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// Copyright 2014 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 "ios/web/web_state/web_view_internal_creation_util.h"
#import <objc/runtime.h>
#import <WebKit/WebKit.h>
#include "base/logging.h"
#include "base/mac/scoped_nsobject.h"
#include "base/strings/sys_string_conversions.h"
#import "ios/web/alloc_with_zone_interceptor.h"
#include "ios/web/public/active_state_manager.h"
#include "ios/web/public/browser_state.h"
#import "ios/web/public/browsing_data_partition.h"
#include "ios/web/public/web_client.h"
#import "ios/web/public/web_view_counter.h"
#import "ios/web/public/web_view_creation_util.h"
#import "ios/web/weak_nsobject_counter.h"
#import "ios/web/web_state/ui/crw_wk_simple_web_view_controller.h"
#import "ios/web/web_state/ui/wk_web_view_configuration_provider.h"
#import "ios/web/web_view_counter_impl.h"
#if !defined(NDEBUG)
namespace {
// Returns the counter of all the active WKWebViews.
// DEPRECATED. Please use web::WebViewCounter instead.
// TODO(shreyasv): Remove this once all callers have stopped using it.
// crbug.com/480507
web::WeakNSObjectCounter& GetActiveWKWebViewCounter() {
static web::WeakNSObjectCounter active_wk_web_view_counter;
return active_wk_web_view_counter;
}
// Decides if web views can be created.
bool gAllowWebViewCreation = NO;
// Decides if web views are associated with an ActiveStateManager which is
// active.
bool gWebViewsNeedActiveStateManager = NO;
} // namespace
@interface WKWebView (CRWAdditions)
@end
@implementation WKWebView (CRWAdditions)
+ (void)load {
id (^allocator)(Class klass, NSZone* zone) = ^id(Class klass, NSZone* zone) {
if (web::IsWebViewAllocInitAllowed()) {
return NSAllocateObject(klass, 0, zone);
}
// You have hit this because you are trying to create a WKWebView directly.
// Please use one of the web::CreateWKWKWebView methods that vend a
// WKWebView instead.
NOTREACHED();
return nil;
};
web::AddAllocWithZoneMethod([WKWebView class], allocator);
}
@end
#endif // !defined(NDEBUG)
namespace web {
namespace {
// Verifies the preconditions for creating a WKWebView. Must be called before
// a WKWebView is allocated. Not verifying the preconditions before creating
// a WKWebView will lead to undefined behavior.
void VerifyWKWebViewCreationPreConditions(
BrowserState* browser_state,
WKWebViewConfiguration* configuration) {
DCHECK(browser_state);
DCHECK(configuration);
DCHECK(web::BrowsingDataPartition::IsSynchronized());
WKWebViewConfigurationProvider& config_provider =
WKWebViewConfigurationProvider::FromBrowserState(browser_state);
DCHECK_EQ([config_provider.GetWebViewConfiguration() processPool],
[configuration processPool]);
}
// Called before a WKWebView is created.
void PreWKWebViewCreation(BrowserState* browser_state) {
DCHECK(browser_state);
DCHECK(GetWebClient());
GetWebClient()->PreWebViewCreation();
#if !defined(NDEBUG)
if (IsWebViewAllocInitAllowed() && gWebViewsNeedActiveStateManager) {
DCHECK(BrowserState::GetActiveStateManager(browser_state)->IsActive());
}
#endif
}
// Called after the WKWebView |web_view| is created.
void PostWKWebViewCreation(WKWebView* web_view, BrowserState* browser_state) {
DCHECK(web_view);
#if !defined(NDEBUG)
GetActiveWKWebViewCounter().Insert(web_view);
#endif
WebViewCounterImpl* web_view_counter =
WebViewCounterImpl::FromBrowserState(browser_state);
DCHECK(web_view_counter);
web_view_counter->InsertWKWebView(web_view);
// TODO(stuartmorgan): Figure out how to make this work; two different client
// methods for the two web view types?
// web::GetWebClient()->PostWebViewCreation(result);
}
} // namespace
UIWebView* CreateWebView(CGRect frame) {
DCHECK(web::GetWebClient());
web::GetWebClient()->PreWebViewCreation();
UIWebView* result = [[UIWebView alloc] initWithFrame:frame];
// Disable data detector types. Safari does the same.
[result setDataDetectorTypes:UIDataDetectorTypeNone];
[result setScalesPageToFit:YES];
// By default UIWebView uses a very sluggish scroll speed. Set it to a more
// reasonable value.
result.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
web::GetWebClient()->PostWebViewCreation(result);
return result;
}
WKWebView* CreateWKWebView(CGRect frame,
WKWebViewConfiguration* configuration,
BrowserState* browser_state,
BOOL use_desktop_user_agent) {
WKWebView* web_view = CreateWKWebView(frame, configuration, browser_state);
DCHECK(web::GetWebClient());
web_view.customUserAgent = base::SysUTF8ToNSString(
web::GetWebClient()->GetUserAgent(use_desktop_user_agent));
return web_view;
}
WKWebView* CreateWKWebView(CGRect frame,
WKWebViewConfiguration* configuration,
BrowserState* browser_state) {
VerifyWKWebViewCreationPreConditions(browser_state, configuration);
PreWKWebViewCreation(browser_state);
#if !defined(NDEBUG)
bool previous_allow_web_view_creation_value = gAllowWebViewCreation;
gAllowWebViewCreation = true;
#endif
WKWebView* result =
[[WKWebView alloc] initWithFrame:frame configuration:configuration];
#if !defined(NDEBUG)
gAllowWebViewCreation = previous_allow_web_view_creation_value;
#endif
PostWKWebViewCreation(result, browser_state);
// By default the web view uses a very sluggish scroll speed. Set it to a more
// reasonable value.
result.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
return result;
}
NSUInteger GetActiveWKWebViewsCount() {
#if defined(NDEBUG)
// This should not be used in release builds.
CHECK(0);
return 0;
#else
return GetActiveWKWebViewCounter().Size();
#endif
}
id<CRWSimpleWebViewController> CreateSimpleWebViewController(
CGRect frame,
BrowserState* browser_state) {
DCHECK(web::BrowsingDataPartition::IsSynchronized());
base::scoped_nsobject<WKWebView> web_view(
web::CreateWKWebView(frame, browser_state));
return [[CRWWKSimpleWebViewController alloc] initWithWKWebView:web_view];
}
#if !defined(NDEBUG)
bool IsWebViewAllocInitAllowed() {
static dispatch_once_t once_token = 0;
dispatch_once(&once_token, ^{
DCHECK(GetWebClient());
gAllowWebViewCreation = GetWebClient()->AllowWebViewAllocInit();
if (!gAllowWebViewCreation) {
gWebViewsNeedActiveStateManager =
GetWebClient()->WebViewsNeedActiveStateManager();
}
});
return gAllowWebViewCreation;
}
#endif
} // namespace web
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