WIP: Modes

Signed-off-by: Yannik Bloscheck <git@yannikbloscheck.com>

iphone/Maps/Classes/CustomViews/MapViewControls/ModeButton/MWMModeButtonViewController.h

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+#import "MWMViewController.h"
+
+@interface MWMModeButtonViewController : MWMViewController
+
++ (MWMModeButtonViewController *)controller;
+
+@property(nonatomic) BOOL hidden;
+
++ (void)updateAvailableArea:(CGRect)frame;
+
+@end

iphone/Maps/Classes/CustomViews/MapViewControls/ModeButton/MWMModeButtonViewController.mm

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+#import "MWMModeButtonViewController.h"
+
+#import <CoreApi/MWMMapOverlayManager.h>
+
+#import "MWMAlertViewController.h"
+#import "MWMButton.h"
+#import "MWMMapViewControlsCommon.h"
+#import "MWMMapViewControlsManager.h"
+#import "MapViewController.h"
+#import "SwiftBridge.h"
+#import "base/assert.hpp"
+
+namespace {
+CGFloat const kTopOffset = 6;
+}  // namespace
+
+@interface MWMMapViewControlsManager ()
+
+@property(nonatomic) MWMModeButtonViewController *modeButton;
+
+@end
+
+@interface MWMModeButtonViewController () <MWMMapOverlayManagerObserver, ThemeListener>
+
+@property(nonatomic) NSLayoutConstraint *topOffset;
+@property(nonatomic) NSLayoutConstraint *leftOffset;
+@property(nonatomic) CGRect availableArea;
+
+@end
+
+@implementation MWMModeButtonViewController
+
++ (MWMModeButtonViewController *)controller {
+  return [MWMMapViewControlsManager manager].modeButton;
+}
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    MapViewController *ovc = [MapViewController sharedController];
+    [ovc addChildViewController:self];
+    [ovc.controlsView addSubview:self.view];
+    [self configLayout];
+    [self applyTheme];
+    [StyleManager.shared addListener:self];
+    [MWMMapOverlayManager addObserver:self];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [StyleManager.shared removeListener:self];
+}
+
+- (void)viewWillDisappear:(BOOL)animated {
+  [super viewWillDisappear:animated];
+  [Toast hideAll];
+}
+
+- (void)configLayout {
+  UIView *sv = self.view;
+  UIView *ov = sv.superview;
+
+  self.topOffset = [sv.topAnchor constraintEqualToAnchor:ov.topAnchor constant:kTopOffset];
+  self.topOffset.active = YES;
+  self.leftOffset = [sv.leadingAnchor constraintEqualToAnchor:ov.leadingAnchor constant:kViewControlsOffsetToBounds];
+  self.leftOffset.active = YES;
+}
+
+- (void)setHidden:(BOOL)hidden {
+  _hidden = hidden;
+  [self refreshLayout];
+}
+
+- (void)refreshLayout {
+  dispatch_async(dispatch_get_main_queue(), ^{
+    auto const availableArea = self.availableArea;
+    auto const fitInAvailableArea = CGRectGetMaxY(self.view.frame) < CGRectGetMaxY(availableArea) + kTopOffset;
+    auto const shouldHide = self.hidden || !fitInAvailableArea;
+    auto const leftOffset = shouldHide ? -self.view.width : availableArea.origin.x + kViewControlsOffsetToBounds;
+    self.topOffset.constant = availableArea.origin.y + kTopOffset;
+    self.leftOffset.constant = leftOffset;
+    self.view.alpha = shouldHide ? 0 : 1;
+  });
+}
+
+- (void)applyTheme {
+  UIButton *btn = static_cast<UIButton *>(self.view);
+  NSString * postfix = [UIColor isNightMode] ? @"dark" : @"light";
+  [btn setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"%@_%@", @"btn_bg", postfix]] forState:UIControlStateNormal];
+  [btn setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"%@_highlighted_%@", @"btn_bg", postfix]] forState:UIControlStateHighlighted];
+  [btn setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"%@_%@", @"btn_bg", postfix]] forState:UIControlStateSelected];
+  
+  NSString *imageName = @"map";
+  switch ([MWMMapOverlayManager mapMode]) {
+      case MWMMapModeHiking:
+        imageName = @"hiking";
+        break;
+      case MWMMapModeCycling:
+        imageName = @"cycling";
+        break;
+      case MWMMapModeDriving:
+        imageName = @"driving";
+        break;
+      case MWMMapModePublicTransport:
+        imageName = @"publictransport";
+        break;
+      default:
+        break;
+  }
+  [btn setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
+  btn.tintColor = [UIColor iconOpaqueGrayTint];
+}
+
+- (IBAction)buttonTouchUpInside {
+  MWMMapViewControlsManager.manager.menuState = MWMBottomMenuStateLayers;
+}
+
++ (void)updateAvailableArea:(CGRect)frame {
+  auto controller = [self controller];
+  if (CGRectEqualToRect(controller.availableArea, frame))
+    return;
+  controller.availableArea = frame;
+  [controller refreshLayout];
+}
+
+#pragma mark - MWMMapOverlayManagerObserver
+
+- (void)onMapModeUpdated {
+  [self applyTheme];
+}
+
+@end

iphone/Maps/Classes/CustomViews/MapViewControls/ModeButton/MWMModeButtonViewController.xib

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+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="24506" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">
+    <device id="retina4_7" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="24504"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="MWMModeButtonViewController">
+            <connections>
+                <outlet property="view" destination="WVx-0E-RoH" id="0Ev-19-Sxq"/>
+            </connections>
+        </placeholder>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+        <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="WVx-0E-RoH" propertyAccessControl="all">
+            <rect key="frame" x="0.0" y="0.0" width="56" height="56"/>
+            <viewLayoutGuide key="safeArea" id="iUc-A7-STp"/>
+            <accessibility key="accessibilityConfiguration" identifier="layers_button"/>
+            <constraints>
+                <constraint firstAttribute="height" constant="56" id="24f-V4-Vuf"/>
+                <constraint firstAttribute="width" constant="56" id="hko-xz-hRz"/>
+            </constraints>
+            <connections>
+                <action selector="buttonTouchUpInside" destination="-1" eventType="touchUpInside" id="fKZ-g8-4ML"/>
+            </connections>
+            <point key="canvasLocation" x="0.0" y="0.0"/>
+        </button>
+    </objects>
+</document>