@blueprintjs/core
Version:
Core styles & components
92 lines • 5 kB
JavaScript
;
/*
* Copyright 2015 Palantir Technologies, Inc. All rights reserved.
*
* Licensed under the terms of the LICENSE file distributed with this project.
*/
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var classnames_1 = tslib_1.__importDefault(require("classnames"));
var React = tslib_1.__importStar(require("react"));
var abstractPureComponent_1 = require("../../common/abstractPureComponent");
var Classes = tslib_1.__importStar(require("../../common/classes"));
var errors_1 = require("../../common/errors");
var props_1 = require("../../common/props");
var utils_1 = require("../../common/utils");
// see http://stackoverflow.com/a/18473154/3124288 for calculating arc path
var R = 45;
var SPINNER_TRACK = "M 50,50 m 0,-" + R + " a " + R + "," + R + " 0 1 1 0," + R * 2 + " a " + R + "," + R + " 0 1 1 0,-" + R * 2;
// unitless total length of SVG path, to which stroke-dash* properties are relative.
// https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/pathLength
// this value is the result of `<path d={SPINNER_TRACK} />.getTotalLength()` and works in all browsers:
var PATH_LENGTH = 280;
var MIN_SIZE = 10;
var STROKE_WIDTH = 4;
var MIN_STROKE_WIDTH = 16;
var Spinner = /** @class */ (function (_super) {
tslib_1.__extends(Spinner, _super);
function Spinner() {
return _super !== null && _super.apply(this, arguments) || this;
}
Spinner.prototype.componentDidUpdate = function (prevProps) {
if (prevProps.value !== this.props.value) {
// IE/Edge: re-render after changing value to force SVG update
this.forceUpdate();
}
};
Spinner.prototype.render = function () {
var _a = this.props, className = _a.className, intent = _a.intent, value = _a.value, _b = _a.tagName, TagName = _b === void 0 ? "div" : _b;
var size = this.getSize();
var classes = classnames_1.default(Classes.SPINNER, Classes.intentClass(intent), (_c = {}, _c[Classes.SPINNER_NO_SPIN] = value != null, _c), className);
// keep spinner track width consistent at all sizes (down to about 10px).
var strokeWidth = Math.min(MIN_STROKE_WIDTH, (STROKE_WIDTH * Spinner.SIZE_LARGE) / size);
var strokeOffset = PATH_LENGTH - PATH_LENGTH * (value == null ? 0.25 : utils_1.clamp(value, 0, 1));
// multiple DOM elements around SVG are necessary to properly isolate animation:
// - SVG elements in IE do not support anim/trans so they must be set on a parent HTML element.
// - SPINNER_ANIMATION isolates svg from parent display and is always centered inside root element.
return (React.createElement(TagName, { className: classes },
React.createElement(TagName, { className: Classes.SPINNER_ANIMATION },
React.createElement("svg", { width: size, height: size, strokeWidth: strokeWidth.toFixed(2), viewBox: this.getViewBox(strokeWidth) },
React.createElement("path", { className: Classes.SPINNER_TRACK, d: SPINNER_TRACK }),
React.createElement("path", { className: Classes.SPINNER_HEAD, d: SPINNER_TRACK, pathLength: PATH_LENGTH, strokeDasharray: PATH_LENGTH + " " + PATH_LENGTH, strokeDashoffset: strokeOffset })))));
var _c;
};
Spinner.prototype.validateProps = function (_a) {
var _b = _a.className, className = _b === void 0 ? "" : _b, size = _a.size;
if (size != null && (className.indexOf(Classes.SMALL) >= 0 || className.indexOf(Classes.LARGE) >= 0)) {
console.warn(errors_1.SPINNER_WARN_CLASSES_SIZE);
}
};
/**
* Resolve size to a pixel value.
* Size can be set by className, props, default, or minimum constant.
*/
Spinner.prototype.getSize = function () {
var _a = this.props, _b = _a.className, className = _b === void 0 ? "" : _b, size = _a.size;
if (size == null) {
// allow Classes constants to determine default size.
if (className.indexOf(Classes.SMALL) >= 0) {
return Spinner.SIZE_SMALL;
}
else if (className.indexOf(Classes.LARGE) >= 0) {
return Spinner.SIZE_LARGE;
}
return Spinner.SIZE_STANDARD;
}
return Math.max(MIN_SIZE, size);
};
/** Compute viewbox such that stroked track sits exactly at edge of image frame. */
Spinner.prototype.getViewBox = function (strokeWidth) {
var radius = R + strokeWidth / 2;
var viewBoxX = (50 - radius).toFixed(2);
var viewBoxWidth = (radius * 2).toFixed(2);
return viewBoxX + " " + viewBoxX + " " + viewBoxWidth + " " + viewBoxWidth;
};
Spinner.displayName = props_1.DISPLAYNAME_PREFIX + ".Spinner";
Spinner.SIZE_SMALL = 20;
Spinner.SIZE_STANDARD = 50;
Spinner.SIZE_LARGE = 100;
return Spinner;
}(abstractPureComponent_1.AbstractPureComponent));
exports.Spinner = Spinner;
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