Gray out button on URL schemes the Wayback Machine doesn’t indexv1.0.1

Switch from a browser action to a page action, and disable the page
action on some pages clearly not accessible through the Wayback Machine
(e.g., pages under chrome://).

1 files changed, 15 insertions, 1 deletions

diff --git a/background.js b/background.js
index 30d924a..6beab65 100644
--- a/background.js
+++ b/background.js
@@ -12,6 +12,20 @@
 // License for the specific language governing permissions and limitations under
 // the License.
 
-chrome.browserAction.onClicked.addListener(function(tab) {
+chrome.pageAction.onClicked.addListener(function(tab) {
   chrome.tabs.update(null, {url: 'https://web.archive.org/web/*/' + tab.url});
 });
+
+chrome.runtime.onInstalled.addListener(function() {
+  chrome.declarativeContent.onPageChanged.removeRules(null, function() {
+    chrome.declarativeContent.onPageChanged.addRules([
+      {
+        conditions: [
+          new chrome.declarativeContent.PageStateMatcher(
+              {pageUrl: {schemes: ['ftp', 'http', 'https']}}),
+        ],
+        actions: [new chrome.declarativeContent.ShowPageAction()],
+      },
+    ]);
+  });
+});