forked from silverwind/uppie
/
uppie.js
147 lines (140 loc) · 4.73 KB
/
uppie.js
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/*! uppie v1.0.3 | (c) silverwind | BSD license */
(function(m) {
if (typeof exports === "object" && typeof module === "object")
module.exports = m();
else if (typeof define === "function" && define.amd)
return define([], m);
else
this.Uppie = m();
})(function() {
"use strict";
return function Uppie() {
return function(node, cb) {
if (node instanceof NodeList) {
[].slice.call(node).forEach(function(n) {
watch(n, cb);
});
} else {
watch(node, cb);
}
};
};
function watch(node, cb) {
if (node.tagName.toLowerCase() === "input" && node.type === "file") {
node.addEventListener("change", function(event) {
var t = event.target;
if (t.files && t.files.length) {
arrayApi(t, cb.bind(null, event));
} else if ("getFilesAndDirectories" in t) {
newDirectoryApi(t, cb.bind(null, event));
} else {
cb(event);
}
});
} else {
var stop = function(event) { event.preventDefault(); };
node.addEventListener("dragover", stop);
node.addEventListener("dragenter", stop);
node.addEventListener("drop", function(event) {
event.preventDefault();
var dt = event.dataTransfer;
if (dt.items && dt.items.length && "webkitGetAsEntry" in dt.items[0]) {
entriesApi(dt.items, cb.bind(null, event));
} else if ("getFilesAndDirectories" in dt) {
newDirectoryApi(dt, cb.bind(null, event));
} else if (dt.files) {
arrayApi(dt, cb.bind(null, event));
} else cb();
});
}
}
// API implemented in Firefox 42+ and Edge
function newDirectoryApi(input, cb) {
var fd = new FormData(), files = [];
var iterate = function(entries, path, resolve) {
var promises = [];
entries.forEach(function(entry) {
promises.push(new Promise(function(resolve) {
if ("getFilesAndDirectories" in entry) {
entry.getFilesAndDirectories().then(function(entries) {
iterate(entries, entry.path + "/", resolve);
});
} else {
if (entry.name) {
var p = (path + entry.name).replace(/^[/\\]/, "");
fd.append("files[]", entry, p);
files.push(p);
}
resolve();
}
}));
});
Promise.all(promises).then(resolve);
};
input.getFilesAndDirectories().then(function(entries) {
new Promise(function(resolve) {
iterate(entries, "/", resolve);
}).then(cb.bind(null, fd, files));
});
}
// old prefixed API implemented in Chrome 11+ as well as array fallback
function arrayApi(input, cb) {
var fd = new FormData(), files = [];
[].slice.call(input.files).forEach(function(file) {
fd.append("files[]", file, file.webkitRelativePath || file.name);
files.push(file.webkitRelativePath || file.name);
});
cb(fd, files);
}
// old drag and drop API implemented in Chrome 11+
function entriesApi(items, cb) {
var fd = new FormData(), files = [], rootPromises = [];
function readEntries(entry, reader, oldEntries, cb) {
var dirReader = reader || entry.createReader();
dirReader.readEntries(function(entries) {
var newEntries = oldEntries ? oldEntries.concat(entries) : entries;
if (entries.length) {
setTimeout(readEntries.bind(null, entry, dirReader, newEntries, cb), 0);
} else {
cb(newEntries);
}
});
}
function readDirectory(entry, path, resolve) {
if (!path) path = entry.name;
readEntries(entry, 0, 0, function(entries) {
var promises = [];
entries.forEach(function(entry) {
promises.push(new Promise(function(resolve) {
if (entry.isFile) {
entry.file(function(file) {
var p = path + "/" + file.name;
fd.append("files[]", file, p);
files.push(p);
resolve();
}, resolve.bind());
} else readDirectory(entry, path + "/" + entry.name, resolve);
}));
});
Promise.all(promises).then(resolve.bind());
});
}
[].slice.call(items).forEach(function(entry) {
entry = entry.webkitGetAsEntry();
if (entry) {
rootPromises.push(new Promise(function(resolve) {
if (entry.isFile) {
entry.file(function(file) {
fd.append("files[]", file, file.name);
files.push(file.name);
resolve();
}, resolve.bind());
} else if (entry.isDirectory) {
readDirectory(entry, null, resolve);
}
}));
}
});
Promise.all(rootPromises).then(cb.bind(null, fd, files));
}
});