Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 311 insertions, 0 deletions

diff --git a/intl/locale/PluralForm.sys.mjs b/intl/locale/PluralForm.sys.mjs
new file mode 100644
index 0000000000..a4d0ffc4ce
--- /dev/null
+++ b/intl/locale/PluralForm.sys.mjs
@@ -0,0 +1,311 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * This module provides the PluralForm object which contains a method to figure
+ * out which plural form of a word to use for a given number based on the
+ * current localization. There is also a makeGetter method that creates a get
+ * function for the desired plural rule. This is useful for extensions that
+ * specify their own plural rule instead of relying on the browser default.
+ * (I.e., the extension hasn't been localized to the browser's locale.)
+ *
+ * See: http://developer.mozilla.org/en/docs/Localization_and_Plurals
+ *
+ * NOTE: any change to these plural forms need to be reflected in
+ * compare-locales:
+ * https://hg.mozilla.org/l10n/compare-locales/file/default/compare_locales/plurals.py
+ *
+ * List of methods:
+ *
+ * string pluralForm
+ * get(int aNum, string aWords)
+ *
+ * int numForms
+ * numForms()
+ *
+ * [string pluralForm get(int aNum, string aWords), int numForms numForms()]
+ * makeGetter(int aRuleNum)
+ * Note: Basically, makeGetter returns 2 functions that do "get" and "numForm"
+ */
+
+const kIntlProperties = "chrome://global/locale/intl.properties";
+
+// These are the available plural functions that give the appropriate index
+// based on the plural rule number specified. The first element is the number
+// of plural forms and the second is the function to figure out the index.
+/* eslint-disable no-nested-ternary */
+var gFunctions = [
+  // 0: Chinese
+  [1, n => 0],
+  // 1: English
+  [2, n => (n != 1 ? 1 : 0)],
+  // 2: French
+  [2, n => (n > 1 ? 1 : 0)],
+  // 3: Latvian
+  [3, n => (n % 10 == 1 && n % 100 != 11 ? 1 : n % 10 == 0 ? 0 : 2)],
+  // 4: Scottish Gaelic
+  [
+    4,
+    n =>
+      n == 1 || n == 11 ? 0 : n == 2 || n == 12 ? 1 : n > 0 && n < 20 ? 2 : 3,
+  ],
+  // 5: Romanian
+  [3, n => (n == 1 ? 0 : n == 0 || (n % 100 > 0 && n % 100 < 20) ? 1 : 2)],
+  // 6: Lithuanian
+  [
+    3,
+    n =>
+      n % 10 == 1 && n % 100 != 11
+        ? 0
+        : n % 10 >= 2 && (n % 100 < 10 || n % 100 >= 20)
+        ? 2
+        : 1,
+  ],
+  // 7: Russian
+  [
+    3,
+    n =>
+      n % 10 == 1 && n % 100 != 11
+        ? 0
+        : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20)
+        ? 1
+        : 2,
+  ],
+  // 8: Slovak
+  [3, n => (n == 1 ? 0 : n >= 2 && n <= 4 ? 1 : 2)],
+  // 9: Polish
+  [
+    3,
+    n =>
+      n == 1
+        ? 0
+        : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20)
+        ? 1
+        : 2,
+  ],
+  // 10: Slovenian
+  [
+    4,
+    n =>
+      n % 100 == 1
+        ? 0
+        : n % 100 == 2
+        ? 1
+        : n % 100 == 3 || n % 100 == 4
+        ? 2
+        : 3,
+  ],
+  // 11: Irish Gaeilge
+  [
+    5,
+    n =>
+      n == 1
+        ? 0
+        : n == 2
+        ? 1
+        : n >= 3 && n <= 6
+        ? 2
+        : n >= 7 && n <= 10
+        ? 3
+        : 4,
+  ],
+  // 12: Arabic
+  [
+    6,
+    n =>
+      n == 0
+        ? 5
+        : n == 1
+        ? 0
+        : n == 2
+        ? 1
+        : n % 100 >= 3 && n % 100 <= 10
+        ? 2
+        : n % 100 >= 11 && n % 100 <= 99
+        ? 3
+        : 4,
+  ],
+  // 13: Maltese
+  [
+    4,
+    n =>
+      n == 1
+        ? 0
+        : n == 0 || (n % 100 > 0 && n % 100 <= 10)
+        ? 1
+        : n % 100 > 10 && n % 100 < 20
+        ? 2
+        : 3,
+  ],
+  // 14: Unused
+  [3, n => (n % 10 == 1 ? 0 : n % 10 == 2 ? 1 : 2)],
+  // 15: Icelandic, Macedonian
+  [2, n => (n % 10 == 1 && n % 100 != 11 ? 0 : 1)],
+  // 16: Breton
+  [
+    5,
+    n =>
+      n % 10 == 1 && n % 100 != 11 && n % 100 != 71 && n % 100 != 91
+        ? 0
+        : n % 10 == 2 && n % 100 != 12 && n % 100 != 72 && n % 100 != 92
+        ? 1
+        : (n % 10 == 3 || n % 10 == 4 || n % 10 == 9) &&
+          n % 100 != 13 &&
+          n % 100 != 14 &&
+          n % 100 != 19 &&
+          n % 100 != 73 &&
+          n % 100 != 74 &&
+          n % 100 != 79 &&
+          n % 100 != 93 &&
+          n % 100 != 94 &&
+          n % 100 != 99
+        ? 2
+        : n % 1000000 == 0 && n != 0
+        ? 3
+        : 4,
+  ],
+  // 17: Shuar
+  [2, n => (n != 0 ? 1 : 0)],
+  // 18: Welsh
+  [
+    6,
+    n => (n == 0 ? 0 : n == 1 ? 1 : n == 2 ? 2 : n == 3 ? 3 : n == 6 ? 4 : 5),
+  ],
+  // 19: Slavic languages (bs, hr, sr). Same as rule 7, but resulting in different CLDR categories
+  [
+    3,
+    n =>
+      n % 10 == 1 && n % 100 != 11
+        ? 0
+        : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20)
+        ? 1
+        : 2,
+  ],
+];
+
+/* eslint-enable no-nested-ternary */
+
+export var PluralForm = {
+  /**
+   * Get the correct plural form of a word based on the number
+   *
+   * @param aNum
+   *        The number to decide which plural form to use
+   * @param aWords
+   *        A semi-colon (;) separated string of words to pick the plural form
+   * @return The appropriate plural form of the word
+   */
+  get get() {
+    // This method will lazily load to avoid perf when it is first needed and
+    // creates getPluralForm function. The function it creates is based on the
+    // value of pluralRule specified in the intl stringbundle.
+    // See: http://developer.mozilla.org/en/docs/Localization_and_Plurals
+
+    // Delete the getters to be overwritten
+    delete PluralForm.numForms;
+    delete PluralForm.get;
+
+    // Make the plural form get function and set it as the default get
+    [PluralForm.get, PluralForm.numForms] = PluralForm.makeGetter(
+      PluralForm.ruleNum
+    );
+    return PluralForm.get;
+  },
+
+  /**
+   * Create a pair of plural form functions for the given plural rule number.
+   *
+   * @param aRuleNum
+   *        The plural rule number to create functions
+   * @return A pair: [function that gets the right plural form,
+   *                  function that returns the number of plural forms]
+   */
+  makeGetter(aRuleNum) {
+    // Default to "all plural" if the value is out of bounds or invalid
+    if (aRuleNum < 0 || aRuleNum >= gFunctions.length || isNaN(aRuleNum)) {
+      log(["Invalid rule number: ", aRuleNum, " -- defaulting to 0"]);
+      aRuleNum = 0;
+    }
+
+    // Get the desired pluralRule function
+    let [numForms, pluralFunc] = gFunctions[aRuleNum];
+
+    // Return functions that give 1) the number of forms and 2) gets the right
+    // plural form
+    return [
+      function (aNum, aWords) {
+        // Figure out which index to use for the semi-colon separated words
+        let index = pluralFunc(aNum ? Number(aNum) : 0);
+        let words = aWords ? aWords.split(/;/) : [""];
+
+        // Explicitly check bounds to avoid strict warnings
+        let ret = index < words.length ? words[index] : undefined;
+
+        // Check for array out of bounds or empty strings
+        if (ret == undefined || ret == "") {
+          // Report the caller to help figure out who is causing badness
+          let caller = Components.stack.caller
+            ? Components.stack.caller.name
+            : "top";
+
+          // Display a message in the error console
+          log([
+            "Index #",
+            index,
+            " of '",
+            aWords,
+            "' for value ",
+            aNum,
+            " is invalid -- plural rule #",
+            aRuleNum,
+            "; called by ",
+            caller,
+          ]);
+
+          // Default to the first entry (which might be empty, but not undefined)
+          ret = words[0];
+        }
+
+        return ret;
+      },
+      () => numForms,
+    ];
+  },
+
+  /**
+   * Get the number of forms for the current plural rule
+   *
+   * @return The number of forms
+   */
+  get numForms() {
+    // We lazily load numForms, so trigger the init logic with get()
+    PluralForm.get();
+    return PluralForm.numForms;
+  },
+
+  /**
+   * Get the plural rule number from the intl stringbundle
+   *
+   * @return The plural rule number
+   */
+  get ruleNum() {
+    return Number(
+      Services.strings
+        .createBundle(kIntlProperties)
+        .GetStringFromName("pluralRule")
+    );
+  },
+};
+
+/**
+ * Private helper function to log errors to the error console and command line
+ *
+ * @param aMsg
+ *        Error message to log or an array of strings to concat
+ */
+function log(aMsg) {
+  let msg = "PluralForm.jsm: " + (aMsg.join ? aMsg.join("") : aMsg);
+  Services.console.logStringMessage(msg);
+  dump(msg + "\n");
+}