tor-browser

The Tor Browser
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2d.text.measure.selection-rects-baselines.tentative.worker.js (2552B)

      1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
      2 // OffscreenCanvas test in a worker:2d.text.measure.selection-rects-baselines.tentative
      3 // Description:Check that TextMetrics::getSelectionRects() works correctly with textBaseline.
      4 // Note:
      5 
      6 importScripts("/resources/testharness.js");
      7 importScripts("/html/canvas/resources/canvas-tests.js");
      8 
      9 var t = async_test("Check that TextMetrics::getSelectionRects() works correctly with textBaseline.");
     10 var t_pass = t.done.bind(t);
     11 var t_fail = t.step_func(function(reason) {
     12    throw reason;
     13 });
     14 t.step(function() {
     15 
     16  var canvas = new OffscreenCanvas(100, 50);
     17  var ctx = canvas.getContext('2d');
     18 
     19  ctx.font = '50px sans-serif';
     20 
     21  const kBaselines = [
     22    "top",
     23    "hanging",
     24    "middle",
     25    "alphabetic",
     26    "ideographic",
     27    "bottom",
     28  ];
     29 
     30  const kTexts = [
     31    'UNAVAILABLE',
     32    '🏁🎶🏁',
     33    '）（あ）（',
     34    '-abcd_',
     35    'איפה הספרייה?',
     36    'bidiמתמטיקה'
     37  ]
     38 
     39  for (const text of kTexts) {
     40    for (const baseline of kBaselines) {
     41      const tm = ctx.measureText(text);
     42      // First character.
     43      for (const r of tm.getSelectionRects(0, 1)) {
     44        assert_approx_equals(r.top, -tm.fontBoundingBoxAscent, 1.0);
     45        assert_approx_equals(r.bottom, tm.fontBoundingBoxDescent, 1.0);
     46      }
     47      // Last character.
     48      for (const r of tm.getSelectionRects(text.length - 1, text.length)) {
     49        assert_approx_equals(r.top, -tm.fontBoundingBoxAscent, 1.0);
     50        assert_approx_equals(r.bottom, tm.fontBoundingBoxDescent, 1.0);
     51      }
     52      // Whole string.
     53      for (const r of tm.getSelectionRects(0, text.length)) {
     54        assert_approx_equals(r.top, -tm.fontBoundingBoxAscent, 1.0);
     55        assert_approx_equals(r.bottom, tm.fontBoundingBoxDescent, 1.0);
     56      }
     57      // Intermediate string.
     58      for (const r of tm.getSelectionRects(1, text.length - 1)) {
     59        assert_approx_equals(r.top, -tm.fontBoundingBoxAscent, 1.0);
     60        assert_approx_equals(r.bottom, tm.fontBoundingBoxDescent, 1.0);
     61      }
     62      // Invalid start > end string. Creates 0 width rectangle.
     63      for (const r of tm.getSelectionRects(3, 2)) {
     64        assert_approx_equals(r.top, -tm.fontBoundingBoxAscent, 1.0);
     65        assert_approx_equals(r.bottom, tm.fontBoundingBoxDescent, 1.0);
     66      }
     67      for (const r of tm.getSelectionRects(1, 0)) {
     68        assert_approx_equals(r.top, -tm.fontBoundingBoxAscent, 1.0);
     69        assert_approx_equals(r.bottom, tm.fontBoundingBoxDescent, 1.0);
     70      }
     71    }
     72  }
     73  t.done();
     74 });
     75 done();