[ADF-2979] Updated props script to avoid copying missing JSDocs (#3327)

* [ADF-2979] Updated tools to ignore blank JSDocs for inputs/outputs

* [ADF-2979] Bug fixes for handling missing tables, etc

tools/doc/mdNav.ts

@@ -0,0 +1,81 @@
+
+export class MDNav {
+    
+    constructor(public root: any, public pos: number = 0) {}
+
+    find(test: (element: any) => boolean = () => true, index: number = 0): MDNav {
+        if (!this.root || !this.root.children) {
+            return new MDNav(null);
+        }
+
+        let currIndex = 0;
+
+        for (let i = this.pos; i < this.root.children.length; i++) {
+            let child = this.root.children[i];
+
+            if (test(child)) {
+                if (currIndex === index) {
+                    return new MDNav(this.root, i);
+                } else {
+                    currIndex++;
+                }
+            }
+        }
+
+        return new MDNav(this.root, this.root.children.length);
+    }
+
+
+    heading(test: (element: any) => boolean = () => true, index: number = 0): MDNav {
+        return this.find((h) => {
+            return h.type === "heading" && test(h);
+        }, index);
+    }
+
+
+    table(test: (element: any) => boolean = () => true, index: number = 0): MDNav {
+        return this.find((h) => {
+            return h.type === "table" && test(h);
+        }, index);
+    }
+
+
+    text(test: (element: any) => boolean = () => true, index: number = 0): MDNav {
+        return this.find((h) => {
+            return h.type === "text" && test(h);
+        }, index);
+    }
+
+
+    tableRow(test: (element: any) => boolean = () => true, index: number = 0): MDNav {
+        return this.find((h) => {
+            return h.type === "tableRow" && test(h);
+        }, index);
+    }
+
+
+    tableCell(test: (element: any) => boolean = () => true, index: number = 0): MDNav {
+        return this.find((h) => {
+            return h.type === "tableCell" && test(h);
+        }, index);
+    }
+
+    get item(): any {
+        if (!this.root || !this.root.children) {
+            return undefined;
+        } else {
+            return this.root.children[this.pos];
+        }
+    }
+
+    get empty(): boolean {
+        return  !this.root ||
+                !this.root.children ||
+                (this.pos >= this.root.children.length);
+    }
+
+    
+    get childNav() {
+        return new MDNav(this.item);
+    }
+}