Upstream Chrome on iOS source code [3/11].

ios/chrome/browser/ui/bookmarks/bookmark_collection_cells.mm

+// 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.
+
+#import "ios/chrome/browser/ui/bookmarks/bookmark_collection_cells.h"
+
+#import <QuartzCore/QuartzCore.h>
+
+#include "base/logging.h"
+#include "base/mac/objc_property_releaser.h"
+#include "base/mac/scoped_nsobject.h"
+#import "ios/chrome/browser/ui/bookmarks/bookmark_extended_button.h"
+#import "ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h"
+#import "ios/chrome/browser/ui/bookmarks/bookmark_utils_ios.h"
+#import "ios/chrome/browser/ui/rtl_geometry.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
+#include "ios/chrome/grit/ios_strings.h"
+#include "ios/chrome/grit/ios_theme_resources.h"
+#import "ios/third_party/material_components_ios/src/components/Ink/src/MaterialInk.h"
+#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+#include "ui/base/resource/resource_bundle.h"
+#import "ui/gfx/ios/NSString+CrStringDrawing.h"
+#include "url/gurl.h"
+
+namespace {
+const CGFloat kBookmarkItemCellDefaultImageSize = 40.0;
+const CGFloat kBookmarkFolderCellDefaultImageSize = 24.0;
+}  // namespace
+
+@interface BookmarkCell () {
+ @protected
+  // Subclasses should set these in the constructor with the wanted values.
+  CGFloat _imageSize;
+
+ @private
+  base::mac::ObjCPropertyReleaser _propertyReleaser_BookmarkCell;
+}
+// Redefined to be read-write.
+@property(nonatomic, retain) UILabel* titleLabel;
+// Redefined to readwrite.
+@property(nonatomic, retain) UIImageView* imageView;
+// Label to show placeholder text when there is no image displayed.
+@property(nonatomic, retain) UILabel* placeholderLabel;
+// When the cell is selected for editing, a cover is shown with a blue color.
+// Subclasses should insert new views below this view.
+@property(nonatomic, retain) UIView* highlightCover;
+// Lists the accessibility elements that are to be seen by UIAccessibility.
+@property(nonatomic, readonly) NSMutableArray* accessibilityElements;
+// Location of the last touch on the cell.
+@property(nonatomic, assign) CGPoint touchLocation;
+// The view doing the highlight animation. Only set while the cell is
+// highlighted.
+@property(nonatomic, retain) MDCInkView* touchFeedbackView;
+@property(nonatomic, retain) BookmarkExtendedButton* button;
+@property(nonatomic, assign) SEL buttonAction;
+@property(nonatomic, assign) id buttonTarget;
+@end
+
+@implementation BookmarkCell
+@synthesize accessibilityElements = _accessibilityElements;
+@synthesize titleLabel = _titleLabel;
+@synthesize imageView = _imageView;
+@synthesize highlightCover = _highlightCover;
+@synthesize shouldAnimateImageChanges = _shouldAnimateImageChanges;
+@synthesize touchLocation = _touchLocation;
+@synthesize touchFeedbackView = _touchFeedbackView;
+@synthesize button = _button;
+@synthesize buttonAction = _buttonAction;
+@synthesize buttonTarget = _buttonTarget;
+@synthesize placeholderLabel = _placeholderLabel;
+
++ (NSString*)reuseIdentifier {
+  NOTREACHED();
+  return nil;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  self = [super initWithFrame:frame];
+  if (self) {
+    _propertyReleaser_BookmarkCell.Init(self, [BookmarkCell class]);
+    self.exclusiveTouch = YES;
+    self.backgroundColor = [UIColor whiteColor];
+
+    _titleLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+    _titleLabel.textColor = bookmark_utils_ios::darkTextColor();
+    self.titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
+    [self.contentView addSubview:_titleLabel];
+
+    _imageView = [[UIImageView alloc] initWithFrame:CGRectZero];
+    _imageView.clipsToBounds = YES;
+    self.imageView.translatesAutoresizingMaskIntoConstraints = NO;
+    [self.contentView addSubview:_imageView];
+
+    _placeholderLabel = [[UILabel alloc] init];
+    _placeholderLabel.textAlignment = NSTextAlignmentCenter;
+    [self.contentView addSubview:_placeholderLabel];
+
+    _highlightCover = [[UIView alloc] initWithFrame:CGRectZero];
+    _highlightCover.backgroundColor =
+        [bookmark_utils_ios::blueColor() colorWithAlphaComponent:0.7];
+    _highlightCover.hidden = YES;
+    _highlightCover.translatesAutoresizingMaskIntoConstraints = NO;
+    [self.contentView addSubview:_highlightCover];
+
+    self.button = base::scoped_nsobject<BookmarkExtendedButton>(
+        [[BookmarkExtendedButton alloc] init]);
+    self.button.contentMode = UIViewContentModeCenter;
+    self.button.backgroundColor = [UIColor clearColor];
+    [self.button addTarget:self
+                    action:@selector(buttonTapped:)
+          forControlEvents:UIControlEventTouchUpInside];
+    self.button.translatesAutoresizingMaskIntoConstraints = NO;
+    [self.contentView insertSubview:self.button
+                       belowSubview:self.highlightCover];
+
+    _accessibilityElements = [[NSMutableArray alloc] init];
+    self.contentView.isAccessibilityElement = YES;
+    self.contentView.accessibilityTraits |= UIAccessibilityTraitButton;
+    [_accessibilityElements addObject:self.contentView];
+    [self.accessibilityElements addObject:self.button];
+  }
+  return self;
+}
+
++ (BOOL)requiresConstraintBasedLayout {
+  return YES;
+}
+
+- (void)updateConstraints {
+  if (_imageSize) {
+    // Create constraints.
+
+    // Align all the views on the same horizontal line.
+    AddSameCenterYConstraint(self.contentView, self.titleLabel);
+    AddSameCenterYConstraint(self.contentView, self.imageView);
+    AddSameCenterYConstraint(self.contentView, self.button);
+
+    // clang-format off
+    ApplyVisualConstraintsWithMetrics(
+        @[
+          @"H:|-leadingImageMargin-[image(imageSize)]",
+          @"H:|-leadingMargin-[title]-[button(buttonSize)]|",
+          @"V:[image(imageSize)]",
+          @"V:[button(buttonSize)]",
+          @"H:|[highlight]|",
+          @"V:|[highlight]|"
+        ],
+        @{
+          @"title" : self.titleLabel,
+          @"image" : self.imageView,
+          @"button" : self.button,
+          @"highlight" : self.highlightCover
+        },
+        @{
+          @"buttonSize" : [NSNumber numberWithFloat:32.0],
+          @"leadingImageMargin" : [NSNumber numberWithFloat:16.0],
+          @"leadingMargin" : [NSNumber numberWithFloat:64.0],
+          @"imageSize" : [NSNumber numberWithFloat:_imageSize],
+        },
+        self.contentView);
+    // clang-format on
+  }
+
+  [NSLayoutConstraint activateConstraints:@[
+    [self.placeholderLabel.leadingAnchor
+        constraintEqualToAnchor:self.imageView.leadingAnchor],
+    [self.placeholderLabel.trailingAnchor
+        constraintEqualToAnchor:self.imageView.trailingAnchor],
+    [self.placeholderLabel.topAnchor
+        constraintEqualToAnchor:self.imageView.topAnchor],
+    [self.placeholderLabel.bottomAnchor
+        constraintEqualToAnchor:self.imageView.bottomAnchor]
+  ]];
+  self.placeholderLabel.translatesAutoresizingMaskIntoConstraints = NO;
+
+  [super updateConstraints];
+}
+
+- (void)setSelectedForEditing:(BOOL)selected animated:(BOOL)animated {
+  self.highlightCover.hidden = !selected;
+  if (selected)
+    self.contentView.accessibilityTraits |= UIAccessibilityTraitSelected;
+  else
+    self.contentView.accessibilityTraits &= ~UIAccessibilityTraitSelected;
+}
+
+- (void)setImage:(UIImage*)image {
+  self.imageView.image = image;
+  self.placeholderLabel.hidden = YES;
+  self.imageView.hidden = NO;
+
+  if (!self.shouldAnimateImageChanges)
+    return;
+
+  CATransition* transition = [CATransition animation];
+  transition.duration = 0.2f;
+  transition.timingFunction = [CAMediaTimingFunction
+      functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
+  transition.type = kCATransitionFade;
+  [self.imageView.layer addAnimation:transition forKey:nil];
+}
+
+- (void)setPlaceholderText:(NSString*)text
+                 textColor:(UIColor*)textColor
+           backgroundColor:(UIColor*)backgroundColor {
+  self.placeholderLabel.hidden = NO;
+  self.imageView.hidden = YES;
+
+  self.placeholderLabel.backgroundColor = backgroundColor;
+  self.placeholderLabel.textColor = textColor;
+  self.placeholderLabel.text = text;
+}
+
+- (void)prepareForReuse {
+  self.imageView.image = nil;
+  self.imageView.backgroundColor = [UIColor whiteColor];
+  self.highlightCover.hidden = YES;
+  self.shouldAnimateImageChanges = NO;
+  [self.touchFeedbackView cancelAllAnimationsAnimated:NO];
+  [self.touchFeedbackView removeFromSuperview];
+  self.touchFeedbackView = nil;
+  [self updateWithTitle:nil];
+  self.placeholderLabel.hidden = YES;
+  self.imageView.hidden = NO;
+
+  [super prepareForReuse];
+}
+
+- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {
+  UITouch* touch = [touches anyObject];
+  self.touchLocation = [touch locationInView:self];
+  [super touchesBegan:touches withEvent:event];
+}
+
+- (void)touchesEnded:(NSSet*)touches withEvent:(UIEvent*)event {
+  UITouch* touch = [touches anyObject];
+  self.touchLocation = [touch locationInView:self];
+  [super touchesEnded:touches withEvent:event];
+}
+
+- (void)setHighlighted:(BOOL)highlighted {
+  [super setHighlighted:highlighted];
+
+  // To prevent selection messing up with ink, immediately remove ink.
+  [self.touchFeedbackView removeFromSuperview];
+  self.touchFeedbackView = nil;
+
+  if (highlighted) {
+    // Creates an ink feedback and animates it.
+    base::scoped_nsobject<MDCInkView> touchFeedbackView(
+        [[MDCInkView alloc] initWithFrame:self.bounds]);
+    [self addSubview:touchFeedbackView];
+    self.touchFeedbackView = touchFeedbackView;
+    [self.touchFeedbackView startTouchBeganAnimationAtPoint:self.touchLocation
+                                                 completion:nil];
+  } else {
+    [self.touchFeedbackView startTouchEndedAnimationAtPoint:self.touchLocation
+                                                 completion:nil];
+  }
+}
+
+- (void)updateWithTitle:(NSString*)title {
+  self.titleLabel.text = title;
+  [self setNeedsLayout];
+  [self updateAccessibilityValues];
+}
+
+#pragma mark - Button
+- (void)setButtonTarget:(id)target action:(SEL)action {
+  self.buttonTarget = target;
+  self.buttonAction = action;
+}
+
+- (void)buttonTapped:(id)target {
+  [self.buttonTarget performSelector:self.buttonAction
+                          withObject:self
+                          withObject:target];
+}
+
+- (void)showButtonOfType:(bookmark_cell::ButtonType)buttonType
+                animated:(BOOL)animated {
+  switch (buttonType) {
+    case bookmark_cell::ButtonNone:
+      [self removeButtonAnimated:animated];
+      break;
+
+    case bookmark_cell::ButtonMenu: {
+      ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+      UIImage* bgImage =
+          rb.GetNativeImageNamed(IDR_IOS_TOOLBAR_LIGHT_TOOLS).ToUIImage();
+      [self addButtonWithImage:bgImage animated:animated];
+      break;
+    }
+  }
+}
+
+- (void)addButtonWithImage:(UIImage*)image animated:(BOOL)animated {
+  // Set the image.
+  [self.button setImage:image forState:UIControlStateNormal];
+
+  // Animates the button in.
+  [UIView animateWithDuration:animated ? 0.15 : 0
+      delay:0
+      options:UIViewAnimationOptionBeginFromCurrentState
+      animations:^{
+        self.button.alpha = 1.0;
+      }
+      completion:^(BOOL finished) {
+        if (finished) {
+          // If this method is called twice in succession, the button should
+          // only be added once to |self.accessibilityElements|.
+          if (![self.accessibilityElements containsObject:self.button])
+            [self.accessibilityElements addObject:self.button];
+        }
+      }];
+}
+
+- (void)removeButtonAnimated:(BOOL)animated {
+  if (!self.button)
+    return;
+
+  [UIView animateWithDuration:animated ? 0.15 : 0
+      delay:0
+      options:UIViewAnimationOptionBeginFromCurrentState
+      animations:^{
+        self.button.alpha = 0.0;
+      }
+      completion:^(BOOL finished) {
+        if (finished) {
+          [self.accessibilityElements removeObject:self.button];
+        }
+      }];
+}
+
+#pragma mark - Accessibility
+
+- (void)updateAccessibilityValues {
+  self.button.accessibilityIdentifier =
+      [NSString stringWithFormat:@"%@ %@", self.titleLabel.text, @"Info"];
+  self.button.accessibilityLabel = l10n_util::GetNSString(
+      IDS_IOS_BOOKMARK_NEW_MORE_BUTTON_ACCESSIBILITY_LABEL);
+}
+
+- (NSInteger)accessibilityElementCount {
+  return [self.accessibilityElements count];
+}
+
+- (id)accessibilityElementAtIndex:(NSInteger)index {
+  return [self.accessibilityElements objectAtIndex:index];
+}
+
+- (NSInteger)indexOfAccessibilityElement:(id)element {
+  return [self.accessibilityElements indexOfObject:element];
+}
+
+@end
+
+#pragma mark - BookmarkItemCell
+
+@interface BookmarkItemCell () {
+  base::mac::ObjCPropertyReleaser _propertyReleaser_BookmarkItemCell;
+}
+@end
+
+@implementation BookmarkItemCell
+
++ (NSString*)reuseIdentifier {
+  return @"BookmarkItemCell";
+}
+
++ (CGFloat)preferredImageSize {
+  return kBookmarkItemCellDefaultImageSize;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  self = [super initWithFrame:frame];
+  if (self) {
+    _propertyReleaser_BookmarkItemCell.Init(self, [BookmarkItemCell class]);
+
+    // Set the non-layout properties of the titles.
+    UIFont* font = [MDCTypography subheadFont];
+    self.titleLabel.font = font;
+    self.titleLabel.backgroundColor = [UIColor clearColor];
+    self.titleLabel.numberOfLines = 1;
+
+    _imageSize = kBookmarkItemCellDefaultImageSize;
+  }
+  return self;
+}
+
+- (void)updateWithTitle:(NSString*)title {
+  [super updateWithTitle:title];
+  [self updateAccessibilityValues];
+}
+
+- (void)updateAccessibilityValues {
+  [super updateAccessibilityValues];
+  self.contentView.accessibilityLabel =
+      [NSString stringWithFormat:@"%@", self.titleLabel.text];
+  self.contentView.accessibilityIdentifier = self.titleLabel.text;
+}
+
+- (void)prepareForReuse {
+  [super prepareForReuse];
+  [self updateAccessibilityValues];
+}
+
+@end
+
+#pragma mark - BookmarkFolderCell
+
+@interface BookmarkFolderCell () {
+  base::mac::ObjCPropertyReleaser _propertyReleaser_BookmarkFolderCell;
+}
+
+@end
+
+@implementation BookmarkFolderCell
+
++ (NSString*)reuseIdentifier {
+  return @"BookmarkFolderCell";
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  self = [super initWithFrame:frame];
+  if (self) {
+    _propertyReleaser_BookmarkFolderCell.Init(self, [BookmarkFolderCell class]);
+
+    self.imageView.image = [UIImage imageNamed:@"bookmark_gray_folder"];
+    self.titleLabel.font = [MDCTypography subheadFont];
+
+    _imageSize = kBookmarkFolderCellDefaultImageSize;
+  }
+  return self;
+}
+
+- (void)prepareForReuse {
+  [super prepareForReuse];
+  [self setImage:[UIImage imageNamed:@"bookmark_gray_folder"]];
+}
+
+- (void)updateWithTitle:(NSString*)title {
+  [super updateWithTitle:title];
+
+  self.contentView.accessibilityLabel = title;
+  self.contentView.accessibilityIdentifier = title;
+}
+
+@end
+
+#pragma mark - BookmarkHeaderView
+
+@interface BookmarkHeaderView () {
+  base::mac::ObjCPropertyReleaser _propertyReleaser_BookmarkHeaderView;
+}
+@property(nonatomic, retain) UILabel* titleLabel;
+@end
+
+@implementation BookmarkHeaderView
+@synthesize titleLabel = _titleLabel;
++ (NSString*)reuseIdentifier {
+  return @"BookmarkHeaderView";
+}
+
++ (CGFloat)handsetHeight {
+  return 47.0;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  self = [super initWithFrame:frame];
+  if (self) {
+    _propertyReleaser_BookmarkHeaderView.Init(self, [BookmarkHeaderView class]);
+    base::scoped_nsobject<UILabel> titleLabel(
+        [[UILabel alloc] initWithFrame:CGRectZero]);
+    self.titleLabel = titleLabel;
+    UIFont* font = [MDCTypography body2Font];
+    self.titleLabel.font = font;
+    self.titleLabel.textColor = bookmark_utils_ios::lightTextColor();
+    self.titleLabel.backgroundColor = [UIColor clearColor];
+    self.titleLabel.accessibilityTraits |= UIAccessibilityTraitHeader;
+    [self addSubview:self.titleLabel];
+  }
+  return self;
+}
+
+- (void)layoutSubviews {
+  [super layoutSubviews];
+
+  // On handsets the title is aligned with the icon in the navigation bar.
+  CGFloat margin = 16.0;
+  if (IsIPadIdiom())
+    margin = 24.0;  // On tablets the alignment is the same as the tiles.
+  self.titleLabel.frame =
+      CGRectMake(margin, 0, self.bounds.size.width - margin * 2.0,
+                 self.bounds.size.height);
+}
+
+- (void)setTitle:(NSString*)title {
+  self.titleLabel.text = title;
+}
+
+- (void)updateLayoutWithLeftMargin:(CGFloat)leftMargin {
+  self.titleLabel.frame =
+      CGRectMake(leftMargin, 0, self.bounds.size.width - leftMargin,
+                 self.bounds.size.height);
+}
+
+@end
+
+#pragma mark - BookmarkHeaderSeparatorView
+
+@interface BookmarkHeaderSeparatorView () {
+  base::mac::ObjCPropertyReleaser _propertyReleaser_BookmarkHeaderSeparatorView;
+}
+// The bottom separator line.
+@property(nonatomic, retain) UIView* lineView;
+@end
+
+@implementation BookmarkHeaderSeparatorView
+
+@synthesize lineView = _lineView;
+
++ (NSString*)reuseIdentifier {
+  return NSStringFromClass(self);
+}
+
++ (CGFloat)preferredHeight {
+  return 16;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  self = [super initWithFrame:frame];
+  if (self) {
+    _propertyReleaser_BookmarkHeaderSeparatorView.Init(
+        self, [BookmarkHeaderSeparatorView class]);
+    _lineView = [[UIView alloc] init];
+    _lineView.backgroundColor = bookmark_utils_ios::separatorColor();
+    [self addSubview:_lineView];
+  }
+  return self;
+}
+
+- (void)layoutSubviews {
+  CGFloat lineHeight = 1;
+  CGFloat lineY = self.bounds.size.height - lineHeight - 8;
+  _lineView.frame = CGRectMake(0, lineY, self.bounds.size.width, lineHeight);
+}
+
+@end