Adressed issue

Author: mattscepter

lib/commons/dom/create-grid.js

@@ -14,6 +14,7 @@ const DEFAULT_LEVEL = 0.1;
 const FLOAT_LEVEL = 0.2;
 const POSITION_LEVEL = 0.3;
 let nodeIndex = 0;
+let gridSize = constants.gridSize;
 
 /**
  * Setup the 2d grid and add every element to it, even elements not
@@ -23,14 +24,16 @@ let nodeIndex = 0;
 export default function createGrid(
   root = document.body,
   rootGrid,
-  parentVNode = null
+  parentVNode = null,
+  ruleData = null
 ) {
+  if (ruleData && ruleData.ruleId && ruleData.gridSize) {
+    gridSize = ruleData.gridSize;
+  }
+
   // Prevent multiple calls per run
   if (cache.get('gridCreated') && !parentVNode) {
-    if (cache.get('gridSize')) {
-      return cache.get('gridSize');
-    }
-    return constants.gridSize;
+    return gridSize;
   }
   cache.set('gridCreated', true);
 
@@ -114,10 +117,7 @@ export default function createGrid(
     node = treeWalker.nextNode();
   }
 
-  if (cache.get('gridSize')) {
-    return cache.get('gridSize');
-  }
-  return constants.gridSize;
+  return gridSize;
 }
 
 /**
@@ -437,10 +437,7 @@ class Grid {
    * @returns {number}
    */
   toGridIndex(num) {
-    if (cache.get('gridSize')) {
-      return Math.floor(num / cache.get('gridSize'));
-    }
-    return Math.floor(num / constants.gridSize);
+    return Math.floor(num / gridSize);
   }
 
   /**

lib/commons/dom/get-element-stack.js

@@ -9,8 +9,21 @@ import createGrid from './create-grid';
  * @param {Node} node
  * @return {Node[]}
  */
-function getElementStack(node, isCoordsPassed = false, x, y) {
-  createGrid();
+function getElementStack(
+  node,
+  ruleId = null,
+  isCoordsPassed = false,
+  x = null,
+  y = null
+) {
+  if (ruleId === 'zoom-text-overlap-viewport') {
+    createGrid(document.body, null, null, {
+      ruleId,
+      gridSize: 500
+    });
+  } else {
+    createGrid();
+  }
 
   const vNode = getNodeFromTree(node);
   const grid = vNode._grid;

lib/commons/dom/get-overflow-hidden-ancestors.js

@@ -1,4 +1,3 @@
-import cache from '../../core/base/cache';
 import memoize from '../../core/utils/memoize';
 
 /**
@@ -9,7 +8,7 @@ import memoize from '../../core/utils/memoize';
  * @returns {VirtualNode[]}
  */
 const getOverflowHiddenAncestors = memoize(
-  function getOverflowHiddenAncestorsMemoized(vNode) {
+  function getOverflowHiddenAncestorsMemoized(vNode, ruleId = null) {
     const ancestors = [];
 
     if (!vNode) {
@@ -18,7 +17,7 @@ const getOverflowHiddenAncestors = memoize(
 
     const overflow = vNode.getComputedStylePropertyValue('overflow');
 
-    if (cache.get('200%ZoomRule')) {
+    if (ruleId && ruleId === 'zoom-text-overlap-viewport') {
       if (
         overflow.includes('hidden') ||
         overflow.includes('clip') ||

lib/commons/dom/get-rect-stack.js

@@ -5,9 +5,9 @@ export function getRectStack(
   grid,
   rect,
   recursed = false,
-  isCoordsPassed,
-  x,
-  y
+  isCoordsPassed = false,
+  x = null,
+  y = null
 ) {
   const center = getRectCenter(rect);
   const gridCell = grid.getCellFromPoint(center) || [];

lib/commons/dom/get-visible-child-text-rects.js

@@ -2,7 +2,6 @@ import { getNodeFromTree, memoize } from '../../core/utils';
 import { sanitize } from '../text';
 import { getIntersectionRect, getRectCenter, isPointInRect } from '../math';
 import getOverflowHiddenAncestors from './get-overflow-hidden-ancestors';
-import cache from '../../core/base/cache';
 
 /**
  * Get the visible text client rects of a node.
@@ -12,29 +11,30 @@ import cache from '../../core/base/cache';
  * @param {Element} node
  */
 const getVisibleChildTextRects = memoize(
-  function getVisibleChildTextRectsMemoized(node) {
+  function getVisibleChildTextRectsMemoized(node, ruleId = null) {
     const vNode = getNodeFromTree(node);
     const nodeRect = vNode.boundingClientRect;
     const clientRects = [];
-    const overflowHiddenNodes = getOverflowHiddenAncestors(vNode);
+    const overflowHiddenNodes = getOverflowHiddenAncestors(vNode, ruleId);
 
     node.childNodes.forEach(textNode => {
       if (textNode.nodeType !== 3 || sanitize(textNode.nodeValue) === '') {
         return;
       }
 
       const contentRects = getContentRects(textNode);
-      if (
-        isOutsideNodeBounds(contentRects, nodeRect) &&
-        !cache.get('200%ZoomRule')
-      ) {
+      if (isOutsideNodeBounds(contentRects, nodeRect) && !ruleId) {
         return;
       }
 
       clientRects.push(...filterHiddenRects(contentRects, overflowHiddenNodes));
     });
 
-    if (clientRects.length <= 0 && cache.get('200%ZoomRule')) {
+    if (
+      clientRects.length <= 0 &&
+      ruleId &&
+      ruleId === 'zoom-text-overlap-viewport'
+    ) {
       return [];
     }
     /**