[iOS][ContextMenu] Add support for preview provider

This CL adds support for passing PreviewProvider to the WebState
delegate.

Bug: 1140387
Change-Id: I4c4a2665e26875be9d262d884aa96d3cef205af2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587027
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842156}

ios/chrome/browser/ui/browser_view/browser_view_controller.mm

@@ -3639,6 +3639,8 @@ NSString* const kBrowserViewControllerSnackbarCategory =
 
 - (void)webState:(web::WebState*)webState
     contextMenuConfigurationForParams:(const web::ContextMenuParams&)params
+                      previewProvider:
+                          (UIContextMenuContentPreviewProvider)previewProvider
                     completionHandler:
                         (void (^)(UIContextMenuConfiguration*))completionHandler
     API_AVAILABLE(ios(13.0)) {

ios/web/public/web_state_delegate.h

@@ -96,10 +96,12 @@ class WebStateDelegate {
 
   // Called when iOS13+ context menu is triggered and now it is required to
   // provide a UIContextMenuConfiguration to |completion_handler| to generate
-  // the context menu.
+  // the context menu. |previewProvider| is used to show a custom ViewController
+  // to preview the page.
   virtual void ContextMenuConfiguration(
       WebState* source,
       const ContextMenuParams& params,
+      UIContextMenuContentPreviewProvider preview_provider,
       void (^completion_handler)(UIContextMenuConfiguration*))
       API_AVAILABLE(ios(13.0));
   // Called when iOS13+ context menu is ready to be showed.

ios/web/public/web_state_delegate_bridge.h

@@ -84,9 +84,12 @@
 
 // Called when iOS13+ context menu is triggered and now it is required to
 // provide a UIContextMenuConfiguration to |completion_handler| to generate the
-// context menu.
+// context menu. |previewProvider| is used to show a custom ViewController to
+// preview the page.
 - (void)webState:(web::WebState*)webState
     contextMenuConfigurationForParams:(const web::ContextMenuParams&)params
+                      previewProvider:
+                          (UIContextMenuContentPreviewProvider)previewProvider
                     completionHandler:
                         (void (^)(UIContextMenuConfiguration*))completionHandler
     API_AVAILABLE(ios(13.0));
@@ -147,6 +150,7 @@ class WebStateDelegateBridge : public web::WebStateDelegate {
   void ContextMenuConfiguration(
       WebState* source,
       const ContextMenuParams& params,
+      UIContextMenuContentPreviewProvider preview_provider,
       void (^completion_handler)(UIContextMenuConfiguration*))
       API_AVAILABLE(ios(13.0)) override;
   void ContextMenuDidEnd(WebState* source, const GURL& link_url)

ios/web/web_state/ui/crw_context_menu_controller.mm

@@ -146,13 +146,16 @@ const CGFloat kJavaScriptTimeout = 1;
   // delegate's methods.
   [interaction.view addSubview:self.highlightView];
   [interaction.view addSubview:self.dismissView];
+  self.highlightView.center = location;
+  self.dismissView.center = location;
 
   self.params.location = [self.webView convertPoint:location
                                            fromView:interaction.view];
 
   __block UIContextMenuConfiguration* configuration;
   self.webState->GetDelegate()->ContextMenuConfiguration(
-      self.webState, self.params, ^(UIContextMenuConfiguration* conf) {
+      self.webState, self.params, /*preview_provider=*/nil,
+      ^(UIContextMenuConfiguration* conf) {
         configuration = conf;
       });
 

ios/web/web_state/ui/crw_wk_ui_handler.mm

@@ -210,8 +210,8 @@
   web::ContextMenuParams params;
   params.link_url = net::GURLWithNSURL(elementInfo.linkURL);
 
-  delegate->ContextMenuConfiguration(self.webStateImpl, params,
-                                     completionHandler);
+  delegate->ContextMenuConfiguration(
+      self.webStateImpl, params, /*preview_provider=*/nil, completionHandler);
 }
 
 #endif  // End of >iOS13 deprecated block.

ios/web/web_state/web_state_context_menu_bridge_unittest.mm

@@ -31,6 +31,8 @@
 
 - (void)webState:(web::WebState*)webState
     contextMenuConfigurationForParams:(const web::ContextMenuParams&)params
+                      previewProvider:
+                          (UIContextMenuContentPreviewProvider)previewProvider
                     completionHandler:
                         (void (^)(UIContextMenuConfiguration*))completionHandler
     API_AVAILABLE(ios(13.0)) {

ios/web/web_state/web_state_delegate.mm

@@ -87,6 +87,7 @@ void WebStateDelegate::Detach(WebState* source) {
 void WebStateDelegate::ContextMenuConfiguration(
     WebState* source,
     const ContextMenuParams& params,
+    UIContextMenuContentPreviewProvider preview_provider,
     void (^completion_handler)(UIContextMenuConfiguration*))
     API_AVAILABLE(ios(13.0)) {
   completion_handler(nil);

ios/web/web_state/web_state_delegate_bridge.mm

@@ -141,13 +141,16 @@ UIView* WebStateDelegateBridge::GetWebViewContainer(WebState* source) {
 void WebStateDelegateBridge::ContextMenuConfiguration(
     WebState* source,
     const ContextMenuParams& params,
+    UIContextMenuContentPreviewProvider preview_provider,
     void (^completion_handler)(UIContextMenuConfiguration*))
     API_AVAILABLE(ios(13.0)) {
   if ([delegate_ respondsToSelector:@selector
                  (webState:
-                     contextMenuConfigurationForParams:completionHandler:)]) {
+                     contextMenuConfigurationForParams:previewProvider
+                                                      :completionHandler:)]) {
     [delegate_ webState:source
         contextMenuConfigurationForParams:params
+                          previewProvider:preview_provider
                         completionHandler:completion_handler];
   } else {
     completion_handler(nil);

ios/web_view/internal/cwv_web_view.mm

@@ -524,6 +524,8 @@ BOOL gChromeLongPressAndForceTouchHandlingEnabled = YES;
 
 - (void)webState:(web::WebState*)webState
     contextMenuConfigurationForParams:(const web::ContextMenuParams&)params
+                      previewProvider:
+                          (UIContextMenuContentPreviewProvider)previewProvider
                     completionHandler:
                         (void (^)(UIContextMenuConfiguration*))completionHandler
     API_AVAILABLE(ios(13.0)) {