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<!DOCTYPE html>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=569722
-->
<head>
<meta charset=UTF-8>
<title>Test for Bug 569722</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=569722">Mozilla Bug 569722</a>
<p id="display"></p>
<div id="content">
<svg width="400" height="200">
<text x="0" y="100" style="font: 16px sans-serif">aaa</text>
</svg>
</div>
<pre id="test">
<script class="testbody" type="application/javascript">
SimpleTest.waitForExplicitFinish();
function close(x, y, message) {
ok(Math.abs(x - y) < 1e-4, message);
}
function runTest() {
var text = document.querySelector("text");
// get the original length
var length = text.getComputedTextLength();
// get the original glyph positions
var startPositions = [],
endPositions = [],
extents = [];
for (let i = 0; i < 3; i++) {
startPositions.push(text.getStartPositionOfChar(i));
endPositions.push(text.getEndPositionOfChar(i));
extents.push(text.getExtentOfChar(i));
}
// widths should all be the same
is(extents[0].width, extents[1].width);
is(extents[0].width, extents[2].width);
var checkCharNumAtPosition = function(x, y, i) {
var p = document.querySelector("svg").createSVGPoint();
p.x = x;
p.y = y;
is(text.getCharNumAtPosition(p), i, "getCharNumAtPosition(" + i + ")");
};
var checkPositions = function(start, end, width) {
for (let i = 0; i < 3; i++) {
// check their positions
close(text.getStartPositionOfChar(i).x, start[i], "start position of glyph " + i);
close(text.getEndPositionOfChar(i).x, end[i], "end position of glyph " + i);
close(text.getExtentOfChar(i).x, start[i], "left edge of extent of glyph " + i);
close(text.getExtentOfChar(i).width, width, "width of glyph " + i);
checkCharNumAtPosition((start[i] + end[i]) / 2, 100, i);
}
};
var w = extents[0].width;
var doLengthAdjustSpacingTest = function() {
// getComputedTextLength should return the sum of the advances, and since
// we are just changing the positions of the glyphs, it should be the same
// as without a textLength="" attribute
close(text.getComputedTextLength(), length, "getComputedTextLength when lengthAdjust=\"spacing\"");
// expected start and end positions of the glyphs
var start = [0, 50 - w / 2, 100 - w];
var end = [w, 50 + w / 2, 100];
checkPositions(start, end, w);
};
// switch to adjust glyph positions, using the default value of lengthAdjust=""
text.setAttribute("textLength", "100");
doLengthAdjustSpacingTest();
// then with an explicit lengthAdjust="spacing"
text.setAttribute("lengthAdjust", "spacing");
doLengthAdjustSpacingTest();
// now test with lengthAdjust="spacingAndGlyphs"
text.setAttribute("lengthAdjust", "spacingAndGlyphs");
// now that each glyph is stretched, the total advance should be the textLength
close(text.getComputedTextLength(), 100, "getComputedTextLength when lengthAdjust=\"spacingAndGlyphs\"");
// expected start and end positions of the glyphs
var start = [0, 33.3333, 66.6666];
var end = [33.3333, 66.6666, 100];
checkPositions(start, end, 33.3333);
SimpleTest.finish();
}
window.addEventListener("load", runTest);
</script>
</pre>
</body>
</html>
|
