WIP - add extractor, generate snippet_data

node_modules/fbjs/lib/UnicodeBidiDirection.js

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+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @typechecks
+ * 
+ */
+
+/**
+ * Constants to represent text directionality
+ *
+ * Also defines a *global* direciton, to be used in bidi algorithms as a
+ * default fallback direciton, when no better direction is found or provided.
+ *
+ * NOTE: Use `setGlobalDir()`, or update `initGlobalDir()`, to set the initial
+ *       global direction value based on the application.
+ *
+ * Part of the implementation of Unicode Bidirectional Algorithm (UBA)
+ * Unicode Standard Annex #9 (UAX9)
+ * http://www.unicode.org/reports/tr9/
+ */
+'use strict';
+
+var invariant = require("./invariant");
+
+var NEUTRAL = 'NEUTRAL'; // No strong direction
+
+var LTR = 'LTR'; // Left-to-Right direction
+
+var RTL = 'RTL'; // Right-to-Left direction
+
+var globalDir = null; // == Helpers ==
+
+/**
+ * Check if a directionality value is a Strong one
+ */
+
+function isStrong(dir) {
+  return dir === LTR || dir === RTL;
+}
+/**
+ * Get string value to be used for `dir` HTML attribute or `direction` CSS
+ * property.
+ */
+
+
+function getHTMLDir(dir) {
+  !isStrong(dir) ? process.env.NODE_ENV !== "production" ? invariant(false, '`dir` must be a strong direction to be converted to HTML Direction') : invariant(false) : void 0;
+  return dir === LTR ? 'ltr' : 'rtl';
+}
+/**
+ * Get string value to be used for `dir` HTML attribute or `direction` CSS
+ * property, but returns null if `dir` has same value as `otherDir`.
+ * `null`.
+ */
+
+
+function getHTMLDirIfDifferent(dir, otherDir) {
+  !isStrong(dir) ? process.env.NODE_ENV !== "production" ? invariant(false, '`dir` must be a strong direction to be converted to HTML Direction') : invariant(false) : void 0;
+  !isStrong(otherDir) ? process.env.NODE_ENV !== "production" ? invariant(false, '`otherDir` must be a strong direction to be converted to HTML Direction') : invariant(false) : void 0;
+  return dir === otherDir ? null : getHTMLDir(dir);
+} // == Global Direction ==
+
+/**
+ * Set the global direction.
+ */
+
+
+function setGlobalDir(dir) {
+  globalDir = dir;
+}
+/**
+ * Initialize the global direction
+ */
+
+
+function initGlobalDir() {
+  setGlobalDir(LTR);
+}
+/**
+ * Get the global direction
+ */
+
+
+function getGlobalDir() {
+  if (!globalDir) {
+    this.initGlobalDir();
+  }
+
+  !globalDir ? process.env.NODE_ENV !== "production" ? invariant(false, 'Global direction not set.') : invariant(false) : void 0;
+  return globalDir;
+}
+
+var UnicodeBidiDirection = {
+  // Values
+  NEUTRAL: NEUTRAL,
+  LTR: LTR,
+  RTL: RTL,
+  // Helpers
+  isStrong: isStrong,
+  getHTMLDir: getHTMLDir,
+  getHTMLDirIfDifferent: getHTMLDirIfDifferent,
+  // Global Direction
+  setGlobalDir: setGlobalDir,
+  initGlobalDir: initGlobalDir,
+  getGlobalDir: getGlobalDir
+};
+module.exports = UnicodeBidiDirection;