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

ios/chrome/browser/autofill/form_suggestion_view.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_view.h"
+
+#include "base/i18n/rtl.h"
+#include "base/mac/scoped_nsobject.h"
+#import "ios/chrome/browser/autofill/form_suggestion_label.h"
+#import "ios/chrome/browser/autofill/form_suggestion_view_client.h"
+
+namespace {
+
+// Vertical margin between suggestions and the edge of the suggestion content
+// frame.
+const CGFloat kSuggestionVerticalMargin = 4;
+
+// Horizontal margin around suggestions (i.e. between suggestions, and between
+// the end suggestions and the suggestion content frame).
+const CGFloat kSuggestionHorizontalMargin = 2;
+
+}  // namespace
+
+@implementation FormSuggestionView {
+  // The FormSuggestions that are displayed by this view.
+  base::scoped_nsobject<NSArray> _suggestions;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame
+                       client:(id<FormSuggestionViewClient>)client
+                  suggestions:(NSArray*)suggestions {
+  self = [super initWithFrame:frame];
+  if (self) {
+    _suggestions.reset([suggestions copy]);
+
+    self.showsVerticalScrollIndicator = NO;
+    self.showsHorizontalScrollIndicator = NO;
+    self.bounces = NO;
+    self.canCancelContentTouches = YES;
+
+    // Total height occupied by the label content, padding, border and margin.
+    const CGFloat labelHeight =
+        CGRectGetHeight(frame) - kSuggestionVerticalMargin * 2;
+
+    BOOL isRTL = base::i18n::IsRTL();
+
+    NSUInteger suggestionCount = [_suggestions count];
+    // References to labels. These references are used to adjust the labels'
+    // positions if they don't take up the whole suggestion view area for RTL.
+    base::scoped_nsobject<NSMutableArray> labels(
+        [[NSMutableArray alloc] initWithCapacity:suggestionCount]);
+    __block CGFloat currentX = kSuggestionHorizontalMargin;
+    void (^setupBlock)(FormSuggestion* suggestion, NSUInteger idx, BOOL* stop) =
+        ^(FormSuggestion* suggestion, NSUInteger idx, BOOL* stop) {
+          // FormSuggestionLabel will adjust the width, so here 0 is used for
+          // the width.
+          CGRect proposedFrame =
+              CGRectMake(currentX, kSuggestionVerticalMargin, 0, labelHeight);
+          base::scoped_nsobject<UIView> label(
+              [[FormSuggestionLabel alloc] initWithSuggestion:suggestion
+                                                proposedFrame:proposedFrame
+                                                       client:client]);
+          [self addSubview:label];
+          [labels addObject:label];
+          currentX +=
+              CGRectGetWidth([label frame]) + kSuggestionHorizontalMargin;
+        };
+    [_suggestions enumerateObjectsWithOptions:(isRTL ? NSEnumerationReverse : 0)
+                                   usingBlock:setupBlock];
+
+    if (isRTL) {
+      if (currentX < CGRectGetWidth(frame)) {
+        self.contentSize = frame.size;
+        // Offsets labels for right alignment.
+        CGFloat offset = CGRectGetWidth(frame) - currentX;
+        for (UIView* label in labels.get()) {
+          label.frame = CGRectOffset(label.frame, offset, 0);
+        }
+      } else {
+        self.contentSize = CGSizeMake(currentX, CGRectGetHeight(frame));
+        // Sets the visible rectangle so suggestions at the right end are
+        // initially visible.
+        CGRect initRect = {{currentX - CGRectGetWidth(frame), 0}, frame.size};
+        [self scrollRectToVisible:initRect animated:NO];
+      }
+    } else {
+      self.contentSize = CGSizeMake(currentX, CGRectGetHeight(frame));
+    }
+  }
+  return self;
+}
+
+- (NSArray*)suggestions {
+  return _suggestions.get();
+}
+
+@end