Initial commit

_includes/js/cloud-js.html

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+{%- comment -%}
+
+    Generates a subject cloud using js to process the terms for display on "cloud" layout.
+    Requires CB's array_count_uniq.rb plugin!
+
+{%- endcomment -%}
+{% if site.data.theme.browse-child-objects == true %}
+{%- assign items = site.data[site.metadata] | where_exp: 'item','item.objectid' -%}
+{% else %}
+{%- assign items = site.data[site.metadata] | where_exp: 'item','item.objectid and item.parentid == nil' -%}
+{% endif %}
+{%- assign termsMin = include.min | plus: 0 | default: 1 -%}
+{%- assign cloud_id = include.id | default: "cloud" -%}
+{%- assign cloud-fields = include.fields | split: ";" -%}
+
+{%- comment -%} capture terms from all cloud fields {%- endcomment -%}
+{%- assign terms = "" -%}
+{%- for c in cloud-fields -%}
+{% assign new = items | map: c | compact | join: ";" | split: ";" %}
+{% capture field_terms %}{% for n in new %}{{n}}~{{c}};{% endfor %}{% endcapture %}
+{% assign terms = terms | append: ";" | append: field_terms %}
+{%- endfor -%}
+{%- comment -%} find unique terms and counts {%- endcomment -%}
+{%- assign uniqTerms = terms | downcase | split: ";" | array_count_uniq | sort | where_exp: 't','t[1] >= termsMin' -%}
+
+<script>
+(function(){    
+    /* subject terms + count */
+    var terms = [
+        {% for t in uniqTerms %}{% assign term_field = t[0] | split: "~" %}[{{ term_field[0] | jsonify }}, {{ t[1] | jsonify }},{{term_field[1] | jsonify}}]{% unless forloop.last %}, {% endunless %}{% endfor %}
+    ];
+
+    {% if include.stopwords %}/* apply stopwords */
+    var stopWords = {{ include.stopwords | downcase | split: ';' | jsonify }};
+    terms = terms.filter(function(a) { return stopWords.indexOf(a[0]) < 0;});{% endif %}
+    /* calculate max size */
+    var counts = terms.map(function(obj){ return obj[1]; });
+    var countMax = counts.reduce(function(a, b) { return Math.max(a, b); });
+    var cloud = document.getElementById("{{ cloud_id }}");
+    {% if include.shuffle == true %}
+    /* Fisher-Yates shuffle https://bost.ocks.org/mike/shuffle/ */
+    function shuffle(array) {
+        var m = array.length, t, i;
+        while (m) {
+            i = Math.floor(Math.random() * m--);
+            t = array[m];
+            array[m] = array[i];
+            array[i] = t;
+        }
+        return array;
+    }
+    {% endif %}
+
+    function mapSize(x) { return Math.round(x * 9 / countMax + 1); }
+    /* create cloud */
+    function makeGrid(array) {
+        var i, size;
+        var items = "";
+        {% if include.shuffle == true %}shuffle(array);{% endif %}
+        for (let i = 0; i < array.length; i++) {
+            size = mapSize(array[i][1]);
+            items += '<a class="btn btn-{{ include.button | default: "outline-primary" }} m-2 tagcloud' + size + '" href="{{ "/browse.html" | relative_url }}#' + array[i][2] + ':' + encodeURIComponent(array[i][0]) + '" >' + array[i][0] + '</a>';
+        }
+        cloud.innerHTML = items;
+    }
+    makeGrid(terms);
+
+})();
+</script>