[iOS] Upstream autofill component code

components/autofill/ios/browser/js_autofill_manager.mm

Index: components/autofill/ios/browser/js_autofill_manager.mm
diff --git a/components/autofill/ios/browser/js_autofill_manager.mm b/components/autofill/ios/browser/js_autofill_manager.mm
new file mode 100644
index 0000000000000000000000000000000000000000..70f6b712f97dae34e24d681ab4a9eb64f883bdb0
--- /dev/null
+++ b/components/autofill/ios/browser/js_autofill_manager.mm
@@ -0,0 +1,103 @@
+// Copyright 2013 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.
+
+#import "components/autofill/ios/browser/js_autofill_manager.h"
+
+#include "base/format_macros.h"
+#include "base/json/string_escape.h"
+#include "base/logging.h"
+#import "ios/web/public/web_state/js/crw_js_early_script_manager.h"
+
+@implementation JsAutofillManager
+
+- (void)fetchFormsWithRequirements:(autofill::RequirementsMask)requirements
+        minimumRequiredFieldsCount:(NSUInteger)requiredFieldsCount
+                 completionHandler:(void (^)(NSString*))completionHandler {
+  DCHECK(completionHandler);
+  // Convert from C++ enum to JS enum.
+  NSString* requirementsJS = nil;
+  switch (requirements) {
+    case autofill::REQUIRE_NONE:
+      requirementsJS = @"__gCrWeb.autofill.REQUIREMENTS_MASK_NONE";
+      break;
+    case autofill::REQUIRE_AUTOCOMPLETE:
+      requirementsJS =
+          @"__gCrWeb.autofill.REQUIREMENTS_MASK_REQUIRE_AUTOCOMPLETE";
+      break;
+  }
+  DCHECK(requirementsJS);
+
+  NSString* extractFormsJS = [NSString
+      stringWithFormat:@"__gCrWeb.autofill.extractForms(%" PRIuNS ", %@);",
+                       requiredFieldsCount, requirementsJS];
+  [self evaluate:extractFormsJS
+      stringResultHandler:^(NSString* result, NSError*) {
+        completionHandler(result);
+      }];
+}
+
+#pragma mark -
+#pragma mark ProtectedMethods
+
+- (NSString*)scriptPath {
+  return @"autofill_controller";
+}
+
+- (NSString*)presenceBeacon {
+  return @"__gCrWeb.autofill";
+}
+
+- (NSArray*)directDependencies {
+  return @[ [CRWJSEarlyScriptManager class] ];
+}
+
+- (void)fillActiveFormField:(NSString*)dataString
+          completionHandler:(ProceduralBlock)completionHandler {
+  web::JavaScriptCompletion resultHandler = ^void(NSString*, NSError*) {
+    completionHandler();
+  };
+
+  NSString* js =
+      [NSString stringWithFormat:@"__gCrWeb.autofill.fillActiveFormField(%@);",
+                                 dataString];
+  [self evaluate:js stringResultHandler:resultHandler];
+}
+
+- (void)fillForm:(NSString*)dataString
+    completionHandler:(ProceduralBlock)completionHandler {
+  DCHECK(completionHandler);
+  NSString* fillFormJS = [NSString
+      stringWithFormat:@"__gCrWeb.autofill.fillForm(%@);", dataString];
+  id stringResultHandler = ^(NSString*, NSError*) {
+    completionHandler();
+  };
+  return [self evaluate:fillFormJS stringResultHandler:stringResultHandler];
+}
+
+- (void)dispatchAutocompleteEvent:(NSString*)formName {
+  NSString* dispatchAutocompleteEventJS = [NSString
+      stringWithFormat:@"__gCrWeb.autofill.dispatchAutocompleteEvent(%s);",
+                       base::GetQuotedJSONString([formName UTF8String])
+                           .c_str()];
+  [self evaluate:dispatchAutocompleteEventJS stringResultHandler:nil];
+}
+
+- (void)dispatchAutocompleteErrorEvent:(NSString*)formName
+                            withReason:(NSString*)reason {
+  NSString* autocompleteErrorJS = [NSString
+      stringWithFormat:
+          @"__gCrWeb.autofill.dispatchAutocompleteErrorEvent(%s, %s);",
+          base::GetQuotedJSONString([formName UTF8String]).c_str(),
+          base::GetQuotedJSONString([reason UTF8String]).c_str()];
+  [self evaluate:autocompleteErrorJS stringResultHandler:nil];
+}
+
+- (void)fillPredictionData:(NSString*)dataString {
+  [self deferredEvaluate:
+            [NSString
+                stringWithFormat:@"__gCrWeb.autofill.fillPredictionData(%@);",
+                                 dataString]];
+}
+
+@end