorizontal,
// (─) + (└) = (┴)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightUpAndRight}): BoxDrawingsLightUpAndHorizontal,
// (─) + (┘) = (┴)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightUpAndLeft}): BoxDrawingsLightUpAndHorizontal,
// (─) + (├) = (┼)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightVerticalAndRight}): BoxDrawingsLightVerticalAndHorizontal,
// (─) + (┤) = (┼)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightVerticalAndLeft}): BoxDrawingsLightVerticalAndHorizontal,
// (─) + (┬) = (┬)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightDownAndHorizontal}): BoxDrawingsLightDownAndHorizontal,
// (─) + (┴) = (┴)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightUpAndHorizontal,
// (─) + (┼) = (┼)
string([]rune{BoxDrawingsLightHorizontal, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (│) + (┌) = (├)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightDownAndRight}): BoxDrawingsLightVerticalAndRight,
// (│) + (┐) = (┤)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightDownAndLeft}): BoxDrawingsLightVerticalAndLeft,
// (│) + (└) = (├)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightUpAndRight}): BoxDrawingsLightVerticalAndRight,
// (│) + (┘) = (┤)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightUpAndLeft}): BoxDrawingsLightVerticalAndLeft,
// (│) + (├) = (├)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightVerticalAndRight}): BoxDrawingsLightVerticalAndRight,
// (│) + (┤) = (┤)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightVerticalAndLeft}): BoxDrawingsLightVerticalAndLeft,
// (│) + (┬) = (┼)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightDownAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (│) + (┴) = (┼)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (│) + (┼) = (┼)
string([]rune{BoxDrawingsLightVertical, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┌) + (┐) = (┬)
string([]rune{BoxDrawingsLightDownAndRight, BoxDrawingsLightDownAndLeft}): BoxDrawingsLightDownAndHorizontal,
// (┌) + (└) = (├)
string([]rune{BoxDrawingsLightDownAndRight, BoxDrawingsLightUpAndRight}): BoxDrawingsLightVerticalAndRight,
// (┌) + (┘) = (┼)
string([]rune{BoxDrawingsLightDownAndRight, BoxDrawingsLightUpAndLeft}): BoxDrawingsLightVerticalAndHorizontal,
// (┌) + (├) = (├)
string([]rune{BoxDrawingsLightDownAndRight, BoxDrawingsLightVerticalAndRight}): BoxDrawingsLightVerticalAndRight,
// (┌) + (┤) = (┼)
string([]rune{BoxDrawingsLightDownAndRight, BoxDrawingsLightVerticalAndLeft}): BoxDrawingsLightVerticalAndHorizontal,
// (┌) + (┬) = (┬)
string([]rune{BoxDrawingsLightDownAndRight, BoxDrawingsLightDownAndHorizontal}): BoxDrawingsLightDownAndHorizontal,
// (┌) + (┴) = (┼)
string([]rune{BoxDrawingsLightDownAndRight, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┌) + (┴) = (┼)
string([]rune{BoxDrawingsLightDownAndRight, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┐) + (└) = (┼)
string([]rune{BoxDrawingsLightDownAndLeft, BoxDrawingsLightUpAndRight}): BoxDrawingsLightVerticalAndHorizontal,
// (┐) + (┘) = (┤)
string([]rune{BoxDrawingsLightDownAndLeft, BoxDrawingsLightUpAndLeft}): BoxDrawingsLightVerticalAndLeft,
// (┐) + (├) = (┼)
string([]rune{BoxDrawingsLightDownAndLeft, BoxDrawingsLightVerticalAndRight}): BoxDrawingsLightVerticalAndHorizontal,
// (┐) + (┤) = (┤)
string([]rune{BoxDrawingsLightDownAndLeft, BoxDrawingsLightVerticalAndLeft}): BoxDrawingsLightVerticalAndLeft,
// (┐) + (┬) = (┬)
string([]rune{BoxDrawingsLightDownAndLeft, BoxDrawingsLightDownAndHorizontal}): BoxDrawingsLightDownAndHorizontal,
// (┐) + (┴) = (┼)
string([]rune{BoxDrawingsLightDownAndLeft, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┐) + (┼) = (┼)
string([]rune{BoxDrawingsLightDownAndLeft, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (└) + (┘) = (┴)
string([]rune{BoxDrawingsLightUpAndRight, BoxDrawingsLightUpAndLeft}): BoxDrawingsLightUpAndHorizontal,
// (└) + (├) = (├)
string([]rune{BoxDrawingsLightUpAndRight, BoxDrawingsLightVerticalAndRight}): BoxDrawingsLightVerticalAndRight,
// (└) + (┤) = (┼)
string([]rune{BoxDrawingsLightUpAndRight, BoxDrawingsLightVerticalAndLeft}): BoxDrawingsLightVerticalAndHorizontal,
// (└) + (┬) = (┼)
string([]rune{BoxDrawingsLightUpAndRight, BoxDrawingsLightDownAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (└) + (┴) = (┴)
string([]rune{BoxDrawingsLightUpAndRight, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightUpAndHorizontal,
// (└) + (┼) = (┼)
string([]rune{BoxDrawingsLightUpAndRight, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┘) + (├) = (┼)
string([]rune{BoxDrawingsLightUpAndLeft, BoxDrawingsLightVerticalAndRight}): BoxDrawingsLightVerticalAndHorizontal,
// (┘) + (┤) = (┤)
string([]rune{BoxDrawingsLightUpAndLeft, BoxDrawingsLightVerticalAndLeft}): BoxDrawingsLightVerticalAndLeft,
// (┘) + (┬) = (┼)
string([]rune{BoxDrawingsLightUpAndLeft, BoxDrawingsLightDownAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┘) + (┴) = (┴)
string([]rune{BoxDrawingsLightUpAndLeft, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightUpAndHorizontal,
// (┘) + (┼) = (┼)
string([]rune{BoxDrawingsLightUpAndLeft, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (├) + (┤) = (┼)
string([]rune{BoxDrawingsLightVerticalAndRight, BoxDrawingsLightVerticalAndLeft}): BoxDrawingsLightVerticalAndHorizontal,
// (├) + (┬) = (┼)
string([]rune{BoxDrawingsLightVerticalAndRight, BoxDrawingsLightDownAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (├) + (┴) = (┼)
string([]rune{BoxDrawingsLightVerticalAndRight, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (├) + (┼) = (┼)
string([]rune{BoxDrawingsLightVerticalAndRight, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┤) + (┬) = (┼)
string([]rune{BoxDrawingsLightVerticalAndLeft, BoxDrawingsLightDownAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┤) + (┴) = (┼)
string([]rune{BoxDrawingsLightVerticalAndLeft, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┤) + (┼) = (┼)
string([]rune{BoxDrawingsLightVerticalAndLeft, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┬) + (┴) = (┼)
string([]rune{BoxDrawingsLightDownAndHorizontal, BoxDrawingsLightUpAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┬) + (┼) = (┼)
string([]rune{BoxDrawingsLightDownAndHorizontal, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
// (┴) + (┼) = (┼)
string([]rune{BoxDrawingsLightUpAndHorizontal, BoxDrawingsLightVerticalAndHorizontal}): BoxDrawingsLightVerticalAndHorizontal,
}
// PrintJoinedSemigraphics prints a semigraphics rune into the screen at the given
// position with the given style, joining it with any existing semigraphics
// rune.At this point, only regular single line borders are supported.
func PrintJoinedSemigraphics(screen tcell.Screen, x, y int, ch rune, style tcell.Style) {
previous, _, _, _ := screen.GetContent(x, y)
// What's the resulting rune?
var result rune
if ch == previous {
result = ch
} else {
if ch < previous {
previous, ch = ch, previous
}
result = SemigraphicJoints[string([]rune{previous, ch})]
}
if result == 0 {
result = ch
}
// We only print something if we have something.
screen.SetContent(x, y, result, nil, style)
}