import { drawSelectionCursor } from "../display/selection.js"
import { operation } from "../display/operations.js"
import { clipPos } from "../line/pos.js"
import { posFromMouse } from "../measurement/position_measurement.js"
import { eventInWidget } from "../measurement/widgets.js"
import { makeChange, replaceRange } from "../model/changes.js"
import { changeEnd } from "../model/change_measurement.js"
import { simpleSelection } from "../model/selection.js"
import { setSelectionNoUndo, setSelectionReplaceHistory } from "../model/selection_updates.js"
import { ie, presto, safari } from "../util/browser.js"
import { elt, removeChildrenAndAdd } from "../util/dom.js"
import { e_preventDefault, e_stop, signalDOMEvent } from "../util/event.js"
import { indexOf } from "../util/misc.js"
// Kludge to work around strange IE behavior where it'll sometimes
// re-fire a series of drag-related events right after the drop (#1551)
let lastDrop = 0
export function onDrop(e) {
let cm = this
clearDragCursor(cm)
if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
return
e_preventDefault(e)
if (ie) lastDrop = +new Date
let pos = posFromMouse(cm, e, true), files = e.dataTransfer.files
if (!pos || cm.isReadOnly()) return
// Might be a file drop, in which case we simply extract the text
// and insert it.
if (files && files.length && window.FileReader && window.File) {
let n = files.length, text = Array(n), read = 0
const markAsReadAndPasteIfAllFilesAreRead = () => {
if (++read == n) {
operation(cm, () => {
pos = clipPos(cm.doc, pos)
let change = {from: pos, to: pos,
text: cm.doc.splitLines(
text.filter(t => t != null).join(cm.doc.lineSeparator())),
origin: "paste"}
makeChange(cm.doc, change)
setSelectionReplaceHistory(cm.doc, simpleSelection(clipPos(cm.doc, pos), clipPos(cm.doc, changeEnd(change))))
})()
}
}
const readTextFromFile = (file, i) => {
if (cm.options.allowDropFileTypes &&
indexOf(cm.options.allowDropFileTypes, file.type) == -1) {
markAsReadAndPasteIfAllFilesAreRead()
return
}
let reader = new FileReader
reader.onerror = () => markAsReadAndPasteIfAllFilesAreRead()
reader.onload = () => {
let content = reader.result
if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) {
markAsReadAndPasteIfAllFilesAreRead()
return
}
text[i] = content
markAsReadAndPasteIfAllFilesAreRead()
}
reader.readAsText(file)
}
for (let i = 0; i < files.length; i++) readTextFromFile(files[i], i)
} else { // Normal drop
// Don't do a replace if the drop happened inside of the selected text.
if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
cm.state.draggingText(e)
// Ensure the editor is re-focused
setTimeout(() => cm.display.input.focus(), 20)
return
}
try {
let text = e.dataTransfer.getData("Text")
if (text) {
let selected
if (cm.state.draggingText && !cm.state.draggingText.copy)
selected = cm.listSelections()
setSelectionNoUndo(cm.doc, simpleSelection(pos, pos))
if (selected) for (let i = 0; i < selected.length; ++i)
replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag")
cm.replaceSelection(text, "around", "paste")
cm.display.input.focus()
}
}
catch(e){}
}
}
export function onDragStart(cm, e) {
if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return
e.dataTransfer.setData("Text", cm.getSelection())
e.dataTransfer.effectAllowed = "copyMove"
// Use dummy image instead of default browsers image.
// Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
if (e.dataTransfer.setDragImage && !safari) {
let img = elt("img", null, null, "position: fixed; left: 0; top: 0;")
img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
if (presto) {
img.width = img.height = 1
cm.display.wrapper.appendChild(img)
// Force a relayout, or Opera won't use our image for some obscure reason
img._top = img.offsetTop
}
e.dataTransfer.setDragImage(img, 0, 0)
if (presto) img.parentNode.removeChild(img)
}
}
export function onDragOver(cm, e) {
let pos = posFromMouse(cm, e)
if (!pos) return
let frag = document.createDocumentFragment()
drawSelectionCursor(cm, pos, frag)
if (!cm.display.dragCursor) {
cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors")
cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv)
}
removeChildrenAndAdd(cm.display.dragCursor, frag)
}
export function clearDragCursor(cm) {
if (cm.display.dragCursor) {
cm.display.lineSpace.removeChild(cm.display.dragCursor)
cm.display.dragCursor = null
}
}
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