extension: some 'cosmetic' preparations for manifest v3

tested on chromium/firefox stable

extension/src/js/background.js

@@ -65,31 +65,49 @@ async function makeCaptureRequest(
 // TODO FIXME ugh. need defensive error handling on the very top...
 function capture(comment: ?string = null, tag_str: ?string = null) {
     chrome.tabs.query({currentWindow: true, active: true }, tabs => {
-        const tab = tabs[0];
+        const tab = tabs[0]
         if (tab.url == null) {
-            showNotification('ERROR: trying to capture null');
-            return;
+            showNotification('ERROR: trying to capture null')
+            return
         }
-        const url: string = tab.url;
-        const title: ?string = tab.title;
+        const url: string = tab.url
+        const title: ?string = tab.title
 
-        get_options(opts => {
-            // console.log('action!');
-            // ugh.. https://stackoverflow.com/a/19165930/706389
-            chrome.tabs.executeScript( {
-                code: "window.getSelection().toString();"
-            }, selections => {
-                const selection = selections == null ? null : selections[0];
-                makeCaptureRequest({
+
+        const payload = (selection: ?string) => {
+            return {
                 url: url,
                 title: title,
                 selection: selection,
                 comment: comment,
                 tag_str: tag_str,
-                }, opts);
-            });
-        });
-    });
+            }
+        }
+
+        // TODO await properly and handle errors
+        const has_scripting = 'scripting' in chrome
+
+        get_options(opts => {
+            if (has_scripting) {
+                // $FlowFixMe
+                chrome.scripting.executeScript({
+                    target: {tabId: tab.id},
+                    func: () => window.getSelection().toString()
+                }, results => {
+                    const [res] = results // should only inject in one frame, so just one result
+                    const selection = res.result
+                    makeCaptureRequest(payload(selection), opts)
+                })
+            } else {
+                chrome.tabs.executeScript( {
+                    code: "window.getSelection().toString();"
+                }, selections => {
+                    const selection = selections == null ? null : selections[0]
+                    makeCaptureRequest(payload(selection), opts)
+                })
+            }
+        })
+    })
 }
 
 

extension/src/manifest.json

@@ -8,19 +8,6 @@
   "options_ui": {
       "page": "options.html"
   },
-  "browser_action": {
-      "default_icon": "img/unicorn.png",
-      "default_popup": "popup.html",
-      "default_title": "Capture page, with extra information"
-  },
-  "commands": {
-    "capture-simple": {
-      "description": "Quick capture: url, title and selection"
-    },
-    "_execute_browser_action": {
-      "description": "Capture page, with extra information"
-    }
-  },
   "icons": {
       "128": "img/unicorn.png"
   },

extension/webpack.config.js

@@ -25,34 +25,74 @@ const target = env.TARGET;
 
 const name = "grasp" + (dev ? ' [dev]' : '');
 
-// Firefox wouldn't let you rebind its default shortcuts most of which use Shift
-// On the other hand, Chrome wouldn't let you use Alt
-const modifier = target === T.CHROME ? 'Shift' : 'Alt';
 
 // ugh. declarative formats are shit.
-const commandsExtra = {
+
+// Firefox wouldn't let you rebind its default shortcuts most of which use Shift
+// On the other hand, Chrome wouldn't let you use Alt
+const modifier = target === T.CHROME ? 'Shift' : 'Alt'
+
+const action_name = 'browser_action'
+
+const commands = {
     "capture-simple": {
+        "description": "Quick capture: url, title and selection",
         "suggested_key": {
             "default": `Ctrl+${modifier}+C`,
-            "mac":  `Command+${modifier}+C`
-        }
+            "mac":  `Command+${modifier}+C`,
         },
-    "_execute_browser_action": {
+    }
+}
+
+commands[`_execute_${action_name}`] = {
+        "description": "Capture page, with extra information",
         "suggested_key": {
             "default": `Ctrl+${modifier}+Y`,
-            "mac":  `Command+${modifier}+Y`
-        }
+            "mac":  `Command+${modifier}+Y`,
         },
-};
+}
+
+
+const action = {
+    "default_icon": "img/unicorn.png",
+    "default_popup": "popup.html",
+    "default_title": "Capture page, with extra information",
+}
+if (target == T.FIREFOX) {
+     action['browser_style'] = true
+}
+
+
+// prepare for manifest v3
+const host_permissions = [
+    "http://localhost/capture",
+    "https://localhost/capture",
+]
+
+
+const optional_permissions = [
+    "http://*/capture",
+    "https://*/capture",
+]
+
 
 // TODO make permissions literate
 const permissions = [
     "storage",
     "notifications",
+
+    // need to query active tab and get its url/title
     "activeTab",  
-    "http://localhost/capture",
-    "https://localhost/capture"
-];
+
+    ...host_permissions,
+]
+
+if (target === T.FIREFOX) {
+    // chrome v2 doesn't support scripting api
+    // code has a fallback just for that
+    // need to get selected text
+    permissions.push("scripting")
+}
 
 
 const manifestExtra = {
@@ -60,12 +100,11 @@ const manifestExtra = {
     version: pkg.version,
     description: pkg.description,
     permissions: permissions,
-    commands: commandsExtra,
-    optional_permissions: [
-        "http://*/capture",
-        "https://*/capture",
-    ],
-};
+    commands: commands,
+    optional_permissions: optional_permissions,
+}
+manifestExtra[action_name] = action
+
 
 if (dev) {
     manifestExtra.content_security_policy = "script-src 'self' 'unsafe-eval'; object-src 'self'";
@@ -76,7 +115,6 @@ if (target === T.CHROME) {
 }
 if (target === T.FIREFOX) {
     manifestExtra.options_ui = {browser_style: true};
-    manifestExtra.browser_action = {browser_style: true};
 }
 
 const buildPath = path.join(__dirname, 'dist', target);