Drafts Directory: Stats (selection)

Action

Posted by agiletortoise, Last update about 5 years ago

Calculate and present preview of common readability statistics for the current text selection.

Steps

script

// Make sure draft is not blank first...

let selectedText = editor.getSelectedText();
if (selectedText.length == 0) {
   alert("Empty text selection. Text required to calculate statistics.");
	context.cancel();
}

script

// Show alert displaying common text statistics for current draft
// Includes syllable counts, Flesh-Kincaid, SMOG index scoring, etc.

// adapted from...
// TextStatistics.js
// Christopher Giffard (2012)
// 1:1 API Fork of TextStatistics.php by Dave Child (Thanks mate!)
// https://github.com/DaveChild/Text-Statistics

// BEGIN LIBRARY	
function cleanText(text) {
	// all these tags should be preceeded by a full stop. 
	var fullStopTags = ['li', 'p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'dd'];
	
	fullStopTags.forEach(function(tag) {
		text = text.replace("</" + tag + ">",".");
	})
	
	text = text
		.replace(/<[^>]+>/g, "")				// Strip tags
		.replace(/[,:;()\-]/, " ")				// Replace commans, hyphens etc (count them as spaces)
		.replace(/[\.!?]/, ".")					// Unify terminators
		.replace(/^\s+/,"")						// Strip leading whitespace
		.replace(/[ ]*(\n|\r\n|\r)[ ]*/," ")	// Replace new lines with spaces
		.replace(/([\.])[\. ]+/,".")			// Check for duplicated terminators
		.replace(/[ ]*([\.])/,". ")				// Pad sentence terminators
		.replace(/\s+/," ")						// Remove multiple spaces
		.replace(/\s+$/,"");					// Strip trailing whitespace
		
	text += "."; // Add final terminator, just in case it's missing.
	
	return text;
}

var TextStatistics = function TextStatistics(text) {
	this.text = text ? cleanText(text) : this.text;
};

TextStatistics.prototype.fleschKincaidReadingEase = function(text) {
	text = text ? cleanText(text) : this.text;
	return Math.round((206.835 - (1.015 * this.averageWordsPerSentence(text)) - (84.6 * this.averageSyllablesPerWord(text)))*10)/10;
};

TextStatistics.prototype.fleschKincaidGradeLevel = function(text) {
	text = text ? cleanText(text) : this.text;
	return Math.round(((0.39 * this.averageWordsPerSentence(text)) + (11.8 * this.averageSyllablesPerWord(text)) - 15.59)*10)/10;
};

TextStatistics.prototype.gunningFogScore = function(text) {
	text = text ? cleanText(text) : this.text;
	return Math.round(((this.averageWordsPerSentence(text) + this.percentageWordsWithThreeSyllables(text, false)) * 0.4)*10)/10;
};

TextStatistics.prototype.colemanLiauIndex = function(text) {
	text = text ? cleanText(text) : this.text;
	return Math.round(((5.89 * (this.letterCount(text) / this.wordCount(text))) - (0.3 * (this.sentenceCount(text) / this.wordCount(text))) - 15.8 ) *10)/10;
};

TextStatistics.prototype.smogIndex = function(text) {
	text = text ? cleanText(text) : this.text;
	return Math.round(1.043 * Math.sqrt((this.wordsWithThreeSyllables(text) * (30 / this.sentenceCount(text))) + 3.1291)*10)/10;
};

TextStatistics.prototype.automatedReadabilityIndex = function(text) {
	text = text ? cleanText(text) : this.text;
	return Math.round(((4.71 * (this.letterCount(text) / this.wordCount(text))) + (0.5 * (this.wordCount(text) / this.sentenceCount(text))) - 21.43)*10)/10;
};

TextStatistics.prototype.textLength = function(text) {
	text = text ? cleanText(text) : this.text;
	return text.length;
};

TextStatistics.prototype.letterCount = function(text) {
	text = text ? cleanText(text) : this.text;
	text = text.replace(/[^a-z]+/ig,"");
	return text.length;
};

TextStatistics.prototype.sentenceCount = function(text) {
	text = text ? cleanText(text) : this.text;
	
	// Will be tripped up by "Mr." or "U.K.". Not a major concern at this point.
	return text.replace(/[^\.!?]/g, '').length || 1;
};

TextStatistics.prototype.wordCount = function(text) {
	text = text ? cleanText(text) : this.text;
	return text.split(/[^a-z0-9]+/i).length || 1;
};

TextStatistics.prototype.averageWordsPerSentence = function(text) {
	text = text ? cleanText(text) : this.text;
	return this.wordCount(text) / this.sentenceCount(text);
};

TextStatistics.prototype.averageSyllablesPerWord = function(text) {
	text = text ? cleanText(text) : this.text;
	var syllableCount = 0, wordCount = this.wordCount(text), self = this;
	
	text.split(/\s+/).forEach(function(word) {
		syllableCount += self.syllableCount(word);
	});
	
	// Prevent NaN...
	return (syllableCount||1) / (wordCount||1);
};

TextStatistics.prototype.wordsWithThreeSyllables = function(text, countProperNouns) {
	text = text ? cleanText(text) : this.text;
	var longWordCount = 0, self = this;
	
	countProperNouns = countProperNouns === false ? false : true;
	
	text.split(/\s+/).forEach(function(word) {
		
		// We don't count proper nouns or capitalised words if the countProperNouns attribute is set.
		// Defaults to true.
		if (!word.match(/^[A-Z]/) || countProperNouns) {
			if (self.syllableCount(word) > 2) longWordCount ++;
		}
	});
	
	return longWordCount;
};

TextStatistics.prototype.percentageWordsWithThreeSyllables = function(text, countProperNouns) {
	text = text ? cleanText(text) : this.text;
	
	return (this.wordsWithThreeSyllables(text,countProperNouns) / this.wordCount(text)) * 100;
};

TextStatistics.prototype.syllableCount = function(word) {
	var syllableCount = 0,
		prefixSuffixCount = 0,
		wordPartCount = 0;
	
	// Prepare word - make lower case and remove non-word characters
	word = word.toLowerCase().replace(/[^a-z]/g,"");

	// Specific common exceptions that don't follow the rule set below are handled individually
	// Array of problem words (with word as key, syllable count as value)
	var problemWords = {
		"simile":		3,
		"forever":		3,
		"shoreline":	2
	};
	
	// Return if we've hit one of those...
	if (problemWords.hasOwnProperty(word)) return problemWords[word];
	
	// These syllables would be counted as two but should be one
	var subSyllables = [
		/cial/,
		/tia/,
		/cius/,
		/cious/,
		/giu/,
		/ion/,
		/iou/,
		/sia$/,
		/[^aeiuoyt]{2,}ed$/,
		/.ely$/,
		/[cg]h?e[rsd]?$/,
		/rved?$/,
		/[aeiouy][dt]es?$/,
		/[aeiouy][^aeiouydt]e[rsd]?$/,
		/^[dr]e[aeiou][^aeiou]+$/, // Sorts out deal, deign etc
		/[aeiouy]rse$/ // Purse, hearse
	];

	// These syllables would be counted as one but should be two
	var addSyllables = [
		/ia/,
		/riet/,
		/dien/,
		/iu/,
		/io/,
		/ii/,
		/[aeiouym]bl$/,
		/[aeiou]{3}/,
		/^mc/,
		/ism$/,
		/([^aeiouy])\1l$/,
		/[^l]lien/,
		/^coa[dglx]./,
		/[^gq]ua[^auieo]/,
		/dnt$/,
		/uity$/,
		/ie(r|st)$/
	];

	// Single syllable prefixes and suffixes
	var prefixSuffix = [
		/^un/,
		/^fore/,
		/ly$/,
		/less$/,
		/ful$/,
		/ers?$/,
		/ings?$/
	];

	// Remove prefixes and suffixes and count how many were taken
	prefixSuffix.forEach(function(regex) {
		if (word.match(regex)) {
			word = word.replace(regex,"");
			prefixSuffixCount ++;
		}
	});
	
	wordPartCount = word
		.split(/[^aeiouy]+/ig)
		.filter(function(wordPart) {
			return !!wordPart.replace(/\s+/ig,"").length
		})
		.length;
	
	// Get preliminary syllable count...
	syllableCount = wordPartCount + prefixSuffixCount;
	
	// Some syllables do not follow normal rules - check for them
	subSyllables.forEach(function(syllable) {
		if (word.match(syllable)) syllableCount --;
	});
	
	addSyllables.forEach(function(syllable) {
		if (word.match(syllable)) syllableCount ++;
	});
	
	return syllableCount || 1;
};

function textStatistics(text) {
	return new TextStatistics(text);
}
// END LIBRARY
	

var result = "";
var s = selectedText;
var stats = textStatistics(s);

var t = ["<table>"];
function addRow(key, val, link) {
	t.push("<tr><td class='lbl'>");
	t.push(key);
	t.push("</td><td class='val'>");
	t.push(val);
	t.push("</td>");
	if (link) {
		t.push("<td>");
		t.push("<a href='" + link + "'>info</a>");
		t.push("</td>");
	}
	else {
		t.push("<td></td>");
	}
	t.push("</tr>")
}

addRow("Words", stats.wordCount());
addRow("Sentences", stats.sentenceCount());
addRow("Words per sentence", Math.round(stats.averageWordsPerSentence(), 2));
addRow("Flesch-Kincaid Ease", stats.fleschKincaidReadingEase(), "http://www.readabilityformulas.com/flesch-reading-ease-readability-formula.php");
addRow("Flesch-Kincaid Grade Level", stats.fleschKincaidGradeLevel(), "http://www.readabilityformulas.com/flesch-grade-level-readability-formula.php");
addRow("Gunning Fog", stats.gunningFogScore(), "https://en.wikipedia.org/wiki/Gunning_fog_index");
addRow("SMOG Index", stats.smogIndex(), "http://www.readabilityformulas.com/smog-readability-formula.php");
addRow("Automated Readability", stats.automatedReadabilityIndex(), "http://www.readabilityformulas.com/automated-readability-index.php");
addRow("Coleman Liau", stats.colemanLiauIndex(), "http://www.readabilityformulas.com/coleman-liau-readability-formula.php");

t.push("</table>");

draft.setTemplateTag("htmltable", t.join(""));

script

// create theme sensitive css for preview

if (app.themeMode == 'dark') {
	var css = "html, body { background: #222; color: #ddd; }";
	draft.setTemplateTag("bodystyle", css);
}
else {
	var css = "html, body { background: #fff; color: #444; }";
	draft.setTemplateTag("bodystyle", css);
}

htmlpreview

<!DOCTYPE html>
<html dir="auto">
    <head>
        <title>Preview</title>
		<meta name="viewport" content="width=device-width, initial-scale=1">
        <style>
        @import url(http://fonts.googleapis.com/css?family=Vollkorn:400,400italic,700,700italic&subset=latin);

        html, body {
                padding:0em;
                margin:auto;
                max-width:55em;
               text-align: center;
        	}
        body {
        	font: 1.3em "Vollkorn", Palatino, Times;
        	color: #333;
        	line-height: 1.4;
        	text-align: center;
        	}
        header, nav, article, footer {
        	width: 700px;
        	margin:0 auto;
        	}
        article {
        	margin-top: 4em;
        	margin-bottom: 4em;
        	min-height: 400px;
        	}
        footer {
        	margin-bottom:50px;
        	}
        video {
        	margin: 2em 0;
        	border:1px solid #ddd;
        	}

        nav {
        	font-size: .9em;
        	font-style: italic;
        	border-bottom: 1px solid #ddd;
        	padding: 1em 0;
        	}
        nav p {
        	margin: 0;
        	}

        /* Typography
        -------------------------------------------------------- */

        h1 {
        	margin-top: 0;
        	font-weight: normal;
        	}
        h2 {
        	font-weight: normal;
        	}
        h3 {
        	font-weight: normal;
        	font-style: italic;
        	margin-top:3em;
        	}
        p {
        	margin-top:0;
        	-webkit-hypens:auto;
        	-moz-hypens:auto;
        	hyphens:auto;
        	}
        ul {
        	list-style: square;
        	padding-left:1.2em;
        	}
        ol {
        	padding-left:1.2em;
        	}
        blockquote {
        	margin-left: 1em;
        	padding-left: 1em;
        	border-left: 1px solid #ddd;
        	}
        code {
        	font-family: "Consolas", "Menlo", "Monaco", monospace, serif;
        	font-size: .9em;
        	background: white;
        	}
        a {
        	color: #2484c1;
        	text-decoration: none;
        	}
        a:hover {
        	text-decoration: underline;
        	}
        a img {
        	border:none;
        	}
        h1 a, h1 a:hover {
        	color: #333;
        	text-decoration: none;
        	}
        hr {
        	color : #ddd;
        	height : 1px;
        	margin: 2em 0;
        	border-top : solid 1px #ddd;
        	border-bottom : none;
        	border-left: 0;
        	border-right: 0;
        	}
        p#heart{
        	font-size: 2em;
        	line-height: 1;
        	text-align: center;
        	color: #ccc;
        	}
        .red {
        	color:#B50000;
        	}
        img {
            max-width: 90%;
        }

table {
  margin: 1em auto;
  border: 1px solid #aaa;
  border-collapse: collapse;
}

th {
  padding:.25em .5em;
  background: #efefef;
  border: 1px solid #ccc;  
}

td {
  padding:.25em .5em;
  text-align: left;
  border: 1px solid #ccc;
}

        /* Home Page
        --------------------------- */

        body#index li {
        	margin-bottom: 1em;
        	}


        /* iPad
        -------------------------------------------------------- */
        @media only screen and (max-device-width: 1024px) {
        body {
        	font-size: 120%;
        	line-height: 1.4;
        	}
        } /* @iPad */

        /* iPhone
        -------------------------------------------------------- */
        @media only screen and (max-device-width: 480px) {
        body {
        	text-align: left;
            padding:.5em;
        	}
        article, footer {
        	width: auto;
        	}
        article {
        	padding: 0 10px;
        	}
        } /* @iPhone */

.lbl {
}
.val {
  font-weight: bold;
  text-align: right;
}

[[bodystyle]]
</style>
</head>
<body>
<h2>Draft Statistics</h2>
    [[htmltable]]
</body>
</html>

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