feat!: support of solid, dotted, dashed styles for polygons, with opt…

…imized rendering (#1865)

* feat!: support of solid, dotted, dashed styles for polygons, with optimized rendering

New files:
* `pixel_hiker.dart`: Pixel hikers that list the visible items on the way. Code used to be in `polyline_layer/painter.dart`, but was heavily refactored with #1854 in mind
* `visible_segment.dart`: Cohen-Sutherland algorithm to clip segments as visible into a canvas. Code used to be in `polygon_layer/painter.dart`, and was lightly refactored.

Impacted files:
* `polygon_layer/painter.dart`: now using new file `pixel_hiker.dart` for optimized rendering; moved "clip code" to new file `visible_segment.dart`; minor refactoring about parameter order consistency
* `polyline_layer/painter.dart`: now using new file `pixel_hiker.dart` for optimized rendering; moved "pixel hiker" to new file `pixel_hiker.dart`
* `pages/polygon.dart`: replaced `bool isDotted` with `PolylinePattern pattern` and in one case replaced it with "dashed"
* `polygon_layer/polygon.dart`: BREAKING - replaced `bool isDotted` with `PolylinePattern pattern`
* `polygon_layer/polygon_layer.dart`: minor refactoring
* `polyline_layer/polyline_layer.dart`: minor refactoring

* Renamed `PolylinePattern` to `StrokePattern`
Re-organised file structure

* Review changes

Co-authored-by: monsieurtanuki <fabrice_fontaine@hotmail.com>

* Update lib/src/layer/general/line_patterns/stroke_pattern.dart

Co-authored-by: Joscha <34318751+josxha@users.noreply.github.com>

* Update lib/src/layer/general/line_patterns/pixel_hiker.dart

Co-authored-by: Joscha <34318751+josxha@users.noreply.github.com>

* Update lib/src/layer/general/line_patterns/stroke_pattern.dart

Co-authored-by: Joscha <34318751+josxha@users.noreply.github.com>

* Minor file re-organisation

* Fixed bug

---------

Co-authored-by: JaffaKetchup <github@jaffaketchup.dev>
Co-authored-by: Joscha <34318751+josxha@users.noreply.github.com>

example/lib/pages/polygon.dart

@@ -55,12 +55,12 @@ class _PolygonPageState extends State<PolygonPage> {
  LatLng(46.22, -0.11),
  LatLng(44.399, 1.76),
  ],
- isDotted: true,
+ pattern: StrokePattern.dashed(segments: const [50, 20]),
  borderStrokeWidth: 4,
  borderColor: Colors.lightBlue,
  color: Colors.yellow,
  hitValue: (
- title: 'Polygon With Dotted Borders',
+ title: 'Polygon With Dashed Borders',
  subtitle: '...',
  ),
  ),
@@ -105,7 +105,7 @@ class _PolygonPageState extends State<PolygonPage> {
  LatLng(54, -14),
  LatLng(54, -18),
  ].map((latlng) => LatLng(latlng.latitude, latlng.longitude + 8)).toList(),
- isDotted: true,
+ pattern: const StrokePattern.dotted(),
  holePointsList: [
  const [
  LatLng(52, -17),
@@ -151,7 +151,7 @@ class _PolygonPageState extends State<PolygonPage> {
  ]
  .map((latlng) => LatLng(latlng.latitude - 6, latlng.longitude + 8))
  .toList(),
- isDotted: true,
+ pattern: const StrokePattern.dotted(),
  holePointsList: [
  const [
  LatLng(52, -17),

example/lib/pages/polyline.dart

@@ -104,7 +104,7 @@ class _PolylinePageState extends State<PolylinePage> {
  ],
  strokeWidth: 10,
  color: Colors.orange,
- pattern: const PolylinePattern.dotted(
+ pattern: const StrokePattern.dotted(
  spacingFactor: 3,
  ),
  borderStrokeWidth: 8,
@@ -138,7 +138,7 @@ class _PolylinePageState extends State<PolylinePage> {
  ],
  strokeWidth: 6,
  color: Colors.green[900]!,
- pattern: PolylinePattern.dashed(
+ pattern: StrokePattern.dashed(
  segments: const [50, 20, 30, 20],
  ),
  borderStrokeWidth: 6,

lib/flutter_map.dart

@@ -28,10 +28,11 @@ export 'package:flutter_map/src/layer/attribution_layer/rich/source.dart';
 export 'package:flutter_map/src/layer/attribution_layer/rich/widget.dart';
 export 'package:flutter_map/src/layer/attribution_layer/simple.dart';
 export 'package:flutter_map/src/layer/circle_layer/circle_layer.dart';
-export 'package:flutter_map/src/layer/general/hit_detection.dart';
-export 'package:flutter_map/src/layer/general/mobile_layer_transformer.dart';
-export 'package:flutter_map/src/layer/general/translucent_pointer.dart';
 export 'package:flutter_map/src/layer/marker_layer/marker_layer.dart';
+export 'package:flutter_map/src/layer/misc/hit_detection.dart';
+export 'package:flutter_map/src/layer/misc/line_patterns/stroke_pattern.dart';
+export 'package:flutter_map/src/layer/misc/mobile_layer_transformer.dart';
+export 'package:flutter_map/src/layer/misc/translucent_pointer.dart';
 export 'package:flutter_map/src/layer/overlay_image_layer/overlay_image_layer.dart';
 export 'package:flutter_map/src/layer/polygon_layer/polygon_layer.dart';
 export 'package:flutter_map/src/layer/polyline_layer/polyline_layer.dart';