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add onDropText event to support text dropping #24

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+37 −16
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add onDropText event to support text dropping #24

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53 changes: 37 additions & 16 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,11 +32,21 @@ function dragDrop (elem, listeners) {
e.stopPropagation()
e.preventDefault()
if (e.dataTransfer.items) {
var items = toArray(e.dataTransfer.items)

// Only add "drag" class when `items` contains a file
var items = toArray(e.dataTransfer.items).filter(function (item) {
var fileItems = items.filter(function (item) {
return item.kind === 'file'
})
if (items.length === 0) return

// Otherwise add "drag" class if `onDropText` event is present and `items` contains a string
if (fileItems.length === 0 && !listeners.onDropText) return

var stringItem = items.find(function (item) {
return item.kind === 'string' && item.type === 'text/plain'
})

if (!stringItem) return
}

elem.classList.add('drag')
Expand Down Expand Up @@ -81,25 +91,36 @@ function dragDrop (elem, listeners) {
}

if (e.dataTransfer.items) {
var items = toArray(e.dataTransfer.items)

// Handle directories in Chrome using the proprietary FileSystem API
var items = toArray(e.dataTransfer.items).filter(function (item) {
var fileItems = items.filter(function (item) {
return item.kind === 'file'
})

if (items.length === 0) return

parallel(items.map(function (item) {
return function (cb) {
processEntry(item.webkitGetAsEntry(), cb)
}
}), function (err, results) {
// This catches permission errors with file:// in Chrome. This should never
// throw in production code, so the user does not need to use try-catch.
if (err) throw err
if (listeners.onDrop) {
listeners.onDrop(flatten(results), pos)
if (fileItems.length !== 0) {
parallel(fileItems.map(function (item) {
return function (cb) {
processEntry(item.webkitGetAsEntry(), cb)
}
}), function (err, results) {
// This catches permission errors with file:// in Chrome. This should never
// throw in production code, so the user does not need to use try-catch.
if (err) throw err
if (listeners.onDrop) {
listeners.onDrop(flatten(results), pos)
}
})
} else if (listeners.onDropText) {
// Handle text drop if `onDropText` event is present
var stringItem = items.find(function (item) {
return item.kind === 'string' && item.type === 'text/plain'
})

if (stringItem) {
stringItem.getAsString(function (text) { listeners.onDropText(text, pos) })
}
})
}
} else {
var files = toArray(e.dataTransfer.files)

Expand Down