'use strict';
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/**
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* Optimize encoding SVG files (IE9+, Android 3+)
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* @see https://codepen.io/tigt/post/optimizing-svgs-in-data-uris
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*
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* @param {String} svgContent
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* @returns {String}
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*/
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const optimizedSvgEncode = (svgContent) => {
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const result = encodeURIComponent(svgContent)
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.replace(/%3D/g, '=')
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.replace(/%3A/g, ':')
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.replace(/%2F/g, '/')
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.replace(/%22/g, "'")
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.replace(/%2C/g, ',')
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.replace(/%3B/g, ';');
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// Lowercase the hex-escapes for better gzipping
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return result.replace(/(%[0-9A-Z]{2})/g, (matched, AZ) => {
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return AZ.toLowerCase();
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});
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};
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/**
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* Encoding file contents to string
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*
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* @param {PostcssUrl~File} file
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* @param {String} [encodeType=base64|encodeURI|encodeURIComponent]
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* @param {Boolean} [shouldOptimizeURIEncode]
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* @returns {string}
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*/
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module.exports = (file, encodeType, shouldOptimizeSvgEncode) => {
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const dataMime = `data:${file.mimeType}`;
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if (encodeType === 'base64') {
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return `${dataMime};base64,${file.contents.toString('base64')}`;
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}
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const encodeFunc = encodeType === 'encodeURI' ? encodeURI : encodeURIComponent;
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const content = file.contents.toString('utf8')
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// removing new lines
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.replace(/\n+/g, '');
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let encodedStr = (shouldOptimizeSvgEncode && encodeType === 'encodeURIComponent')
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? optimizedSvgEncode(content)
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: encodeFunc(content);
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encodedStr = encodedStr
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.replace(/%20/g, ' ')
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.replace(/#/g, '%23');
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return `${dataMime},${encodedStr}`;
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};
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