transition.js

'use strict';

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var parser = require('postcss-value-parser');
var vendor = require('postcss').vendor;
var list = require('postcss').list;

var Transition = function () {
    function Transition(prefixes) {
        _classCallCheck(this, Transition);

        Object.defineProperty(this, 'props', {
            enumerable: true,
            writable: true,
            value: ['transition', 'transition-property']
        });

        this.prefixes = prefixes;
    }

    /**
     * Process transition and add prefies for all necessary properties
     */


    Transition.prototype.add = function add(decl, result) {
        var _this = this;

        var prefix = void 0,
            prop = void 0;
        var declPrefixes = this.prefixes.add[decl.prop] && this.prefixes.add[decl.prop].prefixes || [];

        var params = this.parse(decl.value);
        var names = params.map(function (i) {
            return _this.findProp(i);
        });
        var added = [];

        if (names.some(function (i) {
            return i[0] === '-';
        })) {
            return;
        }

        for (var _iterator = params, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
            var _ref;

            if (_isArray) {
                if (_i >= _iterator.length) break;
                _ref = _iterator[_i++];
            } else {
                _i = _iterator.next();
                if (_i.done) break;
                _ref = _i.value;
            }

            var param = _ref;

            prop = this.findProp(param);
            if (prop[0] === '-') continue;

            var prefixer = this.prefixes.add[prop];
            if (!prefixer || !prefixer.prefixes) continue;

            for (var _iterator3 = prefixer.prefixes, _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : _iterator3[Symbol.iterator]();;) {
                if (_isArray3) {
                    if (_i3 >= _iterator3.length) break;
                    prefix = _iterator3[_i3++];
                } else {
                    _i3 = _iterator3.next();
                    if (_i3.done) break;
                    prefix = _i3.value;
                }

                var prefixed = this.prefixes.prefixed(prop, prefix);
                if (prefixed !== '-ms-transform' && names.indexOf(prefixed) === -1) {
                    if (!this.disabled(prop, prefix)) {
                        added.push(this.clone(prop, prefixed, param));
                    }
                }
            }
        }

        params = params.concat(added);
        var value = this.stringify(params);

        var webkitClean = this.stringify(this.cleanFromUnprefixed(params, '-webkit-'));
        if (declPrefixes.indexOf('-webkit-') !== -1) {
            this.cloneBefore(decl, '-webkit-' + decl.prop, webkitClean);
        }
        this.cloneBefore(decl, decl.prop, webkitClean);
        if (declPrefixes.indexOf('-o-') !== -1) {
            var operaClean = this.stringify(this.cleanFromUnprefixed(params, '-o-'));
            this.cloneBefore(decl, '-o-' + decl.prop, operaClean);
        }

        for (var _iterator2 = declPrefixes, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
            if (_isArray2) {
                if (_i2 >= _iterator2.length) break;
                prefix = _iterator2[_i2++];
            } else {
                _i2 = _iterator2.next();
                if (_i2.done) break;
                prefix = _i2.value;
            }

            if (prefix !== '-webkit-' && prefix !== '-o-') {
                var prefixValue = this.stringify(this.cleanOtherPrefixes(params, prefix));
                this.cloneBefore(decl, prefix + decl.prop, prefixValue);
            }
        }

        if (value !== decl.value && !this.already(decl, decl.prop, value)) {
            this.checkForWarning(result, decl);
            decl.cloneBefore();
            decl.value = value;
        }
    };

    /**
     * Find property name
     */


    Transition.prototype.findProp = function findProp(param) {
        var prop = param[0].value;
        if (/^\d/.test(prop)) {
            for (var i = 0; i < param.length; i++) {
                var token = param[i];
                if (i !== 0 && token.type === 'word') {
                    return token.value;
                }
            }
        }
        return prop;
    };

    /**
     * Does we aready have this declaration
     */


    Transition.prototype.already = function already(decl, prop, value) {
        return decl.parent.some(function (i) {
            return i.prop === prop && i.value === value;
        });
    };

    /**
     * Add declaration if it is not exist
     */


    Transition.prototype.cloneBefore = function cloneBefore(decl, prop, value) {
        if (!this.already(decl, prop, value)) {
            decl.cloneBefore({ prop: prop, value: value });
        }
    };

    /**
     * Show transition-property warning
     */


    Transition.prototype.checkForWarning = function checkForWarning(result, decl) {
        if (decl.prop !== 'transition-property') {
            return;
        }

        decl.parent.each(function (i) {
            if (i.type !== 'decl') {
                return undefined;
            }
            if (i.prop.indexOf('transition-') !== 0) {
                return undefined;
            }
            if (i.prop === 'transition-property') {
                return undefined;
            }

            if (list.comma(i.value).length > 1) {
                decl.warn(result, 'Replace transition-property to transition, ' + 'because Autoprefixer could not support ' + 'any cases of transition-property ' + 'and other transition-*');
            }
            return false;
        });
    };

    /**
     * Process transition and remove all unnecessary properties
     */


    Transition.prototype.remove = function remove(decl) {
        var _this2 = this;

        var params = this.parse(decl.value);
        params = params.filter(function (i) {
            var prop = _this2.prefixes.remove[_this2.findProp(i)];
            return !prop || !prop.remove;
        });
        var value = this.stringify(params);

        if (decl.value === value) {
            return;
        }

        if (params.length === 0) {
            decl.remove();
            return;
        }

        var double = decl.parent.some(function (i) {
            return i.prop === decl.prop && i.value === value;
        });
        var smaller = decl.parent.some(function (i) {
            return i !== decl && i.prop === decl.prop && i.value.length > value.length;
        });

        if (double || smaller) {
            decl.remove();
            return;
        }

        decl.value = value;
    };

    /**
     * Parse properties list to array
     */


    Transition.prototype.parse = function parse(value) {
        var ast = parser(value);
        var result = [];
        var param = [];
        for (var _iterator4 = ast.nodes, _isArray4 = Array.isArray(_iterator4), _i4 = 0, _iterator4 = _isArray4 ? _iterator4 : _iterator4[Symbol.iterator]();;) {
            var _ref2;

            if (_isArray4) {
                if (_i4 >= _iterator4.length) break;
                _ref2 = _iterator4[_i4++];
            } else {
                _i4 = _iterator4.next();
                if (_i4.done) break;
                _ref2 = _i4.value;
            }

            var node = _ref2;

            param.push(node);
            if (node.type === 'div' && node.value === ',') {
                result.push(param);
                param = [];
            }
        }
        result.push(param);
        return result.filter(function (i) {
            return i.length > 0;
        });
    };

    /**
     * Return properties string from array
     */


    Transition.prototype.stringify = function stringify(params) {
        if (params.length === 0) {
            return '';
        }
        var nodes = [];
        for (var _iterator5 = params, _isArray5 = Array.isArray(_iterator5), _i5 = 0, _iterator5 = _isArray5 ? _iterator5 : _iterator5[Symbol.iterator]();;) {
            var _ref3;

            if (_isArray5) {
                if (_i5 >= _iterator5.length) break;
                _ref3 = _iterator5[_i5++];
            } else {
                _i5 = _iterator5.next();
                if (_i5.done) break;
                _ref3 = _i5.value;
            }

            var param = _ref3;

            if (param[param.length - 1].type !== 'div') {
                param.push(this.div(params));
            }
            nodes = nodes.concat(param);
        }
        if (nodes[0].type === 'div') {
            nodes = nodes.slice(1);
        }
        if (nodes[nodes.length - 1].type === 'div') {
            nodes = nodes.slice(0, +-2 + 1 || undefined);
        }
        return parser.stringify({ nodes: nodes });
    };

    /**
     * Return new param array with different name
     */


    Transition.prototype.clone = function clone(origin, name, param) {
        var result = [];
        var changed = false;
        for (var _iterator6 = param, _isArray6 = Array.isArray(_iterator6), _i6 = 0, _iterator6 = _isArray6 ? _iterator6 : _iterator6[Symbol.iterator]();;) {
            var _ref4;

            if (_isArray6) {
                if (_i6 >= _iterator6.length) break;
                _ref4 = _iterator6[_i6++];
            } else {
                _i6 = _iterator6.next();
                if (_i6.done) break;
                _ref4 = _i6.value;
            }

            var i = _ref4;

            if (!changed && i.type === 'word' && i.value === origin) {
                result.push({ type: 'word', value: name });
                changed = true;
            } else {
                result.push(i);
            }
        }
        return result;
    };

    /**
     * Find or create seperator
     */


    Transition.prototype.div = function div(params) {
        for (var _iterator7 = params, _isArray7 = Array.isArray(_iterator7), _i7 = 0, _iterator7 = _isArray7 ? _iterator7 : _iterator7[Symbol.iterator]();;) {
            var _ref5;

            if (_isArray7) {
                if (_i7 >= _iterator7.length) break;
                _ref5 = _iterator7[_i7++];
            } else {
                _i7 = _iterator7.next();
                if (_i7.done) break;
                _ref5 = _i7.value;
            }

            var param = _ref5;

            for (var _iterator8 = param, _isArray8 = Array.isArray(_iterator8), _i8 = 0, _iterator8 = _isArray8 ? _iterator8 : _iterator8[Symbol.iterator]();;) {
                var _ref6;

                if (_isArray8) {
                    if (_i8 >= _iterator8.length) break;
                    _ref6 = _iterator8[_i8++];
                } else {
                    _i8 = _iterator8.next();
                    if (_i8.done) break;
                    _ref6 = _i8.value;
                }

                var node = _ref6;

                if (node.type === 'div' && node.value === ',') {
                    return node;
                }
            }
        }
        return { type: 'div', value: ',', after: ' ' };
    };

    Transition.prototype.cleanOtherPrefixes = function cleanOtherPrefixes(params, prefix) {
        var _this3 = this;

        return params.filter(function (param) {
            var current = vendor.prefix(_this3.findProp(param));
            return current === '' || current === prefix;
        });
    };

    /**
     * Remove all non-webkit prefixes and unprefixed params if we have prefixed
     */


    Transition.prototype.cleanFromUnprefixed = function cleanFromUnprefixed(params, prefix) {
        var _this4 = this;

        var remove = params.map(function (i) {
            return _this4.findProp(i);
        }).filter(function (i) {
            return i.slice(0, prefix.length) === prefix;
        }).map(function (i) {
            return _this4.prefixes.unprefixed(i);
        });

        var result = [];
        for (var _iterator9 = params, _isArray9 = Array.isArray(_iterator9), _i9 = 0, _iterator9 = _isArray9 ? _iterator9 : _iterator9[Symbol.iterator]();;) {
            var _ref7;

            if (_isArray9) {
                if (_i9 >= _iterator9.length) break;
                _ref7 = _iterator9[_i9++];
            } else {
                _i9 = _iterator9.next();
                if (_i9.done) break;
                _ref7 = _i9.value;
            }

            var param = _ref7;

            var prop = this.findProp(param);
            var p = vendor.prefix(prop);
            if (remove.indexOf(prop) === -1 && (p === prefix || p === '')) {
                result.push(param);
            }
        }
        return result;
    };

    /**
     * Check property for disabled by option
     */


    Transition.prototype.disabled = function disabled(prop, prefix) {
        var other = ['order', 'justify-content', 'align-self', 'align-content'];
        if (prop.indexOf('flex') !== -1 || other.indexOf(prop) !== -1) {
            if (this.prefixes.options.flexbox === false) {
                return true;
            }

            if (this.prefixes.options.flexbox === 'no-2009') {
                return prefix.indexOf('2009') !== -1;
            }
        }
        return undefined;
    };

    return Transition;
}();

module.exports = Transition;