Restore DimensionLayer with BFS algorithm and usage of getAbsolutePosition

src/Components/SVG/Elements/Container.tsx

@@ -2,7 +2,7 @@ import * as React from 'react';
 import { Interweave, Node } from 'interweave';
 import { XPositionReference } from '../../../Enums/XPositionReference';
 import { IContainerModel } from '../../../Interfaces/IContainerModel';
-import { DIMENSION_MARGIN } from '../../../utils/default';
+import { DIMENSION_MARGIN, SHOW_CHILDREN_DIMENSIONS, SHOW_PARENT_DIMENSION } from '../../../utils/default';
 import { getDepth } from '../../../utils/itertools';
 import { Dimension } from './Dimension';
 import IProperties from '../../../Interfaces/IProperties';
@@ -54,7 +54,7 @@ export const Container: React.FC<IContainerProps> = (props: IContainerProps) =>
   const text = (props.model.properties.width ?? 0).toString();
 
   let dimensionChildren: JSX.Element | null = null;
-  if (props.model.children.length > 1) {
+  if (props.model.children.length > 1 && SHOW_CHILDREN_DIMENSIONS) {
     const {
       childrenId,
       xChildrenStart,
@@ -79,15 +79,18 @@ export const Container: React.FC<IContainerProps> = (props: IContainerProps) =>
       transform={transform}
       key={`container-${props.model.properties.id}`}
     >
-      <Dimension
-        id={id}
-        xStart={xStart}
-        xEnd={xEnd}
-        yStart={y}
-        yEnd={y}
-        strokeWidth={strokeWidth}
-        text={text}
-      />
+      { SHOW_PARENT_DIMENSION
+        ? <Dimension
+          id={id}
+          xStart={xStart}
+          xEnd={xEnd}
+          yStart={y}
+          yEnd={y}
+          strokeWidth={strokeWidth}
+          text={text}
+        />
+        : null
+      }
       { dimensionChildren }
       { svg }
       <text

src/Components/SVG/Elements/DimensionLayer.tsx

@@ -0,0 +1,57 @@
+import * as React from 'react';
+import { ContainerModel } from '../../../Interfaces/IContainerModel';
+import { DIMENSION_MARGIN } from '../../../utils/default';
+import { getAbsolutePosition, MakeBFSIterator } from '../../../utils/itertools';
+import { transformX } from './Container';
+import { Dimension } from './Dimension';
+
+interface IDimensionLayerProps {
+  roots: ContainerModel | ContainerModel[] | null
+}
+
+const getDimensionsNodes = (root: ContainerModel): React.ReactNode[] => {
+  const it = MakeBFSIterator(root);
+  const dimensions: React.ReactNode[] = [];
+  for (const { container, depth } of it) {
+    const width = container.properties.width;
+    const id = `dim-${container.properties.id}`;
+    const xStart = getAbsolutePosition(container)[0];
+    const xEnd = xStart + width;
+    const y = (container.properties.y + container.properties.height) + (DIMENSION_MARGIN * (depth + 1));
+    const strokeWidth = 1;
+    const text = width.toString();
+    dimensions.push(
+      <Dimension
+        id={id}
+        xStart={xStart}
+        yStart={y}
+        xEnd={xEnd}
+        yEnd={y}
+        strokeWidth={strokeWidth}
+        text={text}
+      />
+    );
+  }
+  return dimensions;
+};
+
+/**
+ * A layer containing all dimension
+ * @param props
+ * @returns
+ */
+export const DimensionLayer: React.FC<IDimensionLayerProps> = (props: IDimensionLayerProps) => {
+  let dimensions: React.ReactNode[] = [];
+  if (Array.isArray(props.roots)) {
+    props.roots.forEach(child => {
+      dimensions.concat(getDimensionsNodes(child));
+    });
+  } else if (props.roots !== null) {
+    dimensions = getDimensionsNodes(props.roots);
+  }
+  return (
+    <g>
+      { dimensions }
+    </g>
+  );
+};

src/Components/SVG/SVG.tsx

@@ -4,6 +4,7 @@ import { Container } from './Elements/Container';
 import { ContainerModel } from '../../Interfaces/IContainerModel';
 import { Selector } from './Elements/Selector';
 import { BAR_WIDTH } from '../Bar/Bar';
+import { DimensionLayer } from './Elements/DimensionLayer';
 
 interface ISVGProps {
   width: number
@@ -74,6 +75,7 @@ export const SVG: React.FC<ISVGProps> = (props: ISVGProps) => {
         <svg {...properties}>
           { children }
           <Selector selected={props.selected} />
+          <DimensionLayer roots={props.children}/>
         </svg>
       </UncontrolledReactSVGPanZoom>
     </div>

src/utils/default.ts

@@ -4,6 +4,17 @@ import { IConfiguration } from '../Interfaces/IConfiguration';
 import { IContainerModel } from '../Interfaces/IContainerModel';
 import IProperties from '../Interfaces/IProperties';
 
+/// DIMENSIONS DEFAULTS ///
+
+export const SHOW_PARENT_DIMENSION = true;
+export const SHOW_CHILDREN_DIMENSIONS = true;
+export const DIMENSION_MARGIN = 50;
+export const NOTCHES_LENGTH = 4;
+
+/// EDITOR DEFAULTS ///
+
+export const MAX_HISTORY = 200;
+
 export const DEFAULT_CONFIG: IConfiguration = {
   AvailableContainers: [
     {
@@ -67,8 +78,3 @@ export const GetDefaultContainerProps = (
   style: containerConfig.Style,
   userData: containerConfig.UserData
 });
-
-export const DIMENSION_MARGIN = 50;
-export const NOTCHES_LENGTH = 4;
-
-export const MAX_HISTORY = 200;

src/utils/itertools.ts

@@ -22,6 +22,34 @@ export function * MakeIterator(root: IContainerModel): Generator<IContainerModel
   }
 }
 
+export interface ContainerAndDepth {
+  container: IContainerModel
+  depth: number
+}
+/**
+ * Returns a Generator iterating of over the children depth-first
+ */
+export function * MakeBFSIterator(root: IContainerModel): Generator<ContainerAndDepth, void, unknown> {
+  const queue: IContainerModel[] = [root];
+  let depth = 0;
+  while (queue.length > 0) {
+    let levelSize = queue.length;
+    while (levelSize-- !== 0) {
+      const container = queue.shift() as IContainerModel;
+      yield {
+        container,
+        depth
+      };
+
+      for (let i = container.children.length - 1; i >= 0; i--) {
+        const child = container.children[i];
+        queue.push(child);
+      }
+    }
+    depth++;
+  }
+}
+
 /**
  * Returns the depth of the container
  * @returns The depth of the container