snapshot of https://github.com/zulip/zulip.git @ 48c69911c7dd4e03b20552eb3bd77ad8151c1357 (2026-09-15)

web/tests/rtl.test.cjs

@@ -0,0 +1,148 @@
+"use strict";
+
+const assert = require("node:assert/strict");
+
+const {zrequire} = require("./lib/namespace.cjs");
+const {run_test} = require("./lib/test.cjs");
+const {$} = require("./lib/zjquery.cjs");
+
+const rtl = zrequire("rtl");
+
+run_test("get_direction", () => {
+    // These characters are strong R or AL:    ا ب پ ج ض و د ؛
+    // These characters are not strong:        ۱ ۲ ۳ ۴ ۵ ۶ ۷ ۸ ۹ ۰
+
+    assert.equal(rtl.get_direction("abcابپ"), "ltr");
+    assert.equal(rtl.get_direction("ابپabc"), "rtl");
+    assert.equal(rtl.get_direction("123abc"), "ltr");
+    assert.equal(rtl.get_direction("۱۲۳abc"), "ltr");
+    assert.equal(rtl.get_direction("123؛بپ"), "rtl");
+    assert.equal(rtl.get_direction("۱۲۳ابپ"), "rtl");
+    assert.equal(rtl.get_direction("۱۲جg"), "rtl");
+    assert.equal(rtl.get_direction("12gج"), "ltr");
+    assert.equal(rtl.get_direction("۱۲۳"), "ltr");
+    assert.equal(rtl.get_direction("1234"), "ltr");
+
+    const supp_plane_ltr_char = "\u{103A0}";
+    const supp_plane_rtl_char = "\u{10840}";
+
+    assert.equal(rtl.get_direction(supp_plane_ltr_char), "ltr");
+    assert.equal(rtl.get_direction(supp_plane_rtl_char), "rtl");
+    assert.equal(rtl.get_direction("123" + supp_plane_ltr_char), "ltr");
+    assert.equal(rtl.get_direction("123" + supp_plane_rtl_char), "rtl");
+    assert.equal(rtl.get_direction(supp_plane_ltr_char + supp_plane_rtl_char), "ltr");
+    assert.equal(rtl.get_direction(supp_plane_rtl_char + supp_plane_ltr_char), "rtl");
+    assert.equal(rtl.get_direction(supp_plane_ltr_char + " " + supp_plane_rtl_char), "ltr");
+    assert.equal(rtl.get_direction(supp_plane_rtl_char + " " + supp_plane_ltr_char), "rtl");
+    assert.equal(rtl.get_direction(supp_plane_ltr_char + "ج" + supp_plane_rtl_char), "ltr");
+    assert.equal(rtl.get_direction(supp_plane_rtl_char + "ج" + supp_plane_ltr_char), "rtl");
+    assert.equal(rtl.get_direction("پ" + supp_plane_ltr_char + "." + supp_plane_rtl_char), "rtl");
+    assert.equal(rtl.get_direction("پ" + supp_plane_rtl_char + "." + supp_plane_ltr_char), "rtl");
+    assert.equal(rtl.get_direction("b" + supp_plane_ltr_char + "." + supp_plane_rtl_char), "ltr");
+    assert.equal(rtl.get_direction("b" + supp_plane_rtl_char + "." + supp_plane_ltr_char), "ltr");
+
+    const unmatched_surrogate_1 = "\u{D800}";
+    const unmatched_surrogate_2 = "\u{DF00}";
+
+    assert.equal(rtl.get_direction(unmatched_surrogate_1 + " "), "ltr");
+    assert.equal(rtl.get_direction(unmatched_surrogate_2 + " "), "ltr");
+    assert.equal(rtl.get_direction(" " + unmatched_surrogate_1), "ltr");
+    assert.equal(rtl.get_direction(" " + unmatched_surrogate_2), "ltr");
+    assert.equal(rtl.get_direction(" " + unmatched_surrogate_1 + " "), "ltr");
+    assert.equal(rtl.get_direction(" " + unmatched_surrogate_2 + " "), "ltr");
+    assert.equal(rtl.get_direction(unmatched_surrogate_1 + supp_plane_ltr_char), "ltr");
+    assert.equal(rtl.get_direction(unmatched_surrogate_1 + supp_plane_rtl_char), "ltr");
+    assert.equal(rtl.get_direction(unmatched_surrogate_2 + supp_plane_ltr_char), "ltr");
+    assert.equal(rtl.get_direction(unmatched_surrogate_2 + supp_plane_rtl_char), "ltr");
+    assert.equal(rtl.get_direction(supp_plane_ltr_char + unmatched_surrogate_1), "ltr");
+    assert.equal(rtl.get_direction(supp_plane_ltr_char + unmatched_surrogate_2), "ltr");
+    assert.equal(rtl.get_direction(supp_plane_rtl_char + unmatched_surrogate_1), "rtl");
+    assert.equal(rtl.get_direction(supp_plane_rtl_char + unmatched_surrogate_2), "rtl");
+
+    // Testing with some isolate initiators and PDIs.
+    const i_chars = "\u{2066}\u{2067}\u{2068}";
+    const pdi = "\u{2069}";
+
+    assert.equal(rtl.get_direction("aa" + i_chars.charAt(0) + "bb" + pdi + "cc"), "ltr");
+    assert.equal(rtl.get_direction("دد" + i_chars.charAt(0) + "bb" + pdi + "cc"), "rtl");
+    assert.equal(rtl.get_direction("12" + i_chars.charAt(0) + "bb" + pdi + "جج"), "rtl");
+    assert.equal(rtl.get_direction("۱۲" + i_chars.charAt(0) + "جج" + pdi + "cc"), "ltr");
+    assert.equal(rtl.get_direction("aa" + i_chars.charAt(0) + "ج؛ج"), "ltr");
+    assert.equal(rtl.get_direction("12" + i_chars.charAt(0) + "ج؛ج"), "ltr");
+    assert.equal(rtl.get_direction("۱۲" + i_chars.charAt(0) + "aaa"), "ltr");
+    assert.equal(
+        rtl.get_direction(
+            ",," + i_chars.charAt(0) + "bb" + i_chars.charAt(0) + "جج" + pdi + "ضض" + pdi + "..",
+        ),
+        "ltr",
+    );
+    assert.equal(
+        rtl.get_direction(
+            ",," + i_chars.charAt(0) + "bb" + i_chars.charAt(0) + "جج" + pdi + "ضض" + pdi + "وو",
+        ),
+        "rtl",
+    );
+    assert.equal(
+        rtl.get_direction(",," + i_chars.charAt(0) + "bb" + pdi + "33" + pdi + ".."),
+        "ltr",
+    );
+    assert.equal(
+        rtl.get_direction(",," + i_chars.charAt(0) + "bb" + pdi + "12" + pdi + "وو"),
+        "rtl",
+    );
+    assert.equal(
+        rtl.get_direction(",," + i_chars.charAt(0) + "ضج" + pdi + "12" + pdi + "ff"),
+        "ltr",
+    );
+
+    assert.equal(rtl.get_direction("aa" + i_chars.charAt(1) + "bb" + pdi + "cc"), "ltr");
+    assert.equal(rtl.get_direction("دد" + i_chars.charAt(2) + "bb" + pdi + "cc"), "rtl");
+    assert.equal(rtl.get_direction("12" + i_chars.charAt(1) + "bb" + pdi + "جج"), "rtl");
+    assert.equal(rtl.get_direction("۱۲" + i_chars.charAt(2) + "جج" + pdi + "cc"), "ltr");
+    assert.equal(rtl.get_direction("aa" + i_chars.charAt(1) + "ججج"), "ltr");
+    assert.equal(rtl.get_direction("12" + i_chars.charAt(2) + "ججج"), "ltr");
+    assert.equal(rtl.get_direction("۱۲" + i_chars.charAt(1) + "aaa"), "ltr");
+    assert.equal(
+        rtl.get_direction(
+            ",," + i_chars.charAt(1) + "bb" + i_chars.charAt(2) + "جج" + pdi + "ضض" + pdi + "..",
+        ),
+        "ltr",
+    );
+    assert.equal(
+        rtl.get_direction(
+            ",," + i_chars.charAt(2) + "bb" + i_chars.charAt(1) + "؛ج" + pdi + "ضض" + pdi + "وو",
+        ),
+        "rtl",
+    );
+    assert.equal(
+        rtl.get_direction(",," + i_chars.charAt(1) + "bb" + pdi + "33" + pdi + ".."),
+        "ltr",
+    );
+    assert.equal(
+        rtl.get_direction(",," + i_chars.charAt(2) + "bb" + pdi + "12" + pdi + "وو"),
+        "rtl",
+    );
+    assert.equal(
+        rtl.get_direction(",," + i_chars.charAt(1) + "ضج" + pdi + "12" + pdi + "ff"),
+        "ltr",
+    );
+});
+
+run_test("set_rtl_class_for_textarea rtl", () => {
+    const $textarea = $.create("some-textarea");
+    assert.ok(!$textarea.hasClass("rtl"));
+    const text = "```quote\nمرحبا";
+    $textarea.val(text);
+    rtl.set_rtl_class_for_textarea($textarea);
+    assert.ok($textarea.hasClass("rtl"));
+});
+
+run_test("set_rtl_class_for_textarea ltr", () => {
+    const $textarea = $.create("some-textarea");
+    $textarea.addClass("rtl");
+    assert.ok($textarea.hasClass("rtl"));
+    const text = "```quote\nEnglish text";
+    $textarea.val(text);
+    rtl.set_rtl_class_for_textarea($textarea);
+    assert.ok(!$textarea.hasClass("rtl"));
+});