abs-pos-non-replaced-vrl-226.xht (3659B)
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 2 3 <html xmlns="http://www.w3.org/1999/xhtml"> 4 5 <head> 6 7 <title>CSS Writing Modes Test: absolutely positioned non-replaced element - 'direction: rtl' and 'left', 'right' and 'width' are not 'auto' (overconstrained)</title> 8 9 <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> 10 <link rel="help" href="http://www.w3.org/TR/css-writing-modes-3/#vertical-layout" title="7.1 Principles of Layout in Vertical Writing Modes" /> 11 <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height" title="10.6.4 Absolutely positioned, non-replaced elements" /> 12 <link rel="match" href="abs-pos-non-replaced-vrl-130-ref.xht" /> 13 14 <meta name="flags" content="ahem image" /> 15 <meta name="assert" content="When 'direction' is 'rtl' and 'left', 'right' and 'width' are not 'auto' and 'writing-mode' is 'vertical-rl' and if the values are over-constrained, then ignore the value for 'left' and solve for that value." /> 16 17 <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" /> 18 <style type="text/css"><![CDATA[ 19 html 20 { 21 writing-mode: vertical-rl; 22 } 23 24 div#containing-block 25 { 26 background: red url("support/bg-red-2col-2row-320x320.png"); 27 color: transparent; 28 direction: rtl; 29 font: 80px/1 Ahem; 30 height: 320px; 31 position: relative; 32 width: 320px; 33 } 34 35 div#containing-block > span 36 { 37 background-color: red; 38 color: green; 39 left: 2em; 40 position: absolute; 41 right: 2em; 42 width: 1em; 43 } 44 45 /* 46 " 47 Layout calculation rules (such as those in CSS2.1, Section 10.3) that apply to the horizontal dimension in horizontal writing modes instead apply to the vertical dimension in vertical writing modes. 48 " 49 7.1 Principles of Layout in Vertical Writing Modes 50 http://www.w3.org/TR/css-writing-modes-3/#vertical-layout 51 52 So here, *right and *left properties are input into the §10.6.4 algorithms where *right properties refer to *top properties in the layout rules and where *left properties refer to *bottom properties in the layout rules. 53 54 " 55 If none of the three are 'auto': If both 'margin-top' and 'margin-bottom' are 'auto', solve the equation under the extra constraint that the two margins get equal values. If one of 'margin-top' or 'margin-bottom' is 'auto', solve the equation for that value. If the values are over-constrained, ignore the value for 'bottom' and solve for that value. 56 " 57 58 'left' + 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' + 'right' = width of containing block 59 60 So: 61 62 160px : right 63 + 64 0px : margin-right 65 + 66 0px : border-right-width 67 + 68 0px : padding-right 69 + 70 80px : width 71 + 72 0px : padding-left 73 + 74 0px : border-left-width 75 + 76 0px : margin-left 77 + 78 160px : left 79 ===================== 80 320px : width of containing block 81 82 give us 83 84 160px : right 85 + 86 0px : margin-right 87 + 88 0px : border-right-width 89 + 90 0px : padding-right 91 + 92 80px : width 93 + 94 0px : padding-left 95 + 96 0px : border-left-width 97 + 98 0px : margin-left 99 + 100 (solve) : left 101 ===================== 102 320px : width of containing block 103 104 And so computed left value must be 80px . 105 */ 106 107 ]]></style> 108 109 </head> 110 111 <body> 112 113 <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /></p> 114 115 <div id="containing-block">1 2 34<span>X</span></div> 116 117 </body> 118 </html>