fix: ios grapheme layout

.github/workflows/ci.yml

@@ -113,6 +113,10 @@ jobs:
             name: iOS Simulator Safari 14
             targetBrowser: Safari_IOS_14
             xcode: /Applications/Xcode_12_beta.app
+          - os: macos-11
+            name: iOS Simulator Safari 15
+            targetBrowser: Safari_IOS_15
+            xcode: /Applications/Xcode_13.0.app
           - os: windows-latest
             name: Windows Internet Explorer 9 (Emulated)
             targetBrowser: IE_9

CHANGELOG.md

@@ -2,6 +2,86 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [1.3.2](https://github.com/niklasvh/html2canvas/compare/v1.3.1...v1.3.2) (2021-08-15)
+
+
+### docs
+
+* add warning for webgl cloning with preserveDrawingBuffer=false (#2661) ([01ed879](https://github.com/niklasvh/html2canvas/commit/01ed87907ad9c7688880e2c5cb8ebc22ef73a4d8)), closes [#2661](https://github.com/niklasvh/html2canvas/issues/2661)
+* include src files on www (#2660) ([58ff000](https://github.com/niklasvh/html2canvas/commit/58ff0003f77d825ac027eeec95fa80c0123eaf8f)), closes [#2660](https://github.com/niklasvh/html2canvas/issues/2660)
+
+### feat
+
+* add support for data-html2canvas-debug property for debugging (#2658) ([cd0d725](https://github.com/niklasvh/html2canvas/commit/cd0d7258c3a93f2989d5d9ec0244ba2763ea2d23)), closes [#2658](https://github.com/niklasvh/html2canvas/issues/2658)
+
+### fix
+
+* disable transition properties (#2659) ([f143166](https://github.com/niklasvh/html2canvas/commit/f1431665513e0a4636fb167a241f4a0571ba728a)), closes [#2659](https://github.com/niklasvh/html2canvas/issues/2659)
+* overflows with absolutely positioned content (#2663) ([38c6829](https://github.com/niklasvh/html2canvas/commit/38c682955a9299ca7785af71d8f251df799405b0)), closes [#2663](https://github.com/niklasvh/html2canvas/issues/2663)
+
+
+
+## [1.3.1](https://github.com/niklasvh/html2canvas/compare/v1.3.0...v1.3.1) (2021-08-14)
+
+
+### fix
+
+* multi arg transition/animation duration (#2657) ([1b55ed5](https://github.com/niklasvh/html2canvas/commit/1b55ed5668dcbbe1c6d8d7e94736d8f2da2d31c5)), closes [#2657](https://github.com/niklasvh/html2canvas/issues/2657)
+
+
+
+# [1.3.0](https://github.com/niklasvh/html2canvas/compare/v1.2.2...v1.3.0) (2021-08-13)
+
+
+### feat
+
+* add rtl render support (#2653) ([6947982](https://github.com/niklasvh/html2canvas/commit/694798284838b16882e648914da0905818aa366c)), closes [#2653](https://github.com/niklasvh/html2canvas/issues/2653)
+* correctly break graphemes (#2652) ([437b367](https://github.com/niklasvh/html2canvas/commit/437b367d3ba9dfd7f9a4c8042ac8d00208c09770)), closes [#2652](https://github.com/niklasvh/html2canvas/issues/2652)
+
+### fix
+
+* correctly handle allowTaint canvas cloning (#2649) ([c378e22](https://github.com/niklasvh/html2canvas/commit/c378e220694c14cb7b3b4b8650a7757f8fc23c7a)), closes [#2649](https://github.com/niklasvh/html2canvas/issues/2649)
+* finish animation/transitions for elements (#2632) ([969638f](https://github.com/niklasvh/html2canvas/commit/969638fb94a0a14c64a667fa6e5689f79d9f1044)), closes [#2632](https://github.com/niklasvh/html2canvas/issues/2632)
+
+### test
+
+* add letter-spacing test for zwj emoji (#2650) ([f919204](https://github.com/niklasvh/html2canvas/commit/f919204efa06af219f155ca279f96124bb92862b)), closes [#2650](https://github.com/niklasvh/html2canvas/issues/2650)
+
+
+
+## [1.2.2](https://github.com/niklasvh/html2canvas/compare/v1.2.1...v1.2.2) (2021-08-10)
+
+
+### ci
+
+* add ios15 target (#2564) ([e429e04](https://github.com/niklasvh/html2canvas/commit/e429e0443adf5c7ca3041b97a8157b8911302206)), closes [#2564](https://github.com/niklasvh/html2canvas/issues/2564)
+
+### docs
+
+* update test previewer (#2637) ([7a06d0c](https://github.com/niklasvh/html2canvas/commit/7a06d0c2c2f3b8a1d1a8a85c540f8288b782e8c6)), closes [#2637](https://github.com/niklasvh/html2canvas/issues/2637)
+
+### fix
+
+* parsing counter content in pseudo element (#2640) ([1941b9e](https://github.com/niklasvh/html2canvas/commit/1941b9e0acfd9243da0beaf70e1643cab1b4a963)), closes [#2640](https://github.com/niklasvh/html2canvas/issues/2640)
+* radial gradient ry check (#2631) ([a0dd38a](https://github.com/niklasvh/html2canvas/commit/a0dd38a8be4e540ae1c1f4b4e41f6c386f3e454f)), closes [#2631](https://github.com/niklasvh/html2canvas/issues/2631)
+* test for ios range line break error (#2635) ([f43f942](https://github.com/niklasvh/html2canvas/commit/f43f942fcd793dde9cdc6c0438f379ec3c05c405)), closes [#2635](https://github.com/niklasvh/html2canvas/issues/2635)
+
+### test
+
+* large base64 encoded background (#2636) ([e36408a](https://github.com/niklasvh/html2canvas/commit/e36408ad030fe31acd9969a37fe24c1621c0bd04)), closes [#2636](https://github.com/niklasvh/html2canvas/issues/2636)
+
+
+
+## [1.2.1](https://github.com/niklasvh/html2canvas/compare/v1.2.0...v1.2.1) (2021-08-05)
+
+
+### fix
+
+* none image (#2627) ([6651fc6](https://github.com/niklasvh/html2canvas/commit/6651fc6789d5902d171dc53b4094887870433018)), closes [#2627](https://github.com/niklasvh/html2canvas/issues/2627)
+* type import that is only available ts 3.8 or higher (#2629) ([c5c6fa0](https://github.com/niklasvh/html2canvas/commit/c5c6fa00d71f36ef963ba5170ebc7b668d39c407)), closes [#2629](https://github.com/niklasvh/html2canvas/issues/2629)
+
+
+
 # [1.2.0](https://github.com/niklasvh/html2canvas/compare/v1.1.5...v1.2.0) (2021-08-04)
 
 

karma.conf.js

@@ -42,6 +42,12 @@ module.exports = function(config) {
             platform: 'iOS',
             sdk: '14.0'
         },
+        Safari_IOS_15: {
+            base: 'MobileSafari',
+            name: 'iPhone 8',
+            platform: 'iOS',
+            sdk: '15.0'
+        },
         SauceLabs_IE9: {
             base: 'SauceLabs',
             browserName: 'internet explorer',

package.json

@@ -6,7 +6,7 @@
   "module": "dist/html2canvas.esm.js",
   "typings": "dist/types/index.d.ts",
   "browser": "dist/html2canvas.js",
-  "version": "1.2.0",
+  "version": "1.3.2",
   "author": {
     "name": "Niklas von Hertzen",
     "email": "niklasvh@gmail.com",
@@ -48,7 +48,7 @@
     "babel-loader": "^8.0.5",
     "babel-plugin-add-module-exports": "^1.0.2",
     "babel-plugin-dev-expression": "^0.2.1",
-    "base64-arraybuffer": "0.2.0",
+    "base64-arraybuffer": "1.0.1",
     "body-parser": "^1.19.0",
     "chai": "4.1.1",
     "chromeless": "^1.5.2",
@@ -118,6 +118,7 @@
   "homepage": "https://html2canvas.hertzen.com",
   "license": "MIT",
   "dependencies": {
-    "css-line-break": "2.0.1"
+    "css-line-break": "2.0.1",
+    "text-segmentation": "^1.0.2"
   }
 }

src/core/cache-storage.ts

@@ -1,5 +1,5 @@
 import {FEATURES} from './features';
-import type {Context} from './context';
+import {Context} from './context';
 
 export class CacheStorage {
     private static _link?: HTMLAnchorElement;

src/core/debugger.ts

@@ -0,0 +1,29 @@
+const elementDebuggerAttribute = 'data-html2canvas-debug';
+export const enum DebuggerType {
+    NONE,
+    ALL,
+    CLONE,
+    PARSE,
+    RENDER
+}
+
+const getElementDebugType = (element: Element): DebuggerType => {
+    const attribute = element.getAttribute(elementDebuggerAttribute);
+    switch (attribute) {
+        case 'all':
+            return DebuggerType.ALL;
+        case 'clone':
+            return DebuggerType.CLONE;
+        case 'parse':
+            return DebuggerType.PARSE;
+        case 'render':
+            return DebuggerType.RENDER;
+        default:
+            return DebuggerType.NONE;
+    }
+};
+
+export const isDebugging = (element: Element, type: Omit<DebuggerType, DebuggerType.NONE>): boolean => {
+    const elementType = getElementDebugType(element);
+    return elementType === DebuggerType.ALL || type === elementType;
+};

src/core/features.ts

@@ -1,3 +1,5 @@
+import {fromCodePoint, toCodePoints} from 'css-line-break';
+
 const testRangeBounds = (document: Document) => {
     const TEST_HEIGHT = 123;
 
@@ -22,6 +24,45 @@ const testRangeBounds = (document: Document) => {
     return false;
 };
 
+const testIOSLineBreak = (document: Document) => {
+    const testElement = document.createElement('boundtest');
+    testElement.style.width = '50px';
+    testElement.style.display = 'block';
+    testElement.style.fontSize = '12px';
+    testElement.style.letterSpacing = '0px';
+    testElement.style.wordSpacing = '0px';
+    document.body.appendChild(testElement);
+    const range = document.createRange();
+
+    testElement.innerHTML = typeof ''.repeat === 'function' ? '👨'.repeat(10) : '';
+
+    const node = testElement.firstChild as Text;
+
+    const textList = toCodePoints(node.data).map((i) => fromCodePoint(i));
+    let offset = 0;
+    let prev: DOMRect = {} as DOMRect;
+
+    // ios 13 does not handle range getBoundingClientRect line changes correctly #2177
+    const supports = textList.every((text, i) => {
+        range.setStart(node, offset);
+        range.setEnd(node, offset + text.length);
+        const rect = range.getBoundingClientRect();
+
+        offset += text.length;
+        const boundAhead = rect.x > prev.x || rect.y > prev.y;
+
+        prev = rect;
+        if (i === 0) {
+            return true;
+        }
+
+        return boundAhead;
+    });
+
+    document.body.removeChild(testElement);
+    return supports;
+};
+
 const testCORS = (): boolean => typeof new Image().crossOrigin !== 'undefined';
 
 const testResponseType = (): boolean => typeof new XMLHttpRequest().responseType === 'string';
@@ -132,6 +173,12 @@ export const FEATURES = {
         Object.defineProperty(FEATURES, 'SUPPORT_RANGE_BOUNDS', {value});
         return value;
     },
+    get SUPPORT_WORD_BREAKING(): boolean {
+        'use strict';
+        const value = FEATURES.SUPPORT_RANGE_BOUNDS && testIOSLineBreak(document);
+        Object.defineProperty(FEATURES, 'SUPPORT_WORD_BREAKING', {value});
+        return value;
+    },
     get SUPPORT_SVG_DRAWING(): boolean {
         'use strict';
         const value = testSVG(document);

src/css/IPropertyDescriptor.ts

@@ -1,8 +1,8 @@
 import {CSSValue} from './syntax/parser';
-import {CSSTypes} from './types/index';
+import {CSSTypes} from './types';
 import {Context} from '../core/context';
 
-export enum PropertyDescriptorParsingType {
+export const enum PropertyDescriptorParsingType {
     VALUE,
     LIST,
     IDENT_VALUE,

src/css/index.ts

@@ -31,6 +31,7 @@ import {
     borderTopWidth
 } from './property-descriptors/border-width';
 import {color} from './property-descriptors/color';
+import {direction} from './property-descriptors/direction';
 import {display, DISPLAY} from './property-descriptors/display';
 import {float, FLOAT} from './property-descriptors/float';
 import {letterSpacing} from './property-descriptors/letter-spacing';
@@ -57,6 +58,7 @@ import {Tokenizer} from './syntax/tokenizer';
 import {Color, color as colorType, isTransparent} from './types/color';
 import {angle} from './types/angle';
 import {image} from './types/image';
+import {time} from './types/time';
 import {opacity} from './property-descriptors/opacity';
 import {textDecorationColor} from './property-descriptors/text-decoration-color';
 import {textDecorationLine} from './property-descriptors/text-decoration-line';
@@ -71,6 +73,7 @@ import {contains} from '../core/bitwise';
 import {content} from './property-descriptors/content';
 import {counterIncrement} from './property-descriptors/counter-increment';
 import {counterReset} from './property-descriptors/counter-reset';
+import {duration} from './property-descriptors/duration';
 import {quotes} from './property-descriptors/quotes';
 import {boxShadow} from './property-descriptors/box-shadow';
 import {paintOrder} from './property-descriptors/paint-order';
@@ -79,6 +82,7 @@ import {webkitTextStrokeWidth} from './property-descriptors/webkit-text-stroke-w
 import {Context} from '../core/context';
 
 export class CSSParsedDeclaration {
+    animationDuration: ReturnType<typeof duration.parse>;
     backgroundClip: ReturnType<typeof backgroundClip.parse>;
     backgroundColor: Color;
     backgroundImage: ReturnType<typeof backgroundImage.parse>;
@@ -104,6 +108,7 @@ export class CSSParsedDeclaration {
     borderLeftWidth: ReturnType<typeof borderLeftWidth.parse>;
     boxShadow: ReturnType<typeof boxShadow.parse>;
     color: Color;
+    direction: ReturnType<typeof direction.parse>;
     display: ReturnType<typeof display.parse>;
     float: ReturnType<typeof float.parse>;
     fontFamily: ReturnType<typeof fontFamily.parse>;
@@ -145,6 +150,7 @@ export class CSSParsedDeclaration {
     zIndex: ReturnType<typeof zIndex.parse>;
 
     constructor(context: Context, declaration: CSSStyleDeclaration) {
+        this.animationDuration = parse(context, duration, declaration.animationDuration);
         this.backgroundClip = parse(context, backgroundClip, declaration.backgroundClip);
         this.backgroundColor = parse(context, backgroundColor, declaration.backgroundColor);
         this.backgroundImage = parse(context, backgroundImage, declaration.backgroundImage);
@@ -170,6 +176,7 @@ export class CSSParsedDeclaration {
         this.borderLeftWidth = parse(context, borderLeftWidth, declaration.borderLeftWidth);
         this.boxShadow = parse(context, boxShadow, declaration.boxShadow);
         this.color = parse(context, color, declaration.color);
+        this.direction = parse(context, direction, declaration.direction);
         this.display = parse(context, display, declaration.display);
         this.float = parse(context, float, declaration.cssFloat);
         this.fontFamily = parse(context, fontFamily, declaration.fontFamily);
@@ -306,6 +313,8 @@ const parse = (context: Context, descriptor: CSSPropertyDescriptor<any>, style?:
                 case 'length-percentage':
                     const value = parser.parseComponentValue();
                     return isLengthPercentage(value) ? value : ZERO_LENGTH;
+                case 'time':
+                    return time.parse(context, parser.parseComponentValue());
             }
             break;
     }

src/css/layout/bounds.ts

@@ -15,6 +15,20 @@ export class Bounds {
             clientRect.height
         );
     }
+
+    static fromDOMRectList(context: Context, domRectList: DOMRectList): Bounds {
+        const domRect = domRectList[0];
+        return domRect
+            ? new Bounds(
+                  domRect.x + context.windowBounds.left,
+                  domRect.y + context.windowBounds.top,
+                  domRect.width,
+                  domRect.height
+              )
+            : Bounds.EMPTY;
+    }
+
+    static EMPTY = new Bounds(0, 0, 0, 0);
 }
 
 export const parseBounds = (context: Context, node: Element): Bounds => {

src/css/layout/text.ts

@@ -1,6 +1,7 @@
 import {OVERFLOW_WRAP} from '../property-descriptors/overflow-wrap';
 import {CSSParsedDeclaration} from '../index';
 import {fromCodePoint, LineBreaker, toCodePoints} from 'css-line-break';
+import {splitGraphemes} from 'text-segmentation';
 import {Bounds, parseBounds} from './bounds';
 import {FEATURES} from '../../core/features';
 import {Context} from '../../core/context';
@@ -27,7 +28,28 @@ export const parseTextBounds = (
     textList.forEach((text) => {
         if (styles.textDecorationLine.length || text.trim().length > 0) {
             if (FEATURES.SUPPORT_RANGE_BOUNDS) {
-                textBounds.push(new TextBounds(text, getRangeBounds(context, node, offset, text.length)));
+                if (!FEATURES.SUPPORT_WORD_BREAKING) {
+                    const rects = createRange(node, offset, text.length).getClientRects();
+                    if (rects.length > 1) {
+                        let graphemeOffset = 0;
+                        splitGraphemes(text).forEach((grapheme) => {
+                            textBounds.push(
+                                new TextBounds(
+                                    grapheme,
+                                    Bounds.fromDOMRectList(
+                                        context,
+                                        createRange(node, graphemeOffset + offset, grapheme.length).getClientRects()
+                                    )
+                                )
+                            );
+                            graphemeOffset += grapheme.length;
+                        });
+                    } else {
+                        textBounds.push(new TextBounds(text, Bounds.fromDOMRectList(context, rects)));
+                    }
+                } else {
+                    textBounds.push(new TextBounds(text, getRangeBounds(context, node, offset, text.length)));
+                }
             } else {
                 const replacementNode = node.splitText(text.length);
                 textBounds.push(new TextBounds(text, getWrapperBounds(context, node)));
@@ -58,10 +80,10 @@ const getWrapperBounds = (context: Context, node: Text): Bounds => {
         }
     }
 
-    return new Bounds(0, 0, 0, 0);
+    return Bounds.EMPTY;
 };
 
-const getRangeBounds = (context: Context, node: Text, offset: number, length: number): Bounds => {
+const createRange = (node: Text, offset: number, length: number): Range => {
     const ownerDocument = node.ownerDocument;
     if (!ownerDocument) {
         throw new Error('Node has no owner document');
@@ -69,11 +91,15 @@ const getRangeBounds = (context: Context, node: Text, offset: number, length: nu
     const range = ownerDocument.createRange();
     range.setStart(node, offset);
     range.setEnd(node, offset + length);
-    return Bounds.fromClientRect(context, range.getBoundingClientRect());
+    return range;
+};
+
+const getRangeBounds = (context: Context, node: Text, offset: number, length: number): Bounds => {
+    return Bounds.fromClientRect(context, createRange(node, offset, length).getBoundingClientRect());
 };
 
 const breakText = (value: string, styles: CSSParsedDeclaration): string[] => {
-    return styles.letterSpacing !== 0 ? toCodePoints(value).map((i) => fromCodePoint(i)) : breakWords(value, styles);
+    return styles.letterSpacing !== 0 ? splitGraphemes(value) : breakWords(value, styles);
 };
 
 // https://drafts.csswg.org/css-text/#word-separator

src/css/property-descriptors/direction.ts

@@ -0,0 +1,23 @@
+import {IPropertyIdentValueDescriptor, PropertyDescriptorParsingType} from '../IPropertyDescriptor';
+import {Context} from '../../core/context';
+
+export const enum DIRECTION {
+    LTR = 0,
+    RTL = 1
+}
+
+export const direction: IPropertyIdentValueDescriptor<DIRECTION> = {
+    name: 'direction',
+    initialValue: 'ltr',
+    prefix: false,
+    type: PropertyDescriptorParsingType.IDENT_VALUE,
+    parse: (_context: Context, direction: string) => {
+        switch (direction) {
+            case 'rtl':
+                return DIRECTION.RTL;
+            case 'ltr':
+            default:
+                return DIRECTION.LTR;
+        }
+    }
+};

src/css/property-descriptors/duration.ts

@@ -0,0 +1,14 @@
+import {IPropertyListDescriptor, PropertyDescriptorParsingType} from '../IPropertyDescriptor';
+import {Context} from '../../core/context';
+import {CSSValue, isDimensionToken} from '../syntax/parser';
+import {time} from '../types/time';
+
+export const duration: IPropertyListDescriptor<number[]> = {
+    name: 'duration',
+    initialValue: '0s',
+    prefix: false,
+    type: PropertyDescriptorParsingType.LIST,
+    parse: (context: Context, tokens: CSSValue[]) => {
+        return tokens.filter(isDimensionToken).map((token) => time.parse(context, token));
+    }
+};

src/css/property-descriptors/overflow-wrap.ts

@@ -1,6 +1,6 @@
 import {IPropertyIdentValueDescriptor, PropertyDescriptorParsingType} from '../IPropertyDescriptor';
 import {Context} from '../../core/context';
-export enum OVERFLOW_WRAP {
+export const enum OVERFLOW_WRAP {
     NORMAL = 'normal',
     BREAK_WORD = 'break-word'
 }

src/css/property-descriptors/overflow.ts

@@ -5,7 +5,8 @@ export enum OVERFLOW {
     VISIBLE = 0,
     HIDDEN = 1,
     SCROLL = 2,
-    AUTO = 3
+    CLIP = 3,
+    AUTO = 4
 }
 
 export const overflow: IPropertyListDescriptor<OVERFLOW[]> = {
@@ -20,6 +21,8 @@ export const overflow: IPropertyListDescriptor<OVERFLOW[]> = {
                     return OVERFLOW.HIDDEN;
                 case 'scroll':
                     return OVERFLOW.SCROLL;
+                case 'clip':
+                    return OVERFLOW.CLIP;
                 case 'auto':
                     return OVERFLOW.AUTO;
                 case 'visible':

src/css/syntax/tokenizer.ts

@@ -2,7 +2,7 @@
 
 import {fromCodePoint, toCodePoints} from 'css-line-break';
 
-export enum TokenType {
+export const enum TokenType {
     STRING_TOKEN,
     BAD_STRING_TOKEN,
     LEFT_PARENTHESIS_TOKEN,

src/css/types/functions/counter.ts

@@ -4,10 +4,7 @@ import {contains} from '../../../core/bitwise';
 import {CSSParsedCounterDeclaration} from '../../index';
 
 export class CounterState {
-    readonly counters: {[key: string]: number[]};
+    private readonly counters: {[key: string]: number[]} = {};
-    constructor() {
-        this.counters = {};
-    }
 
     getCounterValue(name: string): number {
         const counter = this.counters[name];
@@ -18,7 +15,7 @@ export class CounterState {
         return 1;
     }
 
-    getCounterValues(name: string): number[] {
+    getCounterValues(name: string): readonly number[] {
         const counter = this.counters[name];
         return counter ? counter : [];
     }
@@ -37,6 +34,9 @@ export class CounterState {
                 const counter = this.counters[entry.counter];
                 if (counter && entry.increment !== 0) {
                     canReset = false;
+                    if (!counter.length) {
+                        counter.push(1);
+                    }
                     counter[Math.max(0, counter.length - 1)] += entry.increment;
                 }
             });

src/css/types/image.ts

@@ -94,12 +94,15 @@ export const image: ITypeDescriptor<ICSSImage> = {
             return imageFunction(context, value.values);
         }
 
-        throw new Error(`Unsupported image type`);
+        throw new Error(`Unsupported image type ${value.type}`);
     }
 };
 
 export function isSupportedImage(value: CSSValue): boolean {
-    return value.type !== TokenType.FUNCTION || !!SUPPORTED_IMAGE_FUNCTIONS[value.name];
+    return (
+        !(value.type === TokenType.IDENT_TOKEN && value.value === 'none') &&
+        (value.type !== TokenType.FUNCTION || !!SUPPORTED_IMAGE_FUNCTIONS[value.name])
+    );
 }
 
 const SUPPORTED_IMAGE_FUNCTIONS: Record<string, (context: Context, args: CSSValue[]) => ICSSImage> = {

src/css/types/index.ts

@@ -1 +1 @@
-export type CSSTypes = 'angle' | 'color' | 'image' | 'length' | 'length-percentage';
+export type CSSTypes = 'angle' | 'color' | 'image' | 'length' | 'length-percentage' | 'time';

src/css/types/time.ts

@@ -0,0 +1,20 @@
+import {CSSValue} from '../syntax/parser';
+import {TokenType} from '../syntax/tokenizer';
+import {ITypeDescriptor} from '../ITypeDescriptor';
+import {Context} from '../../core/context';
+
+export const time: ITypeDescriptor<number> = {
+    name: 'time',
+    parse: (_context: Context, value: CSSValue): number => {
+        if (value.type === TokenType.DIMENSION_TOKEN) {
+            switch (value.unit.toLowerCase()) {
+                case 's':
+                    return 1000 * value.number;
+                case 'ms':
+                    return value.number;
+            }
+        }
+
+        throw new Error(`Unsupported time type`);
+    }
+};

src/dom/document-cloner.ts

@@ -20,10 +20,12 @@ import {LIST_STYLE_TYPE, listStyleType} from '../css/property-descriptors/list-s
 import {CSSParsedCounterDeclaration, CSSParsedPseudoDeclaration} from '../css/index';
 import {getQuote} from '../css/property-descriptors/quotes';
 import {Context} from '../core/context';
+import {DebuggerType, isDebugging} from '../core/debugger';
 
 export interface CloneOptions {
     ignoreElements?: (element: Element) => boolean;
     onclone?: (document: Document, element: HTMLElement) => void;
+    allowTaint?: boolean;
 }
 
 export interface WindowOptions {
@@ -135,6 +137,9 @@ export class DocumentCloner {
     }
 
     createElementClone<T extends HTMLElement | SVGElement>(node: T): HTMLElement | SVGElement {
+        if (isDebugging(node, DebuggerType.CLONE)) {
+            debugger;
+        }
         if (isCanvasElement(node)) {
             return this.createCanvasClone(node);
         }
@@ -189,7 +194,7 @@ export class DocumentCloner {
                 img.src = canvas.toDataURL();
                 return img;
             } catch (e) {
-                this.context.logger.info(`Unable to clone canvas contents, canvas is tainted`);
+                this.context.logger.info(`Unable to inline canvas contents, canvas is tainted`, canvas);
             }
         }
 
@@ -201,14 +206,27 @@ export class DocumentCloner {
             const ctx = canvas.getContext('2d');
             const clonedCtx = clonedCanvas.getContext('2d');
             if (clonedCtx) {
-                if (ctx) {
+                if (!this.options.allowTaint && ctx) {
                     clonedCtx.putImageData(ctx.getImageData(0, 0, canvas.width, canvas.height), 0, 0);
                 } else {
+                    const gl = canvas.getContext('webgl2') ?? canvas.getContext('webgl');
+                    if (gl) {
+                        const attribs = gl.getContextAttributes();
+                        if (attribs?.preserveDrawingBuffer === false) {
+                            this.context.logger.warn(
+                                'Unable to clone WebGL context as it has preserveDrawingBuffer=false',
+                                canvas
+                            );
+                        }
+                    }
+
                     clonedCtx.drawImage(canvas, 0, 0);
                 }
             }
             return clonedCanvas;
-        } catch (e) {}
+        } catch (e) {
+            this.context.logger.info(`Unable to clone canvas as it is tainted`, canvas);
+        }
 
         return clonedCanvas;
     }
@@ -226,6 +244,7 @@ export class DocumentCloner {
 
         if (window && isElementNode(node) && (isHTMLElementNode(node) || isSVGElementNode(node))) {
             const clone = this.createElementClone(node);
+            clone.style.transitionProperty = 'none';
 
             const style = window.getComputedStyle(node);
             const styleBefore = window.getComputedStyle(node, ':before');

src/dom/element-container.ts

@@ -3,29 +3,44 @@ import {TextContainer} from './text-container';
 import {Bounds, parseBounds} from '../css/layout/bounds';
 import {isHTMLElementNode} from './node-parser';
 import {Context} from '../core/context';
+import {DebuggerType, isDebugging} from '../core/debugger';
 
 export const enum FLAGS {
     CREATES_STACKING_CONTEXT = 1 << 1,
     CREATES_REAL_STACKING_CONTEXT = 1 << 2,
-    IS_LIST_OWNER = 1 << 3
+    IS_LIST_OWNER = 1 << 3,
+    DEBUG_RENDER = 1 << 4
 }
 
 export class ElementContainer {
     readonly styles: CSSParsedDeclaration;
-    readonly textNodes: TextContainer[];
+    readonly textNodes: TextContainer[] = [];
-    readonly elements: ElementContainer[];
+    readonly elements: ElementContainer[] = [];
     bounds: Bounds;
-    flags: number;
+    flags = 0;
 
     constructor(protected readonly context: Context, element: Element) {
-        this.styles = new CSSParsedDeclaration(context, window.getComputedStyle(element, null));
+        if (isDebugging(element, DebuggerType.PARSE)) {
-        this.textNodes = [];
+            debugger;
-        this.elements = [];
-        if (this.styles.transform !== null && isHTMLElementNode(element)) {
-            // getBoundingClientRect takes transforms into account
-            element.style.transform = 'none';
         }
+
+        this.styles = new CSSParsedDeclaration(context, window.getComputedStyle(element, null));
+
+        if (isHTMLElementNode(element)) {
+            if (this.styles.animationDuration.some((duration) => duration > 0)) {
+                element.style.animationDuration = '0s';
+            }
+
+            if (this.styles.transform !== null) {
+                // getBoundingClientRect takes transforms into account
+                element.style.transform = 'none';
+            }
+        }
+
         this.bounds = parseBounds(this.context, element);
-        this.flags = 0;
+
+        if (isDebugging(element, DebuggerType.RENDER)) {
+            this.flags |= FLAGS.DEBUG_RENDER;
+        }
     }
 }

src/index.ts

@@ -74,6 +74,7 @@ const renderElement = async (element: HTMLElement, opts: Partial<Options>): Prom
     const foreignObjectRendering = opts.foreignObjectRendering ?? false;
 
     const cloneOptions: CloneConfigurations = {
+        allowTaint: opts.allowTaint ?? false,
         onclone: opts.onclone,
         ignoreElements: opts.ignoreElements,
         inlineImages: foreignObjectRendering,

src/render/canvas/canvas-renderer.ts

@@ -1,6 +1,6 @@
 import {ElementPaint, parseStackingContexts, StackingContext} from '../stacking-context';
 import {asString, Color, isTransparent} from '../../css/types/color';
-import {ElementContainer} from '../../dom/element-container';
+import {ElementContainer, FLAGS} from '../../dom/element-container';
 import {BORDER_STYLE} from '../../css/property-descriptors/border-style';
 import {CSSParsedDeclaration} from '../../css/index';
 import {TextContainer} from '../../dom/text-container';
@@ -19,7 +19,6 @@ import {
 import {calculateBackgroundRendering, getBackgroundValueForIndex} from '../background';
 import {isDimensionToken} from '../../css/syntax/parser';
 import {TextBounds} from '../../css/layout/text';
-import {fromCodePoint, toCodePoints} from 'css-line-break';
 import {ImageElementContainer} from '../../dom/replaced-elements/image-element-container';
 import {contentBox} from '../box-sizing';
 import {CanvasElementContainer} from '../../dom/replaced-elements/canvas-element-container';
@@ -44,6 +43,8 @@ import {TextShadow} from '../../css/property-descriptors/text-shadow';
 import {PAINT_ORDER_LAYER} from '../../css/property-descriptors/paint-order';
 import {Renderer} from '../renderer';
 import {Context} from '../../core/context';
+import {DIRECTION} from '../../css/property-descriptors/direction';
+import {splitGraphemes} from 'text-segmentation';
 
 export type RenderConfigurations = RenderOptions & {
     backgroundColor: Color | null;
@@ -86,12 +87,12 @@ export class CanvasRenderer extends Renderer {
         );
     }
 
-    applyEffects(effects: IElementEffect[], target: EffectTarget): void {
+    applyEffects(effects: IElementEffect[]): void {
         while (this._activeEffects.length) {
             this.popEffect();
         }
 
-        effects.filter((effect) => contains(effect.target, target)).forEach((effect) => this.applyEffect(effect));
+        effects.forEach((effect) => this.applyEffect(effect));
     }
 
     applyEffect(effect: IElementEffect): void {
@@ -134,6 +135,10 @@ export class CanvasRenderer extends Renderer {
     }
 
     async renderNode(paint: ElementPaint): Promise<void> {
+        if (contains(paint.container.flags, FLAGS.DEBUG_RENDER)) {
+            debugger;
+        }
+
         if (paint.container.styles.isVisible()) {
             await this.renderNodeBackgroundAndBorders(paint);
             await this.renderNodeContent(paint);
@@ -144,7 +149,7 @@ export class CanvasRenderer extends Renderer {
         if (letterSpacing === 0) {
             this.ctx.fillText(text.text, text.bounds.left, text.bounds.top + baseline);
         } else {
-            const letters = toCodePoints(text.text).map((i) => fromCodePoint(i));
+            const letters = splitGraphemes(text.text);
             letters.reduce((left, letter) => {
                 this.ctx.fillText(letter, left, text.bounds.top + baseline);
 
@@ -174,6 +179,8 @@ export class CanvasRenderer extends Renderer {
 
         this.ctx.font = font;
 
+        this.ctx.direction = styles.direction === DIRECTION.RTL ? 'rtl' : 'ltr';
+        this.ctx.textAlign = 'left';
         this.ctx.textBaseline = 'alphabetic';
         const {baseline, middle} = this.fontMetrics.getMetrics(fontFamily, fontSize);
         const paintOrder = styles.paintOrder;
@@ -286,7 +293,7 @@ export class CanvasRenderer extends Renderer {
     }
 
     async renderNodeContent(paint: ElementPaint): Promise<void> {
-        this.applyEffects(paint.effects, EffectTarget.CONTENT);
+        this.applyEffects(paint.getEffects(EffectTarget.CONTENT));
         const container = paint.container;
         const curves = paint.curves;
         const styles = container.styles;
@@ -465,6 +472,9 @@ export class CanvasRenderer extends Renderer {
     }
 
     async renderStackContent(stack: StackingContext): Promise<void> {
+        if (contains(stack.element.container.flags, FLAGS.DEBUG_RENDER)) {
+            debugger;
+        }
         // https://www.w3.org/TR/css-position-3/#painting-order
         // 1. the background and borders of the element forming the stacking context.
         await this.renderNodeBackgroundAndBorders(stack.element);
@@ -628,7 +638,7 @@ export class CanvasRenderer extends Renderer {
                 const y = getAbsoluteValue(position[position.length - 1], height);
 
                 const [rx, ry] = calculateRadius(backgroundImage, x, y, width, height);
-                if (rx > 0 && rx > 0) {
+                if (rx > 0 && ry > 0) {
                     const radialGradient = this.ctx.createRadialGradient(left + x, top + y, 0, left + x, top + y, rx);
 
                     processColorStops(backgroundImage.stops, rx * 2).forEach((colorStop) =>
@@ -682,7 +692,7 @@ export class CanvasRenderer extends Renderer {
     }
 
     async renderNodeBackgroundAndBorders(paint: ElementPaint): Promise<void> {
-        this.applyEffects(paint.effects, EffectTarget.BACKGROUND_BORDERS);
+        this.applyEffects(paint.getEffects(EffectTarget.BACKGROUND_BORDERS));
         const styles = paint.container.styles;
         const hasBackground = !isTransparent(styles.backgroundColor) || styles.backgroundImage.length;
 
@@ -896,7 +906,7 @@ export class CanvasRenderer extends Renderer {
         const stack = parseStackingContexts(element);
 
         await this.renderStack(stack);
-        this.applyEffects([], EffectTarget.BACKGROUND_BORDERS);
+        this.applyEffects([]);
         return this.canvas;
     }
 }

src/render/effects.ts

@@ -20,36 +20,21 @@ export interface IElementEffect {
 export class TransformEffect implements IElementEffect {
     readonly type: EffectType = EffectType.TRANSFORM;
     readonly target: number = EffectTarget.BACKGROUND_BORDERS | EffectTarget.CONTENT;
-    readonly offsetX: number;
-    readonly offsetY: number;
-    readonly matrix: Matrix;
 
-    constructor(offsetX: number, offsetY: number, matrix: Matrix) {
+    constructor(readonly offsetX: number, readonly offsetY: number, readonly matrix: Matrix) {}
-        this.offsetX = offsetX;
-        this.offsetY = offsetY;
-        this.matrix = matrix;
-    }
 }
 
 export class ClipEffect implements IElementEffect {
     readonly type: EffectType = EffectType.CLIP;
-    readonly target: number;
-    readonly path: Path[];
 
-    constructor(path: Path[], target: EffectTarget) {
+    constructor(readonly path: Path[], readonly target: EffectTarget) {}
-        this.target = target;
-        this.path = path;
-    }
 }
 
 export class OpacityEffect implements IElementEffect {
     readonly type: EffectType = EffectType.OPACITY;
     readonly target: number = EffectTarget.BACKGROUND_BORDERS | EffectTarget.CONTENT;
-    readonly opacity: number;
 
-    constructor(opacity: number) {
+    constructor(readonly opacity: number) {}
-        this.opacity = opacity;
-    }
 }
 
 export const isTransformEffect = (effect: IElementEffect): effect is TransformEffect =>

src/render/stacking-context.ts

@@ -1,13 +1,14 @@
 import {ElementContainer, FLAGS} from '../dom/element-container';
 import {contains} from '../core/bitwise';
 import {BoundCurves, calculateBorderBoxPath, calculatePaddingBoxPath} from './bound-curves';
-import {ClipEffect, EffectTarget, IElementEffect, OpacityEffect, TransformEffect} from './effects';
+import {ClipEffect, EffectTarget, IElementEffect, isClipEffect, OpacityEffect, TransformEffect} from './effects';
 import {OVERFLOW} from '../css/property-descriptors/overflow';
 import {equalPath} from './path';
 import {DISPLAY} from '../css/property-descriptors/display';
 import {OLElementContainer} from '../dom/elements/ol-element-container';
 import {LIElementContainer} from '../dom/elements/li-element-container';
 import {createCounterText} from '../css/types/functions/counter';
+import {POSITION} from '../css/property-descriptors/position';
 
 export class StackingContext {
     element: ElementPaint;
@@ -32,27 +33,24 @@ export class StackingContext {
 }
 
 export class ElementPaint {
-    container: ElementContainer;
+    readonly effects: IElementEffect[] = [];
-    effects: IElementEffect[];
+    readonly curves: BoundCurves;
-    curves: BoundCurves;
     listValue?: string;
 
-    constructor(element: ElementContainer, parentStack: IElementEffect[]) {
+    constructor(readonly container: ElementContainer, readonly parent: ElementPaint | null) {
-        this.container = element;
+        this.curves = new BoundCurves(this.container);
-        this.effects = parentStack.slice(0);
+        if (this.container.styles.opacity < 1) {
-        this.curves = new BoundCurves(element);
+            this.effects.push(new OpacityEffect(this.container.styles.opacity));
-        if (element.styles.opacity < 1) {
-            this.effects.push(new OpacityEffect(element.styles.opacity));
         }
 
-        if (element.styles.transform !== null) {
+        if (this.container.styles.transform !== null) {
-            const offsetX = element.bounds.left + element.styles.transformOrigin[0].number;
+            const offsetX = this.container.bounds.left + this.container.styles.transformOrigin[0].number;
-            const offsetY = element.bounds.top + element.styles.transformOrigin[1].number;
+            const offsetY = this.container.bounds.top + this.container.styles.transformOrigin[1].number;
-            const matrix = element.styles.transform;
+            const matrix = this.container.styles.transform;
             this.effects.push(new TransformEffect(offsetX, offsetY, matrix));
         }
 
-        if (element.styles.overflowX !== OVERFLOW.VISIBLE) {
+        if (this.container.styles.overflowX !== OVERFLOW.VISIBLE) {
             const borderBox = calculateBorderBoxPath(this.curves);
             const paddingBox = calculatePaddingBoxPath(this.curves);
 
@@ -65,16 +63,32 @@ export class ElementPaint {
         }
     }
 
-    getParentEffects(): IElementEffect[] {
+    getEffects(target: EffectTarget): IElementEffect[] {
+        let inFlow = [POSITION.ABSOLUTE, POSITION.FIXED].indexOf(this.container.styles.position) === -1;
+        let parent = this.parent;
         const effects = this.effects.slice(0);
-        if (this.container.styles.overflowX !== OVERFLOW.VISIBLE) {
+        while (parent) {
-            const borderBox = calculateBorderBoxPath(this.curves);
+            const croplessEffects = parent.effects.filter((effect) => !isClipEffect(effect));
-            const paddingBox = calculatePaddingBoxPath(this.curves);
+            if (inFlow || parent.container.styles.position !== POSITION.STATIC || !parent.parent) {
-            if (!equalPath(borderBox, paddingBox)) {
+                effects.unshift(...croplessEffects);
-                effects.push(new ClipEffect(paddingBox, EffectTarget.BACKGROUND_BORDERS | EffectTarget.CONTENT));
+                inFlow = [POSITION.ABSOLUTE, POSITION.FIXED].indexOf(parent.container.styles.position) === -1;
+                if (parent.container.styles.overflowX !== OVERFLOW.VISIBLE) {
+                    const borderBox = calculateBorderBoxPath(parent.curves);
+                    const paddingBox = calculatePaddingBoxPath(parent.curves);
+                    if (!equalPath(borderBox, paddingBox)) {
+                        effects.unshift(
+                            new ClipEffect(paddingBox, EffectTarget.BACKGROUND_BORDERS | EffectTarget.CONTENT)
+                        );
+                    }
+                }
+            } else {
+                effects.unshift(...croplessEffects);
             }
+
+            parent = parent.parent;
         }
-        return effects;
+
+        return effects.filter((effect) => contains(effect.target, target));
     }
 }
 
@@ -87,7 +101,7 @@ const parseStackTree = (
     parent.container.elements.forEach((child) => {
         const treatAsRealStackingContext = contains(child.flags, FLAGS.CREATES_REAL_STACKING_CONTEXT);
         const createsStackingContext = contains(child.flags, FLAGS.CREATES_STACKING_CONTEXT);
-        const paintContainer = new ElementPaint(child, parent.getParentEffects());
+        const paintContainer = new ElementPaint(child, parent);
         if (contains(child.styles.display, DISPLAY.LIST_ITEM)) {
             listItems.push(paintContainer);
         }
@@ -182,7 +196,7 @@ const processListItems = (owner: ElementContainer, elements: ElementPaint[]) =>
 };
 
 export const parseStackingContexts = (container: ElementContainer): StackingContext => {
-    const paintContainer = new ElementPaint(container, []);
+    const paintContainer = new ElementPaint(container, null);
     const root = new StackingContext(paintContainer);
     const listItems: ElementPaint[] = [];
     parseStackTree(paintContainer, root, root, listItems);

tests/reftests/animation.html

@@ -5,46 +5,93 @@
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
     <script type="text/javascript" src="../test.js"></script>
     <style>
-        span {
-            color:blue;
-        }
-        p {
-            background-color: green;
-        }
-        div {
-            background: red;
-            border: 5px solid blue;
-            animation: spin 3s linear 1s infinite;
-        }
         body {
             font-family: Arial;
         }
 
-        @-webkit-keyframes spin {
+        @keyframes rotate0 {
             0% {
-                -webkit-transform: rotate(0deg);
                 transform: rotate(0deg);
-                /* Firefox 16+, IE 10+, Opera */ }
+            }
-            100% {
+        }
-                -webkit-transform: rotate(360deg);
-                transform: rotate(360deg);
-                /* Firefox 16+, IE 10+, Opera */ } }
 
-        @keyframes spin {
+        @keyframes rotate45 {
             0% {
-                -webkit-transform: rotate(0deg);
+                transform: rotate(45deg);
-                transform: rotate(0deg);
+            }
-                /* Firefox 16+, IE 10+, Opera */ }
+        }
-            100% {
+
-                -webkit-transform: rotate(360deg);
+        p {
-                transform: rotate(360deg);
+            font: 22px/1 Arial, sans-serif;
-                /* Firefox 16+, IE 10+, Opera */ } }
+            position: absolute;
+            top: 25%;
+            left: 25%;
+            width: 50%;
+            height: 50%;
+            color: #fff;
+            background-color: #666;
+            line-height: 90px;
+            text-align: center;
+        }
+
+        .transformed.working p {
+            transform: rotate(45deg);
+        }
+
+        .animated.working p {
+            animation-name: rotate0;
+            animation-duration: 1ms, 1ms;
+            animation-play-state: paused;
+        }
+
+        .animated.broken p {
+            animation-name: rotate45;
+            animation-duration: 1ms;
+            animation-play-state: paused;
+        }
+
+        .transitioned p {
+            transition: 1ms, 1ms;
+            transform: rotate(45deg)
+        }
+
+        .transition-delay {
+            transition: 1ms;
+            transition-delay: 50ms;
+            transform: rotate(45deg)
+        }
+
+        div {
+            float: left;
+            clear: left;
+            margin-right: 10px;
+            background-color: #ccc;
+            width: 180px;
+            height: 180px;
+            position: relative;
+        }
     </style>
 
 </head>
 <body>
-<div style="clip: rect(0px, 400px, 50px, 200px); ">Some inline text <span> followed by text in span </span> followed by more inline text.
+<div class="transformed working">
-    <p>Then a block level element.</p>
+    <p>Hello</p>
-    Then more inline text.</div>
+</div>
+
+<div class="animated working">
+    <p>Hello</p>
+</div>
+
+<div class="animated broken">
+    <p>Hello</p>
+</div>
+
+<div class="transitioned broken">
+    <p>Hello</p>
+</div>
+
+<div class="transition-delay">
+    <p>Hello</p>
+</div>
 </body>
 </html>

tests/reftests/background/encoded.html

@@ -4,6 +4,7 @@
         <title>Background attribute tests</title>
         <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
         <script type="text/javascript" src="../../test.js"></script>
+        <link href="base64.css" rel="stylesheet">
         <style>
             html {
                 background-color: red;
@@ -39,6 +40,9 @@
                 background:url("data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEASABIAAD/2wBDAAMCAgMCAgMDAwMEAwMEBQgFBQQEBQoHBwYIDAoMDAsKCwsNDhIQDQ4RDgsLEBYQERMUFRUVDA8XGBYUGBIUFRT/2wBDAQMEBAUEBQkFBQkUDQsNFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBT/wAARCABLAEsDAREAAhEBAxEB/8QAHAAAAgMBAQEBAAAAAAAAAAAABQcEBggCAwAJ/8QANxAAAgECBQEHAQUIAwEAAAAAAQIDBBEABQYSITEHExQiQVFhcTKBkbHBCCNCUnLR4fAWYqLx/8QAGwEAAQUBAQAAAAAAAAAAAAAAAQIDBAUGAAf/xAAzEQACAgECAwQHCAMAAAAAAAAAAQIDEQQhEjFBIlFhcRMUgZGhsdEFFSNCUsHh8DKi8f/aAAwDAQACEQMRAD8AxREirbfKlv6rYxDz0R6mmj2eohpqrLKmGVTJTVsEpG65sHF8dBSakpLmn8hq5pxTXRo0DlaCn1dB7eJZfxxD0b/FiyFqVmmQ1Yo/KMaRFBIj5tCTFSG3SsgP/sf3x0t0JTJtLTlJa0FSP31+R/0TCcYG8nM0Q9sLAQJoRzgnECoiFjggB7RC5wsSZHTLaGCQpJBSq68EbQ1sUjst72bdU1dy9x1mlPQJlNQY0p+9Rd67YwDcG/HGBVK12JPOPMF1darbUVt4GgoazdmeW1YNxKaea/8AUoJxVafsTj4P9xm5cVcvJjjhljjlRZDtBPt1xqlzMu3tsNjSulMrziigkVUkUOHK9RcdD8Ys6owcStsnJMsFV2ZUrxVDRqQ0luSL9P8AH5YcdUWhtWtC91T2e1mWRPUQx740BLKt7/X6YhTqcd0S4WKWxQZhiOPA+ccYICAy3Y4UAyXS/uwFXLGFv5kX++KCWHu5m6i3y4SbI7y0k0bZbZHQqTtT2/qw3FRUk1P5/QVJtxa4X8PqNHIanxmndMzg+Z6KEc+6kqfyxG4MXuPiyFJ4qcn3F5o9RGrzPbI5aRz6np7D2GLpSbfiZ9xWMD20Fq5MlgpF72PdNIyGE8OFFvMPjn7/ALsWlE3FIrbYcTH5keaw11MtnVz063xZqWSvccMkZhRwT08m4KRY3BwibSW4uCeTJ+qKA5PnuYURBXuZmVQ/Xbe6n8CMVTWGWXQATOCCLjBAQXbzHphQkyTS5XE1HTXpttTtPfB5bruvxt+LdcUc7e08PY3dcez2luTIsm3GwjhF+OW/xhl3eLHuHwLpo1pn0lkrRh5no2qICkSGRmZJSQAo6khhxhmxS9azFc8P3kLsqiUZeQ3dPafhmrFkU7HUh3Exsyi9269LeuL2Me0ZWUsIM6p7EKjtkzTLXi1XVaWaEvfwSkmqJZdq7Qy9LdSeOeD6WlSRAm8YbNDN2f6ry6lpqXRGq6RqjLXjapgzaiM3i4woPdK6sCpYXs3NuOuJXBjkR3JNbjRy+KvkpF8bEaaV1tYi5/8AuI0k2tx1NLkYQ/aB1XmucdrGeHLNQ5jl+X07ikjiptiITGNrNfaSSWvyTf7gMUt2olGxxjyRe0Uw9GnOOWxXyVuoVLM+rc7kBvYeIC2/BcNeszew+qK1+UGTVmdGRj/yjPV+PGH+2HVqJ94PRV/pQtos+1SPs0WVi/S5kP64S9PpespfAlLUaz9Efj9QtkEmuc/roaajgycB2AaRo5NsY9WJB6DHeraVvCcm/Z9BM9Vq4rMlFL2/Dc0dp7L4dO5eKWl6k7pJtoVpGtyxA6dOgxIqpVawipuvldLMgtRzIjbDJsBYeW32sSlAiNkLtI7Y6nRkMcOWGeKYKqrMsO8Ru91Qkeo3bfKP1wpN8XDEXCtSWWGv2Le1nXk2qJn1VXjNVrHWJJpy3euIRtLcKAFAO0X6k8Di+Jzmk4xiQ5UWRUnYsGvO23thyvs60bUVIq0GcV1O4yykU3ldyNvegeiITck8XFuThOqvhRXxN7vkDSUTvsUUtlzPzdzqecS940zOzkvI7HlmuSxPyeuMfF5e/M1/CkerKFiaZQZIiN19wJ+oGE5T2Ow2QGkhc7u7fn6YWmDhYMnyDLGBanrp43JG8TQhx09CtrYs5aaPSTIEPtKf54L2PHzyXrRmVQZTlJZFQyyctIqlbj0HOHKqvRrfdkbUah3yzyXcWnK6lK4Ps+0h2snqDiXFZITeA/leTSV1ZGii537DZbgAjn64kRhljbkkhqt+zkmo6ekLx0s61ZNJJT1se5GABNn4IN/0BxIlpctSi8MajqOcZLKG32e9immtA6berly+nVqaF3ip4dyxR2UndybliR1J4Fhh6FSj2p7sZna32Y8jM+faKzjU2YNmWZ54tZmFSAZJ54mdiB0A6WUDoBYYoZ6C62XHZYm34MtofaNNceCFbS80B6jskrWRQmb0e8g3D07gLb7zfCPuufSa9zF/elfWD96Kzn2iZ8mjqFmmjd46hoN5tGsjKBu2BjubhlPAsAet8Vl+mlTlt9f7jr+xa1aiNuMLpn+9Clyaan3tt7vbfjzjEbLJWUUxqqxBtdR6e+NJgy/IZmlKiTMdPpO8RiuWsL/aAPUYUlsBvvO8glmi1LHGEURzAhh6gAXGFxW4mT2HbpOhTxSSOGWNrbghBJ+behxOgiLKRobSWo6fJKGE11YYYmO9TI/mP8J2jkkm1uP1xNTSW5F3b2CGp9UxHTGZVCkmnaMokbdTu8vP44alPIBCxkKFHJsStwfS5FsN5AfSSkpMyXEaAFiebLwCfxOCAomrshgGofFzw0UVPVoHlqJgu+NhZJG5IFhwbnnzcemKfVVQVnHJJZ69f748zQaO6cqlFNvG2Onev+chT1MEwqZfDyQdxuOwVDhZAL9CPjpjOvbkzQLxFk8TpIA6kpe7WHpjTYMrnI49KVVHmGX0cdOsnhwLI5Ujc3sB1Nr9elz64dSBkFZ+9To7PaatqwsNNFUhWk3G0YY28xP8PNyfS+OinGRzawa07E4IaySCaVVeOQdOoBHS/vixqIFnMtnb8tatHpxcpjgepjqHlKzOYwU2bSoYA26g9PTBtWcYG4y4XuU4Z9mE+TJl88cMUJ2FlDFzcG9gbDi+GEmFyT5AWSInvFFyFJHHXp/nBE5PHLA0Ek9M7EtNEYw59T8/76YMe46W+5W9dd+cm76IWMDhZbRxuAkg2tuDgggMFuBzyeuIesjmviXTwT2fmWOhklY4Pr5815Cxly+GRwxy+lclQdypMoPA5spKj7iR7YoJVtPHAv8AZfLK9xpI2Jr/ACfwItT2YTToVjCsTx5W639Mah0dxkVbgjZVojV+nqhXyeKOeON9yxzuFHwASeAOTb3OBGqaFemj1Gpn2VVuudD51kdRkcFDPWqIvE1dTG7qLLd1CX5JDDn64kcDwMuxE3sNoNWdnarltd3FZRx37mYVQOxFAsGH2r9eelrYEISiGVkZLI3M/wBRTallp5p9qLGuyNAb2FuTf5OHWskdsATRb1L2Fgf9/XCcHZIrRHxJHsdxHryPyIwMCiPLAwa9gHS4t7m/GOwcQ66natgqaSQeWqjaJSSP4hcG5vYggdQbH3wmUOOLj3jlcuCal3CIqWplqJAaWGNtxJSSdkYH1upVbG/wMZnixtlL2r+PkazhT33+P8jGy5iViYnzWBv841hjwplh3RwX9SXPyS2OQcBNpWpYZWiO096E6X8u61vwxyE9AplEjLPmLBjdQFHwOOMFdRL5BOjdmijJJJAU/wC/gMcgs6pnLIpJuTUAH6XtgndWjwy1Qc1qeP5fzwFzO6EOR28dSDcfPVhW56j93x+eB1CBdXVEtLmmWiJzGDOQbH03DCJbNBXJiU1zUyUGtc+p6dzDBFXzqkacBQJDYDGV1F9kLpxi9k38zbaaqE6ISkt2kf/Z");
             }
 
+            .encoded2 {
+                background-size: cover;
+            }
         </style>
 
     </head>
@@ -46,6 +50,7 @@
 
         <div class="medium">
             <div class="encoded"></div>
+            <div class="base64 encoded2"></div>
         </div>
 
     </body>

tests/reftests/background/linear-gradient2.html

@@ -46,6 +46,7 @@
 		<div style="background: linear-gradient(60deg, hsla(120,80%,50%,0.8) 0%, transparent 50%, rgba(255,100,100,0.5) 100%);"></div>
 		<div style="background: linear-gradient(to right, red 20%, orange 20% 40%, yellow 40% 60%, green 60% 80%, blue 80%);"></div>
 		<div style="background: linear-gradient(-45deg, #FF0000 40%, #00FF00 50%);"></div>
+		<div style="background:linear-gradient(217deg, rgba(255, 0, 0, 0.8) 10%, rgba(255, 0, 0, 0) 70.71%), linear-gradient(127deg, rgba(0, 255, 0, 0.8) 20%, rgba(0, 255, 0, 0) 70.71%), linear-gradient(336deg, rgba(0, 0, 255, 0.8) 40%, rgba(0, 0, 255, 0) 70.71%), rgb(255, 255, 255);"></div>
 		<div class="linearGradient"></div>
 	</body>
 </html>

tests/reftests/overflow/overflow.html

@@ -51,6 +51,9 @@
         .scroll {
             overflow: scroll;
         }
+        .clip {
+            overflow: clip;
+        }
         .auto {
             overflow: auto;
         }
@@ -70,6 +73,10 @@
     scroll
     <p class="scroll">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec luctus pretium facilisis. Praesent rutrum eget nisl in tristique. Sed tincidunt nisl et tellus vulputate, nec rhoncus orci pretium.</p>
 </div>
+<div class="cell">
+    clip
+    <p class="clip">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec luctus pretium facilisis. Praesent rutrum eget nisl in tristique. Sed tincidunt nisl et tellus vulputate, nec rhoncus orci pretium.</p>
+</div>
 <div class="cell">
     auto
     <p class="auto">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec luctus pretium facilisis. Praesent rutrum eget nisl in tristique. Sed tincidunt nisl et tellus vulputate, nec rhoncus orci pretium.</p>
@@ -129,5 +136,17 @@
     </script>
 </div>
 <div class="hidden">Hidden<div style="opacity: 0.5">With opacity</div></div>
+<div class="hidden" style="height: 0px; width: 50px;">
+    <div style="position: absolute; width: 50px; height: 50px; left:400px;">absolute on static parent</div>
+</div>
+<div class="hidden" style="height: 0px; width: 50px;">
+    <div style="position: relative; width: 10px; height: 10px; left:400px;">relative on static parent</div>
+</div>
+<div class="hidden" style="height: 0px; width: 50px;">
+    <div style="position: fixed; width: 50px; height: 50px; left:400px; top:0;">fixed on static parent</div>
+</div>
+<div class="hidden" style="height: 0px; width: 50px;position: relative;">
+    <div style="position: absolute; width: 10px; height: 10px; left:400px;">absolute on relative parent</div>
+</div>
 </body>
 </html>

tests/reftests/pseudo-content.html

@@ -86,6 +86,20 @@
                                             of the section counter, separated
                                             by a period */
         }
+
+        .issue-2639 {
+            display: flex;
+        }
+
+        .issue-2639::before {
+            content: counter(ol0) '. ';
+            counter-increment: ol0;
+        }
+
+        .issue-2639:first-child {
+            counter-reset: ol0;
+        }
+
     </style>
 </head>
 <body>
@@ -163,5 +177,10 @@
     <li>item</li>          <!-- 2     -->
 </ol>
 
+<ol>
+    <li class="issue-2639">one</li>
+    <li class="issue-2639">two</li>
+</ol>
+
 </body>
 </html>

tests/reftests/text/text.html

@@ -149,5 +149,6 @@
     <span>[AB / CD]</span>
 </div>
 <div>Emojis 🤷🏾‍♂️👨‍👩‍👧‍👦 :)</div>
+<div style="letter-spacing: 2px">Emojis with letter-spacing 🤷🏾‍♂️👨‍👩‍👧‍👦 :)</div>
 </body>
 </html>

www/package.json

@@ -32,8 +32,10 @@
   "license": "MIT",
   "main": "n/a",
   "scripts": {
-    "copybuild": "mkdirp public/dist && cpy ../dist/*.js public/dist",
+    "copy:build": "mkdirp public/dist && cpy ../dist/*.js public/dist",
-    "build": "npm run copybuild && gatsby build",
+    "copy:src": "mkdirp public/src && cpy ../src/**/*.ts public/src --parents",
+    "copy": "npm run copy:build && npm run copy:src",
+    "build": "npm run copy && gatsby build",
     "start": "gatsby develop",
     "test": "echo \"Error: no test specified\" && exit 1"
   }

www/src/preview.ts

@@ -22,18 +22,30 @@ type TestList = {[key: string]: Test[]};
 
 function onTestChange(browserTests: Test[]) {
     if (browserSelector) {
+        const currentSelection = browserSelector.value;
         while (browserSelector.firstChild) {
             browserSelector.firstChild.remove();
         }
+
+        let newSelection;
+
         browserTests.forEach((browser, i) => {
             if (i === 0) {
-                onBrowserChange(browser);
+                newSelection = browser;
             }
             const option = document.createElement('option');
             option.value = browser.id;
+            if (browser.id === currentSelection) {
+                option.selected = true;
+                newSelection = browser;
+            }
             option.textContent = browser.id.replace(/_/g, ' ');
             browserSelector.appendChild(option);
         });
+
+        if (newSelection) {
+            onBrowserChange(newSelection);
+        }
     }
 }
 
@@ -48,13 +60,20 @@ function onBrowserChange(browserTest: Test) {
             previewImage.style.transformOrigin = '';
         }
     }
+
+    if (history) {
+        history.replaceState(null, document.title, `?browser=${browserSelector?.value}&test=${testSelector?.value}`);
+    }
 }
 
 function selectTest(testName: string) {
-    if (testLink) {
+    const foundTest = testList[testName];
-        testLink.textContent = testLink.href = testName;
+    if (foundTest) {
+        if (testLink) {
+            testLink.textContent = testLink.href = testName;
+        }
+        onTestChange(foundTest);
     }
-    onTestChange(testList[testName]);
 }
 
 const UP_ARROW = 38;
@@ -116,15 +135,29 @@ if (testSelector && browserSelector) {
         false
     );
 
-    const tests: string[] = Object.keys(testList);
+    let testFromUrl: string | null = null;
-    tests.forEach((testName, i) => {
+
-        if (i === 0) {
+    if (URLSearchParams) {
-            selectTest(testName);
+        const url = new URLSearchParams(location.search);
+        testFromUrl = url.get('test');
+        if (browserSelector) {
+            const option = document.createElement('option');
+            browserSelector.appendChild(option);
+            browserSelector.value = option.value = url.get('browser') ?? '';
         }
+    }
+
+    const tests: string[] = Object.keys(testList);
+    tests.forEach((testName) => {
         const option = document.createElement('option');
         option.value = testName;
         option.textContent = testName;
+        if (option.value === testFromUrl) {
+            option.selected = true;
+        }
 
         testSelector.appendChild(option);
     });
+
+    selectTest(testSelector.value ?? testSelector.firstChild?.textContent ?? '');
 }