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// Copyright 2015 Zack Guo <gizak@icloud.com>. All rights reserved.
// Use of this source code is governed by a MIT license that can
// be found in the LICENSE file.
package termui
type border struct {
X int
Y int
Width int
Height int
FgColor Attribute
BgColor Attribute
}
type hline struct {
X int
Y int
Length int
FgColor Attribute
BgColor Attribute
}
type vline struct {
X int
Y int
Length int
FgColor Attribute
BgColor Attribute
}
// Draw a horizontal line.
func (l hline) Buffer() []Point {
pts := make([]Point, l.Length)
for i := 0; i < l.Length; i++ {
pts[i].X = l.X + i
pts[i].Y = l.Y
pts[i].Ch = HORIZONTAL_LINE
pts[i].Bg = l.BgColor
pts[i].Fg = l.FgColor
}
return pts
}
// Draw a vertical line.
func (l vline) Buffer() []Point {
pts := make([]Point, l.Length)
for i := 0; i < l.Length; i++ {
pts[i].X = l.X
pts[i].Y = l.Y + i
pts[i].Ch = VERTICAL_LINE
pts[i].Bg = l.BgColor
pts[i].Fg = l.FgColor
}
return pts
}
// Draw a box border.
func (b border) Buffer() []Point {
if b.Width < 2 || b.Height < 2 {
return nil
}
pts := make([]Point, 2*b.Width+2*b.Height-4)
pts[0].X = b.X
pts[0].Y = b.Y
pts[0].Fg = b.FgColor
pts[0].Bg = b.BgColor
pts[0].Ch = TOP_LEFT
pts[1].X = b.X + b.Width - 1
pts[1].Y = b.Y
pts[1].Fg = b.FgColor
pts[1].Bg = b.BgColor
pts[1].Ch = TOP_RIGHT
pts[2].X = b.X
pts[2].Y = b.Y + b.Height - 1
pts[2].Fg = b.FgColor
pts[2].Bg = b.BgColor
pts[2].Ch = BOTTOM_LEFT
pts[3].X = b.X + b.Width - 1
pts[3].Y = b.Y + b.Height - 1
pts[3].Fg = b.FgColor
pts[3].Bg = b.BgColor
pts[3].Ch = BOTTOM_RIGHT
copy(pts[4:], (hline{b.X + 1, b.Y, b.Width - 2, b.FgColor, b.BgColor}).Buffer())
copy(pts[4+b.Width-2:], (hline{b.X + 1, b.Y + b.Height - 1, b.Width - 2, b.FgColor, b.BgColor}).Buffer())
copy(pts[4+2*b.Width-4:], (vline{b.X, b.Y + 1, b.Height - 2, b.FgColor, b.BgColor}).Buffer())
copy(pts[4+2*b.Width-4+b.Height-2:], (vline{b.X + b.Width - 1, b.Y + 1, b.Height - 2, b.FgColor, b.BgColor}).Buffer())
return pts
}
type labeledBorder struct {
border
Label string
LabelFgColor Attribute
LabelBgColor Attribute
}
// Draw a box border with label.
func (lb labeledBorder) Buffer() []Point {
ps := lb.border.Buffer()
maxTxtW := lb.Width - 2
rs := trimStr2Runes(lb.Label, maxTxtW)
for i, j, w := 0, 0, 0; i < len(rs); i++ {
w = charWidth(rs[i])
ps = append(ps, newPointWithAttrs(rs[i], lb.X+1+j, lb.Y, lb.LabelFgColor, lb.LabelBgColor))
j += w
}
return ps
}
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