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A JSON-specific lexer for Pygments by Norman Richards (@orb) has been added. It attempts to provide more interesting syntax highlighting which correctly distinguishes between attribute names and values. Closes #25.
78 lines
2.1 KiB
Python
78 lines
2.1 KiB
Python
"""
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JSON lexer by Norman Richards
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It's already been merged into Pygments but not released yet,
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so we are temporarily bundling it with HTTPie.
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It can be removed once Pygments > 1.4 has been released.
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See <https://github.com/jkbr/httpie/pull/25> for more details.
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"""
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import re
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from pygments import token
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from pygments.lexer import RegexLexer, include
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class JSONLexer(RegexLexer):
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name = 'JSON Lexer'
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aliases = ['json']
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filenames = ['*.json']
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mimetypes = []
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flags = re.DOTALL
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tokens = {
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'whitespace': [
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(r'\s+', token.Text),
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],
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# represents a simple terminal value
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'simplevalue':[
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(r'(true|false|null)\b', token.Keyword.Constant),
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(r'-?[0-9]+', token.Number.Integer),
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(r'"(\\\\|\\"|[^"])*"', token.String.Double),
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],
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# the right hand side of an object, after the attribute name
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'objectattribute': [
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include('value'),
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(r':', token.Punctuation),
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# comma terminates the attribute but expects more
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(r',', token.Punctuation, '#pop'),
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# a closing bracket terminates the entire object, so pop twice
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(r'}', token.Punctuation, ('#pop', '#pop')),
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],
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# a json object - { attr, attr, ... }
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'objectvalue': [
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include('whitespace'),
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(r'"(\\\\|\\"|[^"])*"', token.Name.Tag, 'objectattribute'),
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(r'}', token.Punctuation, '#pop'),
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],
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# json array - [ value, value, ... }
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'arrayvalue': [
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include('whitespace'),
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include('value'),
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(r',', token.Punctuation),
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(r']', token.Punctuation, '#pop'),
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],
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# a json value - either a simple value or a complex value (object or array)
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'value': [
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include('whitespace'),
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include('simplevalue'),
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(r'{', token.Punctuation, 'objectvalue'),
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(r'\[', token.Punctuation, 'arrayvalue'),
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],
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# the root of a json document would be a value
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'root': [
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include('value'),
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],
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}
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