mirror of
https://github.com/servo/servo
synced 2026-04-29 10:57:43 +02:00
419 lines
16 KiB
JavaScript
419 lines
16 KiB
JavaScript
// Simple implementation of SVG sizing
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setup({explicit_done: true});
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var SVGSizing = (function() {
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function parseLength(l) {
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var match = /^([-+]?[0-9]+|[-+]?[0-9]*\.[0-9]+)(px|%)?$/.exec(l);
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if (!match)
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return null;
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return new Length(Number(match[1]), match[2] ? match[2] : "px");
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}
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function parseViewBox(input) {
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if (!input)
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return null;
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var arr = input.split(' ');
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return arr.map(function(a) { return parseInt(a); });
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}
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// Only px and % are used
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function convertToPx(input, percentRef) {
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if (input == null)
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return null;
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var length = parseLength(input);
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if (length.amount == 0)
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return 0;
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if (!length.unit)
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length.unit = "px";
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if (length.unit == "%" && percentRef === undefined)
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return null;
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return length.amount * { px: 1,
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"%": percentRef/100}[length.unit];
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}
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function Length(amount, unit) {
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this.amount = amount;
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this.unit = unit;
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}
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function describe(data) {
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function dumpObject(obj) {
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var r = "";
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for (var property in obj) {
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if (obj.hasOwnProperty(property)) {
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var value = obj[property];
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if (typeof value == 'string')
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value = "'" + value + "'";
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else if (value == null)
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value = "null";
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else if (typeof value == 'object')
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{
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if (value instanceof Array)
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value = "[" + value + "]";
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else
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value = "{" + dumpObject(value) + "}";
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}
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if (value != "null")
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r += property + ": " + value + ", ";
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}
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}
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return r;
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}
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var result = dumpObject(data);
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if (result == "")
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return "(initial values)";
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return result;
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}
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function mapPresentationalHintLength(testData, cssProperty, attr) {
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if (attr) {
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var l = parseLength(attr);
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if (l)
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testData.style[cssProperty] = l.amount + l.unit;
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}
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}
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function computedWidthIsAuto(testData) {
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return !testData.style["width"] || testData.style["width"] == 'auto';
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}
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function computedHeightIsAuto(testData) {
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return !testData.style["height"] || testData.style["height"] == 'auto' ||
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(parseLength(testData.style["height"]).unit == '%' &&
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containerComputedHeightIsAuto(testData));
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}
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function containerComputedWidthIsAuto(testData) {
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return !testData.config.containerWidthStyle ||
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testData.config.containerWidthStyle == 'auto';
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}
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function containerComputedHeightIsAuto(testData) {
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return !testData.config.containerHeightStyle ||
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testData.config.containerHeightStyle == 'auto';
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}
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function intrinsicInformation(testData) {
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if (testData.config.placeholder == 'iframe')
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return {};
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var w = convertToPx(testData.config.svgWidthAttr) || 0;
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var h = convertToPx(testData.config.svgHeightAttr) || 0;
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var r = 0;
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if (w && h) {
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r = w / h;
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} else {
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var vb = parseViewBox(testData.config.svgViewBoxAttr);
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if (vb) {
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r = vb[2] / vb[3];
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}
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if (r) {
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if (!w && h)
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w = h * r;
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else if (!h && w)
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h = w / r;
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}
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}
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return { width: w, height: h, ratio: r };
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};
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function contentAttributeForPlaceholder(testData) {
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if (testData.config.placeholder == 'object')
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return "data";
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else
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return "src";
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}
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function TestData(config) {
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this.config = config;
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this.name = describe(config);
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this.style = {};
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if (config.placeholder) {
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mapPresentationalHintLength(this, "width", config.placeholderWidthAttr);
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mapPresentationalHintLength(this, "height", config.placeholderHeightAttr);
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} else {
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if (config.svgWidthStyle)
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this.style["width"] = config.svgWidthStyle;
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else
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mapPresentationalHintLength(this, "width", config.svgWidthAttr);
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if (config.svgHeightStyle)
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this.style["height"] = config.svgHeightStyle;
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else
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mapPresentationalHintLength(this, "height", config.svgHeightAttr);
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}
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}
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TestData.prototype.computeInlineReplacedSize = function(outerWidth, outerHeight) {
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var intrinsic = intrinsicInformation(this);
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var self = this;
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// http://www.w3.org/TR/CSS2/visudet.html#inline-replaced-height
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function calculateUsedHeight() {
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if (computedHeightIsAuto(self)) {
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if (computedWidthIsAuto(self) && intrinsic.height)
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return intrinsic.height;
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if (intrinsic.ratio)
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return calculateUsedWidth() / intrinsic.ratio;
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if (intrinsic.height)
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return intrinsic.height;
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return 150;
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}
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return convertToPx(self.style["height"],
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convertToPx(self.config.containerHeightStyle,
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outerHeight));
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}
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// http://www.w3.org/TR/CSS2/visudet.html#inline-replaced-width
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function calculateUsedWidth() {
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if (computedWidthIsAuto(self)) {
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if (computedHeightIsAuto(self) && intrinsic.width)
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return intrinsic.width;
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if (!computedHeightIsAuto(self) && intrinsic.ratio)
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return calculateUsedHeight() * intrinsic.ratio;
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if (computedHeightIsAuto(self) && intrinsic.ratio) {
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if (containerComputedWidthIsAuto(self)) {
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// Note: While this is actually undefined in CSS
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// 2.1, use the suggested value by examining the
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// ancestor widths.
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return outerWidth;
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} else {
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return convertToPx(self.config.containerWidthStyle,
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outerWidth);
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}
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}
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if (intrinsic.width)
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return intrinsic.width;
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return 300;
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}
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if (containerComputedWidthIsAuto(self))
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return convertToPx(self.style["width"], outerWidth);
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else
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return convertToPx(self.style["width"],
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convertToPx(self.config.containerWidthStyle,
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outerWidth));
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}
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return { width: calculateUsedWidth(),
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height: calculateUsedHeight() };
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};
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TestData.prototype.buildContainer = function (placeholder, options) {
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options = options || {};
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var container = document.createElement("div");
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container.id = "container";
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if (this.config.containerWidthStyle)
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container.style.width = this.config.containerWidthStyle;
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if (this.config.containerHeightStyle)
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container.style.height = this.config.containerHeightStyle;
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if (options.pretty)
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container.appendChild(document.createTextNode("\n\t\t"));
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container.appendChild(placeholder);
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if (options.pretty)
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container.appendChild(document.createTextNode("\n\t"));
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return container;
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};
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TestData.prototype.buildSVGOrPlaceholder = function (options) {
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options = options || {};
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var self = this;
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if (this.config.placeholder) {
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var generateSVGURI = function(testData, encoder) {
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var res = '<svg xmlns="http://www.w3.org/2000/svg"';
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function addAttr(attr, prop) {
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if (testData.config[prop])
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res += ' ' + attr + '="' + testData.config[prop] + '"';
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}
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addAttr("width", "svgWidthAttr");
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addAttr("height", "svgHeightAttr");
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addAttr("viewBox", "svgViewBoxAttr");
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res += '></svg>';
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return 'data:image/svg+xml' + encoder(res);
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};
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var placeholder = document.createElement(this.config.placeholder);
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if (options.pretty) {
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placeholder.appendChild(document.createTextNode("\n\t\t\t"));
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placeholder.appendChild(
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document.createComment(
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generateSVGURI(this, function(x) { return "," + x; })));
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placeholder.appendChild(document.createTextNode("\n\t\t"));
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}
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placeholder.setAttribute("id", "test");
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if (this.config.placeholderWidthAttr)
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placeholder.setAttribute("width", this.config.placeholderWidthAttr);
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if (this.config.placeholderHeightAttr)
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placeholder.setAttribute("height", this.config.placeholderHeightAttr);
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placeholder.setAttribute(contentAttributeForPlaceholder(this),
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generateSVGURI(this, function(x) {
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return ";base64," + btoa(x);
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}));
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return placeholder;
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} else {
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var svgElement = document.createElementNS("http://www.w3.org/2000/svg", "svg");
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svgElement.setAttribute("id", "test");
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if (self.config.svgWidthStyle)
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svgElement.style.width = self.config.svgWidthStyle;
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if (self.config.svgHeightStyle)
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svgElement.style.height = self.config.svgHeightStyle;
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if (self.config.svgWidthAttr)
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svgElement.setAttribute("width", self.config.svgWidthAttr);
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if (self.config.svgHeightAttr)
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svgElement.setAttribute("height", self.config.svgHeightAttr);
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if (self.config.svgViewBoxAttr)
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svgElement.setAttribute("viewBox", self.config.svgViewBoxAttr);
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return svgElement;
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}
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};
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TestData.prototype.buildDemo = function (expectedRect, id) {
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// Non-essential debugging tool
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var self = this;
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function buildDemoSerialization() {
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var outerWidth = 800;
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var outerHeight = 600;
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var options = { pretty: true };
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var container =
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self.buildContainer(self.buildSVGOrPlaceholder(options), options);
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var root = document.createElement("html");
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var style = document.createElement("style");
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style.textContent = "\n" +
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"\tbody { margin: 0; font-family: sans-serif }\n" +
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"\tiframe { border: none }\n" +
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"\t#expected {\n" +
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"\t\twidth: " + (expectedRect.width) + "px; height: "
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+ (expectedRect.height) + "px;\n" +
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"\t\tborder: 10px solid lime; position: absolute;\n" +
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"\t\tbackground-color: red }\n" +
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"\t#testContainer { position: absolute;\n" +
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"\t\ttop: 10px; left: 10px; width: " + outerWidth + "px;\n" +
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"\t\theight: " + outerHeight + "px }\n" +
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"\t#test { background-color: green }\n" +
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"\t.result { position: absolute; top: 0; right: 0;\n" +
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"\t\tbackground-color: hsla(0,0%, 0%, 0.85); border-radius: 0.5em;\n" +
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"\t\tpadding: 0.5em; border: 0.25em solid black }\n" +
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"\t.pass { color: lime }\n" +
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"\t.fail { color: red }\n";
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root.appendChild(document.createTextNode("\n"));
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root.appendChild(style);
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root.appendChild(document.createTextNode("\n"));
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var script = document.createElement("script");
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script.textContent = "\n" +
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"onload = function() {\n" +
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"\tvar svgRect =\n" +
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"\t\tdocument.querySelector('#test').getBoundingClientRect();\n" +
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"\tpassed = (svgRect.width == " + expectedRect.width + " && " +
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"svgRect.height == " + expectedRect.height + ");\n" +
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"\tdocument.body.insertAdjacentHTML('beforeEnd',\n" +
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"\t\t'<span class=\"result '+ (passed ? 'pass' : 'fail') " +
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"+ '\">' + (passed ? 'Pass' : 'Fail') + '</span>');\n" +
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"};\n";
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root.appendChild(script);
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root.appendChild(document.createTextNode("\n"));
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var expectedElement = document.createElement("div");
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expectedElement.id = "expected";
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root.appendChild(expectedElement);
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root.appendChild(document.createTextNode("\n"));
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var testContainer = document.createElement("div");
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testContainer.id = "testContainer";
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testContainer.appendChild(document.createTextNode("\n\t"));
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testContainer.appendChild(container);
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testContainer.appendChild(document.createTextNode("\n"));
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root.appendChild(testContainer);
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root.appendChild(document.createTextNode("\n"));
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return "<!DOCTYPE html>\n" + root.outerHTML;
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}
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function pad(n, width, z) {
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z = z || '0';
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n = n + '';
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return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
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}
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function heightToDescription(height) {
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if (!height || height == "auto")
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return "auto";
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if (parseLength(height).unit == '%')
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return "percentage";
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return "fixed";
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}
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var demoRoot = document.querySelector('#demo');
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if (demoRoot) {
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var demo = buildDemoSerialization();
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var iframe = document.createElement('iframe');
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iframe.style.width = (Math.max(900, expectedRect.width)) + "px";
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iframe.style.height = (Math.max(400, expectedRect.height)) + "px";
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iframe.src = "data:text/html;charset=utf-8," + encodeURIComponent(demo);
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demoRoot.appendChild(iframe);
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demoRoot.insertAdjacentHTML(
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'beforeEnd',
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'<p><a href="data:application/octet-stream;charset=utf-8;base64,' +
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btoa(demo) + '" download="svg-in-' + this.config.placeholder + "-" +
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heightToDescription(this.config.placeholderHeightAttr) + "-" + pad(id, 3) +
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'.html">Download</a></p>');
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}
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};
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return {
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TestData: TestData,
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doCombinationTest: function(values, func, testSingleId) {
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function computeConfig(id) {
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id--;
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var multiplier = 1;
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var config = {};
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for (var i=0; i<values.length; i++) {
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// Compute offset into current array
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var ii = (Math.floor(id / multiplier)) % values[i][1].length;
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// Set corresponding value
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config[values[i][0]] = values[i][1][ii];
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// Compute new multiplier
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multiplier *= values[i][1].length;
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}
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if (id >= multiplier)
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return null;
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return config;
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}
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function cont(id) {
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var config = computeConfig(id);
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if (config && (!testSingleId || testSingleId == id)) {
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var next = function() {func(config, id, cont)};
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// Make sure we don't blow the stack, without too much slowness
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if (id % 20 === 0) {
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setTimeout(next, 0);
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} else {
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next();
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}
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} else {
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done();
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}
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};
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if (testSingleId)
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cont(testSingleId);
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else
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cont(1);
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}
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};
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})();
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