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

ios/chrome/browser/autofill/form_input_accessory_view.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/autofill/form_input_accessory_view.h"
+
+#import <QuartzCore/QuartzCore.h>
+
+#include "base/i18n/rtl.h"
+#include "base/ios/weak_nsobject.h"
+#include "base/mac/scoped_nsobject.h"
+#import "ios/chrome/browser/autofill/form_input_accessory_view_delegate.h"
+#import "ios/chrome/browser/ui/image_util.h"
+#include "ios/chrome/browser/ui/ui_util.h"
+
+namespace {
+
+// The alpha value of the background color.
+const CGFloat kBackgroundColorAlpha = 1.0;
+
+// Horizontal margin around the custom view.
+const CGFloat kCustomViewHorizontalMargin = 2;
+
+// The width of the previous and next buttons.
+const CGFloat kNavigationButtonWidth = 44;
+
+// The width of the separators of the previous and next buttons.
+const CGFloat kNavigationButtonSeparatorWidth = 1;
+
+// The width of the shadow part of the navigation area separator.
+const CGFloat kNavigationAreaSeparatorShadowWidth = 2;
+
+// The width of the navigation area / custom view separator asset.
+const CGFloat kNavigationAreaSeparatorWidth = 1;
+
+// Returns YES if the keyboard close button should be shown on the accessory.
+BOOL ShouldShowCloseButton() {
+  return !IsIPadIdiom();
+}
+
+// Returns the width of navigation view.
+CGFloat GetNavigationViewWidth() {
+  // The number of naviation buttons (includes close button if shown).
+  NSUInteger numberNavigationButtons = 2;
+  if (ShouldShowCloseButton())
+    numberNavigationButtons++;
+  return numberNavigationButtons * kNavigationButtonWidth +
+         (numberNavigationButtons - 1) * kNavigationButtonSeparatorWidth +
+         kNavigationAreaSeparatorWidth;
+}
+
+}  // namespace
+
+@interface FormInputAccessoryView ()
+
+// Initializes the view with the given |customView|.
+// If the size of |rightFrame| is non-zero, the view will be split into two
+// parts with |leftFrame| and |rightFrame|. Otherwise the Autofill view will
+// be shown in |leftFrame|.
+- (void)initializeViewWithCustomView:(UIView*)customView
+                           leftFrame:(CGRect)leftFrame
+                          rightFrame:(CGRect)rightFrame;
+
+// Returns a view that shows navigation buttons in the |frame|.
+- (UIView*)viewForNavigationButtonsInFrame:(CGRect)frame;
+
+// Returns a navigation button for Autofill that has |normalImage| for state
+// UIControlStateNormal, a |pressedImage| for states UIControlStateSelected and
+// UIControlStateHighlighted, and an optional |disabledImage| for
+// UIControlStateDisabled.
+- (UIButton*)keyboardNavButtonWithNormalImage:(UIImage*)normalImage
+                                 pressedImage:(UIImage*)pressedImage
+                                disabledImage:(UIImage*)disabledImage
+                                       target:(id)target
+                                       action:(SEL)action
+                                      enabled:(BOOL)enabled
+                                      originX:(CGFloat)originX
+                                      originY:(CGFloat)originY
+                                       height:(CGFloat)height;
+
+// Adds a background image to |view|. The supplied image is stretched to fit the
+// space by stretching the content its horizontal and vertical centers.
++ (void)addBackgroundImageInView:(UIView*)view
+                   withImageName:(NSString*)imageName;
+
+// Adds an image view in |view| with an image named |imageName| at
+// (|originX|, 0). The width is |width| and the height is the height of |view|.
++ (void)addImageViewWithImageName:(NSString*)imageName
+                          originX:(CGFloat)originX
+                          originY:(CGFloat)originY
+                            width:(CGFloat)width
+                           inView:(UIView*)view;
+
+@end
+
+@implementation FormInputAccessoryView {
+  // The custom view that is displayed in the input accessory view.
+  base::scoped_nsobject<UIView> _customView;
+
+  // Delegate of this view.
+  base::WeakNSProtocol<id<FormInputAccessoryViewDelegate>> _delegate;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame
+                     delegate:(id<FormInputAccessoryViewDelegate>)delegate
+                   customView:(UIView*)customView
+                    leftFrame:(CGRect)leftFrame
+                   rightFrame:(CGRect)rightFrame {
+  DCHECK(delegate);
+  self = [super initWithFrame:frame];
+  if (self) {
+    _delegate.reset(delegate);
+    _customView.reset([customView retain]);
+    [self initializeViewWithCustomView:_customView
+                             leftFrame:leftFrame
+                            rightFrame:rightFrame];
+  }
+  return self;
+}
+
+#pragma mark -
+#pragma mark UIInputViewAudioFeedback
+
+- (BOOL)enableInputClicksWhenVisible {
+  return YES;
+}
+
+#pragma mark -
+#pragma mark Private Methods
+
+- (void)initializeViewWithCustomView:(UIView*)customView
+                           leftFrame:(CGRect)leftFrame
+                          rightFrame:(CGRect)rightFrame {
+  UIView* customViewContainer = [[[UIView alloc] init] autorelease];
+  [self addSubview:customViewContainer];
+  UIView* navView = [[[UIView alloc] init] autorelease];
+  [self addSubview:navView];
+
+  bool splitKeyboard = CGRectGetWidth(rightFrame) != 0;
+  BOOL isRTL = base::i18n::IsRTL();
+
+  // The computed frame for |customView|.
+  CGRect customViewFrame;
+  // Frame of a subview of |navView| in which navigation buttons will be shown.
+  CGRect navFrame = CGRectZero;
+  if (splitKeyboard) {
+    NSString* navViewBackgroundImageName = nil;
+    NSString* customViewContainerBackgroundImageName = nil;
+    NSUInteger navFrameOriginX = 0;
+    if (isRTL) {
+      navView.frame = leftFrame;
+      navViewBackgroundImageName = @"autofill_keyboard_background_left";
+      customViewContainer.frame = rightFrame;
+      customViewContainerBackgroundImageName =
+          @"autofill_keyboard_background_right";
+      // Navigation buttons will be shown on the left side.
+      navFrameOriginX = 0;
+    } else {
+      customViewContainer.frame = leftFrame;
+      customViewContainerBackgroundImageName =
+          @"autofill_keyboard_background_left";
+      navView.frame = rightFrame;
+      navViewBackgroundImageName = @"autofill_keyboard_background_right";
+      // Navigation buttons will be shown on the right side.
+      navFrameOriginX =
+          CGRectGetWidth(navView.frame) - GetNavigationViewWidth();
+    }
+
+    [[self class]
+        addBackgroundImageInView:customViewContainer
+                   withImageName:customViewContainerBackgroundImageName];
+    [[self class] addBackgroundImageInView:navView
+                             withImageName:navViewBackgroundImageName];
+
+    // For RTL, the custom view is the right view; the padding should be at the
+    // left side of this view. Otherwise, the custom view is the left view
+    // and the space is at the right side.
+    customViewFrame = CGRectMake(isRTL ? kCustomViewHorizontalMargin : 0, 0,
+                                 CGRectGetWidth(customViewContainer.bounds) -
+                                     kCustomViewHorizontalMargin,
+                                 CGRectGetHeight(customViewContainer.bounds));
+    navFrame = CGRectMake(navFrameOriginX, 0, GetNavigationViewWidth(),
+                          CGRectGetHeight(navView.frame));
+  } else {
+    NSUInteger navViewFrameOriginX = 0;
+    NSUInteger customViewContainerFrameOrginX = 0;
+    if (isRTL) {
+      navViewFrameOriginX = kNavigationAreaSeparatorShadowWidth;
+      customViewContainerFrameOrginX = GetNavigationViewWidth();
+    } else {
+      navViewFrameOriginX =
+          CGRectGetWidth(leftFrame) - GetNavigationViewWidth();
+    }
+
+    customViewContainer.frame =
+        CGRectMake(customViewContainerFrameOrginX, 0,
+                   CGRectGetWidth(leftFrame) - GetNavigationViewWidth() +
+                       kNavigationAreaSeparatorShadowWidth,
+                   CGRectGetHeight(leftFrame));
+    navView.frame = CGRectMake(navViewFrameOriginX, 0, GetNavigationViewWidth(),
+                               CGRectGetHeight(leftFrame));
+
+    customViewFrame = customViewContainer.bounds;
+    navFrame = navView.bounds;
+    [[self class] addBackgroundImageInView:self
+                             withImageName:@"autofill_keyboard_background"];
+  }
+
+  [customView setFrame:customViewFrame];
+  [customViewContainer addSubview:customView];
+  [navView addSubview:[self viewForNavigationButtonsInFrame:navFrame]];
+}
+
+UIImage* ButtonImage(NSString* name) {
+  UIImage* rawImage = [UIImage imageNamed:name];
+  return StretchableImageFromUIImage(rawImage, 1, 0);
+}
+
+- (UIView*)viewForNavigationButtonsInFrame:(CGRect)frame {
+  UIView* navView = [[[UIView alloc] initWithFrame:frame] autorelease];
+
+  BOOL isRTL = base::i18n::IsRTL();
+
+  // Vertical space is left for a dividing line.
+  CGFloat firstRow = 1;
+
+  CGFloat currentX = 0;
+
+  // Navigation view is at the right side if not RTL. Add a left separator in
+  // this case.
+  if (!isRTL) {
+    [[self class] addImageViewWithImageName:@"autofill_left_sep"
+                                    originX:currentX
+                                    originY:firstRow
+                                      width:kNavigationAreaSeparatorWidth
+                                     inView:navView];
+    currentX = kNavigationAreaSeparatorWidth;
+  }
+
+  UIButton* previousButton = [self
+      keyboardNavButtonWithNormalImage:ButtonImage(@"autofill_prev")
+                          pressedImage:ButtonImage(@"autofill_prev_pressed")
+                         disabledImage:ButtonImage(@"autofill_prev_inactive")
+                                target:_delegate
+                                action:@selector(selectPreviousElement)
+                               enabled:NO
+                               originX:currentX
+                               originY:firstRow
+                                height:CGRectGetHeight(frame)];
+  [navView addSubview:previousButton];
+  currentX += kNavigationButtonWidth;
+
+  // Add internal separator.
+  [[self class] addImageViewWithImageName:@"autofill_middle_sep"
+                                  originX:currentX
+                                  originY:firstRow
+                                    width:kNavigationButtonSeparatorWidth
+                                   inView:navView];
+  currentX += kNavigationButtonSeparatorWidth;
+
+  UIButton* nextButton = [self
+      keyboardNavButtonWithNormalImage:ButtonImage(@"autofill_next")
+                          pressedImage:ButtonImage(@"autofill_next_pressed")
+                         disabledImage:ButtonImage(@"autofill_next_inactive")
+                                target:_delegate
+                                action:@selector(selectNextElement)
+                               enabled:NO
+                               originX:currentX
+                               originY:firstRow
+                                height:CGRectGetHeight(frame)];
+  [navView addSubview:nextButton];
+  currentX += kNavigationButtonWidth;
+
+  [_delegate fetchPreviousAndNextElementsPresenceWithCompletionHandler:
+                 ^(BOOL hasPreviousElement, BOOL hasNextElement) {
+                   previousButton.enabled = hasPreviousElement;
+                   nextButton.enabled = hasNextElement;
+                 }];
+
+  if (ShouldShowCloseButton()) {
+    // Add internal separator.
+    [[self class] addImageViewWithImageName:@"autofill_middle_sep"
+                                    originX:currentX
+                                    originY:firstRow
+                                      width:kNavigationButtonSeparatorWidth
+                                     inView:navView];
+    currentX += kNavigationButtonSeparatorWidth;
+
+    [navView addSubview:[self
+        keyboardNavButtonWithNormalImage:ButtonImage(@"autofill_close")
+                            pressedImage:ButtonImage(@"autofill_close_pressed")
+                           disabledImage:nil
+                                  target:_delegate
+                                  action:@selector(closeKeyboard)
+                                 enabled:YES
+                                 originX:currentX
+                                 originY:firstRow
+                                  height:CGRectGetHeight(frame)]];
+    currentX += kNavigationButtonWidth;
+  }
+
+  // Navigation view is at the left side for RTL. Add a right separator in
+  // this case.
+  if (isRTL) {
+    [[self class] addImageViewWithImageName:@"autofill_right_sep"
+                                    originX:currentX
+                                    originY:firstRow
+                                      width:kNavigationAreaSeparatorWidth
+                                     inView:navView];
+  }
+
+  return navView;
+}
+
+- (UIButton*)keyboardNavButtonWithNormalImage:(UIImage*)normalImage
+                                 pressedImage:(UIImage*)pressedImage
+                                disabledImage:(UIImage*)disabledImage
+                                       target:(id)target
+                                       action:(SEL)action
+                                      enabled:(BOOL)enabled
+                                      originX:(CGFloat)originX
+                                      originY:(CGFloat)originY
+                                       height:(CGFloat)height {
+  UIButton* button = [UIButton buttonWithType:UIButtonTypeCustom];
+
+  button.frame =
+      CGRectMake(originX, originY, kNavigationButtonWidth, height - originY);
+
+  [button setBackgroundImage:normalImage forState:UIControlStateNormal];
+  [button setBackgroundImage:pressedImage forState:UIControlStateSelected];
+  [button setBackgroundImage:pressedImage forState:UIControlStateHighlighted];
+  if (disabledImage)
+    [button setBackgroundImage:disabledImage forState:UIControlStateDisabled];
+
+  CALayer* layer = [button layer];
+  layer.borderWidth = 0;
+  layer.borderColor = [[UIColor blackColor] CGColor];
+  button.enabled = enabled;
+  [button addTarget:target
+                action:action
+      forControlEvents:UIControlEventTouchUpInside];
+  return button;
+}
+
++ (void)addBackgroundImageInView:(UIView*)view
+                   withImageName:(NSString*)imageName {
+  UIImage* backgroundImage = StretchableImageNamed(imageName);
+
+  UIImageView* backgroundImageView =
+      [[[UIImageView alloc] initWithFrame:view.bounds] autorelease];
+  [backgroundImageView setImage:backgroundImage];
+  [backgroundImageView setAlpha:kBackgroundColorAlpha];
+  [view addSubview:backgroundImageView];
+  [view sendSubviewToBack:backgroundImageView];
+}
+
++ (void)addImageViewWithImageName:(NSString*)imageName
+                          originX:(CGFloat)originX
+                          originY:(CGFloat)originY
+                            width:(CGFloat)width
+                           inView:(UIView*)view {
+  UIImage* image =
+      StretchableImageFromUIImage([UIImage imageNamed:imageName], 0, 0);
+  base::scoped_nsobject<UIImageView> imageView(
+      [[UIImageView alloc] initWithImage:image]);
+  [imageView setFrame:CGRectMake(originX, originY, width,
+                                 CGRectGetHeight(view.bounds) - originY)];
+  [view addSubview:imageView];
+}
+
+@end