test_text_scaled.html

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https://bugzilla.mozilla.org/show_bug.cgi?id=655877

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<head>

  <title>Test for Bug 655877</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=655877">Mozilla Bug 655877</a>

<p id="display"></p>

<div id="content" style="display: none"></div>

<iframe id="svg" src="text-helper-scaled.svg"></iframe>

<pre id="test">

<script class="testbody" type="application/javascript">

SimpleTest.waitForExplicitFinish();

function runTest() {

  var doc = $("svg").contentWindow.document;

  var text1 = doc.getElementById("text1");

  var text2 = doc.getElementById("text2");

  var charWidth = text1.getSubStringLength(0, 1);

  if (navigator.userAgent.indexOf("Linux") > -1 && charWidth == 241) {

    // Workaround for a slight difference in 'charWidth' (i.e. the width of

    // the 'a' char) on Linux build machines after bug 1342951.  The issue

    // doesn't reproduce locally on Ubuntu 17.04 so is particularly tricky to

    // debug.

    charWidth = 240;

  var epsilon = 0.001;

  function isClose(a, b, str) {

    ok(Math.abs(a - b) < epsilon, str + " - " + b + " should be close to " + a);

  function isPointCloseX(pt1, x, y, str) {

    isClose(pt1.x, x, str + " x");

    is(pt1.y, y, str + " y");

  function ymost(r) {

    return r.y + r.height;

  var p = text1.getStartPositionOfChar(0);

  // Simple horizontal string

  is(text1.getNumberOfChars(), 3, "text1 length");

  ok(text1.getComputedTextLength() > 0, "text1 measured length");

  is(text1.getComputedTextLength(), text1.getSubStringLength(0, 3), "text1 substring length");

  isPointCloseX(text1.getStartPositionOfChar(0), 10, 400, "text1 char 0 start offset");

  isPointCloseX(text1.getStartPositionOfChar(1), 10 + charWidth, 400, "text1 char 1 start offset");

  isPointCloseX(text1.getStartPositionOfChar(2), 10 + 2 * charWidth, 400, "text1 char 2 start offset");

  isPointCloseX(text1.getEndPositionOfChar(0), 10 + charWidth, 400, "text1 char 0 end offset");

  isPointCloseX(text1.getEndPositionOfChar(1), 10 + 2 * charWidth, 400, "text1 char 1 end offset");

  isPointCloseX(text1.getEndPositionOfChar(2), 10 + 3 * charWidth, 400, "text1 char 2 end offset");

  is(text1.getExtentOfChar(0).x, 10, "text1 char 0 extent x");

  is(text1.getExtentOfChar(0).width, text1.getSubStringLength(0, 1), "text1 char 0 extent width");

  ok(text1.getExtentOfChar(0).y < 400, "text1 char 0 extent y");

  ok(ymost(text1.getExtentOfChar(0)) > 400, "text1 char 0 extent height");

  isClose(text1.getExtentOfChar(1).x, 10 + charWidth, "text1 char 1 extent x");

  is(text1.getExtentOfChar(1).width, text1.getSubStringLength(0, 1), "text1 char 1 extent width");

  is(text1.getExtentOfChar(1).y, text1.getExtentOfChar(0).y, "text1 char 0/1 extent y");

  is(text1.getExtentOfChar(1).height, text1.getExtentOfChar(0).height, "text1 char 0/1 extent height");

  is(text1.getExtentOfChar(2).x, 10 + 2 * charWidth, "text1 char 2 extent x");

  is(text1.getExtentOfChar(2).width, text1.getSubStringLength(0, 1), "text1 char 2 extent width");

  is(text1.getExtentOfChar(2).y, text1.getExtentOfChar(0).y, "text1 char 0/2 extent y");

  is(text1.getExtentOfChar(2).height, text1.getExtentOfChar(0).height, "text1 char 0/2 extent height");

  is(text1.getRotationOfChar(0), 0, "text1 char 0 rotation");

  is(text1.getRotationOfChar(1), 0, "text1 char 0 rotation");

  is(text1.getRotationOfChar(2), 0, "text1 char 0 rotation");

  p.x = 10 + 0.1;

  p.y = 400;

  is(text1.getCharNumAtPosition(p), 0, "text1 finding char 0 left edge");

  p.x = 10 + charWidth - 0.1;

  is(text1.getCharNumAtPosition(p), 0, "text1 finding char 0 on right");

  p.x = 10 - 0.1;

  is(text1.getCharNumAtPosition(p), -1, "text1 finding no char on left");

  p.x = 10 + 0.1;

  p.y = text1.getExtentOfChar(0).y - 0.1;

  is(text1.getCharNumAtPosition(p), -1, "text1 finding no char on top");

  p.y = text1.getExtentOfChar(0).y + 0.1;

  is(text1.getCharNumAtPosition(p), 0, "text1 finding char 0 top edge");

  p.x = 10 + 3 * charWidth - 0.1;

  is(text1.getCharNumAtPosition(p), 2, "text1 finding char 2 top edge");

  p.x = 10 + 3 * charWidth + 0.1;

  is(text1.getCharNumAtPosition(p), -1, "text1 finding no char on right");

  // Text along a thin rectangle path

  charWidth = text2.getSubStringLength(0, 1);

  is(text2.getNumberOfChars(), 26, "text2 length");

  ok(text2.getComputedTextLength() > 0, "text2 measured length");

  is(text2.getComputedTextLength(), text2.getSubStringLength(0, 26), "text2 substring length");

  // character 12 should be on the bottom side

  is(text2.getStartPositionOfChar(12).y, 860, "text2 char 12 start offset");

  isfuzzy(text2.getEndPositionOfChar(12).y, 860, 0.001, "text2 char 12 end offset");

  ok(text2.getExtentOfChar(12).y < 860, "text2 char 12 extent y");

  ok(ymost(text2.getExtentOfChar(12)) > 860, "text2 char 12 extent height");

  isfuzzy(text2.getRotationOfChar(12), 180, 0.001, "text2 char 12 rotation");

  p.x = text2.getExtentOfChar(12).x + 0.1;

  p.y = ymost(text2.getExtentOfChar(12)) - 0.1;

  is(text2.getCharNumAtPosition(p), 12, "text2 finding char 12");

  // This next test is tricky. The glyph for character 3 may overlap from the above

  // but character 12 wins because it's the last to render

  p.y = text2.getExtentOfChar(12).y + 0.1;

  is(text2.getCharNumAtPosition(p), 12, "text2 finding last rendered char");

function runTests() {

  runTest();

  var doc = $("svg").contentWindow.document;

  doc.getElementById("g").setAttribute("transform", "rotate(90 200 200)");

  runTest();

  SimpleTest.finish();

window.addEventListener("load", runTests);

</script>

</pre>

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