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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import { GNode, DEFAULT_NODE_BUBBLE_RADIUS } from "../src/node";
import { Graph } from "./graph";
export const MINIMUM_EDGE_SEPARATION = 20;
export class Edge {
target: GNode;
source: GNode;
index: number;
type: string;
backEdgeNumber: number;
visible: boolean;
constructor(target: GNode, index: number, source: GNode, type: string) {
this.target = target;
this.source = source;
this.index = index;
this.type = type;
this.backEdgeNumber = 0;
this.visible = false;
}
stringID() {
return this.source.id + "," + this.index + "," + this.target.id;
}
isVisible() {
return this.visible && this.source.visible && this.target.visible;
}
getInputHorizontalPosition(graph: Graph, showTypes: boolean) {
if (this.backEdgeNumber > 0) {
return graph.maxGraphNodeX + this.backEdgeNumber * MINIMUM_EDGE_SEPARATION;
}
const source = this.source;
const target = this.target;
const index = this.index;
const inputX = target.x + target.getInputX(index);
const inputApproach = target.getInputApproach(this.index);
const outputApproach = source.getOutputApproach(showTypes);
if (inputApproach > outputApproach) {
return inputX;
} else {
const inputOffset = MINIMUM_EDGE_SEPARATION * (index + 1);
return (target.x < source.x)
? (target.x + target.getTotalNodeWidth() + inputOffset)
: (target.x - inputOffset);
}
}
generatePath(graph: Graph, showTypes: boolean) {
const target = this.target;
const source = this.source;
const inputX = target.x + target.getInputX(this.index);
const arrowheadHeight = 7;
const inputY = target.y - 2 * DEFAULT_NODE_BUBBLE_RADIUS - arrowheadHeight;
const outputX = source.x + source.getOutputX();
const outputY = source.y + source.getNodeHeight(showTypes) + DEFAULT_NODE_BUBBLE_RADIUS;
let inputApproach = target.getInputApproach(this.index);
const outputApproach = source.getOutputApproach(showTypes);
const horizontalPos = this.getInputHorizontalPosition(graph, showTypes);
let result = "M" + outputX + "," + outputY +
"L" + outputX + "," + outputApproach +
"L" + horizontalPos + "," + outputApproach;
if (horizontalPos != inputX) {
result += "L" + horizontalPos + "," + inputApproach;
} else {
if (inputApproach < outputApproach) {
inputApproach = outputApproach;
}
}
result += "L" + inputX + "," + inputApproach +
"L" + inputX + "," + inputY;
return result;
}
isBackEdge() {
return this.target.hasBackEdges() && (this.target.rank < this.source.rank);
}
}
export const edgeToStr = (e: Edge) => e.stringID();