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-var postcss = require('postcss');
-var parser = require('postcss-value-parser');
-
-var easings = {
- easeInSine: 'cubic-bezier(0.47, 0, 0.745, 0.715)',
- easeOutSine: 'cubic-bezier(0.39, 0.575, 0.565, 1)',
- easeInOutSine: 'cubic-bezier(0.445, 0.05, 0.55, 0.95)',
- easeInQuad: 'cubic-bezier(0.55, 0.085, 0.68, 0.53)',
- easeOutQuad: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
- easeInOutQuad: 'cubic-bezier(0.455, 0.03, 0.515, 0.955)',
- easeInCubic: 'cubic-bezier(0.55, 0.055, 0.675, 0.19)',
- easeOutCubic: 'cubic-bezier(0.215, 0.61, 0.355, 1)',
- easeInOutCubic: 'cubic-bezier(0.645, 0.045, 0.355, 1)',
- easeInQuart: 'cubic-bezier(0.895, 0.03, 0.685, 0.22)',
- easeOutQuart: 'cubic-bezier(0.165, 0.84, 0.44, 1)',
- easeInOutQuart: 'cubic-bezier(0.77, 0, 0.175, 1)',
- easeInQuint: 'cubic-bezier(0.755, 0.05, 0.855, 0.06)',
- easeOutQuint: 'cubic-bezier(0.23, 1, 0.32, 1)',
- easeInOutQuint: 'cubic-bezier(0.86, 0, 0.07, 1)',
- easeInExpo: 'cubic-bezier(0.95, 0.05, 0.795, 0.035)',
- easeOutExpo: 'cubic-bezier(0.19, 1, 0.22, 1)',
- easeInOutExpo: 'cubic-bezier(1, 0, 0, 1)',
- easeInCirc: 'cubic-bezier(0.6, 0.04, 0.98, 0.335)',
- easeOutCirc: 'cubic-bezier(0.075, 0.82, 0.165, 1)',
- easeInOutCirc: 'cubic-bezier(0.785, 0.135, 0.15, 0.86)',
- easeInBack: 'cubic-bezier(0.6, -0.28, 0.735, 0.045)',
- easeOutBack: 'cubic-bezier(0.175, 0.885, 0.32, 1.275)',
- easeInOutBack: 'cubic-bezier(0.68, -0.55, 0.265, 1.55)'
-};
-
-var toSnake = function (str) {
- return str.replace(/[A-Z]/g, function (letter) {
- return '-' + letter.toLowerCase();
- });
-};
-
-var toCamel = function (str) {
- return str.replace(/-[a-z]/g, function (letter) {
- return letter[1].toUpperCase();
- });
-};
-
-var camels = Object.keys(easings);
-for ( var i = 0; i < camels.length; i++ ) {
- var camel = camels[i];
- easings[toSnake(camel)] = easings[camel];
-}
-
-module.exports = postcss.plugin('postcss-easings', function (opts) {
- if ( typeof opts === 'undefined' ) opts = { };
-
- var locals = { };
- if ( opts.easings ) {
- for ( var name in opts.easings ) {
- if ( !/^ease([\w-]+)$/.test(name) ) {
- throw new Error('Custom easing ' + name + ' has bad name. ' +
- 'Name should start from `ease` and contain ' +
- 'only letters and dashes');
- }
- locals[name] = opts.easings[name];
- if ( name.indexOf('-') !== -1 ) {
- locals[toCamel(name)] = opts.easings[name];
- } else if ( /[A-Z]/.test(name) ) {
- locals[toSnake(name)] = opts.easings[name];
- }
- }
- }
-
- return function (css) {
- css.walkDecls(function (decl) {
- if (decl.value.indexOf('ease') === -1) return;
- var root = parser(decl.value);
- root.nodes = root.nodes.map(function (node) {
- const value = node.value;
- if (node.type === 'word' && /^ease([\w-]+)$/.test(value)) {
- node.value = locals[value] || easings[value] || node.value;
- }
- return node;
- });
- decl.value = root.toString();
- });
- };
-});
-
-module.exports.easings = easings;