abs-pos-non-replaced-vlr-007.xht (3904B)
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: ltr' and 'top', 'height' and 'bottom' are '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-width" title="10.3.7 Absolutely positioned, non-replaced elements" /> 12 <link rel="match" href="abs-pos-non-replaced-vlr-007-ref.xht" /> 13 14 <meta name="flags" content="ahem image" /> 15 <meta name="assert" content="When 'direction' is 'ltr' and 'top', 'height' and 'bottom' are 'auto', then set 'top' to the static position, then the height is based on the content and then solve for 'bottom'." /> 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-3row-320x320.png"); 27 color: transparent; 28 direction: ltr; 29 font: 80px/1 Ahem; 30 height: 320px; 31 position: relative; 32 width: 320px; 33 34 } 35 36 div#containing-block > span 37 { 38 background-color: red; 39 bottom: auto; 40 color: green; 41 height: auto; 42 position: absolute; 43 top: auto; 44 } 45 46 /* 47 " 48 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. 49 " 50 7.1 Principles of Layout in Vertical Writing Modes 51 http://www.w3.org/TR/css-writing-modes-3/#vertical-layout 52 53 So here, *-top and *-bottom properties are input into the §10.3.7 algorithms where *-top properties refer to *-left properties in the layout rules and where *-bottom properties refer to *-right properties in the layout rules. 54 55 " 56 If all three of 'left', 'width', and 'right' are 'auto': First set any 'auto' values for 'margin-left' and 'margin-right' to 0. Then, if the 'direction' property of the element establishing the static-position containing block is 'ltr' set 'left' to the static position and apply rule number three below; otherwise, set 'right' to the static position and apply rule number one below. 57 58 3. 'width' and 'right' are 'auto' and 'left' is not 'auto', then the width is shrink-to-fit . Then solve for 'right' 59 " 60 61 'top' + 'margin-top' + 'border-top-width' + 'padding-top' + 'height' + 'padding-bottom' + 'border-bottom-width' + 'margin-bottom' + 'bottom' = height of containing block 62 63 So: 64 65 160px : top: auto: set to static position 66 + 67 0px : margin-top 68 + 69 0px : border-top-width 70 + 71 0px : padding-top 72 + 73 (based on the content) : height: auto 74 + 75 0px : padding-bottom 76 + 77 0px : border-bottom-width 78 + 79 0px : margin-bottom 80 + 81 (solve) : bottom: auto 82 ===================== 83 320px : height of containing block 84 85 gives us: 86 87 160px : top: auto: set to static position 88 + 89 0px : margin-top 90 + 91 0px : border-top-width 92 + 93 0px : padding-top 94 + 95 80px : (based on the content) : height: auto 96 + 97 0px : padding-bottom 98 + 99 0px : border-bottom-width 100 + 101 0px : margin-bottom 102 + 103 (solve) : bottom: auto 104 ===================== 105 320px : height of containing block 106 107 And so computed bottom value must be 80px . 108 */ 109 110 ]]></style> 111 112 </head> 113 114 <body> 115 116 <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /></p> 117 118 <div id="containing-block">1 2 34<span>X</span></div> 119 120 </body> 121 </html>