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import re |
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import jinja2 |
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import jinja2.ext |
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import jinja2.lexer |
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7
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class HTMLCompressFeed(object): |
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re_whitespace = re.compile('(\"[^\"\\n]*\"|\'[^\'\\n]*\')|([ \\t\\r\\n]+)') |
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token_class = jinja2.lexer.Token |
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block_tokens = { |
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'variable_begin': 'variable_end', |
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'block_begin': 'block_end' |
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} |
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def __init__(self): |
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self.intag = False |
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self.pending = '' |
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self.lineno = 0 |
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self.skip_until = None |
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def finalize(self, strip=False): |
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if self.intag: |
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data = self._collapse(self.pending) |
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else: |
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data = self.pending.rstrip() if strip else self.pending |
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if data.strip(): |
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yield self.token_class(self.lineno, 'data', data) |
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self.pending = '' |
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def _collapse(self, data): |
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return self.re_whitespace.sub( |
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lambda m: ' ' if m.groups()[-1] else m.group(0), |
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data |
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) |
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def feed(self, token): |
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if self.skip_until: |
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yield token |
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if token.type == self.skip_until: |
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self.skip_until = None |
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return |
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if token.type in self.block_tokens: |
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print(token.type) |
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for data in self.finalize(token.type == 'block_begin'): |
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yield data |
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yield token |
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self.skip_until = self.block_tokens[token.type] |
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return |
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lineno = self.lineno |
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size = len(token.value) |
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value = self.pending + token.value |
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while value: |
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lineno = self.lineno if len(value) > size else token.lineno |
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s, p, value = value.partition('>' if self.intag else '<') |
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if self.intag: |
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s = self._collapse(s) |
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if p: |
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self.intag = False |
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s = s.rstrip() + p |
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yield self.token_class(lineno, 'data', s) |
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elif p: |
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self.intag = True |
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s = s + p if s.strip() else p |
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yield self.token_class(lineno, 'data', s) |
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else: |
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value = s |
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break |
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self.lineno = lineno |
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self.pending = value |
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class HTMLCompress(jinja2.ext.Extension): |
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def filter_stream(self, stream): |
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feed = HTMLCompressFeed() |
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for token in stream: |
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for data in feed.feed(token): |
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yield data |
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for data in feed.finalize(): |
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yield data |
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def test(): |
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from jinja2 import Environment |
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env = Environment(extensions=[HTMLCompress]) |
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tmpl = env.from_string(''' |
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<html> |
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<head> |
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<title>{{ title }}</title> |
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</head> |
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<script type=text/javascript> |
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if (foo < 42) { |
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document.write('Foo < Bar'); |
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} |
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</script> |
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<body> |
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<li><a href="{{ href }}" class="a b">{{ title }}</a><br>Test Foo |
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<li><a href="{{ href }}">{{ title }}</a><img src=test.png> |
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</body> |
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</html> |
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''') |
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print(tmpl.render(title=42, href='index.html')) |
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107
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if __name__ == '__main__': |
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test() |
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ergoithz /
browsepy
