| <!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 multicolumn and nested margin-top</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-004-ref.xht" /> |
| <meta name="flags" content="ahem" /> |
| <meta name="assert" content="This test checks that due to a top margin only set on the first child element of a nested multicol element that will not collapse with the margins of the multicol element, then the height of an multi-column element can make its other inner multi-column (with a zero margin-top) element break into its own column boxes." /> |
| <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" /> |
| <style type="text/css"><![CDATA[ |
| body > div |
| { |
| font: 1.25em/1 Ahem; |
| margin: 1em; |
| width: 41em; |
| /* |
| This test requires a viewport width of 860px |
| */ |
| } |
| |
| div |
| { |
| background: yellow; |
| color: black; |
| margin: 1em; |
| orphans: 1; |
| widows: 1; |
| |
| column-count: 3; |
| column-gap: 1em; |
| } |
| |
| div div {margin: 0 1em;} |
| |
| div div:first-child {margin: 1em 1em 0;} |
| |
| /* |
| |
| N == 3; |
| |
| 43em - 2em (horizontal margins) == available-width |
| |
| 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; |
| |
| 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; |
| |
| */ |
| |
| div div:nth-child(2) {color: pink;} |
| |
| div div:nth-child(3) {color: blue;} |
| ]]></style> |
| </head> |
| |
| <body> |
| |
| <div> |
| <div> |
| bl ac |
| bl ac |
| bl ac |
| bl ac |
| </div> |
| <div> |
| Pi nk |
| Pi nk |
| Pi nk |
| Pi nk |
| </div> |
| <div> |
| bl ue |
| bl ue |
| bl ue |
| bl ue |
| </div> |
| </div> |
| |
| </body> |
| </html> |
