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164 lines
6.6 KiB
HTML
164 lines
6.6 KiB
HTML
<!DOCTYPE html>
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<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api/#calculation-of-computed-values" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="./resources/utils.js"></script>
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<style>
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#divWithFontSizeSet, #parentDiv {
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font-size: 10px;
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}
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</style>
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<div id=divWithFontSizeSet></div>
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<div id=parentDiv>
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<div id=divWithFontSizeInherited></div>
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</div>
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<div id="ref"></div>
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<script>
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// Generate a property and temporarily set its value. Then call 'fn' with
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// the name of the generated property.
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function with_custom_property(element, reg, value, fn) {
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if (element.id.length == 0)
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throw 'The specified element must have an ID';
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let name = generate_property(reg);
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// Because we want to include the parsing step, insert a stylesheet
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// node with textContent.
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let node = document.createElement('style');
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node.textContent = `#${element.id} { ${name}:${value}; }`;
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document.body.append(node);
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try {
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fn(name);
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} finally {
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node.remove();
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}
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}
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function assert_computed_value(element, syntax, value, expected) {
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with_custom_property(element, syntax, value, (name) => {
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let actual = getComputedStyle(element).getPropertyValue(name);
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assert_equals(actual, expected);
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});
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}
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// Computes an absolute reference value for some length.
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//
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// E.g. to figure out how many pixels '10vh' is, do length_ref('10vh').
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function length_ref(value, refnode = ref) {
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try {
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// The reference property 'min-height' is chosen arbitrarily, but
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// avoid properties with "resolved value is used value"-behavior
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// [1], as it may affect rounding, and custom properties do not
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// have this behavior.
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//
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// [1] https://drafts.csswg.org/cssom/#resolved-values
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const ref_property = 'min-height';
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refnode.style = `${ref_property}: ${value}`;
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return getComputedStyle(refnode).getPropertyValue(ref_property);
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} finally {
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refnode.style = '';
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}
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}
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function test_computed_value(syntax, value, expected) {
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test(function() {
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assert_computed_value(divWithFontSizeSet, syntax, value, expected);
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}, `${syntax} values are computed correctly [${value}]`);
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}
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test(function(){
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const element = divWithFontSizeSet;
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with_custom_property(element, '<length>', '14em', (name) => {
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assert_computed_value(element, '<length>', `var(${name})`, '140px');
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});
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}, '<length> values computed are correctly via var()-reference');
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test(function(){
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const element = divWithFontSizeInherited;
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with_custom_property(element, '<length>', '14em', (name) => {
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assert_computed_value(element, '<length>', `var(${name})`, '140px');
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});
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}, '<length> values computed are correctly via var()-reference when font-size is inherited');
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test(function(){
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const element = divWithFontSizeInherited;
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assert_computed_value(element, '<length>', '14em', '140px');
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}, '<length> values are computed correctly when font-size is inherited [14em]');
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test(function(){
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const element = divWithFontSizeInherited;
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assert_computed_value(element, '<length>', 'calc(14em + 10px)', '150px');
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}, '<length> values are computed correctly when font-size is inherited [calc(14em + 10px)]');
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test_computed_value('<length>', '12px', '12px');
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test_computed_value('<length>', '13vw', length_ref('13vw'));
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test_computed_value('<length>', '14em', '140px');
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test_computed_value('<length>', '15vmin', length_ref('15vmin'));
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test_computed_value('<length>', 'calc(16px - 7em + 10vh)', length_ref('calc(10vh - 54px)'));
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test_computed_value('<length-percentage>', '17em', '170px');
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test_computed_value('<length-percentage>', '18%', '18%');
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test_computed_value('<length-percentage>', 'calc(19em - 2%)', 'calc(190px + -2%)');
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test_computed_value('<length>#', '10px, 3em', '10px, 30px');
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test_computed_value('<length>#', '4em ,9px', '40px, 9px');
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test_computed_value('<length>#', '8em', '80px');
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test_computed_value('<length-percentage>#', '3% , 10vmax , 22px', ['3%', length_ref('10vmax'), '22px'].join(', '));
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test_computed_value('<length-percentage>#', 'calc(50% + 1em), 4px', 'calc(10px + 50%), 4px');
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test_computed_value('<length-percentage>#', 'calc(13% + 37px)', 'calc(37px + 13%)');
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test_computed_value('<length>+', '10px 3em', '10px 30px');
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test_computed_value('<length>+', '4em 9px', '40px 9px');
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test_computed_value('<length-percentage>+', '3% 10vmax 22px', ['3%', length_ref('10vmax'), '22px'].join(' '));
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test_computed_value('<length-percentage>+', 'calc(50% + 1em) 4px', 'calc(10px + 50%) 4px');
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test_computed_value('<transform-function>', 'translateX(2px)', 'translateX(2px)');
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test_computed_value('<transform-function>', 'translateX(10em)', 'translateX(100px)');
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test_computed_value('<transform-function>', 'translateX(calc(11em + 10%))', 'translateX(calc(110px + 10%))');
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test_computed_value('<transform-function>+', 'translateX(10%) scale(2)', 'translateX(10%) scale(2)');
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test_computed_value('<integer>', '15', '15');
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test_computed_value('<integer>', 'calc(15 + 15)', '30');
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test_computed_value('<integer>', 'calc(2.4)', '2');
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test_computed_value('<integer>', 'calc(2.6)', '3');
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test_computed_value('<integer>', 'calc(2.6 + 3.1)', '6');
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test_computed_value('<integer>+', '15 calc(2.4) calc(2.6)', '15 2 3');
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test_computed_value('<color>', '#ff0000', 'rgb(255, 0, 0)');
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test_computed_value('<color>', '#000f00', 'rgb(0, 15, 0)');
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test_computed_value('<color>', '#00000a', 'rgb(0, 0, 10)');
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test_computed_value('<color>', '#badbee', 'rgb(186, 219, 238)');
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test_computed_value('<color>', '#badbee33', 'rgba(186, 219, 238, 0.2)');
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test_computed_value('<color>', 'tomato', 'rgb(255, 99, 71)');
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test_computed_value('<color>', 'plum', 'rgb(221, 160, 221)');
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test_computed_value('<color>', 'currentcolor', 'currentcolor');
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// Custom ident values that look like color keywords should not be converted.
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test_computed_value('*', 'tomato', 'tomato');
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test_computed_value('tomato | plum', 'plum', 'plum');
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test_computed_value('tomato | plum | <color>', 'plum', 'plum');
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test_computed_value('*', '-50grad', '-50grad');
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test_computed_value('<angle>', '180deg', '180deg');
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test_computed_value('<angle>', '400grad', '360deg');
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test_computed_value('<angle>', 'calc(360deg + 400grad)', '720deg');
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test_computed_value('*', '50s', '50s');
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test_computed_value('<time>', '1s', '1s');
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test_computed_value('<time>', '1000ms', '1s');
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test_computed_value('<time>', 'calc(1000ms + 1s)', '2s');
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test_computed_value('*', '50dpi', '50dpi');
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test_computed_value('<resolution>', '1dppx', '1dppx');
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test_computed_value('<resolution>', '96dpi', '1dppx');
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test_computed_value('<resolution>', 'calc(1dppx + 96dpi)', '2dppx');
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</script>
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