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<title>Coverage for cogapp\whiteutils</title>
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<h1>Coverage for <b>cogapp\whiteutils</b> :
<span class='pc_cov'>92%</span>
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<h2 class='stats'>
37 statements
<span class='run hide' onclick='toggle_lines(this, "run")'>34 run</span>
<span class='exc' onclick='toggle_lines(this, "exc")'>0 excluded</span>
<span class='mis' onclick='toggle_lines(this, "mis")'>3 missing</span>
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<p class='pln'>""" Indentation utilities for Cog.</p>
<p class='pln'> http://nedbatchelder.com/code/cog</p>
<p class='pln'> </p>
<p class='pln'> Copyright 2004-2009, Ned Batchelder.</p>
<p class='pln'>"""</p>
<p class='pln'> </p>
<p class='stm run hide'>import re</p>
<p class='pln'> </p>
<p class='stm run hide'>def whitePrefix(strings):</p>
<p class='pln'> """ Determine the whitespace prefix common to all non-blank lines</p>
<p class='pln'> in the argument list.</p>
<p class='pln'> """</p>
<p class='pln'> # Remove all blank lines from the list</p>
<p class='stm run hide'> strings = [s for s in strings if s.strip() != '']</p>
<p class='pln'> </p>
<p class='stm run hide'> if not strings: return ''</p>
<p class='pln'> </p>
<p class='pln'> # Find initial whitespace chunk in the first line.</p>
<p class='pln'> # This is the best prefix we can hope for.</p>
<p class='stm run hide'> prefix = re.match(r'\s*', strings[0]).group(0)</p>
<p class='pln'> </p>
<p class='pln'> # Loop over the other strings, keeping only as much of</p>
<p class='pln'> # the prefix as matches each string.</p>
<p class='stm run hide'> for s in strings:</p>
<p class='stm run hide'> for i in range(len(prefix)):</p>
<p class='stm run hide'> if prefix[i] != s[i]:</p>
<p class='stm mis'> prefix = prefix[:i]</p>
<p class='stm mis'> break</p>
<p class='stm run hide'> return prefix</p>
<p class='pln'> </p>
<p class='stm run hide'>def reindentBlock(lines, newIndent=''):</p>
<p class='pln'> """ Take a block of text as a string or list of lines.</p>
<p class='pln'> Remove any common whitespace indentation.</p>
<p class='pln'> Re-indent using newIndent, and return it as a single string.</p>
<p class='pln'> """</p>
<p class='stm run hide'> if isinstance(lines, basestring):</p>
<p class='stm run hide'> lines = lines.split('\n')</p>
<p class='stm run hide'> oldIndent = whitePrefix(lines)</p>
<p class='stm run hide'> outLines = []</p>
<p class='stm run hide'> for l in lines:</p>
<p class='stm run hide'> if oldIndent:</p>
<p class='stm run hide'> l = l.replace(oldIndent, '', 1)</p>
<p class='stm run hide'> if l and newIndent:</p>
<p class='stm run hide'> l = newIndent + l</p>
<p class='stm run hide'> outLines.append(l)</p>
<p class='stm run hide'> return '\n'.join(outLines)</p>
<p class='pln'> </p>
<p class='stm run hide'>def commonPrefix(strings):</p>
<p class='pln'> """ Find the longest string that is a prefix of all the strings.</p>
<p class='pln'> """</p>
<p class='stm run hide'> if not strings:</p>
<p class='stm mis'> return ''</p>
<p class='stm run hide'> prefix = strings[0]</p>
<p class='stm run hide'> for s in strings:</p>
<p class='stm run hide'> if len(s) < len(prefix):</p>
<p class='stm run hide'> prefix = prefix[:len(s)]</p>
<p class='stm run hide'> if not prefix:</p>
<p class='stm run hide'> return ''</p>
<p class='stm run hide'> for i in range(len(prefix)):</p>
<p class='stm run hide'> if prefix[i] != s[i]:</p>
<p class='stm run hide'> prefix = prefix[:i]</p>
<p class='stm run hide'> break</p>
<p class='stm run hide'> return prefix</p>
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