Merge pull request #4240 from atom/ks-write-text-async-to-selection-clipboard

Write text async to selection clipboard

spec/text-editor-component-spec.coffee

@@ -2686,6 +2686,10 @@ describe "TextEditorComponent", ->
 
   describe "middle mouse paste on Linux", ->
     it "pastes the previously selected text", ->
+      spyOn(require('ipc'), 'send').andCallFake (eventName, selectedText) ->
+        if eventName is 'write-text-to-selection-clipboard'
+          require('clipboard').writeText(selectedText, 'selection')
+
       atom.clipboard.write('')
       component.listenForMiddleMousePaste()
 

src/browser/atom-application.coffee

@@ -238,6 +238,11 @@ class AtomApplication
       win = BrowserWindow.fromWebContents(event.sender)
       win[method](args...)
 
+    clipboard = null
+    ipc.on 'write-text-to-selection-clipboard', (event, selectedText) ->
+      clipboard ?= require 'clipboard'
+      clipboard.writeText(selectedText, 'selection')
+
   # Public: Executes the given command.
   #
   # If it isn't handled globally, delegate to the currently focused window.

src/text-editor-component.coffee

@@ -6,6 +6,7 @@ scrollbarStyle = require 'scrollbar-style'
 {Range, Point} = require 'text-buffer'
 grim = require 'grim'
 {CompositeDisposable} = require 'event-kit'
+ipc = require 'ipc'
 
 GutterComponent = require './gutter-component'
 InputComponent = require './input-component'
@@ -444,7 +445,10 @@ TextEditorComponent = React.createClass
 
     @subscribe @props.editor.onDidChangeSelectionRange =>
       if selectedText = @props.editor.getSelectedText()
-        clipboard.writeText(selectedText, 'selection')
+        # This uses ipc.send instead of clipboard.writeText because
+        # clipboard.writeText is a sync ipc call on Linux and that
+        # will slow down selections.
+        ipc.send('write-text-to-selection-clipboard', selectedText)
 
   observeConfig: ->
     @subscribe atom.config.observe 'editor.useHardwareAcceleration', @setUseHardwareAcceleration