Fix #471, enable opening a file by drag-dropping it onto Oni (#472)

* enable opening a file by drag-dropping a file onto Oni

* handle multiple files dropped at once and handle potential windows wackiness

* keep behavior consistent regardless of if a single file or multiple files are provided

browser/src/Editor/NeovimEditor.tsx

@@ -287,6 +287,22 @@ export class NeovimEditor implements IEditor {
  this._neovimInstance.command("exec \":normal! " + message + "\"")
  }
  })
+
+ // enable opening a file via drag-drop
+ document.ondragover = (ev) => {
+ ev.preventDefault()
+ }
+ document.body.ondrop = (ev) => {
+ ev.preventDefault()
+
+ let files = ev.dataTransfer.files
+ // open first file in current editor
+ this._neovimInstance.open(files[0].path.split("\\").join("/"))
+ // open any subsequent files in new tabs
+ for (let i = 1; i < files.length; i++) {
+ this._neovimInstance.command("exec \":tabe " + files.item(i).path.split("\\").join("/") + "\"")
+ }
+ }
  }
 
  public init(filesToOpen: string[]): void {