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node_modules/postcss-merge-longhand/dist/lib/decl/columns.js

@@ -1,6 +1,8 @@
 'use strict';
 
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
 
 var _postcss = require('postcss');
 
@@ -8,20 +10,43 @@ var _postcssValueParser = require('postcss-value-parser');
 
 var _stylehacks = require('stylehacks');
 
-var _genericMerge = require('../genericMerge');
+var _canMerge = require('../canMerge');
+
+var _canMerge2 = _interopRequireDefault(_canMerge);
+
+var _getDecls = require('../getDecls');
+
+var _getDecls2 = _interopRequireDefault(_getDecls);
 
 var _getValue = require('../getValue');
 
 var _getValue2 = _interopRequireDefault(_getValue);
 
+var _mergeRules = require('../mergeRules');
+
+var _mergeRules2 = _interopRequireDefault(_mergeRules);
+
 var _insertCloned = require('../insertCloned');
 
 var _insertCloned2 = _interopRequireDefault(_insertCloned);
 
+var _remove = require('../remove');
+
+var _remove2 = _interopRequireDefault(_remove);
+
+var _isCustomProp = require('../isCustomProp');
+
+var _isCustomProp2 = _interopRequireDefault(_isCustomProp);
+
+var _canExplode = require('../canExplode');
+
+var _canExplode2 = _interopRequireDefault(_canExplode);
+
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
-var properties = ['column-width', 'column-count'];
-var auto = 'auto';
+const properties = ['column-width', 'column-count'];
+const auto = 'auto';
+const inherit = 'inherit';
 
 /**
  * Normalize a columns shorthand definition. Both of the longhand
@@ -33,53 +58,95 @@ var auto = 'auto';
  */
 
 function normalize(values) {
-    if (values[0] === auto) {
+    if (values[0].toLowerCase() === auto) {
         return values[1];
     }
-    if (values[1] === auto) {
+
+    if (values[1].toLowerCase() === auto) {
         return values[0];
     }
+
+    if (values[0].toLowerCase() === inherit && values[1].toLowerCase() === inherit) {
+        return inherit;
+    }
+
     return values.join(' ');
 }
 
 function explode(rule) {
-    if (rule.nodes.some(_stylehacks.detect)) {
-        return false;
-    }
-    rule.walkDecls('columns', function (decl) {
-        var values = _postcss.list.space(decl.value);
+    rule.walkDecls(/^columns$/i, decl => {
+        if (!(0, _canExplode2.default)(decl)) {
+            return;
+        }
+
+        if ((0, _stylehacks.detect)(decl)) {
+            return;
+        }
+
+        let values = _postcss.list.space(decl.value);
+
         if (values.length === 1) {
             values.push(auto);
         }
 
-        values.forEach(function (value, i) {
-            var prop = properties[1];
+        values.forEach((value, i) => {
+            let prop = properties[1];
 
-            if (value === auto) {
+            if (value.toLowerCase() === auto) {
                 prop = properties[i];
             } else if ((0, _postcssValueParser.unit)(value).unit) {
                 prop = properties[0];
             }
 
-            (0, _insertCloned2.default)(rule, decl, {
-                prop: prop,
-                value: value
+            (0, _insertCloned2.default)(decl.parent, decl, {
+                prop,
+                value
             });
         });
+
         decl.remove();
     });
 }
 
-var merge = (0, _genericMerge.genericMergeFactory)({
-    prop: 'columns',
-    properties: properties,
-    value: function value(rules) {
-        return normalize(rules.map(_getValue2.default));
+function cleanup(rule) {
+    let decls = (0, _getDecls2.default)(rule, ['columns'].concat(properties));
+
+    while (decls.length) {
+        const lastNode = decls[decls.length - 1];
+
+        // remove properties of lower precedence
+        const lesser = decls.filter(node => !(0, _stylehacks.detect)(lastNode) && !(0, _stylehacks.detect)(node) && node !== lastNode && node.important === lastNode.important && lastNode.prop === 'columns' && node.prop !== lastNode.prop);
+
+        lesser.forEach(_remove2.default);
+        decls = decls.filter(node => !~lesser.indexOf(node));
+
+        // get duplicate properties
+        let duplicates = decls.filter(node => !(0, _stylehacks.detect)(lastNode) && !(0, _stylehacks.detect)(node) && node !== lastNode && node.important === lastNode.important && node.prop === lastNode.prop && !(!(0, _isCustomProp2.default)(node) && (0, _isCustomProp2.default)(lastNode)));
+
+        duplicates.forEach(_remove2.default);
+        decls = decls.filter(node => node !== lastNode && !~duplicates.indexOf(node));
     }
-});
+}
+
+function merge(rule) {
+    (0, _mergeRules2.default)(rule, properties, (rules, lastNode) => {
+        if ((0, _canMerge2.default)(rules) && !rules.some(_stylehacks.detect)) {
+            (0, _insertCloned2.default)(lastNode.parent, lastNode, {
+                prop: 'columns',
+                value: normalize(rules.map(_getValue2.default))
+            });
+
+            rules.forEach(_remove2.default);
+
+            return true;
+        }
+    });
+
+    cleanup(rule);
+}
 
 exports.default = {
-    explode: explode,
-    merge: merge
+    explode,
+    merge
 };
 module.exports = exports['default'];