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fix(drag-drop): incorrectly calculating index when sorting horizontally #13082

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crisbeto
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@crisbeto crisbeto commented Sep 11, 2018

Fixes the list index not being calculated correctly, because the items are being sorted in memory based on their top position, even though the dragging is horizontal.

Fixes #13072.

Note: we already have some tests capturing this behavior, but they weren't failing, because they don't change the Y axis movement when sending fake events. When an actual user is dragging, they usually make slight movements along both axis.

Fixes the list index not being calculated correctly, because the items are being sorted in memory based on their `top` position, even though the dragging is horizontal.

Fixes angular#13072.
@crisbeto crisbeto added pr: merge safe target: major This PR is targeted for the next major release labels Sep 11, 2018
@googlebot googlebot added the cla: yes PR author has agreed to Google's Contributor License Agreement label Sep 11, 2018
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LGTM

@jelbourn jelbourn added pr: lgtm action: merge The PR is ready for merge by the caretaker labels Sep 11, 2018
@jelbourn jelbourn merged commit 664ef4c into angular:master Sep 11, 2018
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bug(@angular/cdk/drag-drop) broken sorting on preview and after drop on webkit browsers (Chrome, Opera)
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