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