| <!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 multi-columns and constrained dimensions</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/" /> <!-- 2013-08-10 --> |
| <link rel="help" href="http://www.w3.org/TR/css3-multicol/#pseudo-algorithm" title="3.4 Pseudo-algorithm" /> |
| <link rel="match" href="multicol-nested-005-ref.xht" /> |
| <!-- |
| The original filename of this test was |
| multicol-inherit-005.xht |
| This test also serves as a conversion of |
| multicol-nested-001.xht |
| --> |
| <meta name="flags" content="ahem" /> |
| <meta name="assert" content="This test checks how the height of column boxes conditions the height of nested column boxes." /> |
| <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" /> |
| <style type="text/css"><![CDATA[ |
| body > div |
| { |
| column-gap: 1em; |
| font: 1.25em/1 Ahem; |
| width: 41em; |
| } |
| |
| /* |
| |
| 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 8 duos; therefore, the first 2 inner |
| column boxes should use 3 line boxes and the 3rd inner |
| column box should be using 2 line boxes. |
| |
| So, the height of the 2 blue column rules should be 60px. |
| |
| */ |
| |
| div |
| { |
| background-color: yellow; |
| color: black; |
| font-size: 1em; |
| margin: 1em; |
| orphans: 1; |
| widows: 1; |
| |
| column-count: 3; |
| } |
| |
| div > div:first-child {margin-top: 0;} |
| ]]></style> |
| </head> |
| |
| <body> |
| |
| <div> |
| <div> |
| aa aa |
| aa aa |
| aa aa |
| aa aa |
| </div> |
| <div> |
| mm mm |
| mm mm |
| mm mm |
| mm mm |
| </div> |
| <div> |
| xx xx |
| xx xx |
| xx xx |
| xx xx |
| </div> |
| </div> |
| |
| </body> |
| </html> |
