8000 [css-sizing] Remove 'preferred size' concept, fold definition into ma… · w3c/csswg-drafts@aaf82d6 · GitHub
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[css-sizing] Remove 'preferred size' concept, fold definition into max-content.
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‎css-sizing/Overview.bs‎

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without wasted space or needless overflow.
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@@ -131,20 +131,23 @@ Auto Box Sizes</h3>
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and computed by the rules in <a href="http://www.w3.org/TR/CSS21/visudet.html#blockwidth">CSS2.1§10.3.3</a>.
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: <dfn>max-content size</dfn>
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:: Roughly, the smallest <a>size</a> a box could take in a given axis
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:: A box’s “ideal” <a>size</a> in a given axis when given infinite available space.
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Usually this is the smallest <a>size</a> the box could take in that axis
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while still fitting around its contents,
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i.e. minimizing unfilled space while avoiding overflow.
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: <dfn>max-content inline size</dfn>
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:: Roughly, the narrowest <a>inline size</a> a box could take while fitting around its contents
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:: The box's “ideal” <a>size</a> in the <a>inline axis</a>.
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Usually the narrowest <a>inline size</a> it could take while fitting around its contents
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if <em>none</em> of the soft wrap opportunities within the box were taken.
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(See [[#intrinsic]].)
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Note: This is called the “preferred width” in <a href="http://www.w3.org/TR/CSS21/visudet.html#float-width">CSS2.1§10.3.5</a>
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and the “maximum cell width” in <a href="http://www.w3.org/TR/CSS21/tables.html#auto-table-layout">CSS2.1§17.5.2.2</a>.
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: <dfn>max-content block size</dfn>
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:: Roughly, the <a>block size</a> of the content after layout.
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:: The box's “ideal” <a>size</a> in the <a>inline axis</a>.
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Usually the <a>block size</a> of the content after layout.
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: <dfn>min-content size</dfn>
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:: The smallest <a>size</a> a box could take
@@ -174,17 +177,11 @@ Auto Box Sizes</h3>
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: <dfn>fit-content inline size</dfn>
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: <dfn>fit-content block size</dfn>
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:: If the <a>available size</a> in a given axis is finite,
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equal to <code>min(<a>preferred size</a>, max(<a>min-content size</a>, <a>fill-available size</a>))</code>.
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equal to <code>min(<a>max-content size</a>, max(<a>min-content size</a>, <a>fill-available size</a>))</code>.
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Otherwise, equal to the <a>max-content size</a> in that axis.
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Note: This is called the “shrink-to-fit” width in <a href="http://www.w3.org/TR/CSS21/visudet.html#float-width">CSS2.1§10.3.5</a>
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and <a href="http://www.w3.org/TR/css3-multicol/#pseudo-algorithm">CSS Multi-column Layout § 3.4</a>.
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: <dfn>preferred size</dfn>
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: <dfn>preferred inline size</dfn>
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: <dfn>preferred block size</dfn>
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:: A box’s “ideal” <a>size</a> in a given axis.
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Unless otherwise specified, this is the <a>max-content size</a>.
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</div>
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<h3 id='contributions'>
@@ -198,11 +195,6 @@ Intrinsic Size Contributions</h3>
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<dt><dfn lt="min-content contribution|min-content inline-size contribution|min-content block-size contribution">min-content contribution</dfn>
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<dd>
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The size that a box contributes to its <a>containing block</a>'s <a>min-content size</a>.
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<dt><dfn>preferred-size contribution</dfn>
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<dd>
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If the box's layout mode has a defined <a>preferred-size contribution</a>, that.
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Otherwise, the box's <a>max-content contribution</a>.
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</dl>
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<h3 id='constraints'>
@@ -218,11 +210,6 @@ Intrinsic Size Constraints</h3>
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<dd>
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A sizing constraint imposed by the box's <a>containing block</a>
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that causes it to produce its <a>min-content contribution</a>.
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<dt><dfn>preferred-size constraint</dfn>
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<dd>
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A sizing constraint imposed by the box's <a>containing block</a>
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that causes it to produce its <a>preferred-size contribution</a>.
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</dl>
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<h2 id='size-keywords'>
@@ -453,6 +440,10 @@ Intrinsic Sizes in Table Layout</h3>
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<h3 id="multicol-intrinsic">
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Intrinsic Sizes in Multi-column Layout</h3>
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<h4 id="multicol-min-content">
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Min-content Sizes in Multi-column Layout</h3>
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<p>
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The <a>min-content inline size</a> of a multi-column element
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with a computed 'column-width' not ''column-width/auto''
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multiplied by its 'column-count'
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(treating ''column-count/auto'' as ''1'').
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<h4 id="multicol-max-content">
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Max-content Sizes in Unconstrained-height Multi-column Layout</h3>
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<p>
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The <a>max-content inline size</a> of a multi-column element
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with unrestrained column heights
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and a computed 'column-count' not ''column-count/auto''
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is its 'column-count'
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multiplied by the larger of
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its 'column-width' (treating ''column-width/auto'' as zero)
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and the largest <a>max-content inline-size contribution</a> of its contents.
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and the largest <a>min-content inline-size contribution</a> of its contents.
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<p class="note">
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Note that the contents of the multi-column element
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can still grow to be wider and shorter
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if the resulting column width is still smaller
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than the largest <a>max-content inline-size contribution</a> of its contents.
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<p>
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The <a>max-content inline size</a> of a multi-column element
@@ -490,6 +490,9 @@ Intrinsic Sizes in Multi-column Layout</h3>
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-->
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<h4 id="multicol-max-content-restrained">
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Max-content Sizes in Constrained-height Multi-column Layout</h3>
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<p>
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The <a>max-content inline size</a> of a multi-column element
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with restrained-height columns (i.e. a specified 'height' or 'max-height', or whichever properties map to the <a>block size</a> of the element)
@@ -524,16 +527,6 @@ Intrinsic Sizes in Multi-column Layout</h3>
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this approximation collapses to simply doing a layout,
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and measuring the resulting columns.
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<p>
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The <a>preferred inline size</a> of a multi-column element
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with non-''column-width/auto'' 'column-width' and 'column-count'
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is the product of the 'column-width' and 'column-count',
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plus the appropriate amount of column gaps.
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In all other cases,
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it is the <a>max-content inline size</a>.
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<h2 id='extrinsic'>
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Extrinsic Size Determination</h2>
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@@ -590,7 +583,6 @@ Changes</h2>
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<ul>
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<li>Changed <code>fill-available</code> keyword to <code>fill</code>.
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<li>Defined <a>preferred size</a> concept.
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<li>Hooked up intrinsic sizes of replaced elements to the <a>default sizing algorithm</a> in [[!CSS3-IMAGES]].
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<li>Specified that <a>extrinsic sizing</a> treates ''margin/auto'' margins as zero.
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<li>Clarified definition of <a>available size</a>.

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