[google_maps_flutter] Implement polyline patterns in google maps ios

packages/google_maps_flutter/google_maps_flutter/example/lib/place_polyline.dart

@@ -291,10 +291,10 @@ class PlacePolylineBodyState extends State<PlacePolylineBody> {
                           child: const Text('change joint type [Android only]'),
                         ),
                         TextButton(
-                          onPressed: isIOS || (selectedId == null)
+                          onPressed: (selectedId == null)
                               ? null
                               : () => _changePattern(selectedId),
-                          child: const Text('change pattern [Android only]'),
+                          child: const Text('change pattern'),
                         ),
                       ],
                     )

packages/google_maps_flutter/google_maps_flutter_android/example/lib/place_polyline.dart

@@ -292,10 +292,10 @@ class PlacePolylineBodyState extends State<PlacePolylineBody> {
                           child: const Text('change joint type [Android only]'),
                         ),
                         TextButton(
-                          onPressed: isIOS || (selectedId == null)
+                          onPressed: (selectedId == null)
                               ? null
                               : () => _changePattern(selectedId),
-                          child: const Text('change pattern [Android only]'),
+                          child: const Text('change pattern'),
                         ),
                       ],
                     )

packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.6.1
+
+* Adds support for patterns in polylines.
+
 ## 2.6.0
 
 * Updates the minimum allowed verison of the Google Maps SDK to 8.4, for privacy

packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/ios/Runner.xcodeproj/project.pbxproj

@@ -11,15 +11,16 @@
 		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
 		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
 		4510D964F3B1259FEDD3ABA6 /* libPods-Runner.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 7755F8F4BABC3D6A0BD4048B /* libPods-Runner.a */; };
+		478116522BEF8F47002F593E /* GoogleMapsPolylinesControllerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 478116512BEF8F47002F593E /* GoogleMapsPolylinesControllerTests.m */; };
 		6851F3562835BC180032B7C8 /* FLTGoogleMapJSONConversionsConversionTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6851F3552835BC180032B7C8 /* FLTGoogleMapJSONConversionsConversionTests.m */; };
 		68E4726A2836FF0C00BDDDAC /* MapKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 68E472692836FF0C00BDDDAC /* MapKit.framework */; };
 		978B8F6F1D3862AE00F588F7 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 7AFFD8EE1D35381100E5BB4D /* AppDelegate.m */; };
 		97C146F31CF9000F007C117D /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 97C146F21CF9000F007C117D /* main.m */; };
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
-		F269303B2BB389BF00BF17C4 /* assets in Resources */ = {isa = PBXBuildFile; fileRef = F269303A2BB389BF00BF17C4 /* assets */; };
 		982F2A6C27BADE17003C81F4 /* PartiallyMockedMapView.m in Sources */ = {isa = PBXBuildFile; fileRef = 982F2A6B27BADE17003C81F4 /* PartiallyMockedMapView.m */; };
+		F269303B2BB389BF00BF17C4 /* assets in Resources */ = {isa = PBXBuildFile; fileRef = F269303A2BB389BF00BF17C4 /* assets */; };
 		F7151F13265D7ED70028CB91 /* GoogleMapsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = F7151F12265D7ED70028CB91 /* GoogleMapsTests.m */; };
 		F7151F21265D7EE50028CB91 /* GoogleMapsUITests.m in Sources */ = {isa = PBXBuildFile; fileRef = F7151F20265D7EE50028CB91 /* GoogleMapsUITests.m */; };
 		FC8F35FC8CD533B128950487 /* libPods-RunnerTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = F267F68029D1A4E2E4C572A7 /* libPods-RunnerTests.a */; };
@@ -60,6 +61,7 @@
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		478116512BEF8F47002F593E /* GoogleMapsPolylinesControllerTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GoogleMapsPolylinesControllerTests.m; sourceTree = "<group>"; };
 		6851F3552835BC180032B7C8 /* FLTGoogleMapJSONConversionsConversionTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = FLTGoogleMapJSONConversionsConversionTests.m; sourceTree = "<group>"; };
 		68E472692836FF0C00BDDDAC /* MapKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = MapKit.framework; path = Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/System/iOSSupport/System/Library/Frameworks/MapKit.framework; sourceTree = DEVELOPER_DIR; };
 		733AFAB37683A9DA7512F09C /* Pods-RunnerTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.release.xcconfig"; path = "Pods/Target Support Files/Pods-RunnerTests/Pods-RunnerTests.release.xcconfig"; sourceTree = "<group>"; };
@@ -203,6 +205,7 @@
 				F269303A2BB389BF00BF17C4 /* assets */,
 				6851F3552835BC180032B7C8 /* FLTGoogleMapJSONConversionsConversionTests.m */,
 				F7151F12265D7ED70028CB91 /* GoogleMapsTests.m */,
+				478116512BEF8F47002F593E /* GoogleMapsPolylinesControllerTests.m */,
 				982F2A6A27BADE17003C81F4 /* PartiallyMockedMapView.h */,
 				982F2A6B27BADE17003C81F4 /* PartiallyMockedMapView.m */,
 				F7151F14265D7ED70028CB91 /* Info.plist */,
@@ -467,6 +470,7 @@
 				F7151F13265D7ED70028CB91 /* GoogleMapsTests.m in Sources */,
 				6851F3562835BC180032B7C8 /* FLTGoogleMapJSONConversionsConversionTests.m in Sources */,
 				982F2A6C27BADE17003C81F4 /* PartiallyMockedMapView.m in Sources */,
+				478116522BEF8F47002F593E /* GoogleMapsPolylinesControllerTests.m in Sources */,
 				0DD7B6C32B744EEF00E857FD /* FLTTileProviderControllerTests.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/ios/RunnerTests/FLTGoogleMapJSONConversionsConversionTests.m

@@ -288,4 +288,18 @@ - (void)testCameraUpdateFromChannelValueZoomTo {
   [classMockCameraUpdate stopMocking];
 }
 
+- (void)testLengthsFromPatterns {
+  NSArray *patterns = @[ @[ @"gap", @10 ], @[ @"dash", @6.4 ] ];
+
+  NSArray<NSNumber *> *spanLengths = [FLTGoogleMapJSONConversions spanLengthsFromPatterns:patterns];
+
+  XCTAssertEqual([spanLengths count], 2);
+
+  NSNumber *firstSpanLength = spanLengths[0];
+  NSNumber *secondSpanLength = spanLengths[1];
+
+  XCTAssertEqual(firstSpanLength.doubleValue, 10);
+  XCTAssertEqual(secondSpanLength.doubleValue, 6.4);
+}
+
 @end

packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/ios/RunnerTests/GoogleMapsPolylinesControllerTests.m

@@ -0,0 +1,83 @@
+// Copyright 2013 The Flutter 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 google_maps_flutter_ios;
+@import google_maps_flutter_ios.Test;
+@import XCTest;
+@import GoogleMaps;
+
+#import <OCMock/OCMock.h>
+#import <google_maps_flutter_ios/GoogleMapPolylineController_Test.h>
+#import "PartiallyMockedMapView.h"
+
+@interface GoogleMapsPolylinesControllerTests : XCTestCase
+@end
+
+@implementation GoogleMapsPolylinesControllerTests
+
+///
+/// Returns GoogleMapPolylineController object instantiated with a mocked map instance
+///
+///  @return An object of FLTGoogleMapPolylineController
+///
+- (FLTGoogleMapPolylineController *)polylineControllerWithMockedMap {
+  NSDictionary *polyline = @{
+    @"points" : @[
+      @[ @(52.4816), @(-3.1791) ], @[ @(54.043), @(-2.9925) ], @[ @(54.1396), @(-4.2739) ],
+      @[ @(53.4153), @(-4.0829) ]
+    ],
+    @"polylineId" : @"polyline_id_0",
+  };
+
+  CGRect frame = CGRectMake(0, 0, 100, 100);
+  GMSCameraPosition *camera = [[GMSCameraPosition alloc] initWithLatitude:0 longitude:0 zoom:0];
+
+  GMSMapViewOptions *mapViewOptions = [[GMSMapViewOptions alloc] init];
+  mapViewOptions.frame = frame;
+  mapViewOptions.camera = camera;
+
+  PartiallyMockedMapView *mapView = [[PartiallyMockedMapView alloc] initWithOptions:mapViewOptions];
+
+  GMSMutablePath *path = [FLTPolylinesController pathForPolyline:polyline];
+  NSString *identifier = polyline[@"polylineId"];
+
+  FLTGoogleMapPolylineController *polylineControllerWithMockedMap =
+      [[FLTGoogleMapPolylineController alloc] initPolylineWithPath:path
+                                                        identifier:identifier
+                                                           mapView:mapView];
+
+  return polylineControllerWithMockedMap;
+}
+
+- (void)testSetPatterns {
+  NSArray<GMSStrokeStyle *> *styles = @[
+    [GMSStrokeStyle solidColor:[UIColor clearColor]], [GMSStrokeStyle solidColor:[UIColor redColor]]
+  ];
+
+  NSArray<NSNumber *> *lengths = @[ @10, @10 ];
+
+  FLTGoogleMapPolylineController *polylineController = [self polylineControllerWithMockedMap];
+
+  XCTAssertNil(polylineController.polyline.spans);
+
+  [polylineController setPattern:styles lengths:lengths];
+
+  // `GMSStyleSpan` doesn't implement `isEqual` so cannot be compared by value at present.
+  XCTAssertNotNil(polylineController.polyline.spans);
+}
+
+- (void)testStrokeStylesFromPatterns {
+  NSArray *patterns = @[ @[ @"gap", @10 ], @[ @"dash", @10 ] ];
+  UIColor *strokeColor = [UIColor redColor];
+
+  NSArray<GMSStrokeStyle *> *patternStrokeStyle =
+      [FLTGoogleMapJSONConversions strokeStylesFromPatterns:patterns strokeColor:strokeColor];
+
+  XCTAssertEqual([patternStrokeStyle count], 2);
+
+  // None of the parameters of `patternStrokeStyle` is observable, so we limit to testing
+  // the length of this output array.
+}
+
+@end

packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/lib/place_polyline.dart

@@ -292,10 +292,10 @@ class PlacePolylineBodyState extends State<PlacePolylineBody> {
                           child: const Text('change joint type [Android only]'),
                         ),
                         TextButton(
-                          onPressed: isIOS || (selectedId == null)
+                          onPressed: (selectedId == null)
                               ? null
                               : () => _changePattern(selectedId),
-                          child: const Text('change pattern [Android only]'),
+                          child: const Text('change pattern'),
                         ),
                       ],
                     )

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/FLTGoogleMapJSONConversions.h

@@ -25,6 +25,24 @@ NS_ASSUME_NONNULL_BEGIN
 + (GMSMapViewType)mapViewTypeFromTypeValue:(NSNumber *)value;
 + (nullable GMSCameraUpdate *)cameraUpdateFromChannelValue:(NSArray *)channelValue;
 
+///
+/// Return GMS strokestyle object array populated using the patterns and stroke colors passed in.
+///
+/// @param patterns An array of patterns for each stroke in the polyline.
+/// @param strokeColor An array of color for each stroke in the polyline.
+/// @return An array of GMSStrokeStyle.
+///
++ (NSArray<GMSStrokeStyle *> *)strokeStylesFromPatterns:(NSArray<NSArray<NSObject *> *> *)patterns
+                                            strokeColor:(UIColor *)strokeColor;
+///
+/// Return GMS strokestyle object array populated using the patterns and stroke colors passed in.
+/// Extracts the lengths of each stroke in the polyline from patterns input
+///
+/// @param patterns An array of object representing the pattern params in the polyline.
+/// @return Array of lengths.
+///
++ (NSArray<NSNumber *> *)spanLengthsFromPatterns:(NSArray<NSArray<NSObject *> *> *)patterns;
+
 @end
 
 NS_ASSUME_NONNULL_END

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/FLTGoogleMapJSONConversions.m

@@ -141,4 +141,26 @@ + (nullable GMSCameraUpdate *)cameraUpdateFromChannelValue:(NSArray *)channelVal
   }
   return nil;
 }
+
++ (NSArray<GMSStrokeStyle *> *)strokeStylesFromPatterns:(NSArray<NSArray<NSObject *> *> *)patterns
+                                            strokeColor:(UIColor *)strokeColor {
+  NSMutableArray *strokeStyles = [[NSMutableArray alloc] initWithCapacity:[patterns count]];
+  for (NSArray *pattern in patterns) {
+    NSString *patternType = pattern[0];
+    UIColor *color = [patternType isEqualToString:@"gap"] ? [UIColor clearColor] : strokeColor;
+    [strokeStyles addObject:[GMSStrokeStyle solidColor:color]];
+  }
+
+  return strokeStyles;
+}
+
++ (NSArray<NSNumber *> *)spanLengthsFromPatterns:(NSArray<NSArray<NSObject *> *> *)patterns {
+  NSMutableArray *lengths = [[NSMutableArray alloc] initWithCapacity:[patterns count]];
+  for (NSArray *pattern in patterns) {
+    NSNumber *length = [pattern count] > 1 ? pattern[1] : @0;
+    [lengths addObject:length];
+  }
+
+  return lengths;
+}
 @end

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapPolylineController.h

@@ -11,6 +11,14 @@
                           identifier:(NSString *)identifier
                              mapView:(GMSMapView *)mapView;
 - (void)removePolyline;
+
+///
+/// Sets the pattern on polyline controller
+///
+/// @param styles The styles for repeating pattern sections.
+/// @param lengths The lengths for repeating pattern sections.
+///
+- (void)setPattern:(NSArray<GMSStrokeStyle *> *)styles lengths:(NSArray<NSNumber *> *)lengths;
 @end
 
 @interface FLTPolylinesController : NSObject

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapPolylineController.m

@@ -12,6 +12,14 @@ @interface FLTGoogleMapPolylineController ()
 
 @end
 
+///
+/// Returns dict[key], or nil if dict[key] is NSNull.
+///
+static id GetValueOrNilFromDict(NSDictionary *dict, NSString *key) {
+  id value = dict[key];
+  return value == [NSNull null] ? nil : value;
+}
+
 @implementation FLTGoogleMapPolylineController
 
 - (instancetype)initPolylineWithPath:(GMSMutablePath *)path
@@ -59,42 +67,54 @@ - (void)setGeodesic:(BOOL)isGeodesic {
   self.polyline.geodesic = isGeodesic;
 }
 
+- (void)setPattern:(NSArray<GMSStrokeStyle *> *)styles lengths:(NSArray<NSNumber *> *)lengths {
+  self.polyline.spans = GMSStyleSpans(self.polyline.path, styles, lengths, kGMSLengthRhumb);
+}
+
 - (void)interpretPolylineOptions:(NSDictionary *)data
                        registrar:(NSObject<FlutterPluginRegistrar> *)registrar {
-  NSNumber *consumeTapEvents = data[@"consumeTapEvents"];
-  if (consumeTapEvents && consumeTapEvents != (id)[NSNull null]) {
+  NSNumber *consumeTapEvents = GetValueOrNilFromDict(data, @"consumeTapEvents");
+  if (consumeTapEvents) {
     [self setConsumeTapEvents:[consumeTapEvents boolValue]];
   }
 
-  NSNumber *visible = data[@"visible"];
-  if (visible && visible != (id)[NSNull null]) {
+  NSNumber *visible = GetValueOrNilFromDict(data, @"visible");
+  if (visible) {
     [self setVisible:[visible boolValue]];
   }
 
-  NSNumber *zIndex = data[@"zIndex"];
-  if (zIndex && zIndex != (id)[NSNull null]) {
+  NSNumber *zIndex = GetValueOrNilFromDict(data, @"zIndex");
+  if (zIndex) {
     [self setZIndex:[zIndex intValue]];
   }
 
-  NSArray *points = data[@"points"];
-  if (points && points != (id)[NSNull null]) {
+  NSArray *points = GetValueOrNilFromDict(data, @"points");
+  if (points) {
     [self setPoints:[FLTGoogleMapJSONConversions pointsFromLatLongs:points]];
   }
 
-  NSNumber *strokeColor = data[@"color"];
-  if (strokeColor && strokeColor != (id)[NSNull null]) {
+  NSNumber *strokeColor = GetValueOrNilFromDict(data, @"color");
+  if (strokeColor) {
     [self setColor:[FLTGoogleMapJSONConversions colorFromRGBA:strokeColor]];
   }
 
-  NSNumber *strokeWidth = data[@"width"];
-  if (strokeWidth && strokeWidth != (id)[NSNull null]) {
+  NSNumber *strokeWidth = GetValueOrNilFromDict(data, @"width");
+  if (strokeWidth) {
     [self setStrokeWidth:[strokeWidth intValue]];
   }
 
-  NSNumber *geodesic = data[@"geodesic"];
-  if (geodesic && geodesic != (id)[NSNull null]) {
+  NSNumber *geodesic = GetValueOrNilFromDict(data, @"geodesic");
+  if (geodesic) {
     [self setGeodesic:geodesic.boolValue];
   }
+
+  NSArray *patterns = GetValueOrNilFromDict(data, @"pattern");
+  if (patterns) {
+    [self
+        setPattern:[FLTGoogleMapJSONConversions strokeStylesFromPatterns:patterns
+                                                             strokeColor:self.polyline.strokeColor]
+           lengths:[FLTGoogleMapJSONConversions spanLengthsFromPatterns:patterns]];
+  }
 }
 
 @end
@@ -125,7 +145,7 @@ - (instancetype)init:(FlutterMethodChannel *)methodChannel
 }
 - (void)addPolylines:(NSArray *)polylinesToAdd {
   for (NSDictionary *polyline in polylinesToAdd) {
-    GMSMutablePath *path = [FLTPolylinesController getPath:polyline];
+    GMSMutablePath *path = [FLTPolylinesController pathForPolyline:polyline];
     NSString *identifier = polyline[@"polylineId"];
     FLTGoogleMapPolylineController *controller =
         [[FLTGoogleMapPolylineController alloc] initPolylineWithPath:path
@@ -171,7 +191,7 @@ - (bool)hasPolylineWithIdentifier:(NSString *)identifier {
   }
   return self.polylineIdentifierToController[identifier] != nil;
 }
-+ (GMSMutablePath *)getPath:(NSDictionary *)polyline {
++ (GMSMutablePath *)pathForPolyline:(NSDictionary *)polyline {
   NSArray *pointArray = polyline[@"points"];
   NSArray<CLLocation *> *points = [FLTGoogleMapJSONConversions pointsFromLatLongs:pointArray];
   GMSMutablePath *path = [GMSMutablePath path];

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapPolylineController_Test.h

@@ -0,0 +1,29 @@
+// Copyright 2013 The Flutter 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 "GoogleMapPolylineController.h"
+
+///
+/// Internal APIs exposed for unit testing
+///
+@interface FLTGoogleMapPolylineController (Test)
+
+///
+/// Polyline instance the controller is attached to
+///
+@property(strong, nonatomic) GMSPolyline *polyline;
+@end
+
+///
+/// Internal APIs explosed for unit testing
+///
+@interface FLTPolylinesController (Test)
+///
+/// Returns the path for polyline based on the points(locations) the polyline has.
+///
+/// @param polyline The polyline instance for which path is calculated.
+/// @return An instance of GMSMutablePath.
+///
++ (GMSMutablePath *)pathForPolyline:(NSDictionary *)polyline;
+@end

packages/google_maps_flutter/google_maps_flutter_ios/pubspec.yaml

@@ -2,7 +2,7 @@ name: google_maps_flutter_ios
 description: iOS implementation of the google_maps_flutter plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/google_maps_flutter_ios
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
-version: 2.6.0
+version: 2.6.1
 
 environment:
   sdk: ^3.2.3