mirror of https://github.com/japl-lang/jale.git
147 lines
2.8 KiB
Nim
147 lines
2.8 KiB
Nim
# multiline.nim
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import line
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type
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Multiline* = ref object
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lines: seq[Line]
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x,y: int
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# getters/setters
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proc X*(ml: Multiline): int =
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ml.x
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proc Y*(ml: Multiline): int =
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ml.y
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# constructor
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proc newMultiline*: Multiline =
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new(result)
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result.lines = @[]
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result.lines.add(newLine())
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result.x = 0
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result.y = 0
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# methods
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proc lineLen*(ml: Multiline): int =
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ml.lines[ml.y].len()
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proc lineHigh*(ml: Multiline): int =
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ml.lineLen() - 1
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proc len*(ml: Multiline): int =
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ml.lines.len()
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proc high*(ml: Multiline): int =
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ml.lines.high()
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# internal setter
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proc sety(ml: Multiline, target: int) =
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ml.y = target
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if ml.x > ml.lineLen():
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ml.x = ml.lineLen()
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# warning check before calling them if y lands in illegal territory
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# these are unsafe!
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proc decy(ml: Multiline) =
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ml.sety(ml.y-1)
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proc incy(ml: Multiline) =
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ml.sety(ml.y+1)
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proc left*(ml: Multiline) =
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if ml.x > 0:
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dec ml.x
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proc right*(ml: Multiline) =
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if ml.x < ml.lineLen():
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inc ml.x
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proc up*(ml: Multiline) =
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if ml.y > 0:
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ml.decy
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proc down*(ml: Multiline) =
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if ml.y < ml.lines.high():
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ml.incy
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proc home*(ml: Multiline) =
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ml.x = 0
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proc `end`*(ml: Multiline) =
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ml.x = ml.lineLen()
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proc vhome*(ml: Multiline) =
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ml.sety(0)
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proc vend*(ml: Multiline) =
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ml.sety(ml.high())
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proc insert*(ml: Multiline, str: string) =
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ml.lines[ml.y].insert(str, ml.x)
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ml.x += str.len()
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proc delete*(ml: Multiline) =
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if ml.x < ml.lineLen():
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ml.lines[ml.y].delete(ml.x, ml.x)
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proc backspace*(ml: Multiline) =
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if ml.x > 0:
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ml.lines[ml.y].delete(ml.x - 1, ml.x - 1)
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dec ml.x
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elif ml.x == 0 and ml.y > 0:
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let cut = ml.lines[ml.y].content
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ml.lines.delete(ml.y)
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dec ml.y
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ml.x = ml.lineLen()
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ml.lines[ml.y].insert(cut, ml.x)
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proc insertline*(ml: Multiline) =
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# the default behaviour of command mode o
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if ml.y == ml.lines.high():
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ml.lines.add(newLine())
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else:
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ml.lines.insert(newLine(), ml.y + 1)
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inc ml.y
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ml.x = 0
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proc enter*(ml: Multiline) =
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# the default behaviour of enter in normie editors
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if ml.x > ml.lineHigh():
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ml.insertline() # when end of line, it's just an insertline
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else:
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let cut = ml.lines[ml.y].range(ml.x, ml.lineHigh())
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ml.lines[ml.y].delete(ml.x, ml.lineHigh())
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ml.insertline()
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ml.lines[ml.y].insert(cut, 0)
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proc clearline*(ml: Multiline) =
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ml.lines[ml.y].clearLine()
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proc removeline*(ml: Multiline) =
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ml.lines.delete(ml.y)
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if ml.lines.len() == 0:
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ml.lines.add(newLine())
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if ml.y > ml.lines.high():
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dec ml.y
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proc getLine*(ml: Multiline, line: int = -1): string =
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if line == -1:
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ml.lines[ml.y].content
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else:
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if line >= 0 and line <= ml.lines.high():
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ml.lines[line].content
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else:
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""
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proc getContent*(ml: Multiline): string =
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for line in ml.lines:
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result &= line.content & "\n"
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result[0..result.high()-1] # cut finishing newline
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