getcharnumatposition.html

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This WPT test may be referenced by the following Test IDs:
- /svg/text/scripted/getcharnumatposition.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>SVGTextContentElement.getCharNumAtPosition</title>

<link rel="help" href="https://svgwg.org/svg2-draft/text.html#__svg__SVGTextContentElement__getCharNumAtPosition">

<link rel="stylesheet" href="/fonts/ahem.css">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<svg width="800" height="600">

<style>

text {

  font: 20px/1 Ahem;

</style>

<text><tspan id="htb" x="40" y="100">abc</tspan></text>

<text style="writing-mode:vertical-lr"><tspan id="vlr" x="40" y="120">abc</tspan></text>

<text style="writing-mode:vertical-rl"><tspan id="vrl" x="80" y="120">abc</tspan></text>

<text style="writing-mode:sideways-rl"><tspan id="srl" x="80" y="200">abc</tspan></text>

</svg>

<script>

function newPoint(x, y) {

  const p = document.querySelector('svg').createSVGPoint();

  p.x = x;

  p.y = y;

  return p;

test(() => {

  const element = document.querySelector('#htb');

  assert_equals(element.getNumberOfChars(), 3);

  const start = 40;

  assert_equals(element.getCharNumAtPosition(newPoint(start - 10, 100)), -1);

  assert_equals(element.getCharNumAtPosition(newPoint(start + 10, 100)), 0);

  assert_equals(element.getCharNumAtPosition(newPoint(start + 30, 100)), 1);

  assert_equals(element.getCharNumAtPosition(newPoint(start + 50, 100)), 2);

  assert_equals(element.getCharNumAtPosition(newPoint(start + 70, 100)), -1);

}, 'horizontal-tb');

test(() => {

  const element = document.querySelector('#vlr');

  assert_equals(element.getNumberOfChars(), 3);

  const start = 120;

  assert_equals(element.getCharNumAtPosition(newPoint(40, start - 10)), -1);

  assert_equals(element.getCharNumAtPosition(newPoint(40, start + 10)), 0);

  assert_equals(element.getCharNumAtPosition(newPoint(40, start + 30)), 1);

  assert_equals(element.getCharNumAtPosition(newPoint(40, start + 50)), 2);

  assert_equals(element.getCharNumAtPosition(newPoint(40, start + 70)), -1);

}, 'virtical-lr');

test(() => {

  const element = document.querySelector('#vrl');

  assert_equals(element.getNumberOfChars(), 3);

  const start = 120;

  assert_equals(element.getCharNumAtPosition(newPoint(80, start - 10)), -1);

  assert_equals(element.getCharNumAtPosition(newPoint(80, start + 10)), 0);

  assert_equals(element.getCharNumAtPosition(newPoint(80, start + 30)), 1);

  assert_equals(element.getCharNumAtPosition(newPoint(80, start + 50)), 2);

  assert_equals(element.getCharNumAtPosition(newPoint(80, start + 70)), -1);

}, 'virtical-rl');

test(() => {

  const element = document.querySelector('#srl');

  assert_equals(element.getNumberOfChars(), 3);

  const start = 200;

  assert_equals(element.getCharNumAtPosition(newPoint(80, start - 10)), -1);

  assert_equals(element.getCharNumAtPosition(newPoint(80, start + 10)), 0);

  assert_equals(element.getCharNumAtPosition(newPoint(80, start + 30)), 1);

  assert_equals(element.getCharNumAtPosition(newPoint(80, start + 50)), 2);

  assert_equals(element.getCharNumAtPosition(newPoint(80, start + 70)), -1);

}, 'sideways-rl');

</script>