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terminal-cv/node_modules/svgo/plugins/removeOffCanvasPaths.js

138 lines
3.9 KiB

'use strict';
/**
* @typedef {import('../lib/types').PathDataItem} PathDataItem
*/
const { visitSkip, detachNodeFromParent } = require('../lib/xast.js');
const { parsePathData } = require('../lib/path.js');
const { intersects } = require('./_path.js');
exports.type = 'visitor';
exports.name = 'removeOffCanvasPaths';
exports.active = false;
exports.description =
'removes elements that are drawn outside of the viewbox (disabled by default)';
/**
* Remove elements that are drawn outside of the viewbox.
*
* @author JoshyPHP
*
* @type {import('../lib/types').Plugin<void>}
*/
exports.fn = () => {
/**
* @type {null | {
* top: number,
* right: number,
* bottom: number,
* left: number,
* width: number,
* height: number
* }}
*/
let viewBoxData = null;
return {
element: {
enter: (node, parentNode) => {
if (node.name === 'svg' && parentNode.type === 'root') {
let viewBox = '';
// find viewbox
if (node.attributes.viewBox != null) {
// remove commas and plus signs, normalize and trim whitespace
viewBox = node.attributes.viewBox;
} else if (
node.attributes.height != null &&
node.attributes.width != null
) {
viewBox = `0 0 ${node.attributes.width} ${node.attributes.height}`;
}
// parse viewbox
// remove commas and plus signs, normalize and trim whitespace
viewBox = viewBox
.replace(/[,+]|px/g, ' ')
.replace(/\s+/g, ' ')
.replace(/^\s*|\s*$/g, '');
// ensure that the dimensions are 4 values separated by space
const m =
/^(-?\d*\.?\d+) (-?\d*\.?\d+) (\d*\.?\d+) (\d*\.?\d+)$/.exec(
viewBox
);
if (m == null) {
return;
}
const left = Number.parseFloat(m[1]);
const top = Number.parseFloat(m[2]);
const width = Number.parseFloat(m[3]);
const height = Number.parseFloat(m[4]);
// store the viewBox boundaries
viewBoxData = {
left,
top,
right: left + width,
bottom: top + height,
width,
height,
};
}
// consider that any item with a transform attribute is visible
if (node.attributes.transform != null) {
return visitSkip;
}
if (
node.name === 'path' &&
node.attributes.d != null &&
viewBoxData != null
) {
const pathData = parsePathData(node.attributes.d);
// consider that a M command within the viewBox is visible
let visible = false;
for (const pathDataItem of pathData) {
if (pathDataItem.command === 'M') {
const [x, y] = pathDataItem.args;
if (
x >= viewBoxData.left &&
x <= viewBoxData.right &&
y >= viewBoxData.top &&
y <= viewBoxData.bottom
) {
visible = true;
}
}
}
if (visible) {
return;
}
if (pathData.length === 2) {
// close the path too short for intersects()
pathData.push({ command: 'z', args: [] });
}
const { left, top, width, height } = viewBoxData;
/**
* @type {Array<PathDataItem>}
*/
const viewBoxPathData = [
{ command: 'M', args: [left, top] },
{ command: 'h', args: [width] },
{ command: 'v', args: [height] },
{ command: 'H', args: [left] },
{ command: 'z', args: [] },
];
if (intersects(viewBoxPathData, pathData) === false) {
detachNodeFromParent(node, parentNode);
}
}
},
},
};
};