mirror of https://github.com/zulip/zulip.git
209 lines
9.8 KiB
Python
209 lines
9.8 KiB
Python
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from typing import Any, Dict, List
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from .template_parser import (
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tokenize,
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is_django_block_tag,
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)
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import subprocess
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def pretty_print_html(html, num_spaces=4):
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# type: (str, int) -> str
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# We use 1-based indexing for both rows and columns.
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tokens = tokenize(html)
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lines = html.split('\n')
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# We will keep a stack of "start" tags so that we know
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# when HTML ranges end. Note that some start tags won't
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# be blocks from an indentation standpoint.
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stack = [] # type: List[Dict[str, Any]]
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# Seed our stack with a pseudo entry to make depth calculations
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# easier.
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info = dict(
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block=False,
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depth=-1,
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line=-1,
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token_kind='html_start',
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tag='html',
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extra_indent=0,
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ignore_lines=[]) # type: Dict[str, Any]
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stack.append(info)
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# Our main job is to figure out offsets that we use to nudge lines
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# over by.
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offsets = {} # type: Dict[int, int]
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# Loop through our start/end tokens, and calculate offsets. As
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# we proceed, we will push/pop info dictionaries on/off a stack.
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for token in tokens:
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if token.kind in ('html_start', 'handlebars_start', 'handlebars_singleton',
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'html_singleton', 'django_start',
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'jinja2_whitespace_stripped_type2_start',
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'jinja2_whitespace_stripped_start') and stack[-1]['tag'] != 'pre':
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# An HTML start tag should only cause a new indent if we
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# are on a new line.
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if (token.tag not in ('extends', 'include', 'else', 'elif') and
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(is_django_block_tag(token.tag) or
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token.kind != 'django_start')):
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is_block = token.line > stack[-1]['line']
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if is_block:
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if (((token.kind == 'handlebars_start' and
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stack[-1]['token_kind'] == 'handlebars_start') or
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(token.kind in {'django_start',
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'jinja2_whitespace_stripped_type2_start',
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'jinja2_whitespace_stripped_start'} and
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stack[-1]['token_kind'] in {'django_start',
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'jinja2_whitespace_stripped_type2_start',
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'jinja2_whitespace_stripped_start'})) and
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not stack[-1]['indenting']):
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info = stack.pop()
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info['depth'] = info['depth'] + 1
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info['indenting'] = True
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info['adjust_offset_until'] = token.line
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stack.append(info)
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new_depth = stack[-1]['depth'] + 1
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extra_indent = stack[-1]['extra_indent']
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line = lines[token.line - 1]
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adjustment = len(line)-len(line.lstrip()) + 1
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offset = (1 + extra_indent + new_depth * num_spaces) - adjustment
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info = dict(
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block=True,
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depth=new_depth,
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actual_depth=new_depth,
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line=token.line,
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tag=token.tag,
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token_kind=token.kind,
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line_span=token.line_span,
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offset=offset,
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extra_indent=token.col - adjustment + extra_indent,
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extra_indent_prev=extra_indent,
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adjustment=adjustment,
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indenting=True,
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adjust_offset_until=token.line,
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ignore_lines=[]
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)
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if token.kind in ('handlebars_start', 'django_start'):
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info.update(dict(depth=new_depth - 1, indenting=False))
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else:
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info = dict(
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block=False,
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depth=stack[-1]['depth'],
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actual_depth=stack[-1]['depth'],
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line=token.line,
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tag=token.tag,
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token_kind=token.kind,
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extra_indent=stack[-1]['extra_indent'],
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ignore_lines=[]
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)
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stack.append(info)
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elif (token.kind in ('html_end', 'handlebars_end', 'html_singleton_end',
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'django_end', 'handlebars_singleton_end',
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'jinja2_whitespace_stripped_end') and
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(stack[-1]['tag'] != 'pre' or token.tag == 'pre')):
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info = stack.pop()
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if info['block']:
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# We are at the end of an indentation block. We
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# assume the whole block was formatted ok before, just
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# possibly at an indentation that we don't like, so we
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# nudge over all lines in the block by the same offset.
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start_line = info['line']
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end_line = token.line
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if token.tag == 'pre':
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offsets[start_line] = 0
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offsets[end_line] = 0
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stack[-1]['ignore_lines'].append(start_line)
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stack[-1]['ignore_lines'].append(end_line)
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else:
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offsets[start_line] = info['offset']
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line = lines[token.line - 1]
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adjustment = len(line)-len(line.lstrip()) + 1
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if adjustment == token.col and token.kind != 'html_singleton_end':
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offsets[end_line] = (info['offset'] +
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info['adjustment'] -
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adjustment +
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info['extra_indent'] -
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info['extra_indent_prev'])
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elif (start_line + info['line_span'] - 1 == end_line and
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info['line_span'] > 1):
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offsets[end_line] = (1 + info['extra_indent'] +
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(info['depth'] + 1) * num_spaces) - adjustment
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# We would like singleton tags and tags which spread over
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# multiple lines to have 2 space indentation.
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offsets[end_line] -= 2
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elif token.line != info['line']:
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offsets[end_line] = info['offset']
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if token.tag != 'pre' and token.tag != 'script':
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for line_num in range(start_line + 1, end_line):
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# Be careful not to override offsets that happened
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# deeper in the HTML within our block.
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if line_num not in offsets:
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line = lines[line_num - 1]
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new_depth = info['depth'] + 1
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if (line.lstrip().startswith('{{else}}') or
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line.lstrip().startswith('{% else %}') or
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line.lstrip().startswith('{% elif')):
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new_depth = info['actual_depth']
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extra_indent = info['extra_indent']
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adjustment = len(line)-len(line.lstrip()) + 1
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offset = (1 + extra_indent + new_depth * num_spaces) - adjustment
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if line_num <= start_line + info['line_span'] - 1:
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# We would like singleton tags and tags which spread over
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# multiple lines to have 2 space indentation.
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offset -= 2
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offsets[line_num] = offset
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elif (token.kind in ('handlebars_end', 'django_end') and
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info['indenting'] and
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line_num < info['adjust_offset_until'] and
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line_num not in info['ignore_lines']):
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offsets[line_num] += num_spaces
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elif token.tag != 'pre':
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for line_num in range(start_line + 1, end_line):
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if line_num not in offsets:
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offsets[line_num] = info['offset']
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else:
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for line_num in range(start_line + 1, end_line):
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if line_num not in offsets:
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offsets[line_num] = 0
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stack[-1]['ignore_lines'].append(line_num)
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# Now that we have all of our offsets calculated, we can just
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# join all our lines together, fixing up offsets as needed.
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formatted_lines = []
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for i, line in enumerate(html.split('\n')):
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row = i + 1
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offset = offsets.get(row, 0)
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pretty_line = line
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if line.strip() == '':
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pretty_line = ''
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else:
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if offset > 0:
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pretty_line = (' ' * offset) + pretty_line
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elif offset < 0:
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pretty_line = pretty_line[-1 * offset:]
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assert line.strip() == pretty_line.strip()
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formatted_lines.append(pretty_line)
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return '\n'.join(formatted_lines)
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def validate_indent_html(fn):
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# type: (str) -> int
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file = open(fn)
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html = file.read()
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phtml = pretty_print_html(html)
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file.close()
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if not html.split('\n') == phtml.split('\n'):
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print('Invalid Indentation detected in file: '
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'%s\nDiff for the file against expected indented file:' % (fn,), flush=True)
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with subprocess.Popen(
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['diff', fn, '-'],
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stdin=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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universal_newlines=True) as p:
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p.communicate(phtml)
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return 0
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return 1
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