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Add *Gui.Ascii to enable ASCII line art

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This commit is contained in:
Roi Martin 2017-02-06 23:15:48 +01:00
parent aff177f6e3
commit cfc4e0298f
1 changed files with 19 additions and 5 deletions
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24
gui.go
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@ -62,6 +62,10 @@ type Gui struct {
// If InputEsc is true, when ESC sequence is in the buffer and it doesn't // If InputEsc is true, when ESC sequence is in the buffer and it doesn't
// match any known sequence, ESC means KeyEsc. // match any known sequence, ESC means KeyEsc.
InputEsc bool InputEsc bool
// If Ascii is true then use ASCII instead of unicode to draw the
// interface. Using ASCII is more portable.
Ascii bool
} }
// NewGui returns a new Gui object with a given output mode. // NewGui returns a new Gui object with a given output mode.
@ -450,17 +454,22 @@ func (g *Gui) flush() error {
// drawFrameEdges draws the horizontal and vertical edges of a view. // drawFrameEdges draws the horizontal and vertical edges of a view.
func (g *Gui) drawFrameEdges(v *View, fgColor, bgColor Attribute) error { func (g *Gui) drawFrameEdges(v *View, fgColor, bgColor Attribute) error {
runeH, runeV := '─', '│'
if g.Ascii {
runeH, runeV = '-', '|'
}
for x := v.x0 + 1; x < v.x1 && x < g.maxX; x++ { for x := v.x0 + 1; x < v.x1 && x < g.maxX; x++ {
if x < 0 { if x < 0 {
continue continue
} }
if v.y0 > -1 && v.y0 < g.maxY { if v.y0 > -1 && v.y0 < g.maxY {
if err := g.SetRune(x, v.y0, '─', fgColor, bgColor); err != nil { if err := g.SetRune(x, v.y0, runeH, fgColor, bgColor); err != nil {
return err return err
} }
} }
if v.y1 > -1 && v.y1 < g.maxY { if v.y1 > -1 && v.y1 < g.maxY {
if err := g.SetRune(x, v.y1, '─', fgColor, bgColor); err != nil { if err := g.SetRune(x, v.y1, runeH, fgColor, bgColor); err != nil {
return err return err
} }
} }
@ -470,12 +479,12 @@ func (g *Gui) drawFrameEdges(v *View, fgColor, bgColor Attribute) error {
continue continue
} }
if v.x0 > -1 && v.x0 < g.maxX { if v.x0 > -1 && v.x0 < g.maxX {
if err := g.SetRune(v.x0, y, '│', fgColor, bgColor); err != nil { if err := g.SetRune(v.x0, y, runeV, fgColor, bgColor); err != nil {
return err return err
} }
} }
if v.x1 > -1 && v.x1 < g.maxX { if v.x1 > -1 && v.x1 < g.maxX {
if err := g.SetRune(v.x1, y, '│', fgColor, bgColor); err != nil { if err := g.SetRune(v.x1, y, runeV, fgColor, bgColor); err != nil {
return err return err
} }
} }
@ -485,10 +494,15 @@ func (g *Gui) drawFrameEdges(v *View, fgColor, bgColor Attribute) error {
// drawFrameCorners draws the corners of the view. // drawFrameCorners draws the corners of the view.
func (g *Gui) drawFrameCorners(v *View, fgColor, bgColor Attribute) error { func (g *Gui) drawFrameCorners(v *View, fgColor, bgColor Attribute) error {
runeTL, runeTR, runeBL, runeBR := '┌', '┐', '└', '┘'
if g.Ascii {
runeTL, runeTR, runeBL, runeBR = '+', '+', '+', '+'
}
corners := []struct { corners := []struct {
x, y int x, y int
ch rune ch rune
}{{v.x0, v.y0, '┌'}, {v.x1, v.y0, '┐'}, {v.x0, v.y1, '└'}, {v.x1, v.y1, '┘'}} }{{v.x0, v.y0, runeTL}, {v.x1, v.y0, runeTR}, {v.x0, v.y1, runeBL}, {v.x1, v.y1, runeBR}}
for _, c := range corners { for _, c := range corners {
if c.x >= 0 && c.y >= 0 && c.x < g.maxX && c.y < g.maxY { if c.x >= 0 && c.y >= 0 && c.x < g.maxX && c.y < g.maxY {