Add chart_forground_style_scale modifier

Sources/LiveViewNativeCharts/ChartsRegistry.swift

@@ -25,6 +25,7 @@ public struct ChartsRegistry<Root: RootRegistry>: CustomRegistry {
     }
 
     public enum ModifierType: String {
+        case chartForegroundStyleScale = "chart_foreground_style_scale"
         case chartXAxis = "chart_x_axis"
         case chartYAxis = "chart_y_axis"
         case chartXScale = "chart_x_scale"
@@ -33,6 +34,8 @@ public struct ChartsRegistry<Root: RootRegistry>: CustomRegistry {
 
     public static func decodeModifier(_ type: ModifierType, from decoder: Decoder) throws -> some ViewModifier {
         switch type {
+        case .chartForegroundStyleScale:
+          try ChartForegroundStyleScaleModifier(from: decoder)
         case .chartXAxis:
             try ChartXAxisModifier<Root>(from: decoder)
         case .chartYAxis:

Sources/LiveViewNativeCharts/LiveViewNativeCharts.docc/Extensions/Chart.md

@@ -6,6 +6,8 @@
 }
 
 ## Topics
+### Foreground Style Scale Modifiers
+- ``ChartForegroundStyleScaleModifier``
 ### Axis Modifiers
 - ``ChartXAxisModifier``
 - ``ChartYAxisModifier``

Sources/LiveViewNativeCharts/LiveViewNativeCharts.docc/Extensions/ChartForegroundStyleScaleModifier.md

@@ -0,0 +1,5 @@
+# ``LiveViewNativeCharts/ChartForegroundStyleScaleModifier``
+
+@Metadata {
+    @DocumentationExtension(mergeBehavior: append)
+    @DisplayName("chart_foreground_style_scale", style: symbol)

Sources/LiveViewNativeCharts/Modifiers/View Fundamentals Modifiers/ChartForegroundStyleScale.swift

@@ -0,0 +1,135 @@
+//
+//  ChartForegroundStyleScale.swift
+//  
+//
+//  Created by murtza on 28/06/2023.
+//
+
+import Charts
+import SwiftUI
+import LiveViewNative
+
+/// The ``mapping`` Maps data categories to foreground styles.
+///
+/// See ``LiveViewNativeCharts/LiveViewNative/SwiftUI/AnyShapeStyle`` for a list of possible values.
+///
+/// ```html
+/// <Chart modifiers={chart_foreground_style_scale(mapping: %{
+///     "A" => {:color, :blue},
+///     "B" => {:opacity, 0.5}
+/// })}>
+///   ...
+/// </Chart>
+/// ```
+///
+/// The possible data values plotted as foreground style in the chart. You can define the ``domain`` with an array for categorical values (e.g., ["A", "B", "C"])
+///
+/// See ``LiveViewNativeCharts/Charts/AnyScaleDomain`` for more details.
+///
+/// ```html
+/// <Chart modifiers={chart_foreground_style_scale(domain: ["A", "B", "C"])}>
+///   ...
+/// </Chart>
+/// ```
+///
+/// The ``range`` of foreground styles that correspond to the scale domain.
+///
+/// See ``LiveViewNativeCharts/LiveViewNative/SwiftUI/AnyShapeStyle`` for a list of possible values.
+///
+/// ```html
+/// <Chart modifiers={chart_foreground_style_scale(range: [:circle, :asterisk, :plus])}>
+///   ...
+/// </Chart>
+/// ```
+///
+/// The ``type`` provides the ways you can scale the domain or range of a plot.
+///
+/// See ``LiveViewNativeCharts/Charts/ScaleType`` for a list of possible values.
+///
+/// ```html
+/// <Chart modifiers={chart_foreground_style_scale(type: :category)}>
+///   ...
+/// </Chart>
+/// ```
+///
+/// ## Arguments
+/// * ``mapping``
+/// * ``domain``
+/// * ``range``
+/// * ``type``
+#if swift(>=5.8)
+@_documentation(visibility: public)
+#endif
+struct ChartForegroundStyleScaleModifier: ViewModifier, Decodable {
+    /// The ``mapping`` Maps data categories to foreground styles.
+    ///
+    /// Create a mapping between a string and a ``LiveViewNativeCharts/LiveViewNative/SwiftUI/AnyShapeStyle``.
+    ///
+    /// ```elixir
+    /// %{
+    ///     "A" => :circle,
+    ///     "B" => :asterisk,
+    ///     "C" => :square
+    /// }
+    /// ```
+    #if swift(>=5.8)
+    @_documentation(visibility: public)
+    #endif
+    private let mapping: [String:AnyShapeStyle]?
+
+    struct Mapping: Decodable {
+        let value: String
+        let symbol: AnyShapeStyle
+    }
+
+    /// The possible data values plotted as foreground style in the chart.
+    ///
+    /// See ``LiveViewNativeCharts/Charts/AnyScaleDomain`` for more details.
+    #if swift(>=5.8)
+    @_documentation(visibility: public)
+    #endif
+    private let domain: AnyScaleDomain?
+
+    /// The ``range`` of foreground styles that correspond to the scale domain.
+    ///
+    /// See ``LiveViewNativeCharts/Charts/BasicChartSymbolShape`` for a list of possible values.
+    #if swift(>=5.8)
+    @_documentation(visibility: public)
+    #endif
+    private let range: [BasicChartSymbolShape]?
+
+    /// The scale type.
+    ///
+    /// See ``LiveViewNativeCharts/Charts/ScaleType`` for a list of possible values.
+    #if swift(>=5.8)
+    @_documentation(visibility: public)
+    #endif
+    private let type: ScaleType?
+
+    func body(content: Content) -> some View {
+        if let mapping {
+            if case let .some(.values(domain)) = domain {
+                content.chartForegroundStyleScale(domain: domain) { key in
+                    mapping[key]!
+                }
+            } else {
+                content.chartForegroundStyleScale(domain: mapping.keys.sorted()) { key in
+                    mapping[key]!
+                }
+            }
+        } else {
+            switch (domain, range, type) {
+            case let (domain?, range?, type?):
+                content.chartForegroundStyleScale(domain: domain, range: range, type: type)
+            case let (domain?, nil, type?):
+                content.chartForegroundStyleScale(domain: domain, type: type)
+            case let (nil, range?, type?):
+                content.chartForegroundStyleScale(range: range, type: type)
+            case (nil, nil, type?):
+                content.chartForegroundStyleScale(type: type)
+            case (nil, nil, nil):
+                content
+            }
+        }
+    }
+}

lib/live_view_native_swift_ui_charts/modifiers/view_fundamentals/chart_foreground_style_scale.ex

@@ -0,0 +1,13 @@
+defmodule LiveViewNativeSwiftUiCharts.Modifiers.ChartForegroundStyleScale do
+  use LiveViewNativePlatform.Modifier
+
+  alias LiveViewNativeSwiftUiCharts.Types.{ScaleDomain, ShapeStyle, ScaleType}
+  alias LiveViewNativeSwiftUi.Types.ShapeStyle
+
+  modifier_schema "chart_symbol_scale" do
+    field :mapping, {:map, ShapeStyle}
+    field :domain, ScaleDomain
+    field :range, {:array, ShapeStyle}
+    field :type, ScaleType
+  end
+end