summaryrefslogtreecommitdiffstats
path: root/testing/web-platform/tests/css/css-multicol/multicol-nested-margin-004.xht
blob: bd8dc51acd56d39b027e0d00d02cc31808edbd7d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
<!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>