Fix DialPad and Call Menu buttons not working when a call is fullscreened. (#6496)

This PR:
* Moves the dialpad and hold/transfer menu buttons into the part of the DOM that's included when a call is fullscreen'd.
* Tweaks `ContextMenu` to allow menu content to be mount as a child of the current component, rather than at the root of the DOM (which was not included in the full-screen'd content).

<!-- Please read https://github.com/matrix-org/matrix-js-sdk/blob/develop/CONTRIBUTING.md before submitting your pull request -->

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`Signed-off-by: Andrew Morgan <[email protected]>`

Author: anoadragon453

src/components/structures/ContextMenu.tsx

@@ -80,6 +80,10 @@ export interface IProps extends IPosition {
     managed?: boolean;
     wrapperClassName?: string;
 
+    // If true, this context menu will be mounted as a child to the parent container. Otherwise
+    // it will be mounted to a container at the root of the DOM.
+    mountAsChild?: boolean;
+
     // Function to be called on menu close
     onFinished();
     // on resize callback
@@ -390,7 +394,13 @@ export class ContextMenu extends React.PureComponent<IProps, IState> {
     }
 
     render(): React.ReactChild {
-        return ReactDOM.createPortal(this.renderMenu(), getOrCreateContainer());
+        if (this.props.mountAsChild) {
+            // Render as a child of the current parent
+            return this.renderMenu();
+        } else {
+            // Render as a child of a container at the root of the DOM
+            return ReactDOM.createPortal(this.renderMenu(), getOrCreateContainer());
+        }
     }
 }
 

src/components/views/voip/CallView.tsx

@@ -115,6 +115,7 @@ export default class CallView extends React.Component<IProps, IState> {
     private controlsHideTimer: number = null;
     private dialpadButton = createRef<HTMLDivElement>();
     private contextMenuButton = createRef<HTMLDivElement>();
+    private contextMenu = createRef<HTMLDivElement>();
 
     constructor(props: IProps) {
         super(props);
@@ -545,12 +546,42 @@ export default class CallView extends React.Component<IProps, IState> {
             );
         }
 
+        let dialPad;
+        if (this.state.showDialpad) {
+            dialPad = <DialpadContextMenu
+                {...alwaysAboveRightOf(
+                    this.dialpadButton.current.getBoundingClientRect(),
+                    ChevronFace.None,
+                    CONTEXT_MENU_VPADDING,
+                )}
+                mountAsChild={true}
+                onFinished={this.closeDialpad}
+                call={this.props.call}
+            />;
+        }
+
+        let contextMenu;
+        if (this.state.showMoreMenu) {
+            contextMenu = <CallContextMenu
+                {...alwaysAboveLeftOf(
+                    this.contextMenuButton.current.getBoundingClientRect(),
+                    ChevronFace.None,
+                    CONTEXT_MENU_VPADDING,
+                )}
+                mountAsChild={true}
+                onFinished={this.closeContextMenu}
+                call={this.props.call}
+            />;
+        }
+
         return (
             <div
                 className={callControlsClasses}
                 onMouseEnter={this.onCallControlsMouseEnter}
                 onMouseLeave={this.onCallControlsMouseLeave}
             >
+                { dialPad }
+                { contextMenu }
                 { dialpadButton }
                 <AccessibleButton
                     className={micClasses}
@@ -858,37 +889,9 @@ export default class CallView extends React.Component<IProps, IState> {
             myClassName = 'mx_CallView_pip';
         }
 
-        let dialPad;
-        if (this.state.showDialpad) {
-            dialPad = <DialpadContextMenu
-                {...alwaysAboveRightOf(
-                    this.dialpadButton.current.getBoundingClientRect(),
-                    ChevronFace.None,
-                    CONTEXT_MENU_VPADDING,
-                )}
-                onFinished={this.closeDialpad}
-                call={this.props.call}
-            />;
-        }
-
-        let contextMenu;
-        if (this.state.showMoreMenu) {
-            contextMenu = <CallContextMenu
-                {...alwaysAboveLeftOf(
-                    this.contextMenuButton.current.getBoundingClientRect(),
-                    ChevronFace.None,
-                    CONTEXT_MENU_VPADDING,
-                )}
-                onFinished={this.closeContextMenu}
-                call={this.props.call}
-            />;
-        }
-
         return <div className={"mx_CallView " + myClassName}>
             { header }
             { contentView }
-            { dialPad }
-            { contextMenu }
         </div>;
     }
 }