0.2.0 - Mid migration

web/node_modules/postcss-normalize-positions/dist/index.js

@@ -0,0 +1,149 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+var _postcss = require('postcss');
+
+var _postcssValueParser = require('postcss-value-parser');
+
+var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
+
+var _cssnanoUtilGetArguments = require('cssnano-util-get-arguments');
+
+var _cssnanoUtilGetArguments2 = _interopRequireDefault(_cssnanoUtilGetArguments);
+
+var _has = require('has');
+
+var _has2 = _interopRequireDefault(_has);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+const directions = ['top', 'right', 'bottom', 'left', 'center'];
+
+const center = '50%';
+
+const horizontal = {
+    right: '100%',
+    left: '0'
+};
+
+const vertical = {
+    bottom: '100%',
+    top: '0'
+};
+
+function transform(value) {
+    const parsed = (0, _postcssValueParser2.default)(value);
+    const args = (0, _cssnanoUtilGetArguments2.default)(parsed);
+    const relevant = [];
+
+    args.forEach(arg => {
+        relevant.push({
+            start: null,
+            end: null
+        });
+
+        arg.forEach((part, index) => {
+            const isPosition = ~directions.indexOf(part.value.toLowerCase()) || (0, _postcssValueParser.unit)(part.value);
+            const len = relevant.length - 1;
+
+            if (relevant[len].start === null && isPosition) {
+                relevant[len].start = index;
+                relevant[len].end = index;
+
+                return;
+            }
+
+            if (relevant[len].start !== null) {
+                if (part.type === 'space') {
+                    return;
+                } else if (isPosition) {
+                    relevant[len].end = index;
+
+                    return;
+                }
+
+                return;
+            }
+        });
+    });
+
+    relevant.forEach((range, index) => {
+        if (range.start === null) {
+            return;
+        }
+
+        const position = args[index].slice(range.start, range.end + 1);
+
+        if (position.length > 3) {
+            return;
+        }
+
+        const firstValue = position[0].value.toLowerCase();
+        const secondValue = position[2] && position[2].value ? position[2].value.toLowerCase() : null;
+
+        if (position.length === 1 || secondValue === 'center') {
+            if (secondValue) {
+                position[2].value = position[1].value = '';
+            }
+
+            const map = Object.assign({}, horizontal, {
+                center
+            });
+
+            if ((0, _has2.default)(map, firstValue)) {
+                position[0].value = map[firstValue];
+            }
+
+            return;
+        }
+
+        if (firstValue === 'center' && ~directions.indexOf(secondValue)) {
+            position[0].value = position[1].value = '';
+
+            if ((0, _has2.default)(horizontal, secondValue)) {
+                position[2].value = horizontal[secondValue];
+            }
+
+            return;
+        }
+
+        if ((0, _has2.default)(horizontal, firstValue) && (0, _has2.default)(vertical, secondValue)) {
+            position[0].value = horizontal[firstValue];
+            position[2].value = vertical[secondValue];
+
+            return;
+        } else if ((0, _has2.default)(vertical, firstValue) && (0, _has2.default)(horizontal, secondValue)) {
+            position[0].value = horizontal[secondValue];
+            position[2].value = vertical[firstValue];
+
+            return;
+        }
+    });
+
+    return parsed.toString();
+}
+
+exports.default = (0, _postcss.plugin)('postcss-normalize-positions', () => {
+    return css => {
+        const cache = {};
+
+        css.walkDecls(/^(background(-position)?|(-webkit-)?perspective-origin)$/i, decl => {
+            const value = decl.value;
+
+            if (cache[value]) {
+                decl.value = cache[value];
+
+                return;
+            }
+
+            const result = transform(value);
+
+            decl.value = result;
+            cache[value] = result;
+        });
+    };
+});
+module.exports = exports['default'];