Move FaviconAttributes to UI

ios/chrome/browser/favicon/favicon_attributes_provider.mm

-// Copyright 2016 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/favicon/favicon_attributes_provider.h"
-
-#include "base/logging.h"
-#include "base/mac/bind_objc_block.h"
-#include "base/strings/sys_string_conversions.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/task/cancelable_task_tracker.h"
-#include "components/favicon/core/fallback_url_util.h"
-#include "components/favicon/core/large_icon_service.h"
-#include "components/favicon_base/fallback_icon_style.h"
-#include "components/favicon_base/favicon_types.h"
-#include "skia/ext/skia_utils_ios.h"
-#include "url/gurl.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-@interface FaviconAttributesProvider () {
-  // Used to cancel tasks for the LargeIconService.
-  base::CancelableTaskTracker _faviconTaskTracker;
-}
-
-@end
-
-@implementation FaviconAttributesProvider
-@synthesize largeIconService = _largeIconService;
-@synthesize minSize = _minSize;
-@synthesize faviconSize = _faviconSize;
-
-- (instancetype)initWithFaviconSize:(CGFloat)faviconSize
-                     minFaviconSize:(CGFloat)minFaviconSize
-                   largeIconService:
-                       (favicon::LargeIconService*)largeIconService {
-  DCHECK(largeIconService);
-  self = [super init];
-  if (self) {
-    _faviconSize = faviconSize;
-    _minSize = minFaviconSize;
-    _largeIconService = largeIconService;
-  }
-
-  return self;
-}
-
-- (void)fetchFaviconAttributesForURL:(const GURL&)URL
-                          completion:(void (^)(FaviconAttributes*))completion {
-  GURL blockURL(URL);
-  void (^faviconBlock)(const favicon_base::LargeIconResult&) =
-      ^(const favicon_base::LargeIconResult& result) {
-        FaviconAttributes* attributes = nil;
-        if (result.bitmap.is_valid()) {
-          scoped_refptr<base::RefCountedMemory> data =
-              result.bitmap.bitmap_data.get();
-          UIImage* favicon =
-              [UIImage imageWithData:[NSData dataWithBytes:data->front()
-                                                    length:data->size()]];
-          attributes = [FaviconAttributes attributesWithImage:favicon];
-        } else if (result.fallback_icon_style) {
-          UIColor* backgroundColor = skia::UIColorFromSkColor(
-              result.fallback_icon_style->background_color);
-          UIColor* textColor =
-              skia::UIColorFromSkColor(result.fallback_icon_style->text_color);
-          NSString* monogram =
-              base::SysUTF16ToNSString(favicon::GetFallbackIconText(blockURL));
-          attributes =
-              [FaviconAttributes attributesWithMonogram:monogram
-                                              textColor:textColor
-                                        backgroundColor:backgroundColor];
-        }
-        DCHECK(attributes);
-        completion(attributes);
-      };
-
-  // Always call LargeIconService in case the favicon was updated.
-  CGFloat faviconSize = [UIScreen mainScreen].scale * self.faviconSize;
-  CGFloat minFaviconSize = [UIScreen mainScreen].scale * self.minSize;
-  self.largeIconService->GetLargeIconOrFallbackStyle(
-      URL, minFaviconSize, faviconSize, base::BindBlockArc(faviconBlock),
-      &_faviconTaskTracker);
-}
-@end