[REF] devtools: Better messages forwarding

This commit improves how messages are relayed from the page to the
devtools by using a specific port for each instance of the owl devtools
panel and refreshing it through the heartbeat message. This allows
to prevent sending messages to every devtools instances and sorting
the messages inside.

tools/devtools/src/background.js

@@ -5,7 +5,7 @@ let owlStatus = 0;
 const browserInstance = IS_FIREFOX ? browser : chrome;
 
 // Used to keep track of the tabs where the owl devtools have been opened
-const activePanels = new Set();
+const activePanels = new Map();
 
 // Load the devtools global hook this way when running on manifest v3 chrome
 if (!IS_FIREFOX) {
@@ -75,8 +75,23 @@ browserInstance.runtime.onMessage.addListener(async (message, sender, sendRespon
     return true;
   } else if (message.type === "owlStatus") {
     setOwlStatus(message.data);
-    // Dummy message to test if the extension context is still valid
+    // Refresh panel connection timeout
   } else if (message.type === "keepAlive") {
+    const panel = activePanels.get(message.id);
+    if (panel) {
+      clearTimeout(panel.expirationTimeout);
+      panel.expirationTimeout = setTimeout(() => {
+        activePanels.delete(message.id);
+        panel.port.disconnect();
+      }, 750);
+    } else {
+      const port = browserInstance.runtime.connect({ name: "OwlDevtoolsPort_" + message.id });
+      const expirationTimeout = setTimeout(() => {
+        activePanels.delete(message.id);
+        port.disconnect();
+      }, 750);
+      activePanels.set(message.id, { port: port, expirationTimeout: expirationTimeout });
+    }
     return;
     // Open the devtools documentation in a new tab
   } else if (message.type === "openDoc") {
@@ -87,10 +102,15 @@ browserInstance.runtime.onMessage.addListener(async (message, sender, sendRespon
       }
     );
     return;
-    // Relay the received message to the devtools app
+    // Register a new port for the devtools panel
   } else if (message.type === "newDevtoolsPanel") {
-    const tab = await getActiveTabURL();
+    const id = message.id;
-    activePanels.add(tab);
+    const port = browserInstance.runtime.connect({ name: "OwlDevtoolsPort_" + id });
+    const expirationTimeout = setTimeout(() => {
+      activePanels.delete(id);
+      port.disconnect();
+    }, 750);
+    activePanels.set(message.id, { port: port, expirationTimeout: expirationTimeout });
     // This is solely for firefox which doesnt allow access to the chrome.tabs api inside devtools
   } else if (message.type === "getActiveTabURL") {
     getActiveTabURL().then((tab) => {
@@ -98,15 +118,13 @@ browserInstance.runtime.onMessage.addListener(async (message, sender, sendRespon
     });
     return true;
   } else {
-    const tab = await getActiveTabURL();
+    const destinationPanel = activePanels.get(sender.tab.id);
-    if (!activePanels.has(tab)) {
+    if (destinationPanel) {
-      return;
+      destinationPanel.port.postMessage(
-    }
-    const port = browserInstance.runtime.connect({ name: "OwlDevtoolsPort" });
-    port.postMessage(
         message.data
           ? { type: message.type, data: message.data, origin: message.origin }
           : { type: message.type, origin: message.origin }
       );
     }
+  }
 });

tools/devtools/src/devtools_app/devtools.js

@@ -27,7 +27,6 @@ function createPanelsIfOwl() {
         "../../assets/icon128.png",
         IS_FIREFOX ? "devtools_panel.html" : "devtools_app/devtools_panel.html"
       );
-      browserInstance.runtime.sendMessage({ type: "newDevtoolsPanel" });
     }
   );
 }

tools/devtools/src/devtools_app/store/store.js

@@ -652,33 +652,28 @@ async function init() {
   }
 
   loadSettings();
-}
 
-// Heartbeat message to test whether the extension context is still valid or not
+  browserInstance.runtime.sendMessage({ type: "newDevtoolsPanel", id: store.devtoolsId });
-setInterval(() => {
+
+  // Heartbeat message to test whether the extension context is still valid or not
+  setInterval(() => {
     if (store.extensionContextStatus) {
       try {
-      browserInstance.runtime.sendMessage({ type: "keepAlive" });
+        browserInstance.runtime.sendMessage({ type: "keepAlive", id: store.devtoolsId });
       } catch (e) {
         store.extensionContextStatus = false;
       }
     }
-}, 1000);
+  }, 500);
+}
 
 let flushRendersTimeout = false;
 // Connect to the port to communicate to the background script
 browserInstance.runtime.onConnect.addListener((port) => {
-  if (!port.name === "OwlDevtoolsPort") {
+  if (port.name === "OwlDevtoolsPort_" + store.devtoolsId) {
-    return;
-  }
     port.onMessage.addListener(async (msg) => {
       // Reload the tree after checking if the scripts are loaded when this message is received
       if (msg.type === "Reload") {
-      const tab = await getTabURL();
-      // Since this message is sent to all devtools windows, only take it into account when this is the active tab
-      if (tab !== store.devtoolsId) {
-        return;
-      }
         store.owlStatus = await evalInWindow("window.__OWL__DEVTOOLS_GLOBAL_HOOK__ !== undefined;");
         if (store.owlStatus) {
           evalInWindow("__OWL__DEVTOOLS_GLOBAL_HOOK__.devtoolsId = " + store.devtoolsId + ";");
@@ -687,11 +682,6 @@ browserInstance.runtime.onConnect.addListener((port) => {
       }
       // Received when a frame has been delayed when loading the scripts due to owl being lazy loaded
       if (msg.type === "FrameReady") {
-      const tab = await getTabURL();
-      // Same as for the reload message
-      if (tab !== store.devtoolsId) {
-        return;
-      }
         store.updateIFrameList();
         store.owlStatus = true;
         store.resetData();
@@ -700,11 +690,6 @@ browserInstance.runtime.onConnect.addListener((port) => {
       if (msg.type === "RefreshApps") {
         store.loadComponentsTree(true);
       }
-    // Filter out the messages that are not destined to this devtools tab. The messages above may be sent before
-    // the devtoolsId is set
-    if (msg.origin.id !== store.devtoolsId) {
-      return;
-    }
       // When message of type Flush is received, overwrite the component tree with the new one from page
       // A flush message is sent everytime a component is rendered on the page
       if (msg.type === "Flush") {
@@ -749,6 +734,7 @@ browserInstance.runtime.onConnect.addListener((port) => {
         }
       }
     });
+  }
 });
 
 // Load all settings from the chrome sync storage

tools/devtools/src/page_scripts/owl_devtools_global_hook.js

@@ -17,8 +17,6 @@
       this.addedElements = [];
       // To keep track of the succession order of the render events
       this.eventId = 0;
-      // Will be reset as soon as a new devtools owl tab is opened. Allows to avoid sending messages to the wrong devtools tab later on
-      this.devtoolsId = 0;
       // Set to keep track of the frame on which this script is loaded
       this.frame = "top";
       // Allows to launch a message each time an iframe html element is added to the page
@@ -38,7 +36,6 @@
                   source: "owl-devtools",
                   type: "NewIFrame",
                   data: addedNode.contentDocument.location.href,
-                  origin: { id: self.devtoolsId },
                 });
               }
             }
@@ -263,7 +260,7 @@
               source: "owl-devtools",
               type: "Flush",
               data: path,
-              origin: { id: self.devtoolsId, frame: self.frame },
+              origin: { frame: self.frame },
             });
           }
         });
@@ -372,7 +369,6 @@
             source: "owl-devtools",
             type: "Event",
             data: self.eventsBatch,
-            origin: { id: self.devtoolsId },
           });
           self.eventsBatch = [];
         }
@@ -628,7 +624,6 @@
           source: "owl-devtools",
           type: "SelectElement",
           data: path,
-          origin: { id: this.devtoolsId },
         });
       }
     };
@@ -656,7 +651,6 @@
       window.top.postMessage({
         source: "owl-devtools",
         type: "StopSelector",
-        origin: { id: this.devtoolsId },
       });
     };
 
@@ -1767,6 +1761,6 @@
     false
   );
   checkOwlStatus();
-  // Indicates whether the scripts loaded successfully or not (useful when loaded with eval in iframes only)
+  // Indicates whether the scripts loaded successfully or not (only useful when loaded with eval in iframes)
   return window.__OWL__DEVTOOLS_GLOBAL_HOOK__ !== undefined;
 })();