office-ui-fabric-react
Version:
Reusable React components for building experiences for Office 365.
128 lines (126 loc) • 6.95 kB
JavaScript
"use strict";
var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
/* tslint:disable:no-unused-variable */
var React = require('react');
var BaseComponent_1 = require('../../common/BaseComponent');
var autobind_1 = require('../../utilities/autobind');
require('./DocumentCardTitle.scss');
var TRUNCATION_SEPARATOR = '…';
var TRUNCATION_MINIMUM_LENGTH = 40; // This is the length we know can fit into the min width of DocumentCard.
var TRUNCATION_MAXIMUM_LENGTH = 90 - TRUNCATION_SEPARATOR.length;
var TRUNCATION_FIRST_PIECE_LONGER_BY = 10;
var TRUNCATION_VERTICAL_OVERFLOW_THRESHOLD = 5;
var DocumentCardTitle = (function (_super) {
__extends(DocumentCardTitle, _super);
function DocumentCardTitle(props) {
_super.call(this, props);
this.state = {
truncatedTitleFirstPiece: '',
truncatedTitleSecondPiece: ''
};
}
DocumentCardTitle.prototype.componentDidMount = function () {
var _a = this.props, title = _a.title, shouldTruncate = _a.shouldTruncate;
if (shouldTruncate && title && title.length > TRUNCATION_MINIMUM_LENGTH) {
if (this._doesTitleOverflow()) {
this._startTruncation(this.props);
}
this._events.on(window, 'resize', this._updateTruncation);
}
};
DocumentCardTitle.prototype.componentWillReceiveProps = function (newProps) {
this._events.off(window, 'resize');
this._isTruncated = false;
if (newProps.shouldTruncate && newProps.title && newProps.title.length > TRUNCATION_MINIMUM_LENGTH) {
this._startTruncation(newProps);
this._events.on(window, 'resize', this._updateTruncation);
}
};
DocumentCardTitle.prototype.componentDidUpdate = function () {
// If we're truncating, make sure the title fits
if (this.props.shouldTruncate) {
this._shrinkTitle();
}
};
DocumentCardTitle.prototype.render = function () {
var _a = this.props, title = _a.title, shouldTruncate = _a.shouldTruncate;
var _b = this.state, truncatedTitleFirstPiece = _b.truncatedTitleFirstPiece, truncatedTitleSecondPiece = _b.truncatedTitleSecondPiece;
var documentCardTitle;
if (shouldTruncate && this._isTruncated) {
documentCardTitle = (React.createElement("div", {className: 'ms-DocumentCardTitle', ref: this._resolveRef('_titleElement'), title: title},
truncatedTitleFirstPiece,
"…",
truncatedTitleSecondPiece));
}
else {
documentCardTitle = (React.createElement("div", {className: 'ms-DocumentCardTitle', ref: this._resolveRef('_titleElement'), title: title}, title));
}
return documentCardTitle;
};
DocumentCardTitle.prototype._startTruncation = function (props) {
var originalTitle = props.title;
this._isTruncated = false;
// If the title is really short, there's no need to truncate it
if (originalTitle && originalTitle.length >= TRUNCATION_MINIMUM_LENGTH) {
// Break the text into two pieces for assembly later
if (originalTitle.length > TRUNCATION_MAXIMUM_LENGTH) {
// The text is really long, so we can take a chunk out of the middle so the two pieces combine for the maximum length
this._isTruncated = true;
this.setState({
truncatedTitleFirstPiece: originalTitle.slice(0, TRUNCATION_MAXIMUM_LENGTH / 2 + TRUNCATION_FIRST_PIECE_LONGER_BY),
truncatedTitleSecondPiece: originalTitle.slice(originalTitle.length - (TRUNCATION_MAXIMUM_LENGTH / 2 - TRUNCATION_FIRST_PIECE_LONGER_BY))
});
}
else {
// The text is not so long, so we'll just break it into two pieces
this.setState({
truncatedTitleFirstPiece: originalTitle.slice(0, Math.ceil(originalTitle.length / 2) + TRUNCATION_FIRST_PIECE_LONGER_BY),
truncatedTitleSecondPiece: originalTitle.slice(originalTitle.length - Math.floor(originalTitle.length / 2) + TRUNCATION_FIRST_PIECE_LONGER_BY)
});
}
}
// Save the width we just started truncation at, so that later we will only update truncation if necessary
this._truncatedTitleAtWidth = this._titleElement.clientWidth;
};
DocumentCardTitle.prototype._shrinkTitle = function () {
if (this._doesTitleOverflow()) {
var _a = this.state, truncatedTitleFirstPiece = _a.truncatedTitleFirstPiece, truncatedTitleSecondPiece = _a.truncatedTitleSecondPiece;
this._isTruncated = true;
if (!truncatedTitleFirstPiece && !truncatedTitleSecondPiece) {
this._startTruncation(this.props);
}
this.setState({
truncatedTitleFirstPiece: truncatedTitleFirstPiece.slice(0, truncatedTitleFirstPiece.length - 1),
truncatedTitleSecondPiece: truncatedTitleSecondPiece.slice(1)
});
}
};
DocumentCardTitle.prototype._doesTitleOverflow = function () {
var titleElement = this._titleElement;
return titleElement.scrollHeight > titleElement.clientHeight + TRUNCATION_VERTICAL_OVERFLOW_THRESHOLD || titleElement.scrollWidth > titleElement.clientWidth;
};
DocumentCardTitle.prototype._updateTruncation = function () {
// Only update truncation if the title's size has changed since the last time we truncated
if (this._titleElement.clientWidth !== this._truncatedTitleAtWidth) {
// Throttle truncation so that it doesn't happen during a window resize
clearTimeout(this._scrollTimerId);
this._scrollTimerId = this._async.setTimeout(this._startTruncation.bind(this, this.props), 250);
}
};
__decorate([
autobind_1.autobind
], DocumentCardTitle.prototype, "_startTruncation", null);
return DocumentCardTitle;
}(BaseComponent_1.BaseComponent));
exports.DocumentCardTitle = DocumentCardTitle;
//# sourceMappingURL=DocumentCardTitle.js.map