Initial Commit

experiment/DomContentScript/implementation.js

@@ -0,0 +1,80 @@
+
+
+var { AppConstants } = ChromeUtils.importESModule("resource://gre/modules/AppConstants.sys.mjs");
+var DomContent_ESM = parseInt(AppConstants.MOZ_APP_VERSION, 10) >= 128;
+
+var { ExtensionCommon } = ChromeUtils.importESModule(
+  "resource://gre/modules/ExtensionCommon.sys.mjs"
+);
+
+var { ExtensionUtils } = DomContent_ESM
+  ? ChromeUtils.importESModule("resource://gre/modules/ExtensionUtils.sys.mjs")
+  : ChromeUtils.import("resource://gre/modules/ExtensionUtils.jsm");
+
+var { ExtensionError } = ExtensionUtils;
+
+var registeredWindows = new Map();
+
+var DomContentScript = class extends ExtensionCommon.ExtensionAPI {
+  constructor(extension) {
+    super(extension);
+    
+    this._windowListener = {
+      // nsIWindowMediatorListener functions
+      onOpenWindow(appWindow) {
+        // A new window has opened.
+        let domWindow = appWindow.docShell.domWindow;
+
+        /**
+         * Set up listeners to run the callbacks on the given window.
+         *
+         * @param aWindow {nsIDOMWindow}  The window to set up.
+         * @param aID {String} Optional.  ID of the new caller that has registered right now.
+         */
+        domWindow.addEventListener(
+          "DOMContentLoaded",
+          function() {
+            // do stuff
+            let windowChromeURL = domWindow.document.location.href;
+            if (registeredWindows.has(windowChromeURL)) {
+              let jsPath = registeredWindows.get(windowChromeURL);
+              Services.scriptloader.loadSubScript(jsPath, domWindow, "UTF-8");
+            }
+          },
+          { once: true }
+        );
+      },
+
+      onCloseWindow(appWindow) {
+        // One of the windows has closed.
+        let domWindow = appWindow.docShell.domWindow; // we don't need to do anything (script only loads once)
+      },
+    };
+   
+    Services.wm.addListener(this._windowListener);
+   
+  }
+  
+
+
+
+  
+  onShutdown(isAppShutdown) {
+    if (isAppShutdown) {
+      return; // the application gets unloaded anyway
+    }
+    Services.wm.removeListener(this._windowListener);
+  } 
+  
+  getAPI(context) {
+    /** API IMPLEMENTATION **/
+    return {
+      DomContentScript: {
+        // only returns something, if a user pref value is set
+        registerWindow: async function (windowUrl,jsPath) {
+          registeredWindows.set(windowUrl,jsPath);
+        }
+      },
+    };
+  }
+};