/*
*  Copyright (C) 1998-2023 by Northwoods Software Corporation. All Rights Reserved.
*/

/*
* This is an extension and not part of the main GoJS library.
* Note that the API for this class may change with any version, even point releases.
* If you intend to use an extension in production, you should copy the code to your own source directory.
* Extensions can be found in the GoJS kit under the extensions or extensionsJSM folders.
* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
*/

import * as go from '../release/go.js';

// This file holds the definitions of several useful figures with rounded corners but straight sides:
// "RoundedTopRectangle", "RoundedBottomRectangle", "RoundedLeftRectangle", "RoundedRightRectangle",
// (each with rounded corners on one side) and "Capsule" (with rounded corners occupying opposite sides
// and parallel sides between them).
// The basic "RoundedRectangle" (corners on all four sides) is built into the GoJS library --
// you can see its definition in Figures.js.
// Two of these are demonstrated at ../samples/twoHalves.html and ../samples/roundedGroups.html.

go.Shape.defineFigureGenerator("RoundedTopRectangle", function (shape, w, h) {
  // this figure takes one parameter, the size of the corner
  let p1 = 5;  // default corner size
  if (shape !== null) {
    const param1 = shape.parameter1;
    if (!isNaN(param1) && param1 >= 0) p1 = param1;  // can't be negative or NaN
  }
  p1 = Math.min(p1, w/3);  // limit by width & height
  p1 = Math.min(p1, h);
  const geo = new go.Geometry();
  // a single figure consisting of straight lines and quarter-circle arcs
  geo.add(new go.PathFigure(0, p1)
    .add(new go.PathSegment(go.PathSegment.Arc, 180, 90, p1, p1, p1, p1))
    .add(new go.PathSegment(go.PathSegment.Line, w - p1, 0))
    .add(new go.PathSegment(go.PathSegment.Arc, 270, 90, w - p1, p1, p1, p1))
    .add(new go.PathSegment(go.PathSegment.Line, w, h))
    .add(new go.PathSegment(go.PathSegment.Line, 0, h).close()));
  // don't intersect with two top corners when used in an "Auto" Panel
  geo.spot1 = new go.Spot(0, 0, 0.3 * p1, 0.3 * p1);
  geo.spot2 = new go.Spot(1, 1, -0.3 * p1, 0);
  return geo;
});

go.Shape.defineFigureGenerator("RoundedBottomRectangle", function (shape, w, h) {
  // this figure takes one parameter, the size of the corner
  let p1 = 5;  // default corner size
  if (shape !== null) {
    var param1 = shape.parameter1;
    if (!isNaN(param1) && param1 >= 0) p1 = param1;  // can't be negative or NaN
  }
  p1 = Math.min(p1, w/3);  // limit by width & height
  p1 = Math.min(p1, h);
  const geo = new go.Geometry();
  // a single figure consisting of straight lines and quarter-circle arcs
  geo.add(new go.PathFigure(0, 0)
    .add(new go.PathSegment(go.PathSegment.Line, w, 0))
    .add(new go.PathSegment(go.PathSegment.Line, w, h - p1))
    .add(new go.PathSegment(go.PathSegment.Arc, 0, 90, w - p1, h - p1, p1, p1))
    .add(new go.PathSegment(go.PathSegment.Line, p1, h))
    .add(new go.PathSegment(go.PathSegment.Arc, 90, 90, p1, h - p1, p1, p1).close()));
  // don't intersect with two bottom corners when used in an "Auto" Panel
  geo.spot1 = new go.Spot(0, 0, 0.3 * p1, 0);
  geo.spot2 = new go.Spot(1, 1, -0.3 * p1, -0.3 * p1);
  return geo;
});

go.Shape.defineFigureGenerator("RoundedLeftRectangle", function (shape, w, h) {
  // this figure takes one parameter, the size of the corner
  let p1 = 5;  // default corner size
  if (shape !== null) {
    var param1 = shape.parameter1;
    if (!isNaN(param1) && param1 >= 0) p1 = param1;  // can't be negative or NaN
  }
  p1 = Math.min(p1, w);  // limit by width & height
  p1 = Math.min(p1, h/3);
  const geo = new go.Geometry();
  // a single figure consisting of straight lines and quarter-circle arcs
  geo.add(new go.PathFigure(w, 0)
    .add(new go.PathSegment(go.PathSegment.Line, w, h))
    .add(new go.PathSegment(go.PathSegment.Line, p1, h))
    .add(new go.PathSegment(go.PathSegment.Arc, 90, 90, p1, h - p1, p1, p1))
    .add(new go.PathSegment(go.PathSegment.Line, 0, p1))
    .add(new go.PathSegment(go.PathSegment.Arc, 180, 90, p1, p1, p1, p1).close()));
  // don't intersect with two top corners when used in an "Auto" Panel
  geo.spot1 = new go.Spot(0, 0, 0.3 * p1, 0.3 * p1);
  geo.spot2 = new go.Spot(1, 1, -0.3 * p1, 0);
  return geo;
});

go.Shape.defineFigureGenerator("RoundedRightRectangle", function (shape, w, h) {
  // this figure takes one parameter, the size of the corner
  let p1 = 5;  // default corner size
  if (shape !== null) {
    var param1 = shape.parameter1;
    if (!isNaN(param1) && param1 >= 0) p1 = param1;  // can't be negative or NaN
  }
  p1 = Math.min(p1, w);  // limit by width & height
  p1 = Math.min(p1, h/3);
  const geo = new go.Geometry();
  // a single figure consisting of straight lines and quarter-circle arcs
  geo.add(new go.PathFigure(0, 0)
    .add(new go.PathSegment(go.PathSegment.Line, w - p1, 0))
    .add(new go.PathSegment(go.PathSegment.Arc, 270, 90, w - p1, p1, p1, p1))
    .add(new go.PathSegment(go.PathSegment.Line, w, h - p1))
    .add(new go.PathSegment(go.PathSegment.Arc, 0, 90, w - p1, h - p1, p1, p1))
    .add(new go.PathSegment(go.PathSegment.Line, 0, h).close()));
  // don't intersect with two bottom corners when used in an "Auto" Panel
  geo.spot1 = new go.Spot(0, 0, 0.3 * p1, 0);
  geo.spot2 = new go.Spot(1, 1, -0.3 * p1, -0.3 * p1);
  return geo;
});


// narrow ends of rectangular area are completely rounded
go.Shape.defineFigureGenerator("Capsule", function(shape, w, h) {
  const geo = new go.Geometry();
  if (w < h) {
    const fig = new go.PathFigure(0, w/2, true);
    geo.add(fig);
    // Outline
    const f = w*0.156;
    fig.add(new go.PathSegment(go.PathSegment.Arc, 180, 180, w/2, w/2, w/2, w/2));
    fig.add(new go.PathSegment(go.PathSegment.Line, w, h-w/2));
    fig.add(new go.PathSegment(go.PathSegment.Arc, 0, 180, w/2, h-w/2, w/2, w/2));
    fig.add(new go.PathSegment(go.PathSegment.Line, 0, w/2));
    geo.spot1 = new go.Spot(0, 0, f, f);
    geo.spot2 = new go.Spot(1, 1, -f, -f);
    return geo;
  } else if (w > h) {
    const fig = new go.PathFigure(h/2, 0, true);
    geo.add(fig);
    // Outline
    const f = h*0.156;
    fig.add(new go.PathSegment(go.PathSegment.Line, w-h/2, 0));
    fig.add(new go.PathSegment(go.PathSegment.Arc, 270, 180, w-h/2, h/2, h/2, h/2));
    fig.add(new go.PathSegment(go.PathSegment.Line, w-h/2, h));
    fig.add(new go.PathSegment(go.PathSegment.Arc, 90, 180, h/2, h/2, h/2, h/2));
    geo.spot1 = new go.Spot(0, 0, f, f);
    geo.spot2 = new go.Spot(1, 1, -f, -f);
    return geo;
  } else {  // w === h
    geo.type = go.Geometry.Ellipse;
    geo.endX = w;
    geo.endY = h;
    const f = w*0.156;
    geo.spot1 = new go.Spot(0, 0, f, f);
    geo.spot2 = new go.Spot(1, 1, -f, -f);
    return geo;
  }
});