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diff --git a/testing/web-platform/tests/css/css-multicol/multicol-nested-margin-002.xht b/testing/web-platform/tests/css/css-multicol/multicol-nested-margin-002.xht new file mode 100644 index 0000000000..02dbb5331e --- /dev/null +++ b/testing/web-platform/tests/css/css-multicol/multicol-nested-margin-002.xht @@ -0,0 +1,114 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> + <head> + <title>CSS Multi-column Layout Test: nested multicolumns and vertical margin (complex)</title> + <link rel="author" title="Opera Software ASA" href="http://www.opera.com/" /> + <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2013-08-14 --> + <link rel="help" href="http://www.w3.org/TR/css3-multicol/#the-multi-column-model" title="2. The multi-column model" /> + <link rel="match" href="multicol-nested-margin-002-ref.xht" /> + <meta name="flags" content="ahem" /> + <meta name="assert" content="This test checks that when an inner nested multi-column element is preceded by a soft column break (caused by an unforced column-break), then the used margin-top of such inner nested multi-column element is '0'." /> + + <!-- + More info: + Re: [css3-multicol] vertical margins rendering in nested multi-columns + http://lists.w3.org/Archives/Public/www-style/2013Aug/0146.html + --> + + <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" /> + <style type="text/css"><![CDATA[ + body {margin: 0;} + + body > div + { + background-color: yellow; + font: 1.25em/1 Ahem; + width: 41em; + /* + This test requires a viewport width of 820px + */ + } + + div + { + color: yellow; + font: inherit; + orphans: 1; + widows: 1; + + column-count: 3; + column-gap: 1em; + } + + div div {margin: 0em 1em;} + + div div:last-child + { + color: blue; + margin: 1em; + } + + /* + + N == 3; + + W == max(0, (available-width - ((N - 1) * column-gap)) / N); + W == max(0, (41em - ((3 - 1) * 1em)) / 3); + W == max(0, (41em - (2 * 1em)) / 3); + W == max(0, (41em - 2em) / 3); + W == max(0, 39em / 3); + W == max(0, 13em); + W == 13em; + + The height of column rule depends on number of line boxes in + each outer column box which depends on number of line boxes + in each inner column box. So: + + 13em : width of each outer column box + - + 2em : horizontal margin of each div inside + ======= + 11em : width of each inner multi-column elements + + N == 3; + + W == max(0, (available-width - ((N - 1) * column-gap)) / N); + W == max(0, (11em - ((3 - 1) * 1em)) / 3); + W == max(0, (11em - (2 * 1em)) / 3); + W == max(0, (11em - 2em) / 3); + W == max(0, 9em / 3); + W == max(0, 3em); + W == 3em; + + So, each duo of 'a', 'm' and 'x' should fill one and only 1 + line box. There are 15 'a' duos and 15 'm' duos; therefore, + the 3 inner column boxes of each first 2 inner + multi-column elements should use 5 line boxes. + + The 1st column box of last inner multi-column + (the blue one with 'x' duos) should have 'x1', + 'x2' and 'x3' duos filling 3 line boxes. + + The 2nd column box of last inner multi-column should + have 'x4', 'x5' and 'x6' duos filling 3 line boxes. + + The 3rd column box of the last inner multi-column should + have 'x7' and 'x8' duos filling 2 line boxes. + */ + + ]]></style> + </head> + <body> + + <div> + + <div> a1 a2 a3 a4 a5 a6 a7 a8 a9 a0 a1 a2 a3 a4 a5 </div> + + <div> m1 m2 m3 m4 m5 m6 m7 m8 m9 m0 m1 m2 m3 m4 m5 </div> + + <div> x1 x2 x3 x4 x5 x6 x7 x8 </div> + + </div> + + </body> +</html> |