mirror of
https://github.com/scratchfoundation/paper.js.git
synced 2024-12-29 09:22:22 -05:00
503 lines
18 KiB
JavaScript
503 lines
18 KiB
JavaScript
/*
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* Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
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* http://paperjs.org/
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*
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* Copyright (c) 2011 - 2016, Juerg Lehni & Jonathan Puckey
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* http://scratchdisk.com/ & http://jonathanpuckey.com/
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*
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* Distributed under the MIT license. See LICENSE file for details.
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*
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* All rights reserved.
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*/
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var isNode = typeof global === 'object',
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isPhantom = typeof window === 'object' && !!window.callPhantom,
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root;
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if (isNode) {
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root = global;
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// Resemble.js needs the Image constructor global.
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global.Image = paper.window.Image;
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} else {
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root = window;
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// This is only required when running in the browser:
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// Until window.history.pushState() works when running locally, we need to
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// trick qunit into thinking that the feature is not present. This appears
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// to work...
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// TODO: Ideally we should fix this in QUnit instead.
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delete window.history;
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window.history = {};
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QUnit.begin(function() {
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if (QUnit.urlParams.hidepassed) {
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document.getElementById('qunit-tests').className += ' hidepass';
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}
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});
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}
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// The unit-tests expect the paper classes to be global.
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paper.install(root);
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// Override console.error, so that we can catch errors that are only logged to
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// the console.
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var errorHandler = console.error;
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console.error = function() {
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QUnit.pushFailure([].join.call(arguments, ' '), QUnit.config.current.stack);
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errorHandler.apply(this, arguments);
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};
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QUnit.done(function(details) {
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console.error = errorHandler;
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});
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var currentProject;
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// NOTE: In order to "export" all methods into the shared Prepro.js scope when
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// using node-qunit, we need to define global functions as:
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// `var name = function() {}`. `function name() {}` does not work!
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var test = function(testName, expected) {
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return QUnit.test(testName, function(assert) {
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// Since tests can be asynchronous, remove the old project before
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// running the next test.
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if (currentProject)
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currentProject.remove();
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currentProject = new Project();
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expected(assert);
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});
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};
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// Override equals to convert functions to message and execute them as tests()
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var equals = function(actual, expected, message, options) {
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// Allow the use of functions for actual, which will get called and their
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// source content extracted for readable reports.
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if (typeof actual === 'function') {
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if (!message)
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message = getFunctionMessage(actual);
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actual = actual();
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}
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// Get the comparator based on the expected value's type only and ignore the
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// actual value's type.
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var type = typeof expected,
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cls;
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type = expected === null && 'Null'
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|| type === 'number' && 'Number'
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|| type === 'boolean' && 'Boolean'
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|| type === 'undefined' && 'Undefined'
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|| Array.isArray(expected) && 'Array'
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|| expected instanceof window.Element && 'Element' // handle DOM Elements
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|| (cls = expected && expected._class) // check _class 2nd last
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|| type === 'object' && 'Object'; // Object as catch-all
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var comparator = type && comparators[type];
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if (!message)
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message = type ? type.toLowerCase() : 'value';
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if (comparator) {
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comparator(actual, expected, message, options);
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} else if (expected && expected.equals) {
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// Fall back to equals
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QUnit.push(expected.equals(actual), actual, expected, message);
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} else {
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// Finally perform a strict compare
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QUnit.push(actual === expected, actual, expected, message);
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}
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if (options && options.cloned && cls) {
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var identical = identicalAfterCloning[cls];
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QUnit.push(identical ? actual === expected : actual !== expected,
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actual, identical ? expected : 'not ' + expected,
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message + ': identical after cloning');
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}
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};
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// A list of classes that should be identical after their owners were cloned.
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var identicalAfterCloning = {
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Gradient: true,
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SymbolDefinition: true
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};
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// Register a jsDump parser for Base.
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QUnit.jsDump.setParser('Base', function (obj, stack) {
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// Just compare the string representation of classes inheriting from Base,
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// since they hide the internal values.
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return obj.toString();
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});
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// Override the default object parser to handle Base objects.
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// We need to keep a reference to the previous implementation.
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var objectParser = QUnit.jsDump.parsers.object;
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QUnit.jsDump.setParser('object', function (obj, stack) {
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return (obj instanceof Base
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? QUnit.jsDump.parsers.Base
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: objectParser).call(this, obj, stack);
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});
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var compareProperties = function(actual, expected, properties, message, options) {
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for (var i = 0, l = properties.length; i < l; i++) {
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var key = properties[i];
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equals(actual[key], expected[key],
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message + ' (#' + key + ')', options);
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}
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};
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var comparePixels = function(actual, expected, message, options) {
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function rasterize(item, group, resolution) {
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var raster = null;
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if (group) {
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group.addChild(item);
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raster = group.rasterize(resolution, false);
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item.remove();
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}
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return raster;
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}
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function getImageTag(raster) {
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return '<img width="' + raster.width + '" height="' + raster.height
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+ '" src="' + raster.source + '">';
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}
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options = options || {};
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// In order to properly compare pixel by pixel, we need to put each item
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// into a group with a white background of the united dimensions of the
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// bounds of both items before rasterizing.
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var resolution = options.resolution || 72,
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actualBounds = actual.strokeBounds,
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expecedBounds = expected.strokeBounds,
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bounds = actualBounds.isEmpty()
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? expecedBounds
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: expecedBounds.isEmpty()
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? actualBounds
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: actualBounds.unite(expecedBounds);
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if (bounds.isEmpty()) {
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QUnit.equal('empty', 'empty', message);
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return;
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}
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var group = actual && expected && new Group({
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insert: false,
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children: [
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new Shape.Rectangle({
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rectangle: bounds,
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fillColor: 'white'
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})
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]
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}),
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actual = rasterize(actual, group, resolution),
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expected = rasterize(expected, group, resolution);
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if (!actual || !expected) {
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QUnit.push(false, null, null, 'Unable to compare rasterized items: ' +
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(!actual ? 'actual' : 'expected') + ' item is null',
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QUnit.stack(2));
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} else {
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// Use resemble.js to compare the two rasterized items.
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var id = QUnit.config.current.testId,
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index = QUnit.config.current.assertions.length + 1,
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result;
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if (!resemble._setup) {
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resemble._setup = true;
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resemble.outputSettings({
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errorColor: { red: 255, green: 51, blue: 0 },
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errorType: 'flat',
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transparency: 1
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});
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}
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resemble(actual.getImageData())
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.compareTo(expected.getImageData())
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.ignoreAntialiasing()
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// When working with imageData, this call is synchronous:
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.onComplete(function(data) { result = data; });
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// Compare with tolerance in percentage...
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var tolerance = (options.tolerance || 1e-4) * 100,
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fixed = ((1 / tolerance) + '').length - 1,
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identical = result ? 100 - result.misMatchPercentage : 0,
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reached = identical.toFixed(fixed),
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hundred = (100).toFixed(fixed),
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ok = reached == hundred,
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text = reached + '% identical';
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QUnit.push(ok, text, hundred + '% identical', message);
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if (!ok && result && !isNode) {
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// Get the right entry for this unit test and assertion, and
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// replace the results with images
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var entry = document.getElementById('qunit-test-output-' + id)
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.querySelector('li:nth-child(' + (index) + ')'),
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bounds = result.diffBounds;
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entry.querySelector('.test-expected td').innerHTML =
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getImageTag(expected);
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entry.querySelector('.test-actual td').innerHTML =
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getImageTag(actual);
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entry.querySelector('.test-diff td').innerHTML = '<pre>' + text
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+ '</pre><br>'
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+ '<img src="' + result.getImageDataUrl() + '">';
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}
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}
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};
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var compareItem = function(actual, expected, message, options, properties) {
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options = options || {};
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if (options.rasterize) {
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comparePixels(actual, expected, message, options);
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} else {
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if (options.cloned)
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QUnit.notStrictEqual(actual.id, expected.id,
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message + ' (not #id)');
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QUnit.strictEqual(actual.constructor, expected.constructor,
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message + ' (#constructor)');
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// When item is cloned and has a name, the name will be versioned:
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equals(actual.name,
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options.cloned && expected.name
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? expected.name + ' 1' : expected.name,
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message + ' (#name)');
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compareProperties(actual, expected, ['children', 'bounds', 'position',
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'matrix', 'data', 'opacity', 'locked', 'visible', 'blendMode',
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'selected', 'fullySelected', 'clipMask', 'guide'],
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message, options);
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if (properties)
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compareProperties(actual, expected, properties, message, options);
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// Style
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var styles = ['fillColor',
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'strokeColor', 'strokeCap', 'strokeJoin', 'dashArray',
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'dashOffset', 'miterLimit'];
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if (expected instanceof TextItem)
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styles.push('fontSize', 'font', 'leading', 'justification');
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compareProperties(actual.style, expected.style, styles,
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message + ' (#style)', options);
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}
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};
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// A list of comparator functions, based on `expected` type. See equals() for
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// an explanation of how the type is determined.
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var comparators = {
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Null: QUnit.strictEqual,
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Undefined: QUnit.strictEqual,
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Boolean: QUnit.strictEqual,
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Object: function(actual, expected, message, options) {
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QUnit.push(Base.equals(actual, expected), actual, expected, message);
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},
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Element: function(actual, expected, message, options) {
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// Convention: Loop through the attribute lists of both actual and
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// expected element, and compare values even if they may be inherited.
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// This is to handle styling values on SVGElement items more flexibly.
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equals(actual && actual.tagName, expected.tagName,
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(message || '') + ' (#tagName)', options);
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for (var i = 0; i < expected.attributes.length; i++) {
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var attr = expected.attributes[i];
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if (attr.specified) {
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equals(actual && actual.getAttribute(attr.name), attr.value,
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(message || '') + ' (#' + attr.name + ')', options);
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}
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}
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for (var i = 0; i < actual && actual.attributes.length; i++) {
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var attr = actual.attributes[i];
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if (attr.specified) {
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equals(attr.value, expected.getAttribute(attr.name)
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(message || '') + ' #(' + attr.name + ')', options);
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}
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}
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},
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Base: function(actual, expected, message, options) {
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comparators.Object(actual, expected, message, options);
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},
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Number: function(actual, expected, message, options) {
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// Compare with a default tolerance of 1e-5:
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var ok = Math.abs(actual - expected)
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<= Base.pick(options && options.tolerance, 1e-5);
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QUnit.push(ok, ok ? expected : actual, expected, message);
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},
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Array: function(actual, expected, message, options) {
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QUnit.strictEqual(actual.length, expected.length, message
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+ ' (#length)');
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for (var i = 0, l = actual.length; i < l; i++) {
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equals(actual[i], expected[i], (message || '') + '[' + i + ']',
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options);
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}
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},
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Point: function(actual, expected, message, options) {
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comparators.Number(actual.x, expected.x, message + ' (#x)', options);
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comparators.Number(actual.y, expected.y, message + ' (#y)', options);
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},
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Size: function(actual, expected, message, options) {
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comparators.Number(actual.width, expected.width,
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message + ' (#width)', options);
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comparators.Number(actual.height, expected.height,
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message + ' (#height)', options);
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},
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Rectangle: function(actual, expected, message, options) {
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comparators.Point(actual, expected, message, options);
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comparators.Size(actual, expected, message, options);
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},
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Matrix: function(actual, expected, message, options) {
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comparators.Array(actual.values, expected.values, message, options);
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},
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Color: function(actual, expected, message, options) {
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if (actual && expected) {
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equals(actual.type, expected.type, message + ' (#type)', options);
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// NOTE: This also compares gradients, with identity checks and all.
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equals(actual.components, expected.components,
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message + ' (#components)', options);
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} else {
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QUnit.strictEqual(actual, expected, message);
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}
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},
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Segment: function(actual, expected, message, options) {
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compareProperties(actual, expected, ['handleIn', 'handleOut', 'point',
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'selected'], message, options);
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},
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SegmentPoint: function(actual, expected, message, options) {
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comparators.Point(actual, expected, message, options);
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comparators.Boolean(actual.selected, expected.selected,
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message + ' (#selected)', options);
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},
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Item: compareItem,
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Group: function(actual, expected, message, options) {
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compareItem(actual, expected, message, options, ['clipped']);
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},
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Layer: function(actual, expected, message, options) {
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compareItem(actual, expected, message, options);
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var sameProject = actual.project === expected.project;
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var sharedProject = !(options && options.dontShareProject);
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QUnit.push(sharedProject ? sameProject : !sameProject,
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actual.project,
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sharedProject ? expected.project : 'not ' + expected.project,
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message + ' (#project)');
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},
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Path: function(actual, expected, message, options) {
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compareItem(actual, expected, message, options,
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['segments', 'closed', 'clockwise', 'length']);
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},
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CompoundPath: function(actual, expected, message, options) {
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compareItem(actual, expected, message, options);
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},
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Raster: function(actual, expected, message, options) {
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var pixels = options && options.pixels,
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properties = ['size', 'width', 'height', 'resolution'];
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if (!pixels)
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properties.push('source', 'image');
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compareItem(actual, expected, message, options, properties);
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if (pixels) {
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comparePixels(actual, expected, message, options);
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} else {
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equals(actual.toDataURL(), expected.toDataURL(),
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message + ' (#toDataUrl())');
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}
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},
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Shape: function(actual, expected, message, options) {
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compareItem(actual, expected, message, options,
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['shape', 'size', 'radius']);
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},
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PointText: function(actual, expected, message, options) {
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compareItem(actual, expected, message, options,
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['content', 'point']);
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},
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SymbolItem: function(actual, expected, message, options) {
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compareItem(actual, expected, message,
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// Cloning SymbolItems does not result in cloned
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// SymbolDefinitions
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options && options.cloned
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? Base.set({}, options, { cloned: false })
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: options,
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['symbol']);
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},
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SymbolDefinition: function(actual, expected, message, options) {
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equals(actual.definition, expected.definition,
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message + ' (#definition)', options);
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},
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Project: function(actual, expected, message, options) {
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compareProperties(actual, expected, ['layers'], message, options);
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}
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};
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// Some other helpers:
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var getFunctionMessage = function(func) {
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var message = func.toString().match(
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/^\s*function[^\{]*\{([\s\S]*)\}\s*$/)[1]
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.replace(/ /g, '')
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.replace(/^\s+|\s+$/g, '');
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if (/^return /.test(message)) {
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message = message
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.replace(/^return /, '')
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.replace(/;$/, '');
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}
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return message;
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};
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var compareBoolean = function(actual, expected, message, options) {
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expected = typeof expected === 'string'
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? PathItem.create(expected)
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: expected;
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if (typeof actual === 'function') {
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if (!message)
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message = getFunctionMessage(actual);
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actual = actual();
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}
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actual.style = expected.style = {
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strokeColor: 'black',
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fillColor: expected.closed || expected.children ? 'yellow' : null
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};
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equals(actual, expected, message, Base.set({ rasterize: true }, options));
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};
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var createSVG = function(str, attrs) {
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// Similar to SvgElement.create():
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var node = document.createElementNS('http://www.w3.org/2000/svg', str);
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for (var key in attrs)
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node.setAttribute(key, attrs[key]);
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// Paper.js paths do not have a fill by default, SVG does.
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node.setAttribute('fill', 'none');
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return node;
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};
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var compareSVG = function(done, actual, expected, message, options) {
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function getItem(item) {
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return item instanceof Item
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? item
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: typeof item === 'string'
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? new Raster('data:image/svg+xml;base64,' + btoa(item))
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: null;
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}
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actual = getItem(actual);
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expected = getItem(expected);
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actual.position = expected.position;
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if (typeof actual === 'function') {
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if (!message)
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message = getFunctionMessage(actual);
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actual = actual();
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}
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function compare() {
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comparePixels(actual, expected, message, Base.set({
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tolerance: 1e-2,
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resolution: 72
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}, options));
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done();
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}
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if (expected instanceof Raster) {
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expected.onLoad = compare;
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} else if (actual instanceof Raster) {
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actual.onLoad = compare;
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} else {
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compare();
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}
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};
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