linear map index component created

demo/lib/App.tsx

@@ -22,11 +22,24 @@ import { AnnotationProp, Primer } from "../../src/elements";
 import Header from "./Header";
 import file from "./file";
 
+enum ViewerTypeOptions {
+  LINEAR="LINEAR",
+  CIRCULAR="CIRCULAR",
+  LINEAR_MAP="LINEAR_MAP",
+  BOTH_CIRCULAR="BOTH_CIRCULAR",
+  BOTH_FLIP_CIRCULAR="BOTH_FLIP_CIRCULAR",
+  BOTH_LINEAR_MAP="BOTH_LINEAR_MAP",
+  BOTH_FLIP_LINEAR_MAP="BOTH_FLIP_LINEAR_MAP"
+}
+
 const viewerTypeOptions = [
-  { key: "both", text: "Both", value: "both" },
-  { key: "circular", text: "Circular", value: "circular" },
-  { key: "linear", text: "Linear", value: "linear" },
-  { key: "both_flip", text: "Both Flip", value: "both_flip" },
+  { key: ViewerTypeOptions.CIRCULAR, text: "Circular", value: ViewerTypeOptions.CIRCULAR },
+  { key: ViewerTypeOptions.LINEAR, text: "Linear", value: ViewerTypeOptions.LINEAR },
+  { key: ViewerTypeOptions.LINEAR_MAP, text: "Linear Map", value: ViewerTypeOptions.LINEAR_MAP },
+  { key: ViewerTypeOptions.BOTH_CIRCULAR, text: "Circular + Linear", value: ViewerTypeOptions.BOTH_CIRCULAR },
+  { key: ViewerTypeOptions.BOTH_FLIP_CIRCULAR, text: "Linear + Circular", value: ViewerTypeOptions.BOTH_FLIP_CIRCULAR },
+  { key: ViewerTypeOptions.BOTH_LINEAR_MAP, text: "Linear Map + Linear", value: ViewerTypeOptions.BOTH_LINEAR_MAP },
+  { key: ViewerTypeOptions.BOTH_FLIP_LINEAR_MAP, text: "Linear  + Linear Map", value: ViewerTypeOptions.BOTH_FLIP_LINEAR_MAP }
 ];
 
 interface AppState {

src/LinearMap/Index.tsx

@@ -0,0 +1,57 @@
+import * as React from "react";
+import { indexLine, indexTick, indexTickLabel } from "../style";
+import { useBuilder } from "./hooks/useBuilder";
+import { Tick } from "./Tick";
+
+
+/**
+ * The Index component renders the Linear Map's:
+ * 		1. name (center or bottom)
+ * 		2. number of bps (center or bottom)
+ * 		3. index ticks and numbers along the Linear Map
+ */
+
+export interface IndexProps {
+  height: number
+  width: number
+  seqLength: number
+}
+
+export function Index(props: IndexProps) {
+  const { ruler, ticks } = useBuilder(props) 
+
+  return (
+    <g>
+
+      {/* The ticks and their index labels */}
+      {ticks.map((tick: Tick) => (
+        <g key={`la-vz-tick-${tick.position}`}>
+          <path
+            className="la-vz-index-tick"
+            d={tick.path}
+            style={indexTick}
+          />
+          <text
+            className="la-vz-index-tick-label"
+            style={indexTickLabel}
+            textAnchor="middle"
+            x={tick.text.x}
+            y={tick.text.y}
+          >
+            {tick.position}
+          </text>
+        </g>
+      ))
+    }
+
+      {/* The ruler is abstract line representing sequence length and giving relative references for other elements as Annotations, Cut sites, Primers, etc. */}
+      <g>
+        <path
+          className="la-vz-index-line"
+          d={ruler.path}
+          style={indexLine}
+        />
+      </g>
+    </g>
+  );
+}

src/LinearMap/Ruler.tsx

@@ -0,0 +1,30 @@
+export class Ruler {
+  readonly LATERAL_PADDING = 10
+
+  height: number
+  width: number
+  seqLength: number
+  start: number
+  end: number
+  padByBp: number
+
+  constructor(
+    height: number,
+    width: number,
+    seqLength: number
+  ) {
+    this.height = height/2
+    this.start = this.LATERAL_PADDING
+    this.end = width - this.LATERAL_PADDING
+    this.width = this.end - this.start
+    this.seqLength = seqLength
+    this.padByBp = this.width / seqLength
+  }
+
+  get path() {
+    return `
+      M ${this.start} ${this.height}
+      L ${this.end} ${this.height}
+    `
+  }
+} 

src/LinearMap/Tick.tsx

@@ -0,0 +1,72 @@
+import { Ruler } from "./Ruler"
+
+export class RulerTicks {
+  private readonly HORIZONTAL_TICK_LENGTH = 10
+  private readonly TICK_COUNT = 6
+  private ruler: Ruler
+
+  constructor(ruler: Ruler) {
+    this.ruler = ruler
+  }
+
+  private getPadByPosition(bpPosition: number) {
+    return this.ruler.start + this.ruler.padByBp * bpPosition
+  }
+
+  private getTickPath(position: number) {
+    const pad = this.getPadByPosition(position)
+    return `
+      M ${pad} ${this.ruler.height}
+      L ${pad} ${this.ruler.height + this.HORIZONTAL_TICK_LENGTH}
+    `
+  }
+
+  private getTickText(rightPad: number) {
+    const TICK_TEXT_LINE = this.HORIZONTAL_TICK_LENGTH * 2
+    const textLineHeight = this.ruler.height + TICK_TEXT_LINE 
+    return {
+      x: rightPad,
+      y: textLineHeight
+    }
+  }
+
+  private getTick(position: number): Tick {
+    const rightPad = this.getPadByPosition(position)
+    return {
+      position,
+      path: this.getTickPath(position),
+      text: this.getTickText(rightPad)
+    }
+  }
+
+  private buildTicks(positions: number[]) {
+    return positions.map(position => this.getTick(position))
+  }
+
+  get positions(): number[] {
+    const increments = Math.floor(this.ruler.seqLength / this.TICK_COUNT);
+    let indexInc = Math.max(+increments.toPrecision(2), 10);
+    while (indexInc % 10 !== 0) indexInc += 1;
+  //
+    let ticks: number[] = [];
+    for (let i = indexInc; i <= this.ruler.seqLength - indexInc; i += indexInc) {
+      ticks.push(i === 0 ? 1 : i);
+    }
+
+    return ticks
+  }
+
+  get ticks(): Tick[] {
+    return this.buildTicks(this.positions)
+  }
+} 
+
+
+export interface Tick {
+  position: number
+  path: string
+  text: {
+    x: number
+    y: number
+  }
+}

src/LinearMap/hooks/useBuilder.tsx

@@ -0,0 +1,18 @@
+import { useMemo } from "react"
+import { IndexProps } from "../Index"
+import { Ruler } from "../Ruler"
+import { RulerTicks } from "../Tick"
+
+type BuilderProps = IndexProps
+export function useBuilder({ height, width, seqLength }: BuilderProps) {
+  const { ruler, ticks } = useMemo(() => {
+    const ruler = new Ruler(height, width, seqLength)
+    const ticks = new RulerTicks(ruler).ticks
+    return { 
+      ruler,
+      ticks
+    }
+  }, [height, width, seqLength]) 
+
+  return { ruler, ticks }
+}