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- from __future__ import absolute_import, unicode_literals
-
- import re
-
- import sqlparse
- from django.utils.html import escape
- from sqlparse import tokens as T
-
-
- class BoldKeywordFilter:
- """sqlparse filter to bold SQL keywords"""
- def process(self, stream):
- """Process the token stream"""
- for token_type, value in stream:
- is_keyword = token_type in T.Keyword
- if is_keyword:
- yield T.Text, '<strong>'
- yield token_type, escape(value)
- if is_keyword:
- yield T.Text, '</strong>'
-
-
- def reformat_sql(sql):
- stack = sqlparse.engine.FilterStack()
- stack.preprocess.append(BoldKeywordFilter()) # add our custom filter
- stack.postprocess.append(sqlparse.filters.SerializerUnicode()) # tokens -> strings
- return swap_fields(''.join(stack.run(sql)))
-
-
- def swap_fields(sql):
- expr = r'SELECT</strong> (...........*?) <strong>FROM'
- subs = (r'SELECT</strong> '
- r'<span class="djDebugUncollapsed" href="#">•••</span> '
- r'<span class="djDebugCollapsed" href="#">\1</span> '
- r'<strong>FROM')
- return re.sub(expr, subs, sql)
-
-
- def contrasting_color_generator():
- """
- Generate constrasting colors by varying most significant bit of RGB first,
- and then vary subsequent bits systematically.
- """
- def rgb_to_hex(rgb):
- return '#%02x%02x%02x' % tuple(rgb)
-
- triples = [(1, 0, 0), (0, 1, 0), (0, 0, 1),
- (1, 1, 0), (0, 1, 1), (1, 0, 1), (1, 1, 1)]
- n = 1 << 7
- so_far = [[0, 0, 0]]
- while True:
- if n == 0: # This happens after 2**24 colours; presumably, never
- yield "#000000" # black
- copy_so_far = list(so_far)
- for triple in triples:
- for previous in copy_so_far:
- rgb = [n * triple[i] + previous[i] for i in range(3)]
- so_far.append(rgb)
- yield rgb_to_hex(rgb)
- n >>= 1
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