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88 lines
2.0 KiB
88 lines
2.0 KiB
2 years ago
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'use strict';
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var Matrix = require('./matrix');
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var operations = {
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matrix: true,
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scale: true,
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rotate: true,
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translate: true,
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skewX: true,
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skewY: true
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};
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var CMD_SPLIT_RE = /\s*(matrix|translate|scale|rotate|skewX|skewY)\s*\(\s*(.+?)\s*\)[\s,]*/;
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var PARAMS_SPLIT_RE = /[\s,]+/;
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module.exports = function transformParse(transformString) {
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var matrix = new Matrix();
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var cmd, params;
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// Split value into ['', 'translate', '10 50', '', 'scale', '2', '', 'rotate', '-45', '']
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transformString.split(CMD_SPLIT_RE).forEach(function (item) {
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// Skip empty elements
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if (!item.length) { return; }
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// remember operation
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if (typeof operations[item] !== 'undefined') {
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cmd = item;
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return;
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}
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// extract params & att operation to matrix
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params = item.split(PARAMS_SPLIT_RE).map(function (i) {
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return +i || 0;
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});
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// If params count is not correct - ignore command
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switch (cmd) {
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case 'matrix':
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if (params.length === 6) {
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matrix.matrix(params);
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}
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return;
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case 'scale':
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if (params.length === 1) {
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matrix.scale(params[0], params[0]);
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} else if (params.length === 2) {
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matrix.scale(params[0], params[1]);
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}
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return;
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case 'rotate':
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if (params.length === 1) {
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matrix.rotate(params[0], 0, 0);
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} else if (params.length === 3) {
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matrix.rotate(params[0], params[1], params[2]);
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}
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return;
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case 'translate':
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if (params.length === 1) {
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matrix.translate(params[0], 0);
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} else if (params.length === 2) {
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matrix.translate(params[0], params[1]);
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}
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return;
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case 'skewX':
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if (params.length === 1) {
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matrix.skewX(params[0]);
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}
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return;
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case 'skewY':
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if (params.length === 1) {
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matrix.skewY(params[0]);
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}
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return;
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}
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});
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return matrix;
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};
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