Upstream ios/web/web_state/ui support classes

ios/web/web_state/ui/crw_debug_web_view.mm

Index: ios/web/web_state/ui/crw_debug_web_view.mm
diff --git a/ios/web/web_state/ui/crw_debug_web_view.mm b/ios/web/web_state/ui/crw_debug_web_view.mm
new file mode 100644
index 0000000000000000000000000000000000000000..4fdb43908ad9c15d9a741c6d286238b8668f2956
--- /dev/null
+++ b/ios/web/web_state/ui/crw_debug_web_view.mm
@@ -0,0 +1,113 @@
+// Copyright 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#if !defined(NDEBUG)
+#import "ios/web/web_state/ui/crw_debug_web_view.h"
+
+#include "base/mac/scoped_nsobject.h"
+
+// These categories define private API in iOS, in reality part of WebKit.
+@interface NSObject (CRWDebugWebView_WebScriptCallFrame_methods)
+- (id)functionName;
+- (id)caller;
+- (id)exception;
+@end
+
+@interface NSObject (CRWDebugWebView_WebView_methods)
+- (void)setScriptDebugDelegate:
+    (id<CRWDebugWebView_WebViewScriptDelegate>)delegate;
+@end
+
+@interface NSObject (CRWDebugWebView_WebScriptObject_methods)
+- (id)callWebScriptMethod:(NSString*)name withArguments:(NSArray*)args;
+@end
+
+#pragma mark -
+
+// The debug implementation of the webscript delegate.
+@interface CRWDebugWebDelegate :
+NSObject<CRWDebugWebView_WebViewScriptDelegate> {
+  base::scoped_nsobject<NSMutableDictionary> _sidsToURLs;
+}
+@end
+
+@implementation CRWDebugWebDelegate
+
+- (id)init {
+  if ((self = [super init])) {
+    _sidsToURLs.reset([[NSMutableDictionary alloc] init]);
+  }
+  return self;
+}
+
+- (void)webView:(WebView*)webView addMessageToConsole:(NSDictionary*)dict {
+  NSLog(@"JS: %@", dict);
+}
+
+- (void)webView:(WebView*)webView
+    didParseSource:(NSString*)source
+    baseLineNumber:(NSUInteger)lineNumber
+           fromURL:(NSURL*)url
+          sourceId:(int)sid
+       forWebFrame:(WebFrame*)webFrame {
+  if (url && sid)
+    [_sidsToURLs setObject:url forKey:[NSNumber numberWithInt:sid]];
+}
+
+- (void)webView:(WebView*)webView
+    failedToParseSource:(NSString*)source
+         baseLineNumber:(unsigned)lineNumber
+                fromURL:(NSURL*)url
+              withError:(NSError*)error
+            forWebFrame:(WebFrame*)webFrame {
+  NSLog(@"JS Failed to parse: url=%@ line=%d error=%@\nsource=%@",
+        url, lineNumber, error, source);
+}
+
+- (void)webView:(WebView*)webView
+    exceptionWasRaised:(WebScriptCallFrame*)frame
+              sourceId:(int)sid
+                  line:(int)lineno
+           forWebFrame:(WebFrame*)webFrame {
+  NSURL* url = [_sidsToURLs objectForKey:[NSNumber numberWithInt:sid]];
+  id representation = [frame exception];
+  if ([representation isKindOfClass:NSClassFromString(@"WebScriptObject")]) {
+    representation =
+        [representation callWebScriptMethod:@"toString" withArguments:nil];
+  }
+  base::scoped_nsobject<NSMutableArray> message([[NSMutableArray alloc] init]);
+
+  [message addObject:
+      [NSString stringWithFormat:@"JS Exception: sid=%d url=%@ exception=%@",
+          sid, url, representation]];
+
+  if ([frame respondsToSelector:@selector(caller)]) {
+    while (frame) {
+      frame = [frame caller];
+      [message addObject:[NSString stringWithFormat:@"line=%d function=%@",
+          lineno, [frame functionName]]];
+    }
+  }
+
+  NSLog(@"%@", [message componentsJoinedByString:@"\n\t"]);
+}
+
+@end
+
+#pragma mark -
+
+@implementation CRWDebugWebView {
+  base::scoped_nsobject<CRWDebugWebDelegate> _webDelegate;
+}
+
+- (void)webView:(id)sender
+    didClearWindowObject:(id)windowObject
+                forFrame:(WebFrame*)frame {
+  if (!_webDelegate)
+    _webDelegate.reset([[CRWDebugWebDelegate alloc] init]);
+  [sender setScriptDebugDelegate:_webDelegate];
+}
+
+@end
+
+#endif  // !defined(NDEBUG)