Upstream Chrome on iOS source code [5/11].

ios/chrome/browser/ui/find_bar/find_bar_text_field.mm

+// Copyright 2016 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/find_bar/find_bar_text_field.h"
+
+#include "base/i18n/rtl.h"
+#import "ios/chrome/browser/find_in_page/find_in_page_controller.h"
+#include "ios/chrome/grit/ios_strings.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+
+namespace {
+// Find bar left padding
+const CGFloat kFindBarLeftPadding = 16;
+}  // anonymous namespace
+
+@implementation FindBarTextField
+
+@synthesize overlayWidth = _overlayWidth;
+
+#pragma mark - UIView
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  self = [super initWithFrame:frame];
+  if (self) {
+    self.textAlignment = NSTextAlignmentNatural;
+    self.accessibilityLabel =
+        l10n_util::GetNSStringWithFixup(IDS_IOS_PLACEHOLDER_FIND_IN_PAGE);
+  }
+  return self;
+}
+
+#pragma mark - Public methods
+
+- (void)setOverlayWidth:(CGFloat)overlayWidth {
+  _overlayWidth = overlayWidth;
+  [self setNeedsLayout];
+}
+
+#pragma mark - UITextField
+
+- (CGRect)textRectForBounds:(CGRect)bounds {
+  return [self editingRectForBounds:bounds];
+}
+
+- (CGRect)editingRectForBounds:(CGRect)bounds {
+  // Reduce the width by the width of the overlay + padding for both sides of
+  // the text.
+  bounds.size.width -= _overlayWidth + 2 * kFindBarLeftPadding;
+  bounds.origin.x += kFindBarLeftPadding;
+
+  // Shift the text to the right side of the overlay for RTL languages.
+  if (base::i18n::IsRTL())
+    bounds.origin.x += _overlayWidth;
+  return bounds;
+}
+
+@end