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| 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/x
html1/DTD/xhtml1-strict.dtd"> |
| 2 |
| 3 <html xmlns="http://www.w3.org/1999/xhtml"> |
| 4 |
| 5 <head> |
| 6 |
| 7 <title>CSS Writing Modes Test: non-replaced block in normal flow with 'directi
on: rtl' in vertical-rl (overconstrained)</title> |
| 8 |
| 9 <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserB
ugsSection/css21testsuite/" /> |
| 10 <link rel="help" href="http://www.w3.org/TR/css-writing-modes-3/#logical-direc
tion-layout" title="7.4 Flow-Relative Mappings" /> |
| 11 <link rel="match" href="abs-pos-non-replaced-vrl-012-ref.xht" /> |
| 12 |
| 13 <meta name="flags" content="ahem image" /> |
| 14 <meta name="assert" content="This test checks that when an inline dimension of
a non-replaced block in normal flow is over-constrained, the inline-end margin
is dropped and recalculated so that the equation involving inline-size is balanc
ed; such equation takes under account the inline's direction (ltr or rtl). In th
is test, the inline-end margin (physical margin-top) is recalculated." /> |
| 15 |
| 16 <!-- |
| 17 " |
| 18 the margin that is dropped when a box’s inline dimension is over-constrained i
s the end margin as determined by the writing mode of the containing block. |
| 19 " |
| 20 7.4 Flow-Relative Mappings |
| 21 http://www.w3.org/TR/css-writing-modes-3/#logical-direction-layout |
| 22 |
| 23 " |
| 24 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-righ
t' + 'border-right-width' + 'margin-right' = width of containing block |
| 25 |
| 26 If all of the above have a computed value other than 'auto', the values are sa
id to be "over-constrained" and one of the used values will have to be different
from its computed value. If the 'direction' property of the containing block ha
s the value 'ltr', the specified value of 'margin-right' is ignored and the valu
e is calculated so as to make the equality true. If the value of 'direction' is
'rtl', this happens to 'margin-left' instead. |
| 27 " |
| 28 CSS 2.1, section 10.3.3 Block-level, non-replaced elements in normal flow |
| 29 http://www.w3.org/TR/CSS21/visudet.html#blockwidth |
| 30 --> |
| 31 |
| 32 <meta name="DC.date.created" content="2015-10-16T09:54:03+11:00" scheme="W3CDT
F" /> |
| 33 <meta name="DC.date.modified" content="2017-02-18T09:54:03+11:00" scheme="W3CD
TF" /> |
| 34 |
| 35 <style type="text/css"><![CDATA[ |
| 36 html |
| 37 { |
| 38 writing-mode: vertical-rl; |
| 39 } |
| 40 |
| 41 body#containing-block |
| 42 { |
| 43 background-image: url("support/bg-red-3col-2row-320x320.png"); |
| 44 background-position: -152px 8px; |
| 45 /* first value represents the horizontal position and the second represent
s the vertical position */ |
| 46 |
| 47 /* |
| 48 8px (body's margin-left) |
| 49 - |
| 50 80px (4th column width) |
| 51 - |
| 52 80px (3rd column width) |
| 53 ======== |
| 54 -152px |
| 55 */ |
| 56 background-repeat: no-repeat; |
| 57 direction: rtl; |
| 58 height: 320px; |
| 59 margin: 8px; |
| 60 } |
| 61 |
| 62 p |
| 63 { |
| 64 direction: ltr; |
| 65 margin-left: 16px; |
| 66 margin-right: 16px; |
| 67 } |
| 68 |
| 69 div |
| 70 { |
| 71 background-color: green; |
| 72 margin-top: 160px; |
| 73 border-top: green solid 20px; |
| 74 padding-top: 20px; |
| 75 height: 0px; |
| 76 padding-bottom: 20px; |
| 77 border-bottom: green solid 20px; |
| 78 margin-bottom: 160px; |
| 79 |
| 80 margin-right: 96px; /* 80px + 16px necessary so that we can reuse an alrea
dy created and available reference file */ |
| 81 width: 80px; |
| 82 } |
| 83 |
| 84 /* |
| 85 " |
| 86 Layout calculation rules (such as those in CSS2.1, Section 10.3) that apply to t
he horizontal dimension in horizontal writing modes instead apply to the vertica
l dimension in vertical writing modes. |
| 87 " |
| 88 7.1 Principles of Layout in Vertical Writing Modes |
| 89 http://www.w3.org/TR/css-writing-modes-3/#vertical-layout |
| 90 |
| 91 So here, *-top and *-bottom properties are input into the §10.3.3 algorithms whe
re *-top properties refer to *-left properties in the layout rules and where *-b
ottom properties refer to *-right properties in the layout rules. |
| 92 |
| 93 'margin-top' + 'border-top-width' + 'padding-top' + 'height' + 'padding-bottom'
+ 'border-bottom-width' + 'margin-bottom' = height of containing block |
| 94 |
| 95 So: |
| 96 |
| 97 160px : margin-top |
| 98 + |
| 99 20px : border-top-width |
| 100 + |
| 101 20px : padding-top |
| 102 + |
| 103 0px : height |
| 104 + |
| 105 20px : padding-bottom |
| 106 + |
| 107 20px : border-bottom-width |
| 108 + |
| 109 160px : margin-bottom |
| 110 ======================== |
| 111 400px : while the height of containing block of div is 320px |
| 112 |
| 113 So, here, the specified value of 'margin-top' is ignored and the value is calcul
ated so as to make the equality true |
| 114 |
| 115 (solve) : margin-top |
| 116 + |
| 117 20px : border-top-width |
| 118 + |
| 119 20px : padding-top |
| 120 + |
| 121 0px : height |
| 122 + |
| 123 20px : padding-bottom |
| 124 + |
| 125 20px : border-bottom-width |
| 126 + |
| 127 160px : margin-bottom |
| 128 ======================== |
| 129 320px : height of containing block |
| 130 |
| 131 And so computed margin-top value must be 80px . |
| 132 */ |
| 133 |
| 134 ]]></style> |
| 135 |
| 136 </head> |
| 137 |
| 138 <body id="containing-block"> |
| 139 |
| 140 <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="3
6" alt="Image download support must be enabled" /></p> |
| 141 <!-- |
| 142 The image says: |
| 143 Test passes if there is a filled |
| 144 green square and <strong>no red</strong>. |
| 145 --> |
| 146 |
| 147 <div></div> |
| 148 |
| 149 </body> |
| 150 </html> |
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Chromium Code Reviews
Issue 2707203005:
Import csswg-test@ed79f8614481e97d61f17f41b65448c211d27c6f (Closed)
