Upstream Chrome on iOS source code [6/11].

ios/chrome/browser/ui/popup_menu/popup_menu_controller.mm

+// Copyright 2012 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/popup_menu/popup_menu_controller.h"
+
+#import "base/ios/weak_nsobject.h"
+#include "base/logging.h"
+#include "base/mac/bundle_locations.h"
+#include "base/mac/objc_property_releaser.h"
+#import "ios/chrome/browser/ui/animation_util.h"
+#import "ios/chrome/browser/ui/popup_menu/popup_menu_view.h"
+#include "ios/chrome/browser/ui/rtl_geometry.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
+#import "ios/chrome/common/material_timing.h"
+#include "ios/chrome/grit/ios_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+using ios::material::TimingFunction;
+
+namespace {
+// Inset for the shadows of the contained views.
+static const CGFloat kPopupMenuVerticalInset = 11.0;
+// Duration for the Popup Menu Fade In animation
+static const CGFloat kFadeInAnimationDuration = 0.2;
+// Value to pass in for backgroundButtonTag to not set a tag value for
+// |backgroundButton_|.
+static const NSInteger kBackgroundButtonNoTag = -1;
+// Default width of the popup container.
+static const CGFloat kPopupContainerWidth = 236.0;
+// Default height of the popup container.
+static const CGFloat kPopupContainerHeight = 280.0;
+static const CGFloat kPopoverScaleFactor = 0.03;
+
+static void SetAnchorPoint(CGPoint anchorPoint, UIView* view) {
+  CGPoint oldOrigin = view.frame.origin;
+  view.layer.anchorPoint = anchorPoint;
+  CGPoint newOrigin = view.frame.origin;
+
+  CGPoint transition;
+  transition.x = newOrigin.x - oldOrigin.x;
+  transition.y = newOrigin.y - oldOrigin.y;
+
+  view.center =
+      CGPointMake(view.center.x - transition.x, view.center.y - transition.y);
+}
+
+static CGPoint AnimateInIntermediaryPoint(CGPoint source, CGPoint destination) {
+  CGPoint midPoint = CGPointZero;
+  midPoint.x = destination.x;
+  midPoint.y = source.y - 0.8 * fabs(destination.y - source.y);
+  return midPoint;
+}
+
+}  // anonymous namespace
+
+@interface PopupMenuController ()<PopupMenuViewDelegate> {
+  base::mac::ObjCPropertyReleaser propertyReleaser_PopupMenuController_;
+  CGPoint sourceAnimationPoint_;
+}
+@end
+
+@implementation PopupMenuController
+
+@synthesize containerView = containerView_;
+@synthesize backgroundButton = backgroundButton_;
+@synthesize popupContainer = popupContainer_;
+@synthesize delegate = delegate_;
+
+- (id)initWithParentView:(UIView*)parent {
+  return [self initWithParentView:parent
+           backgroundButtonParent:nil
+            backgroundButtonColor:nil
+            backgroundButtonAlpha:1.0
+              backgroundButtonTag:kBackgroundButtonNoTag
+         backgroundButtonSelector:nil];
+}
+
+- (id)initWithParentView:(UIView*)parent
+      backgroundButtonParent:(UIView*)backgroundButtonParent
+       backgroundButtonColor:(UIColor*)backgroundButtonColor
+       backgroundButtonAlpha:(CGFloat)backgroundButtonAlpha
+         backgroundButtonTag:(NSInteger)backgroundButtonTag
+    backgroundButtonSelector:(SEL)backgroundButtonSelector {
+  DCHECK(parent);
+  self = [super init];
+  if (self) {
+    propertyReleaser_PopupMenuController_.Init(self,
+                                               [PopupMenuController class]);
+
+    popupContainer_ = [[PopupMenuView alloc]
+        initWithFrame:CGRectMake(0, 0, kPopupContainerWidth,
+                                 kPopupContainerHeight)];
+
+    containerView_ = [[UIView alloc] initWithFrame:[parent bounds]];
+    containerView_.backgroundColor = [UIColor clearColor];
+    [containerView_ setAccessibilityViewIsModal:YES];
+    [popupContainer_ setDelegate:self];
+    // All views are added to the |containerView_| that in turn is added to the
+    // parent view. The Container View is needed to have a simple alpha
+    // transition when the menu is displayed or hidden.
+    [containerView_ addSubview:popupContainer_];
+    [parent addSubview:containerView_];
+
+    // Initialize backgroundButton_.
+    UIView* buttonParent =
+        backgroundButtonParent == nil ? containerView_ : backgroundButtonParent;
+    backgroundButton_ = [[UIButton alloc] initWithFrame:[buttonParent bounds]];
+    [buttonParent addSubview:backgroundButton_];
+    if (buttonParent == containerView_)
+      [buttonParent sendSubviewToBack:backgroundButton_];
+
+    backgroundButton_.autoresizingMask =
+        UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth |
+        UIViewAutoresizingFlexibleBottomMargin |
+        UIViewAutoresizingFlexibleLeadingMargin();
+    backgroundButton_.alpha = backgroundButtonAlpha;
+    if (backgroundButtonTag != kBackgroundButtonNoTag)
+      backgroundButton_.tag = backgroundButtonTag;
+    if (backgroundButtonColor != nil) {
+      backgroundButton_.backgroundColor = backgroundButtonColor;
+    }
+    if (backgroundButtonSelector != nil) {
+      [backgroundButton_ addTarget:nil
+                            action:backgroundButtonSelector
+                  forControlEvents:UIControlEventTouchDown];
+    } else {
+      [backgroundButton_ addTarget:self
+                            action:@selector(tappedBehindPopup:)
+                  forControlEvents:UIControlEventTouchDown];
+    }
+    [backgroundButton_ setAccessibilityLabel:l10n_util::GetNSString(
+                                                 IDS_IOS_TOOLBAR_CLOSE_MENU)];
+  }
+  return self;
+}
+
+- (void)setOptimalSize:(CGSize)optimalSize atOrigin:(CGPoint)origin {
+  CGRect popupFrame = [popupContainer_ bounds];
+  popupFrame.size.width = optimalSize.width;
+  popupFrame.size.height = 2 * kPopupMenuVerticalInset + optimalSize.height;
+
+  // If the origin is on the right half of the screen, treat origin as the top-
+  // right coordinate instead of top-left.
+  CGFloat xOffset = origin.x > [containerView_ bounds].size.width / 2
+                        ? origin.x - popupFrame.size.width
+                        : origin.x;
+  [popupContainer_ setFrame:CGRectOffset(popupFrame, xOffset, origin.y)];
+}
+
+- (void)fadeInPopupFromSource:(CGPoint)source
+                toDestination:(CGPoint)destination {
+  [self animateInFromPoint:source toPoint:destination];
+  UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification,
+                                  containerView_);
+}
+
+- (void)dismissAnimatedWithCompletion:(void (^)(void))completion {
+  [self animateOutToPoint:sourceAnimationPoint_ completion:completion];
+  UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification,
+                                  nil);
+}
+
+// Animate the view on screen (Fade in).
+- (void)fadeInPopup:(void (^)(BOOL finished))completionBlock {
+  [UIView animateWithDuration:kFadeInAnimationDuration
+                        delay:0.0
+                      options:UIViewAnimationOptionAllowUserInteraction
+                   animations:^{
+                     [containerView_ setAlpha:1.0];
+                   }
+                   completion:completionBlock];
+}
+
+- (void)dealloc {
+  [popupContainer_ removeFromSuperview];
+  [backgroundButton_ removeFromSuperview];
+  [containerView_ removeFromSuperview];
+  [super dealloc];
+}
+
+- (void)tappedBehindPopup:(id)sender {
+  [self dismissPopupMenu];
+}
+
+- (void)animateInFromPoint:(CGPoint)source toPoint:(CGPoint)destination {
+  sourceAnimationPoint_ = source;
+
+  // Set anchor to top right for top right destinations.
+  NSUInteger anchorX =
+      destination.x > [containerView_ bounds].size.width / 2 ? 1 : 0;
+  SetAnchorPoint(CGPointMake(anchorX, 0), popupContainer_);
+
+  CGPoint midPoint = AnimateInIntermediaryPoint(source, destination);
+
+  CATransform3D scaleTransform =
+      CATransform3DMakeScale(kPopoverScaleFactor, kPopoverScaleFactor, 1);
+
+  NSValue* destinationScaleValue =
+      [NSValue valueWithCATransform3D:CATransform3DIdentity];
+
+  CABasicAnimation* scaleAnimation =
+      [CABasicAnimation animationWithKeyPath:@"transform"];
+  CAMediaTimingFunction* easeOut = TimingFunction(ios::material::CurveEaseOut);
+  [scaleAnimation setFromValue:[NSValue valueWithCATransform3D:scaleTransform]];
+  [scaleAnimation setToValue:destinationScaleValue];
+  [scaleAnimation setTimingFunction:easeOut];
+  [scaleAnimation setDuration:ios::material::kDuration1];
+
+  CAKeyframeAnimation* positionAnimation =
+      [CAKeyframeAnimation animationWithKeyPath:@"position"];
+  [positionAnimation setValues:@[
+    [NSValue valueWithCGPoint:source], [NSValue valueWithCGPoint:source],
+    [NSValue valueWithCGPoint:midPoint], [NSValue valueWithCGPoint:destination]
+  ]];
+  [positionAnimation setTimingFunction:easeOut];
+  [positionAnimation setDuration:ios::material::kDuration1];
+  [positionAnimation setKeyTimes:@[ @0, @0.2, @0.5, @1 ]];
+
+  CAMediaTimingFunction* linear = TimingFunction(ios::material::CurveLinear);
+  CAAnimation* fadeAnimation = OpacityAnimationMake(0, 1);
+  [fadeAnimation setDuration:ios::material::kDuration2];
+  [fadeAnimation setTimingFunction:linear];
+  [fadeAnimation setBeginTime:ios::material::kDuration2];
+
+  CALayer* layer = [popupContainer_ layer];
+  [layer addAnimation:AnimationGroupMake(
+                          @[ scaleAnimation, positionAnimation, fadeAnimation ])
+               forKey:@"popup-in"];
+}
+
+- (void)animateOutToPoint:(CGPoint)destination
+               completion:(void (^)(void))completion {
+  CGPoint source = [[popupContainer_ layer] position];
+
+  CGPoint midPoint = CGPointZero;
+  midPoint.x = destination.x;
+  midPoint.y = source.y - 0.8 * fabs(destination.x - source.x);
+
+  CATransform3D scaleTransform =
+      CATransform3DMakeScale(kPopoverScaleFactor, kPopoverScaleFactor, 1);
+
+  CAMediaTimingFunction* easeIn = TimingFunction(ios::material::CurveEaseIn);
+  [CATransaction begin];
+  [CATransaction setAnimationTimingFunction:easeIn];
+  [CATransaction setAnimationDuration:ios::material::kDuration2];
+
+  base::WeakNSObject<PopupMenuController> weakSelf(self);
+  [CATransaction setCompletionBlock:^{
+    if (completion)
+      completion();
+  }];
+
+  NSValue* sourceScaleValue =
+      [NSValue valueWithCATransform3D:CATransform3DIdentity];
+
+  CABasicAnimation* scaleAnimation =
+      [CABasicAnimation animationWithKeyPath:@"transform"];
+  [scaleAnimation setFromValue:sourceScaleValue];
+  [scaleAnimation setToValue:[NSValue valueWithCATransform3D:scaleTransform]];
+
+  CABasicAnimation* positionAnimation =
+      [CABasicAnimation animationWithKeyPath:@"position"];
+  [positionAnimation setFromValue:[NSValue valueWithCGPoint:source]];
+  [positionAnimation setToValue:[NSValue valueWithCGPoint:destination]];
+
+  CABasicAnimation* fadeAnimation =
+      [CABasicAnimation animationWithKeyPath:@"opacity"];
+  [fadeAnimation setFromValue:@1];
+  [fadeAnimation setToValue:@0];
+
+  CALayer* layer = [popupContainer_ layer];
+  [layer addAnimation:AnimationGroupMake(
+                          @[ scaleAnimation, positionAnimation, fadeAnimation ])
+               forKey:@"out"];
+
+  [CATransaction commit];
+}
+
+#pragma mark -
+#pragma mark PopupMenuViewDelegate
+
+- (void)dismissPopupMenu {
+  [delegate_ dismissPopupMenu:self];
+}
+
+@end