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path: root/Map/Presentation/Base Components/MapRender/MapBackground.swift
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// Copyright (C) 2024 Rubén Beltrán del Río

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see https://map.tranquil.systems.
import Patterns
import SwiftUI
import WmapParser

struct MapBackground: View {

  let mapSize: CGSize
  let stages: [Double]

  var body: some View {
    ZStack(alignment: .topLeading) {
      PatternView(
        design: .constant(.stitch), pixelSize: 1.0, foregroundColor: .Theme.Map.stageForeground,
        backgroundColor: .Theme.Map.stageBackground
      )
      .frame(width: w(stages[0]), height: mapSize.height)
      PatternView(
        design: .constant(.shingles), pixelSize: 1.0, foregroundColor: .Theme.Map.stageForeground,
        backgroundColor: .Theme.Map.stageBackground
      )
      .offset(CGSize(width: w(stages[0]), height: 0))
      .frame(width: w(stages[1]) - w(stages[0]), height: mapSize.height)
      PatternView(
        design: .constant(.shadowGrid), pixelSize: 1.0, foregroundColor: .Theme.Map.stageForeground,
        backgroundColor: .Theme.Map.stageBackground
      )
      .offset(CGSize(width: w(stages[1]), height: 0))
      .frame(width: w(stages[2]) - w(stages[1]), height: mapSize.height)
      PatternView(
        design: .constant(.wicker), pixelSize: 1.0, foregroundColor: .Theme.Map.stageForeground,
        backgroundColor: .Theme.Map.stageBackground
      )
      .offset(CGSize(width: w(stages[2]), height: 0))
      .frame(width: mapSize.width - w(stages[2]), height: mapSize.height)
    }
  }

  func w(_ dimension: CGFloat) -> CGFloat {
    max(0.0, min(mapSize.width, dimension * mapSize.width / 100.0))
  }
}

#Preview {
  MapBackground(
    mapSize: CGSize(width: 200.0, height: 200.0),
    stages: [])
}