abs-pos-non-replaced-vrl-222.xht (3639B)
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-vlr-009-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 div#containing-block 20 { 21 background: red url("support/bg-red-2col-2row-320x320.png"); 22 color: transparent; 23 direction: rtl; 24 font: 80px/1 Ahem; 25 height: 320px; 26 position: relative; 27 width: 320px; 28 writing-mode: vertical-rl; 29 } 30 31 div#containing-block > span 32 { 33 background-color: red; 34 color: green; 35 left: 2em; 36 position: absolute; 37 right: 2em; 38 width: 1em; 39 } 40 41 /* 42 " 43 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. 44 " 45 7.1 Principles of Layout in Vertical Writing Modes 46 http://www.w3.org/TR/css-writing-modes-3/#vertical-layout 47 48 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. 49 50 " 51 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. 52 " 53 54 'left' + 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' + 'right' = width of containing block 55 56 So: 57 58 160px : right 59 + 60 0px : margin-right 61 + 62 0px : border-right-width 63 + 64 0px : padding-right 65 + 66 80px : width 67 + 68 0px : padding-left 69 + 70 0px : border-left-width 71 + 72 0px : margin-left 73 + 74 160px : left 75 ===================== 76 320px : width of containing block 77 78 give us 79 80 160px : right 81 + 82 0px : margin-right 83 + 84 0px : border-right-width 85 + 86 0px : padding-right 87 + 88 80px : width 89 + 90 0px : padding-left 91 + 92 0px : border-left-width 93 + 94 0px : margin-left 95 + 96 (solve) : left 97 ===================== 98 320px : width of containing block 99 100 And so computed left value must be 80px . 101 */ 102 103 ]]></style> 104 105 </head> 106 107 <body> 108 109 <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /></p> 110 111 <div id="containing-block">1 2 34<span>X</span></div> 112 113 </body> 114 </html>