mirror of
https://github.com/neovim/neovim.git
synced 2024-12-24 05:05:00 -07:00
fd9cc8b0b2
runtime: Add underscore to {} helpSpecial syntax pattern
docs: Added generated api-funcs.txt
515 lines
16 KiB
Python
515 lines
16 KiB
Python
#!/usr/bin/env python
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"""Parses Doxygen XML output to generate Neovim's API documentation.
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This would be easier using lxml and XSLT, but:
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1. This should avoid needing Python dependencies, especially ones that are
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C modules that have library dependencies (lxml requires libxml and
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libxslt).
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2. I wouldn't know how to deal with nested indentation in <para> tags using
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XSLT.
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Each function documentation is formatted with the following rules:
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- Maximum width of 78 characters (`text_width`).
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- Spaces for indentation.
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- Function signature and helptag are on the same line.
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- Helptag is right aligned.
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- Signature and helptag must have a minimum of 8 spaces between them.
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- If the signature is too long, it is placed on the line after the
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helptag. The signature wraps at `text_width - 8` characters with
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subsequent lines indented to the open parenthesis.
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- Documentation body will be indented by 16 spaces.
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- Subsection bodies are indented an additional 4 spaces.
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- Documentation body consists of the function description, parameter details,
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return description, and C declaration.
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- Parameters are omitted for the `void` and `Error *` types, or if the
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parameter is marked as [out].
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- Each function documentation is separated by a single line.
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The C declaration is added to the end to show actual argument types.
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"""
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import os
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import re
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import sys
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import shutil
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import textwrap
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import subprocess
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from xml.dom import minidom
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# Text at the top of the doc file.
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preamble = '''
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Note: This documentation is generated from Neovim's API source code.
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'''
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doc_filename = 'api-funcs.txt'
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# Section name overrides.
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section_name = {
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'vim.c': 'Global',
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}
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# Section ordering.
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section_order = (
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'vim.c',
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'buffer.c',
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'window.c',
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'tabpage.c',
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'ui.c',
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)
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param_exclude = (
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'channel_id',
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)
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text_width = 78
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script_path = os.path.abspath(__file__)
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base_dir = os.path.dirname(os.path.dirname(script_path))
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src_dir = os.path.join(base_dir, 'src/nvim/api')
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out_dir = os.path.join(base_dir, 'tmp/api_doc')
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filter_cmd = '%s %s' % (sys.executable, script_path)
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seen_funcs = set()
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# Tracks `xrefsect` titles. As of this writing, used only for separating
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# deprecated functions.
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xrefs = set()
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# XML Parsing Utilities {{{
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def find_first(parent, name):
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"""Finds the first matching node within parent."""
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sub = parent.getElementsByTagName(name)
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if not sub:
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return None
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return sub[0]
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def get_children(parent, name):
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"""Yield matching child nodes within parent."""
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for child in parent.childNodes:
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if child.nodeType == child.ELEMENT_NODE and child.nodeName == name:
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yield child
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def get_child(parent, name):
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"""Get the first matching child node."""
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for child in get_children(parent, name):
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return child
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return None
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def clean_text(text):
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"""Cleans text.
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Only cleans superfluous whitespace at the moment.
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"""
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return ' '.join(text.split()).strip()
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def clean_lines(text):
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"""Removes superfluous lines.
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The beginning and end of the string is trimmed. Empty lines are collapsed.
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"""
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return re.sub(r'\A\n\s*\n*|\n\s*\n*\Z', '', re.sub(r'(\n\s*\n+)+', '\n\n', text))
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def get_text(parent):
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"""Combine all text in a node."""
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if parent.nodeType == parent.TEXT_NODE:
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return parent.data
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out = ''
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for node in parent.childNodes:
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if node.nodeType == node.TEXT_NODE:
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out += clean_text(node.data)
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elif node.nodeType == node.ELEMENT_NODE:
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out += ' ' + get_text(node)
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return out
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def doc_wrap(text, prefix='', width=70, func=False):
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"""Wraps text to `width`.
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The first line is prefixed with `prefix`, and subsequent lines are aligned.
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If `func` is True, only wrap at commas.
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"""
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if not width:
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return text
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indent_space = ' ' * len(prefix)
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if func:
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lines = [prefix]
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for part in text.split(', '):
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if part[-1] not in ');':
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part += ', '
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if len(lines[-1]) + len(part) > width:
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lines.append(indent_space)
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lines[-1] += part
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return '\n'.join(x.rstrip() for x in lines).rstrip()
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return '\n'.join(textwrap.wrap(text.strip(), width=width,
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initial_indent=prefix,
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subsequent_indent=indent_space))
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def parse_params(parent, width=62):
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"""Parse Doxygen `parameterlist`."""
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name_length = 0
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items = []
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for child in parent.childNodes:
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if child.nodeType == child.TEXT_NODE:
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continue
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name_node = find_first(child, 'parametername')
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if name_node.getAttribute('direction') == 'out':
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continue
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name = get_text(name_node)
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if name in param_exclude:
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continue
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name = '{%s}' % name
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name_length = max(name_length, len(name) + 2)
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desc = ''
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desc_node = get_child(child, 'parameterdescription')
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if desc_node:
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desc = parse_parblock(desc_node, width=None)
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items.append((name.strip(), desc.strip()))
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out = 'Parameters:~\n'
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for name, desc in items:
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name = ' %s' % name.ljust(name_length)
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out += doc_wrap(desc, prefix=name, width=width) + '\n'
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return out.strip()
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def parse_para(parent, width=62):
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"""Parse doxygen `para` tag.
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I assume <para> is a paragraph block or "a block of text". It can contain
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text nodes, or other tags.
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"""
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line = ''
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lines = []
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for child in parent.childNodes:
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if child.nodeType == child.TEXT_NODE:
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line += child.data
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elif child.nodeName == 'computeroutput':
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line += '`%s`' % get_text(child)
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else:
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if line:
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lines.append(doc_wrap(line, width=width))
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line = ''
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if child.nodeName == 'parameterlist':
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lines.append(parse_params(child, width=width))
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elif child.nodeName == 'xrefsect':
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title = get_text(get_child(child, 'xreftitle'))
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xrefs.add(title)
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xrefdesc = parse_para(get_child(child, 'xrefdescription'))
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lines.append(doc_wrap(xrefdesc, prefix='%s: ' % title,
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width=width) + '\n')
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elif child.nodeName == 'simplesect':
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kind = child.getAttribute('kind')
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if kind == 'return':
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lines.append('%s:~' % kind.title())
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lines.append(doc_wrap(parse_para(child),
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prefix=' ',
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width=width))
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else:
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lines.append(get_text(child))
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if line:
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lines.append(doc_wrap(line, width=width))
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return clean_lines('\n'.join(lines).strip())
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def parse_parblock(parent, width=62):
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"""Parses a nested block of `para` tags.
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Named after the \parblock command, but not directly related.
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"""
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paragraphs = []
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for child in parent.childNodes:
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if child.nodeType == child.TEXT_NODE:
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paragraphs.append(doc_wrap(child.data, width=width))
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elif child.nodeName == 'para':
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paragraphs.append(parse_para(child, width=width))
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else:
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paragraphs.append(doc_wrap(get_text(child), width=width))
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paragraphs.append('')
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return clean_lines('\n'.join(paragraphs).strip())
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# }}}
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def parse_source_xml(filename):
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"""Collects API functions.
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This returns two strings:
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1. The API functions
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2. The deprecated API functions
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The caller decides what to do with the deprecated documentation.
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"""
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global xrefs
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xrefs = set()
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functions = []
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deprecated_functions = []
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dom = minidom.parse(filename)
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for member in dom.getElementsByTagName('memberdef'):
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if member.getAttribute('static') == 'yes' or \
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member.getAttribute('kind') != 'function':
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continue
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loc = find_first(member, 'location')
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if 'private' in loc.getAttribute('file'):
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continue
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return_type = get_text(get_child(member, 'type'))
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if return_type == '':
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continue
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if return_type.startswith(('ArrayOf', 'DictionaryOf')):
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parts = return_type.strip('_').split('_')
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return_type = '%s(%s)' % (parts[0], ', '.join(parts[1:]))
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name = get_text(get_child(member, 'name'))
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vimtag = '*%s()*' % name
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args = []
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type_length = 0
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for param in get_children(member, 'param'):
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arg_type = get_text(get_child(param, 'type')).strip()
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arg_name = ''
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declname = get_child(param, 'declname')
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if declname:
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arg_name = get_text(declname).strip()
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if arg_name in param_exclude:
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continue
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if arg_type.endswith('*'):
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arg_type = arg_type.strip('* ')
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arg_name = '*' + arg_name
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type_length = max(type_length, len(arg_type))
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args.append((arg_type, arg_name))
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c_args = []
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for arg_type, arg_name in args:
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c_args.append(' ' + (
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'%s %s' % (arg_type.ljust(type_length), arg_name)).strip())
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c_decl = textwrap.indent('%s %s(\n%s\n);' % (return_type, name,
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',\n'.join(c_args)),
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' ')
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prefix = '%s(' % name
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suffix = '%s)' % ', '.join('{%s}' % a[1] for a in args
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if a[0] not in ('void', 'Error'))
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# Minimum 8 chars between signature and vimtag
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lhs = (text_width - 8) - len(prefix)
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if len(prefix) + len(suffix) > lhs:
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signature = vimtag.rjust(text_width) + '\n'
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signature += doc_wrap(suffix, width=text_width-8, prefix=prefix,
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func=True)
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else:
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signature = prefix + suffix
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signature += vimtag.rjust(text_width - len(signature))
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doc = ''
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desc = find_first(member, 'detaileddescription')
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if desc:
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doc = parse_parblock(desc)
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if 'DEBUG' in os.environ:
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print(textwrap.indent(
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re.sub(r'\n\s*\n+', '\n',
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desc.toprettyxml(indent=' ', newl='\n')), ' ' * 16))
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if not doc:
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doc = 'TODO: Documentation'
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if 'INCLUDE_C_DECL' in os.environ:
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doc += '\n\nC Declaration:~\n>\n'
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doc += c_decl
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doc += '\n<'
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func_doc = signature + '\n'
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func_doc += textwrap.indent(clean_lines(doc), ' ' * 16)
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func_doc = re.sub(r'^\s+([<>])$', r'\1', func_doc, flags=re.M)
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if 'Deprecated' in xrefs:
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deprecated_functions.append(func_doc)
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else:
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functions.append(func_doc)
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xrefs.clear()
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return '\n\n'.join(functions), '\n\n'.join(deprecated_functions)
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def gen_docs(config):
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"""Generate documentation.
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Doxygen is called and configured through stdin.
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"""
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p = subprocess.Popen(['doxygen', '-'], stdin=subprocess.PIPE)
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p.communicate(config.format(input=src_dir, output=out_dir,
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filter=filter_cmd).encode('utf8'))
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if p.returncode:
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sys.exit(p.returncode)
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title_length = 0
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sections = {}
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sep = '=' * text_width
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base = os.path.join(out_dir, 'xml')
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dom = minidom.parse(os.path.join(base, 'index.xml'))
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for compound in dom.getElementsByTagName('compound'):
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if compound.getAttribute('kind') != 'file':
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continue
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filename = get_text(find_first(compound, 'name'))
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if filename.endswith('.c'):
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functions, deprecated = parse_source_xml(
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os.path.join(base, '%s.xml' % compound.getAttribute('refid')))
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if not functions and not deprecated:
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continue
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if functions or deprecated:
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name = os.path.splitext(os.path.basename(filename))[0]
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if name == 'ui':
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name = name.upper()
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else:
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name = name.title()
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doc = ''
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if functions:
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doc += '\n\n' + functions
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if 'INCLUDE_DEPRECATED' in os.environ and deprecated:
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doc += '\n\n\nDeprecated %s Functions:~\n\n' % name
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doc += deprecated
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if doc:
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filename = os.path.basename(filename)
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name = section_name.get(filename, name)
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title = '%s Functions' % name
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helptag = '*api-%s*' % name.lower()
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title_length = max(title_length, len(title))
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sections[filename] = (title, helptag, doc)
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if not sections:
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return
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title_left = '*%s*' % doc_filename
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title_center = 'Neovim API Function Reference'
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title_right = '{Nvim}'
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margin = max(len(title_left), len(title_right))
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head = (title_left.ljust(margin) +
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title_center.center(text_width - margin * 2) +
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title_right.rjust(margin)) + '\n'
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head += '\n%s\n\n' % doc_wrap(preamble, width=text_width)
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head += 'Contents:\n\n'
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docs = ''
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title_length += len(str(len(section_order))) + 2
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i = 0
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for filename in section_order:
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if filename not in sections:
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continue
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title, helptag, section_doc = sections.pop(filename)
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i += 1
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docs += sep
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title = '%d. %s' % (i, title)
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head += (title.ljust(title_length) + ' ' +
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helptag.replace('*', '|') + '\n')
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docs += '\n%s%s' % (title, helptag.rjust(text_width - len(title)))
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docs += section_doc
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docs += '\n\n\n'
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if sections:
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# In case new API sources are added without updating the order dict.
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for title, helptag, section_doc in sections.values():
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i += 1
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docs += sep
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title = '%d. %s' % (i, title)
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head += (title.ljust(title_length) + ' ' +
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helptag.replace('*', '|') + '\n')
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docs += '\n%s%s' % (title, helptag.rjust(text_width - len(title)))
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docs += section_doc
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docs += '\n\n\n'
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docs = '%s\n%s' % (head, docs)
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docs = docs.rstrip() + '\n\n'
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docs += ' vim:tw=78:ts=8:ft=help:norl:'
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doc_file = os.path.join(base_dir, 'runtime/doc', doc_filename)
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with open(doc_file, 'wb') as fp:
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fp.write(docs.encode('utf8'))
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shutil.rmtree(out_dir)
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def filter_source(filename):
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"""Filters the source to fix macros that confuse Doxygen."""
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with open(filename, 'rt') as fp:
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print(re.sub(r'^(ArrayOf|DictionaryOf)(\(.*?\))',
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lambda m: m.group(1)+'_'.join(
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re.split(r'[^\w]+', m.group(2))),
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fp.read(), flags=re.M))
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# Doxygen Config {{{
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Doxyfile = '''
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OUTPUT_DIRECTORY = {output}
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INPUT = {input}
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INPUT_ENCODING = UTF-8
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FILE_PATTERNS = *.h *.c
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RECURSIVE = YES
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INPUT_FILTER = "{filter}"
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EXCLUDE =
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EXCLUDE_SYMLINKS = NO
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EXCLUDE_PATTERNS = */private/*
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EXCLUDE_SYMBOLS =
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GENERATE_HTML = NO
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GENERATE_DOCSET = NO
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GENERATE_HTMLHELP = NO
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GENERATE_QHP = NO
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GENERATE_TREEVIEW = NO
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GENERATE_LATEX = NO
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GENERATE_RTF = NO
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GENERATE_MAN = NO
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GENERATE_DOCBOOK = NO
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GENERATE_AUTOGEN_DEF = NO
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GENERATE_XML = YES
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XML_OUTPUT = xml
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XML_PROGRAMLISTING = NO
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ENABLE_PREPROCESSING = YES
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MACRO_EXPANSION = YES
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EXPAND_ONLY_PREDEF = NO
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'''
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# }}}
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if __name__ == "__main__":
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if len(sys.argv) > 1:
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filter_source(sys.argv[1])
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else:
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gen_docs(Doxyfile)
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# vim: set ft=python ts=4 sw=4 tw=79 et fdm=marker :
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