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Tab indentation with \t and spaces. Closes #2

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This commit is contained in:
Felix Angell 2016-11-26 21:56:03 +00:00
parent e2a2028cbb
commit 0528230f57
1 changed files with 40 additions and 9 deletions
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49
gui/buffer.go
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@ -8,10 +8,6 @@ import (
"unicode/utf8"
)
const (
TAB_SIZE int32 = 4
)
type Cursor struct {
x, y int
rx, ry int
@ -31,12 +27,16 @@ func (c *Cursor) move_render(x, y, rx, ry int) {
c.ry += ry
}
const (
var (
cursor_flash_ms uint32 = 400
reset_delay_ms uint32 = 400
)
var (
// buffer
TAB_SIZE int32 = 4
HUNGRY_BACKSPACE bool = true
TABS_ARE_SPACES bool = true
// cursor
should_draw bool = false
should_flash bool = true
timer uint32 = 0
@ -127,13 +127,34 @@ func (b *Buffer) processActionKey(t *sdl.KeyDownEvent) {
b.curs.move(0, 1)
for x := 0; x < initial_x; x++ {
// TODO(Felix): there's a bug here where
// this doesn't account for the rendered x
// position when we use tabs as tabs and not spaces
b.curs.move(-1, 0)
}
b.contents = append(b.contents, new_rope)
case sdl.SCANCODE_BACKSPACE:
if b.curs.x > 0 {
offs := -1
if !TABS_ARE_SPACES {
if b.contents[b.curs.y].Index(b.curs.x) == '\t' {
offs = int(-TAB_SIZE)
}
} else if HUNGRY_BACKSPACE && b.curs.x >= int(TAB_SIZE) && TABS_ARE_SPACES {
// why x + 1 here? wtf
if b.contents[b.curs.y].Substr((b.curs.x + 1) - int(TAB_SIZE), int(TAB_SIZE)).String() == " " {
// delete {TAB_SIZE} amount of characters
// from the cursors x pos
for i := 0; i < int(TAB_SIZE); i++ {
b.contents[b.curs.y] = b.contents[b.curs.y].Delete(b.curs.x, 1)
b.curs.move(-1, 0)
}
break
}
}
b.contents[b.curs.y] = b.contents[b.curs.y].Delete(b.curs.x, 1)
b.curs.move(-1, 0)
b.curs.move_render(-1, 0, offs, 0)
} else if b.curs.x == 0 && b.curs.y > 0 {
// start of line, wrap to previous
// two cases here:
@ -176,7 +197,17 @@ func (b *Buffer) processActionKey(t *sdl.KeyDownEvent) {
b.curs.move(-1, 0)
}
case sdl.SCANCODE_TAB:
// TODO
if TABS_ARE_SPACES {
// make an empty rune array of TAB_SIZE, cast to string
// and insert it.
b.contents[b.curs.y] = b.contents[b.curs.y].Insert(b.curs.x, " ")
b.curs.move(int(TAB_SIZE), 0)
} else {
b.contents[b.curs.y] = b.contents[b.curs.y].Insert(b.curs.x, string('\t'))
// the actual position is + 1, but we make it
// move by TAB_SIZE characters on the view.
b.curs.move_render(1, 0, int(TAB_SIZE), 0)
}
}
}