Which function is called when an app is selected in AppDisplay by hitting the return key?

[Bazon Bloch <bazonbloch arcor de>]

Hello,

ABSTRACT:

Which function is called when an app is selected in the AppDisplay by 
hitting the return/enter key?
It seems to make a difference whether the app is activated by mouse 
click or return key. I got the function for the mouse click, but I'm 
looking for the return key function.



DETAILED QUESTION:

The reason why I am asking: The following user request for my "Workspace 
Separation On Dash" Extension 
(https://extensions.gnome.org/extension/440/workspace-separation-on-dash/):

calebtom87 wrote:
"I don't know if this is more of a feature request or a bug report: It 
works great for clicking icons. It even works when I type in what I want 
and then click the icon, but if I hit enter to launch my program it will 
still switch work spaces. "


I prevent that workspace change by a modified version of the _onActivate 
function in /usr/share/gnome-shell/js/ui/appDisplay.js, originally only 
in order to prevent Workspace-Change by Dash-Clicks.

For reference, here is my modified version of that function:

/**
 * Modified version of the function in 
/usr/share/gnome-shell/js/ui/appDisplay.js
 */
function  _onActivate(event) {

    // Added: First check, whether the application is running on the 
current workspace
    let windows = this.app.get_windows();
    let activeWorkspace = global.screen.get_active_workspace();
    let isoncurrentworkspace=0;

    for (let i = 0; i < windows.length; i++) {
            if (windows[i].get_workspace() == activeWorkspace) {
        isoncurrentworkspace=1;
            }
        }

    //original function again:
        this.emit('launching');
        let modifiers = event.get_state();

        if (this._onActivateOverride) {
            this._onActivateOverride(event);
        } else {
            if (modifiers & Clutter.ModifierType.CONTROL_MASK
                && this.app.state == Shell.AppState.RUNNING) {
                this.app.open_new_window(-1);
            } else {
        // edited from original here: If not on current workspace, 
launch a new instance
        if (isoncurrentworkspace) {
                    this.app.activate();
        } else {
            this.app.open_new_window(-1);
        }
            }
        }
        Main.overview.hide();
    }


So how can I have the same effect, also for selecting an app by hitting 
the return key?
I searched, by had no success in finding the corresponding function.

thanks,
Bazon