635 lines
26 KiB
Python
Executable File
635 lines
26 KiB
Python
Executable File
#!/usr/bin/python3
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#
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# Copyright (c) 2016-2017 The Khronos Group Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Used for automatic reflow of Vulkan spec to satisfy the agreed layout to
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# minimize git churn. Most of the logic has to to with detecting asciidoc
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# markup or block types that *shouldn't* be reflowed (tables, code) and
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# ignoring them. It's very likely there are many asciidoc constructs not yet
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# accounted for in the script, our usage of asciidoc markup is intentionally
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# somewhat limited.
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#
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# Also used to insert identifying tags on explicit Valid Usage statements.
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# Usage: reflow.py [-noflow] [-tagvu] [-nextvu #] [-overwrite] [-out dir] [-suffix str] files
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# -noflow acts as a passthrough, instead of reflowing text. Other
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# processing may occur.
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# -tagvu generates explicit VUID tag for Valid Usage statements which
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# don't already have them.
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# -nextvu # starts VUID tag generation at the specified # instead of
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# the value wired into the reflow.py script.
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# -overwrite updates in place (can be risky, make sure there are backups)
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# -out specifies directory to create output file in, default 'out'
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# -suffix specifies suffix to add to output files, default ''
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# files are asciidoc source files from the Vulkan spec to reflow.
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# For error and file-loading interfaces only
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from reflib import *
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import argparse, copy, os, pdb, re, string, sys
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# Markup that always ends a paragraph
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# empty line or whitespace
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# [block options]
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# [[anchor]]
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# // comment
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# <<<< page break
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# :attribute-setting
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# macro-directive::terms
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# + standalone list item continuation
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# label:: labelled list - label must be standalone
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endPara = re.compile('^( *|\[.*\]|//.*|<<<<|:.*|[a-z]+::.*|\+|.*::)$')
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# Special case of markup ending a paragraph, used to track the current command/structure
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includePat = re.compile('^include::(\.\./)+api/+(?P<type>\w+)/(?P<name>\w+).txt\[\]')
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# Find the first pname: pattern in a Valid Usage statement
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pnamePat = re.compile('pname:(?P<param>\w+)')
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# Markup that's OK in a contiguous paragraph but otherwise passed through
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# .anything
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# === Section Titles
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endParaContinue = re.compile('^(\..*|=+ .*)$')
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# Markup for block delimiters whose contents *should* be reformatted
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# -- (exactly two) (open block)
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# **** (4 or more) (sidebar block - why do we have these?!)
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# ==== (4 or more) (example block)
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# ____ (4 or more) (quote block)
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blockReflow = re.compile('^(--|[*=_]{4,})$')
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# Markup for block delimiters whose contents should *not* be reformatted
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# |=== (3 or more) (table)
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# ++++ (4 or more) (passthrough block)
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# .... (4 or more) (literal block)
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# //// (4 or more) (comment block)
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# ---- (4 or more) (listing block)
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# **** (4 or more) (sidebar block)
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blockPassthrough = re.compile('^(\|={3,}|[-+./]{4,})$')
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# Markup for introducing bullet points (hanging paragraphs)
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# * bullet
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# ** bullet
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# -- bullet
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# . bullet
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# :: bullet
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beginBullet = re.compile('^ *([*-]+|\.|::) ')
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# Text that (may) not end sentences
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# A single letter followed by a period, typically a middle initial.
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endInitial = re.compile('^[[:upper:]]\.$')
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# An abbreviation, which doesn't (usually) end a line.
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endAbbrev = re.compile('(e\.g|i\.e|c\.f)\.$', re.IGNORECASE)
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# State machine for reflowing.
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#
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# blockStack - The last element is a line with the asciidoc block delimiter
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# that's currently in effect, such as
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# '--', '----', '****', '======', or '+++++++++'.
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# This affects whether or not the block contents should be formatted.
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# reflowStack - The last element is True or False if the current blockStack
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# contents should be reflowed.
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# vuStack - the last element is True or False if the current blockStack
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# contents are an explicit Valid Usage block.
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# margin - margin to reflow text to.
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# para - list of lines in the paragraph being accumulated. When this is
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# non-empty, there is a current paragraph.
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# leadIndent - indent level (in spaces) of the first line of a paragraph.
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# hangIndent - indent level of the remaining lines of a paragraph.
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# file - file pointer to write to.
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# filename - base name of file being read from.
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# lineNumber - line number being read from the input file.
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# breakPeriod - True if justification should break to a new line after
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# the end of a sentence.
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# breakInitial - True if justification should break to a new line after
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# something that appears to be an initial in someone's name. **TBD**
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# reflow - True if text should be reflowed, False to pass through unchanged.
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# vuPrefix - Prefix of generated Valid Usage tags
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# vuFormat - Format string for generating Valid Usage tags. First argument
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# is vuPrefix, second is command/struct name, third is parameter name,
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# fourth is the tag number.
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# nextvu - Integer to start tagging un-numbered Valid Usage statements with,
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# or None if no tagging should be done.
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# apiName - String name of a Vulkan structure or command for VUID tag
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# generation, or None if one hasn't been included in this file yet.
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class ReflowState:
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"""Represents the state of the reflow operation"""
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def __init__(self,
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filename,
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margin = 76,
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file = sys.stdout,
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breakPeriod = True,
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reflow = True,
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nextvu = None):
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self.blockStack = [ None ]
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self.reflowStack = [ True ]
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self.vuStack = [ False ]
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self.margin = margin
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self.para = []
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self.leadIndent = 0
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self.hangIndent = 0
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self.file = file
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self.filename = filename
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self.lineNumber = 0
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self.breakPeriod = breakPeriod
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self.breakInitial = True
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self.reflow = reflow
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self.vuPrefix = 'VUID'
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self.vuFormat = '{0}-{1}-{2}-{3:0>5d}'
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self.nextvu = nextvu
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self.apiName = ''
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def incrLineNumber(self):
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self.lineNumber = self.lineNumber + 1
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# Print an array of lines with newlines already present
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def printLines(self, lines):
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logDiag(':: printLines:', len(lines), 'lines: ', lines[0], end='')
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for line in lines:
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print(line, file=self.file, end='')
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# Returns True if word ends with a sentence-period, False otherwise.
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# Allows for contraction cases which won't end a line:
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# - A single letter (if breakInitial is True)
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# - Abbreviations: 'c.f.', 'e.g.', 'i.e.' (or mixed-case versions)
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def endSentence(self, word):
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if (word[-1:] != '.' or
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endAbbrev.search(word) or
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(self.breakInitial and endInitial.match(word))):
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return False
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else:
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return True
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# Returns True if word is a Valid Usage ID Tag anchor.
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def vuidAnchor(self, word):
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return (word[0:7] == '[[VUID-')
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# Reflow the current paragraph, respecting the paragraph lead and
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# hanging indentation levels. The algorithm also respects trailing '+'
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# signs that indicate imbedded newlines, and will not reflow a very long
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# word immediately after a bullet point.
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# Just return the paragraph unchanged if the -noflow argument was
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# given.
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def reflowPara(self):
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if not self.reflow:
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return self.para
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logDiag('reflowPara lead indent = ', self.leadIndent,
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'hangIndent =', self.hangIndent,
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'para:', self.para[0], end='')
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# Total words processed (we care about the *first* word vs. others)
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wordCount = 0
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# Tracks the *previous* word processed. It must not be empty.
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prevWord = ' '
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#import pdb; pdb.set_trace()
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for line in self.para:
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line = line.rstrip()
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words = line.split()
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# logDiag('reflowPara: input line =', line)
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numWords = len(words) - 1
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for i in range(0, numWords + 1):
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word = words[i]
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wordLen = len(word)
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wordCount += 1
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endEscape = False
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if (i == numWords and word == '+'):
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# Trailing ' +' must stay on the same line
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endEscape = word
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# logDiag('reflowPara last word of line =', word, 'prevWord =', prevWord, 'endEscape =', endEscape)
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else:
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True
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# logDiag('reflowPara wordCount =', wordCount, 'word =', word, 'prevWord =', prevWord)
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if wordCount == 1:
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# The first word of the paragraph is treated specially.
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# The loop logic becomes trickier if all this code is
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# done prior to looping over lines and words, so all the
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# setup logic is done here.
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outPara = []
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outLine = ''.ljust(self.leadIndent) + word
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outLineLen = self.leadIndent + wordLen
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# If the paragraph begins with a bullet point, generate
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# a hanging indent level if there isn't one already.
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if beginBullet.match(self.para[0]):
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bulletPoint = True
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if len(self.para) > 1:
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logDiag('reflowPara first line matches bullet point',
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'but indent already hanging @ input line',
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self.lineNumber)
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else:
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logDiag('reflowPara first line matches bullet point -'
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'single line, assuming hangIndent @ input line',
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self.lineNumber)
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self.hangIndent = outLineLen + 1
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else:
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bulletPoint = False
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else:
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# Possible actions to take with this word
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#
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# addWord - add word to current line
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# closeLine - append line and start a new (null) one
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# startLine - add word to a new line
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# Default behavior if all the tests below fail is to add
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# this word to the current line, and keep accumulating
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# that line.
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(addWord, closeLine, startLine) = (True, False, False)
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# How long would this line be if the word were added?
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newLen = outLineLen + 1 + wordLen
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# Are we on the first word following a bullet point?
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firstBullet = (wordCount == 2 and bulletPoint)
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if (endEscape):
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# If the new word ends the input line with ' +',
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# add it to the current line.
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(addWord, closeLine, startLine) = (True, True, False)
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elif self.vuidAnchor(word):
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# If the new word is a Valid Usage anchor, break the
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# line afterwards. Note that this should only happen
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# immediately after a bullet point, but we don't
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# currently check for this.
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(addWord, closeLine, startLine) = (True, True, False)
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elif newLen > self.margin:
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if firstBullet:
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# If the word follows a bullet point, add it to
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# the current line no matter its length.
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(addWord, closeLine, startLine) = (True, True, False)
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else:
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# The word overflows, so add it to a new line.
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(addWord, closeLine, startLine) = (False, True, True)
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elif (self.breakPeriod and
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(wordCount > 2 or not firstBullet) and
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self.endSentence(prevWord)):
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# If the previous word ends a sentence and
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# breakPeriod is set, start a new line.
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# The complicated logic allows for leading bullet
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# points which are periods (implicitly numbered lists).
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# @@@ But not yet for explicitly numbered lists.
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(addWord, closeLine, startLine) = (False, True, True)
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# Add a word to the current line
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if addWord:
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if outLine:
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outLine += ' ' + word
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outLineLen = newLen
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else:
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# Fall through to startLine case if there's no
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# current line yet.
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startLine = True
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# Add current line to the output paragraph. Force
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# starting a new line, although we don't yet know if it
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# will ever have contents.
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if closeLine:
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if outLine:
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outPara.append(outLine + '\n')
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outLine = None
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# Start a new line and add a word to it
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if startLine:
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outLine = ''.ljust(self.hangIndent) + word
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outLineLen = self.hangIndent + wordLen
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# Track the previous word, for use in breaking at end of
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# a sentence
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prevWord = word
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# Add this line to the output paragraph.
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if (outLine):
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outPara.append(outLine + '\n')
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return outPara
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# Emit a paragraph, possibly reflowing it depending on the block
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# context. Reset the paragraph accumulator.
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def emitPara(self):
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global vuPat
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if self.para != []:
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if (self.vuStack[-1] and
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self.nextvu != None and
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self.vuPrefix not in self.para[0]):
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# If:
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# - this paragraph is in a Valid Usage block,
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# - VUID tags are being assigned,
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# - a tag is not already present, and
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# - the paragraph is a properly marked-up list item
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# Then add a VUID tag starting with the next free ID.
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# Split the first line after the bullet point
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matches = vuPat.search(self.para[0])
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if matches != None:
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logDiag('findRefs: Matched vuPat on line:', self.para[0], end='')
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head = matches.group('head')
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tail = matches.group('tail')
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# Use the first pname: statement in the paragraph as
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# the parameter name in the VUID tag. This won't always
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# be correct, but should be highly reliable.
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for vuLine in self.para:
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matches = pnamePat.search(vuLine)
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if matches != None:
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break
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if matches != None:
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paramName = matches.group('param')
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else:
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paramName = 'None'
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logWarn(self.filename,
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'No param name found for VUID tag on line:',
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self.para[0])
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newline = (head + ' [[' +
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self.vuFormat.format(self.vuPrefix,
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self.apiName,
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paramName,
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self.nextvu) + ']] ' + tail)
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logDiag('Assigning', self.vuPrefix, self.apiName, self.nextvu,
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' on line:', self.para[0], '->', newline, 'END')
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self.para[0] = newline
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self.nextvu = self.nextvu + 1
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# else:
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# There are only a few cases of this, and they're all
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# legitimate. Leave detecting this case to another tool
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# or hand inspection.
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# logWarn(self.filename + ': Unexpected non-bullet item in VU block (harmless if following an ifdef):',
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# self.para[0])
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if self.reflowStack[-1]:
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self.printLines(self.reflowPara())
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else:
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self.printLines(self.para)
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# Reset the paragraph, including its indentation level
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self.para = []
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self.leadIndent = 0
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self.hangIndent = 0
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# 'line' ends a paragraph and should itself be emitted.
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# line may be None to indicate EOF or other exception.
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def endPara(self, line):
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logDiag('endPara line', self.lineNumber, ': emitting paragraph')
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# Emit current paragraph, this line, and reset tracker
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self.emitPara()
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if line:
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self.printLines( [ line ] )
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# 'line' ends a paragraph (unless there's already a paragraph being
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# accumulated, e.g. len(para) > 0 - currently not implemented)
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def endParaContinue(self, line):
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self.endPara(line)
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# 'line' begins or ends a block. If beginning a block, tag whether or
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# not to reflow the contents.
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# vuBlock is True if the previous line indicates this is a Valid Usage
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# block.
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def endBlock(self, line, reflow = False, vuBlock = False):
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self.endPara(line)
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if self.blockStack[-1] == line:
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logDiag('endBlock line', self.lineNumber,
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': popping block end depth:', len(self.blockStack),
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':', line, end='')
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self.blockStack.pop()
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self.reflowStack.pop()
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self.vuStack.pop()
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else:
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# Start a block
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self.blockStack.append(line)
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self.reflowStack.append(reflow)
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self.vuStack.append(vuBlock)
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logDiag('endBlock reflow =', reflow, ' line', self.lineNumber,
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': pushing block start depth', len(self.blockStack),
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':', line, end='')
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# 'line' begins or ends a block. The paragraphs in the block *should* be
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# reformatted (e.g. a NOTE).
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def endParaBlockReflow(self, line, vuBlock):
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self.endBlock(line, reflow = True, vuBlock = vuBlock)
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# 'line' begins or ends a block. The paragraphs in the block should
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# *not* be reformatted (e.g. a NOTE).
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def endParaBlockPassthrough(self, line):
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self.endBlock(line, reflow = False)
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# 'line' starts or continues a paragraph.
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# Paragraphs may have "hanging indent", e.g.
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# * Bullet point...
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# ... continued
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# In this case, when the higher indentation level ends, so does the
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# paragraph.
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def addLine(self, line):
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logDiag('addLine line', self.lineNumber, ':', line, end='')
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# See https://stackoverflow.com/questions/13648813/what-is-the-pythonic-way-to-count-the-leading-spaces-in-a-string
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indent = len(line) - len(line.lstrip())
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# A hanging paragraph ends due to a less-indented line.
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if self.para != [] and indent < self.hangIndent:
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logDiag('addLine: line reduces indentation, emit paragraph')
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self.emitPara()
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# A bullet point (or something that looks like one) always ends the
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# current paragraph.
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if beginBullet.match(line):
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logDiag('addLine: line matches beginBullet, emit paragraph')
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self.emitPara()
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if self.para == []:
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# Begin a new paragraph
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self.para = [ line ]
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self.leadIndent = indent
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self.hangIndent = indent
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else:
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# Add a line to a paragraph. Increase the hanging indentation
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# level - once.
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if self.hangIndent == self.leadIndent:
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self.hangIndent = indent
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self.para.append(line)
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def reflowFile(filename, args):
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logDiag('reflow: filename', filename)
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lines = loadFile(filename)
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if (lines == None):
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return
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# Output file handle and reflow object for this file. There are no race
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# conditions on overwriting the input, but it's not recommended unless
|
|
# you have backing store such as git.
|
|
|
|
if args.overwrite:
|
|
outFilename = filename
|
|
else:
|
|
outFilename = args.outDir + '/' + os.path.basename(filename) + args.suffix
|
|
|
|
try:
|
|
fp = open(outFilename, 'w', encoding='utf8')
|
|
except:
|
|
logWarn('Cannot open output file', filename, ':', sys.exc_info()[0])
|
|
return None
|
|
|
|
state = ReflowState(filename,
|
|
file = fp,
|
|
reflow = not args.noflow,
|
|
nextvu = args.nextvu)
|
|
|
|
for line in lines:
|
|
state.incrLineNumber()
|
|
|
|
# The logic here is broken. If we're in a non-reflowable block and
|
|
# this line *doesn't* end the block, it should always be
|
|
# accumulated.
|
|
|
|
if endPara.match(line):
|
|
# Ending a paragraph. Emit the current paragraph, if any, and
|
|
# prepare to begin a new paragraph.
|
|
|
|
state.endPara(line)
|
|
|
|
# If this is an include:: line starting the definition of a
|
|
# structure or command, track that for use in VUID generation.
|
|
|
|
matches = includePat.search(line)
|
|
if matches != None:
|
|
type = matches.group('type')
|
|
if (type == 'protos' or type == 'structs'):
|
|
state.apiName = matches.group('name')
|
|
|
|
elif endParaContinue.match(line):
|
|
# For now, always just end the paragraph.
|
|
# Could check see if len(para) > 0 to accumulate.
|
|
|
|
state.endParaContinue(line)
|
|
elif blockReflow.match(line):
|
|
# Starting or ending a block whose contents may be reflowed.
|
|
# Blocks cannot be nested.
|
|
|
|
# First see if this is an explicit Valid Usage block
|
|
vuBlock = (state.lineNumber > 1 and
|
|
lines[state.lineNumber-2] == '.Valid Usage\n')
|
|
|
|
state.endParaBlockReflow(line, vuBlock)
|
|
elif blockPassthrough.match(line):
|
|
# Starting or ending a block whose contents must not be reflowed.
|
|
# These are tables, etc. Blocks cannot be nested.
|
|
|
|
state.endParaBlockPassthrough(line)
|
|
else:
|
|
# Just accumulate a line to the current paragraph. Watch out for
|
|
# hanging indents / bullet-points and track that indent level.
|
|
|
|
state.addLine(line)
|
|
|
|
# Cleanup at end of file
|
|
state.endPara(None)
|
|
|
|
# Sanity check on block nesting
|
|
if len(state.blockStack) > 1:
|
|
logWarn('file', filename,
|
|
'mismatched asciidoc block delimiters at EOF:',
|
|
state.blockStack[-1])
|
|
|
|
fp.close()
|
|
|
|
# Update the 'nextvu' value
|
|
if (args.nextvu != state.nextvu):
|
|
logWarn('Updated nextvu to', state.nextvu, 'after file', filename)
|
|
args.nextvu = state.nextvu
|
|
|
|
# Patterns used to recognize interesting lines in an asciidoc source file.
|
|
# These patterns are only compiled once.
|
|
|
|
# Explicit Valid Usage list item with one or more leading asterisks
|
|
# The re.DOTALL is needed to prevent vuPat.search() from stripping
|
|
# the trailing newline.
|
|
global vuPat
|
|
vuPat = re.compile('^(?P<head> [*]+)( *)(?P<tail>.*)', re.DOTALL)
|
|
|
|
# The value to start tagging VU statements at, unless overridden by -nextvu
|
|
startVUID = 1394
|
|
|
|
if __name__ == '__main__':
|
|
parser = argparse.ArgumentParser()
|
|
|
|
parser.add_argument('-diag', action='store', dest='diagFile',
|
|
help='Set the diagnostic file')
|
|
parser.add_argument('-warn', action='store', dest='warnFile',
|
|
help='Set the warning file')
|
|
parser.add_argument('-log', action='store', dest='logFile',
|
|
help='Set the log file for both diagnostics and warnings')
|
|
parser.add_argument('-overwrite', action='store_true',
|
|
help='Overwrite input filenames instead of writing different output filenames')
|
|
parser.add_argument('-out', action='store', dest='outDir',
|
|
default='out',
|
|
help='Set the output directory in which updated files are generated (default: out)')
|
|
parser.add_argument('-tagvu', action='store_true',
|
|
help='Tag un-tagged Valid Usage statements starting at the value wired into reflow.py')
|
|
parser.add_argument('-nextvu', action='store', dest='nextvu', type=int,
|
|
default=None,
|
|
help='Tag un-tagged Valid Usage statements starting at the specified base VUID instead of the value wired into reflow.py')
|
|
parser.add_argument('-noflow', action='store_true', dest='noflow',
|
|
help='Do not reflow text. Other actions may apply.')
|
|
parser.add_argument('-suffix', action='store', dest='suffix',
|
|
default='',
|
|
help='Set the suffix added to updated file names (default: none)')
|
|
parser.add_argument('files', metavar='filename', nargs='*',
|
|
help='a filename to reflow text in')
|
|
parser.add_argument('--version', action='version', version='%(prog)s 1.0')
|
|
|
|
args = parser.parse_args()
|
|
|
|
setLogFile(True, True, args.logFile)
|
|
setLogFile(True, False, args.diagFile)
|
|
setLogFile(False, True, args.warnFile)
|
|
|
|
if args.overwrite:
|
|
logWarn('reflow.py: will overwrite all input files')
|
|
|
|
if args.tagvu and args.nextvu == None:
|
|
args.nextvu = startVUID
|
|
|
|
if args.nextvu != None:
|
|
logWarn('Tagging untagged Valid Usage statements starting at', args.nextvu)
|
|
|
|
for file in args.files:
|
|
reflowFile(file, args)
|
|
|
|
if args.nextvu != None and args.nextvu != startVUID:
|
|
logWarn('You must now edit the value of reflow.py:startVUID to',
|
|
args.nextvu,
|
|
'so that future runs will not overwrite existing VUID tags')
|