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index.js
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index.js
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var React = require('react');
var Dropzone = React.createClass({
displayName: 'Dropzone',
getDefaultProps: function() {
return {
supportClick: true,
multiple: true
};
},
getInitialState: function() {
return {
isDragActive: false
};
},
propTypes: {
onDrop: React.PropTypes.func.isRequired,
onDragOver: React.PropTypes.func,
onDragLeave: React.PropTypes.func,
size: React.PropTypes.number,
width: React.PropTypes.number,
height: React.PropTypes.number,
style: React.PropTypes.object,
supportClick: React.PropTypes.bool,
accept: React.PropTypes.string,
multiple: React.PropTypes.bool,
activeClassName: React.PropTypes.string
},
onDragLeave: function(e) {
this.setState({
isDragActive: false
});
if (this.props.onDragLeave) {
this.props.onDragLeave(e);
}
},
onDragOver: function(e) {
e.preventDefault();
e.stopPropagation();
e.dataTransfer.dropEffect = 'copy';
// set active drag state only when file is dragged into
// (in mozilla when file is dragged effect is "uninitialized")
var effectAllowed = e.dataTransfer.effectAllowed;
if (effectAllowed === 'all' || effectAllowed === 'uninitialized') {
this.setState({
isDragActive: true
});
}
if (this.props.onDragOver) {
this.props.onDragOver(e);
}
},
onDrop: function(e) {
e.preventDefault();
this.setState({
isDragActive: false
});
var files;
if (e.dataTransfer) {
files = e.dataTransfer.files;
} else if (e.target) {
files = e.target.files;
}
var maxFiles = (this.props.multiple) ? files.length : 1;
for (var i = 0; i < maxFiles; i++) {
files[i].preview = URL.createObjectURL(files[i]);
}
if (this.props.onDrop) {
files = Array.prototype.slice.call(files, 0, maxFiles);
this.props.onDrop(files, e);
}
},
onClick: function () {
if (this.props.supportClick === true) {
this.open();
}
},
open: function() {
var fileInput = React.findDOMNode(this.refs.fileInput);
fileInput.value = null;
fileInput.click();
},
render: function() {
var className = this.props.className || 'dropzone';
if (this.state.isDragActive) {
className += this.props.activeClassName || ' active';
}
var style = {};
if (this.props.style) { // user-defined inline styles take priority
style = this.props.style;
} else if (!this.props.className) { // if no class or inline styles defined, use defaults
style = {
width: this.props.width || this.props.size || 100,
height: this.props.height || this.props.size || 100,
borderStyle: this.state.isDragActive ? 'solid' : 'dashed'
};
}
return (
React.createElement('div',
{
className: className,
style: style,
onClick: this.onClick,
onDragLeave: this.onDragLeave,
onDragOver: this.onDragOver,
onDrop: this.onDrop
},
React.createElement('input',
{
style: { display: 'none' },
type: 'file',
multiple: this.props.multiple,
ref: 'fileInput',
onChange: this.onDrop,
accept: this.props.accept
}
),
this.props.children
)
);
}
});
module.exports = Dropzone;