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// 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 });
})));