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  <h1>Source code for ufoLib.filenames</h1><div class="highlight"><pre>
<span></span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">User name to file name conversion.</span>
<span class="sd">This was taken form the UFO 3 spec.</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">unicode_literals</span>
<span class="kn">from</span> <span class="nn">fontTools.misc.py23</span> <span class="k">import</span> <span class="n">basestring</span><span class="p">,</span> <span class="n">unicode</span>


<span class="n">illegalCharacters</span> <span class="o">=</span> <span class="s2">&quot;</span><span class="se">\&quot;</span><span class="s2"> * + / : &lt; &gt; ? [ \ ] | </span><span class="se">\0</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">&quot; &quot;</span><span class="p">)</span>
<span class="n">illegalCharacters</span> <span class="o">+=</span> <span class="p">[</span><span class="nb">chr</span><span class="p">(</span><span class="n">i</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="mi">32</span><span class="p">)]</span>
<span class="n">illegalCharacters</span> <span class="o">+=</span> <span class="p">[</span><span class="nb">chr</span><span class="p">(</span><span class="mh">0x7F</span><span class="p">)]</span>
<span class="n">reservedFileNames</span> <span class="o">=</span> <span class="s2">&quot;CON PRN AUX CLOCK$ NUL A:-Z: COM1&quot;</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">&quot; &quot;</span><span class="p">)</span>
<span class="n">reservedFileNames</span> <span class="o">+=</span> <span class="s2">&quot;LPT1 LPT2 LPT3 COM2 COM3 COM4&quot;</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">&quot; &quot;</span><span class="p">)</span>
<span class="n">maxFileNameLength</span> <span class="o">=</span> <span class="mi">255</span>


<span class="k">class</span> <span class="nc">NameTranslationError</span><span class="p">(</span><span class="ne">Exception</span><span class="p">):</span>
	<span class="k">pass</span>


<div class="viewcode-block" id="userNameToFileName"><a class="viewcode-back" href="../../ufoLib/filenames.html#ufoLib.filenames.userNameToFileName">[docs]</a><span class="k">def</span> <span class="nf">userNameToFileName</span><span class="p">(</span><span class="n">userName</span><span class="p">,</span> <span class="n">existing</span><span class="o">=</span><span class="p">[],</span> <span class="n">prefix</span><span class="o">=</span><span class="s2">&quot;&quot;</span><span class="p">,</span> <span class="n">suffix</span><span class="o">=</span><span class="s2">&quot;&quot;</span><span class="p">):</span>
	<span class="sd">&quot;&quot;&quot;</span>
<span class="sd">	existing should be a case-insensitive list</span>
<span class="sd">	of all existing file names.</span>

<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;a&quot;) == &quot;a&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;A&quot;) == &quot;A_&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;AE&quot;) == &quot;A_E_&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;Ae&quot;) == &quot;A_e&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;ae&quot;) == &quot;ae&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;aE&quot;) == &quot;aE_&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;a.alt&quot;) == &quot;a.alt&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;A.alt&quot;) == &quot;A_.alt&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;A.Alt&quot;) == &quot;A_.A_lt&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;A.aLt&quot;) == &quot;A_.aL_t&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(u&quot;A.alT&quot;) == &quot;A_.alT_&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;T_H&quot;) == &quot;T__H_&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;T_h&quot;) == &quot;T__h&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;t_h&quot;) == &quot;t_h&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;F_F_I&quot;) == &quot;F__F__I_&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;f_f_i&quot;) == &quot;f_f_i&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;Aacute_V.swash&quot;) == &quot;A_acute_V_.swash&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;.notdef&quot;) == &quot;_notdef&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;con&quot;) == &quot;_con&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;CON&quot;) == &quot;C_O_N_&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;con.alt&quot;) == &quot;_con.alt&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&gt;&gt;&gt; userNameToFileName(&quot;alt.con&quot;) == &quot;alt._con&quot;</span>
<span class="sd">	True</span>
<span class="sd">	&quot;&quot;&quot;</span>
	<span class="c1"># the incoming name must be a unicode string</span>
	<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">userName</span><span class="p">,</span> <span class="n">unicode</span><span class="p">):</span>
		<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">&quot;The value for userName must be a unicode string.&quot;</span><span class="p">)</span>
	<span class="c1"># establish the prefix and suffix lengths</span>
	<span class="n">prefixLength</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span>
	<span class="n">suffixLength</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">suffix</span><span class="p">)</span>
	<span class="c1"># replace an initial period with an _</span>
	<span class="c1"># if no prefix is to be added</span>
	<span class="k">if</span> <span class="ow">not</span> <span class="n">prefix</span> <span class="ow">and</span> <span class="n">userName</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s2">&quot;.&quot;</span><span class="p">:</span>
		<span class="n">userName</span> <span class="o">=</span> <span class="s2">&quot;_&quot;</span> <span class="o">+</span> <span class="n">userName</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span>
	<span class="c1"># filter the user name</span>
	<span class="n">filteredUserName</span> <span class="o">=</span> <span class="p">[]</span>
	<span class="k">for</span> <span class="n">character</span> <span class="ow">in</span> <span class="n">userName</span><span class="p">:</span>
		<span class="c1"># replace illegal characters with _</span>
		<span class="k">if</span> <span class="n">character</span> <span class="ow">in</span> <span class="n">illegalCharacters</span><span class="p">:</span>
			<span class="n">character</span> <span class="o">=</span> <span class="s2">&quot;_&quot;</span>
		<span class="c1"># add _ to all non-lower characters</span>
		<span class="k">elif</span> <span class="n">character</span> <span class="o">!=</span> <span class="n">character</span><span class="o">.</span><span class="n">lower</span><span class="p">():</span>
			<span class="n">character</span> <span class="o">+=</span> <span class="s2">&quot;_&quot;</span>
		<span class="n">filteredUserName</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">character</span><span class="p">)</span>
	<span class="n">userName</span> <span class="o">=</span> <span class="s2">&quot;&quot;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">filteredUserName</span><span class="p">)</span>
	<span class="c1"># clip to 255</span>
	<span class="n">sliceLength</span> <span class="o">=</span> <span class="n">maxFileNameLength</span> <span class="o">-</span> <span class="n">prefixLength</span> <span class="o">-</span> <span class="n">suffixLength</span>
	<span class="n">userName</span> <span class="o">=</span> <span class="n">userName</span><span class="p">[:</span><span class="n">sliceLength</span><span class="p">]</span>
	<span class="c1"># test for illegal files names</span>
	<span class="n">parts</span> <span class="o">=</span> <span class="p">[]</span>
	<span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">userName</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">&quot;.&quot;</span><span class="p">):</span>
		<span class="k">if</span> <span class="n">part</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="ow">in</span> <span class="n">reservedFileNames</span><span class="p">:</span>
			<span class="n">part</span> <span class="o">=</span> <span class="s2">&quot;_&quot;</span> <span class="o">+</span> <span class="n">part</span>
		<span class="n">parts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">part</span><span class="p">)</span>
	<span class="n">userName</span> <span class="o">=</span> <span class="s2">&quot;.&quot;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parts</span><span class="p">)</span>
	<span class="c1"># test for clash</span>
	<span class="n">fullName</span> <span class="o">=</span> <span class="n">prefix</span> <span class="o">+</span> <span class="n">userName</span> <span class="o">+</span> <span class="n">suffix</span>
	<span class="k">if</span> <span class="n">fullName</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="ow">in</span> <span class="n">existing</span><span class="p">:</span>
		<span class="n">fullName</span> <span class="o">=</span> <span class="n">handleClash1</span><span class="p">(</span><span class="n">userName</span><span class="p">,</span> <span class="n">existing</span><span class="p">,</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">suffix</span><span class="p">)</span>
	<span class="c1"># finished</span>
	<span class="k">return</span> <span class="n">fullName</span></div>

<div class="viewcode-block" id="handleClash1"><a class="viewcode-back" href="../../ufoLib/filenames.html#ufoLib.filenames.handleClash1">[docs]</a><span class="k">def</span> <span class="nf">handleClash1</span><span class="p">(</span><span class="n">userName</span><span class="p">,</span> <span class="n">existing</span><span class="o">=</span><span class="p">[],</span> <span class="n">prefix</span><span class="o">=</span><span class="s2">&quot;&quot;</span><span class="p">,</span> <span class="n">suffix</span><span class="o">=</span><span class="s2">&quot;&quot;</span><span class="p">):</span>
	<span class="sd">&quot;&quot;&quot;</span>
<span class="sd">	existing should be a case-insensitive list</span>
<span class="sd">	of all existing file names.</span>

<span class="sd">	&gt;&gt;&gt; prefix = (&quot;0&quot; * 5) + &quot;.&quot;</span>
<span class="sd">	&gt;&gt;&gt; suffix = &quot;.&quot; + (&quot;0&quot; * 10)</span>
<span class="sd">	&gt;&gt;&gt; existing = [&quot;a&quot; * 5]</span>

<span class="sd">	&gt;&gt;&gt; e = list(existing)</span>
<span class="sd">	&gt;&gt;&gt; handleClash1(userName=&quot;A&quot; * 5, existing=e,</span>
<span class="sd">	...		prefix=prefix, suffix=suffix) == (</span>
<span class="sd">	... 	&#39;00000.AAAAA000000000000001.0000000000&#39;)</span>
<span class="sd">	True</span>

<span class="sd">	&gt;&gt;&gt; e = list(existing)</span>
<span class="sd">	&gt;&gt;&gt; e.append(prefix + &quot;aaaaa&quot; + &quot;1&quot;.zfill(15) + suffix)</span>
<span class="sd">	&gt;&gt;&gt; handleClash1(userName=&quot;A&quot; * 5, existing=e,</span>
<span class="sd">	...		prefix=prefix, suffix=suffix) == (</span>
<span class="sd">	... 	&#39;00000.AAAAA000000000000002.0000000000&#39;)</span>
<span class="sd">	True</span>

<span class="sd">	&gt;&gt;&gt; e = list(existing)</span>
<span class="sd">	&gt;&gt;&gt; e.append(prefix + &quot;AAAAA&quot; + &quot;2&quot;.zfill(15) + suffix)</span>
<span class="sd">	&gt;&gt;&gt; handleClash1(userName=&quot;A&quot; * 5, existing=e,</span>
<span class="sd">	...		prefix=prefix, suffix=suffix) == (</span>
<span class="sd">	... 	&#39;00000.AAAAA000000000000001.0000000000&#39;)</span>
<span class="sd">	True</span>
<span class="sd">	&quot;&quot;&quot;</span>
	<span class="c1"># if the prefix length + user name length + suffix length + 15 is at</span>
	<span class="c1"># or past the maximum length, silce 15 characters off of the user name</span>
	<span class="n">prefixLength</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span>
	<span class="n">suffixLength</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">suffix</span><span class="p">)</span>
	<span class="k">if</span> <span class="n">prefixLength</span> <span class="o">+</span> <span class="nb">len</span><span class="p">(</span><span class="n">userName</span><span class="p">)</span> <span class="o">+</span> <span class="n">suffixLength</span> <span class="o">+</span> <span class="mi">15</span> <span class="o">&gt;</span> <span class="n">maxFileNameLength</span><span class="p">:</span>
		<span class="n">l</span> <span class="o">=</span> <span class="p">(</span><span class="n">prefixLength</span> <span class="o">+</span> <span class="nb">len</span><span class="p">(</span><span class="n">userName</span><span class="p">)</span> <span class="o">+</span> <span class="n">suffixLength</span> <span class="o">+</span> <span class="mi">15</span><span class="p">)</span>
		<span class="n">sliceLength</span> <span class="o">=</span> <span class="n">maxFileNameLength</span> <span class="o">-</span> <span class="n">l</span>
		<span class="n">userName</span> <span class="o">=</span> <span class="n">userName</span><span class="p">[:</span><span class="n">sliceLength</span><span class="p">]</span>
	<span class="n">finalName</span> <span class="o">=</span> <span class="kc">None</span>
	<span class="c1"># try to add numbers to create a unique name</span>
	<span class="n">counter</span> <span class="o">=</span> <span class="mi">1</span>
	<span class="k">while</span> <span class="n">finalName</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
		<span class="n">name</span> <span class="o">=</span> <span class="n">userName</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">counter</span><span class="p">)</span><span class="o">.</span><span class="n">zfill</span><span class="p">(</span><span class="mi">15</span><span class="p">)</span>
		<span class="n">fullName</span> <span class="o">=</span> <span class="n">prefix</span> <span class="o">+</span> <span class="n">name</span> <span class="o">+</span> <span class="n">suffix</span>
		<span class="k">if</span> <span class="n">fullName</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">existing</span><span class="p">:</span>
			<span class="n">finalName</span> <span class="o">=</span> <span class="n">fullName</span>
			<span class="k">break</span>
		<span class="k">else</span><span class="p">:</span>
			<span class="n">counter</span> <span class="o">+=</span> <span class="mi">1</span>
		<span class="k">if</span> <span class="n">counter</span> <span class="o">&gt;=</span> <span class="mi">999999999999999</span><span class="p">:</span>
			<span class="k">break</span>
	<span class="c1"># if there is a clash, go to the next fallback</span>
	<span class="k">if</span> <span class="n">finalName</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
		<span class="n">finalName</span> <span class="o">=</span> <span class="n">handleClash2</span><span class="p">(</span><span class="n">existing</span><span class="p">,</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">suffix</span><span class="p">)</span>
	<span class="c1"># finished</span>
	<span class="k">return</span> <span class="n">finalName</span></div>

<div class="viewcode-block" id="handleClash2"><a class="viewcode-back" href="../../ufoLib/filenames.html#ufoLib.filenames.handleClash2">[docs]</a><span class="k">def</span> <span class="nf">handleClash2</span><span class="p">(</span><span class="n">existing</span><span class="o">=</span><span class="p">[],</span> <span class="n">prefix</span><span class="o">=</span><span class="s2">&quot;&quot;</span><span class="p">,</span> <span class="n">suffix</span><span class="o">=</span><span class="s2">&quot;&quot;</span><span class="p">):</span>
	<span class="sd">&quot;&quot;&quot;</span>
<span class="sd">	existing should be a case-insensitive list</span>
<span class="sd">	of all existing file names.</span>

<span class="sd">	&gt;&gt;&gt; prefix = (&quot;0&quot; * 5) + &quot;.&quot;</span>
<span class="sd">	&gt;&gt;&gt; suffix = &quot;.&quot; + (&quot;0&quot; * 10)</span>
<span class="sd">	&gt;&gt;&gt; existing = [prefix + str(i) + suffix for i in range(100)]</span>

<span class="sd">	&gt;&gt;&gt; e = list(existing)</span>
<span class="sd">	&gt;&gt;&gt; handleClash2(existing=e, prefix=prefix, suffix=suffix) == (</span>
<span class="sd">	... 	&#39;00000.100.0000000000&#39;)</span>
<span class="sd">	True</span>

<span class="sd">	&gt;&gt;&gt; e = list(existing)</span>
<span class="sd">	&gt;&gt;&gt; e.remove(prefix + &quot;1&quot; + suffix)</span>
<span class="sd">	&gt;&gt;&gt; handleClash2(existing=e, prefix=prefix, suffix=suffix) == (</span>
<span class="sd">	... 	&#39;00000.1.0000000000&#39;)</span>
<span class="sd">	True</span>

<span class="sd">	&gt;&gt;&gt; e = list(existing)</span>
<span class="sd">	&gt;&gt;&gt; e.remove(prefix + &quot;2&quot; + suffix)</span>
<span class="sd">	&gt;&gt;&gt; handleClash2(existing=e, prefix=prefix, suffix=suffix) == (</span>
<span class="sd">	... 	&#39;00000.2.0000000000&#39;)</span>
<span class="sd">	True</span>
<span class="sd">	&quot;&quot;&quot;</span>
	<span class="c1"># calculate the longest possible string</span>
	<span class="n">maxLength</span> <span class="o">=</span> <span class="n">maxFileNameLength</span> <span class="o">-</span> <span class="nb">len</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span> <span class="o">-</span> <span class="nb">len</span><span class="p">(</span><span class="n">suffix</span><span class="p">)</span>
	<span class="n">maxValue</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="s2">&quot;9&quot;</span> <span class="o">*</span> <span class="n">maxLength</span><span class="p">)</span>
	<span class="c1"># try to find a number</span>
	<span class="n">finalName</span> <span class="o">=</span> <span class="kc">None</span>
	<span class="n">counter</span> <span class="o">=</span> <span class="mi">1</span>
	<span class="k">while</span> <span class="n">finalName</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
		<span class="n">fullName</span> <span class="o">=</span> <span class="n">prefix</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">counter</span><span class="p">)</span> <span class="o">+</span> <span class="n">suffix</span>
		<span class="k">if</span> <span class="n">fullName</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">existing</span><span class="p">:</span>
			<span class="n">finalName</span> <span class="o">=</span> <span class="n">fullName</span>
			<span class="k">break</span>
		<span class="k">else</span><span class="p">:</span>
			<span class="n">counter</span> <span class="o">+=</span> <span class="mi">1</span>
		<span class="k">if</span> <span class="n">counter</span> <span class="o">&gt;=</span> <span class="n">maxValue</span><span class="p">:</span>
			<span class="k">break</span>
	<span class="c1"># raise an error if nothing has been found</span>
	<span class="k">if</span> <span class="n">finalName</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
		<span class="k">raise</span> <span class="n">NameTranslationError</span><span class="p">(</span><span class="s2">&quot;No unique name could be found.&quot;</span><span class="p">)</span>
	<span class="c1"># finished</span>
	<span class="k">return</span> <span class="n">finalName</span></div>

<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s2">&quot;__main__&quot;</span><span class="p">:</span>
	<span class="kn">import</span> <span class="nn">doctest</span>
	<span class="n">doctest</span><span class="o">.</span><span class="n">testmod</span><span class="p">()</span>
</pre></div>

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