make electron application/windows singleton

Author: hexaeder

NetworkDynamicsInspector/assets/app.css

@@ -57,9 +57,9 @@ body {
 }
 
 .graphplot-card {
-    height:400px; /* initial widht and height */
-    width: 400px;
-    min-width:250px;
+    height:350px; /* initial widht and height */
+    width: 350px;
+    min-width:200px;
     resize: both;
     overflow: hidden;
 }

NetworkDynamicsInspector/ext/ElectronExt.jl

@@ -1,15 +1,75 @@
 module ElectronExt
 
 using NetworkDynamicsInspector: NetworkDynamicsInspector as NDI
-using Electron: Electron
-using Bonito: Bonito
+using Electron: Electron, windows
+using Bonito: Bonito, HTTPServer
 
-function NDI.display_electron_app()
+const ELECTRON_APP = Ref{Any}(nothing)
+
+function NDI.display_electron_app(restart)
+    restart && close_windows()
     webapp = NDI.get_webapp()
-    # disp = Bonito.use_electron_display()
-    disp = Bonito.use_electron_display(devtools = true)
+    disp = get_electron_display()
     display(disp, webapp)
     nothing
 end
 
+function get_electron_display()
+    window = get_electron_window()
+    disp = HTTPServer.ElectronDisplay(window, HTTPServer.BrowserDisplay(; open_browser=false))
+end
+
+function get_electron_window()
+    app = get_electron_app()
+
+    any(w -> !w.exists, windows(app)) && @warn "App contains reference to nonexistent window(s)"
+
+    window = if isempty(windows(app))
+        opts = Dict(:width => 1200, :height => 800)
+        Electron.Window(app, opts)
+    else
+        length(windows(app)) != 1 && @warn "App contains multiple windows"
+        first(windows(app))
+    end
+    return window
+end
+haswindow() = hasapp() && !isempty(windows(ELECTRON_APP[]))
+
+function get_electron_app()
+    if !hasapp()
+        ELECTRON_APP[] = Electron.Application(;
+            additional_electron_args=[
+                "--disable-logging",
+                "--no-sandbox",
+                "--user-data-dir=$(mktempdir())",
+                "--disable-features=AccessibilityObjectModel",
+            ],
+        )
+    end
+    ELECTRON_APP[]
+end
+hasapp() = !isnothing(ELECTRON_APP[]) && ELECTRON_APP[].exists
+
+function close_windows()
+    if haswindow()
+        @info "Close existing Windows"
+        close.(windows(ELECTRON_APP[]))
+    end
+end
+
+function close_application()
+    if hasapp()
+        @info "Close Electron Application"
+        close(ELECTRON_APP[])
+    end
+end
+
+function NDI.toggle_devtools()
+    if haswindow()
+        Electron.toggle_devtools(get_electron_window())
+    else
+        error("No window to toggle devtools!")
+    end
+end
+
 end

NetworkDynamicsInspector/src/NetworkDynamicsInspector.jl

@@ -156,11 +156,11 @@ function start_server!(restart=true)
     @info "Visit $url:$port to launch App"
 end
 
-function start_electron()
+function _display_electron_app(restart)
     if isempty(methods(display_electron_app))
         @error "Electron.jl not available. Please install Electron.jl and `using Electron` before calling this function."
     else
-        display_electron_app()
+        display_electron_app(restart)
     end
 end
 function display_electron_app end
@@ -253,7 +253,7 @@ function inspect(sol; restart=false, reset=false, electron=false)
     end
 
     if electron
-        start_electron()
+        _display_electron_app(restart)
     else
         if !server_running()
             start_server!()

NetworkDynamicsInspector/src/utils.jl

@@ -142,3 +142,6 @@ function download_assets()
         download(url, joinpath(ASSETS, name))
     end
 end
+
+# function extended by ElectronExt
+function toggle_devtools end