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| <html xmlns="http://www.w3.org/1999/xhtml"> |
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| <head> |
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| <title>CSS Writing Modes Test: absolutely positioned non-replaced element - 'direction: ltr' and 'left', 'right' and 'width' are not 'auto' (overconstrained)</title> |
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| <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> |
| <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" /> |
| <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" /> |
| <link rel="match" href="abs-pos-non-replaced-vrl-002-ref.xht" /> |
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| <meta name="flags" content="ahem image" /> |
| <meta name="assert" content="When 'direction' is 'ltr' and 'left', 'right' and 'width' are not 'auto' and 'writing-mode' is 'vertical-lr' and if the values are over-constrained, then ignore the value for 'right' and solve for that value." /> |
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| <style type="text/css"><![CDATA[ |
| div#containing-block |
| { |
| background: red url("support/bg-red-3col-3row-320x320.png"); |
| color: transparent; |
| direction: ltr; |
| font: 80px/1 Ahem; |
| height: 320px; |
| position: relative; |
| width: 320px; |
| writing-mode: vertical-lr; |
| } |
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| div#containing-block > span |
| { |
| background-color: red; |
| color: green; |
| left: 2em; |
| position: absolute; |
| right: 2em; |
| width: 1em; |
| } |
| |
| /* |
| " |
| 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. |
| " |
| 7.1 Principles of Layout in Vertical Writing Modes |
| http://www.w3.org/TR/css-writing-modes-3/#vertical-layout |
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| So here, *left properties 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. |
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| " |
| 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. |
| " |
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| 'left' + 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' + 'right' = width of containing block |
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| So: |
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| 160px : right |
| + |
| 0px : margin-right |
| + |
| 0px : border-right-width |
| + |
| 0px : padding-right |
| + |
| 80px : width |
| + |
| 0px : padding-left |
| + |
| 0px : border-left-width |
| + |
| 0px : margin-left |
| + |
| 160px : left |
| ===================== |
| 320px : width of containing block |
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| give us |
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| (solve) : right |
| + |
| 0px : margin-right |
| + |
| 0px : border-right-width |
| + |
| 0px : padding-right |
| + |
| 80px : width |
| + |
| 0px : padding-left |
| + |
| 0px : border-left-width |
| + |
| 0px : margin-left |
| + |
| 160px : left |
| ===================== |
| 320px : width of containing block |
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| And so computed right value must be 80px . |
| */ |
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| ]]></style> |
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| </head> |
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| <body> |
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| <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /></p> |
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| <div id="containing-block">1 2 34<span>X</span></div> |
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| </body> |
| </html> |
