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

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

Index: ios/chrome/browser/ui/ntp/recent_tabs/views/generic_section_header_view.mm
diff --git a/ios/chrome/browser/ui/ntp/recent_tabs/views/generic_section_header_view.mm b/ios/chrome/browser/ui/ntp/recent_tabs/views/generic_section_header_view.mm
new file mode 100644
index 0000000000000000000000000000000000000000..511b962493aaaba2fbb7de809b2f632b78cdd8b4
--- /dev/null
+++ b/ios/chrome/browser/ui/ntp/recent_tabs/views/generic_section_header_view.mm
@@ -0,0 +1,141 @@
+// 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/generic_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"
+#import "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_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 = 48;
+
+}  // namespace
+
+@interface GenericSectionHeaderView () {
+  DisclosureView* _disclosureView;
+  UIImageView* _icon;
+  UILabel* _label;
+}
+@end
+
+@implementation GenericSectionHeaderView
+
+- (instancetype)initWithFrame:(CGRect)aRect {
+  NOTREACHED();
+  return nil;
+}
+
+- (instancetype)initWithType:(recent_tabs::SectionHeaderType)type
+          sectionIsCollapsed:(BOOL)collapsed {
+  self = [super initWithFrame:CGRectZero];
+  if (self) {
+    _icon = [[UIImageView alloc] initWithImage:nil];
+    [_icon setTranslatesAutoresizingMaskIntoConstraints:NO];
+    _label = [[UILabel alloc] initWithFrame:CGRectZero];
+    [_label setTranslatesAutoresizingMaskIntoConstraints:NO];
+    [_label
+        setFont:[[MDFRobotoFontLoader sharedInstance] regularFontOfSize:16]];
+    [_label setTextAlignment:NSTextAlignmentNatural];
+    [_label setBackgroundColor:[UIColor whiteColor]];
+
+    NSString* text = nil;
+    NSString* imageName = nil;
+    switch (type) {
+      case recent_tabs::RECENTLY_CLOSED_TABS_SECTION_HEADER:
+        text = l10n_util::GetNSString(IDS_IOS_RECENT_TABS_RECENTLY_CLOSED);
+        imageName = @"ntp_recently_closed";
+        break;
+      case recent_tabs::OTHER_DEVICES_SECTION_HEADER:
+        text = l10n_util::GetNSString(IDS_IOS_RECENT_TABS_OTHER_DEVICES);
+        imageName = @"ntp_opentabs_laptop";
+        break;
+    }
+    DCHECK(text);
+    DCHECK(imageName);
+    [_label setText:text];
+    [_icon setImage:
+               [[UIImage imageNamed:imageName]
+                   imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]];
+
+    self.isAccessibilityElement = YES;
+    self.accessibilityLabel = [_label accessibilityLabel];
+    self.accessibilityTraits |=
+        UIAccessibilityTraitButton | UIAccessibilityTraitHeader;
+
+    _disclosureView = [[DisclosureView alloc] init];
+    [_disclosureView setTranslatesAutoresizingMaskIntoConstraints:NO];
+
+    [self addSubview:_icon];
+    [self addSubview:_label];
+    [self addSubview:_disclosureView];
+
+    NSDictionary* viewsDictionary = @{
+      @"icon" : _icon,
+      @"label" : _label,
+      @"disclosureView" : _disclosureView,
+    };
+    NSArray* constraints = @[
+      @"H:|-16-[icon]-16-[label]-(>=16)-[disclosureView]-16-|",
+      @"V:|-12-[label]-12-|"
+    ];
+    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:_icon
+                                     attribute:NSLayoutAttributeCenterY
+                                     relatedBy:NSLayoutRelationEqual
+                                        toItem:_label
+                                     attribute:NSLayoutAttributeCenterY
+                                    multiplier:1.0
+                                      constant:0]];
+    [self setSectionIsCollapsed:collapsed animated:NO];
+  }
+  return self;
+}
+
++ (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());
+  [_label setTextColor:textColor];
+  self.accessibilityHint =
+      collapsed ? l10n_util::GetNSString(
+                      IDS_IOS_RECENT_TABS_DISCLOSURE_VIEW_COLLAPSED_HINT)
+                : l10n_util::GetNSString(
+                      IDS_IOS_RECENT_TABS_DISCLOSURE_VIEW_EXPANDED_HINT);
+}
+
+@end