Handle standard pasteboard keybindings in the dev tools

This commit adds a boolean constructor parameter to the AtomCefClient indicating whether it should handle the standard pasteboard commands for its associated browser. We pass `true` when constructing the client for the dev tools, so these commands work there.

native/atom_cef_client.cpp

@@ -15,6 +15,10 @@
 AtomCefClient::AtomCefClient(){
 }
 
+AtomCefClient::AtomCefClient(bool handlePasteboardCommands) {
+  m_HandlePasteboardCommands = handlePasteboardCommands;
+}
+
 AtomCefClient::~AtomCefClient() {
 }
 
@@ -105,6 +109,15 @@ bool AtomCefClient::OnKeyEvent(CefRefPtr<CefBrowser> browser,
   if (event.modifiers == KEY_META && event.unmodified_character == 'r') {
     browser->SendProcessMessage(PID_RENDERER, CefProcessMessage::Create("reload"));
   }
+  if (m_HandlePasteboardCommands && event.modifiers == KEY_META && event.unmodified_character == 'x') {
+    browser->GetFocusedFrame()->Cut();
+  }
+  if (m_HandlePasteboardCommands && event.modifiers == KEY_META && event.unmodified_character == 'c') {
+    browser->GetFocusedFrame()->Copy();
+  }
+  if (m_HandlePasteboardCommands && event.modifiers == KEY_META && event.unmodified_character == 'v') {
+    browser->GetFocusedFrame()->Paste();
+  }
   else if (event.modifiers == (KEY_META | KEY_ALT) && event.unmodified_character == 'i') {
     ToggleDevTools(browser);
   } else if (event.modifiers == KEY_META && event.unmodified_character == '`') {

native/atom_cef_client.h

@@ -16,9 +16,9 @@ class AtomCefClient : public CefClient,
                       public CefRequestHandler {
  public:
   AtomCefClient();
+  AtomCefClient(bool handlePasteboardCommands);
   virtual ~AtomCefClient();
 
-
   CefRefPtr<CefBrowser> GetBrowser() { return m_Browser; }
 
   virtual CefRefPtr<CefContextMenuHandler> GetContextMenuHandler() OVERRIDE {
@@ -97,6 +97,7 @@ class AtomCefClient : public CefClient,
 
  protected:
   CefRefPtr<CefBrowser> m_Browser;
+  bool m_HandlePasteboardCommands = false;
 
   void FocusNextWindow();
   void Open(std::string path);

native/atom_window_controller.mm

@@ -131,7 +131,7 @@
 // devtools don't resize properly.
 // HACK: I hate this and want to place this code directly in showDevTools
 - (void)attachDevTools {
-  _cefDevToolsClient = new AtomCefClient();
+  _cefDevToolsClient = new AtomCefClient(true);
   std::string devtools_url = _cefClient->GetBrowser()->GetHost()->GetDevToolsURL(true);
   [self addBrowserToView:_devToolsView url:devtools_url.c_str() cefHandler:_cefDevToolsClient];
 }