[terminal] Always open terminal links on touch events

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## v0.15.0
 
+- [terminal] always open terminal links on touchevents (e.g. when tapping a link on iPad) [#6875](https://github.com/eclipse-theia/theia/pull/6875)
+
 Breaking changes:
 
 - [task] renamed method `getStrigifiedTaskSchema()` has been renamed to `getStringifiedTaskSchema()` [#6780](https://github.com/eclipse-theia/theia/pull/6780)

packages/terminal/src/browser/terminal-linkmatcher.ts

@@ -37,16 +37,18 @@ export abstract class AbstractCmdClickTerminalContribution implements TerminalCo
         const validate = this.getValidate(terminalWidget);
         const wrappedHandler = (event: MouseEvent, match: string) => {
             event.preventDefault();
-            if (this.isCommandPressed(event)) {
+            if (this.isCommandPressed(event) || this.wasTouchEvent(event, terminalWidget.lastTouchEndEvent)) {
                 handler(event, match);
             } else {
                 term.focus();
             }
         };
         const matcherId = term.registerLinkMatcher(regexp, wrappedHandler, {
-            willLinkActivate: (event: MouseEvent, uri: string) => this.isCommandPressed(event),
+            willLinkActivate: (event: MouseEvent, uri: string) => this.isCommandPressed(event) || this.wasTouchEvent(event, terminalWidget.lastTouchEndEvent),
             tooltipCallback: (event: MouseEvent, uri: string) => {
-                terminalWidget.showHoverMessage(event.clientX, event.clientY, this.getHoverMessage());
+                if (!this.wasTouchEvent(event, terminalWidget.lastTouchEndEvent)) {
+                    terminalWidget.showHoverMessage(event.clientX, event.clientY, this.getHoverMessage());
+                }
             },
             leaveCallback: (event: MouseEvent, uri: string) => {
                 terminalWidget.hideHover();
@@ -64,6 +66,26 @@ export abstract class AbstractCmdClickTerminalContribution implements TerminalCo
         return isOSX ? event.metaKey : event.ctrlKey;
     }
 
+    protected wasTouchEvent(event: MouseEvent, lastTouchEnd: TouchEvent | undefined): boolean {
+        if (!lastTouchEnd) {
+            return false;
+        }
+        if ((event.timeStamp - lastTouchEnd.timeStamp) > 400) {
+            // A 'touchend' event typically precedes a matching 'click' event by 50ms.
+            return false;
+        }
+        if (Math.abs(event.pageX - (lastTouchEnd as unknown as MouseEvent).pageX) > 5) {
+            // Matching 'touchend' and 'click' events typically have the same page coordinates,
+            // plus or minus 1 pixel.
+            return false;
+        }
+        if (Math.abs(event.pageY - (lastTouchEnd as unknown as MouseEvent).pageY) > 5) {
+            return false;
+        }
+        // We have a match! This link was tapped.
+        return true;
+    }
+
     protected getHoverMessage(): string {
         if (isOSX) {
             return 'Cmd + click to follow link';

packages/terminal/src/browser/terminal-widget-impl.ts

@@ -53,6 +53,7 @@ export class TerminalWidgetImpl extends TerminalWidget implements StatefulWidget
     protected closeOnDispose = true;
     protected waitForConnection: Deferred<MessageConnection> | undefined;
     protected hoverMessage: HTMLDivElement;
+    protected lastTouchEnd: TouchEvent | undefined;
 
     @inject(WorkspaceService) protected readonly workspaceService: WorkspaceService;
     @inject(WebSocketConnectionProvider) protected readonly webSocketConnectionProvider: WebSocketConnectionProvider;
@@ -173,6 +174,16 @@ export class TerminalWidgetImpl extends TerminalWidget implements StatefulWidget
         this.toDispose.push(this.onTermDidClose);
         this.toDispose.push(this.onDidOpenEmitter);
 
+        const touchEndListener = (event: TouchEvent) => {
+            if (this.node.contains(event.target as Node)) {
+                this.lastTouchEnd = event;
+            }
+        };
+        document.addEventListener('touchend', touchEndListener, { passive: true });
+        this.onDispose(() => {
+            document.removeEventListener('touchend', touchEndListener);
+        });
+
         this.toDispose.push(this.term.onSelectionChange(() => {
             if (this.copyOnSelection) {
                 this.copyOnSelectionHandler.copy(this.term.getSelection());
@@ -229,6 +240,10 @@ export class TerminalWidgetImpl extends TerminalWidget implements StatefulWidget
         return this.shellTerminalServer.getProcessId(this.terminalId);
     }
 
+    get lastTouchEndEvent(): TouchEvent | undefined {
+        return this.lastTouchEnd;
+    }
+
     onDispose(onDispose: () => void): void {
         this.toDispose.push(Disposable.create(onDispose));
     }