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1 import { drawSelectionCursor } from "../display/selection.js"
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2 import { operation } from "../display/operations.js"
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3 import { clipPos } from "../line/pos.js"
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4 import { posFromMouse } from "../measurement/position_measurement.js"
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5 import { eventInWidget } from "../measurement/widgets.js"
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6 import { makeChange, replaceRange } from "../model/changes.js"
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7 import { changeEnd } from "../model/change_measurement.js"
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8 import { simpleSelection } from "../model/selection.js"
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9 import { setSelectionNoUndo, setSelectionReplaceHistory } from "../model/selection_updates.js"
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10 import { ie, presto, safari } from "../util/browser.js"
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11 import { elt, removeChildrenAndAdd } from "../util/dom.js"
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12 import { e_preventDefault, e_stop, signalDOMEvent } from "../util/event.js"
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13 import { indexOf } from "../util/misc.js"
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14
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15 // Kludge to work around strange IE behavior where it'll sometimes
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16 // re-fire a series of drag-related events right after the drop (#1551)
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17 let lastDrop = 0
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18
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19 export function onDrop(e) {
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20 let cm = this
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21 clearDragCursor(cm)
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22 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
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23 return
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24 e_preventDefault(e)
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25 if (ie) lastDrop = +new Date
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26 let pos = posFromMouse(cm, e, true), files = e.dataTransfer.files
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27 if (!pos || cm.isReadOnly()) return
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28 // Might be a file drop, in which case we simply extract the text
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29 // and insert it.
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30 if (files && files.length && window.FileReader && window.File) {
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31 let n = files.length, text = Array(n), read = 0
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32 const markAsReadAndPasteIfAllFilesAreRead = () => {
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33 if (++read == n) {
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34 operation(cm, () => {
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35 pos = clipPos(cm.doc, pos)
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36 let change = {from: pos, to: pos,
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37 text: cm.doc.splitLines(
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38 text.filter(t => t != null).join(cm.doc.lineSeparator())),
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39 origin: "paste"}
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40 makeChange(cm.doc, change)
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41 setSelectionReplaceHistory(cm.doc, simpleSelection(clipPos(cm.doc, pos), clipPos(cm.doc, changeEnd(change))))
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42 })()
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43 }
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44 }
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45 const readTextFromFile = (file, i) => {
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46 if (cm.options.allowDropFileTypes &&
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47 indexOf(cm.options.allowDropFileTypes, file.type) == -1) {
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48 markAsReadAndPasteIfAllFilesAreRead()
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49 return
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50 }
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51 let reader = new FileReader
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52 reader.onerror = () => markAsReadAndPasteIfAllFilesAreRead()
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53 reader.onload = () => {
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54 let content = reader.result
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55 if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) {
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56 markAsReadAndPasteIfAllFilesAreRead()
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57 return
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58 }
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59 text[i] = content
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60 markAsReadAndPasteIfAllFilesAreRead()
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61 }
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62 reader.readAsText(file)
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63 }
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64 for (let i = 0; i < files.length; i++) readTextFromFile(files[i], i)
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65 } else { // Normal drop
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66 // Don't do a replace if the drop happened inside of the selected text.
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67 if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
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68 cm.state.draggingText(e)
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69 // Ensure the editor is re-focused
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70 setTimeout(() => cm.display.input.focus(), 20)
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71 return
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72 }
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73 try {
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74 let text = e.dataTransfer.getData("Text")
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75 if (text) {
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76 let selected
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77 if (cm.state.draggingText && !cm.state.draggingText.copy)
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78 selected = cm.listSelections()
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79 setSelectionNoUndo(cm.doc, simpleSelection(pos, pos))
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80 if (selected) for (let i = 0; i < selected.length; ++i)
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81 replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag")
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82 cm.replaceSelection(text, "around", "paste")
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83 cm.display.input.focus()
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84 }
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85 }
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86 catch(e){}
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87 }
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88 }
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89
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90 export function onDragStart(cm, e) {
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91 if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
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92 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return
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93
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94 e.dataTransfer.setData("Text", cm.getSelection())
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95 e.dataTransfer.effectAllowed = "copyMove"
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96
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97 // Use dummy image instead of default browsers image.
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98 // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
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99 if (e.dataTransfer.setDragImage && !safari) {
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100 let img = elt("img", null, null, "position: fixed; left: 0; top: 0;")
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101 img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
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102 if (presto) {
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103 img.width = img.height = 1
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104 cm.display.wrapper.appendChild(img)
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105 // Force a relayout, or Opera won't use our image for some obscure reason
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106 img._top = img.offsetTop
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107 }
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108 e.dataTransfer.setDragImage(img, 0, 0)
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109 if (presto) img.parentNode.removeChild(img)
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110 }
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111 }
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112
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113 export function onDragOver(cm, e) {
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114 let pos = posFromMouse(cm, e)
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115 if (!pos) return
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116 let frag = document.createDocumentFragment()
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117 drawSelectionCursor(cm, pos, frag)
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118 if (!cm.display.dragCursor) {
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119 cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors")
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120 cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv)
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121 }
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122 removeChildrenAndAdd(cm.display.dragCursor, frag)
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123 }
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124
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125 export function clearDragCursor(cm) {
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126 if (cm.display.dragCursor) {
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127 cm.display.lineSpace.removeChild(cm.display.dragCursor)
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128 cm.display.dragCursor = null
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129 }
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130 }
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