<!DOCTYPE html>
<html>
<head>
<link href="resources/grid.css" rel="stylesheet">
<style>
.grid {
    grid-template-areas: "firstArea secondArea"
                                 "thirdArea thirdArea";
}

#oneValueGridArea {
    grid-area: 1;
}

#oneValueIdentGridArea {
    grid-area: thirdArea;
}

#twoValueGridArea {
    grid-area: -1 / span 1;
}

#twoValueIdentGridArea {
    grid-area: firstArea / secondArea;
}

#threeValueGridArea {
    grid-area: span 1 / 10 / -1;
}

#fourValueGridArea {
    grid-area: -5 / 5 span / span 8 / 9;
}

#fourValueMixedGridArea {
    grid-area: firstArea / span 1 / nonexistent / 1 foobar;
}
</style>
<script src="../../resources/js-test-pre.js"></script>
</head>
<body>
<div class="grid">
    <div id="oneValueGridArea"></div>
    <div id="oneValueIdentGridArea"></div>
    <div id="twoValueGridArea"></div>
    <div id="twoValueIdentGridArea"></div>
    <div id="threeValueGridArea"></div>
    <div id="fourValueGridArea"></div>
    <div id="fourValueMixedGridArea"></div>
</div>
<script>
    description('This test checks that grid-area is properly parsed and stored internally.');
    function valueOrDefaultGridPosition(gridPosition)
    {
        return gridPosition === undefined ? "auto" : gridPosition;
    }

    function checkColumnRowValues(gridItem, gridRowStart, gridColumnStart, gridRowEnd, gridColumnEnd)
    {
        this.gridItem = gridItem;
        shouldBeEqualToString("getComputedStyle(gridItem, '').getPropertyValue('grid-row-start')", gridRowStart);
        shouldBeEqualToString("getComputedStyle(gridItem, '').getPropertyValue('grid-column-start')", valueOrDefaultGridPosition(gridColumnStart));

        shouldBeEqualToString("getComputedStyle(gridItem, '').getPropertyValue('grid-row-end')", valueOrDefaultGridPosition(gridRowEnd));
        shouldBeEqualToString("getComputedStyle(gridItem, '').getPropertyValue('grid-column-end')", valueOrDefaultGridPosition(gridColumnEnd));
    }

    function testGridAreaCSSParsing(gridItemId, gridRowStart, gridColumnStart, gridRowEnd, gridColumnEnd)
    {
        checkColumnRowValues(document.getElementById(gridItemId), gridRowStart, gridColumnStart, gridRowEnd, gridColumnEnd);
    }

    function testGridAreaJSParsing(gridAreaValue)
    {
        var element = document.createElement("div");
        document.body.appendChild(element);
        // Pre-fill it with values to detect that we properly handle and reset unset values.
        element.style.gridArea = "1 / 2 / 3 / 4";
        element.style.gridArea = gridAreaValue;

        // Get the different values.
        var gridColumnRowValues = gridAreaValue.split("/");
        var gridColumnStart = gridColumnRowValues[1] ? gridColumnRowValues[1].trim() : undefined;
        var gridRowEnd = gridColumnRowValues[2] ? gridColumnRowValues[2].trim() : undefined;
        var gridColumnEnd = gridColumnRowValues[3] ? gridColumnRowValues[3].trim() : undefined;
        checkColumnRowValues(element, gridColumnRowValues[0].trim(), gridColumnStart, gridRowEnd, gridColumnEnd);
        document.body.removeChild(element);
    }

    function testGridAreaInvalidJSParsing(gridAreaValue)
    {
        var element = document.createElement("div");
        document.body.appendChild(element);
        checkColumnRowValues(element, "auto", "auto", "auto", "auto");
        document.body.removeChild(element);
    }

    debug("Test getting grid-area set through CSS");
    testGridAreaCSSParsing("oneValueGridArea", "1");
    testGridAreaCSSParsing("oneValueIdentGridArea", "thirdArea", "thirdArea", "thirdArea", "thirdArea");
    testGridAreaCSSParsing("twoValueGridArea", "-1", "span 1");
    testGridAreaCSSParsing("twoValueIdentGridArea", "firstArea", "secondArea", "firstArea", "secondArea");
    testGridAreaCSSParsing("threeValueGridArea", "span 1", "10", "-1");
    testGridAreaCSSParsing("fourValueGridArea", "-5", "span 5", "span 8", "9");
    testGridAreaCSSParsing("fourValueMixedGridArea", "firstArea", "span 1", "nonexistent", "1 foobar");

    debug("");
    debug("Test getting and setting grid-area set through JS");
    testGridAreaJSParsing("-1");
    testGridAreaJSParsing("-1 / span 5");
    testGridAreaJSParsing("-1 / 10 / span 3");

    debug("");
    debug("Test setting some positions to invalid values through JS");
    testGridAreaInvalidJSParsing("span / span / span /");
    testGridAreaInvalidJSParsing("1/ span span / 1 / span");
    testGridAreaInvalidJSParsing("span / 1 / -1 / 1 -1");
    testGridAreaInvalidJSParsing("span / 1 / -1 / 1 span -1");
</script>
</body>
</html>