Upstream Chrome on iOS source code [6/11].

ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.mm

Index: ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.mm
diff --git a/ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.mm b/ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.mm
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index 0000000000000000000000000000000000000000..eeea4f0053cee78b14cc96f95226d5362078ef1e
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+++ b/ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.mm
@@ -0,0 +1,190 @@
+// 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.
+
+#include "ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.h"
+
+#include "base/logging.h"
+#include "base/strings/sys_string_conversions.h"
+#include "ios/chrome/browser/ui/ntp/recent_tabs/synced_sessions.h"
+#include "ios/chrome/browser/ui/ntp/recent_tabs/views/disclosure_view.h"
+#include "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
+#include "ios/chrome/browser/ui/rtl_geometry.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
+#include "ios/chrome/grit/ios_strings.h"
+#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
+#import "ios/third_party/material_roboto_font_loader_ios/src/src/MaterialRobotoFontLoader.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+#include "ui/base/l10n/time_format.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace {
+
+// Desired height of the view.
+const CGFloat kDesiredHeight = 72;
+
+// The UI displays relative time for up to this number of hours and then
+// switches to absolute values.
+const int kRelativeTimeMaxHours = 4;
+
+}  // namespace
+
+@interface SessionSectionHeaderView () {
+  UIImageView* _deviceIcon;
+  UILabel* _nameLabel;
+  UILabel* _timeLabel;
+  DisclosureView* _disclosureView;
+}
+
+// Returns a relative string (e.g. 15 mins ago) if the time passed in is within
+// the last 4 hours. Returns the full formatted time in short style otherwise.
+- (NSString*)relativeTimeStringForTime:(base::Time)time;
+
+@end
+
+@implementation SessionSectionHeaderView
+
+- (instancetype)initWithFrame:(CGRect)aRect sectionIsCollapsed:(BOOL)collapsed {
+  self = [super initWithFrame:aRect];
+  if (self) {
+    _deviceIcon = [[UIImageView alloc] initWithImage:nil];
+    [_deviceIcon setTranslatesAutoresizingMaskIntoConstraints:NO];
+
+    _nameLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+    [_nameLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
+    [_nameLabel setHighlightedTextColor:[_nameLabel textColor]];
+    [_nameLabel setTextAlignment:NSTextAlignmentNatural];
+    [_nameLabel
+        setFont:[[MDFRobotoFontLoader sharedInstance] regularFontOfSize:16]];
+    [_nameLabel setBackgroundColor:[UIColor whiteColor]];
+    [_nameLabel
+        setContentCompressionResistancePriority:UILayoutPriorityDefaultLow
+                                        forAxis:
+                                            UILayoutConstraintAxisHorizontal];
+
+    _timeLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+    [_timeLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
+    [_timeLabel setTextAlignment:NSTextAlignmentNatural];
+    [_timeLabel setFont:[MDCTypography captionFont]];
+    [_timeLabel setHighlightedTextColor:[_timeLabel textColor]];
+    [_timeLabel setBackgroundColor:[UIColor whiteColor]];
+
+    _disclosureView = [[DisclosureView alloc] init];
+    [_disclosureView setTranslatesAutoresizingMaskIntoConstraints:NO];
+
+    [self addSubview:_deviceIcon];
+    [self addSubview:_nameLabel];
+    [self addSubview:_timeLabel];
+    [self addSubview:_disclosureView];
+
+    NSDictionary* viewsDictionary = @{
+      @"deviceIcon" : _deviceIcon,
+      @"nameLabel" : _nameLabel,
+      @"timeLabel" : _timeLabel,
+      @"disclosureView" : _disclosureView,
+    };
+
+    NSArray* constraints = @[
+      @"H:|-16-[deviceIcon]-16-[nameLabel]-(>=16)-[disclosureView]-16-|",
+      @"V:|-16-[nameLabel]-5-[timeLabel]-16-|",
+      @"H:[deviceIcon]-16-[timeLabel]",
+    ];
+    ApplyVisualConstraintsWithOptions(constraints, viewsDictionary,
+                                      LayoutOptionForRTLSupport(), self);
+    [self addConstraint:[NSLayoutConstraint
+                            constraintWithItem:_disclosureView
+                                     attribute:NSLayoutAttributeCenterY
+                                     relatedBy:NSLayoutRelationEqual
+                                        toItem:self
+                                     attribute:NSLayoutAttributeCenterY
+                                    multiplier:1.0
+                                      constant:0]];
+    [self addConstraint:[NSLayoutConstraint
+                            constraintWithItem:_deviceIcon
+                                     attribute:NSLayoutAttributeCenterY
+                                     relatedBy:NSLayoutRelationEqual
+                                        toItem:_nameLabel
+                                     attribute:NSLayoutAttributeCenterY
+                                    multiplier:1.0
+                                      constant:0]];
+    [self setSectionIsCollapsed:collapsed animated:NO];
+  }
+  // TODO(jif): Add timer that refreshes the time label.
+  return self;
+}
+
+- (void)updateWithSession:
+    (synced_sessions::DistantSession const*)distantSession {
+  NSString* imageName = nil;
+  switch (distantSession->device_type) {
+    case sync_sessions::SyncedSession::TYPE_PHONE:
+      imageName = @"ntp_opentabs_phone";
+      break;
+    case sync_sessions::SyncedSession::TYPE_TABLET:
+      imageName = @"ntp_opentabs_tablet";
+      break;
+    default:
+      imageName = @"ntp_opentabs_laptop";
+      break;
+  }
+  [_deviceIcon
+      setImage:[[UIImage imageNamed:imageName]
+                   imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]];
+  [_nameLabel setText:base::SysUTF8ToNSString(distantSession->name)];
+
+  NSDate* lastUsedDate = [NSDate
+      dateWithTimeIntervalSince1970:distantSession->modified_time.ToTimeT()];
+  NSString* timeString =
+      [self relativeTimeStringForTime:distantSession->modified_time];
+  NSString* dateString =
+      [NSDateFormatter localizedStringFromDate:lastUsedDate
+                                     dateStyle:NSDateFormatterShortStyle
+                                     timeStyle:NSDateFormatterNoStyle];
+  NSString* timeDateString =
+      [NSString stringWithFormat:@"%@ %@", timeString, dateString];
+
+  [_timeLabel setText:l10n_util::GetNSStringF(
+                          IDS_IOS_OPEN_TABS_LAST_USED,
+                          base::SysNSStringToUTF16(timeDateString))];
+}
+
+- (NSString*)relativeTimeStringForTime:(base::Time)time {
+  base::TimeDelta last_used_delta;
+  if (base::Time::Now() > time)
+    last_used_delta = base::Time::Now() - time;
+  if (last_used_delta.ToInternalValue() < base::Time::kMicrosecondsPerMinute)
+    return l10n_util::GetNSString(IDS_IOS_OPEN_TABS_RECENTLY_SYNCED);
+  if (last_used_delta.InHours() < kRelativeTimeMaxHours) {
+    return SysUTF16ToNSString(
+        ui::TimeFormat::Simple(ui::TimeFormat::FORMAT_ELAPSED,
+                               ui::TimeFormat::LENGTH_SHORT, last_used_delta));
+  }
+  NSDate* date = [NSDate dateWithTimeIntervalSince1970:time.ToTimeT()];
+  return [NSDateFormatter localizedStringFromDate:date
+                                        dateStyle:NSDateFormatterNoStyle
+                                        timeStyle:NSDateFormatterShortStyle];
+}
+
++ (CGFloat)desiredHeightInUITableViewCell {
+  return kDesiredHeight;
+}
+
+#pragma mark - HeaderOfCollapsableSectionProtocol
+
+- (void)setSectionIsCollapsed:(BOOL)collapsed animated:(BOOL)animated {
+  [_disclosureView setTransformWhenCollapsed:collapsed animated:animated];
+  UIColor* tintColor = (collapsed ? recent_tabs::GetIconColorGray()
+                                  : recent_tabs::GetIconColorBlue());
+  [self setTintColor:tintColor];
+  UIColor* textColor = (collapsed ? recent_tabs::GetTextColorGray()
+                                  : recent_tabs::GetTextColorBlue());
+  [_nameLabel setTextColor:textColor];
+  UIColor* subtitleColor = (collapsed ? recent_tabs::GetSubtitleColorGray()
+                                      : recent_tabs::GetSubtitleColorBlue());
+  [_timeLabel setTextColor:subtitleColor];
+}
+
+@end