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<!--End Section: Calculating the Size of Grid Tracks-->
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<!--End Section: Calculating the Size of Grid Tracks-->
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<h2id="changes-from-previous-version" class="no-num">Changes from <ahref="http://www.w3.org/TR/2011/WD-css3-grid-layout-20110407">Previous Working Draft</a></h2>
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<ul>
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<ul>Changes made in 22 July 2011 Editor's Draft:
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<li>Included an algorithm for computing the size of <i>Grid tracks</i> in the spec.</li>
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<li>Removed the property grid-cell-stacking.</li>
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<li>Removed the pseudo-element selector ::grid-cell.</li>
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<li>Defined that <i>Grid cells</i> named explicitly using the <ahref="#grid-template-property">grid-template</a> property cannot be styled (with the removal of the ::grid-cell pseudo-element selector they cannot be selected).</li>
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<li>Removed the notion that <i>Grid cells</i> could be given a display property which controls their inner layout.</li>
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<li>Corrected an error in the automatic placement example. All children of the form should be display:block to ensure they are valid <i>Grid items</i>.</li>
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<li>Updated the <ahref="#grid-columns-and-rows-properties">Grid Columns and Grid Rows Properties</a> grammar to correct an error and reduce ocurrences of <string></li>
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</ul>
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<br>
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<ul>Changes made in 21 November 2011 Editor's Draft:
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<li>Section 2.4, Section 9: Removed the grid-layer property in favor of using <ahref="http://www.w3.org/TR/CSS21/visuren.html#z-index">z-index.</a></li>
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<li>Section 6.5: Clarified whitespace rules.</li>
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<li>Section 6.5: Changed "positive-number" to "positive-integer".</li>
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<li>Section 6.5: Updated the spec to clarify that percentages-sized grid tracks are undefined when inside content-sized grids.</li>
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<li>Section 8.1: Updated the spec to show that percentage-sized grid items resolve themselves against the grid cell, rather than the grid element.</li>
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<li>Section 10.1: Updated definition of RemainingSpace for shrink-to-fit situations.</li>
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<li>Section 10.2: Renamed NormalizedFractionBreadth variable to NormalizedFractionValue in the CalculateNormalizedFractionBreadth algorithm</li>
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<li>Section 10.2: Addressed typos (e.g. Space -> SpaceToFill) in CalculateNormalizedFractionBreadth</li>
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<li>Section 10.2: Updated CalculateNormalizedFractionBreadth to remove an unneeded inner loop in step 7.</li>
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<li>Section 10.2: Updated steps 2 and 3 in DistributeSpaceToTracks function to correct use of delta variable</li>
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<li>Section 10.2: Updated step 6 in ComputeUsedBreadthOfGridTracks to cover shrink-to-fit Grid Elements</li>
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</ul>
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<br>
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<ul>Changes made in 2 February 2012 Editor's Draft:
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<li>Section 2.2: Made a minor correction to the markup in Example 1.</li>
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<li>Section 7: Specified item placement behavior for undefined grid lines.</li>
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<li>Section 7.1: Specified that for the grid-column and grid-row properties, ‘<ahref="#start-column-position"><code
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class=css>start</code></a>’ is only applicable to the starting line position and ‘<ahref="#end-column-position"><code
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class=css>end</code></a>’ is only applicable to the ending line position.</li>
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<li>Section 8.1: Updated the spec to better describe the behavior of box model calculations for stretch alignment.</li>
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</ul>
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<br>
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<ul>Changes made in 6 February 2012 Editor's Draft:
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<li>Section 10: Combined Sections 10.2 and 10.3, so that the overall algorithm is described in a top-down fashion.</li>
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<li>Section 10.2: Removed the function DistributeSpaceToTracksBySpanCount, and added new functions ResolveContentBasedTrackSizingFunctions and ResolveContentBasedTrackSizingFunctionsForItems. The updates to the algorithm change the way in which Grid Items that span multiple tracks resolve their min-content and max-content contributions to those tracks such that "tighter" grids are produced.</li>
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</ul>
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+
<div>
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+
<ul>Changes made in 22 July 2011 Editor's Draft:
2157
+
<li>Included an algorithm for computing the size of <i>Grid tracks</i> in the spec.</li>
2158
+
<li>Removed the property grid-cell-stacking.</li>
2159
+
<li>Removed the pseudo-element selector ::grid-cell.</li>
2160
+
<li>Defined that <i>Grid cells</i> named explicitly using the <ahref="#grid-template-property">grid-template</a> property cannot be styled (with the removal of the ::grid-cell pseudo-element selector they cannot be selected).</li>
2161
+
<li>Removed the notion that <i>Grid cells</i> could be given a display property which controls their inner layout.</li>
2162
+
<li>Corrected an error in the automatic placement example. All children of the form should be display:block to ensure they are valid <i>Grid items</i>.</li>
2163
+
<li>Updated the <ahref="#grid-columns-and-rows-properties">Grid Columns and Grid Rows Properties</a> grammar to correct an error and reduce ocurrences of <string></li>
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</ul>
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+
<br>
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<ul>Changes made in 21 November 2011 Editor's Draft:
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+
<li>Section 2.4, Section 9: Removed the grid-layer property in favor of using <ahref="http://www.w3.org/TR/CSS21/visuren.html#z-index">z-index.</a></li>
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+
<li>Section 6.5: Clarified whitespace rules.</li>
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+
<li>Section 6.5: Changed "positive-number" to "positive-integer".</li>
2170
+
<li>Section 6.5: Updated the spec to clarify that percentages-sized grid tracks are undefined when inside content-sized grids.</li>
2171
+
<li>Section 8.1: Updated the spec to show that percentage-sized grid items resolve themselves against the grid cell, rather than the grid element.</li>
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+
<li>Section 10.1: Updated definition of RemainingSpace for shrink-to-fit situations.</li>
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+
<li>Section 10.2: Renamed NormalizedFractionBreadth variable to NormalizedFractionValue in the CalculateNormalizedFractionBreadth algorithm</li>
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+
<li>Section 10.2: Addressed typos (e.g. Space -> SpaceToFill) in CalculateNormalizedFractionBreadth</li>
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+
<li>Section 10.2: Updated CalculateNormalizedFractionBreadth to remove an unneeded inner loop in step 7.</li>
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+
<li>Section 10.2: Updated steps 2 and 3 in DistributeSpaceToTracks function to correct use of delta variable</li>
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<li>Section 10.2: Updated step 6 in ComputeUsedBreadthOfGridTracks to cover shrink-to-fit Grid Elements</li>
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</ul>
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<br>
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<ul>Changes made in 2 February 2012 Editor's Draft:
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<li>Section 2.2: Made a minor correction to the markup in Example 1.</li>
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+
<li>Section 7: Specified item placement behavior for undefined grid lines.</li>
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+
<li>Section 7.1: Specified that for the grid-column and grid-row properties, ‘<ahref="#start-column-position"><code
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class=css>start</code></a>’ is only applicable to the starting line position and ‘<ahref="#end-column-position"><code
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class=css>end</code></a>’ is only applicable to the ending line position.</li>
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<li>Section 8.1: Updated the spec to better describe the behavior of box model calculations for stretch alignment.</li>
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</ul>
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<br>
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<ul>Changes made in 6 February 2012 Editor's Draft:
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<li>Section 10: Combined Sections 10.2 and 10.3, so that the overall algorithm is described in a top-down fashion.</li>
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+
<li>Section 10.2: Removed the function DistributeSpaceToTracksBySpanCount, and added new functions ResolveContentBasedTrackSizingFunctions and ResolveContentBasedTrackSizingFunctionsForItems. The updates to the algorithm change the way in which Grid Items that span multiple tracks resolve their min-content and max-content contributions to those tracks such that "tighter" grids are produced.</li>
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