| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> |
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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: position absolute and 'vertical-lr' - 'left: auto', 'width: auto' and 'right: auto' with 'direction: ltr' in initial containing block</title> |
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| <link rel="author" title="GĂ©rard 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="match" href="../reference/ref-filled-green-100px-square.xht" /> |
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| <meta content="" name="flags" /> |
| <meta content="This test checks that when the initial containing block's writing-mode is 'horizontal-tb' and its 'direction' is 'ltr', then an absolutely positioned box (with 'left: auto', 'width: auto' and 'right: auto') whose containing block is the initial containing block must set 'left' to the static position. Whether such absolutely positioned box's 'writing-mode' is vertical or not is irrelevant." name="assert" /> |
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| <style type="text/css"><![CDATA[ |
| html |
| { |
| direction: ltr; |
| } |
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| div#green-overlapping-test |
| { |
| border-left: green solid 25px; |
| border-right: green solid 75px; |
| height: 100px; |
| left: auto; |
| position: absolute; |
| right: auto; |
| width: auto; |
| writing-mode: vertical-lr; |
| } |
| |
| /* |
| " |
| 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. |
| (...) |
| 3. 'width' and 'right' are 'auto' and 'left' is not 'auto', then the width is shrink-to-fit . Then solve for 'right' |
| " |
| 10.3.7 Absolutely positioned, non-replaced elements |
| http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width |
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| So: |
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| auto : left |
| + |
| 0px : margin-left |
| + |
| 25px : border-left-width |
| + |
| 0px : padding-left |
| + |
| auto : width |
| + |
| 0px : padding-right |
| + |
| 75px : border-right-width |
| + |
| 0px : margin-right |
| + |
| auto : right |
| ==================== |
| : width of containing block (width of Initial Containing Block) |
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| becomes |
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| 8px : left |
| + |
| 0px : margin-left |
| + |
| 25px : border-left-width |
| + |
| 0px : padding-left |
| + |
| 0px : width (shrink-to-fit) |
| + |
| 0px : padding-right |
| + |
| 75px : border-right-width |
| + |
| 0px : margin-right |
| + |
| solve : right |
| ==================== |
| : width of containing block (width of Initial Containing Block) |
| */ |
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| div#red-overlapped-reference |
| { |
| background-color: red; |
| height: 100px; |
| width: 100px; |
| } |
| ]]></style> |
| </head> |
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| <body> |
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| <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> |
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| <div id="green-overlapping-test"></div> |
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| <div id="red-overlapped-reference"></div> |
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| </body> |
| </html> |