// global async_test, assert_equals
//
// This test generates a couple of scenarios (each a TestData) for
// sizing SVG inside an inline <object> and has a simple JavaScript
// sizing implementation that handles the generated scenarios. It
// generates a DOM corresponding to the scenario and compares the laid
// out size to the calculated size.
//
// The tests loops through different combinations of:
//
// * width and height on <object>
//
// * width and height on <svg>
//
// * viewBox on <svg> (gives intrinsic ratio)
//
// * width and height on containing block of <object>
//
// All these contribute to the final size of the SVG in some way.
//
// The test focuses on the size of the CSS box generated by the SVG.
// The SVG is always empty by itself so no actual SVG are tested.
//
// Focus is also put on how the different attributes interact, little
// focus is put on variations within an attribute that doesn't affect
// the relationship to other attributes, i.e only px and % units are
// used since that covers the interactions.
//
// To debug a specific test append ?<test-id> to the URL. An <iframe>
// is generated with equivalent test and the source of the test is
// added to a <pre> element.
//
// Note: placeholder is an alternative name for the tested <object>
// element; 'object' becomes such an ambigious name when placed in
// code.
(function() {
function parseLength(l) {
var match = /^([-+]?[0-9]+|[-+]?[0-9]*\.[0-9]+)(px|%)?$/.exec(l);
if (!match)
return null;
return new Length(Number(match[1]), match[2] ? match[2] : "px");
}
function parseViewBox(input) {
if (!input)
return null;
var arr = input.split(' ');
return arr.map(function(a) { return parseInt(a); });
}
// Only px and % are used
function convertToPx(input, percentRef) {
if (input == null)
return null;
var length = parseLength(input);
if (length.amount == 0)
return 0;
if (!length.unit)
length.unit = "px";
if (length.unit == "%" && percentRef === undefined)
return null;
return length.amount * { px: 1,
"%": percentRef/100}[length.unit];
}
function Length(amount, unit) {
this.amount = amount;
this.unit = unit;
}
function describe(data) {
function dumpObject(obj) {
var r = "";
for (var property in obj) {
if (obj.hasOwnProperty(property)) {
var value = obj[property];
if (typeof value == 'string')
value = "'" + value + "'";
else if (value == null)
value = "null";
else if (typeof value == 'object')
{
if (value instanceof Array)
value = "[" + value + "]";
else
value = "{" + dumpObject(value) + "}";
}
if (value != "null")
r += property + ": " + value + ", ";
}
}
return r;
}
var result = dumpObject(data);
if (result == "")
return "(initial values)";
return result;
}
function TestData(config) {
this.config = config;
this.name = describe(config);
this.style = {};
this.mapPresentationalHintLength("width", config.placeholderWidthAttr);
this.mapPresentationalHintLength("height", config.placeholderHeightAttr);
}
TestData.prototype.mapPresentationalHintLength =
function(cssProperty, attr) {
if (attr) {
var l = parseLength(attr);
if (l)
this.style[cssProperty] = l.amount + l.unit;
}
};
TestData.prototype.computedWidthIsAuto = function() {
return !this.style["width"] || this.style["width"] == 'auto';
};
TestData.prototype.computedHeightIsAuto = function() {
return !this.style["height"] || this.style["height"] == 'auto' ||
(parseLength(this.style["height"]).unit == '%' &&
this.containerComputedHeightIsAuto());
};
TestData.prototype.containerComputedWidthIsAuto = function() {
return !this.config.containerWidthStyle ||
this.config.containerWidthStyle == 'auto';
};
TestData.prototype.containerComputedHeightIsAuto = function() {
return !this.config.containerHeightStyle ||
this.config.containerHeightStyle == 'auto';
};
TestData.prototype.intrinsicInformation = function() {
var w = convertToPx(this.config.svgWidthAttr) || 0;
var h = convertToPx(this.config.svgHeightAttr) || 0;
var r = 0;
if (w && h) {
r = w / h;
} else {
var vb = parseViewBox(this.config.svgViewBoxAttr);
if (vb) {
r = vb[2] / vb[3];
}
if (r) {
if (!w && h)
w = h * r;
else if (!h && w)
h = w / r;
}
}
return { width: w, height: h, ratio: r };
};
TestData.prototype.computeInlineReplacedSize = function() {
var intrinsic = this.intrinsicInformation();
var self = this;
// http://www.w3.org/TR/CSS2/visudet.html#inline-replaced-height
function calculateUsedHeight() {
if (self.computedHeightIsAuto()) {
if (self.computedWidthIsAuto() && intrinsic.height)
return intrinsic.height;
if (intrinsic.ratio)
return calculateUsedWidth() / intrinsic.ratio;
if (intrinsic.height)
return intrinsic.height;
return 150;
}
return convertToPx(self.style["height"],
convertToPx(self.config.containerHeightStyle,
self.outerHeight));
}
// http://www.w3.org/TR/CSS2/visudet.html#inline-replaced-width
function calculateUsedWidth() {
if (self.computedWidthIsAuto()) {
if (self.computedHeightIsAuto() && intrinsic.width)
return intrinsic.width;
if (!self.computedHeightIsAuto() && intrinsic.ratio)
return calculateUsedHeight() * intrinsic.ratio;
if (self.computedHeightIsAuto() && intrinsic.ratio) {
if (self.containerComputedWidthIsAuto()) {
// Note: While this is actually undefined in CSS
// 2.1, use the suggested value by examining the
// ancestor widths.
return self.outerWidth;
} else {
return convertToPx(self.config.containerWidthStyle,
self.outerWidth);
}
}
if (intrinsic.width)
return intrinsic.width;
return 300;
}
if (self.containerComputedWidthIsAuto())
return convertToPx(self.style["width"], self.outerWidth);
else
return convertToPx(self.style["width"],
convertToPx(self.config.containerWidthStyle,
self.outerWidth));
}
return { width: calculateUsedWidth(),
height: calculateUsedHeight() };
};
var testContainer = document.querySelector('#testContainer');
TestData.prototype.outerWidth = testContainer.getBoundingClientRect().width;
TestData.prototype.outerHeight = testContainer.getBoundingClientRect().height;
window.TestData = TestData;
})();
function setupContainer(testData, placeholder, options) {
options = options || {};
var container = document.createElement("div");
container.id = "container";
if (testData.config.containerWidthStyle)
container.style.width = testData.config.containerWidthStyle;
if (testData.config.containerHeightStyle)
container.style.height = testData.config.containerHeightStyle;
if (options.pretty)
container.appendChild(document.createTextNode("\n\t\t"));
container.appendChild(placeholder);
if (options.pretty)
container.appendChild(document.createTextNode("\n\t"));
return container;
}
function setupPlaceholder(testData, options) {
options = options || {};
function generateSVGURI(testData, encoder) {
var res = '<svg xmlns="http://www.w3.org/2000/svg"';
function addAttr(attr, prop) {
if (testData.config[prop])
res += ' ' + attr + '="' + testData.config[prop] + '"';
}
addAttr("width", "svgWidthAttr");
addAttr("height", "svgHeightAttr");
addAttr("viewBox", "svgViewBoxAttr");
res += '></svg>';
return 'data:image/svg+xml' + encoder(res);
}
var placeholder = document.createElement("object");
if (options.pretty) {
placeholder.appendChild(document.createTextNode("\n\t\t\t"));
placeholder.appendChild(
document.createComment(
generateSVGURI(testData, function(x) { return "," + x; })));
placeholder.appendChild(document.createTextNode("\n\t\t"));
}
placeholder.setAttribute("id", "test");
if (testData.config.placeholderWidthAttr)
placeholder.setAttribute("width", testData.config.placeholderWidthAttr);
if (testData.config.placeholderHeightAttr)
placeholder.setAttribute("height", testData.config.placeholderHeightAttr);
placeholder.setAttribute("data",
generateSVGURI(testData, function(x) {
return ";base64," + btoa(x);
}));
return placeholder;
}
function buildDemo(testData) {
// Non-essential debugging tool
var options = { pretty: true };
var expectedRect =
testData.computeInlineReplacedSize();
var container =
setupContainer(testData, setupPlaceholder(testData, options), options);
var root = document.createElement("html");
var style = document.createElement("style");
style.textContent = "\n" +
"\tbody { margin: 0; font-family: sans-serif }\n" +
"\t#expected {\n" +
"\t\twidth: " + (expectedRect.width) + "px; height: "
+ (expectedRect.height) + "px;\n" +
"\t\tborder: 10px solid lime; position: absolute;\n" +
"\t\tbackground-color: red }\n" +
"\t#testContainer { position: absolute;\n" +
"\t\ttop: 10px; left: 10px; width: 800px; height: 600px }\n" +
"\tobject { background-color: green }\n" +
"\t.result { position: absolute; top: 0; right: 0;\n" +
"\t\tbackground-color: hsla(0,0%, 0%, 0.85); border-radius: 0.5em;\n" +
"\t\tpadding: 0.5em; border: 0.25em solid black }\n" +
"\t.pass { color: lime }\n" +
"\t.fail { color: red }\n";
root.appendChild(document.createTextNode("\n"));
root.appendChild(style);
root.appendChild(document.createTextNode("\n"));
var script = document.createElement("script");
script.textContent = "\n" +
"onload = function() {\n" +
"\tvar objectRect = \n" +
"\t\tdocument.querySelector('#test').getBoundingClientRect();\n" +
"\tpassed = (objectRect.width == " + expectedRect.width + " && " +
"objectRect.height == " + expectedRect.height + ");\n" +
"\tdocument.body.insertAdjacentHTML('beforeEnd',\n" +
"\t\t'<span class=\"result '+ (passed ? 'pass' : 'fail') " +
"+ '\">' + (passed ? 'Pass' : 'Fail') + '</span>');\n" +
"};\n";
root.appendChild(script);
root.appendChild(document.createTextNode("\n"));
var expectedElement = document.createElement("div");
expectedElement.id = "expected";
root.appendChild(expectedElement);
root.appendChild(document.createTextNode("\n"));
var testContainer = document.createElement("div");
testContainer.id = "testContainer";
testContainer.appendChild(document.createTextNode("\n\t"));
testContainer.appendChild(container);
testContainer.appendChild(document.createTextNode("\n"));
root.appendChild(testContainer);
root.appendChild(document.createTextNode("\n"));
return "<!DOCTYPE html>\n" + root.outerHTML;
}
function doCombinationTest(values, func)
{
// Recursively construct all possible combinations of values and
// send them to |func|. Example:
//
// values: [["X", ["a", "b"]],
// ["Y", ["c", "d"]]]
//
// generates the objects:
//
// 1: { "X": "a", "Y": "c" }
// 2: { "X": "a", "Y": "d" }
// 3: { "X": "b", "Y": "c" }
// 4: { "X": "b", "Y": "d" }
//
// and each will be sent to |func| with the corresponding prefixed
// id (modulo order).
var combinationId = 1;
function doCombinationTestRecursive(slicedValues, config) {
if (slicedValues.length > 0) {
var configKey = slicedValues[0][0];
slicedValues[0][1].forEach(function(configValue) {
var new_config = {};
for (k in config)
new_config[k] = config[k];
new_config[configKey] = configValue;
doCombinationTestRecursive(slicedValues.slice(1), new_config);
});
} else {
func(config, combinationId++);
}
}
doCombinationTestRecursive(values, {});
}
var debugHint = function(id) { return "(append ?"+id+" to debug) " };
var testSingleId;
if (window.location.search) {
testSingleId = window.location.search.substring(1);
debugHint = function(id) { return ""; };
}
function testSVGInObjectWithPlaceholder(placeholderWidthAttr, placeholderHeightAttr, viewBoxAttr) {
doCombinationTest(
[["containerWidthStyle", [null, "400px"]],
["containerHeightStyle", [null, "400px"]],
["placeholderWidthAttr", [placeholderWidthAttr]],
["placeholderHeightAttr", [placeholderHeightAttr]],
["svgViewBoxAttr", [ viewBoxAttr ]],
["svgWidthAttr", [ null, "200", "25%" ]],
["svgHeightAttr", [ null, "200", "25%" ]]],
function(config, id) {
if (!testSingleId || testSingleId == id) {
var testData = new TestData(config);
var t = async_test(testData.name);
var expectedRect =
testData.computeInlineReplacedSize();
var placeholder = setupPlaceholder(testData);
var container =
setupContainer(testData, placeholder);
var checkSize = function() {
var placeholderRect =
placeholder.getBoundingClientRect();
try {
assert_approx_equals(placeholderRect.width,
expectedRect.width,
0.5,
debugHint(id) + "Wrong width");
assert_approx_equals(placeholderRect.height,
expectedRect.height,
0.5,
debugHint(id) + "Wrong height");
} finally {
testContainer.removeChild(container);
if (testSingleId)
document.body.removeChild(testContainer);
}
t.done();
};
t.step(function() {
placeholder.addEventListener('load', function() {
// setTimeout is a work-around to let engines
// finish layout of child browsing contexts even
// after the load event
setTimeout(t.step_func(checkSize), 0);
});
testContainer.appendChild(container);
});
}
if (testSingleId == id) {
var pad = function(n, width, z) {
z = z || '0';
n = n + '';
return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
};
var demo = buildDemo(testData);
var iframe = document.createElement('iframe');
iframe.style.width = (Math.max(900, expectedRect.width)) + "px";
iframe.style.height = (Math.max(400, expectedRect.height)) + "px";
iframe.src = "data:text/html;charset=utf-8," + encodeURIComponent(demo);
document.body.appendChild(iframe);
document.body.insertAdjacentHTML(
'beforeEnd',
'<p><a href="data:application/octet-stream;charset=utf-8;base64,' +
btoa(demo) + '" download="svg-in-object-test-' + pad(id, 3) + '.html">Download</a></p>');
}
});
}
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