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Clamp.js
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Clamp.js
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'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _react = require('react');
var _react2 = _interopRequireDefault(_react);
var _merge = require('lodash/merge');
var _merge2 = _interopRequireDefault(_merge);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
var _requestAnimationFrame_ = typeof requestAnimationFrame === 'function' ? requestAnimationFrame : function (cb) {
return cb();
};
var _cancelAnimationFrame_ = typeof cancelAnimationFrame === 'function' ? cancelAnimationFrame : function (cb) {
return cb();
};
var Clamp = function (_React$Component) {
_inherits(Clamp, _React$Component);
function Clamp(props) {
_classCallCheck(this, Clamp);
var _this = _possibleConstructorReturn(this, (Clamp.__proto__ || Object.getPrototypeOf(Clamp)).call(this, props));
_this.adjustIntervalHandler = null;
_this.requestAnimationFrameHandler = null;
_this.rawContextText = null;
_this.autoAdjustInterval = 300;
if (Number.isInteger(_this.props.autoAdjustInterval)) _this.autoAdjustInterval = Math.abs(_this.props.autoAdjustInterval);
return _this;
}
_createClass(Clamp, [{
key: '_getWrapRect_',
value: function _getWrapRect_() {
return this.refs.wrap.getBoundingClientRect();
}
}, {
key: '_getContextRect_',
value: function _getContextRect_() {
return this.refs.context.getBoundingClientRect();
}
}, {
key: 'adjustContext',
value: function adjustContext(callback) {
var _this2 = this;
this.refs.context.innerHTML = this.rawContextText;
var heightOfWrap = this._getWrapRect_().height;
var heightOfContext = this._getContextRect_().height;
if (heightOfContext > heightOfWrap) {
var text = this.rawContextText;
var ellipsis = this.props.ellipsis || '';
var low = 0,
high = text.length,
mid = void 0;
var count = 0;
var clamp = function clamp() {
if (count > 100) return;
count++;
mid = (low + high) / 2 | 0;
var _text = text.slice(0, mid);
_this2.refs.context.innerHTML = _text + ellipsis;
var contextHeight = _this2._getContextRect_().height;
var wrapHeight = _this2._getWrapRect_().height;
if (contextHeight > wrapHeight) {
high = mid - 1;
} else {
low = mid + 1;
}
if (low <= high) {
_this2.requestAnimationFrameHandler = _requestAnimationFrame_(clamp);
} else {
_this2.refs.context.innerHTML = _text.slice(0, mid - 1) + ellipsis;
typeof callback === 'function' && callback();
}
};
clamp();
}
}
}, {
key: 'componentDidMount',
value: function componentDidMount() {
var _this3 = this;
this.rawContextText = this.refs.context.innerText;
this.adjustContext();
if (this.autoAdjustInterval > 0) {
var prevWidthOfWrap = null;
var prevHeightOfWrap = null;
this.adjustIntervalHandler = setInterval(function () {
var widthOfWrap = _this3._getWrapRect_().width;
var heightOfWrap = _this3._getWrapRect_().height;
if (prevWidthOfWrap !== widthOfWrap || prevHeightOfWrap !== heightOfWrap) {
_this3.adjustContext(function () {
prevWidthOfWrap = widthOfWrap;
prevHeightOfWrap = heightOfWrap;
});
}
}, this.autoAdjustInterval);
}
}
}, {
key: 'componentWillUnmount',
value: function componentWillUnmount() {
clearInterval(this.adjustIntervalHandler);
_cancelAnimationFrame_(this.requestAnimationFrameHandler);
}
}, {
key: 'render',
value: function render() {
return _react2.default.createElement(
'div',
{ className: this.props.className, ref: 'wrap', style: this.props.style },
_react2.default.createElement(
'div',
{ ref: 'context', className: this.props.innerClassName, style: this.props.innerStyle,
dangerouslySetInnerHTML: this.props.dangerouslySetInnerHTML },
this.props.children
)
);
}
}]);
return Clamp;
}(_react2.default.Component);
exports.default = Clamp;