From e5e73c78f04015c99536bce368a2330f297f4afe Mon Sep 17 00:00:00 2001
From: s-ol <s-ol@users.noreply.github.com>
Date: Fri, 5 Feb 2021 16:25:50 +0100
Subject: react-ify

---
 src/layout.js | 64 ++++++++++++++++-------------------------------------------
 1 file changed, 17 insertions(+), 47 deletions(-)

(limited to 'src/layout.js')

diff --git a/src/layout.js b/src/layout.js
index bda2886..b774c31 100644
--- a/src/layout.js
+++ b/src/layout.js
@@ -8,69 +8,39 @@ export default class Layout {
 		this.src = 'digraph { node [shape="rectangle"];\n';
   }
 
-  addNode(graph, node) {
-    if (node.dom.className === 'hidden')
-      return;
-
-    const id = node.data.id;
-    this.src += `  "${id}" [fixedsize=true; width=${node.dom.offsetWidth / 72}; height=${node.dom.offsetHeight / 72}];\n`;
-
-    for (const reply of node.data.replies) {
-      if (node.collapsed && graph[reply.id].collapsed)
-      	continue;
+  addNode(id, width, height) {
+    this.src += `  "${id}" [fixedsize=true; width=${width / 72}; height=${height / 72}];\n`;
+  }
 
-      this.src += `  "${id}" -> "${reply.id}";\n`;
-    }
+  addLink(from, to) {
+    this.src += `  "${from}" -> "${to}";\n`;
   }
 
-  async render(canvas, setPosition, setSize) {
+  async render() {
     this.src += '}';
 
     const info = await gv.renderJSONObject(this.src, { format: 'json0' });
+    const [width, height] = info.bb.split(',').map(toNumber).slice(2);
 
-    const [_x, _y, width, height] = info.bb.split(',').map(toNumber);
-
-    setSize(width, height);
-
+		const positions = {};
     for (const object of info.objects) {
       const [x, y] = object.pos.split(',').map(toNumber);
-      setPosition(object.name, x, height - y);
+      positions[object.name] = [ x, height - y ];
     }
 
-    const ctx = canvas.getContext('2d');
-    ctx.lineWidth = 4;
-    ctx.lineCap = 'round';
-    ctx.lineJoin = 'round';
-    ctx.strokeStyle = '#696969';
-    ctx.fillStyle = '#696969';
-
-    for (const edge of info.edges) {
+    const links = info.edges.map((edge) => {
       const pos = edge.pos.slice(2);
-      const points = pos.split(' ').map(p => {
+      return pos.split(' ').map(p => {
         const [x, y] = p.split(',');
         return [toNumber(x), height - toNumber(y)];
       });
 
-      ctx.beginPath();
-      ctx.moveTo(...points[1]);
-      for (let i = 4; i < points.length; i += 3) {
-        const [ax, ay] = points[i - 2];
-        const [bx, by] = points[i - 1];
-        const [x, y] = points[i];
-        ctx.bezierCurveTo(ax, ay, bx, by, x, y);
-      }
-      ctx.stroke();
+    });
 
-      const [lx, ly] = points[points.length - 1];
-      const [tx, ty] = points[0];
-      const [dx, dy] = [tx - lx, ty - ly];
-      const [hx, hy] = [dy*0.7, dx*-0.7];
-
-      ctx.beginPath();
-      ctx.moveTo(lx + dx*0.8, ly + dy*0.8);
-      ctx.lineTo(lx - dx*0.5 + hx, ly - dy*0.5 + hy);
-      ctx.lineTo(lx - dx*0.5 - hx, ly - dy*0.5 - hy);
-      ctx.fill();
-    }
+    return {
+      width, height,
+      positions,
+      links,
+    };
   }
 }
-- 
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