mirror of https://github.com/japl-lang/jale.git
52 lines
1.4 KiB
Nim
52 lines
1.4 KiB
Nim
# line.nim
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import strformat
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type
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Line* = ref object
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content: string
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# getter
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proc content*(line: Line): string =
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line.content
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# constructor
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proc newLine*: Line =
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Line(content: "")
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# methods
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proc insert*(line: Line, str: string, pos: int) =
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if pos > line.content.high():
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line.content &= str
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elif pos == 0:
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line.content = str & line.content
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else:
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line.content = line.content[0..pos-1] & str & line.content[pos..line.content.high()]
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proc delete*(line: Line, start: int, finish: int) =
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if start > finish or start < 0 or finish > line.content.high():
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raise newException(CatchableError, &"Invalid arguments for Line.delete: start {start}, finish {finish} for line of length {line.content.len()}")
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var result = ""
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if start > 0:
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result &= line.content[0..start-1]
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if finish < line.content.high():
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result &= line.content[finish+1..line.content.high()]
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line.content = result
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proc range*(line: Line, start: int, finish: int): string =
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if start > finish or start < 0 or finish > line.content.high():
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raise newException(CatchableError, &"Invalid arguments for Line.range: start {start}, finish {finish} for line of length {line.content.len()}")
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result = line.content[start..finish]
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proc len*(line: Line): int =
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line.content.len()
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proc high*(line: Line): int =
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line.content.high()
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proc clearLine*(line: Line) =
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line.content = ""
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