[iOS] Upstream files in //ios/chrome/browser/autofill

ios/chrome/browser/autofill/form_suggestion_label.mm

+// Copyright 2013 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/autofill/form_suggestion_label.h"
+
+#include <cmath>
+
+#import <QuartzCore/QuartzCore.h>
+
+#include "base/strings/sys_string_conversions.h"
+#include "components/autofill/core/browser/credit_card.h"
+#import "components/autofill/ios/browser/form_suggestion.h"
+#import "ios/chrome/browser/autofill/form_suggestion_view_client.h"
+#include "ios/chrome/browser/ui/ui_util.h"
+
+namespace {
+
+// The button corner radius.
+const CGFloat kCornerRadius = 3.0f;
+
+// The width of the border in the button background image.
+const CGFloat kBorderWidth = 1.0f;
+
+// Font size of button titles.
+const CGFloat kIpadFontSize = 15.0f;
+const CGFloat kIphoneFontSize = 13.0f;
+
+// The grayscale value of the color object.
+const CGFloat kTitleColor = 51.0f / 255.0f;
+
+// The alpha value of the suggestion's description label.
+const CGFloat kDescriptionLabelAlpha = 0.54f;
+
+// The edge inset for background image.
+const CGFloat kBackgroundImageEdgeInsetSize = 8.0f;
+// The space between items in the label.
+const CGFloat kSpacing = 8.0f;
+
+// Structure that record the image for each icon.
+struct IconImageMap {
+  const char* const icon_name;
+  NSString* image_name;
+};
+
+const IconImageMap kCreditCardIconImageMap[] = {
+    {autofill::kAmericanExpressCard, @"autofill_card_american_express"},
+    {autofill::kDiscoverCard, @"autofill_card_discover"},
+    {autofill::kMasterCard, @"autofill_card_mastercard"},
+    {autofill::kVisaCard, @"autofill_card_visa"},
+    {autofill::kDinersCard, @"autofill_card_diners"},
+    {autofill::kGenericCard, @"autofill_card_generic"},
+    {autofill::kJCBCard, @"autofill_card_jcb"},
+    {autofill::kUnionPay, @"autofill_card_unionpay"},
+};
+
+// Creates a label with the given |text| and |alpha| suitable for use in a
+// suggestion button in the keyboard accessory view.
+UILabel* TextLabel(NSString* text, CGFloat alpha) {
+  base::scoped_nsobject<UILabel> label([[UILabel alloc] init]);
+  [label setText:text];
+  UIFont* font = IsIPadIdiom() ? [UIFont systemFontOfSize:kIpadFontSize]
+                               : [UIFont systemFontOfSize:kIphoneFontSize];
+  [label setFont:font];
+  [label setTextColor:[UIColor colorWithWhite:kTitleColor alpha:alpha]];
+  [label setBackgroundColor:[UIColor clearColor]];
+  [label sizeToFit];
+  return label.autorelease();
+}
+
+}  // namespace
+
+@interface FormSuggestionLabel ()
+
+@property(nonatomic, readonly) UIColor* normalBackgroundColor;
+@property(nonatomic, readonly) UIColor* pressedBackgroundColor;
+
+// Returns the color generated from the image named |imageName| resized to
+// |rect|.
+- (UIColor*)backgroundColorFromImageNamed:(NSString*)imageName
+                                   inRect:(CGRect)rect;
+// Returns the name of the image for credit card icon.
++ (NSString*)imageNameForCreditCardIcon:(NSString*)icon;
+@end
+
+@implementation FormSuggestionLabel {
+  // Client of this view.
+  base::WeakNSProtocol<id<FormSuggestionViewClient>> client_;
+  base::scoped_nsobject<FormSuggestion> suggestion_;
+
+  // Background color when the label is not pressed.
+  base::scoped_nsobject<UIColor> normalBackgroundColor_;
+  // Background color when the label is pressed.
+  base::scoped_nsobject<UIColor> pressedBackgroundColor_;
+}
+
+- (id)initWithSuggestion:(FormSuggestion*)suggestion
+           proposedFrame:(CGRect)proposedFrame
+                  client:(id<FormSuggestionViewClient>)client {
+  // TODO(jimblackler): implement sizeThatFits: and layoutSubviews, and perform
+  // layout in those methods instead of in the designated initializer.
+  self = [super initWithFrame:CGRectZero];
+  if (self) {
+    suggestion_.reset([suggestion retain]);
+    client_.reset(client);
+
+    const CGFloat frameHeight = CGRectGetHeight(proposedFrame);
+    CGFloat currentX = kBorderWidth + kSpacing;
+
+    UIImage* iconImage = [UIImage imageNamed:
+        [FormSuggestionLabel imageNameForCreditCardIcon:suggestion.icon]];
+    if (iconImage) {
+      UIImageView* iconView =
+          [[[UIImageView alloc] initWithImage:iconImage] autorelease];
+      const CGFloat iconY =
+          std::floor((frameHeight - iconImage.size.height) / 2.0f);
+      iconView.frame = CGRectMake(currentX, iconY, iconImage.size.width,
+                                  iconImage.size.height);
+      [self addSubview:iconView];
+      currentX += CGRectGetWidth(iconView.frame) + kSpacing;
+    }
+
+    UILabel* label = TextLabel(suggestion.value, 1.0f);
+    const CGFloat labelY =
+        std::floor(frameHeight / 2.0f - CGRectGetMidY(label.frame));
+    label.frame = CGRectMake(currentX, labelY, CGRectGetWidth(label.frame),
+                             CGRectGetHeight(label.frame));
+    [self addSubview:label];
+    currentX += CGRectGetWidth(label.frame) + kSpacing;
+
+    if (suggestion.displayDescription) {
+      UILabel* description =
+          TextLabel(suggestion.displayDescription, kDescriptionLabelAlpha);
+      const CGFloat descriptionY =
+          std::floor(frameHeight / 2.0f - CGRectGetMidY(description.frame));
+      description.frame =
+          CGRectMake(currentX, descriptionY, CGRectGetWidth(description.frame),
+                     CGRectGetHeight(description.frame));
+      [self addSubview:description];
+      currentX += CGRectGetWidth(description.frame) + kSpacing;
+    }
+
+    currentX += kBorderWidth;
+
+    self.frame = CGRectMake(proposedFrame.origin.x, proposedFrame.origin.y,
+                            currentX, proposedFrame.size.height);
+    [self setBackgroundColor:[self normalBackgroundColor]];
+    [[self layer] setCornerRadius:kCornerRadius];
+
+    [self setClipsToBounds:YES];
+    [self setIsAccessibilityElement:YES];
+    [self setAccessibilityLabel:suggestion.value];
+    [self setUserInteractionEnabled:YES];
+  }
+
+  return self;
+}
+
+- (id)initWithFrame:(CGRect)frame {
+  NOTREACHED();
+  return nil;
+}
+
+- (void)layoutSubviews {
+  // Resets the colors so the size will be updated in their getters.
+  normalBackgroundColor_.reset();
+  pressedBackgroundColor_.reset();
+  [super layoutSubviews];
+}
+
+#pragma mark -
+#pragma mark UIResponder
+
+- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {
+  [self setBackgroundColor:self.pressedBackgroundColor];
+}
+
+- (void)touchesCancelled:(NSSet*)touches withEvent:(UIEvent*)event {
+  [self setBackgroundColor:self.normalBackgroundColor];
+}
+
+- (void)touchesEnded:(NSSet*)touches withEvent:(UIEvent*)event {
+  [self setBackgroundColor:self.normalBackgroundColor];
+  [client_ didSelectSuggestion:suggestion_];
+}
+
+#pragma mark -
+#pragma mark Private
+
+- (UIColor*)normalBackgroundColor {
+  if (!normalBackgroundColor_) {
+    normalBackgroundColor_.reset(
+        [[self backgroundColorFromImageNamed:@"autofill_button"
+                                      inRect:self.bounds] retain]);
+  }
+  return normalBackgroundColor_;
+}
+
+- (UIColor*)pressedBackgroundColor {
+  if (!pressedBackgroundColor_) {
+    pressedBackgroundColor_.reset(
+        [[self backgroundColorFromImageNamed:@"autofill_button_pressed"
+                                      inRect:self.bounds] retain]);
+  }
+  return pressedBackgroundColor_;
+}
+
+- (UIColor*)backgroundColorFromImageNamed:(NSString*)imageName
+                                   inRect:(CGRect)rect {
+  UIEdgeInsets edgeInsets = UIEdgeInsetsMake(
+      kBackgroundImageEdgeInsetSize, kBackgroundImageEdgeInsetSize,
+      kBackgroundImageEdgeInsetSize, kBackgroundImageEdgeInsetSize);
+  UIImage* image =
+      [[UIImage imageNamed:imageName] resizableImageWithCapInsets:edgeInsets];
+
+  UIGraphicsBeginImageContextWithOptions(rect.size, NO,
+                                         UIScreen.mainScreen.scale);
+  [image drawInRect:rect];
+  UIImage* resizedImage = UIGraphicsGetImageFromCurrentImageContext();
+  UIGraphicsEndImageContext();
+
+  return [UIColor colorWithPatternImage:resizedImage];
+}
+
++ (NSString*)imageNameForCreditCardIcon:(NSString*)icon {
+  if (!icon || [icon length] == 0) {
+    return nil;
+  }
+  std::string iconName(base::SysNSStringToUTF8(icon));
+  for (size_t i = 0; i < arraysize(kCreditCardIconImageMap); ++i) {
+    if (iconName.compare(kCreditCardIconImageMap[i].icon_name) == 0) {
+      return kCreditCardIconImageMap[i].image_name;
+    }
+  }
+  return nil;
+}
+
+@end