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107 lines
3.3 KiB
HTML
107 lines
3.3 KiB
HTML
<!DOCTYPE html>
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<title>CSSOM View - scrollIntoView considers vertical-rl writing mode</title>
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<meta charset="utf-8">
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<link rel="author" title="Suneel Kota" href="mailto:suneel.kota@samsung.com">
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<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-element-scrollintoview">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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.box {
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float: left;
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width: 200px;
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height: 200px;
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}
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#scroller {
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writing-mode: vertical-rl;
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overflow: scroll;
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width: 300px;
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height: 300px;
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}
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#container{
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width: 600px;
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height: 600px;
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}
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#target {
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background-color: #ff0;
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}
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</style>
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<body>
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<div id="scroller">
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<div id="container">
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<!-- ROW-1 -->
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<div class="row">
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<div class="box"></div>
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<div class="box"></div>
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<div class="box"></div>
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</div>
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<!-- ROW-2 -->
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<div class="row">
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<div class="box"></div>
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<div class="box" id="target"></div>
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<div class="box"></div>
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</div>
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<!-- ROW-3 -->
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<div class="row">
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<div class="box"></div>
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<div class="box"></div>
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<div class="box"></div>
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</div>
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</div>
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</div>
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<script>
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var target = document.getElementById("target");
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var scroller = document.getElementById("scroller");
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var scrollbar_width = scroller.offsetWidth - scroller.clientWidth;
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var scroller_width = scroller.offsetWidth;
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var scroller_height = scroller.offsetHeight;
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var box_width = target.offsetWidth;
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var box_height = target.offsetHeight;
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var expectedX = [ ((2*box_width)-scroller_width)+scrollbar_width, ((3*box_width - scroller_width)/2)+ (scrollbar_width/2), box_width ];
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var expectedY = [ box_height, ((3*box_height - scroller_height)/2) + (scrollbar_width/2), ((2*box_height)-scroller_height) + scrollbar_width ];
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// As browsers differ in the meaning of scrollLeft when
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// in a right-to-left mode, we adjust the expectation
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// to match the semantics of scrollLeft.
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if(scroller.scrollLeft === 0)
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expectedX = [ -box_width, -(((3*box_width - scroller_width)/2)+ (scrollbar_width/2)), -(((2*box_width)-scroller_width)+scrollbar_width)];
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// This formats dict as a string suitable as test name.
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// format_value() is provided by testharness.js,
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// which also preserves sign for -0.
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function format_dict(dict) {
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const props = [];
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for (let prop in dict) {
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props.push(`${prop}: ${format_value(dict[prop])}`);
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}
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return `{${props.join(", ")}}`;
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}
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[
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[{block: "start", inline: "start"}, expectedX[0], expectedY[0]],
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[{block: "start", inline: "center"}, expectedX[0], expectedY[1]],
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[{block: "start", inline: "end"}, expectedX[0], expectedY[2]],
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[{block: "center", inline: "start"}, expectedX[1], expectedY[0]],
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[{block: "center", inline: "center"}, expectedX[1], expectedY[1]],
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[{block: "center", inline: "end"}, expectedX[1], expectedY[2]],
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[{block: "end", inline: "start"}, expectedX[2], expectedY[0]],
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[{block: "end", inline: "center"}, expectedX[2], expectedY[1]],
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[{block: "end", inline: "end"}, expectedX[2], expectedY[2]],
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].forEach(([input, expectedX, expectedY]) => {
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test(() => {
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scroller.scrollTo(0, 0);
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target.scrollIntoView(input);
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assert_approx_equals(scroller.scrollLeft, expectedX, 0.5, "scrollX");
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assert_approx_equals(scroller.scrollTop, expectedY, 0.5, "scrollY");
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}, `scrollIntoView(${format_dict(input)})`);
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})
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</script>
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</body>
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</html>
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