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import {Point, toPoint} from './Point';
/*
* @class Bounds
* @aka L.Bounds
*
* Represents a rectangular area in pixel coordinates.
*
* @example
*
* ```js
* var p1 = L.point(10, 10),
* p2 = L.point(40, 60),
* bounds = L.bounds(p1, p2);
* ```
*
* All Leaflet methods that accept `Bounds` objects also accept them in a simple Array form (unless noted otherwise), so the bounds example above can be passed like this:
*
* ```js
* otherBounds.intersects([[10, 10], [40, 60]]);
* ```
*
* Note that `Bounds` does not inherit from Leafet's `Class` object,
* which means new classes can't inherit from it, and new methods
* can't be added to it with the `include` function.
*/
export function Bounds(a, b) {
if (!a) { return; }
var points = b ? [a, b] : a;
for (var i = 0, len = points.length; i < len; i++) {
this.extend(points[i]);
}
}
Bounds.prototype = {
// @method extend(point: Point): this
// Extends the bounds to contain the given point.
extend: function (point) { // (Point)
point = toPoint(point);
// @property min: Point
// The top left corner of the rectangle.
// @property max: Point
// The bottom right corner of the rectangle.
if (!this.min && !this.max) {
this.min = point.clone();
this.max = point.clone();
} else {
this.min.x = Math.min(point.x, this.min.x);
this.max.x = Math.max(point.x, this.max.x);
this.min.y = Math.min(point.y, this.min.y);
this.max.y = Math.max(point.y, this.max.y);
}
return this;
},
// @method getCenter(round?: Boolean): Point
// Returns the center point of the bounds.
getCenter: function (round) {
return new Point(
(this.min.x + this.max.x) / 2,
(this.min.y + this.max.y) / 2, round);
},
// @method getBottomLeft(): Point
// Returns the bottom-left point of the bounds.
getBottomLeft: function () {
return new Point(this.min.x, this.max.y);
},
// @method getTopRight(): Point
// Returns the top-right point of the bounds.
getTopRight: function () { // -> Point
return new Point(this.max.x, this.min.y);
},
// @method getTopLeft(): Point
// Returns the top-left point of the bounds (i.e. [`this.min`](#bounds-min)).
getTopLeft: function () {
return this.min; // left, top
},
// @method getBottomRight(): Point
// Returns the bottom-right point of the bounds (i.e. [`this.max`](#bounds-max)).
getBottomRight: function () {
return this.max; // right, bottom
},
// @method getSize(): Point
// Returns the size of the given bounds
getSize: function () {
return this.max.subtract(this.min);
},
// @method contains(otherBounds: Bounds): Boolean
// Returns `true` if the rectangle contains the given one.
// @alternative
// @method contains(point: Point): Boolean
// Returns `true` if the rectangle contains the given point.
contains: function (obj) {
var min, max;
if (typeof obj[0] === 'number' || obj instanceof Point) {
obj = toPoint(obj);
} else {
obj = toBounds(obj);
}
if (obj instanceof Bounds) {
min = obj.min;
max = obj.max;
} else {
min = max = obj;
}
return (min.x >= this.min.x) &&
(max.x <= this.max.x) &&
(min.y >= this.min.y) &&
(max.y <= this.max.y);
},
// @method intersects(otherBounds: Bounds): Boolean
// Returns `true` if the rectangle intersects the given bounds. Two bounds
// intersect if they have at least one point in common.
intersects: function (bounds) { // (Bounds) -> Boolean
bounds = toBounds(bounds);
var min = this.min,
max = this.max,
min2 = bounds.min,
max2 = bounds.max,
xIntersects = (max2.x >= min.x) && (min2.x <= max.x),
yIntersects = (max2.y >= min.y) && (min2.y <= max.y);
return xIntersects && yIntersects;
},
// @method overlaps(otherBounds: Bounds): Boolean
// Returns `true` if the rectangle overlaps the given bounds. Two bounds
// overlap if their intersection is an area.
overlaps: function (bounds) { // (Bounds) -> Boolean
bounds = toBounds(bounds);
var min = this.min,
max = this.max,
min2 = bounds.min,
max2 = bounds.max,
xOverlaps = (max2.x > min.x) && (min2.x < max.x),
yOverlaps = (max2.y > min.y) && (min2.y < max.y);
return xOverlaps && yOverlaps;
},
isValid: function () {
return !!(this.min && this.max);
}
};
// @factory L.bounds(corner1: Point, corner2: Point)
// Creates a Bounds object from two corners coordinate pairs.
// @alternative
// @factory L.bounds(points: Point[])
// Creates a Bounds object from the given array of points.
export function toBounds(a, b) {
if (!a || a instanceof Bounds) {
return a;
}
return new Bounds(a, b);
}
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