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Research: Drag and Drop from Finder

Raymond Lim edited this page · 3 revisions
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Overview

Mac does not provide a set of simple APIs to handle dropping files from Finder. So we need to find a solution either by updating CEF and/or implementing our own handling of drag-and-drop events. We need to handle at least two main events.

  • OnDragEnter event -- need this event to get the file paths of all the dragged files and folders.
  • OnDrop -- need this event to open all the dropped files.

Findings

  • We need CefDragHandler introduced in CEF version 3.1453.1279 so that we can get the file paths of the dragged files and folders.
  • We can use onDrop event in JavaScript to trigger the opening of the dropped files.
  • Although we already have native shell implementation of drag-and-drop from Windows Explorer, it is also preventing us from enabling drag-and-drop in CodeMirror (ie. dragging text within the document). By switching to onDrop event in JavaScript we can also enable drag-and-drop of text inside a document.

Prototype

We have a prototype in Glenn/drag-and-drop branch, but you need to make the following changes before you can test.

  • Download CEF version 3.1453.1279 from http://cefbuilds.com/. Make sure you get it from branch 1453.
  • Open Gruntfile.js in your brackets-shell repo and update the cef version to 3.1453.1279 (on line 186).
  • Delete any intermediate folders that has version number in its name under your deps folder.
  • Run grunt from command line in your brackets-shell root folder.
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