Issue #81: support lane drawing.

map_machine/constructor.py

@@ -29,7 +29,13 @@ from map_machine.icon import (
     ShapeSpecification,
 )
 from map_machine.map_configuration import DrawingMode, MapConfiguration
-from map_machine.osm_reader import OSMData, OSMNode, OSMRelation, OSMWay
+from map_machine.osm_reader import (
+    OSMData,
+    OSMNode,
+    OSMRelation,
+    OSMWay,
+    parse_levels,
+)
 from map_machine.point import Point
 from map_machine.scheme import DEFAULT_COLOR, LineStyle, RoadMatcher, Scheme
 from map_machine.text import Label
@@ -478,8 +484,7 @@ class Constructor:
 def check_level_number(tags: dict[str, Any], level: float) -> bool:
     """Check if element described by tags is no the specified level."""
     if "level" in tags:
-        levels: map = map(float, tags["level"].replace(",", ".").split(";"))
-        if level not in levels:
+        if level not in parse_levels(tags["level"]):
             return False
     else:
         return False

map_machine/figure.py

@@ -5,6 +5,7 @@ from typing import Any, Iterator, Optional
 
 import numpy as np
 from colour import Color
+from shapely.geometry import LineString
 from svgwrite import Drawing
 from svgwrite.container import Group
 from svgwrite.path import Path
@@ -42,24 +43,38 @@ class Figure(Tagged):
         )
 
     def get_path(
-        self, flinger: Flinger, shift: np.ndarray = np.array((0, 0))
+        self, flinger: Flinger, offset: np.ndarray = np.array((0, 0))
     ) -> str:
         """
         Get SVG path commands.
 
         :param flinger: converter for geo coordinates
-        :param shift: shift vector
+        :param offset: offset vector
         """
         path: str = ""
 
         for outer_nodes in self.outers:
-            path += f"{get_path(outer_nodes, shift, flinger)} "
+            path += f"{get_path(outer_nodes, offset, flinger)} "
 
         for inner_nodes in self.inners:
-            path += f"{get_path(inner_nodes, shift, flinger)} "
+            path += f"{get_path(inner_nodes, offset, flinger)} "
 
         return path
 
+    def get_outer_path(
+        self, flinger: Flinger, parallel_offset: float = 0
+    ) -> str:
+        """Get path of the first outer node list."""
+        points: list[tuple[float, float]] = [
+            tuple(flinger.fling(x.coordinates)) for x in self.outers[0]
+        ]
+        offset = LineString(points).parallel_offset(parallel_offset)
+
+        path: str = ""
+        for index, point in enumerate(offset.coords):
+            path += ("L" if index else "M") + f" {point[0]},{point[1]} "
+        return path[:-1]
+
 
 class Building(Figure):
     """
@@ -281,6 +296,25 @@ class Road(Figure):
         path.update(style)
         svg.add(path)
 
+    def draw_lanes(self, svg: Drawing, flinger: Flinger, color: Color) -> None:
+        scale: float = flinger.get_scale(self.outers[0][0].coordinates)
+        if len(self.lanes) < 2:
+            return
+        for index in range(1, len(self.lanes)):
+            shift = scale * (
+                -self.width / 2 + index * self.width / len(self.lanes)
+            )
+            path: Path = Path(d=self.get_outer_path(flinger, shift))
+            style: dict[str, Any] = {
+                "fill": "none",
+                "stroke": color.hex,
+                "stroke-linejoin": "round",
+                "stroke-width": 1,
+                "opacity": 0.5,
+            }
+            path.update(style)
+            svg.add(path)
+
 
 class Crater(Tagged):
     """

map_machine/mapper.py

@@ -77,11 +77,17 @@ class Map:
             layered_roads[road.layer].append(road)
 
         for layer in sorted(layered_roads.keys()):
-            roads = layered_roads[layer]
+            roads = sorted(
+                layered_roads[layer], key=lambda x: x.matcher.priority
+            )
             for road in roads:
                 road.draw(self.svg, self.flinger, road.matcher.border_color, 2)
             for road in roads:
                 road.draw(self.svg, self.flinger, road.matcher.color)
+            for road in roads:
+                road.draw_lanes(
+                    self.svg, self.flinger, road.matcher.border_color
+                )
 
         for tree in constructor.trees:
             tree.draw(self.svg, self.flinger, self.scheme)

map_machine/osm_reader.py

@@ -2,6 +2,7 @@
 Parse OSM XML file.
 """
 import json
+import logging
 import re
 from dataclasses import dataclass, field
 from datetime import datetime
@@ -20,9 +21,9 @@ __email__ = "me@enzet.ru"
 
 OSM_TIME_PATTERN: str = "%Y-%m-%dT%H:%M:%SZ"
 
-METERS_PATTERN = re.compile("^(?P<value>\\d*\\.?\\d*)\\s*m$")
-KILOMETERS_PATTERN = re.compile("^(?P<value>\\d*\\.?\\d*)\\s*km$")
-MILES_PATTERN = re.compile("^(?P<value>\\d*\\.?\\d*)\\s*mi$")
+METERS_PATTERN: re.Pattern = re.compile("^(?P<value>\\d*\\.?\\d*)\\s*m$")
+KILOMETERS_PATTERN: re.Pattern = re.compile("^(?P<value>\\d*\\.?\\d*)\\s*km$")
+MILES_PATTERN: re.Pattern = re.compile("^(?P<value>\\d*\\.?\\d*)\\s*mi$")
 
 
 # See https://wiki.openstreetmap.org/wiki/Lifecycle_prefix#Stages_of_decay
@@ -46,6 +47,16 @@ def parse_float(string: str) -> Optional[float]:
         return None
 
 
+def parse_levels(string: str) -> list[float]:
+    """Parse string representation of level sequence value."""
+    # TODO: add `-` parsing
+    try:
+        return list(map(float, string.replace(",", ".").split(";")))
+    except ValueError:
+        logging.warning(f"Cannot parse level description from `{string}`.")
+        return []
+
+
 @dataclass
 class Tagged:
     """
@@ -320,7 +331,7 @@ class OSMData:
         if node.user:
             self.authors.add(node.user)
         if node.tags.get("level"):
-            self.levels.add(float(node.tags.get("level")))
+            self.levels.union(parse_levels(node.tags["level"]))
         self.time.update(node.timestamp)
 
     def add_way(self, way: OSMWay) -> None:
@@ -333,7 +344,7 @@ class OSMData:
         if way.user:
             self.authors.add(way.user)
         if way.tags.get("level"):
-            self.levels.union(map(float, way.tags["level"].split(";")))
+            self.levels.union(parse_levels(way.tags["level"]))
         self.time.update(way.timestamp)
 
     def add_relation(self, relation: OSMRelation) -> None:

map_machine/scheme/default.yml

@@ -19,8 +19,7 @@ colors:
   barley_dark_color: "#908F62"
   sunflower_dark_color: "#DEAC4A"
 
-  # motorway_border_color: "#CC8800"
-  motorway_border_color: "#FFFFFF"
+  motorway_border_color: "#CC8800"
   motorway_color: "#FFAA33"
   primary_border_color: "#AA8800"
   primary_color: "#FFDD66"
@@ -1449,11 +1448,21 @@ roads:
     border_color: secondary_border_color
     priority: 41.8
     color: secondary_color
+  - tags: {highway: secondary_link}
+    default_width: 9
+    border_color: secondary_border_color
+    priority: 41.8
+    color: secondary_color
   - tags: {highway: tertiary}
     default_width: 7
     border_color: tertiary_border_color
     priority: 41.7
     color: tertiary_color
+  - tags: {highway: tertiary_link}
+    default_width: 7
+    border_color: tertiary_border_color
+    priority: 41.7
+    color: tertiary_color
   - tags: {highway: unclassified}
     default_width: 5
     border_color: road_border_color

tests/test_osm_reader.py

@@ -9,6 +9,7 @@ from map_machine.osm_reader import (
     OSMReader,
     OSMRelation,
     OSMWay,
+    parse_levels,
 )
 
 __author__ = "Sergey Vartanov"
@@ -104,3 +105,19 @@ def test_relation() -> None:
     assert len(relation.members) == 1
     assert relation.members[0].type_ == "way"
     assert relation.members[0].ref == 2
+
+
+def test_parse_levels() -> None:
+    """Test level parsing."""
+    assert parse_levels("1") == [1]
+    assert parse_levels("-1") == [-1]
+    assert parse_levels("1.5") == [1.5]
+    assert parse_levels("1,5") == [1.5]
+
+
+def test_parse_levels_list() -> None:
+    """Test list of levels parsing."""
+    assert parse_levels("0;1") == [0, 1]
+    assert parse_levels("0;2") == [0, 2]
+    assert parse_levels("0;2.5") == [0, 2.5]
+    assert parse_levels("0;2,5") == [0, 2.5]