// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "ios/web/web_state/ui/crw_web_controller.h"
#import <WebKit/WebKit.h>
#import "base/apple/foundation_util.h"
#import "base/containers/contains.h"
#import "base/feature_list.h"
#import "base/functional/bind.h"
#import "base/ios/block_types.h"
#import "base/ios/ios_util.h"
#import "base/json/string_escape.h"
#import "base/metrics/histogram_functions.h"
#import "base/metrics/user_metrics.h"
#import "base/metrics/user_metrics_action.h"
#import "base/strings/sys_string_conversions.h"
#import "build/branding_buildflags.h"
#import "ios/web/common/annotations_utils.h"
#import "ios/web/common/crw_input_view_provider.h"
#import "ios/web/common/crw_web_view_content_view.h"
#import "ios/web/common/features.h"
#import "ios/web/common/uikit_ui_util.h"
#import "ios/web/common/url_util.h"
#import "ios/web/download/crw_web_view_download.h"
#import "ios/web/find_in_page/java_script_find_in_page_manager_impl.h"
#import "ios/web/history_state_util.h"
#import "ios/web/js_features/scroll_helper/scroll_helper_java_script_feature.h"
#import "ios/web/js_messaging/java_script_feature_util_impl.h"
#import "ios/web/js_messaging/web_view_js_utils.h"
#import "ios/web/js_messaging/web_view_web_state_map.h"
#import "ios/web/navigation/crw_error_page_helper.h"
#import "ios/web/navigation/crw_js_navigation_handler.h"
#import "ios/web/navigation/crw_navigation_item_holder.h"
#import "ios/web/navigation/crw_web_view_navigation_observer.h"
#import "ios/web/navigation/crw_web_view_navigation_observer_delegate.h"
#import "ios/web/navigation/crw_wk_navigation_handler.h"
#import "ios/web/navigation/crw_wk_navigation_states.h"
#import "ios/web/navigation/navigation_context_impl.h"
#import "ios/web/navigation/wk_back_forward_list_item_holder.h"
#import "ios/web/navigation/wk_navigation_util.h"
#import "ios/web/public/annotations/annotations_text_manager.h"
#import "ios/web/public/browser_state.h"
#import "ios/web/public/find_in_page/crw_find_interaction.h"
#import "ios/web/public/permissions/permissions.h"
#import "ios/web/public/ui/crw_web_view_scroll_view_proxy.h"
#import "ios/web/public/web_client.h"
#import "ios/web/security/crw_cert_verification_controller.h"
#import "ios/web/security/crw_ssl_status_updater.h"
#import "ios/web/text_fragments/text_fragments_manager_impl.h"
#import "ios/web/web_state/crw_web_view.h"
#import "ios/web/web_state/ui/crw_context_menu_controller.h"
#import "ios/web/web_state/ui/crw_web_controller_container_view.h"
#import "ios/web/web_state/ui/crw_web_request_controller.h"
#import "ios/web/web_state/ui/crw_web_view_proxy_impl.h"
#import "ios/web/web_state/ui/crw_wk_ui_handler.h"
#import "ios/web/web_state/ui/crw_wk_ui_handler_delegate.h"
#import "ios/web/web_state/ui/wk_web_view_configuration_provider.h"
#import "ios/web/web_state/user_interaction_state.h"
#import "ios/web/web_state/web_state_impl.h"
#import "ios/web/web_state/web_view_internal_creation_util.h"
#import "ios/web/web_view/content_type_util.h"
#import "ios/web/web_view/wk_web_view_util.h"
#import "net/base/apple/url_conversions.h"
#import "services/metrics/public/cpp/ukm_builders.h"
#import "url/gurl.h"
using web::NavigationManager;
using web::NavigationManagerImpl;
using web::WebState;
using web::WebStateImpl;
using web::wk_navigation_util::IsRestoreSessionUrl;
using web::wk_navigation_util::IsWKInternalUrl;
namespace {
char const kFullScreenStateHistogram[] = "IOS.Fullscreen.State";
// Disables logic to update CRWWebController's `_currentURLLoadWasTriggered`
// when setting a WKWebView's interaction state.
BASE_FEATURE(kIOSSessionRestoreLoadTriggerKillSwitch,
"IOSSessionRestoreLoadTriggerKillSwitch",
base::FEATURE_DISABLED_BY_DEFAULT);
} // namespace
// TODO(crbug.com/40746865): Allow usage of iOS15 interactionState on iOS 14 SDK
// based builds.
#if !defined(__IPHONE_15_0) || __IPHONE_OS_VERSION_MAX_ALLOWED < __IPHONE_15_0
@interface WKWebView (Additions)
@property(nonatomic, nullable, copy) id interactionState;
@end
#endif
@interface CRWWebController () <CRWWKNavigationHandlerDelegate,
CRWInputViewProvider,
CRWSSLStatusUpdaterDataSource,
CRWSSLStatusUpdaterDelegate,
CRWWebControllerContainerViewDelegate,
CRWWebViewNavigationObserverDelegate,
CRWWebRequestControllerDelegate,
CRWWebViewScrollViewProxyObserver,
CRWWKNavigationHandlerDelegate,
CRWWKUIHandlerDelegate,
UIDropInteractionDelegate,
WKNavigationDelegate> {
// The view used to display content. Must outlive `_webViewProxy`. The
// container view should be accessed through this property rather than
// `self.view` from within this class, as `self.view` triggers creation while
// `self.containerView` will return nil if the view hasn't been instantiated.
CRWWebControllerContainerView* _containerView;
// YES if the current URL load was triggered in Web Controller. NO by default
// and after web usage was disabled. Used by `-loadCurrentURLIfNecessary` to
// prevent extra loads.
BOOL _currentURLLoadWasTrigerred;
BOOL _isBeingDestroyed; // YES if in the process of closing.
// The actual URL of the document object (i.e., the last committed URL).
// TODO(crbug.com/41213672): Remove this in favor of just updating the
// navigation manager and treating that as authoritative.
GURL _documentURL;
// Actions to execute once the page load is complete.
NSMutableArray* _pendingLoadCompleteActions;
// Flag to say if browsing is enabled.
BOOL _webUsageEnabled;
// Default URL (about:blank).
GURL _defaultURL;
// Updates SSLStatus for current navigation item.
CRWSSLStatusUpdater* _SSLStatusUpdater;
// Controller used for certs verification to help with blocking requests with
// bad SSL cert, presenting SSL interstitials and determining SSL status for
// Navigation Items.
CRWCertVerificationController* _certVerificationController;
// State of user interaction with web content.
web::UserInteractionState _userInteractionState;
}
// The WKNavigationDelegate handler class.
@property(nonatomic, readonly, strong)
CRWWKNavigationHandler* navigationHandler;
@property(nonatomic, readonly, strong)
CRWJSNavigationHandler* jsNavigationHandler;
// The WKUIDelegate handler class.
@property(nonatomic, readonly, strong) CRWWKUIHandler* UIHandler;
// YES if in the process of closing.
@property(nonatomic, readwrite, assign) BOOL beingDestroyed;
// If `contentView_` contains a web view, this is the web view it contains.
// If not, it's nil. When setting the property, it performs basic setup.
@property(weak, nonatomic) WKWebView* webView;
// The scroll view of `webView`.
@property(weak, nonatomic, readonly) UIScrollView* webScrollView;
@property(nonatomic, strong, readonly)
CRWWebViewNavigationObserver* webViewNavigationObserver;
// Dictionary where keys are the names of WKWebView properties and values are
// selector names which should be called when a corresponding property has
// changed. e.g. @{ @"URL" : @"webViewURLDidChange" } means that
// -[self webViewURLDidChange] must be called every time when WKWebView.URL is
// changed.
@property(weak, nonatomic, readonly) NSDictionary* WKWebViewObservers;
// Url request controller.
@property(nonatomic, strong, readonly)
CRWWebRequestController* requestController;
@property(nonatomic, readonly) web::WebState* webState;
// WebStateImpl instance associated with this CRWWebController, web controller
// does not own this pointer.
@property(nonatomic, readonly) web::WebStateImpl* webStateImpl;
// Returns the x, y offset the content has been scrolled.
@property(nonatomic, readonly) CGPoint scrollPosition;
// The touch tracking recognizer allowing us to decide if a navigation has user
// gesture. Lazily created.
@property(nonatomic, strong, readonly)
CRWTouchTrackingRecognizer* touchTrackingRecognizer;
// A custom drop interaction that is added alongside the web view's default drop
// interaction.
@property(nonatomic, strong) UIDropInteraction* customDropInteraction;
// Session Information
// -------------------
// The associated NavigationManagerImpl.
@property(nonatomic, readonly) NavigationManagerImpl* navigationManagerImpl;
// TODO(crbug.com/40506829): Remove these functions and replace with more
// appropriate NavigationItem getters.
// Returns the navigation item for the current page.
@property(nonatomic, readonly) web::NavigationItemImpl* currentNavItem;
// ContextMenu controller, handling the interactions with the context menu.
@property(nonatomic, strong) CRWContextMenuController* contextMenuController;
// Called following navigation completion to generate final navigation lifecycle
// events. Navigation is considered complete when the document has finished
// loading, or when other page load mechanics are completed on a
// non-document-changing URL change.
- (void)didFinishNavigation:(web::NavigationContextImpl*)context;
// Update the appropriate parts of the model and broadcast to the embedder. This
// may be called multiple times and thus must be idempotent.
- (void)loadCompleteWithSuccess:(BOOL)loadSuccess
forContext:(web::NavigationContextImpl*)context;
// Finds all the scrollviews in the view hierarchy and makes sure they do not
// interfere with scroll to top when tapping the statusbar.
- (void)optOutScrollsToTopForSubviews;
// Updates SSL status for the current navigation item based on the information
// provided by web view.
- (void)updateSSLStatusForCurrentNavigationItem;
@end
@implementation CRWWebController
// Synthesize as it is readonly.
@synthesize touchTrackingRecognizer = _touchTrackingRecognizer;
#pragma mark - Object lifecycle
- (instancetype)initWithWebState:(WebStateImpl*)webState {
self = [super init];
if (self) {
_webStateImpl = webState;
_webUsageEnabled = YES;
_allowsBackForwardNavigationGestures = YES;
DCHECK(_webStateImpl);
// Content area is lazily instantiated.
_defaultURL = GURL(url::kAboutBlankURL);
_requestController = [[CRWWebRequestController alloc] init];
_requestController.delegate = self;
_webViewProxy = [[CRWWebViewProxyImpl alloc] initWithWebController:self];
[[_webViewProxy scrollViewProxy] addObserver:self];
_pendingLoadCompleteActions = [[NSMutableArray alloc] init];
web::BrowserState* browserState = _webStateImpl->GetBrowserState();
_certVerificationController = [[CRWCertVerificationController alloc]
initWithBrowserState:browserState];
web::JavaScriptFindInPageManagerImpl::CreateForWebState(_webStateImpl);
web::TextFragmentsManagerImpl::CreateForWebState(_webStateImpl);
if (!browserState->IsOffTheRecord()) {
web::AnnotationsTextManager::CreateForWebState(_webStateImpl);
}
_navigationHandler = [[CRWWKNavigationHandler alloc] initWithDelegate:self];
_jsNavigationHandler = [[CRWJSNavigationHandler alloc] init];
_UIHandler = [[CRWWKUIHandler alloc] init];
_UIHandler.delegate = self;
_webViewNavigationObserver = [[CRWWebViewNavigationObserver alloc] init];
_webViewNavigationObserver.delegate = self;
}
return self;
}
- (void)dealloc {
DCHECK([NSThread isMainThread]);
DCHECK(_isBeingDestroyed); // 'close' must have been called already.
DCHECK(!_webView);
}
#pragma mark - Public property accessors
- (void)setWebUsageEnabled:(BOOL)enabled {
if (_webUsageEnabled == enabled)
return;
// WKWebView autoreleases its WKProcessPool on removal from superview.
// Deferring WKProcessPool deallocation may lead to issues with cookie
// clearing and and Browsing Data Partitioning implementation.
@autoreleasepool {
if (!enabled) {
[self removeWebView];
}
}
_webUsageEnabled = enabled;
// WKWebView autoreleases its WKProcessPool on removal from superview.
// Deferring WKProcessPool deallocation may lead to issues with cookie
// clearing and and Browsing Data Partitioning implementation.
@autoreleasepool {
if (enabled) {
// Don't create the web view; let it be lazy created as needed.
// The gesture is removed when the web usage is disabled. Add it back when
// it is enabled again.
[_containerView addGestureRecognizer:[self touchTrackingRecognizer]];
} else {
if (_touchTrackingRecognizer) {
[_containerView removeGestureRecognizer:_touchTrackingRecognizer];
_touchTrackingRecognizer.touchTrackingDelegate = nil;
_touchTrackingRecognizer = nil;
}
_currentURLLoadWasTrigerred = NO;
}
}
}
- (UIView*)view {
[self ensureContainerViewCreated];
DCHECK(_containerView);
return _containerView;
}
- (id<CRWWebViewNavigationProxy>)webViewNavigationProxy {
return static_cast<id<CRWWebViewNavigationProxy>>(self.webView);
}
- (double)loadingProgress {
return [self.webView estimatedProgress];
}
- (BOOL)isWebProcessCrashed {
return self.navigationHandler.webProcessCrashed;
}
- (BOOL)isUserInteracting {
return _userInteractionState.IsUserInteracting(self.webView);
}
- (void)setAllowsBackForwardNavigationGestures:
(BOOL)allowsBackForwardNavigationGestures {
// Store it to an instance variable as well as
// self.webView.allowsBackForwardNavigationGestures because self.webView may
// be nil. When self.webView is nil, it will be set later in -setWebView:.
_allowsBackForwardNavigationGestures = allowsBackForwardNavigationGestures;
self.webView.allowsBackForwardNavigationGestures =
allowsBackForwardNavigationGestures;
}
#pragma mark - Private properties accessors
- (void)setWebView:(WKWebView*)webView {
DCHECK_NE(_webView, webView);
// Unwind the old web view.
// Remove KVO and WK*Delegate before calling methods on WKWebView so that
// handlers won't receive unnecessary callbacks.
[_webView setNavigationDelegate:nil];
[_webView setUIDelegate:nil];
for (NSString* keyPath in self.WKWebViewObservers) {
[_webView removeObserver:self forKeyPath:keyPath];
}
self.webViewNavigationObserver.webView = nil;
web::WebViewWebStateMap::FromBrowserState(
self.webStateImpl->GetBrowserState())
->SetAssociatedWebViewForWebState(webView, self.webStateImpl);
if (_webView) {
self.webStateImpl->RemoveAllWebFrames();
[_webView stopLoading];
[_webView removeFromSuperview];
// Since the WKWebView is about to be released, the kvo for the `loading`
// state will not be received. Without manually setting loading to false,
// the tab will appear to be endlessly loading until the next page load
// completes.
self.webStateImpl->SetIsLoading(false);
}
// Set up the new web view.
_webView = webView;
if (_webView) {
[_webView setNavigationDelegate:self.navigationHandler];
[_webView setUIDelegate:self.UIHandler];
for (NSString* keyPath in self.WKWebViewObservers) {
[_webView addObserver:self forKeyPath:keyPath options:0 context:nullptr];
}
_webView.allowsBackForwardNavigationGestures =
_allowsBackForwardNavigationGestures;
}
self.webViewNavigationObserver.webView = _webView;
[self setDocumentURL:_defaultURL context:nullptr];
}
- (UIScrollView*)webScrollView {
return self.webView.scrollView;
}
- (NSDictionary*)WKWebViewObservers {
NSMutableDictionary<NSString*, NSString*>* observers =
[[NSMutableDictionary alloc] initWithDictionary:@{
@"serverTrust" : @"webViewSecurityFeaturesDidChange",
@"hasOnlySecureContent" : @"webViewSecurityFeaturesDidChange",
@"title" : @"webViewTitleDidChange",
@"cameraCaptureState" : @"webViewCameraCaptureStateDidChange",
@"microphoneCaptureState" : @"webViewMicrophoneCaptureStateDidChange",
@"underPageBackgroundColor" :
@"webViewUnderPageBackgroundColorDidChange",
}];
if (web::GetWebClient()->EnableFullscreenAPI()) {
[observers addEntriesFromDictionary:@{
@"fullscreenState" : @"fullscreenStateDidChange"
}];
}
return observers;
}
- (WebState*)webState {
return _webStateImpl;
}
- (CGPoint)scrollPosition {
return self.webScrollView.contentOffset;
}
- (CRWTouchTrackingRecognizer*)touchTrackingRecognizer {
if (!_touchTrackingRecognizer) {
_touchTrackingRecognizer =
[[CRWTouchTrackingRecognizer alloc] initWithTouchTrackingDelegate:self];
}
return _touchTrackingRecognizer;
}
- (BOOL)isCover {
return _containerView.cover;
}
#pragma mark Navigation and Session Information
- (NavigationManagerImpl*)navigationManagerImpl {
return self.webStateImpl ? &(self.webStateImpl->GetNavigationManagerImpl())
: nil;
}
- (web::NavigationItemImpl*)currentNavItem {
return self.navigationManagerImpl
? self.navigationManagerImpl->GetCurrentItemImpl()
: nullptr;
}
#pragma mark - ** Public Methods **
#pragma mark - Header public methods
- (web::NavigationItemImpl*)lastPendingItemForNewNavigation {
WKNavigation* navigation =
[self.navigationHandler.navigationStates
lastNavigationWithPendingItemInNavigationContext];
if (!navigation)
return nullptr;
web::NavigationContextImpl* context =
[self.navigationHandler.navigationStates contextForNavigation:navigation];
return context->GetItem();
}
// Caller must reset the delegate before calling.
- (void)close {
self.webStateImpl->CancelDialogs();
_SSLStatusUpdater = nil;
[self.navigationHandler close];
[self.UIHandler close];
[self.jsNavigationHandler close];
[self.requestController close];
[self.webViewNavigationObserver close];
// Mark the destruction sequence has started, in case someone else holds a
// strong reference and tries to continue using the tab.
DCHECK(!_isBeingDestroyed);
_isBeingDestroyed = YES;
// Remove the web view now. Otherwise, delegate callbacks occur.
[self removeWebView];
// Explicitly reset content to clean up views and avoid dangling KVO
// observers.
[_containerView resetContentForShutdown:YES];
_webStateImpl = nullptr;
DCHECK(!self.webView);
// TODO(crbug.com/41284914): Don't set the delegate to nil.
[_containerView setDelegate:nil];
_touchTrackingRecognizer.touchTrackingDelegate = nil;
[[_webViewProxy scrollViewProxy] removeObserver:self];
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (BOOL)isViewAlive {
return !self.navigationHandler.webProcessCrashed &&
[_containerView isViewAlive];
}
- (BOOL)contentIsHTML {
return self.webView &&
web::IsContentTypeHtml(self.webState->GetContentsMimeType());
}
- (GURL)currentURL {
// The web view URL is the current URL only if it is neither a placeholder URL
// (used to hold WKBackForwardListItem for WebUI) nor a restore_session.html
// (used to replay session history in WKWebView).
// TODO(crbug.com/40528091): Investigate if this method is still needed and if
// it can be implemented using NavigationManager API after removal of legacy
// navigation stack.
if (self.webView && !IsWKInternalUrl(self.webView.URL)) {
return _documentURL;
}
web::NavigationItem* item =
self.navigationManagerImpl
->GetLastCommittedItemInCurrentOrRestoredSession();
if (item) {
// This special case is added for any app specific URLs that have been
// rewritten to about:// URLs.
if (item->GetURL().SchemeIs(url::kAboutScheme) &&
web::GetWebClient()->IsAppSpecificURL(item->GetVirtualURL())) {
return item->GetURL();
}
return item->GetVirtualURL();
}
return GURL();
}
- (void)reloadWithRendererInitiatedNavigation:(BOOL)rendererInitiated {
// Clear last user interaction.
// TODO(crbug.com/41211432): Move to after the load commits, in the subclass
// implementation. This will be inaccurate if the reload fails or is
// cancelled.
_userInteractionState.SetLastUserInteraction(nullptr);
base::RecordAction(base::UserMetricsAction("Reload"));
[_requestController reloadWithRendererInitiatedNavigation:rendererInitiated];
}
- (void)stopLoading {
base::RecordAction(base::UserMetricsAction("Stop"));
// Discard all pending items before notifying WebState observers
self.navigationManagerImpl->DiscardNonCommittedItems();
for (__strong id navigation in
[self.navigationHandler.navigationStates pendingNavigations]) {
if (navigation == [NSNull null]) {
// null is a valid navigation object passed to WKNavigationDelegate
// callbacks and represents window opening action.
navigation = nil;
}
// This will remove pending item for navigations which may still call
// WKNavigationDelegate callbacks see (crbug.com/969915).
web::NavigationContextImpl* context =
[self.navigationHandler.navigationStates
contextForNavigation:navigation];
context->ReleaseItem();
}
[self.webView stopLoading];
[self.navigationHandler stopLoading];
}
- (void)loadCurrentURLWithRendererInitiatedNavigation:(BOOL)rendererInitiated {
// If the content view doesn't exist, the tab has either been evicted, or
// never displayed. Bail, and let the URL be loaded when the tab is shown.
if (!_containerView)
return;
// NavigationManagerImpl needs WKWebView to load native views, but WKWebView
// cannot be created while web usage is disabled to avoid breaking clearing
// browser data. Bail now and let the URL be loaded when web usage is enabled
// again. This can happen when purging web pages when an interstitial is
// presented over a native view. See https://crbug.com/865985 for details.
if (!_webUsageEnabled)
return;
_currentURLLoadWasTrigerred = YES;
[_requestController
loadCurrentURLWithRendererInitiatedNavigation:rendererInitiated];
}
- (void)loadCurrentURLIfNecessary {
if (self.navigationHandler.webProcessCrashed) {
// Log a user reloading a previously crashed renderer.
base::RecordAction(
base::UserMetricsAction("IOSMobileReloadCrashedRenderer"));
[self loadCurrentURLWithRendererInitiatedNavigation:NO];
} else if (!_currentURLLoadWasTrigerred) {
[self ensureContainerViewCreated];
// TODO(crbug.com/41361784): end the practice of calling `loadCurrentURL`
// when it is possible there is no current URL. If the call performs
// necessary initialization, break that out.
[self loadCurrentURLWithRendererInitiatedNavigation:NO];
}
}
- (void)loadData:(NSData*)data
MIMEType:(NSString*)MIMEType
forURL:(const GURL&)URL {
[_requestController loadData:data MIMEType:MIMEType forURL:URL];
}
- (void)loadSimulatedRequest:(const GURL&)URL
responseHTMLString:(NSString*)responseHTMLString {
NSURLRequest* request =
[[NSURLRequest alloc] initWithURL:net::NSURLWithGURL(URL)];
[self.webView loadSimulatedRequest:request
responseHTMLString:responseHTMLString];
}
- (void)loadSimulatedRequest:(const GURL&)URL
responseData:(NSData*)responseData
MIMEType:(NSString*)MIMEType {
NSURL* url = net::NSURLWithGURL(URL);
NSURLRequest* request = [[NSURLRequest alloc] initWithURL:url];
NSURLResponse* response =
[[NSURLResponse alloc] initWithURL:url
MIMEType:MIMEType
expectedContentLength:responseData.length
textEncodingName:nil];
[self.webView loadSimulatedRequest:request
response:response
responseData:responseData];
}
// Loads the HTML into the page at the given URL. Only for testing purpose.
- (void)loadHTML:(NSString*)HTML forURL:(const GURL&)URL {
[_requestController loadHTML:HTML forURL:URL];
}
- (void)recordStateInHistory {
// Only record the state if:
// - the current NavigationItem's URL matches the current URL, and
// - the user has interacted with the page.
}
- (void)setVisible:(BOOL)visible {
_visible = visible;
}
- (void)wasShown {
self.visible = YES;
// WebKit adds a drop interaction to a subview (WKContentView) of WKWebView's
// scrollView when the web view is added to the view hierarchy.
[self addCustomURLDropInteractionIfNeeded];
}
- (void)wasHidden {
self.visible = NO;
if (_isBeingDestroyed)
return;
[self recordStateInHistory];
}
- (void)setKeepsRenderProcessAlive:(BOOL)keepsRenderProcessAlive {
_keepsRenderProcessAlive = keepsRenderProcessAlive;
[_containerView
updateWebViewContentViewForContainerWindow:_containerView.window];
}
- (void)goToBackForwardListItem:(WKBackForwardListItem*)wk_item
navigationItem:(web::NavigationItem*)item
navigationInitiationType:(web::NavigationInitiationType)type
hasUserGesture:(BOOL)hasUserGesture {
WKNavigation* navigation;
// Where possible, call `goBack` or `goForward` since WebKit has logic
// specific to those functions for skipping over maliciously-added items. See
// crbug.com/40072465 for an example.
if (wk_item == self.webView.backForwardList.backItem) {
navigation = [self.webView goBack];
} else if (wk_item == self.webView.backForwardList.forwardItem) {
navigation = [self.webView goForward];
} else {
navigation = [self.webView goToBackForwardListItem:wk_item];
}
GURL URL = net::GURLWithNSURL(wk_item.URL);
self.webStateImpl->ClearWebUI();
// This navigation can be an iframe navigation, but it's not possible to
// distinguish it from the main frame navigation, so context still has to be
// created.
std::unique_ptr<web::NavigationContextImpl> context =
web::NavigationContextImpl::CreateNavigationContext(
self.webStateImpl, URL, hasUserGesture,
static_cast<ui::PageTransition>(
item->GetTransitionType() |
ui::PageTransition::PAGE_TRANSITION_FORWARD_BACK),
type == web::NavigationInitiationType::RENDERER_INITIATED);
context->SetNavigationItemUniqueID(item->GetUniqueID());
bool isSameDocument = web::GURLByRemovingRefFromGURL(URL) ==
web::GURLByRemovingRefFromGURL(_documentURL);
if (isSameDocument) {
context->SetIsSameDocument(true);
} else {
self.navigationHandler.navigationState = web::WKNavigationState::REQUESTED;
}
if ([CRWErrorPageHelper isErrorPageFileURL:URL]) {
context->SetLoadingErrorPage(true);
}
web::WKBackForwardListItemHolder* holder =
web::WKBackForwardListItemHolder::FromNavigationItem(item);
holder->set_navigation_type(WKNavigationTypeBackForward);
context->SetIsPost(
(holder && [holder->http_method() isEqualToString:@"POST"]) ||
item->HasPostData());
if (holder) {
context->SetMimeType(holder->mime_type());
}
[self.navigationHandler.navigationStates setContext:std::move(context)
forNavigation:navigation];
[self.navigationHandler.navigationStates
setState:web::WKNavigationState::REQUESTED
forNavigation:navigation];
}
- (void)takeSnapshotWithRect:(CGRect)rect
completion:(void (^)(UIImage*))completion {
if (!self.webView) {
dispatch_async(dispatch_get_main_queue(), ^{
completion(nil);
});
return;
}
WKSnapshotConfiguration* configuration =
[[WKSnapshotConfiguration alloc] init];
CGRect convertedRect = [self.webView convertRect:rect fromView:self.view];
configuration.rect = convertedRect;
__weak CRWWebController* weakSelf = self;
[self.webView
takeSnapshotWithConfiguration:configuration
completionHandler:^(UIImage* snapshot, NSError* error) {
// Pass nil to the completion block if there is an error
// or if the web view has been removed before the
// snapshot is finished. `snapshot` can sometimes be
// corrupt if it's sent due to the WKWebView's
// deallocation, so callbacks received after
// `-removeWebView` are ignored to prevent crashing.
if (error || !weakSelf.webView) {
if (error) {
DLOG(ERROR)
<< "WKWebView snapshot error: "
<< base::SysNSStringToUTF8(error.description);
}
completion(nil);
} else {
completion(snapshot);
}
}];
}
- (void)createFullPagePDFWithCompletion:(void (^)(NSData*))completionBlock {
// Invoke the `completionBlock` with nil rather than a blank PDF for certain
// URLs or if there is a javascript dialog running.
const GURL& URL = self.webState->GetLastCommittedURL();
if (![self contentIsHTML] || !URL.is_valid() ||
web::GetWebClient()->IsAppSpecificURL(URL) ||
self.webStateImpl->IsJavaScriptDialogRunning()) {
dispatch_async(dispatch_get_main_queue(), ^{
completionBlock(nil);
});
return;
}
web::CreateFullPagePdf(self.webView, base::BindOnce(completionBlock));
}
- (void)closeMediaPresentations {
if (@available(iOS 16, *)) {
if (self.webView.fullscreenState == WKFullscreenStateInFullscreen ||
self.webView.fullscreenState == WKFullscreenStateEnteringFullscreen) {
[self.webView closeAllMediaPresentationsWithCompletionHandler:^{
}];
return;
}
}
[self.webView requestMediaPlaybackStateWithCompletionHandler:^(
WKMediaPlaybackState mediaPlaybackState) {
if (mediaPlaybackState == WKMediaPlaybackStateNone) {
return;
}
// Completion handler is needed to avoid a crash when called.
[self.webView closeAllMediaPresentationsWithCompletionHandler:^{
}];
}];
}
- (void)removeWebViewFromViewHierarchyForShutdown:(BOOL)shutdown {
[_containerView resetContentForShutdown:shutdown];
}
- (void)addWebViewToViewHierarchy {
[self displayWebView];
}
- (BOOL)setSessionStateData:(NSData*)data {
NSData* interactionState = data;
// Old versions of chrome wrapped interactionState in a keyed unarchiver.
// This step was unnecessary. Rather than migrate all blobs over, simply
// check for an unarchiver here. NSKeyed data will start with 'bplist00',
// which differs from the header of a WebKit session coding (0x00000002).
// This logic can be removed after this change has gone live for a while.
constexpr char kArchiveHeader[] = "bplist00";
if (data.length > strlen(kArchiveHeader) &&
memcmp(data.bytes, kArchiveHeader, strlen(kArchiveHeader)) == 0) {
NSError* error = nil;
NSKeyedUnarchiver* unarchiver =
[[NSKeyedUnarchiver alloc] initForReadingFromData:data error:&error];
if (!unarchiver || error) {
DLOG(WARNING) << "Error creating unarchiver for session state data: "
<< base::SysNSStringToUTF8([error description]);
return NO;
}
unarchiver.requiresSecureCoding = NO;
interactionState =
[unarchiver decodeObjectForKey:NSKeyedArchiveRootObjectKey];
if (!interactionState) {
DLOG(WARNING) << "Error decoding interactionState.";
return NO;
}
}
[self ensureWebViewCreated];
DCHECK_EQ(self.webView.backForwardList.currentItem, nil);
self.navigationHandler.blockUniversalLinksOnNextDecidePolicy = true;
[self.webView setInteractionState:interactionState];
if (!base::FeatureList::IsEnabled(kIOSSessionRestoreLoadTriggerKillSwitch)) {
_currentURLLoadWasTrigerred = YES;
}
return YES;
}
- (web::PermissionState)stateForPermission:(web::Permission)permission {
WKMediaCaptureState captureState;
switch (permission) {
case web::PermissionCamera:
captureState = self.webView.cameraCaptureState;
break;
case web::PermissionMicrophone:
captureState = self.webView.microphoneCaptureState;
break;
}
switch (captureState) {
case WKMediaCaptureStateActive:
return web::PermissionStateAllowed;
case WKMediaCaptureStateMuted:
return web::PermissionStateBlocked;
case WKMediaCaptureStateNone:
return web::PermissionStateNotAccessible;
}
}
- (void)setState:(web::PermissionState)state
forPermission:(web::Permission)permission {
WKMediaCaptureState captureState;
switch (state) {
case web::PermissionStateAllowed:
captureState = WKMediaCaptureStateActive;
break;
case web::PermissionStateBlocked:
captureState = WKMediaCaptureStateMuted;
break;
case web::PermissionStateNotAccessible:
captureState = WKMediaCaptureStateNone;
break;
}
switch (permission) {
case web::PermissionCamera:
[self.webView setCameraCaptureState:captureState completionHandler:nil];
break;
case web::PermissionMicrophone:
[self.webView setMicrophoneCaptureState:captureState
completionHandler:nil];
break;
}
}
- (NSDictionary<NSNumber*, NSNumber*>*)statesForAllPermissions {
return @{
@(web::PermissionCamera) :
@([self stateForPermission:web::PermissionCamera]),
@(web::PermissionMicrophone) :
@([self stateForPermission:web::PermissionMicrophone])
};
}
- (NSData*)sessionStateData {
return self.webView.interactionState;
}
- (void)handleViewportFit:(BOOL)isCover {
_containerView.cover = isCover;
[_containerView layoutSubviews];
}
- (void)handleNavigationHashChange {
web::NavigationItemImpl* currentItem = self.currentNavItem;
if (currentItem) {
currentItem->SetIsCreatedFromHashChange(true);
}
}
- (void)handleNavigationWillChangeState {
[self.jsNavigationHandler handleNavigationWillChangeState];
}
- (void)handleNavigationDidPushStateMessage:(base::Value::Dict*)dict {
[self.jsNavigationHandler
handleNavigationDidPushStateMessage:dict
webState:_webStateImpl
hasUserGesture:self.isUserInteracting
userInteractionState:&_userInteractionState
currentURL:self.currentURL];
[self updateSSLStatusForCurrentNavigationItem];
}
- (void)handleNavigationDidReplaceStateMessage:(base::Value::Dict*)dict {
[self.jsNavigationHandler
handleNavigationDidReplaceStateMessage:dict
webState:_webStateImpl
hasUserGesture:self.isUserInteracting
userInteractionState:&_userInteractionState
currentURL:self.currentURL];
}
- (void)downloadCurrentPageToDestinationPath:(NSString*)destination
delegate:
(id<CRWWebViewDownloadDelegate>)delegate
handler:(void (^)(id<CRWWebViewDownload>))
handler {
const NavigationManagerImpl* navigationManager = self.navigationManagerImpl;
GURL url = navigationManager->GetLastCommittedItem()
? navigationManager->GetLastCommittedItem()->GetURL()
: [self currentURL];
NSURLRequest* request = [NSURLRequest requestWithURL:net::NSURLWithGURL(url)];
CRWWebViewDownload* download =
[[CRWWebViewDownload alloc] initWithPath:destination
request:request
webview:self.webView
delegate:delegate];
[download startDownload];
handler(download);
}
- (BOOL)findInteractionSupported {
if (@available(iOS 16, *)) {
// The `findInteraction` property only exists for iOS 16 or later, if there
// is a web view.
return self.webView != nil;
}
return false;
}
- (void)setFindInteractionEnabled:(BOOL)enabled {
if (@available(iOS 16, *)) {
self.webView.findInteractionEnabled = enabled;
}
}
- (BOOL)findInteractionEnabled {
if (@available(iOS 16, *)) {
return self.webView.findInteractionEnabled;
}
return NO;
}
- (id<CRWFindInteraction>)findInteraction API_AVAILABLE(ios(16)) {
if (self.webView.findInteraction) {
return [[CRWFindInteraction alloc]
initWithUIFindInteraction:self.webView.findInteraction];
}
return nil;
}
- (id)activityItem {
if (!self.webView || ![_containerView webViewContentView]) {
return nil;
}
DCHECK([self.webView isKindOfClass:[WKWebView class]]);
return self.webView;
}
- (UIColor*)themeColor {
return self.webView.themeColor;
}
- (UIColor*)underPageBackgroundColor {
return self.webView.underPageBackgroundColor;
}
#pragma mark - JavaScript
- (void)retrieveExistingFramesInContentWorld:(WKContentWorld*)contentWorld {
web::RegisterExistingFrames(self.webView, contentWorld);
}
- (void)executeJavaScript:(NSString*)javascript
completionHandler:(void (^)(id result, NSError* error))completion {
__block void (^stack_completion_block)(id result, NSError* error) =
[completion copy];
web::ExecuteJavaScript(self.webView, javascript, ^(id value, NSError* error) {
if (error) {
DLOG(WARNING) << "Script execution failed with error: "
<< base::SysNSStringToUTF16(
error.userInfo[NSLocalizedDescriptionKey]);
}
if (stack_completion_block) {
stack_completion_block(value, error);
}
});
}
- (void)executeUserJavaScript:(NSString*)javascript
completionHandler:(void (^)(id result, NSError* error))completion {
// For security reasons, executing JavaScript on pages with app-specific URLs
// is not allowed, because those pages may have elevated privileges.
if (web::GetWebClient()->IsAppSpecificURL(
self.webStateImpl->GetLastCommittedURL())) {
if (completion) {
dispatch_async(dispatch_get_main_queue(), ^{
NSError* error = [[NSError alloc]
initWithDomain:web::kJSEvaluationErrorDomain
code:web::JS_EVALUATION_ERROR_CODE_REJECTED
userInfo:nil];
completion(nil, error);
});
}
return;
}
[self touched:YES];
[self executeJavaScript:javascript completionHandler:completion];
}
#pragma mark - CRWTouchTrackingDelegate (Public)
- (void)touched:(BOOL)touched {
_userInteractionState.SetTapInProgress(touched);
if (touched) {
_userInteractionState.SetUserInteractionRegisteredSincePageLoaded(true);
if (_isBeingDestroyed)
return;
const NavigationManagerImpl* navigationManager = self.navigationManagerImpl;
GURL mainDocumentURL =
navigationManager->GetLastCommittedItem()
? navigationManager->GetLastCommittedItem()->GetURL()
: [self currentURL];
_userInteractionState.SetLastUserInteraction(
std::make_unique<web::UserInteractionEvent>(mainDocumentURL));
[self hideAnnotationsHighlight];
}
}
#pragma mark - Context Menu
// Hides annotations highlights triggered by context menu.
- (void)hideAnnotationsHighlight {
web::AnnotationsTextManager* manager =
web::AnnotationsTextManager::FromWebState(_webStateImpl);
if (manager) {
manager->RemoveHighlight();
}
}
#pragma mark - ** Private Methods **
- (void)setDocumentURL:(const GURL&)newURL
context:(web::NavigationContextImpl*)context {
GURL oldDocumentURL = _documentURL;
if (newURL != _documentURL && newURL.is_valid()) {
_documentURL = newURL;
_userInteractionState.SetUserInteractionRegisteredSinceLastUrlChange(false);
}
if (context && !context->IsLoadingErrorPage() &&
!context->IsLoadingHtmlString() && !IsWKInternalUrl(newURL) &&
!newURL.SchemeIs(url::kAboutScheme) && self.webView) {
// On iOS13, WebKit started changing the URL visible webView.URL when
// opening a new tab and then writing to it, e.g.
// window.open('javascript:document.write(1)'). This URL is never commited,
// so it should be OK to ignore this URL change.
if (oldDocumentURL.IsAboutBlank() &&
!self.webStateImpl->GetNavigationManager()->GetLastCommittedItem() &&
!self.webView.loading) {
return;
}
// Ignore mismatches triggered by a WKWebView out-of-sync back forward list.
if (![self.webView.backForwardList.currentItem.URL
isEqual:self.webView.URL]) {
return;
}
GURL documentOrigin = newURL.DeprecatedGetOriginAsURL();
web::NavigationItem* committedItem =
self.webStateImpl->GetNavigationManager()->GetLastCommittedItem();
GURL committedURL = committedItem ? committedItem->GetURL() : GURL();
GURL committedOrigin = committedURL.DeprecatedGetOriginAsURL();
DCHECK_EQ(documentOrigin, committedOrigin)
<< "Old and new URL detection system have a mismatch";
}
}
- (BOOL)isUserInitiatedAction:(WKNavigationAction*)action {
return _userInteractionState.IsUserInteracting(self.webView);
}
// Adds a custom drop interaction to the same subview of `self.webScrollView`
// that already has a default drop interaction.
- (void)addCustomURLDropInteractionIfNeeded {
BOOL subviewWithDefaultInteractionFound = NO;
for (UIView* subview in self.webScrollView.subviews) {
BOOL defaultInteractionFound = NO;
BOOL customInteractionFound = NO;
for (id<UIInteraction> interaction in subview.interactions) {
if ([interaction isKindOfClass:[UIDropInteraction class]]) {
if (interaction == self.customDropInteraction) {
customInteractionFound = YES;
} else {
DCHECK(!defaultInteractionFound &&
!subviewWithDefaultInteractionFound)
<< "There should be only one default drop interaction in the "
"webScrollView.";
defaultInteractionFound = YES;
subviewWithDefaultInteractionFound = YES;
}
}
}
if (customInteractionFound) {
// The custom interaction must be added after the default drop interaction
// to work properly.
[subview removeInteraction:self.customDropInteraction];
[subview addInteraction:self.customDropInteraction];
} else if (defaultInteractionFound) {
if (!self.customDropInteraction) {
self.customDropInteraction =
[[UIDropInteraction alloc] initWithDelegate:self];
}
[subview addInteraction:self.customDropInteraction];
}
}
}
#pragma mark - End of loading
- (void)didFinishNavigation:(web::NavigationContextImpl*)context {
// This can be called at multiple times after the document has loaded. Do
// nothing if the document has already loaded.
if (self.navigationHandler.navigationState ==
web::WKNavigationState::FINISHED)
return;
web::NavigationItem* pendingOrCommittedItem =
self.navigationManagerImpl->GetPendingItem();
if (!pendingOrCommittedItem)
pendingOrCommittedItem = self.navigationManagerImpl->GetLastCommittedItem();
if (pendingOrCommittedItem) {
// This stores the UserAgent that was used to load the item.
if (pendingOrCommittedItem->GetUserAgentType() ==
web::UserAgentType::NONE &&
web::wk_navigation_util::URLNeedsUserAgentType(
pendingOrCommittedItem->GetURL())) {
pendingOrCommittedItem->SetUserAgentType(
self.webStateImpl->GetUserAgentForNextNavigation(
pendingOrCommittedItem->GetURL()));
}
}
// Restore allowsBackForwardNavigationGestures once restoration is complete.
if (!self.navigationManagerImpl->IsRestoreSessionInProgress()) {
if (_webView.allowsBackForwardNavigationGestures !=
_allowsBackForwardNavigationGestures) {
_webView.allowsBackForwardNavigationGestures =
_allowsBackForwardNavigationGestures;
}
}
BOOL success = !context || !context->GetError();
[self loadCompleteWithSuccess:success forContext:context];
// WebKit adds a drop interaction to a subview (WKContentView) of WKWebView's
// scrollView when a new WebProcess finishes launching. This can be loading
// the first page, navigating cross-domain, or recovering from a WebProcess
// crash. Add a custom drop interaction alongside the default drop
// interaction.
[self addCustomURLDropInteractionIfNeeded];
}
- (void)loadCompleteWithSuccess:(BOOL)loadSuccess
forContext:(web::NavigationContextImpl*)context {
// The webView may have been torn down. Be safe and do nothing if that's
// happened.
if (self.navigationHandler.navigationState != web::WKNavigationState::STARTED)
return;
const GURL currentURL([self currentURL]);
self.navigationHandler.navigationState = web::WKNavigationState::FINISHED;
[self optOutScrollsToTopForSubviews];
// Perform post-load-finished updates.
[_requestController didFinishWithURL:currentURL
loadSuccess:loadSuccess
context:context];
// Execute the pending LoadCompleteActions.
for (ProceduralBlock action in _pendingLoadCompleteActions) {
action();
}
[_pendingLoadCompleteActions removeAllObjects];
}
#pragma mark - CRWWebControllerContainerViewDelegate
- (CRWWebViewProxyImpl*)contentViewProxyForContainerView:
(CRWWebControllerContainerView*)containerView {
return _webViewProxy;
}
- (BOOL)shouldKeepRenderProcessAliveForContainerView:
(CRWWebControllerContainerView*)containerView {
return self.shouldKeepRenderProcessAlive;
}
- (void)containerView:(CRWWebControllerContainerView*)containerView
storeWebViewInWindow:(UIView*)viewToStash {
[web::GetWebClient()->GetWindowedContainer() addSubview:viewToStash];
}
#pragma mark - CRWWebViewScrollViewProxyObserver
- (void)webViewScrollViewDidZoom:
(CRWWebViewScrollViewProxy*)webViewScrollViewProxy {
}
- (void)webViewScrollViewDidResetContentSize:
(CRWWebViewScrollViewProxy*)webViewScrollViewProxy {
}
// Under WKWebView, JavaScript can execute asynchronously. User can start
// scrolling and calls to window.scrollTo executed during scrolling will be
// treated as "during user interaction" and can cause app to go fullscreen.
// This is a workaround to use this webViewScrollViewIsDragging flag to ignore
// window.scrollTo while user is scrolling. See crbug.com/554257
- (void)webViewScrollViewWillBeginDragging:
(CRWWebViewScrollViewProxy*)webViewScrollViewProxy {
web::java_script_features::GetScrollHelperJavaScriptFeature()
->SetWebViewScrollViewIsDragging(self.webState, true);
}
- (void)webViewScrollViewDidEndDragging:
(CRWWebViewScrollViewProxy*)webViewScrollViewProxy
willDecelerate:(BOOL)decelerate {
web::java_script_features::GetScrollHelperJavaScriptFeature()
->SetWebViewScrollViewIsDragging(self.webState, false);
}
#pragma mark - Fullscreen
- (void)optOutScrollsToTopForSubviews {
NSMutableArray* stack =
[NSMutableArray arrayWithArray:[self.webScrollView subviews]];
while (stack.count) {
UIView* current = [stack lastObject];
[stack removeLastObject];
[stack addObjectsFromArray:[current subviews]];
if ([current isKindOfClass:[UIScrollView class]])
static_cast<UIScrollView*>(current).scrollsToTop = NO;
}
}
#if defined(__IPHONE_16_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_16_0
CrFullscreenState CrFullscreenStateFromWKFullscreenState(
WKFullscreenState state) API_AVAILABLE(ios(16.0)) {
switch (state) {
case WKFullscreenStateEnteringFullscreen:
return CrFullscreenState::kEnteringFullscreen;
case WKFullscreenStateExitingFullscreen:
return CrFullscreenState::kExitingFullscreen;
case WKFullscreenStateInFullscreen:
return CrFullscreenState::kInFullscreen;
case WKFullscreenStateNotInFullscreen:
return CrFullscreenState::kNotInFullScreen;
default:
NOTREACHED_IN_MIGRATION();
return CrFullscreenState::kNotInFullScreen;
}
}
#endif // defined (__IPHONE_16_0)
#pragma mark - Security Helpers
- (void)updateSSLStatusForCurrentNavigationItem {
if (_isBeingDestroyed) {
return;
}
NavigationManagerImpl* navManager = self.navigationManagerImpl;
web::NavigationItem* currentNavItem = navManager->GetLastCommittedItem();
if (!currentNavItem) {
return;
}
if (!_SSLStatusUpdater) {
_SSLStatusUpdater =
[[CRWSSLStatusUpdater alloc] initWithDataSource:self
navigationManager:navManager];
[_SSLStatusUpdater setDelegate:self];
}
NSString* host = base::SysUTF8ToNSString(_documentURL.host());
BOOL hasOnlySecureContent = [self.webView hasOnlySecureContent];
base::apple::ScopedCFTypeRef<SecTrustRef> trust;
trust.reset([self.webView serverTrust], base::scoped_policy::RETAIN);
[_SSLStatusUpdater updateSSLStatusForNavigationItem:currentNavItem
withCertHost:host
trust:std::move(trust)
hasOnlySecureContent:hasOnlySecureContent];
}
#pragma mark - WebView Helpers
// Creates a container view if it's not yet created.
- (void)ensureContainerViewCreated {
if (_containerView)
return;
DCHECK(!_isBeingDestroyed);
// Create the top-level parent view, which will contain the content. Note,
// this needs to be created with a non-zero size to allow for subviews with
// autosize constraints to be correctly processed.
_containerView =
[[CRWWebControllerContainerView alloc] initWithDelegate:self];
// This will be resized later, but matching the final frame will minimize
// re-rendering.
UIView* browserContainer = self.webStateImpl->GetWebViewContainer();
if (browserContainer) {
_containerView.frame = browserContainer.bounds;
} else {
// Use the screen size because the application's key window and the
// container may still be nil.
_containerView.frame = GetAnyKeyWindow() ? GetAnyKeyWindow().bounds
: UIScreen.mainScreen.bounds;
}
DCHECK(!CGRectIsEmpty(_containerView.frame));
[_containerView addGestureRecognizer:[self touchTrackingRecognizer]];
}
// Creates a web view if it's not yet created.
- (WKWebView*)ensureWebViewCreated {
WKWebViewConfiguration* config =
[self webViewConfigurationProvider].GetWebViewConfiguration();
return [self ensureWebViewCreatedWithConfiguration:config];
}
// Creates a web view with given `config`. No-op if web view is already created.
- (WKWebView*)ensureWebViewCreatedWithConfiguration:
(WKWebViewConfiguration*)config {
if (!self.webView) {
// This has to be called to ensure the container view of `self.webView` is
// created. Otherwise `self.webView.frame.size` will be CGSizeZero which
// fails a DCHECK later.
[self ensureContainerViewCreated];
[self setWebView:[self webViewWithConfiguration:config]];
// The following is not called in -setWebView: as the latter used in unit
// tests with fake web view, which cannot be added to view hierarchy.
CHECK(_webUsageEnabled) << "Tried to create a web view while suspended!";
DCHECK(self.webView);
[self.webView setAutoresizingMask:UIViewAutoresizingFlexibleWidth |
UIViewAutoresizingFlexibleHeight];
// WKWebViews with invalid or empty frames have exhibited rendering bugs, so
// resize the view to match the container view upon creation.
[self.webView setFrame:[_containerView bounds]];
}
// If web view is not currently displayed and if the visible NavigationItem
// should be loaded in this web view, display it immediately. Otherwise, it
// will be displayed when the pending load is committed.
if (![_containerView webViewContentView]) {
[self displayWebView];
}
return self.webView;
}
// Returns a new autoreleased web view created with given configuration.
- (WKWebView*)webViewWithConfiguration:(WKWebViewConfiguration*)config {
// Do not attach the context menu controller immediately as the JavaScript
// delegate must be specified.
web::UserAgentType defaultUserAgent = web::UserAgentType::AUTOMATIC;
web::NavigationItem* item = self.currentNavItem;
web::UserAgentType userAgentType =
item ? item->GetUserAgentType() : defaultUserAgent;
if (userAgentType == web::UserAgentType::AUTOMATIC) {
userAgentType =
web::GetWebClient()->GetDefaultUserAgent(self.webStateImpl, GURL());
}
return web::BuildWKWebView(CGRectZero, config,
self.webStateImpl->GetBrowserState(),
userAgentType, self);
}
// Wraps the web view in a CRWWebViewContentView and adds it to the container
// view.
- (void)displayWebView {
if (!self.webView || [_containerView webViewContentView])
return;
CrFullscreenState fullScreenState = CrFullscreenState::kNotInFullScreen;
#if defined(__IPHONE_16_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_16_0
if (@available(iOS 16.0, *)) {
fullScreenState =
CrFullscreenStateFromWKFullscreenState(self.webView.fullscreenState);
}
#endif
CRWWebViewContentView* webViewContentView =
[[CRWWebViewContentView alloc] initWithWebView:self.webView
scrollView:self.webScrollView
fullscreenState:fullScreenState];
if (web::GetWebClient()->EnableLongPressUIContextMenu()) {
self.contextMenuController =
[[CRWContextMenuController alloc] initWithWebView:self.webView
webState:self.webStateImpl
containerView:webViewContentView];
}
[_containerView displayWebViewContentView:webViewContentView];
}
- (void)removeWebView {
if (!self.webView)
return;
self.webStateImpl->CancelDialogs();
self.navigationManagerImpl->DetachFromWebView();
[self setWebView:nil];
[self.navigationHandler stopLoading];
[_containerView resetContentForShutdown:YES];
// webView:didFailProvisionalNavigation:withError: may never be called after
// resetting WKWebView, so it is important to clear pending navigations now.
for (__strong id navigation in
[self.navigationHandler.navigationStates pendingNavigations]) {
[self.navigationHandler.navigationStates removeNavigation:navigation];
}
}
// Returns the WKWebViewConfigurationProvider associated with the web
// controller's BrowserState.
- (web::WKWebViewConfigurationProvider&)webViewConfigurationProvider {
web::BrowserState* browserState = self.webStateImpl->GetBrowserState();
return web::WKWebViewConfigurationProvider::FromBrowserState(browserState);
}
#pragma mark - CRWWKUIHandlerDelegate
- (WKWebView*)UIHandler:(CRWWKUIHandler*)UIHandler
createWebViewWithConfiguration:(WKWebViewConfiguration*)configuration
forWebState:(web::WebState*)webState {
CRWWebController* webController =
web::WebStateImpl::FromWebState(webState)->GetWebController();
DCHECK(!webController || webState->HasOpener());
[webController ensureWebViewCreatedWithConfiguration:configuration];
return webController.webView;
}
- (BOOL)UIHandler:(CRWWKUIHandler*)UIHandler
isUserInitiatedAction:(WKNavigationAction*)action {
return [self isUserInitiatedAction:action];
}
#pragma mark - WKNavigationDelegate Helpers
// Called when a page has actually started loading (i.e., for
// a web page the document has actually changed), or after the load request has
// been registered for a non-document-changing URL change. Updates internal
// state not specific to web pages.
- (void)didStartLoading {
self.navigationHandler.navigationState = web::WKNavigationState::STARTED;
_userInteractionState.SetUserInteractionRegisteredSincePageLoaded(false);
}
#pragma mark - CRWSSLStatusUpdaterDataSource
- (void)SSLStatusUpdater:(CRWSSLStatusUpdater*)SSLStatusUpdater
querySSLStatusForTrust:(base::apple::ScopedCFTypeRef<SecTrustRef>)trust
host:(NSString*)host
completionHandler:(StatusQueryHandler)completionHandler {
[_certVerificationController querySSLStatusForTrust:std::move(trust)
host:host
completionHandler:completionHandler];
}
#pragma mark - CRWSSLStatusUpdaterDelegate
- (void)SSLStatusUpdater:(CRWSSLStatusUpdater*)SSLStatusUpdater
didChangeSSLStatusForNavigationItem:(web::NavigationItem*)navigationItem {
web::NavigationItem* visibleItem =
self.webStateImpl->GetNavigationManager()->GetVisibleItem();
if (navigationItem == visibleItem)
self.webStateImpl->DidChangeVisibleSecurityState();
}
#pragma mark - KVO Observation
- (void)observeValueForKeyPath:(NSString*)keyPath
ofObject:(id)object
change:(NSDictionary*)change
context:(void*)context {
DCHECK(!self.beingDestroyed);
NSString* dispatcherSelectorName = self.WKWebViewObservers[keyPath];
DCHECK(dispatcherSelectorName);
if (dispatcherSelectorName) {
// With ARC memory management, it is not known what a method called
// via a selector will return. If a method returns a retained value
// (e.g. NS_RETURNS_RETAINED) that returned object will leak as ARC is
// unable to property insert the correct release calls for it.
// All selectors used here return void and take no parameters so it's safe
// to call a function mapping to the method implementation manually.
SEL selector = NSSelectorFromString(dispatcherSelectorName);
IMP methodImplementation = [self methodForSelector:selector];
if (methodImplementation) {
void (*methodCallFunction)(id, SEL) =
reinterpret_cast<void (*)(id, SEL)>(methodImplementation);
methodCallFunction(self, selector);
}
}
}
// Called when WKWebView certificateChain or hasOnlySecureContent property has
// changed.
- (void)webViewSecurityFeaturesDidChange {
if (self.navigationHandler.navigationState ==
web::WKNavigationState::REQUESTED) {
// Do not update SSL Status for pending load. It will be updated in
// `webView:didCommitNavigation:` callback.
return;
}
web::NavigationItem* item =
self.webStateImpl->GetNavigationManager()->GetLastCommittedItem();
// SSLStatus is manually set in CRWWKNavigationHandler for SSL errors, so
// skip calling the update method in these cases.
if (item && !net::IsCertStatusError(item->GetSSL().cert_status)) {
[self updateSSLStatusForCurrentNavigationItem];
}
}
// Called when WKWebView title has been changed.
- (void)webViewTitleDidChange {
// WKWebView's title becomes empty when the web process dies; ignore that
// update.
if (self.navigationHandler.webProcessCrashed) {
DCHECK_EQ(self.webView.title.length, 0U);
return;
}
web::WKNavigationState lastNavigationState =
[self.navigationHandler.navigationStates lastAddedNavigationState];
bool hasPendingNavigation =
lastNavigationState == web::WKNavigationState::REQUESTED ||
lastNavigationState == web::WKNavigationState::STARTED ||
lastNavigationState == web::WKNavigationState::REDIRECTED;
if (!hasPendingNavigation) {
// Do not update the title if there is a navigation in progress because
// there is no way to tell if KVO change fired for new or previous page.
[self.navigationHandler
setLastCommittedNavigationItemTitle:self.webView.title];
}
}
// Called when WKWebView cameraCaptureState property has changed.
- (void)webViewCameraCaptureStateDidChange {
self.webStateImpl->OnStateChangedForPermission(web::PermissionCamera);
}
// Called when WKWebView microphoneCaptureState property has changed.
- (void)webViewMicrophoneCaptureStateDidChange {
self.webStateImpl->OnStateChangedForPermission(web::PermissionMicrophone);
}
// Called when WKWebView underPageBackgroundColor property has changed.
- (void)webViewUnderPageBackgroundColorDidChange {
self.webStateImpl->OnUnderPageBackgroundColorChanged();
}
- (void)fullscreenStateDidChange {
#if defined(__IPHONE_16_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_16_0
if (@available(iOS 16.0, *)) {
CrFullscreenState fullScreenState =
CrFullscreenStateFromWKFullscreenState(self.webView.fullscreenState);
[_containerView updateWebViewContentViewFullscreenState:fullScreenState];
// Update state for `fullscreenModeOn` so that we can expose the current
// status of fullscreen mode through different interfaces.
_webPageInFullscreenMode =
fullScreenState == CrFullscreenState::kInFullscreen;
base::UmaHistogramEnumeration(kFullScreenStateHistogram, fullScreenState);
}
#endif // defined (__IPHONE_16_0)
}
#pragma mark - CRWWebViewHandlerDelegate
- (web::WebStateImpl*)webStateImplForWebViewHandler:
(CRWWebViewHandler*)handler {
return self.webStateImpl;
}
- (const GURL&)documentURLForWebViewHandler:(CRWWebViewHandler*)handler {
return _documentURL;
}
- (web::UserInteractionState*)userInteractionStateForWebViewHandler:
(CRWWebViewHandler*)handler {
return &_userInteractionState;
}
- (void)webViewHandlerUpdateSSLStatusForCurrentNavigationItem:
(CRWWebViewHandler*)handler {
[self updateSSLStatusForCurrentNavigationItem];
}
- (void)webViewHandler:(CRWWebViewHandler*)handler
didFinishNavigation:(web::NavigationContextImpl*)context {
[self didFinishNavigation:context];
}
- (void)ensureWebViewCreatedForWebViewHandler:(CRWWebViewHandler*)handler {
[self ensureWebViewCreated];
}
- (WKWebView*)webViewForWebViewHandler:(CRWWebViewHandler*)handler {
return self.webView;
}
#pragma mark - CRWWebViewNavigationObserverDelegate
- (CRWWKNavigationHandler*)navigationHandlerForNavigationObserver:
(CRWWebViewNavigationObserver*)navigationObserver {
return self.navigationHandler;
}
- (void)navigationObserver:(CRWWebViewNavigationObserver*)navigationObserver
didChangeDocumentURL:(const GURL&)documentURL
forContext:(web::NavigationContextImpl*)context {
[self setDocumentURL:documentURL context:context];
}
- (void)navigationObserver:(CRWWebViewNavigationObserver*)navigationObserver
didChangePageWithContext:(web::NavigationContextImpl*)context {
[self.navigationHandler webPageChangedWithContext:context
webView:self.webView];
}
- (void)navigationObserver:(CRWWebViewNavigationObserver*)navigationObserver
didLoadNewURL:(const GURL&)webViewURL
forSameDocumentNavigation:(BOOL)isSameDocumentNavigation {
std::unique_ptr<web::NavigationContextImpl> newContext =
[_requestController registerLoadRequestForURL:webViewURL
sameDocumentNavigation:isSameDocumentNavigation
hasUserGesture:NO
rendererInitiated:YES];
[self.navigationHandler webPageChangedWithContext:newContext.get()
webView:self.webView];
newContext->SetHasCommitted(!isSameDocumentNavigation);
self.webStateImpl->OnNavigationFinished(newContext.get());
// TODO(crbug.com/41359661): It is OK, but very brittle, to call
// `didFinishNavigation:` here because the gating condition is mutually
// exclusive with the condition below. Refactor this method after
// deprecating self.navigationHandler.pendingNavigationInfo.
if (newContext->GetWKNavigationType() == WKNavigationTypeBackForward) {
[self didFinishNavigation:newContext.get()];
}
}
- (void)navigationObserver:(CRWWebViewNavigationObserver*)navigationObserver
URLDidChangeWithoutDocumentChange:(const GURL&)newURL {
DCHECK(newURL == net::GURLWithNSURL(self.webView.URL));
if (base::FeatureList::IsEnabled(
web::features::kCrashOnUnexpectedURLChange)) {
if (_documentURL.DeprecatedGetOriginAsURL() !=
newURL.DeprecatedGetOriginAsURL()) {
if (!_documentURL.host().empty() &&
(base::Contains(newURL.username(), _documentURL.host()) ||
base::Contains(newURL.password(), _documentURL.host()))) {
CHECK(false);
}
}
}
DCHECK(_documentURL != newURL);
// If called during window.history.pushState or window.history.replaceState
// JavaScript evaluation, only update the document URL. This callback does not
// have any information about the state object and cannot create (or edit) the
// navigation entry for this page change. Web controller will sync with
// history changes when a window.history.didPushState or
// window.history.didReplaceState message is received, which should happen in
// the next runloop.
//
// Otherwise, simulate the whole delegate flow for a load (since the
// superclass currently doesn't have a clean separation between URL changes
// and document changes). Note that the order of these calls is important:
// registering a load request logically comes before updating the document
// URL, but also must come first since it uses state that is reset on URL
// changes.
// `newNavigationContext` only exists if this method has to create a new
// context object.
std::unique_ptr<web::NavigationContextImpl> newNavigationContext;
if (!self.jsNavigationHandler.changingHistoryState) {
if ([self.navigationHandler
contextForPendingMainFrameNavigationWithURL:newURL]) {
// NavigationManager::LoadURLWithParams() was called with URL that has
// different fragment comparing to the previous URL.
} else {
// This could be:
// 1.) Renderer-initiated fragment change
// 2.) Assigning same-origin URL to window.location
// 3.) Incorrectly handled window.location.replace (crbug.com/307072)
// 4.) Back-forward same document navigation
newNavigationContext =
[_requestController registerLoadRequestForURL:newURL
sameDocumentNavigation:YES
hasUserGesture:NO
rendererInitiated:YES];
}
}
[self setDocumentURL:newURL context:newNavigationContext.get()];
if (!self.jsNavigationHandler.changingHistoryState) {
// Pass either newly created context (if it exists) or context that already
// existed before.
web::NavigationContextImpl* navigationContext = newNavigationContext.get();
if (!navigationContext) {
navigationContext = [self.navigationHandler
contextForPendingMainFrameNavigationWithURL:newURL];
}
navigationContext->SetIsSameDocument(true);
self.webStateImpl->OnNavigationStarted(navigationContext);
[self didStartLoading];
self.navigationManagerImpl->CommitPendingItem(
navigationContext->ReleaseItem());
navigationContext->SetHasCommitted(true);
self.webStateImpl->OnNavigationFinished(navigationContext);
[self updateSSLStatusForCurrentNavigationItem];
[self didFinishNavigation:navigationContext];
}
}
#pragma mark - CRWWKNavigationHandlerDelegate
- (CRWCertVerificationController*)
certVerificationControllerForNavigationHandler:
(CRWWKNavigationHandler*)navigationHandler {
return _certVerificationController;
}
- (void)navigationHandler:(CRWWKNavigationHandler*)navigationHandler
createWebUIForURL:(const GURL&)URL {
[_requestController createWebUIForURL:URL];
}
- (void)navigationHandler:(CRWWKNavigationHandler*)navigationHandler
setDocumentURL:(const GURL&)newURL
context:(web::NavigationContextImpl*)context {
[self setDocumentURL:newURL context:context];
}
- (std::unique_ptr<web::NavigationContextImpl>)
navigationHandler:(CRWWKNavigationHandler*)navigationHandler
registerLoadRequestForURL:(const GURL&)URL
sameDocumentNavigation:(BOOL)sameDocumentNavigation
hasUserGesture:(BOOL)hasUserGesture
rendererInitiated:(BOOL)renderedInitiated {
return [_requestController registerLoadRequestForURL:URL
sameDocumentNavigation:sameDocumentNavigation
hasUserGesture:hasUserGesture
rendererInitiated:renderedInitiated];
}
- (void)navigationHandlerDisplayWebView:
(CRWWKNavigationHandler*)navigationHandler {
[self displayWebView];
}
- (void)navigationHandlerDidStartLoading:
(CRWWKNavigationHandler*)navigationHandler {
[self didStartLoading];
}
- (void)navigationHandlerWebProcessDidCrash:
(CRWWKNavigationHandler*)navigationHandler {
self.webStateImpl->CancelDialogs();
self.webStateImpl->OnRenderProcessGone();
}
- (void)navigationHandler:(CRWWKNavigationHandler*)navigationHandler
loadCurrentURLWithRendererInitiatedNavigation:(BOOL)rendererInitiated {
[self loadCurrentURLWithRendererInitiatedNavigation:rendererInitiated];
}
- (void)navigationHandler:(CRWWKNavigationHandler*)navigationHandler
didCompleteLoadWithSuccess:(BOOL)loadSuccess
forContext:(web::NavigationContextImpl*)context {
[self loadCompleteWithSuccess:loadSuccess forContext:context];
}
- (void)resumeDownloadWithData:(NSData*)data
completionHandler:(void (^)(WKDownload*))completionHandler {
// Reports some failure to higher level code if `webView` doesn't exist
if (!_webView) {
completionHandler(nil);
return;
}
[_webView resumeDownloadFromResumeData:data
completionHandler:completionHandler];
}
#pragma mark - CRWWebRequestControllerDelegate
- (void)webRequestControllerStopLoading:
(CRWWebRequestController*)requestController {
[self stopLoading];
}
- (void)webRequestControllerDidStartLoading:
(CRWWebRequestController*)requestController {
[self didStartLoading];
}
- (CRWWKNavigationHandler*)webRequestControllerNavigationHandler:
(CRWWebRequestController*)requestController {
return self.navigationHandler;
}
#pragma mark - CRWInputViewProvider
- (id<CRWResponderInputView>)responderInputView {
web::WebState* webState = self.webStateImpl;
if (webState && webState->GetDelegate()) {
return webState->GetDelegate()->GetResponderInputView(webState);
}
return nil;
}
#pragma mark - UIDropInteractionDelegate
- (BOOL)dropInteraction:(UIDropInteraction*)interaction
canHandleSession:(id<UIDropSession>)session {
return session.items.count == 1U &&
[session canLoadObjectsOfClass:[NSURL class]];
}
- (UIDropProposal*)dropInteraction:(UIDropInteraction*)interaction
sessionDidUpdate:(id<UIDropSession>)session {
return [[UIDropProposal alloc] initWithDropOperation:UIDropOperationCopy];
}
- (void)dropInteraction:(UIDropInteraction*)interaction
performDrop:(id<UIDropSession>)session {
DCHECK_EQ(1U, session.items.count);
if ([session canLoadObjectsOfClass:[NSURL class]]) {
__weak CRWWebController* weakSelf = self;
[session loadObjectsOfClass:[NSURL class]
completion:^(NSArray<NSURL*>* objects) {
[weakSelf loadUrlObjectsCompletion:objects];
}];
}
}
- (void)loadUrlObjectsCompletion:(NSArray<NSURL*>*)objects {
GURL URL = net::GURLWithNSURL([objects firstObject]);
if (!_isBeingDestroyed && URL.is_valid() && URL.SchemeIsHTTPOrHTTPS()) {
web::NavigationManager::WebLoadParams params(URL);
params.transition_type = ui::PAGE_TRANSITION_TYPED;
self.webStateImpl->GetNavigationManager()->LoadURLWithParams(params);
}
}
#pragma mark - Testing-Only Methods
- (void)injectWebViewContentView:(CRWWebViewContentView*)webViewContentView {
_currentURLLoadWasTrigerred = NO;
[self removeWebView];
[_containerView displayWebViewContentView:webViewContentView];
[self setWebView:static_cast<WKWebView*>(webViewContentView.webView)];
}
- (void)resetInjectedWebViewContentView {
_currentURLLoadWasTrigerred = NO;
[self setWebView:nil];
[_containerView removeFromSuperview];
_containerView = nil;
}
- (web::WKNavigationState)navigationState {
return self.navigationHandler.navigationState;
}
@end
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