Upstream Chrome on iOS source code [8/11].

ios/chrome/browser/ui/static_content/static_html_native_content.mm

+// Copyright 2012 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/chrome/browser/ui/static_content/static_html_native_content.h"
+
+#include "base/logging.h"
+#import "base/mac/scoped_nsobject.h"
+#import "ios/chrome/browser/ui/overscroll_actions/overscroll_actions_controller.h"
+#include "ios/chrome/browser/ui/static_content/static_html_view_controller.h"
+#import "ios/chrome/browser/ui/url_loader.h"
+#include "ios/web/public/referrer.h"
+
+@interface StaticHtmlNativeContent ()
+// Designated initializer.
+- (instancetype)initWithLoader:(id<UrlLoader>)loader
+      staticHTMLViewController:(StaticHtmlViewController*)HTMLViewController
+                           URL:(const GURL&)URL;
+@end
+
+@implementation StaticHtmlNativeContent {
+  // The url of the controller.
+  GURL _URL;
+  // YES is web views are allowed to be created.
+  BOOL _webUsageEnabled;
+  // The static HTML view controller that is used to display the content in
+  // a web view.
+  base::scoped_nsobject<StaticHtmlViewController> _staticHTMLViewController;
+  // Responsible for loading a particular URL.
+  id<UrlLoader> _loader;  // weak
+  // The controller handling the overscroll actions.
+  base::scoped_nsobject<OverscrollActionsController>
+      _overscrollActionsController;
+}
+
+#pragma mark -
+#pragma mark Public
+
+- (instancetype)initWithLoader:(id<UrlLoader>)loader
+      staticHTMLViewController:(StaticHtmlViewController*)HTMLViewController
+                           URL:(const GURL&)URL {
+  DCHECK(loader);
+  DCHECK(HTMLViewController);
+  // No DCHECK for URL (invalid URL is a valid input).
+  if (self = [super init]) {
+    web::Referrer referrer(URL, web::ReferrerPolicyDefault);
+    [HTMLViewController setLoader:loader referrer:referrer];
+    _URL = URL;
+    _loader = loader;
+    _staticHTMLViewController.reset([HTMLViewController retain]);
+  }
+  return self;
+}
+
+- (instancetype)initWithResourcePathResource:(NSString*)resourcePath
+                                      loader:(id<UrlLoader>)loader
+                                browserState:(web::BrowserState*)browserState
+                                         url:(const GURL&)URL {
+  DCHECK(loader);
+  DCHECK(browserState);
+  DCHECK(URL.is_valid());
+  DCHECK(resourcePath);
+  base::scoped_nsobject<StaticHtmlViewController> HTMLViewController(
+      [[StaticHtmlViewController alloc] initWithResource:resourcePath
+                                            browserState:browserState]);
+  return [self initWithLoader:loader
+      staticHTMLViewController:HTMLViewController
+                           URL:URL];
+}
+
+- (void)loadURL:(const GURL&)URL
+             referrer:(const web::Referrer&)referrer
+           transition:(ui::PageTransition)transition
+    rendererInitiated:(BOOL)rendererInitiated {
+  [_loader loadURL:URL
+               referrer:referrer
+             transition:transition
+      rendererInitiated:rendererInitiated];
+}
+
+- (OverscrollActionsController*)overscrollActionsController {
+  return _overscrollActionsController.get();
+}
+
+- (void)setOverscrollActionsController:
+    (OverscrollActionsController*)controller {
+  _overscrollActionsController.reset([controller retain]);
+}
+
+#pragma mark -
+#pragma mark CRWNativeContent implementation
+
+- (void)close {
+  [_overscrollActionsController invalidate];
+}
+
+- (void)willUpdateSnapshot {
+  [_overscrollActionsController clear];
+}
+
+- (const GURL&)url {
+  return _URL;
+}
+
+- (UIView*)view {
+  CHECK(_webUsageEnabled) << "Tried to create a web view when web usage was"
+                          << " disabled!";
+  return [_staticHTMLViewController webView];
+}
+
+- (NSString*)title {
+  return [_staticHTMLViewController title];
+}
+
+- (void)reload {
+  [_staticHTMLViewController reload];
+}
+
+- (void)handleLowMemory {
+  [_staticHTMLViewController handleLowMemory];
+}
+
+- (BOOL)isViewAlive {
+  return [_staticHTMLViewController isViewAlive];
+}
+
+- (void)executeJavaScript:(NSString*)script
+        completionHandler:(web::JavaScriptResultBlock)handler {
+  [_staticHTMLViewController executeJavaScript:script
+                             completionHandler:handler];
+}
+
+- (void)setScrollEnabled:(BOOL)enabled {
+  [_staticHTMLViewController setScrollEnabled:enabled];
+}
+
+- (void)setWebUsageEnabled:(BOOL)webUsageEnabled {
+  if (_webUsageEnabled == webUsageEnabled) {
+    return;
+  }
+  _webUsageEnabled = webUsageEnabled;
+  if (!_webUsageEnabled) {
+    _staticHTMLViewController.reset();
+  }
+}
+
+- (UIScrollView*)scrollView {
+  return [_staticHTMLViewController scrollView];
+}
+
+@end