func FindStart(b *util.Buffer, w int, startl, starty int, tabw int) (line, char int) {
line, char = startl, 0
y := starty
for line > 0 && y > 0 {
line--
l := b.Line(line)
t := NewTabber(l, tabw)
dy := t.VisLen/w + 1
y -= dy
char = 0
if y < 0 && t.VisLen > w {
char = t.XToCh[w*-1*y]
}
}
return line, char
}
func printSurf(t *testing.T, surf Surface, tst viewtest, b *util.Buffer) {
t.Log("")
tabrep := strings.Repeat("\\t", tst.tabw)
tabstr := "\\t" + strings.Repeat("--", tst.tabw-1)
for y := 0; y < tst.h; y++ {
got := ""
expect := ""
pretxt := " "
midtxt := " "
if y == 0 {
pretxt = "expected"
midtxt = "got"
}
for x := 0; x < tst.w; x++ {
if r := surf.Rune(x, y); r == '\t' {
got += "\\t"
} else if r == '\n' {
got += "\\n"
} else {
got += string(r) + " "
}
l, ch := tst.expectl[y][x], tst.expectch[y][x]
if l == -1 || ch == -1 {
expect += " "
} else if r := b.Rune(l, ch); r == '\t' {
expect += "\\t"
} else if r == '\n' {
expect += "\\n"
} else {
expect += string(r) + " "
}
}
expect = strings.Replace(expect, tabrep, tabstr, -1)
got = strings.Replace(got, tabrep, tabstr, -1)
t.Logf("\t%v |%v| %v |%v|", pretxt, expect, midtxt, got)
}
t.Log("")
}
func (c *WrapSurf) init(w, h int, b *util.Buffer, startl, starty int, tabw int) {
c.w, c.h = w, h
c.b = b
c.lines = PosMap{}
c.chars = PosMap{}
c.xs = PosMap{}
c.ys = PosMap{}
// figure out line+char for top left corner of canvas
l, nextch := FindStart(b, w, startl, starty, tabw)
// draw from start line and char down
for y := 0; y < h; y++ {
if c.xs[l] == nil {
c.xs[l], c.ys[l] = map[int]int{}, map[int]int{}
}
if c.chars[y] == nil {
c.chars[y], c.lines[y] = map[int]int{}, map[int]int{}
}
var line []rune
if l < b.Nlines() {
line = b.Line(l)
}
var chs []int
chs, nextch = RenderLine(line, nextch, w, tabw)
for x := 0; x < w; x++ {
ch := chs[x]
c.chars[y][x] = ch
c.lines[y][x] = l
if l >= b.Nlines() {
c.lines[y][x] = -1
}
if _, ok := c.xs[l][ch]; !ok {
c.xs[l][ch] = x
c.ys[l][ch] = y
}
}
if nextch >= len(line) { // if we drew entire line
nextch = 0
l++ // go to next line
}
}
}