[Devtools] Moved DataGridNode's .parent property to proper getter/setter

third_party/WebKit/Source/devtools/front_end/data_grid/DataGrid.js

Index: third_party/WebKit/Source/devtools/front_end/data_grid/DataGrid.js
diff --git a/third_party/WebKit/Source/devtools/front_end/data_grid/DataGrid.js b/third_party/WebKit/Source/devtools/front_end/data_grid/DataGrid.js
index 9bb1cbc7820613553029a4c727f3c91117bac4f9..a07682a7df8070fc4223143f0a06b8e1c1b47965 100644
--- a/third_party/WebKit/Source/devtools/front_end/data_grid/DataGrid.js
+++ b/third_party/WebKit/Source/devtools/front_end/data_grid/DataGrid.js
@@ -804,13 +804,13 @@ DataGrid.DataGrid = class extends Common.Object {
         else
           this.selectedNode.collapse();
         handled = true;
-      } else if (this.selectedNode.parent && !this.selectedNode.parent._isRoot) {
+      } else if (this.selectedNode.parent() && !this.selectedNode.parent()._isRoot) {
         handled = true;
-        if (this.selectedNode.parent.selectable) {
-          nextSelectedNode = this.selectedNode.parent;
+        if (this.selectedNode.parent().selectable) {
+          nextSelectedNode = this.selectedNode.parent();
           handled = nextSelectedNode ? true : false;
-        } else if (this.selectedNode.parent) {
-          this.selectedNode.parent.collapse();
+        } else if (this.selectedNode.parent()) {
+          this.selectedNode.parent().collapse();
         }
       }
     } else if (event.key === 'ArrowRight') {
@@ -856,14 +856,14 @@ DataGrid.DataGrid = class extends Common.Object {
   updateSelectionBeforeRemoval(root, onlyAffectsSubtree) {
     var ancestor = this.selectedNode;
     while (ancestor && ancestor !== root)
-      ancestor = ancestor.parent;
+      ancestor = ancestor.parent();
     // Selection is not in the subtree being deleted.
     if (!ancestor)
       return;
 
     var nextSelectedNode;
     // Skip subtree being deleted when looking for the next selectable node.
-    for (ancestor = root; ancestor && !ancestor.nextSibling; ancestor = ancestor.parent) {
+    for (ancestor = root; ancestor && !ancestor.nextSibling; ancestor = ancestor.parent()) {
     }
     if (ancestor)
       nextSelectedNode = ancestor.nextSibling;
@@ -1257,7 +1257,7 @@ DataGrid.DataGridNode = class extends Common.Object {
     /** @type {?DataGrid.DataGrid} */
     this.dataGrid = null;
     /** @type {?NODE_TYPE} */
-    this.parent = null;
+    this._parent = null;
     /** @type {?NODE_TYPE} */
     this.previousSibling = null;
     /** @type {?NODE_TYPE} */
@@ -1333,6 +1333,24 @@ DataGrid.DataGridNode = class extends Common.Object {
   }
 
   /**
+   * @param {?NODE_TYPE} parentNode
+   * @protected
+   */
+  setParent(parentNode) {
+    delete this._depth;
+    this.children.forEach(child => child.setParent(this));
+    if (this._parent !== parentNode)
+      this._parent = parentNode;
+  }
+
+  /**
+   * @return {?NODE_TYPE}
+   */
+  parent() {
+    return this._parent;
+  }
+
+  /**
    * @return {!Object.<string, *>}
    */
   get data() {
@@ -1354,14 +1372,14 @@ DataGrid.DataGridNode = class extends Common.Object {
     if (this._revealed !== undefined)
       return this._revealed;
 
-    var currentAncestor = this.parent;
+    var currentAncestor = this.parent();
     while (currentAncestor && !currentAncestor._isRoot) {
       if (!currentAncestor.expanded) {
         this._revealed = false;
         return false;
       }
 
-      currentAncestor = currentAncestor.parent;
+      currentAncestor = currentAncestor.parent();
     }
 
     this._revealed = true;
@@ -1458,8 +1476,8 @@ DataGrid.DataGridNode = class extends Common.Object {
   get depth() {
     if (this._depth !== undefined)
       return this._depth;
-    if (this.parent && !this.parent._isRoot)
-      this._depth = this.parent.depth + 1;
+    if (this.parent() && !this.parent()._isRoot)
+      this._depth = this.parent().depth + 1;
     else
       this._depth = 0;
     return this._depth;
@@ -1603,7 +1621,7 @@ DataGrid.DataGridNode = class extends Common.Object {
   insertChild(child, index) {
     if (!child)
       throw 'insertChild: Node can\'t be undefined or null.';
-    if (child.parent === this) {
+    if (child.parent() === this) {
       var currentIndex = this.children.indexOf(child);
       if (currentIndex < 0)
         console.assert(false, 'Inconsistent DataGrid state');
@@ -1618,11 +1636,10 @@ DataGrid.DataGridNode = class extends Common.Object {
     this.children.splice(index, 0, child);
     this.setHasChildren(true);
 
-    child.parent = this;
+    child.setParent(this);
     child.dataGrid = this.dataGrid;
     child.recalculateSiblings(index);
 
-    child._depth = undefined;
     child._revealed = undefined;
     child._attached = false;
     child._shouldRefreshChildren = true;
@@ -1630,7 +1647,6 @@ DataGrid.DataGridNode = class extends Common.Object {
     var current = child.children[0];
     while (current) {
       current.dataGrid = this.dataGrid;
-      current._depth = undefined;
       current._revealed = undefined;
       current._attached = false;
       current._shouldRefreshChildren = true;
@@ -1644,8 +1660,8 @@ DataGrid.DataGridNode = class extends Common.Object {
   }
 
   remove() {
-    if (this.parent)
-      this.parent.removeChild(this);
+    if (this.parent())
+      this.parent().removeChild(this);
   }
 
   /**
@@ -1654,7 +1670,7 @@ DataGrid.DataGridNode = class extends Common.Object {
   removeChild(child) {
     if (!child)
       throw 'removeChild: Node can\'t be undefined or null.';
-    if (child.parent !== this)
+    if (child.parent() !== this)
       throw 'removeChild: Node is not a child of this node.';
 
     if (this.dataGrid)
@@ -1669,7 +1685,7 @@ DataGrid.DataGridNode = class extends Common.Object {
       child.nextSibling.previousSibling = child.previousSibling;
 
     child.dataGrid = null;
-    child.parent = null;
+    child.setParent(null);
     child.nextSibling = null;
     child.previousSibling = null;
 
@@ -1684,7 +1700,7 @@ DataGrid.DataGridNode = class extends Common.Object {
       var child = this.children[i];
       child._detach();
       child.dataGrid = null;
-      child.parent = null;
+      child.setParent(null);
       child.nextSibling = null;
       child.previousSibling = null;
     }
@@ -1697,15 +1713,15 @@ DataGrid.DataGridNode = class extends Common.Object {
    * @param {number} myIndex
    */
   recalculateSiblings(myIndex) {
-    if (!this.parent)
+    if (!this.parent())
       return;
 
-    var previousChild = this.parent.children[myIndex - 1] || null;
+    var previousChild = this.parent().children[myIndex - 1] || null;
     if (previousChild)
       previousChild.nextSibling = this;
     this.previousSibling = previousChild;
 
-    var nextChild = this.parent.children[myIndex + 1] || null;
+    var nextChild = this.parent().children[myIndex + 1] || null;
     if (nextChild)
       nextChild.previousSibling = this;
     this.nextSibling = nextChild;
@@ -1781,11 +1797,11 @@ DataGrid.DataGridNode = class extends Common.Object {
   reveal() {
     if (this._isRoot)
       return;
-    var currentAncestor = this.parent;
+    var currentAncestor = this.parent();
     while (currentAncestor && !currentAncestor._isRoot) {
       if (!currentAncestor.expanded)
         currentAncestor.expand();
-      currentAncestor = currentAncestor.parent;
+      currentAncestor = currentAncestor.parent();
     }
 
     this.element().scrollIntoViewIfNeeded(false);
@@ -1865,10 +1881,10 @@ DataGrid.DataGridNode = class extends Common.Object {
 
     node = this;
     while (node && !node._isRoot && !((!skipHidden || node.revealed) ? node.nextSibling : null) &&
-           node.parent !== stayWithin) {
+           node.parent() !== stayWithin) {
       if (info)
         info.depthChange -= 1;
-      node = node.parent;
+      node = node.parent();
     }
 
     if (!node)
@@ -1897,10 +1913,10 @@ DataGrid.DataGridNode = class extends Common.Object {
     if (node)
       return node;
 
-    if (!this.parent || this.parent._isRoot)
+    if (!this.parent() || this.parent()._isRoot)
       return null;
 
-    return this.parent;
+    return this.parent();
   }
 
   /**
@@ -1956,17 +1972,17 @@ DataGrid.DataGridNode = class extends Common.Object {
     if (this._savedPosition)
       return;
 
-    if (!this.parent)
+    if (!this.parent())
       throw 'savePosition: Node must have a parent.';
-    this._savedPosition = {parent: this.parent, index: this.parent.children.indexOf(this)};
+    this._savedPosition = {parent: this.parent(), index: this.parent().children.indexOf(this)};
   }
 
   restorePosition() {
     if (!this._savedPosition)
       return;
 
-    if (this.parent !== this._savedPosition.parent)
-      this._savedPosition.parent.insertChild(this, this._savedPosition.index);
+    if (this.parent() !== this._savedPosition.parent())
+      this._savedPosition.parent().insertChild(this, this._savedPosition.index);
 
     this._savedPosition = null;
   }