fix: multi token overflow

src/css/index.ts

@@ -40,7 +40,7 @@ import {listStyleImage} from './property-descriptors/list-style-image';
 import {listStylePosition} from './property-descriptors/list-style-position';
 import {listStyleType} from './property-descriptors/list-style-type';
 import {marginBottom, marginLeft, marginRight, marginTop} from './property-descriptors/margin';
-import {overflow} from './property-descriptors/overflow';
+import {overflow, OVERFLOW} from './property-descriptors/overflow';
 import {overflowWrap} from './property-descriptors/overflow-wrap';
 import {paddingBottom, paddingLeft, paddingRight, paddingTop} from './property-descriptors/padding';
 import {textAlign} from './property-descriptors/text-align';
@@ -118,7 +118,8 @@ export class CSSParsedDeclaration {
     marginBottom: CSSValue;
     marginLeft: CSSValue;
     opacity: ReturnType<typeof opacity.parse>;
-    overflow: ReturnType<typeof overflow.parse>;
+    overflowX: OVERFLOW;
+    overflowY: OVERFLOW;
     overflowWrap: ReturnType<typeof overflowWrap.parse>;
     paddingTop: LengthPercentage;
     paddingRight: LengthPercentage;
@@ -180,7 +181,9 @@ export class CSSParsedDeclaration {
         this.marginBottom = parse(marginBottom, declaration.marginBottom);
         this.marginLeft = parse(marginLeft, declaration.marginLeft);
         this.opacity = parse(opacity, declaration.opacity);
-        this.overflow = parse(overflow, declaration.overflow);
+        const overflowTuple = parse(overflow, declaration.overflow);
+        this.overflowX = overflowTuple[0];
+        this.overflowY = overflowTuple[overflowTuple.length > 1 ? 1 : 0];
         this.overflowWrap = parse(overflowWrap, declaration.overflowWrap);
         this.paddingTop = parse(paddingTop, declaration.paddingTop);
         this.paddingRight = parse(paddingRight, declaration.paddingRight);

src/css/property-descriptors/overflow.ts

@@ -1,27 +1,30 @@
-import {IPropertyIdentValueDescriptor, PropertyDescriptorParsingType} from '../IPropertyDescriptor';
+import {IPropertyListDescriptor, PropertyDescriptorParsingType} from '../IPropertyDescriptor';
+import {CSSValue, isIdentToken} from '../syntax/parser';
 export enum OVERFLOW {
     VISIBLE = 0,
     HIDDEN = 1,
     SCROLL = 2,
     AUTO = 3
 }
 
-export const overflow: IPropertyIdentValueDescriptor<OVERFLOW> = {
+export const overflow: IPropertyListDescriptor<OVERFLOW[]> = {
     name: 'overflow',
     initialValue: 'visible',
     prefix: false,
-    type: PropertyDescriptorParsingType.IDENT_VALUE,
-    parse: (overflow: string) => {
-        switch (overflow) {
-            case 'hidden':
-                return OVERFLOW.HIDDEN;
-            case 'scroll':
-                return OVERFLOW.SCROLL;
-            case 'auto':
-                return OVERFLOW.AUTO;
-            case 'visible':
-            default:
-                return OVERFLOW.VISIBLE;
-        }
+    type: PropertyDescriptorParsingType.LIST,
+    parse: (tokens: CSSValue[]): OVERFLOW[] => {
+        return tokens.filter(isIdentToken).map(overflow => {
+            switch (overflow.value) {
+                case 'hidden':
+                    return OVERFLOW.HIDDEN;
+                case 'scroll':
+                    return OVERFLOW.SCROLL;
+                case 'auto':
+                    return OVERFLOW.AUTO;
+                case 'visible':
+                default:
+                    return OVERFLOW.VISIBLE;
+            }
+        });
     }
 };

src/render/stacking-context.ts

@@ -48,7 +48,7 @@ export class ElementPaint {
             this.effects.push(new TransformEffect(offsetX, offsetY, matrix));
         }
 
-        if (element.styles.overflow !== OVERFLOW.VISIBLE) {
+        if (element.styles.overflowX !== OVERFLOW.VISIBLE) {
             const borderBox = calculateBorderBoxPath(this.curves);
             const paddingBox = calculatePaddingBoxPath(this.curves);
 
@@ -63,7 +63,7 @@ export class ElementPaint {
 
     getParentEffects(): IElementEffect[] {
         const effects = this.effects.slice(0);
-        if (this.container.styles.overflow !== OVERFLOW.VISIBLE) {
+        if (this.container.styles.overflowX !== OVERFLOW.VISIBLE) {
             const borderBox = calculateBorderBoxPath(this.curves);
             const paddingBox = calculatePaddingBoxPath(this.curves);
             if (!equalPath(borderBox, paddingBox)) {

tests/reftests/overflow/overflow.html

@@ -74,6 +74,10 @@
     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>
 </div>
+<div class="cell">
+    visible hidden
+    <p style="overflow: visible hidden">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>
 <h1>Overflow: visible</h1>
 <div>              Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like <b>Aldus PageMaker</b> including versions of Lorem Ipsum.
 </div>