ios/chrome/browser/autofill/form_suggestion_controller.mm

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #import "ios/chrome/browser/autofill/form_suggestion_controller.h"
   6
   7 #include "base/ios/ios_util.h"
   8 #include "base/ios/weak_nsobject.h"
   9 #include "base/mac/foundation_util.h"
  10 #include "base/mac/scoped_block.h"
  11 #include "base/mac/scoped_nsobject.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/strings/sys_string_conversions.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "components/autofill/core/browser/autofill_popup_delegate.h"
  16 #include "components/autofill/ios/browser/autofill_field_trial_ios.h"
  17 #import "components/autofill/ios/browser/form_suggestion.h"
  18 #import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
  19 #import "ios/chrome/browser/autofill/form_suggestion_provider.h"
  20 #import "ios/chrome/browser/autofill/form_suggestion_view.h"
  21 #import "ios/chrome/browser/passwords/password_generation_utils.h"
  22 #include "ios/chrome/browser/ui/ui_util.h"
  23 #include "ios/web/public/url_scheme_util.h"
  24 #import "ios/web/public/web_state/crw_web_view_proxy.h"
  25 #import "ios/web/public/web_state/js/crw_js_injection_receiver.h"
  26 #import "ios/web/public/web_state/web_state.h"
  27
  28 namespace {
  29
  30 // Struct that describes suggestion state.
  31 struct AutofillSuggestionState {
  32   AutofillSuggestionState(const std::string& form_name,
  33                           const std::string& field_name,
  34                           const std::string& typed_value);
  35   // The name of the form for autofill.
  36   std::string form_name;
  37   // The name of the field for autofill.
  38   std::string field_name;
  39   // The user-typed value in the field.
  40   std::string typed_value;
  41   // The suggestions for the form field. An array of |FormSuggestion|.
  42   base::scoped_nsobject<NSArray> suggestions;
  43 };
  44
  45 AutofillSuggestionState::AutofillSuggestionState(const std::string& form_name,
  46                                                  const std::string& field_name,
  47                                                  const std::string& typed_value)
  48     : form_name(form_name), field_name(field_name), typed_value(typed_value) {
  49 }
  50
  51 }  // namespace
  52
  53 @interface FormSuggestionController () <FormInputAccessoryViewProvider> {
  54   // Form navigation delegate.
  55   base::WeakNSProtocol<id<FormInputAccessoryViewDelegate>> _delegate;
  56
  57   // Callback to update the accessory view.
  58   base::mac::ScopedBlock<AccessoryViewReadyCompletion>
  59       accessoryViewUpdateBlock_;
  60
  61   // Autofill suggestion state.
  62   scoped_ptr<AutofillSuggestionState> _suggestionState;
  63
  64   // Providers for suggestions, sorted according to the order in which
  65   // they should be asked for suggestions, with highest priority in front.
  66   base::scoped_nsobject<NSArray> _suggestionProviders;
  67
  68   // Access to WebView from the CRWWebController.
  69   base::scoped_nsprotocol<id<CRWWebViewProxy>> _webViewProxy;
  70 }
  71
  72 // Returns an autoreleased input accessory view that shows |suggestions|.
  73 - (UIView*)suggestionViewWithSuggestions:(NSArray*)suggestions;
  74
  75 // Updates keyboard for |suggestionState|.
  76 - (void)updateKeyboard:(AutofillSuggestionState*)suggestionState;
  77
  78 // Updates keyboard with |suggestions|.
  79 - (void)updateKeyboardWithSuggestions:(NSArray*)suggestions;
  80
  81 // Clears state in between page loads.
  82 - (void)resetSuggestionState;
  83
  84 // Finds a FormSuggestionProvider that can supply suggestions for the specified
  85 // form, requests them, and updates the view accordingly.
  86 - (void)retrieveSuggestionsForFormNamed:(const std::string&)formName
  87                               fieldName:(const std::string&)fieldName
  88                                    type:(const std::string&)type
  89                                webState:(web::WebState*)webState;
  90
  91 @end
  92
  93 @implementation FormSuggestionController {
  94   // Bridge to observe the web state from Objective-C.
  95   scoped_ptr<web::WebStateObserverBridge> _webStateObserverBridge;
  96
  97   // Manager for FormSuggestion JavaScripts.
  98   base::scoped_nsobject<JsSuggestionManager> _jsSuggestionManager;
  99
 100   // The provider for the current set of suggestions.
 101   __weak id<FormSuggestionProvider> _provider;
 102 }
 103
 104 - (instancetype)initWithWebState:(web::WebState*)webState
 105                        providers:(NSArray*)providers
 106              JsSuggestionManager:(JsSuggestionManager*)jsSuggestionManager {
 107   self = [super init];
 108   if (self) {
 109     _webStateObserverBridge.reset(
 110         new web::WebStateObserverBridge(webState, self));
 111     _webViewProxy.reset([webState->GetWebViewProxy() retain]);
 112     _jsSuggestionManager.reset([jsSuggestionManager retain]);
 113     _suggestionProviders.reset([providers copy]);
 114   }
 115   return self;
 116 }
 117
 118 - (instancetype)initWithWebState:(web::WebState*)webState
 119                        providers:(NSArray*)providers {
 120   JsSuggestionManager* jsSuggestionManager =
 121       base::mac::ObjCCast<JsSuggestionManager>(
 122           [webState->GetJSInjectionReceiver()
 123               instanceOfClass:[JsSuggestionManager class]]);
 124   return [self initWithWebState:webState
 125                       providers:providers
 126             JsSuggestionManager:jsSuggestionManager];
 127 }
 128
 129 - (void)detachFromWebState {
 130   _webStateObserverBridge.reset();
 131 }
 132
 133 #pragma mark -
 134 #pragma mark CRWWebStateObserver
 135
 136 - (void)webStateDestroyed:(web::WebState*)webState {
 137   [self detachFromWebState];
 138 }
 139
 140 - (void)webStateDidLoadPage:(web::WebState*)webState {
 141   [self processPage:webState];
 142 }
 143
 144 - (void)processPage:(web::WebState*)webState {
 145   [self resetSuggestionState];
 146
 147   web::URLVerificationTrustLevel trustLevel =
 148       web::URLVerificationTrustLevel::kNone;
 149   const GURL pageURL(webState->GetCurrentURL(&trustLevel));
 150   if (trustLevel != web::URLVerificationTrustLevel::kAbsolute) {
 151     DLOG(WARNING) << "Page load not handled on untrusted page";
 152     return;
 153   }
 154
 155   if (web::UrlHasWebScheme(pageURL) && webState->ContentIsHTML())
 156     [_jsSuggestionManager inject];
 157 }
 158
 159 - (void)setWebViewProxy:(id<CRWWebViewProxy>)webViewProxy {
 160   _webViewProxy.reset([webViewProxy retain]);
 161 }
 162
 163 - (void)retrieveSuggestionsForFormNamed:(const std::string&)formName
 164                               fieldName:(const std::string&)fieldName
 165                                    type:(const std::string&)type
 166                                webState:(web::WebState*)webState {
 167   base::WeakNSObject<FormSuggestionController> weakSelf(self);
 168   base::scoped_nsobject<NSString> strongFormName(
 169       [base::SysUTF8ToNSString(formName) copy]);
 170   base::scoped_nsobject<NSString> strongFieldName(
 171       [base::SysUTF8ToNSString(fieldName) copy]);
 172   base::scoped_nsobject<NSString> strongType(
 173       [base::SysUTF8ToNSString(type) copy]);
 174   base::scoped_nsobject<NSString> strongValue(
 175       [base::SysUTF8ToNSString(_suggestionState.get()->typed_value) copy]);
 176
 177   // Build a block for each provider that will invoke its completion with YES
 178   // if the provider can provide suggestions for the specified form/field/type
 179   // and NO otherwise.
 180   base::scoped_nsobject<NSMutableArray> findProviderBlocks(
 181       [[NSMutableArray alloc] init]);
 182   for (NSUInteger i = 0; i < [_suggestionProviders count]; i++) {
 183     base::mac::ScopedBlock<passwords::PipelineBlock> block(
 184         ^(void (^completion)(BOOL success)) {
 185           // Access all the providers through |self| to guarantee that both
 186           // |self| and all the providers exist when the block is executed.
 187           // |_suggestionProviders| is immutable, so the subscripting is
 188           // always valid.
 189           base::scoped_nsobject<FormSuggestionController> strongSelf(
 190               [weakSelf retain]);
 191           if (!strongSelf)
 192             return;
 193           id<FormSuggestionProvider> provider =
 194               strongSelf.get()->_suggestionProviders[i];
 195           [provider checkIfSuggestionsAvailableForForm:strongFormName
 196                                                  field:strongFieldName
 197                                                   type:strongType
 198                                             typedValue:strongValue
 199                                               webState:webState
 200                                      completionHandler:completion];
 201         },
 202         base::scoped_policy::RETAIN);
 203     [findProviderBlocks addObject:block];
 204   }
 205
 206   // Once the suggestions are retrieved, update the suggestions UI.
 207   SuggestionsReadyCompletion readyCompletion =
 208       ^(NSArray* suggestions, id<FormSuggestionProvider> provider) {
 209         [weakSelf onSuggestionsReady:suggestions provider:provider];
 210       };
 211
 212   // Once a provider is found, use it to retrieve suggestions.
 213   passwords::PipelineCompletionBlock completion = ^(NSUInteger providerIndex) {
 214     if (providerIndex == NSNotFound)
 215       return;
 216     base::scoped_nsobject<FormSuggestionController> strongSelf(
 217         [weakSelf retain]);
 218     if (!strongSelf)
 219       return;
 220     id<FormSuggestionProvider> provider =
 221         strongSelf.get()->_suggestionProviders[providerIndex];
 222     [provider retrieveSuggestionsForForm:strongFormName
 223                                    field:strongFieldName
 224                                     type:strongType
 225                               typedValue:strongValue
 226                                 webState:webState
 227                        completionHandler:readyCompletion];
 228   };
 229
 230   // Run all the blocks in |findProviderBlocks| until one invokes its
 231   // completion with YES. The first one to do so will be passed to
 232   // |onProviderFound|.
 233   passwords::RunSearchPipeline(findProviderBlocks, completion);
 234 }
 235
 236 - (void)onSuggestionsReady:(NSArray*)suggestions
 237                   provider:(id<FormSuggestionProvider>)provider {
 238   // TODO(ios): crbug.com/249916. If we can also pass in the form/field for
 239   // which |sugguestions| are, we should check here if |suggestions| are for
 240   // the current active element. If not, reset |_suggestionState|.
 241   if (!_suggestionState) {
 242     // The suggestion state was reset in between the call to Autofill API (e.g.
 243     // OnQueryFormFieldAutofill) and this method being called back. Results are
 244     // therefore no longer relevant.
 245     return;
 246   }
 247
 248   _provider = provider;
 249   _suggestionState->suggestions.reset([suggestions copy]);
 250   [self updateKeyboard:_suggestionState.get()];
 251 }
 252
 253 - (void)resetSuggestionState {
 254   _provider = nil;
 255   _suggestionState.reset();
 256 }
 257
 258 - (void)clearSuggestions {
 259   // Note that other parts of the suggestionsState are not reset.
 260   if (!_suggestionState.get())
 261     return;
 262   _suggestionState->suggestions.reset([[NSArray alloc] init]);
 263   [self updateKeyboard:_suggestionState.get()];
 264 }
 265
 266 - (void)updateKeyboard:(AutofillSuggestionState*)suggestionState {
 267   if (!suggestionState) {
 268     if (accessoryViewUpdateBlock_)
 269       accessoryViewUpdateBlock_.get()(nil, self);
 270   } else {
 271     [self updateKeyboardWithSuggestions:suggestionState->suggestions];
 272   }
 273 }
 274
 275 - (void)updateKeyboardWithSuggestions:(NSArray*)suggestions {
 276   if (accessoryViewUpdateBlock_) {
 277     accessoryViewUpdateBlock_.get()(
 278         [self suggestionViewWithSuggestions:suggestions], self);
 279   }
 280 }
 281
 282 - (UIView*)suggestionViewWithSuggestions:(NSArray*)suggestions {
 283   CGRect frame = [_webViewProxy getKeyboardAccessory].frame;
 284   // Force the desired height on iPads running iOS 9 or later where the height
 285   // of the inputAccessoryView is 0.
 286   if (base::ios::IsRunningOnIOS9OrLater() && IsIPadIdiom()) {
 287     frame.size.height = autofill::kInputAccessoryHeight;
 288   }
 289   base::scoped_nsobject<FormSuggestionView> view([[FormSuggestionView alloc]
 290       initWithFrame:frame
 291              client:self
 292         suggestions:suggestions]);
 293   return view.autorelease();
 294 }
 295
 296 - (void)didSelectSuggestion:(FormSuggestion*)suggestion {
 297   if (!_suggestionState)
 298     return;
 299
 300   // Send the suggestion to the provider. Upon completion advance the cursor
 301   // for single-field Autofill, or close the keyboard for full-form Autofill.
 302   base::WeakNSObject<FormSuggestionController> weakSelf(self);
 303   [_provider
 304       didSelectSuggestion:suggestion
 305                  forField:base::SysUTF8ToNSString(_suggestionState->field_name)
 306                      form:base::SysUTF8ToNSString(_suggestionState->form_name)
 307         completionHandler:^{
 308           if (autofill::AutofillFieldTrialIOS::IsFullFormAutofillEnabled()) {
 309             [[weakSelf accessoryViewDelegate] closeKeyboardWithoutButtonPress];
 310           } else {
 311             [[weakSelf accessoryViewDelegate]
 312                 selectNextElementWithoutButtonPress];
 313           }
 314         }];
 315   _provider = nil;
 316 }
 317
 318 - (id<FormInputAccessoryViewProvider>)accessoryViewProvider {
 319   return self;
 320 }
 321
 322 #pragma mark FormInputAccessoryViewProvider
 323
 324 - (id<FormInputAccessoryViewDelegate>)accessoryViewDelegate {
 325   return _delegate.get();
 326 }
 327
 328 - (void)setAccessoryViewDelegate:(id<FormInputAccessoryViewDelegate>)delegate {
 329   _delegate.reset(delegate);
 330 }
 331
 332 - (void)
 333     checkIfAccessoryViewIsAvailableForFormNamed:(const std::string&)formName
 334                                       fieldName:(const std::string&)fieldName
 335                                        webState:(web::WebState*)webState
 336                               completionHandler:
 337                                   (AccessoryViewAvailableCompletion)
 338                                       completionHandler {
 339   [self processPage:webState];
 340   completionHandler(YES);
 341 }
 342
 343 - (void)retrieveAccessoryViewForFormNamed:(const std::string&)formName
 344                                 fieldName:(const std::string&)fieldName
 345                                     value:(const std::string&)value
 346                                      type:(const std::string&)type
 347                                  webState:(web::WebState*)webState
 348                  accessoryViewUpdateBlock:
 349                      (AccessoryViewReadyCompletion)accessoryViewUpdateBlock {
 350   _suggestionState.reset(
 351       new AutofillSuggestionState(formName, fieldName, value));
 352   accessoryViewUpdateBlock([self suggestionViewWithSuggestions:@[]], self);
 353   accessoryViewUpdateBlock_.reset([accessoryViewUpdateBlock copy]);
 354   [self retrieveSuggestionsForFormNamed:formName
 355                               fieldName:fieldName
 356                                    type:type
 357                                webState:webState];
 358 }
 359
 360 - (void)inputAccessoryViewControllerDidReset:
 361         (FormInputAccessoryViewController*)controller {
 362   accessoryViewUpdateBlock_.reset();
 363   [self resetSuggestionState];
 364 }
 365
 366 - (void)resizeAccessoryView {
 367   [self updateKeyboard:_suggestionState.get()];
 368 }
 369
 370 - (BOOL)getLogKeyboardAccessoryMetrics {
 371   return YES;
 372 }
 373
 374 @end