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225 lines
6.5 KiB
225 lines
6.5 KiB
'use strict';
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exports.type = 'perItem';
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exports.active = true;
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exports.description = 'removes hidden elements (zero sized, with absent attributes)';
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exports.params = {
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isHidden: true,
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displayNone: true,
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opacity0: true,
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circleR0: true,
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ellipseRX0: true,
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ellipseRY0: true,
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rectWidth0: true,
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rectHeight0: true,
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patternWidth0: true,
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patternHeight0: true,
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imageWidth0: true,
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imageHeight0: true,
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pathEmptyD: true,
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polylineEmptyPoints: true,
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polygonEmptyPoints: true
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};
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var regValidPath = /M\s*(?:[-+]?(?:\d*\.\d+|\d+(?:\.|(?!\.)))([eE][-+]?\d+)?(?!\d)\s*,?\s*){2}\D*\d/i;
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/**
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* Remove hidden elements with disabled rendering:
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* - display="none"
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* - opacity="0"
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* - circle with zero radius
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* - ellipse with zero x-axis or y-axis radius
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* - rectangle with zero width or height
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* - pattern with zero width or height
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* - image with zero width or height
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* - path with empty data
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* - polyline with empty points
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* - polygon with empty points
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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 Kir Belevich
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*/
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exports.fn = function (item, params) {
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if (item.elem) {
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// Removes hidden elements
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// https://www.w3schools.com/cssref/pr_class_visibility.asp
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if (
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params.isHidden &&
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item.hasAttr('visibility', 'hidden')
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) return false;
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// display="none"
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//
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// http://www.w3.org/TR/SVG/painting.html#DisplayProperty
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// "A value of display: none indicates that the given element
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// and its children shall not be rendered directly"
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if (
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params.displayNone &&
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item.hasAttr('display', 'none')
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) return false;
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// opacity="0"
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//
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// http://www.w3.org/TR/SVG/masking.html#ObjectAndGroupOpacityProperties
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if (
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params.opacity0 &&
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item.hasAttr('opacity', '0')
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) return false;
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// Circles with zero radius
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//
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// http://www.w3.org/TR/SVG/shapes.html#CircleElementRAttribute
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// "A value of zero disables rendering of the element"
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//
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// <circle r="0">
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if (
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params.circleR0 &&
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item.isElem('circle') &&
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item.isEmpty() &&
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item.hasAttr('r', '0')
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) return false;
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// Ellipse with zero x-axis radius
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//
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// http://www.w3.org/TR/SVG/shapes.html#EllipseElementRXAttribute
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// "A value of zero disables rendering of the element"
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//
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// <ellipse rx="0">
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if (
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params.ellipseRX0 &&
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item.isElem('ellipse') &&
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item.isEmpty() &&
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item.hasAttr('rx', '0')
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) return false;
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// Ellipse with zero y-axis radius
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//
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// http://www.w3.org/TR/SVG/shapes.html#EllipseElementRYAttribute
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// "A value of zero disables rendering of the element"
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//
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// <ellipse ry="0">
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if (
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params.ellipseRY0 &&
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item.isElem('ellipse') &&
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item.isEmpty() &&
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item.hasAttr('ry', '0')
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) return false;
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// Rectangle with zero width
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//
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// http://www.w3.org/TR/SVG/shapes.html#RectElementWidthAttribute
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// "A value of zero disables rendering of the element"
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//
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// <rect width="0">
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if (
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params.rectWidth0 &&
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item.isElem('rect') &&
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item.isEmpty() &&
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item.hasAttr('width', '0')
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) return false;
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// Rectangle with zero height
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//
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// http://www.w3.org/TR/SVG/shapes.html#RectElementHeightAttribute
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// "A value of zero disables rendering of the element"
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//
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// <rect height="0">
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if (
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params.rectHeight0 &&
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params.rectWidth0 &&
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item.isElem('rect') &&
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item.isEmpty() &&
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item.hasAttr('height', '0')
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) return false;
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// Pattern with zero width
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//
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// http://www.w3.org/TR/SVG/pservers.html#PatternElementWidthAttribute
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// "A value of zero disables rendering of the element (i.e., no paint is applied)"
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//
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// <pattern width="0">
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if (
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params.patternWidth0 &&
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item.isElem('pattern') &&
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item.hasAttr('width', '0')
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) return false;
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// Pattern with zero height
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//
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// http://www.w3.org/TR/SVG/pservers.html#PatternElementHeightAttribute
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// "A value of zero disables rendering of the element (i.e., no paint is applied)"
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//
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// <pattern height="0">
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if (
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params.patternHeight0 &&
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item.isElem('pattern') &&
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item.hasAttr('height', '0')
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) return false;
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// Image with zero width
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//
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// http://www.w3.org/TR/SVG/struct.html#ImageElementWidthAttribute
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// "A value of zero disables rendering of the element"
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//
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// <image width="0">
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if (
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params.imageWidth0 &&
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item.isElem('image') &&
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item.hasAttr('width', '0')
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) return false;
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// Image with zero height
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//
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// http://www.w3.org/TR/SVG/struct.html#ImageElementHeightAttribute
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// "A value of zero disables rendering of the element"
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//
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// <image height="0">
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if (
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params.imageHeight0 &&
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item.isElem('image') &&
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item.hasAttr('height', '0')
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) return false;
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// Path with empty data
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//
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// http://www.w3.org/TR/SVG/paths.html#DAttribute
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//
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// <path d=""/>
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if (
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params.pathEmptyD &&
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item.isElem('path') &&
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(!item.hasAttr('d') || !regValidPath.test(item.attr('d').value))
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) return false;
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// Polyline with empty points
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//
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// http://www.w3.org/TR/SVG/shapes.html#PolylineElementPointsAttribute
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//
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// <polyline points="">
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if (
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params.polylineEmptyPoints &&
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item.isElem('polyline') &&
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!item.hasAttr('points')
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) return false;
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// Polygon with empty points
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//
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// http://www.w3.org/TR/SVG/shapes.html#PolygonElementPointsAttribute
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//
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// <polygon points="">
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if (
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params.polygonEmptyPoints &&
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item.isElem('polygon') &&
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!item.hasAttr('points')
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) return false;
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}
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};
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