Index: node_modules/d3-zoom/dist/d3-zoom.js
===================================================================
--- node_modules/d3-zoom/dist/d3-zoom.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-zoom/dist/d3-zoom.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,531 @@
+// https://d3js.org/d3-zoom/ v3.0.0 Copyright 2010-2021 Mike Bostock
+(function (global, factory) {
+typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-dispatch'), require('d3-drag'), require('d3-interpolate'), require('d3-selection'), require('d3-transition')) :
+typeof define === 'function' && define.amd ? define(['exports', 'd3-dispatch', 'd3-drag', 'd3-interpolate', 'd3-selection', 'd3-transition'], factory) :
+(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.d3 = global.d3 || {}, global.d3, global.d3, global.d3, global.d3, global.d3));
+}(this, (function (exports, d3Dispatch, d3Drag, d3Interpolate, d3Selection, d3Transition) { 'use strict';
+
+var constant = x => () => x;
+
+function ZoomEvent(type, {
+  sourceEvent,
+  target,
+  transform,
+  dispatch
+}) {
+  Object.defineProperties(this, {
+    type: {value: type, enumerable: true, configurable: true},
+    sourceEvent: {value: sourceEvent, enumerable: true, configurable: true},
+    target: {value: target, enumerable: true, configurable: true},
+    transform: {value: transform, enumerable: true, configurable: true},
+    _: {value: dispatch}
+  });
+}
+
+function Transform(k, x, y) {
+  this.k = k;
+  this.x = x;
+  this.y = y;
+}
+
+Transform.prototype = {
+  constructor: Transform,
+  scale: function(k) {
+    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
+  },
+  translate: function(x, y) {
+    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
+  },
+  apply: function(point) {
+    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
+  },
+  applyX: function(x) {
+    return x * this.k + this.x;
+  },
+  applyY: function(y) {
+    return y * this.k + this.y;
+  },
+  invert: function(location) {
+    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
+  },
+  invertX: function(x) {
+    return (x - this.x) / this.k;
+  },
+  invertY: function(y) {
+    return (y - this.y) / this.k;
+  },
+  rescaleX: function(x) {
+    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
+  },
+  rescaleY: function(y) {
+    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
+  },
+  toString: function() {
+    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+  }
+};
+
+var identity = new Transform(1, 0, 0);
+
+transform.prototype = Transform.prototype;
+
+function transform(node) {
+  while (!node.__zoom) if (!(node = node.parentNode)) return identity;
+  return node.__zoom;
+}
+
+function nopropagation(event) {
+  event.stopImmediatePropagation();
+}
+
+function noevent(event) {
+  event.preventDefault();
+  event.stopImmediatePropagation();
+}
+
+// Ignore right-click, since that should open the context menu.
+// except for pinch-to-zoom, which is sent as a wheel+ctrlKey event
+function defaultFilter(event) {
+  return (!event.ctrlKey || event.type === 'wheel') && !event.button;
+}
+
+function defaultExtent() {
+  var e = this;
+  if (e instanceof SVGElement) {
+    e = e.ownerSVGElement || e;
+    if (e.hasAttribute("viewBox")) {
+      e = e.viewBox.baseVal;
+      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+    }
+    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+  }
+  return [[0, 0], [e.clientWidth, e.clientHeight]];
+}
+
+function defaultTransform() {
+  return this.__zoom || identity;
+}
+
+function defaultWheelDelta(event) {
+  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
+}
+
+function defaultTouchable() {
+  return navigator.maxTouchPoints || ("ontouchstart" in this);
+}
+
+function defaultConstrain(transform, extent, translateExtent) {
+  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+  return transform.translate(
+    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
+    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
+  );
+}
+
+function zoom() {
+  var filter = defaultFilter,
+      extent = defaultExtent,
+      constrain = defaultConstrain,
+      wheelDelta = defaultWheelDelta,
+      touchable = defaultTouchable,
+      scaleExtent = [0, Infinity],
+      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+      duration = 250,
+      interpolate = d3Interpolate.interpolateZoom,
+      listeners = d3Dispatch.dispatch("start", "zoom", "end"),
+      touchstarting,
+      touchfirst,
+      touchending,
+      touchDelay = 500,
+      wheelDelay = 150,
+      clickDistance2 = 0,
+      tapDistance = 10;
+
+  function zoom(selection) {
+    selection
+        .property("__zoom", defaultTransform)
+        .on("wheel.zoom", wheeled, {passive: false})
+        .on("mousedown.zoom", mousedowned)
+        .on("dblclick.zoom", dblclicked)
+      .filter(touchable)
+        .on("touchstart.zoom", touchstarted)
+        .on("touchmove.zoom", touchmoved)
+        .on("touchend.zoom touchcancel.zoom", touchended)
+        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+  }
+
+  zoom.transform = function(collection, transform, point, event) {
+    var selection = collection.selection ? collection.selection() : collection;
+    selection.property("__zoom", defaultTransform);
+    if (collection !== selection) {
+      schedule(collection, transform, point, event);
+    } else {
+      selection.interrupt().each(function() {
+        gesture(this, arguments)
+          .event(event)
+          .start()
+          .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
+          .end();
+      });
+    }
+  };
+
+  zoom.scaleBy = function(selection, k, p, event) {
+    zoom.scaleTo(selection, function() {
+      var k0 = this.__zoom.k,
+          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+      return k0 * k1;
+    }, p, event);
+  };
+
+  zoom.scaleTo = function(selection, k, p, event) {
+    zoom.transform(selection, function() {
+      var e = extent.apply(this, arguments),
+          t0 = this.__zoom,
+          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
+          p1 = t0.invert(p0),
+          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+    }, p, event);
+  };
+
+  zoom.translateBy = function(selection, x, y, event) {
+    zoom.transform(selection, function() {
+      return constrain(this.__zoom.translate(
+        typeof x === "function" ? x.apply(this, arguments) : x,
+        typeof y === "function" ? y.apply(this, arguments) : y
+      ), extent.apply(this, arguments), translateExtent);
+    }, null, event);
+  };
+
+  zoom.translateTo = function(selection, x, y, p, event) {
+    zoom.transform(selection, function() {
+      var e = extent.apply(this, arguments),
+          t = this.__zoom,
+          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
+      return constrain(identity.translate(p0[0], p0[1]).scale(t.k).translate(
+        typeof x === "function" ? -x.apply(this, arguments) : -x,
+        typeof y === "function" ? -y.apply(this, arguments) : -y
+      ), e, translateExtent);
+    }, p, event);
+  };
+
+  function scale(transform, k) {
+    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+  }
+
+  function translate(transform, p0, p1) {
+    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
+    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+  }
+
+  function centroid(extent) {
+    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+  }
+
+  function schedule(transition, transform, point, event) {
+    transition
+        .on("start.zoom", function() { gesture(this, arguments).event(event).start(); })
+        .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).event(event).end(); })
+        .tween("zoom", function() {
+          var that = this,
+              args = arguments,
+              g = gesture(that, args).event(event),
+              e = extent.apply(that, args),
+              p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
+              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+              a = that.__zoom,
+              b = typeof transform === "function" ? transform.apply(that, args) : transform,
+              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+          return function(t) {
+            if (t === 1) t = b; // Avoid rounding error on end.
+            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
+            g.zoom(null, t);
+          };
+        });
+  }
+
+  function gesture(that, args, clean) {
+    return (!clean && that.__zooming) || new Gesture(that, args);
+  }
+
+  function Gesture(that, args) {
+    this.that = that;
+    this.args = args;
+    this.active = 0;
+    this.sourceEvent = null;
+    this.extent = extent.apply(that, args);
+    this.taps = 0;
+  }
+
+  Gesture.prototype = {
+    event: function(event) {
+      if (event) this.sourceEvent = event;
+      return this;
+    },
+    start: function() {
+      if (++this.active === 1) {
+        this.that.__zooming = this;
+        this.emit("start");
+      }
+      return this;
+    },
+    zoom: function(key, transform) {
+      if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+      if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+      if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+      this.that.__zoom = transform;
+      this.emit("zoom");
+      return this;
+    },
+    end: function() {
+      if (--this.active === 0) {
+        delete this.that.__zooming;
+        this.emit("end");
+      }
+      return this;
+    },
+    emit: function(type) {
+      var d = d3Selection.select(this.that).datum();
+      listeners.call(
+        type,
+        this.that,
+        new ZoomEvent(type, {
+          sourceEvent: this.sourceEvent,
+          target: zoom,
+          type,
+          transform: this.that.__zoom,
+          dispatch: listeners
+        }),
+        d
+      );
+    }
+  };
+
+  function wheeled(event, ...args) {
+    if (!filter.apply(this, arguments)) return;
+    var g = gesture(this, args).event(event),
+        t = this.__zoom,
+        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+        p = d3Selection.pointer(event);
+
+    // If the mouse is in the same location as before, reuse it.
+    // If there were recent wheel events, reset the wheel idle timeout.
+    if (g.wheel) {
+      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+        g.mouse[1] = t.invert(g.mouse[0] = p);
+      }
+      clearTimeout(g.wheel);
+    }
+
+    // If this wheel event won’t trigger a transform change, ignore it.
+    else if (t.k === k) return;
+
+    // Otherwise, capture the mouse point and location at the start.
+    else {
+      g.mouse = [p, t.invert(p)];
+      d3Transition.interrupt(this);
+      g.start();
+    }
+
+    noevent(event);
+    g.wheel = setTimeout(wheelidled, wheelDelay);
+    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+
+    function wheelidled() {
+      g.wheel = null;
+      g.end();
+    }
+  }
+
+  function mousedowned(event, ...args) {
+    if (touchending || !filter.apply(this, arguments)) return;
+    var currentTarget = event.currentTarget,
+        g = gesture(this, args, true).event(event),
+        v = d3Selection.select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
+        p = d3Selection.pointer(event, currentTarget),
+        x0 = event.clientX,
+        y0 = event.clientY;
+
+    d3Drag.dragDisable(event.view);
+    nopropagation(event);
+    g.mouse = [p, this.__zoom.invert(p)];
+    d3Transition.interrupt(this);
+    g.start();
+
+    function mousemoved(event) {
+      noevent(event);
+      if (!g.moved) {
+        var dx = event.clientX - x0, dy = event.clientY - y0;
+        g.moved = dx * dx + dy * dy > clickDistance2;
+      }
+      g.event(event)
+       .zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = d3Selection.pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
+    }
+
+    function mouseupped(event) {
+      v.on("mousemove.zoom mouseup.zoom", null);
+      d3Drag.dragEnable(event.view, g.moved);
+      noevent(event);
+      g.event(event).end();
+    }
+  }
+
+  function dblclicked(event, ...args) {
+    if (!filter.apply(this, arguments)) return;
+    var t0 = this.__zoom,
+        p0 = d3Selection.pointer(event.changedTouches ? event.changedTouches[0] : event, this),
+        p1 = t0.invert(p0),
+        k1 = t0.k * (event.shiftKey ? 0.5 : 2),
+        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
+
+    noevent(event);
+    if (duration > 0) d3Selection.select(this).transition().duration(duration).call(schedule, t1, p0, event);
+    else d3Selection.select(this).call(zoom.transform, t1, p0, event);
+  }
+
+  function touchstarted(event, ...args) {
+    if (!filter.apply(this, arguments)) return;
+    var touches = event.touches,
+        n = touches.length,
+        g = gesture(this, args, event.changedTouches.length === n).event(event),
+        started, i, t, p;
+
+    nopropagation(event);
+    for (i = 0; i < n; ++i) {
+      t = touches[i], p = d3Selection.pointer(t, this);
+      p = [p, this.__zoom.invert(p), t.identifier];
+      if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;
+      else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
+    }
+
+    if (touchstarting) touchstarting = clearTimeout(touchstarting);
+
+    if (started) {
+      if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);
+      d3Transition.interrupt(this);
+      g.start();
+    }
+  }
+
+  function touchmoved(event, ...args) {
+    if (!this.__zooming) return;
+    var g = gesture(this, args).event(event),
+        touches = event.changedTouches,
+        n = touches.length, i, t, p, l;
+
+    noevent(event);
+    for (i = 0; i < n; ++i) {
+      t = touches[i], p = d3Selection.pointer(t, this);
+      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;
+      else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
+    }
+    t = g.that.__zoom;
+    if (g.touch1) {
+      var p0 = g.touch0[0], l0 = g.touch0[1],
+          p1 = g.touch1[0], l1 = g.touch1[1],
+          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+      t = scale(t, Math.sqrt(dp / dl));
+      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+    }
+    else if (g.touch0) p = g.touch0[0], l = g.touch0[1];
+    else return;
+
+    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+  }
+
+  function touchended(event, ...args) {
+    if (!this.__zooming) return;
+    var g = gesture(this, args).event(event),
+        touches = event.changedTouches,
+        n = touches.length, i, t;
+
+    nopropagation(event);
+    if (touchending) clearTimeout(touchending);
+    touchending = setTimeout(function() { touchending = null; }, touchDelay);
+    for (i = 0; i < n; ++i) {
+      t = touches[i];
+      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;
+      else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
+    }
+    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
+    if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);
+    else {
+      g.end();
+      // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
+      if (g.taps === 2) {
+        t = d3Selection.pointer(t, this);
+        if (Math.hypot(touchfirst[0] - t[0], touchfirst[1] - t[1]) < tapDistance) {
+          var p = d3Selection.select(this).on("dblclick.zoom");
+          if (p) p.apply(this, arguments);
+        }
+      }
+    }
+  }
+
+  zoom.wheelDelta = function(_) {
+    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
+  };
+
+  zoom.filter = function(_) {
+    return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
+  };
+
+  zoom.touchable = function(_) {
+    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
+  };
+
+  zoom.extent = function(_) {
+    return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+  };
+
+  zoom.scaleExtent = function(_) {
+    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+  };
+
+  zoom.translateExtent = function(_) {
+    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+  };
+
+  zoom.constrain = function(_) {
+    return arguments.length ? (constrain = _, zoom) : constrain;
+  };
+
+  zoom.duration = function(_) {
+    return arguments.length ? (duration = +_, zoom) : duration;
+  };
+
+  zoom.interpolate = function(_) {
+    return arguments.length ? (interpolate = _, zoom) : interpolate;
+  };
+
+  zoom.on = function() {
+    var value = listeners.on.apply(listeners, arguments);
+    return value === listeners ? zoom : value;
+  };
+
+  zoom.clickDistance = function(_) {
+    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+  };
+
+  zoom.tapDistance = function(_) {
+    return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
+  };
+
+  return zoom;
+}
+
+exports.ZoomTransform = Transform;
+exports.zoom = zoom;
+exports.zoomIdentity = identity;
+exports.zoomTransform = transform;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
Index: node_modules/d3-zoom/dist/d3-zoom.min.js
===================================================================
--- node_modules/d3-zoom/dist/d3-zoom.min.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-zoom/dist/d3-zoom.min.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,2 @@
+// https://d3js.org/d3-zoom/ v3.0.0 Copyright 2010-2021 Mike Bostock
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports,require("d3-dispatch"),require("d3-drag"),require("d3-interpolate"),require("d3-selection"),require("d3-transition")):"function"==typeof define&&define.amd?define(["exports","d3-dispatch","d3-drag","d3-interpolate","d3-selection","d3-transition"],e):e((t="undefined"!=typeof globalThis?globalThis:t||self).d3=t.d3||{},t.d3,t.d3,t.d3,t.d3,t.d3)}(this,(function(t,e,n,o,i,r){"use strict";var u=t=>()=>t;function s(t,{sourceEvent:e,target:n,transform:o,dispatch:i}){Object.defineProperties(this,{type:{value:t,enumerable:!0,configurable:!0},sourceEvent:{value:e,enumerable:!0,configurable:!0},target:{value:n,enumerable:!0,configurable:!0},transform:{value:o,enumerable:!0,configurable:!0},_:{value:i}})}function h(t,e,n){this.k=t,this.x=e,this.y=n}h.prototype={constructor:h,scale:function(t){return 1===t?this:new h(this.k*t,this.x,this.y)},translate:function(t,e){return 0===t&0===e?this:new h(this.k,this.x+this.k*t,this.y+this.k*e)},apply:function(t){return[t[0]*this.k+this.x,t[1]*this.k+this.y]},applyX:function(t){return t*this.k+this.x},applyY:function(t){return t*this.k+this.y},invert:function(t){return[(t[0]-this.x)/this.k,(t[1]-this.y)/this.k]},invertX:function(t){return(t-this.x)/this.k},invertY:function(t){return(t-this.y)/this.k},rescaleX:function(t){return t.copy().domain(t.range().map(this.invertX,this).map(t.invert,t))},rescaleY:function(t){return t.copy().domain(t.range().map(this.invertY,this).map(t.invert,t))},toString:function(){return"translate("+this.x+","+this.y+") scale("+this.k+")"}};var a=new h(1,0,0);function c(t){for(;!t.__zoom;)if(!(t=t.parentNode))return a;return t.__zoom}function l(t){t.stopImmediatePropagation()}function f(t){t.preventDefault(),t.stopImmediatePropagation()}function p(t){return!(t.ctrlKey&&"wheel"!==t.type||t.button)}function m(){var t=this;return t instanceof SVGElement?(t=t.ownerSVGElement||t).hasAttribute("viewBox")?[[(t=t.viewBox.baseVal).x,t.y],[t.x+t.width,t.y+t.height]]:[[0,0],[t.width.baseVal.value,t.height.baseVal.value]]:[[0,0],[t.clientWidth,t.clientHeight]]}function v(){return this.__zoom||a}function d(t){return-t.deltaY*(1===t.deltaMode?.05:t.deltaMode?1:.002)*(t.ctrlKey?10:1)}function y(){return navigator.maxTouchPoints||"ontouchstart"in this}function g(t,e,n){var o=t.invertX(e[0][0])-n[0][0],i=t.invertX(e[1][0])-n[1][0],r=t.invertY(e[0][1])-n[0][1],u=t.invertY(e[1][1])-n[1][1];return t.translate(i>o?(o+i)/2:Math.min(0,o)||Math.max(0,i),u>r?(r+u)/2:Math.min(0,r)||Math.max(0,u))}c.prototype=h.prototype,t.ZoomTransform=h,t.zoom=function(){var t,c,z,_=p,x=m,k=g,w=d,b=y,T=[0,1/0],M=[[-1/0,-1/0],[1/0,1/0]],E=250,Y=o.interpolateZoom,X=e.dispatch("start","zoom","end"),q=500,D=0,P=10;function V(t){t.property("__zoom",v).on("wheel.zoom",O,{passive:!1}).on("mousedown.zoom",Z).on("dblclick.zoom",A).filter(b).on("touchstart.zoom",H).on("touchmove.zoom",N).on("touchend.zoom touchcancel.zoom",W).style("-webkit-tap-highlight-color","rgba(0,0,0,0)")}function B(t,e){return(e=Math.max(T[0],Math.min(T[1],e)))===t.k?t:new h(e,t.x,t.y)}function j(t,e,n){var o=e[0]-n[0]*t.k,i=e[1]-n[1]*t.k;return o===t.x&&i===t.y?t:new h(t.k,o,i)}function I(t){return[(+t[0][0]+ +t[1][0])/2,(+t[0][1]+ +t[1][1])/2]}function K(t,e,n,o){t.on("start.zoom",(function(){S(this,arguments).event(o).start()})).on("interrupt.zoom end.zoom",(function(){S(this,arguments).event(o).end()})).tween("zoom",(function(){var t=this,i=arguments,r=S(t,i).event(o),u=x.apply(t,i),s=null==n?I(u):"function"==typeof n?n.apply(t,i):n,a=Math.max(u[1][0]-u[0][0],u[1][1]-u[0][1]),c=t.__zoom,l="function"==typeof e?e.apply(t,i):e,f=Y(c.invert(s).concat(a/c.k),l.invert(s).concat(a/l.k));return function(t){if(1===t)t=l;else{var e=f(t),n=a/e[2];t=new h(n,s[0]-e[0]*n,s[1]-e[1]*n)}r.zoom(null,t)}}))}function S(t,e,n){return!n&&t.__zooming||new G(t,e)}function G(t,e){this.that=t,this.args=e,this.active=0,this.sourceEvent=null,this.extent=x.apply(t,e),this.taps=0}function O(t,...e){if(_.apply(this,arguments)){var n=S(this,e).event(t),o=this.__zoom,u=Math.max(T[0],Math.min(T[1],o.k*Math.pow(2,w.apply(this,arguments)))),s=i.pointer(t);if(n.wheel)n.mouse[0][0]===s[0]&&n.mouse[0][1]===s[1]||(n.mouse[1]=o.invert(n.mouse[0]=s)),clearTimeout(n.wheel);else{if(o.k===u)return;n.mouse=[s,o.invert(s)],r.interrupt(this),n.start()}f(t),n.wheel=setTimeout(h,150),n.zoom("mouse",k(j(B(o,u),n.mouse[0],n.mouse[1]),n.extent,M))}function h(){n.wheel=null,n.end()}}function Z(t,...e){if(!z&&_.apply(this,arguments)){var o=t.currentTarget,u=S(this,e,!0).event(t),s=i.select(t.view).on("mousemove.zoom",p,!0).on("mouseup.zoom",m,!0),h=i.pointer(t,o),a=t.clientX,c=t.clientY;n.dragDisable(t.view),l(t),u.mouse=[h,this.__zoom.invert(h)],r.interrupt(this),u.start()}function p(t){if(f(t),!u.moved){var e=t.clientX-a,n=t.clientY-c;u.moved=e*e+n*n>D}u.event(t).zoom("mouse",k(j(u.that.__zoom,u.mouse[0]=i.pointer(t,o),u.mouse[1]),u.extent,M))}function m(t){s.on("mousemove.zoom mouseup.zoom",null),n.dragEnable(t.view,u.moved),f(t),u.event(t).end()}}function A(t,...e){if(_.apply(this,arguments)){var n=this.__zoom,o=i.pointer(t.changedTouches?t.changedTouches[0]:t,this),r=n.invert(o),u=n.k*(t.shiftKey?.5:2),s=k(j(B(n,u),o,r),x.apply(this,e),M);f(t),E>0?i.select(this).transition().duration(E).call(K,s,o,t):i.select(this).call(V.transform,s,o,t)}}function H(e,...n){if(_.apply(this,arguments)){var o,u,s,h,a=e.touches,f=a.length,p=S(this,n,e.changedTouches.length===f).event(e);for(l(e),u=0;u<f;++u)s=a[u],h=[h=i.pointer(s,this),this.__zoom.invert(h),s.identifier],p.touch0?p.touch1||p.touch0[2]===h[2]||(p.touch1=h,p.taps=0):(p.touch0=h,o=!0,p.taps=1+!!t);t&&(t=clearTimeout(t)),o&&(p.taps<2&&(c=h[0],t=setTimeout((function(){t=null}),q)),r.interrupt(this),p.start())}}function N(t,...e){if(this.__zooming){var n,o,r,u,s=S(this,e).event(t),h=t.changedTouches,a=h.length;for(f(t),n=0;n<a;++n)o=h[n],r=i.pointer(o,this),s.touch0&&s.touch0[2]===o.identifier?s.touch0[0]=r:s.touch1&&s.touch1[2]===o.identifier&&(s.touch1[0]=r);if(o=s.that.__zoom,s.touch1){var c=s.touch0[0],l=s.touch0[1],p=s.touch1[0],m=s.touch1[1],v=(v=p[0]-c[0])*v+(v=p[1]-c[1])*v,d=(d=m[0]-l[0])*d+(d=m[1]-l[1])*d;o=B(o,Math.sqrt(v/d)),r=[(c[0]+p[0])/2,(c[1]+p[1])/2],u=[(l[0]+m[0])/2,(l[1]+m[1])/2]}else{if(!s.touch0)return;r=s.touch0[0],u=s.touch0[1]}s.zoom("touch",k(j(o,r,u),s.extent,M))}}function W(t,...e){if(this.__zooming){var n,o,r=S(this,e).event(t),u=t.changedTouches,s=u.length;for(l(t),z&&clearTimeout(z),z=setTimeout((function(){z=null}),q),n=0;n<s;++n)o=u[n],r.touch0&&r.touch0[2]===o.identifier?delete r.touch0:r.touch1&&r.touch1[2]===o.identifier&&delete r.touch1;if(r.touch1&&!r.touch0&&(r.touch0=r.touch1,delete r.touch1),r.touch0)r.touch0[1]=this.__zoom.invert(r.touch0[0]);else if(r.end(),2===r.taps&&(o=i.pointer(o,this),Math.hypot(c[0]-o[0],c[1]-o[1])<P)){var h=i.select(this).on("dblclick.zoom");h&&h.apply(this,arguments)}}}return V.transform=function(t,e,n,o){var i=t.selection?t.selection():t;i.property("__zoom",v),t!==i?K(t,e,n,o):i.interrupt().each((function(){S(this,arguments).event(o).start().zoom(null,"function"==typeof e?e.apply(this,arguments):e).end()}))},V.scaleBy=function(t,e,n,o){V.scaleTo(t,(function(){var t=this.__zoom.k,n="function"==typeof e?e.apply(this,arguments):e;return t*n}),n,o)},V.scaleTo=function(t,e,n,o){V.transform(t,(function(){var t=x.apply(this,arguments),o=this.__zoom,i=null==n?I(t):"function"==typeof n?n.apply(this,arguments):n,r=o.invert(i),u="function"==typeof e?e.apply(this,arguments):e;return k(j(B(o,u),i,r),t,M)}),n,o)},V.translateBy=function(t,e,n,o){V.transform(t,(function(){return k(this.__zoom.translate("function"==typeof e?e.apply(this,arguments):e,"function"==typeof n?n.apply(this,arguments):n),x.apply(this,arguments),M)}),null,o)},V.translateTo=function(t,e,n,o,i){V.transform(t,(function(){var t=x.apply(this,arguments),i=this.__zoom,r=null==o?I(t):"function"==typeof o?o.apply(this,arguments):o;return k(a.translate(r[0],r[1]).scale(i.k).translate("function"==typeof e?-e.apply(this,arguments):-e,"function"==typeof n?-n.apply(this,arguments):-n),t,M)}),o,i)},G.prototype={event:function(t){return t&&(this.sourceEvent=t),this},start:function(){return 1==++this.active&&(this.that.__zooming=this,this.emit("start")),this},zoom:function(t,e){return this.mouse&&"mouse"!==t&&(this.mouse[1]=e.invert(this.mouse[0])),this.touch0&&"touch"!==t&&(this.touch0[1]=e.invert(this.touch0[0])),this.touch1&&"touch"!==t&&(this.touch1[1]=e.invert(this.touch1[0])),this.that.__zoom=e,this.emit("zoom"),this},end:function(){return 0==--this.active&&(delete this.that.__zooming,this.emit("end")),this},emit:function(t){var e=i.select(this.that).datum();X.call(t,this.that,new s(t,{sourceEvent:this.sourceEvent,target:V,type:t,transform:this.that.__zoom,dispatch:X}),e)}},V.wheelDelta=function(t){return arguments.length?(w="function"==typeof t?t:u(+t),V):w},V.filter=function(t){return arguments.length?(_="function"==typeof t?t:u(!!t),V):_},V.touchable=function(t){return arguments.length?(b="function"==typeof t?t:u(!!t),V):b},V.extent=function(t){return arguments.length?(x="function"==typeof t?t:u([[+t[0][0],+t[0][1]],[+t[1][0],+t[1][1]]]),V):x},V.scaleExtent=function(t){return arguments.length?(T[0]=+t[0],T[1]=+t[1],V):[T[0],T[1]]},V.translateExtent=function(t){return arguments.length?(M[0][0]=+t[0][0],M[1][0]=+t[1][0],M[0][1]=+t[0][1],M[1][1]=+t[1][1],V):[[M[0][0],M[0][1]],[M[1][0],M[1][1]]]},V.constrain=function(t){return arguments.length?(k=t,V):k},V.duration=function(t){return arguments.length?(E=+t,V):E},V.interpolate=function(t){return arguments.length?(Y=t,V):Y},V.on=function(){var t=X.on.apply(X,arguments);return t===X?V:t},V.clickDistance=function(t){return arguments.length?(D=(t=+t)*t,V):Math.sqrt(D)},V.tapDistance=function(t){return arguments.length?(P=+t,V):P},V},t.zoomIdentity=a,t.zoomTransform=c,Object.defineProperty(t,"__esModule",{value:!0})}));