зеркало из https://github.com/mozilla/gecko-dev.git
834 строки
21 KiB
JavaScript
834 строки
21 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 sts=2 et: */
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/*
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* This Source Code is subject to the terms of the Mozilla Public License
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* version 2.0 (the "License"). You can obtain a copy of the License at
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* http://mozilla.org/MPL/2.0/.
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*/
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/**
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* For the purposes of this test, flex items are specified as a hash with a
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* hash-entry for each CSS property that is to be set. In these per-property
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* entries, the key is the property-name, and the value can be either of the
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* following:
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* (a) the property's specified value
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* ...or...
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* (b) an array with 2 entries: [specifiedValue, expectedComputedValue] if the
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* property's computed value is intended to be checked. The first entry
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* (for the specified value) may be null; this means that no value should
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* be explicitly specified for this property.
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*
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* To allow these testcases to be re-used in both horizontal and vertical
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* flex containers, we specify "width"/"min-width"/etc. using the aliases
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* "_main-size", "_min-main-size", etc. The test code can map these
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* placeholder names to their corresponding property-names using the maps
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* defined below -- gRowPropertyMapping, gColumnPropertyMapping, etc.
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*
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* If the testcase needs to customize its flex container at all (e.g. by
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* specifying a custom container-size), it can do so by including a hash
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* called "container_properties", with propertyName:propertyValue mappings.
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* (This hash can use aliased property-names like "_main-size" as well.)
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*/
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// The standard main-size we'll use for our flex container when setting up
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// the testcases defined below:
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var gDefaultFlexContainerSize = "200px";
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// Left-to-right versions of placeholder property-names used in
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// testcases below:
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var gRowPropertyMapping =
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{
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"_main-size": "width",
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"_min-main-size": "min-width",
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"_max-main-size": "max-width",
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"_border-main-start-width": "border-left-width",
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"_border-main-end-width": "border-right-width",
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"_padding-main-start": "padding-left",
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"_padding-main-end": "padding-right",
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"_margin-main-start": "margin-left",
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"_margin-main-end": "margin-right"
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};
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// Right-to-left versions of placeholder property-names used in
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// testcases below:
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var gRowReversePropertyMapping =
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{
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"_main-size": "width",
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"_min-main-size": "min-width",
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"_max-main-size": "max-width",
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"_border-main-start-width": "border-right-width",
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"_border-main-end-width": "border-left-width",
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"_padding-main-start": "padding-right",
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"_padding-main-end": "padding-left",
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"_margin-main-start": "margin-right",
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"_margin-main-end": "margin-left"
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};
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// Top-to-bottom versions of placeholder property-names used in
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// testcases below:
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var gColumnPropertyMapping =
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{
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"_main-size": "height",
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"_min-main-size": "min-height",
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"_max-main-size": "max-height",
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"_border-main-start-width": "border-top-width",
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"_border-main-end-width": "border-bottom-width",
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"_padding-main-start": "padding-top",
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"_padding-main-end": "padding-bottom",
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"_margin-main-start": "margin-top",
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"_margin-main-end": "margin-bottom"
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};
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// Bottom-to-top versions of placeholder property-names used in
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// testcases below:
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var gColumnReversePropertyMapping =
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{
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"_main-size": "height",
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"_min-main-size": "min-height",
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"_max-main-size": "max-height",
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"_border-main-start-width": "border-bottom-width",
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"_border-main-end-width": "border-top-width",
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"_padding-main-start": "padding-bottom",
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"_padding-main-end": "padding-top",
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"_margin-main-start": "margin-bottom",
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"_margin-main-end": "margin-top"
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};
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// The list of actual testcase definitions:
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var gFlexboxTestcases =
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[
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// No flex properties specified --> should just use 'width' for sizing
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{
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items:
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[
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{ "_main-size": [ "40px", "40px" ] },
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{ "_main-size": [ "65px", "65px" ] },
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]
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},
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// flex-basis is specified:
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{
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items:
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[
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{ "flex-basis": "50px",
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"_main-size": [ null, "50px" ]
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},
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{
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"flex-basis": "20px",
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"_main-size": [ null, "20px" ]
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},
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]
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},
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// flex-basis is *large* -- sum of flex-basis values is > flex container size:
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// (w/ 0 flex-shrink so we don't shrink):
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{
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items:
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[
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{
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"flex": "0 0 150px",
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"_main-size": [ null, "150px" ]
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},
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{
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"flex": "0 0 90px",
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"_main-size": [ null, "90px" ]
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},
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]
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},
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// flex-basis is *large* -- each flex-basis value is > flex container size:
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// (w/ 0 flex-shrink so we don't shrink):
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{
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items:
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[
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{
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"flex": "0 0 250px",
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"_main-size": [ null, "250px" ]
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},
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{
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"flex": "0 0 400px",
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"_main-size": [ null, "400px" ]
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},
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]
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},
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// flex-basis has percentage value:
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{
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items:
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[
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{
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"flex-basis": "30%",
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"_main-size": [ null, "60px" ]
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},
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{
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"flex-basis": "45%",
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"_main-size": [ null, "90px" ]
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},
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]
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},
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// flex-basis has calc(percentage) value:
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{
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items:
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[
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{
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"flex-basis": "calc(20%)",
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"_main-size": [ null, "40px" ]
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},
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{
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"flex-basis": "calc(80%)",
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"_main-size": [ null, "160px" ]
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},
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]
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},
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// flex-basis has calc(percentage +/- length) value:
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{
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items:
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[
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{
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"flex-basis": "calc(10px + 20%)",
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"_main-size": [ null, "50px" ]
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},
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{
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"flex-basis": "calc(60% - 1px)",
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"_main-size": [ null, "119px" ]
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},
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]
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},
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// flex-grow is specified:
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{
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items:
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[
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{
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"flex": "1",
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"_main-size": [ null, "60px" ]
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},
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{
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"flex": "2",
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"_main-size": [ null, "120px" ]
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},
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{
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"flex": "0 20px",
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"_main-size": [ null, "20px" ]
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}
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]
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},
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// Same ratio as prev. testcase; making sure we handle float inaccuracy
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{
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items:
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[
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{
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"flex": "100000",
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"_main-size": [ null, "60px" ]
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},
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{
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"flex": "200000",
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"_main-size": [ null, "120px" ]
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},
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{
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"flex": "0.000001 20px",
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"_main-size": [ null, "20px" ]
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}
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]
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},
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// Same ratio as prev. testcase, but with items cycled and w/
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// "flex: none" & explicit size instead of "flex: 0 20px"
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{
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items:
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[
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{
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"flex": "none",
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"_main-size": [ "20px", "20px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "60px" ]
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},
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{
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"flex": "2",
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"_main-size": [ null, "120px" ]
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}
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]
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},
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// ...and now with flex-grow:[huge] to be sure we handle infinite float values
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// gracefully.
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{
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items:
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[
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{
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"flex": "9999999999999999999999999999999999999999999999999999999",
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"_main-size": [ null, "200px" ]
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},
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]
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},
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{
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items:
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[
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{
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"flex": "9999999999999999999999999999999999999999999999999999999",
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"_main-size": [ null, "50px" ]
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},
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{
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"flex": "9999999999999999999999999999999999999999999999999999999",
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"_main-size": [ null, "50px" ]
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},
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{
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"flex": "9999999999999999999999999999999999999999999999999999999",
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"_main-size": [ null, "50px" ]
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},
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{
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"flex": "9999999999999999999999999999999999999999999999999999999",
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"_main-size": [ null, "50px" ]
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},
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]
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},
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{
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items:
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[
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{
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"flex": "99999999999999999999999999999999999",
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"_main-size": [ null, "50px" ]
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},
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{
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"flex": "99999999999999999999999999999999999",
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"_main-size": [ null, "50px" ]
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},
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{
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"flex": "99999999999999999999999999999999999",
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"_main-size": [ null, "50px" ]
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},
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{
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"flex": "99999999999999999999999999999999999",
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"_main-size": [ null, "50px" ]
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},
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]
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},
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// And now, some testcases to check that we handle float accumulation error
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// gracefully.
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// First, a testcase with just a custom-sized huge container, to be sure we'll
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// be able to handle content on that scale, in the subsequent more-complex
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// testcases:
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{
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container_properties:
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{
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"_main-size": "9000000px"
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},
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items:
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[
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{
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"flex": "1",
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"_main-size": [ null, "9000000px" ]
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},
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]
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},
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// ...and now with two flex items dividing up that container's huge size:
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{
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container_properties:
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{
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"_main-size": "9000000px"
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},
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items:
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[
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{
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"flex": "2",
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"_main-size": [ null, "6000000px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "3000000px" ]
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},
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]
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},
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// OK, now to actually test accumulation error. Below, we have six flex items
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// splitting up the container's size, with huge differences between flex
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// weights. For simplicity, I've set up the weights so that they sum exactly
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// to the container's size in px. So 1 unit of flex *should* get you 1px.
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//
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// NOTE: The expected computed "_main-size" values for the flex items below
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// appear to add up to more than their container's size, which would suggest
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// that they overflow their container unnecessarily. But they don't actually
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// overflow -- this discrepancy is simply because Gecko's code for reporting
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// computed-sizes rounds to 6 significant figures (in particular, the method
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// (nsTSubstring_CharT::AppendFloat() does this). Internally, in app-units,
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// the child frames' main-sizes add up exactly to the container's main-size,
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// as you'd hope & expect.
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{
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container_properties:
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{
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"_main-size": "9000000px"
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},
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items:
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[
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{
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"flex": "3000000",
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"_main-size": [ null, "3000000px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "1px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "1px" ]
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},
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{
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"flex": "2999999",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths & when generating computed value string:
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"_main-size": [ null, "3000000px" ]
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},
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{
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"flex": "2999998",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths & when generating computed value string:
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"_main-size": [ null, "3000000px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "1px" ]
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},
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]
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},
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// Same flex items as previous testcase, but now reordered such that the items
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// with tiny flex weights are all listed last:
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{
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container_properties:
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{
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"_main-size": "9000000px"
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},
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items:
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[
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{
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"flex": "3000000",
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"_main-size": [ null, "3000000px" ]
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},
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{
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"flex": "2999999",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths & when generating computed value string:
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"_main-size": [ null, "3000000px" ]
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},
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{
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"flex": "2999998",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths & when generating computed value string:
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"_main-size": [ null, "3000000px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "1px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "1px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "1px" ]
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},
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]
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},
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// Same flex items as previous testcase, but now reordered such that the items
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// with tiny flex weights are all listed first:
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{
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container_properties:
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{
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"_main-size": "9000000px"
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},
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items:
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[
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{
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"flex": "1",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths:
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"_main-size": [ null, "0.966667px" ]
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},
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{
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"flex": "1",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths:
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"_main-size": [ null, "0.983333px" ]
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},
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{
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"flex": "1",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths:
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"_main-size": [ null, "0.983333px" ]
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},
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{
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"flex": "3000000",
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"_main-size": [ null, "3000000px" ]
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},
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{
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"flex": "2999999",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths & when generating computed value string:
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"_main-size": [ null, "3000000px" ]
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},
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{
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"flex": "2999998",
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// NOTE: Expected value is off slightly, from float error when
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// resolving flexible lengths & when generating computed value string:
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"_main-size": [ null, "3000000px" ]
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},
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]
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},
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// Trying "flex: auto" (== "1 1 auto") w/ a mix of flex-grow/flex-basis values
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{
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items:
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[
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{
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"flex": "auto",
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"_main-size": [ null, "45px" ]
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},
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{
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"flex": "2",
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"_main-size": [ null, "90px" ]
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},
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{
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"flex": "20px 1 0",
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"_main-size": [ null, "65px" ]
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}
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]
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},
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// Same as previous, but with items cycled & different syntax
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{
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items:
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[
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{
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"flex": "20px",
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"_main-size": [ null, "65px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "45px" ]
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},
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{
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"flex": "2",
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"_main-size": [ null, "90px" ]
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}
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]
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},
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{
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items:
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[
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{
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"flex": "2",
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"_main-size": [ null, "100px" ],
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"border": "0px dashed",
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"_border-main-start-width": [ "5px", "5px" ],
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"_border-main-end-width": [ "15px", "15px" ],
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"_margin-main-start": [ "22px", "22px" ],
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"_margin-main-end": [ "8px", "8px" ]
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},
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{
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"flex": "1",
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"_main-size": [ null, "50px" ],
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"_margin-main-start": [ "auto", "0px" ],
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"_padding-main-end": [ "auto", "0px" ],
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}
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]
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},
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// Test negative flexibility:
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// Basic testcase: just 1 item (relying on initial "flex-shrink: 1") --
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// should shrink to container size.
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{
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items:
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[
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{ "_main-size": [ "400px", "200px" ] },
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],
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},
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// ...and now with a "flex" specification and a different flex-shrink value:
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{
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items:
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[
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{
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"flex": "4 2 250px",
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"_main-size": [ null, "200px" ]
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},
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],
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},
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// ...and now with multiple items, which all shrink proportionally (by 50%)
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// to fit to the container, since they have the same (initial) flex-shrink val
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{
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items:
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[
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{ "_main-size": [ "80px", "40px" ] },
|
|
{ "_main-size": [ "40px", "20px" ] },
|
|
{ "_main-size": [ "30px", "15px" ] },
|
|
{ "_main-size": [ "250px", "125px" ] },
|
|
]
|
|
},
|
|
// ...and now with positive flexibility specified. (should have no effect, so
|
|
// everything still shrinks by the same proportion, since the flex-shrink
|
|
// values are all the same).
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "4 3 100px",
|
|
"_main-size": [ null, "80px" ]
|
|
},
|
|
{
|
|
"flex": "5 3 50px",
|
|
"_main-size": [ null, "40px" ]
|
|
},
|
|
{
|
|
"flex": "0 3 100px",
|
|
"_main-size": [ null, "80px" ]
|
|
}
|
|
]
|
|
},
|
|
// ...and now with *different* flex-shrink values:
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "4 2 50px",
|
|
"_main-size": [ null, "30px" ]
|
|
},
|
|
{
|
|
"flex": "5 3 50px",
|
|
"_main-size": [ null, "20px" ]
|
|
},
|
|
{
|
|
"flex": "0 0 150px",
|
|
"_main-size": [ null, "150px" ]
|
|
}
|
|
]
|
|
},
|
|
// Same ratio as prev. testcase; making sure we handle float inaccuracy
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "4 20000000 50px",
|
|
"_main-size": [ null, "30px" ]
|
|
},
|
|
{
|
|
"flex": "5 30000000 50px",
|
|
"_main-size": [ null, "20px" ]
|
|
},
|
|
{
|
|
"flex": "0 0.0000001 150px",
|
|
"_main-size": [ null, "150px" ]
|
|
}
|
|
]
|
|
},
|
|
// Another "different flex-shrink values" testcase:
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "4 2 115px",
|
|
"_main-size": [ null, "69px" ]
|
|
},
|
|
{
|
|
"flex": "5 1 150px",
|
|
"_main-size": [ null, "120px" ]
|
|
},
|
|
{
|
|
"flex": "1 4 30px",
|
|
"_main-size": [ null, "6px" ]
|
|
},
|
|
{
|
|
"flex": "1 0 5px",
|
|
"_main-size": [ null, "5px" ]
|
|
},
|
|
]
|
|
},
|
|
|
|
// ...and now with min-size (clamping the effects of flex-shrink on one item):
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "4 5 75px",
|
|
"_min-main-size": "50px",
|
|
"_main-size": [ null, "50px" ],
|
|
},
|
|
{
|
|
"flex": "5 5 100px",
|
|
"_main-size": [ null, "62.5px" ]
|
|
},
|
|
{
|
|
"flex": "0 4 125px",
|
|
"_main-size": [ null, "87.5px" ]
|
|
}
|
|
]
|
|
},
|
|
|
|
// Test a min-size that's much larger than initial preferred size, but small
|
|
// enough that our flexed size pushes us over it:
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "auto",
|
|
"_min-main-size": "110px",
|
|
"_main-size": [ "50px", "125px" ]
|
|
},
|
|
{
|
|
"flex": "auto",
|
|
"_main-size": [ null, "75px" ]
|
|
}
|
|
]
|
|
},
|
|
|
|
// Test a min-size that's much larger than initial preferred size, and is
|
|
// even larger than our positively-flexed size, so that we have to increase it
|
|
// (as a 'min violation') after we've flexed.
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "auto",
|
|
"_min-main-size": "150px",
|
|
"_main-size": [ "50px", "150px" ]
|
|
},
|
|
{
|
|
"flex": "auto",
|
|
"_main-size": [ null, "50px" ]
|
|
}
|
|
]
|
|
},
|
|
|
|
// Test min-size on multiple items simultaneously:
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "auto",
|
|
"_min-main-size": "20px",
|
|
"_main-size": [ null, "20px" ]
|
|
},
|
|
{
|
|
"flex": "9 auto",
|
|
"_min-main-size": "150px",
|
|
"_main-size": [ "50px", "180px" ]
|
|
},
|
|
]
|
|
},
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "1 1 0px",
|
|
"_min-main-size": "90px",
|
|
"_main-size": [ null, "90px" ]
|
|
},
|
|
{
|
|
"flex": "1 1 0px",
|
|
"_min-main-size": "80px",
|
|
"_main-size": [ null, "80px" ]
|
|
},
|
|
{
|
|
"flex": "1 1 40px",
|
|
"_main-size": [ null, "30px" ]
|
|
}
|
|
]
|
|
},
|
|
|
|
// Test a case where _min-main-size will be violated on different items in
|
|
// successive iterations of the "resolve the flexible lengths" loop
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "1 2 100px",
|
|
"_min-main-size": "90px",
|
|
"_main-size": [ null, "90px" ]
|
|
},
|
|
{
|
|
"flex": "1 1 100px",
|
|
"_min-main-size": "70px",
|
|
"_main-size": [ null, "70px" ]
|
|
},
|
|
{
|
|
"flex": "1 1 100px",
|
|
"_main-size": [ null, "40px" ]
|
|
}
|
|
]
|
|
},
|
|
|
|
// Test some cases that have a min-size violation on one item and a
|
|
// max-size violation on another:
|
|
|
|
// Here, both items initially grow to 100px. That violates both
|
|
// items' sizing constraints (it's smaller than the min-size and larger than
|
|
// the max-size), so we clamp both of them and sum the clamping-differences:
|
|
//
|
|
// (130px - 100px) + (50px - 100px) = (30px) + (-50px) = -20px
|
|
//
|
|
// This sum is negative, so (per spec) we freeze the item that had its
|
|
// max-size violated (the second one) and restart the algorithm. This time,
|
|
// all the available space (200px - 50px = 150px) goes to the not-yet-frozen
|
|
// first item, and that puts it above its min-size, so all is well.
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "auto",
|
|
"_min-main-size": "130px",
|
|
"_main-size": [ null, "150px" ]
|
|
},
|
|
{
|
|
"flex": "auto",
|
|
"_max-main-size": "50px",
|
|
"_main-size": [ null, "50px" ]
|
|
},
|
|
]
|
|
},
|
|
|
|
// As above, both items initially grow to 100px, and that violates both items'
|
|
// constraints. However, now the sum of the clamping differences is:
|
|
//
|
|
// (130px - 100px) + (80px - 100px) = (30px) + (-20px) = 10px
|
|
//
|
|
// This sum is positive, so (per spec) we freeze the item that had its
|
|
// min-size violated (the first one) and restart the algorithm. This time,
|
|
// all the available space (200px - 130px = 70px) goes to the not-yet-frozen
|
|
// second item, and that puts it below its max-size, so all is well.
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "auto",
|
|
"_min-main-size": "130px",
|
|
"_main-size": [ null, "130px" ]
|
|
},
|
|
{
|
|
"flex": "auto",
|
|
"_max-main-size": "80px",
|
|
"_main-size": [ null, "70px" ]
|
|
},
|
|
]
|
|
},
|
|
|
|
// As above, both items initially grow to 100px, and that violates both items'
|
|
// constraints. So we clamp both items and sum the clamping differences to
|
|
// see what to do next. The sum is:
|
|
//
|
|
// (80px - 100px) + (120px - 100px) = (-20px) + (20px) = 0px
|
|
//
|
|
// Per spec, if the sum is 0, we're done -- we leave both items at their
|
|
// clamped sizes.
|
|
{
|
|
items:
|
|
[
|
|
{
|
|
"flex": "auto",
|
|
"_max-main-size": "80px",
|
|
"_main-size": [ null, "80px" ]
|
|
},
|
|
{
|
|
"flex": "auto",
|
|
"_min-main-size": "120px",
|
|
"_main-size": [ null, "120px" ]
|
|
},
|
|
]
|
|
},
|
|
];
|