Upstream Chrome on iOS source code [7/11].

ios/chrome/browser/ui/reader_mode/reader_mode_view.mm

+// Copyright 2015 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/reader_mode/reader_mode_view.h"
+
+#include "base/mac/objc_property_releaser.h"
+#include "base/mac/scoped_nsobject.h"
+#include "ios/chrome/browser/dom_distiller/distiller_viewer.h"
+#import "ios/chrome/browser/ui/material_components/activity_indicator.h"
+#import "ios/third_party/material_components_ios/src/components/ActivityIndicator/src/MaterialActivityIndicator.h"
+
+namespace {
+const CGFloat kCloseButtonSize = 40;
+const CGFloat kCloseButtonMargin = 10;
+const CGFloat kMinWidth = kCloseButtonSize + kCloseButtonMargin * 2;
+const CGFloat kMinHeight = kMinWidth;
+}  // namespace
+
+@interface ReaderModeView ()<MDCActivityIndicatorDelegate> {
+  std::unique_ptr<dom_distiller::DistillerViewer> _viewer;
+  base::mac::ObjCPropertyReleaser _propertyReleaser_ReaderModeView;
+}
+@property(nonatomic, retain) MDCActivityIndicator* activityIndicator;
+@property(nonatomic, copy) ProceduralBlock animateOutCompletionBlock;
+@property(nonatomic, retain) UIButton* closeButton;
+
+@end
+
+@implementation ReaderModeView
+@synthesize activityIndicator = _activityIndicator;
+@synthesize animateOutCompletionBlock = _animateOutCompletionBlock;
+@synthesize closeButton = _closeButton;
+@synthesize delegate = _delegate;
+
+- (instancetype)initWithFrame:(CGRect)frame
+                     delegate:(id<ReaderModeViewDelegate>)delegate {
+  self = [super initWithFrame:frame];
+  if (self) {
+    _propertyReleaser_ReaderModeView.Init(self, [ReaderModeView class]);
+    _delegate = delegate;
+
+    self.backgroundColor = [UIColor whiteColor];
+
+    self.autoresizingMask =
+        UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+
+    _closeButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
+    [_closeButton addTarget:self
+                     action:@selector(close)
+           forControlEvents:UIControlEventTouchUpInside];
+    [_closeButton setTitle:@"X" forState:UIControlStateNormal];
+    _closeButton.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin |
+                                    UIViewAutoresizingFlexibleTopMargin;
+
+    _activityIndicator =
+        [[MDCActivityIndicator alloc] initWithFrame:CGRectMake(0, 0, 24, 24)];
+    _activityIndicator.delegate = self;
+    _activityIndicator.cycleColors = ActivityIndicatorBrandedCycleColors();
+    _activityIndicator.autoresizingMask =
+        UIViewAutoresizingFlexibleLeftMargin |
+        UIViewAutoresizingFlexibleTopMargin |
+        UIViewAutoresizingFlexibleRightMargin |
+        UIViewAutoresizingFlexibleBottomMargin;
+
+    [self addSubview:_closeButton];
+    [self addSubview:_activityIndicator];
+    [self sizeToFit];
+  }
+  return self;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  NOTREACHED();
+  return nil;
+}
+
+- (instancetype)initWithCoder:(NSCoder*)aDecoder {
+  NOTREACHED();
+  return nil;
+}
+
+- (void)start {
+  [self.activityIndicator startAnimating];
+}
+
+- (void)stopWaitingWithCompletion:(ProceduralBlock)completion {
+  if (self.activityIndicator.isAnimating) {
+    self.animateOutCompletionBlock = completion;
+    [self.activityIndicator stopAnimating];
+  } else if (completion) {
+    completion();
+  }
+}
+
+- (void)close {
+  [self.delegate exitReaderMode];
+}
+
+- (void)assignDistillerViewer:
+    (std::unique_ptr<dom_distiller::DistillerViewer>)viewer {
+  _viewer.reset(viewer.release());
+}
+
+- (void)layoutSubviews {
+  [super layoutSubviews];
+
+  self.closeButton.frame = CGRectMake(
+      self.bounds.size.width - kCloseButtonSize - kCloseButtonMargin,
+      self.bounds.size.height - kCloseButtonSize - kCloseButtonMargin,
+      kCloseButtonSize, kCloseButtonSize);
+  self.activityIndicator.center = CGPointMake(CGRectGetWidth(self.bounds) / 2,
+                                              CGRectGetHeight(self.bounds) / 2);
+}
+
+- (CGSize)sizeThatFits:(CGSize)size {
+  CGSize newSize = [super sizeThatFits:size];
+  if (newSize.width < kMinWidth)
+    newSize.width = kMinWidth;
+  if (newSize.height < kMinHeight)
+    newSize.height = kMinHeight;
+
+  return newSize;
+}
+
+#pragma mark - MDCActivityIndicatorDelegate
+
+- (void)activityIndicatorAnimationDidFinish:
+    (MDCActivityIndicator*)activityIndicator {
+  [self.activityIndicator removeFromSuperview];
+  self.activityIndicator = nil;
+  if (self.animateOutCompletionBlock)
+    self.animateOutCompletionBlock();
+  self.animateOutCompletionBlock = nil;
+}
+
+@end