60 lines
1.4 KiB
Python
60 lines
1.4 KiB
Python
"""Parse link title
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"""
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from ..common.utils import charCodeAt, unescapeAll
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class _Result:
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__slots__ = ("ok", "pos", "lines", "str")
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def __init__(self) -> None:
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self.ok = False
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self.pos = 0
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self.lines = 0
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self.str = ""
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def __str__(self) -> str:
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return self.str
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def parseLinkTitle(string: str, pos: int, maximum: int) -> _Result:
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lines = 0
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start = pos
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result = _Result()
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if pos >= maximum:
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return result
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marker = charCodeAt(string, pos)
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# /* " */ /* ' */ /* ( */
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if marker != 0x22 and marker != 0x27 and marker != 0x28:
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return result
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pos += 1
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# if opening marker is "(", switch it to closing marker ")"
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if marker == 0x28:
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marker = 0x29
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while pos < maximum:
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code = charCodeAt(string, pos)
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if code == marker:
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title = string[start + 1 : pos]
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title = unescapeAll(title)
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result.pos = pos + 1
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result.lines = lines
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result.str = title
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result.ok = True
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return result
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elif code == 0x28 and marker == 0x29: # /* ( */ /* ) */
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return result
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elif code == 0x0A:
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lines += 1
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elif code == 0x5C and pos + 1 < maximum: # /* \ */
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pos += 1
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if charCodeAt(string, pos) == 0x0A:
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lines += 1
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pos += 1
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return result
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