abs-pos-non-replaced-vlr-131.xht (3549B)
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 'width' and 'right' are 'auto' and 'left' is not 'auto'</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-013-ref.xht" /> 13 14 <meta name="flags" content="ahem image" /> 15 <meta name="assert" content="When 'direction' is 'rtl' and 'width' and 'right' are 'auto' and 'left' is not 'auto' and 'writing-mode' is 'vertical-lr', then the width is based on the content and then solve for 'right'." /> 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-lr; 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: 1em; 40 position: absolute; 41 right: auto; 42 width: auto; 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, *left and *right properties are input into the §10.6.4 algorithms where *left properties refer to *top properties in the layout rules and where *right properties refer to *bottom properties in the layout rules. 53 54 " 55 1. 'top' and 'height' are 'auto' and 'bottom' is not 'auto', then the height is based on the content per 10.6.7, set 'auto' values for 'margin-top' and 'margin-bottom' to 0, and solve for 'top' 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 (solve) : right: auto 63 + 64 0px : margin-right 65 + 66 0px : border-right-width 67 + 68 0px : padding-right 69 + 70 (based on the content) : width: auto 71 + 72 0px : padding-left 73 + 74 0px : border-left-width 75 + 76 0px : margin-left 77 + 78 80px : left 79 ===================== 80 320px : width of containing block 81 82 gives us: 83 84 (solve) : right: auto 85 + 86 0px : margin-right 87 + 88 0px : border-right-width 89 + 90 0px : padding-right 91 + 92 80px : (based on the content) : width: auto 93 + 94 0px : padding-left 95 + 96 0px : border-left-width 97 + 98 0px : margin-left 99 + 100 80px : left 101 ===================== 102 320px : width of containing block 103 104 And so computed right value must be 160px . 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>