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/**
* @license Highcharts JS v7.1.1 (2019-04-09)
*
* (c) 2016-2019 Highsoft AS
* Authors: Jon Arild Nygard
*
* License: www.highcharts.com/license
*/
'use strict';
(function (factory) {
if (typeof module === 'object' && module.exports) {
factory['default'] = factory;
module.exports = factory;
} else if (typeof define === 'function' && define.amd) {
define('highcharts/modules/wordcloud', ['highcharts'], function (Highcharts) {
factory(Highcharts);
factory.Highcharts = Highcharts;
return factory;
});
} else {
factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
}
}(function (Highcharts) {
var _modules = Highcharts ? Highcharts._modules : {};
function _registerModule(obj, path, args, fn) {
if (!obj.hasOwnProperty(path)) {
obj[path] = fn.apply(null, args);
}
}
_registerModule(_modules, 'mixins/draw-point.js', [], function () {
var isFn = function (x) {
return typeof x === 'function';
};
/**
* Handles the drawing of a component.
* Can be used for any type of component that reserves the graphic property, and
* provides a shouldDraw on its context.
*
* @private
* @function draw
*
* @param {object} params
* Parameters.
*
* TODO: add type checking.
* TODO: export this function to enable usage
*/
var draw = function draw(params) {
var component = this,
graphic = component.graphic,
animatableAttribs = params.animatableAttribs,
onComplete = params.onComplete,
css = params.css,
renderer = params.renderer;
if (component.shouldDraw()) {
if (!graphic) {
component.graphic = graphic =
renderer[params.shapeType](params.shapeArgs).add(params.group);
}
graphic
.css(css)
.attr(params.attribs)
.animate(
animatableAttribs,
params.isNew ? false : undefined,
onComplete
);
} else if (graphic) {
var destroy = function () {
component.graphic = graphic = graphic.destroy();
if (isFn(onComplete)) {
onComplete();
}
};
// animate only runs complete callback if something was animated.
if (Object.keys(animatableAttribs).length) {
graphic.animate(animatableAttribs, undefined, function () {
destroy();
});
} else {
destroy();
}
}
};
/**
* An extended version of draw customized for points.
* It calls additional methods that is expected when rendering a point.
*
* @param {object} params Parameters
*/
var drawPoint = function drawPoint(params) {
var point = this,
attribs = params.attribs = params.attribs || {};
// Assigning class in dot notation does go well in IE8
// eslint-disable-next-line dot-notation
attribs['class'] = point.getClassName();
// Call draw to render component
draw.call(point, params);
};
return drawPoint;
});
_registerModule(_modules, 'mixins/polygon.js', [_modules['parts/Globals.js']], function (H) {
var deg2rad = H.deg2rad,
find = H.find,
isArray = H.isArray,
isNumber = H.isNumber;
/**
* Alternative solution to correctFloat.
* E.g H.correctFloat(123, 2) returns 120, when it should be 123.
*
* @private
* @function correctFloat
*
* @param {number} number
*
* @param {number} precision
*
* @return {number}
*/
var correctFloat = function (number, precision) {
var p = isNumber(precision) ? precision : 14,
magnitude = Math.pow(10, p);
return Math.round(number * magnitude) / magnitude;
};
/**
* Calculates the normals to a line between two points.
*
* @private
* @function getNormals
*
* @param {Array<number,number>} p1
* Start point for the line. Array of x and y value.
*
* @param {Array<number,number>} p2
* End point for the line. Array of x and y value.
*
* @return {Array<Array<number,number>>}
* Returns the two normals in an array.
*/
var getNormals = function getNormal(p1, p2) {
var dx = p2[0] - p1[0], // x2 - x1
dy = p2[1] - p1[1]; // y2 - y1
return [
[-dy, dx],
[dy, -dx]
];
};
/**
* Calculates the dot product of two coordinates. The result is a scalar value.
*
* @private
* @function dotProduct
*
* @param {Array<number,number>} a
* The x and y coordinates of the first point.
*
* @param {Array<number,number>} b
* The x and y coordinates of the second point.
*
* @return {number}
* Returns the dot product of a and b.
*/
var dotProduct = function dotProduct(a, b) {
var ax = a[0],
ay = a[1],
bx = b[0],
by = b[1];
return ax * bx + ay * by;
};
/**
* Projects a polygon onto a coordinate.
*
* @private
* @function project
*
* @param {Array<Array<number,number>>} polygon
* Array of points in a polygon.
*
* @param {Array<number,number>} target
* The coordinate of pr
*
* @return {object}
*/
var project = function project(polygon, target) {
var products = polygon.map(function (point) {
return dotProduct(point, target);
});
return {
min: Math.min.apply(this, products),
max: Math.max.apply(this, products)
};
};
/**
* Rotates a point clockwise around the origin.
*
* @private
* @function rotate2DToOrigin
*
* @param {Array<number,number>} point
* The x and y coordinates for the point.
*
* @param {number} angle
* The angle of rotation.
*
* @return {Array<number,number>}
* The x and y coordinate for the rotated point.
*/
var rotate2DToOrigin = function (point, angle) {
var x = point[0],
y = point[1],
rad = deg2rad * -angle,
cosAngle = Math.cos(rad),
sinAngle = Math.sin(rad);
return [
correctFloat(x * cosAngle - y * sinAngle),
correctFloat(x * sinAngle + y * cosAngle)
];
};
/**
* Rotate a point clockwise around another point.
*
* @private
* @function rotate2DToPoint
*
* @param {Array<number,number>} point
* The x and y coordinates for the point.
*
* @param {Array<number,numbner>} origin
* The point to rotate around.
*
* @param {number} angle
* The angle of rotation.
*
* @return {Array<number,number>}
* The x and y coordinate for the rotated point.
*/
var rotate2DToPoint = function (point, origin, angle) {
var x = point[0] - origin[0],
y = point[1] - origin[1],
rotated = rotate2DToOrigin([x, y], angle);
return [
rotated[0] + origin[0],
rotated[1] + origin[1]
];
};
var isAxesEqual = function (axis1, axis2) {
return (
axis1[0] === axis2[0] &&
axis1[1] === axis2[1]
);
};
var getAxesFromPolygon = function (polygon) {
var points,
axes = polygon.axes;
if (!isArray(axes)) {
axes = [];
points = points = polygon.concat([polygon[0]]);
points.reduce(
function findAxis(p1, p2) {
var normals = getNormals(p1, p2),
axis = normals[0]; // Use the left normal as axis.
// Check that the axis is unique.
if (!find(axes, function (existing) {
return isAxesEqual(existing, axis);
})) {
axes.push(axis);
}
// Return p2 to be used as p1 in next iteration.
return p2;
}
);
polygon.axes = axes;
}
return axes;
};
var getAxes = function (polygon1, polygon2) {
// Get the axis from both polygons.
var axes1 = getAxesFromPolygon(polygon1),
axes2 = getAxesFromPolygon(polygon2);
return axes1.concat(axes2);
};
var getPolygon = function (x, y, width, height, rotation) {
var origin = [x, y],
left = x - (width / 2),
right = x + (width / 2),
top = y - (height / 2),
bottom = y + (height / 2),
polygon = [
[left, top],
[right, top],
[right, bottom],
[left, bottom]
];
return polygon.map(function (point) {
return rotate2DToPoint(point, origin, -rotation);
});
};
var getBoundingBoxFromPolygon = function (points) {
return points.reduce(function (obj, point) {
var x = point[0],
y = point[1];
obj.left = Math.min(x, obj.left);
obj.right = Math.max(x, obj.right);
obj.bottom = Math.max(y, obj.bottom);
obj.top = Math.min(y, obj.top);
return obj;
}, {
left: Number.MAX_VALUE,
right: -Number.MAX_VALUE,
bottom: -Number.MAX_VALUE,
top: Number.MAX_VALUE
});
};
var isPolygonsOverlappingOnAxis = function (axis, polygon1, polygon2) {
var projection1 = project(polygon1, axis),
projection2 = project(polygon2, axis),
isOverlapping = !(
projection2.min > projection1.max ||
projection2.max < projection1.min
);
return !isOverlapping;
};
/**
* Checks wether two convex polygons are colliding by using the Separating Axis
* Theorem.
*
* @private
* @function isPolygonsColliding
*
* @param {Array<Array<number,number>>} polygon1
* First polygon.
*
* @param {Array<Array<number,number>>} polygon2
* Second polygon.
*
* @return {boolean}
* Returns true if they are colliding, otherwise false.
*/
var isPolygonsColliding = function isPolygonsColliding(polygon1, polygon2) {
var axes = getAxes(polygon1, polygon2),
overlappingOnAllAxes = !find(axes, function (axis) {
return isPolygonsOverlappingOnAxis(axis, polygon1, polygon2);
});
return overlappingOnAllAxes;
};
var movePolygon = function (deltaX, deltaY, polygon) {
return polygon.map(function (point) {
return [
point[0] + deltaX,
point[1] + deltaY
];
});
};
var collision = {
getBoundingBoxFromPolygon: getBoundingBoxFromPolygon,
getPolygon: getPolygon,
isPolygonsColliding: isPolygonsColliding,
movePolygon: movePolygon,
rotate2DToOrigin: rotate2DToOrigin,
rotate2DToPoint: rotate2DToPoint
};
return collision;
});
_registerModule(_modules, 'modules/wordcloud.src.js', [_modules['parts/Globals.js'], _modules['mixins/draw-point.js'], _modules['mixins/polygon.js']], function (H, drawPoint, polygon) {
/* *
* Experimental Highcharts module which enables visualization of a word cloud.
*
* (c) 2016-2019 Highsoft AS
*
* Authors: Jon Arild Nygard
*
* License: www.highcharts.com/license
*/
var extend = H.extend,
isArray = H.isArray,
isNumber = H.isNumber,
isObject = H.isObject,
merge = H.merge,
noop = H.noop,
find = H.find,
getBoundingBoxFromPolygon = polygon.getBoundingBoxFromPolygon,
getPolygon = polygon.getPolygon,
isPolygonsColliding = polygon.isPolygonsColliding,
movePolygon = polygon.movePolygon,
Series = H.Series;
/**
* Detects if there is a collision between two rectangles.
*
* @private
* @function isRectanglesIntersecting
*
* @param {object} r1
* First rectangle.
*
* @param {object} r2
* Second rectangle.
*
* @return {boolean}
* Returns true if the rectangles overlap.
*/
function isRectanglesIntersecting(r1, r2) {
return !(
r2.left > r1.right ||
r2.right < r1.left ||
r2.top > r1.bottom ||
r2.bottom < r1.top
);
}
/**
* Detects if a word collides with any previously placed words.
*
* @private
* @function intersectsAnyWord
*
* @param {Highcharts.Point} point
* Point which the word is connected to.
*
* @param {Array<Highcharts.Point>} points
* Previously placed points to check against.
*
* @return {boolean}
* Returns true if there is collision.
*/
function intersectsAnyWord(point, points) {
var intersects = false,
rect = point.rect,
polygon = point.polygon,
lastCollidedWith = point.lastCollidedWith,
isIntersecting = function (p) {
var result = isRectanglesIntersecting(rect, p.rect);
if (result && (point.rotation % 90 || p.roation % 90)) {
result = isPolygonsColliding(
polygon,
p.polygon
);
}
return result;
};
// If the point has already intersected a different point, chances are they
// are still intersecting. So as an enhancement we check this first.
if (lastCollidedWith) {
intersects = isIntersecting(lastCollidedWith);
// If they no longer intersects, remove the cache from the point.
if (!intersects) {
delete point.lastCollidedWith;
}
}
// If not already found, then check if we can find a point that is
// intersecting.
if (!intersects) {
intersects = !!find(points, function (p) {
var result = isIntersecting(p);
if (result) {
point.lastCollidedWith = p;
}
return result;
});
}
return intersects;
}
/**
* Gives a set of cordinates for an Archimedian Spiral.
*
* @private
* @function archimedeanSpiral
*
* @param {number} attempt
* How far along the spiral we have traversed.
*
* @param {object} params
* Additional parameters.
*
* @param {object} params.field
* Size of field.
*
* @return {boolean|object}
* Resulting coordinates, x and y. False if the word should be dropped
* from the visualization.
*/
function archimedeanSpiral(attempt, params) {
var field = params.field,
result = false,
maxDelta = (field.width * field.width) + (field.height * field.height),
t = attempt * 0.8; // 0.2 * 4 = 0.8. Enlarging the spiral.
// Emergency brake. TODO make spiralling logic more foolproof.
if (attempt <= 10000) {
result = {
x: t * Math.cos(t),
y: t * Math.sin(t)
};
if (!(Math.min(Math.abs(result.x), Math.abs(result.y)) < maxDelta)) {
result = false;
}
}
return result;
}
/**
* Gives a set of cordinates for an rectangular spiral.
*
* @private
* @function squareSpiral
*
* @param {number} attempt
* How far along the spiral we have traversed.
*
* @param {object} params
* Additional parameters.
*
* @return {boolean|object}
* Resulting coordinates, x and y. False if the word should be dropped
* from the visualization.
*/
function squareSpiral(attempt) {
var a = attempt * 4,
k = Math.ceil((Math.sqrt(a) - 1) / 2),
t = 2 * k + 1,
m = Math.pow(t, 2),
isBoolean = function (x) {
return typeof x === 'boolean';
},
result = false;
t -= 1;
if (attempt <= 10000) {
if (isBoolean(result) && a >= m - t) {
result = {
x: k - (m - a),
y: -k
};
}
m -= t;
if (isBoolean(result) && a >= m - t) {
result = {
x: -k,
y: -k + (m - a)
};
}
m -= t;
if (isBoolean(result)) {
if (a >= m - t) {
result = {
x: -k + (m - a),
y: k
};
} else {
result = {
x: k,
y: k - (m - a - t)
};
}
}
result.x *= 5;
result.y *= 5;
}
return result;
}
/**
* Gives a set of cordinates for an rectangular spiral.
*
* @private
* @function rectangularSpiral
*
* @param {number} attempt
* How far along the spiral we have traversed.
*
* @param {object} params
* Additional parameters.
*
* @return {boolean|object}
* Resulting coordinates, x and y. False if the word should be dropped
* from the visualization.
*/
function rectangularSpiral(attempt, params) {
var result = squareSpiral(attempt, params),
field = params.field;
if (result) {
result.x *= field.ratioX;
result.y *= field.ratioY;
}
return result;
}
/**
* @private
* @function getRandomPosition
*
* @param {number} size
*
* @return {number}
*/
function getRandomPosition(size) {
return Math.round((size * (Math.random() + 0.5)) / 2);
}
/**
* Calculates the proper scale to fit the cloud inside the plotting area.
*
* @private
* @function getScale
*
* @param {number} targetWidth
* Width of target area.
*
* @param {number} targetHeight
* Height of target area.
*
* @param {object} field
* The playing field.
*
* @param {Highcharts.Series} series
* Series object.
*
* @return {number}
* Returns the value to scale the playing field up to the size of the
* target area.
*/
function getScale(targetWidth, targetHeight, field) {
var height = Math.max(Math.abs(field.top), Math.abs(field.bottom)) * 2,
width = Math.max(Math.abs(field.left), Math.abs(field.right)) * 2,
scaleX = width > 0 ? 1 / width * targetWidth : 1,
scaleY = height > 0 ? 1 / height * targetHeight : 1;
return Math.min(scaleX, scaleY);
}
/**
* Calculates what is called the playing field. The field is the area which all
* the words are allowed to be positioned within. The area is proportioned to
* match the target aspect ratio.
*
* @private
* @function getPlayingField
*
* @param {number} targetWidth
* Width of the target area.
*
* @param {number} targetHeight
* Height of the target area.
*
* @param {Array<Highcharts.Point>} data
* Array of points.
*
* @param {object} data.dimensions
* The height and width of the word.
*
* @return {object}
* The width and height of the playing field.
*/
function getPlayingField(
targetWidth,
targetHeight,
data
) {
var info = data.reduce(function (obj, point) {
var dimensions = point.dimensions,
x = Math.max(dimensions.width, dimensions.height);
// Find largest height.
obj.maxHeight = Math.max(obj.maxHeight, dimensions.height);
// Find largest width.
obj.maxWidth = Math.max(obj.maxWidth, dimensions.width);
// Sum up the total maximum area of all the words.
obj.area += x * x;
return obj;
}, {
maxHeight: 0,
maxWidth: 0,
area: 0
}),
/**
* Use largest width, largest height, or root of total area to give size
* to the playing field.
*/
x = Math.max(
info.maxHeight, // Have enough space for the tallest word
info.maxWidth, // Have enough space for the broadest word
// Adjust 15% to account for close packing of words
Math.sqrt(info.area) * 0.85
),
ratioX = targetWidth > targetHeight ? targetWidth / targetHeight : 1,
ratioY = targetHeight > targetWidth ? targetHeight / targetWidth : 1;
return {
width: x * ratioX,
height: x * ratioY,
ratioX: ratioX,
ratioY: ratioY
};
}
/**
* Calculates a number of degrees to rotate, based upon a number of orientations
* within a range from-to.
*
* @private
* @function getRotation
*
* @param {number} orientations
* Number of orientations.
*
* @param {number} index
* Index of point, used to decide orientation.
*
* @param {number} from
* The smallest degree of rotation.
*
* @param {number} to
* The largest degree of rotation.
*
* @return {boolean|number}
* Returns the resulting rotation for the word. Returns false if invalid
* input parameters.
*/
function getRotation(orientations, index, from, to) {
var result = false, // Default to false
range,
intervals,
orientation;
// Check if we have valid input parameters.
if (
isNumber(orientations) &&
isNumber(index) &&
isNumber(from) &&
isNumber(to) &&
orientations > -1 &&
index > -1 &&
to > from
) {
range = to - from;
intervals = range / (orientations - 1);
orientation = index % orientations;
result = from + (orientation * intervals);
}
return result;
}
/**
* Calculates the spiral positions and store them in scope for quick access.
*
* @private
* @function getSpiral
*
* @param {Function} fn
* The spiral function.
*
* @param {object} params
* Additional parameters for the spiral.
*
* @return {Function}
* Function with access to spiral positions.
*/
function getSpiral(fn, params) {
var length = 10000,
i,
arr = [];
for (i = 1; i < length; i++) {
arr.push(fn(i, params));
}
return function (attempt) {
return attempt <= length ? arr[attempt - 1] : false;
};
}
/**
* Detects if a word is placed outside the playing field.
*
* @private
* @function outsidePlayingField
*
* @param {Highcharts.Point} point
* Point which the word is connected to.
*
* @param {object} field
* The width and height of the playing field.
*
* @return {boolean}
* Returns true if the word is placed outside the field.
*/
function outsidePlayingField(rect, field) {
var playingField = {
left: -(field.width / 2),
right: field.width / 2,
top: -(field.height / 2),
bottom: field.height / 2
};
return !(
playingField.left < rect.left &&
playingField.right > rect.right &&
playingField.top < rect.top &&
playingField.bottom > rect.bottom
);
}
/**
* Check if a point intersects with previously placed words, or if it goes
* outside the field boundaries. If a collision, then try to adjusts the
* position.
*
* @private
* @function intersectionTesting
*
* @param {Highcharts.Point} point
* Point to test for intersections.
*
* @param {object} options
* Options object.
*
* @return {boolean|object}
* Returns an object with how much to correct the positions. Returns
* false if the word should not be placed at all.
*/
function intersectionTesting(point, options) {
var placed = options.placed,
field = options.field,
rectangle = options.rectangle,
polygon = options.polygon,
spiral = options.spiral,
attempt = 1,
delta = {
x: 0,
y: 0
},
// Make a copy to update values during intersection testing.
rect = point.rect = extend({}, rectangle);
point.polygon = polygon;
point.rotation = options.rotation;
/* while w intersects any previously placed words:
do {
move w a little bit along a spiral path
} while any part of w is outside the playing field and
the spiral radius is still smallish */
while (
delta !== false &&
(
intersectsAnyWord(point, placed) ||
outsidePlayingField(rect, field)
)
) {
delta = spiral(attempt);
if (isObject(delta)) {
// Update the DOMRect with new positions.
rect.left = rectangle.left + delta.x;
rect.right = rectangle.right + delta.x;
rect.top = rectangle.top + delta.y;
rect.bottom = rectangle.bottom + delta.y;
point.polygon = movePolygon(delta.x, delta.y, polygon);
}
attempt++;
}
return delta;
}
/**
* Extends the playing field to have enough space to fit a given word.
*
* @private
* @function extendPlayingField
*
* @param {object} field
* The width, height and ratios of a playing field.
*
* @param {object} rectangle
* The bounding box of the word to add space for.
*
* @return {object}
* Returns the extended playing field with updated height and width.
*/
function extendPlayingField(field, rectangle) {
var height, width, ratioX, ratioY, x, extendWidth, extendHeight, result;
if (isObject(field) && isObject(rectangle)) {
height = (rectangle.bottom - rectangle.top);
width = (rectangle.right - rectangle.left);
ratioX = field.ratioX;
ratioY = field.ratioY;
// Use the same variable to extend both the height and width.
x = ((width * ratioX) > (height * ratioY)) ? width : height;
// Multiply variable with ratios to preserve aspect ratio.
extendWidth = x * ratioX;
extendHeight = x * ratioY;
// Calculate the size of the new field after adding space for the word.
result = merge(field, {
// Add space on the left and right.
width: field.width + (extendWidth * 2),
// Add space on the top and bottom.
height: field.height + (extendHeight * 2)
});
} else {
result = field;
}
// Return the new extended field.
return result;
}
/**
* If a rectangle is outside a give field, then the boundaries of the field is
* adjusted accordingly. Modifies the field object which is passed as the first
* parameter.
*
* @private
* @function updateFieldBoundaries
*
* @param {object} field
* The bounding box of a playing field.
*
* @param {object} placement
* The bounding box for a placed point.
*
* @return {object}
* Returns a modified field object.
*/
function updateFieldBoundaries(field, rectangle) {
// TODO improve type checking.
if (!isNumber(field.left) || field.left > rectangle.left) {
field.left = rectangle.left;
}
if (!isNumber(field.right) || field.right < rectangle.right) {
field.right = rectangle.right;
}
if (!isNumber(field.top) || field.top > rectangle.top) {
field.top = rectangle.top;
}
if (!isNumber(field.bottom) || field.bottom < rectangle.bottom) {
field.bottom = rectangle.bottom;
}
return field;
}
/**
* A word cloud is a visualization of a set of words, where the size and
* placement of a word is determined by how it is weighted.
*
* @sample highcharts/demo/wordcloud
* Word Cloud chart
*
* @extends plotOptions.column
* @excluding allAreas, boostThreshold, clip, colorAxis, compare,
* compareBase, crisp, cropTreshold, dataGrouping, dataLabels,
* depth, edgeColor, findNearestPointBy, getExtremesFromAll,
* grouping, groupPadding, groupZPadding, joinBy, maxPointWidth,
* minPointLength, navigatorOptions, negativeColor, pointInterval,
* pointIntervalUnit, pointPadding, pointPlacement, pointRange,
* pointStart, pointWidth, pointStart, pointWidth, shadow,
* showCheckbox, showInNavigator, softThreshold, stacking,
* threshold, zoneAxis, zones
* @product highcharts
* @since 6.0.0
* @optionparent plotOptions.wordcloud
*/
var wordCloudOptions = {
/**
* If there is no space for a word on the playing field, then this option
* will allow the playing field to be extended to fit the word. If false
* then the word will be dropped from the visualization.
*
* NB! This option is currently not decided to be published in the API, and
* is therefore marked as private.
*
* @private
*/
allowExtendPlayingField: true,
animation: {
duration: 500
},
borderWidth: 0,
clip: false, // Something goes wrong with clip. // @todo fix this
colorByPoint: true,
/**
* A threshold determining the minimum font size that can be applied to a
* word.
*/
minFontSize: 1,
/**
* The word with the largest weight will have a font size equal to this
* value. The font size of a word is the ratio between its weight and the
* largest occuring weight, multiplied with the value of maxFontSize.
*/
maxFontSize: 25,
/**
* This option decides which algorithm is used for placement, and rotation
* of a word. The choice of algorith is therefore a crucial part of the
* resulting layout of the wordcloud. It is possible for users to add their
* own custom placement strategies for use in word cloud. Read more about it
* in our
* [documentation](https://www.highcharts.com/docs/chart-and-series-types/word-cloud-series#custom-placement-strategies)
*
* @validvalue: ["center", "random"]
*/
placementStrategy: 'center',
/**
* Rotation options for the words in the wordcloud.
*
* @sample highcharts/plotoptions/wordcloud-rotation
* Word cloud with rotation
*/
rotation: {
/**
* The smallest degree of rotation for a word.
*/
from: 0,
/**
* The number of possible orientations for a word, within the range of
* `rotation.from` and `rotation.to`.
*/
orientations: 2,
/**
* The largest degree of rotation for a word.
*/
to: 90
},
showInLegend: false,
/**
* Spiral used for placing a word after the initial position experienced a
* collision with either another word or the borders.
* It is possible for users to add their own custom spiralling algorithms
* for use in word cloud. Read more about it in our
* [documentation](https://www.highcharts.com/docs/chart-and-series-types/word-cloud-series#custom-spiralling-algorithm)
*
* @validvalue: ["archimedean", "rectangular", "square"]
*/
spiral: 'rectangular',
/**
* CSS styles for the words.
*
* @type {Highcharts.CSSObject}
* @default {"fontFamily":"sans-serif", "fontWeight": "900"}
*/
style: {
/** @ignore-option */
fontFamily: 'sans-serif',
/** @ignore-option */
fontWeight: '900'
},
tooltip: {
followPointer: true,
pointFormat: '<span style="color:{point.color}">\u25CF</span> {series.name}: <b>{point.weight}</b><br/>'
}
};
// Properties of the WordCloud series.
var wordCloudSeries = {
animate: Series.prototype.animate,
animateDrilldown: noop,
animateDrillupFrom: noop,
bindAxes: function () {
var wordcloudAxis = {
endOnTick: false,
gridLineWidth: 0,
lineWidth: 0,
maxPadding: 0,
startOnTick: false,
title: null,
tickPositions: []
};
Series.prototype.bindAxes.call(this);
extend(this.yAxis.options, wordcloudAxis);
extend(this.xAxis.options, wordcloudAxis);
},
pointAttribs: function (point, state) {
var attribs = H.seriesTypes.column.prototype
.pointAttribs.call(this, point, state);
delete attribs.stroke;
delete attribs['stroke-width'];
return attribs;
},
/**
* Calculates the fontSize of a word based on its weight.
*
* @private
* @function Highcharts.Series#deriveFontSize
*
* @param {number} [relativeWeight=0]
* The weight of the word, on a scale 0-1.
*
* @param {number} [maxFontSize=1]
* The maximum font size of a word.
*
* @param {number} [minFontSize=1]
* The minimum font size of a word.
*
* @return {number}
* Returns the resulting fontSize of a word. If minFontSize is
* larger then maxFontSize the result will equal minFontSize.
*/
deriveFontSize: function deriveFontSize(
relativeWeight,
maxFontSize,
minFontSize
) {
var weight = isNumber(relativeWeight) ? relativeWeight : 0,
max = isNumber(maxFontSize) ? maxFontSize : 1,
min = isNumber(minFontSize) ? minFontSize : 1;
return Math.floor(Math.max(min, weight * max));
},
drawPoints: function () {
var series = this,
hasRendered = series.hasRendered,
xAxis = series.xAxis,
yAxis = series.yAxis,
chart = series.chart,
group = series.group,
options = series.options,
animation = options.animation,
allowExtendPlayingField = options.allowExtendPlayingField,
renderer = chart.renderer,
testElement = renderer.text().add(group),
placed = [],
placementStrategy = series.placementStrategy[
options.placementStrategy
],
spiral,
rotation = options.rotation,
scale,
weights = series.points
.map(function (p) {
return p.weight;
}),
maxWeight = Math.max.apply(null, weights),
data = series.points
.sort(function (a, b) {
return b.weight - a.weight; // Sort descending
}),
field;
// Get the dimensions for each word.
// Used in calculating the playing field.
data.forEach(function (point) {
var relativeWeight = 1 / maxWeight * point.weight,
fontSize = series.deriveFontSize(
relativeWeight,
options.maxFontSize,
options.minFontSize
),
css = extend({
fontSize: fontSize + 'px'
}, options.style),
bBox;
testElement.css(css).attr({
x: 0,
y: 0,
text: point.name
});
bBox = testElement.getBBox(true);
point.dimensions = {
height: bBox.height,
width: bBox.width
};
});
// Calculate the playing field.
field = getPlayingField(xAxis.len, yAxis.len, data);
spiral = getSpiral(series.spirals[options.spiral], {
field: field
});
// Draw all the points.
data.forEach(function (point) {
var relativeWeight = 1 / maxWeight * point.weight,
fontSize = series.deriveFontSize(
relativeWeight,
options.maxFontSize,
options.minFontSize
),
css = extend({
fontSize: fontSize + 'px'
}, options.style),
placement = placementStrategy(point, {
data: data,
field: field,
placed: placed,
rotation: rotation
}),
attr = extend(
series.pointAttribs(point, point.selected && 'select'),
{
align: 'center',
'alignment-baseline': 'middle',
x: placement.x,
y: placement.y,
text: point.name,
rotation: placement.rotation
}
),
polygon = getPolygon(
placement.x,
placement.y,
point.dimensions.width,
point.dimensions.height,
placement.rotation
),
rectangle = getBoundingBoxFromPolygon(polygon),
delta = intersectionTesting(point, {
rectangle: rectangle,
polygon: polygon,
field: field,
placed: placed,
spiral: spiral,
rotation: placement.rotation
}),
animate;
// If there is no space for the word, extend the playing field.
if (!delta && allowExtendPlayingField) {
// Extend the playing field to fit the word.
field = extendPlayingField(field, rectangle);
// Run intersection testing one more time to place the word.
delta = intersectionTesting(point, {
rectangle: rectangle,
polygon: polygon,
field: field,
placed: placed,
spiral: spiral,
rotation: placement.rotation
});
}
// Check if point was placed, if so delete it, otherwise place it on
// the correct positions.
if (isObject(delta)) {
attr.x += delta.x;
attr.y += delta.y;
rectangle.left += delta.x;
rectangle.right += delta.x;
rectangle.top += delta.y;
rectangle.bottom += delta.y;
field = updateFieldBoundaries(field, rectangle);
placed.push(point);
point.isNull = false;
} else {
point.isNull = true;
}
if (animation) {
// Animate to new positions
animate = {
x: attr.x,
y: attr.y
};
// Animate from center of chart
if (!hasRendered) {
attr.x = 0;
attr.y = 0;
// or animate from previous position
} else {
delete attr.x;
delete attr.y;
}
}
point.draw({
animatableAttribs: animate,
attribs: attr,
css: css,
group: group,
renderer: renderer,
shapeArgs: undefined,
shapeType: 'text'
});
});
// Destroy the element after use.
testElement = testElement.destroy();
// Scale the series group to fit within the plotArea.
scale = getScale(xAxis.len, yAxis.len, field);
series.group.attr({
scaleX: scale,
scaleY: scale
});
},
hasData: function () {
var series = this;
return (
isObject(series) &&
series.visible === true &&
isArray(series.points) &&
series.points.length > 0
);
},
// Strategies used for deciding rotation and initial position of a word. To
// implement a custom strategy, have a look at the function random for
// example.
placementStrategy: {
random: function (point, options) {
var field = options.field,
r = options.rotation;
return {
x: getRandomPosition(field.width) - (field.width / 2),
y: getRandomPosition(field.height) - (field.height / 2),
rotation: getRotation(r.orientations, point.index, r.from, r.to)
};
},
center: function (point, options) {
var r = options.rotation;
return {
x: 0,
y: 0,
rotation: getRotation(r.orientations, point.index, r.from, r.to)
};
}
},
pointArrayMap: ['weight'],
// Spirals used for placing a word after the initial position experienced a
// collision with either another word or the borders. To implement a custom
// spiral, look at the function archimedeanSpiral for example.
spirals: {
'archimedean': archimedeanSpiral,
'rectangular': rectangularSpiral,
'square': squareSpiral
},
utils: {
extendPlayingField: extendPlayingField,
getRotation: getRotation,
isPolygonsColliding: isPolygonsColliding,
rotate2DToOrigin: polygon.rotate2DToOrigin,
rotate2DToPoint: polygon.rotate2DToPoint
},
getPlotBox: function () {
var series = this,
chart = series.chart,
inverted = chart.inverted,
// Swap axes for inverted (#2339)
xAxis = series[(inverted ? 'yAxis' : 'xAxis')],
yAxis = series[(inverted ? 'xAxis' : 'yAxis')],
width = xAxis ? xAxis.len : chart.plotWidth,
height = yAxis ? yAxis.len : chart.plotHeight,
x = xAxis ? xAxis.left : chart.plotLeft,
y = yAxis ? yAxis.top : chart.plotTop;
return {
translateX: x + (width / 2),
translateY: y + (height / 2),
scaleX: 1, // #1623
scaleY: 1
};
}
};
// Properties of the Sunburst series.
var wordCloudPoint = {
draw: drawPoint,
shouldDraw: function shouldDraw() {
var point = this;
return !point.isNull;
},
isValid: function isValid() {
return true;
},
weight: 1
};
/**
* A `wordcloud` series. If the [type](#series.wordcloud.type) option is not
* specified, it is inherited from [chart.type](#chart.type).
*
* @extends series,plotOptions.wordcloud
* @product highcharts
* @apioption series.wordcloud
*/
/**
* An array of data points for the series. For the `wordcloud` series type,
* points can be given in the following ways:
*
* 1. An array of arrays with 2 values. In this case, the values correspond to
* `name,weight`.
* ```js
* data: [
* ['Lorem', 4],
* ['Ipsum', 1]
* ]
* ```
*
* 2. An array of objects with named values. The following snippet shows only a
* few settings, see the complete options set below. If the total number of
* data points exceeds the series'
* [turboThreshold](#series.arearange.turboThreshold), this option is not
* available.
* ```js
* data: [{
* name: "Lorem",
* weight: 4
* }, {
* name: "Ipsum",
* weight: 1
* }]
* ```
*
* @type {Array<Array<string,number>|*>}
* @extends series.line.data
* @excluding drilldown, marker, x, y
* @product highcharts
* @apioption series.wordcloud.data
*/
/**
* The name decides the text for a word.
*
* @type {string}
* @since 6.0.0
* @product highcharts
* @apioption series.sunburst.data.name
*/
/**
* The weighting of a word. The weight decides the relative size of a word
* compared to the rest of the collection.
*
* @type {number}
* @since 6.0.0
* @product highcharts
* @apioption series.sunburst.data.weight
*/
/**
* @private
* @class
* @name Highcharts.seriesTypes.wordcloud
*
* @augments Highcharts.Series
*/
H.seriesType(
'wordcloud',
'column',
wordCloudOptions,
wordCloudSeries,
wordCloudPoint
);
});
_registerModule(_modules, 'masters/modules/wordcloud.src.js', [], function () {
});
}));