aaac7fed
 liuqimichale
add
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'use strict';
exports.type = 'perItem';
exports.active = true;
exports.description = 'converts basic shapes to more compact path form';
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) {
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');
}
};
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