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