abs-pos-non-replaced-vrl-228.xht (3674B)
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 writing-mode: horizontal-tb; 40 } 41 42 /* 43 " 44 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. 45 " 46 7.1 Principles of Layout in Vertical Writing Modes 47 http://www.w3.org/TR/css-writing-modes-3/#vertical-layout 48 49 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. 50 51 " 52 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. 53 " 54 55 'left' + 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' + 'right' = width of containing block 56 57 So: 58 59 160px : right 60 + 61 0px : margin-right 62 + 63 0px : border-right-width 64 + 65 0px : padding-right 66 + 67 80px : width 68 + 69 0px : padding-left 70 + 71 0px : border-left-width 72 + 73 0px : margin-left 74 + 75 160px : left 76 ===================== 77 320px : width of containing block 78 79 give us 80 81 160px : right 82 + 83 0px : margin-right 84 + 85 0px : border-right-width 86 + 87 0px : padding-right 88 + 89 80px : width 90 + 91 0px : padding-left 92 + 93 0px : border-left-width 94 + 95 0px : margin-left 96 + 97 (solve) : left 98 ===================== 99 320px : width of containing block 100 101 And so computed left value must be 80px . 102 */ 103 104 ]]></style> 105 106 </head> 107 108 <body> 109 110 <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /></p> 111 112 <div id="containing-block">1 2 34<span>X</span></div> 113 114 </body> 115 </html>