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<h1>Tidy or &quot;Pretty Print&quot; HTML/XHTML Documents</h1>
</div>
<div class="row">
<div class="col-md-9">
<p>Pass in HTML content as either plain or raw text or parsed objects (either with the
<code>XML</code> or <code>xml2</code> packages) or as an <code>httr</code> <code>response</code> object
along with an options list that specifies how the content will be tidied and get back
tidied content of the same object type as passed in to the function.</p>
<pre><span class='co'># S3 method for response</span>
<span class='fu'>tidy_html</span>(<span class='no'>content</span>, <span class='kw'>options</span> <span class='kw'>=</span> <span class='fu'>list</span>(<span class='kw'>TidyXhtmlOut</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>),
<span class='kw'>verbose</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)
<span class='fu'>tidy_html</span>(<span class='no'>content</span>, <span class='kw'>options</span> <span class='kw'>=</span> <span class='fu'>list</span>(<span class='kw'>TidyXhtmlOut</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>), <span class='kw'>verbose</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)
<span class='co'># S3 method for default</span>
<span class='fu'>tidy_html</span>(<span class='no'>content</span>, <span class='kw'>options</span> <span class='kw'>=</span> <span class='fu'>list</span>(<span class='kw'>TidyXhtmlOut</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>),
<span class='kw'>verbose</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)
<span class='co'># S3 method for character</span>
<span class='fu'>tidy_html</span>(<span class='no'>content</span>, <span class='kw'>options</span> <span class='kw'>=</span> <span class='fu'>list</span>(<span class='kw'>TidyXhtmlOut</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>),
<span class='kw'>verbose</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)
<span class='co'># S3 method for raw</span>
<span class='fu'>tidy_html</span>(<span class='no'>content</span>, <span class='kw'>options</span> <span class='kw'>=</span> <span class='fu'>list</span>(<span class='kw'>TidyXhtmlOut</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>),
<span class='kw'>verbose</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)
<span class='co'># S3 method for xml_document</span>
<span class='fu'>tidy_html</span>(<span class='no'>content</span>, <span class='kw'>options</span> <span class='kw'>=</span> <span class='fu'>list</span>(<span class='kw'>TidyXhtmlOut</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>),
<span class='kw'>verbose</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)
<span class='co'># S3 method for HTMLInternalDocument</span>
<span class='fu'>tidy_html</span>(<span class='no'>content</span>, <span class='kw'>options</span> <span class='kw'>=</span> <span class='fu'>list</span>(<span class='kw'>TidyXhtmlOut</span>
<span class='kw'>=</span> <span class='fl'>TRUE</span>), <span class='kw'>verbose</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)
<span class='co'># S3 method for connection</span>
<span class='fu'>tidy_html</span>(<span class='no'>content</span>, <span class='kw'>options</span> <span class='kw'>=</span> <span class='fu'>list</span>(<span class='kw'>TidyXhtmlOut</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>),
<span class='kw'>verbose</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>)</pre>
<h2>Arguments</h2>
<dl class="dl-horizontal">
<dt>content</dt>
<dd>accepts a character vector, raw vector or parsed content from the <code>xml2</code>
or <code>XML</code> packages.</dd>
<dt>options</dt>
<dd>named list of options</dd>
<dt>verbose</dt>
<dd>output document errors? (default: <code>FALSE</code>)</dd>
</dl>
<div class="Value">
<h2>Value</h2>
<p>Tidied HTML/XHTML content. The object type will be the same as that of the input type
except when it is a <code>connection</code>, then a character vector will be returned.</p>
</div>
<div class="Details">
<h2>Details</h2>
<p>The default option <code>TixyXhtmlOut</code> will convert the input content to XHTML.</p>
<p>Currently supported options:</p>
<p><ul>
<li>Ones taking a logical value: <code>TidyAltText</code>, <code>TidyBodyOnly</code>, <code>TidyBreakBeforeBR</code>,
<code>TidyCoerceEndTags</code>, <code>TidyDropEmptyElems</code>, <code>TidyDropEmptyParas</code>,
<code>TidyFixBackslash</code>, <code>TidyFixComments</code>, <code>TidyGDocClean</code>, <code>TidyHideComments</code>,
<code>TidyHtmlOut</code>, <code>TidyIndentContent</code>, <code>TidyJoinClasses</code>, <code>TidyJoinStyles</code>,
<code>TidyLogicalEmphasis</code>, <code>TidyMakeBare</code>, <code>TidyMakeClean</code>, <code>TidyMark</code>,
<code>TidyOmitOptionalTags</code>, <code>TidyReplaceColor</code>, <code>TidyUpperCaseAttrs</code>,
<code>TidyUpperCaseTags</code>, <code>TidyWord2000</code>, <code>TidyXhtmlOut</code>
</li>
<li>Ones taking a character value: <code>TidyDoctype</code>, <code>TidyInlineTags</code>, <code>TidyBlockTags</code>,
<code>TidyEmptyTags</code>, <code>TidyPreTags</code>
</li>
<li>Ones taking an integer value: <code>TidyIndentSpaces</code>, <code>TidyTabSize</code>, <code>TidyWrapLen</code>
</li>
</ul></p>
<p>File <a href = 'an issue'>https://github.com/hrbrmstr/htmltidy/issues</a> if there are other <code>libtidy</code>
options you&#39;d like supported.</p>
<p>It is likely that the most used options will be:</p>
<p><ul>
<li><code>TidyXhtmlOut</code> (logical),
</li>
<li><code>TidyHtmlOut</code> (logical) and
</li>
<li><code>TidyDocType</code> which should be one of &quot;<code>omit</code>&quot;,
&quot;<code>html5</code>&quot;, &quot;<code>auto</code>&quot;, &quot;<code>strict</code>&quot; or &quot;<code>loose</code>&quot;.
</li>
</ul></p>
<p>You can clean up Microsoft Word (2000) and Google Docs HTML via logical settings for
<code>TidyWord2000</code> and <code>TidyGDocClean</code>, respectively.</p>
<p>It may also be advantageous to remove all comments with <code>TidyHideComments</code>.</p>
</div>
<div class="Note">
<h2>Note</h2>
<p>If document parsing errors are severe enough, <code>tidy_html()</code> will not be able
to clean the document and will display the errors (this output can be captured with
<code>sink()</code> or <code>capture.output()</code>) along with a warning and return a &quot;best effort&quot;
cleaned version of the document.</p>
</div>
<div class="References">
<h2>References</h2>
<p><a href = 'http://api.html-tidy.org/tidy/quickref_5.1.25.html'>http://api.html-tidy.org/tidy/quickref_5.1.25.html</a> &amp;
<a href = 'https://github.com/htacg/tidy-html5/blob/master/include/tidyenum.h'>https://github.com/htacg/tidy-html5/blob/master/include/tidyenum.h</a>
for definitions of the options supported above and <a href = 'https://www.w3.org/People/Raggett/tidy/'>https://www.w3.org/People/Raggett/tidy/</a>
for an explanation of what &quot;tidy&quot; HTML is and some canonical examples of what it can do.</p>
</div>
<h2 id="examples">Examples</h2>
<pre class="examples"><div class='input'><span class='no'>opts</span> <span class='kw'>&lt;-</span> <span class='fu'>list</span>(
<span class='kw'>TidyDocType</span><span class='kw'>=</span><span class='st'>"html5"</span>,
<span class='kw'>TidyMakeClean</span><span class='kw'>=</span><span class='fl'>TRUE</span>,
<span class='kw'>TidyHideComments</span><span class='kw'>=</span><span class='fl'>TRUE</span>,
<span class='kw'>TidyIndentContent</span><span class='kw'>=</span><span class='fl'>TRUE</span>,
<span class='kw'>TidyWrapLen</span><span class='kw'>=</span><span class='fl'>200</span>
)
<span class='no'>txt</span> <span class='kw'>&lt;-</span> <span class='fu'>paste0</span>(
<span class='fu'>c</span>(<span class='st'>"&lt;html&gt;&lt;head&gt;&lt;style&gt;p { color: red; }&lt;/style&gt;&lt;body&gt;&lt;!-- ===== body ====== --&gt;"</span>,
<span class='st'>"&lt;p&gt;Test&lt;/p&gt;&lt;/body&gt;&lt;!--Default Zone --&gt; &lt;!--Default Zone End--&gt;&lt;/html&gt;"</span>),
<span class='kw'>collapse</span><span class='kw'>=</span><span class='st'>""</span>)
<span class='fu'>cat</span>(<span class='fu'>tidy_html</span>(<span class='no'>txt</span>, <span class='kw'>option</span><span class='kw'>=</span><span class='no'>opts</span>))</div><div class='output co'>#&gt; &lt;!DOCTYPE html&gt;
#&gt; &lt;html&gt;
#&gt; &lt;head&gt;
#&gt; &lt;meta name=&quot;generator&quot; content=&quot;HTML Tidy for HTML5 for R version 5.0.0&quot;&gt;
#&gt; &lt;style&gt;
#&gt; p { color: red; }
#&gt; &lt;/style&gt;
#&gt; &lt;title&gt;&lt;/title&gt;
#&gt; &lt;/head&gt;
#&gt; &lt;body&gt;
#&gt; &lt;p&gt;
#&gt; Test
#&gt; &lt;/p&gt;
#&gt; &lt;/body&gt;
#&gt; &lt;/html&gt;
#&gt; </div><div class='input'>
<span class='fu'>library</span>(<span class='no'>httr</span>)
<span class='no'>res</span> <span class='kw'>&lt;-</span> <span class='fu'>GET</span>(<span class='st'>"http://rud.is/test/untidy.html"</span>)
<span class='co'># look at the original, un-tidy source</span>
<span class='fu'>cat</span>(<span class='fu'>content</span>(<span class='no'>res</span>, <span class='kw'>as</span><span class='kw'>=</span><span class='st'>"text"</span>, <span class='kw'>encoding</span><span class='kw'>=</span><span class='st'>"UTF-8"</span>))</div><div class='output co'>#&gt; &lt;head&gt;
#&gt; &lt;style&gt;
#&gt; body { font-family: sans-serif; }
#&gt; &lt;/style&gt;
#&gt; &lt;/head&gt;
#&gt; &lt;body&gt;
#&gt; &lt;b&gt;This is &lt;b&gt;some &lt;i&gt;really &lt;/i&gt; poorly formatted HTML&lt;/b&gt;
#&gt;
#&gt; as is this &lt;span id=&quot;sp&quot;&gt;portion&lt;div&gt;
#&gt; </div><div class='input'>
<span class='co'># see the tidied version</span>
<span class='fu'>cat</span>(<span class='fu'>tidy_html</span>(<span class='fu'>content</span>(<span class='no'>res</span>, <span class='kw'>as</span><span class='kw'>=</span><span class='st'>"text"</span>, <span class='kw'>encoding</span><span class='kw'>=</span><span class='st'>"UTF-8"</span>),
<span class='fu'>list</span>(<span class='kw'>TidyDocType</span><span class='kw'>=</span><span class='st'>"html5"</span>, <span class='kw'>TidyWrapLen</span><span class='kw'>=</span><span class='fl'>200</span>)))</div><div class='output co'>#&gt; &lt;!DOCTYPE html&gt;
#&gt; &lt;html&gt;
#&gt; &lt;head&gt;
#&gt; &lt;meta name=&quot;generator&quot; content=&quot;HTML Tidy for HTML5 for R version 5.0.0&quot;&gt;
#&gt; &lt;style&gt;
#&gt; body { font-family: sans-serif; }
#&gt; &lt;/style&gt;
#&gt; &lt;title&gt;&lt;/title&gt;
#&gt; &lt;/head&gt;
#&gt; &lt;body&gt;
#&gt; &lt;b&gt;This is some &lt;i&gt;really&lt;/i&gt; poorly formatted HTML as is this &lt;span id=&quot;sp&quot;&gt;portion&lt;/span&gt;&lt;/b&gt;
#&gt; &lt;div&gt;&lt;span id=&quot;sp&quot;&gt;&lt;/span&gt;&lt;/div&gt;
#&gt; &lt;/body&gt;
#&gt; &lt;/html&gt;
#&gt; </div><div class='input'>
<span class='co'># but, you could also just do:</span>
<span class='fu'>cat</span>(<span class='fu'>tidy_html</span>(<span class='fu'>url</span>(<span class='st'>"http://rud.is/test/untidy.html"</span>)))</div><div class='output co'>#&gt; &lt;!DOCTYPE html&gt;
#&gt; &lt;html xmlns=&quot;http://www.w3.org/1999/xhtml&quot;&gt;
#&gt; &lt;head&gt;
#&gt; &lt;meta name=&quot;generator&quot; content=
#&gt; &quot;HTML Tidy for HTML5 for R version 5.0.0&quot; /&gt;
#&gt; &lt;style&gt;
#&gt; &lt;![CDATA[
#&gt; body { font-family: sans-serif; }
#&gt; ]]&gt;
#&gt; &lt;/style&gt;
#&gt; &lt;title&gt;&lt;/title&gt;
#&gt; &lt;/head&gt;
#&gt; &lt;body&gt;
#&gt; &lt;b&gt;This is some &lt;i&gt;really&lt;/i&gt; poorly formatted HTMLas is this
#&gt; &lt;span id=&quot;sp&quot;&gt;portion&lt;/span&gt;&lt;/b&gt;
#&gt; &lt;div&gt;&lt;span id=&quot;sp&quot;&gt;&lt;/span&gt;&lt;/div&gt;
#&gt; &lt;/body&gt;
#&gt; &lt;/html&gt;
#&gt; </div></pre>
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