initial commit

node_modules/svgo/plugins/convertShapeToPath.js

@@ -0,0 +1,149 @@
+'use strict';
+
+exports.type = 'perItem';
+
+exports.active = true;
+
+exports.description = 'converts basic shapes to more compact path form';
+
+exports.params = {
+    convertArcs: false
+};
+
+var none = { value: 0 },
+    regNumber = /[-+]?(?:\d*\.\d+|\d+\.?)(?:[eE][-+]?\d+)?/g;
+
+/**
+ * Converts basic shape to more compact path.
+ * It also allows further optimizations like
+ * combining paths with similar attributes.
+ *
+ * @see http://www.w3.org/TR/SVG/shapes.html
+ *
+ * @param {Object} item current iteration item
+ * @param {Object} params plugin params
+ * @return {Boolean} if false, item will be filtered out
+ *
+ * @author Lev Solntsev
+ */
+exports.fn = function(item, params) {
+    var convertArcs = params && params.convertArcs;
+
+    if (
+        item.isElem('rect') &&
+        item.hasAttr('width') &&
+        item.hasAttr('height') &&
+        !item.hasAttr('rx') &&
+        !item.hasAttr('ry')
+    ) {
+
+        var x = +(item.attr('x') || none).value,
+            y = +(item.attr('y') || none).value,
+            width  = +item.attr('width').value,
+            height = +item.attr('height').value;
+
+            // Values like '100%' compute to NaN, thus running after
+            // cleanupNumericValues when 'px' units has already been removed.
+            // TODO: Calculate sizes from % and non-px units if possible.
+        if (isNaN(x - y + width - height)) return;
+
+        var pathData =
+            'M' + x + ' ' + y +
+            'H' + (x + width) +
+            'V' + (y + height) +
+            'H' + x +
+            'z';
+
+        item.addAttr({
+                name: 'd',
+                value: pathData,
+                prefix: '',
+                local: 'd'
+            });
+
+        item.renameElem('path')
+            .removeAttr(['x', 'y', 'width', 'height']);
+
+    } else if (item.isElem('line')) {
+
+        var x1 = +(item.attr('x1') || none).value,
+            y1 = +(item.attr('y1') || none).value,
+            x2 = +(item.attr('x2') || none).value,
+            y2 = +(item.attr('y2') || none).value;
+        if (isNaN(x1 - y1 + x2 - y2)) return;
+
+        item.addAttr({
+                name: 'd',
+                value: 'M' + x1 + ' ' + y1 + 'L' + x2 + ' ' + y2,
+                prefix: '',
+                local: 'd'
+            });
+
+        item.renameElem('path')
+            .removeAttr(['x1', 'y1', 'x2', 'y2']);
+
+    } else if ((
+            item.isElem('polyline') ||
+            item.isElem('polygon')
+        ) &&
+        item.hasAttr('points')
+    ) {
+
+        var coords = (item.attr('points').value.match(regNumber) || []).map(Number);
+        if (coords.length < 4) return false;
+
+        item.addAttr({
+                name: 'd',
+                value: 'M' + coords.slice(0,2).join(' ') +
+                       'L' + coords.slice(2).join(' ') +
+                       (item.isElem('polygon') ? 'z' : ''),
+                prefix: '',
+                local: 'd'
+            });
+
+        item.renameElem('path')
+            .removeAttr('points');
+    } else if (item.isElem('circle') && convertArcs) {
+
+        var cx = +(item.attr('cx') || none).value;
+        var cy = +(item.attr('cy') || none).value;
+        var r = +(item.attr('r') || none).value;
+        if (isNaN(cx - cy + r)) {
+            return;
+        }
+        var cPathData =
+            'M' + cx  + ' ' + (cy - r) +
+                'A' + r + ' ' + r + ' 0 1 0 ' + cx + ' ' + (cy + r) +
+                'A' + r + ' ' + r + ' 0 1 0 ' + cx + ' ' + (cy - r) +
+                'Z';
+        item.addAttr({
+                name: 'd',
+                value: cPathData,
+                prefix: '',
+                local: 'd',
+        });
+        item.renameElem('path').removeAttr(['cx', 'cy', 'r']);
+
+    } else if (item.isElem('ellipse') && convertArcs) {
+
+        var ecx = +(item.attr('cx') || none).value;
+        var ecy = +(item.attr('cy') || none).value;
+        var rx = +(item.attr('rx') || none).value;
+        var ry = +(item.attr('ry') || none).value;
+        if (isNaN(ecx - ecy + rx - ry)) {
+            return;
+        }
+        var ePathData =
+            'M' + ecx + ' ' + (ecy - ry) +
+                'A' + rx + ' ' + ry + ' 0 1 0 ' + ecx + ' ' + (ecy + ry) +
+                'A' + rx + ' ' + ry + ' 0 1 0 ' + ecx + ' ' + (ecy - ry) +
+                'Z';
+        item.addAttr({
+                name: 'd',
+                value: ePathData,
+                prefix: '',
+                local: 'd',
+        });
+        item.renameElem('path').removeAttr(['cx', 'cy', 'rx', 'ry']);
+    }
+};