third_party/WebKit/LayoutTests/svg/custom/zoomed-baseline-shift.html

   1 <!doctype html>
   2 <title>Test that baseline-shift is unaffected by zoom level</title>
   3 <script src="../../resources/ahem.js"></script>
   4 <script src="../../resources/testharness.js"></script>
   5 <script src="../../resources/testharnessreport.js"></script>
   6 <svg width="250" height="140" viewBox="0 0 250 140"
   7      xmlns="http://www.w3.org/2000/svg" version="1.1">
   8   <style>
   9     text {
  10         font-family: ahem;
  11         font-size: 20px;
  12     }
  13   </style>
  14   <text x="15" y="40">before<tspan>inter</tspan>after</text>
  15   <script>
  16     var baselineShiftValues = ["10px", "-50%"]; // Shift half a step up or down
  17     var zoomLevels = [1, 4, 16];
  18
  19     var html = document.documentElement;
  20     baselineShiftValues.forEach(function (baselineShiftValue) {
  21         document.querySelector('tspan').setAttribute('baseline-shift', baselineShiftValue);
  22         zoomLevels.forEach(function (zoom) {
  23             html.style.zoom = zoom;
  24             var baselineShiftDelta = (document.querySelector('text').getStartPositionOfChar(0).y -
  25                 document.querySelector('tspan').getStartPositionOfChar(0).y);
  26             test(function () {
  27                 assert_equals(Math.abs(baselineShiftDelta), 10, "Baseline half a font-size up or down");
  28             }, "Text bounds height at zoom " + zoom + " with baseline-shift=" + baselineShiftValue);
  29         });
  30     });
  31     html.style.zoom = 1;
  32     // Clean up to avoid being classified as a text test; avoids an -expected.txt file.
  33     document.querySelector('text').remove();
  34   </script>
  35 </svg>