1 files changed, 47 insertions, 0 deletions
diff --git a/popperjs/package/lib/utils/computeAutoPlacement.js b/popperjs/package/lib/utils/computeAutoPlacement.js
new file mode 100644
index 0000000..12e27c8
--- /dev/null
+++ b/popperjs/package/lib/utils/computeAutoPlacement.js
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+import getVariation from "./getVariation.js";
+import { variationPlacements, basePlacements, placements as allPlacements } from "../enums.js";
+import detectOverflow from "./detectOverflow.js";
+import getBasePlacement from "./getBasePlacement.js";
+export default function computeAutoPlacement(state, options) {
+  if (options === void 0) {
+    options = {};
+  }
+
+  var _options = options,
+      placement = _options.placement,
+      boundary = _options.boundary,
+      rootBoundary = _options.rootBoundary,
+      padding = _options.padding,
+      flipVariations = _options.flipVariations,
+      _options$allowedAutoP = _options.allowedAutoPlacements,
+      allowedAutoPlacements = _options$allowedAutoP === void 0 ? allPlacements : _options$allowedAutoP;
+  var variation = getVariation(placement);
+  var placements = variation ? flipVariations ? variationPlacements : variationPlacements.filter(function (placement) {
+    return getVariation(placement) === variation;
+  }) : basePlacements;
+  var allowedPlacements = placements.filter(function (placement) {
+    return allowedAutoPlacements.indexOf(placement) >= 0;
+  });
+
+  if (allowedPlacements.length === 0) {
+    allowedPlacements = placements;
+
+    if (process.env.NODE_ENV !== "production") {
+      console.error(['Popper: The `allowedAutoPlacements` option did not allow any', 'placements. Ensure the `placement` option matches the variation', 'of the allowed placements.', 'For example, "auto" cannot be used to allow "bottom-start".', 'Use "auto-start" instead.'].join(' '));
+    }
+  } // $FlowFixMe[incompatible-type]: Flow seems to have problems with two array unions...
+
+
+  var overflows = allowedPlacements.reduce(function (acc, placement) {
+    acc[placement] = detectOverflow(state, {
+      placement: placement,
+      boundary: boundary,
+      rootBoundary: rootBoundary,
+      padding: padding
+    })[getBasePlacement(placement)];
+    return acc;
+  }, {});
+  return Object.keys(overflows).sort(function (a, b) {
+    return overflows[a] - overflows[b];
+  });
+}
+\ No newline at end of file