Merge pull request #3 from lewisl9029/dev-single-codebase-for-multipl…

…e-browsers

Dev single codebase for multiple browsers

extension/just-save.js

@@ -0,0 +1,102 @@
+'use strict';
+
+let isChrome = window.browser === undefined;
+
+// adding browser shim for chrome support
+if (isChrome) {
+  window.browser = chrome;
+}
+
+const logResult = result => {
+  if (browser.extension.lastError) {
+    return;
+    // debugging to console is not allowed for production extensions according to
+    // preliminary review for firefox: 
+    // Please note the following for the next update:
+    // 1) Your add-on prints debugging information to the Console, which is generally not allowed in production add-ons.
+
+    // return console.error(browser.extension.lastError);
+  }
+
+  // return console.log(result);
+};
+
+
+const addOnInstalledListener = handleInstalled => {
+  if (isChrome) {
+    // enables use of non-persistent event page for chrome (not supported in firefox)
+    // https://developer.chrome.com/extensions/event_pages
+    return browser.runtime.onInstalled.addListener(handleInstalled);
+  } 
+
+  return handleInstalled();
+};
+
+const addOnClickListener = handleClick => {
+  if (isChrome) {
+    // workaround for firefox contextMenus.onClicked.addListener bug
+    return browser.contextMenus.onClicked.addListener(handleClick);
+  }
+};
+
+const downloadElement = clickContext => {
+  if (clickContext.menuItemId !== 'just-save') {
+    return;
+  }
+
+  const url = clickContext.srcUrl || clickContext.linkUrl || clickContext.pageUrl; 
+
+  if (!url) {
+    // return console.error(`No url found for current click context`);
+    return;
+  }
+
+  // need to specify filename for non-image contexts to workaround firefox name bug
+  // TODO: document this bug and report on https://discourse.mozilla-community.org/c/add-ons/development
+  const filename = isChrome ? 
+    undefined :
+    clickContext.srcUrl ? 
+      undefined : 
+      // FIXME: not ideal for links to actual files, images, etc
+      clickContext.linkUrl ? 'link.htm' : 'page.htm';
+
+  const downloadOptions = {
+    url,
+    filename
+    // filename,
+    // conflictAction: 'prompt', //not implemented yet in firefox 47, defaults to uniquify
+    // saveAs: false //not implemented yet in firefox 47, defaults to false
+  };
+
+  browser.downloads.download(
+    downloadOptions, 
+    logResult
+  );
+};
+
+const createMenuItems = () => {
+  // avoids duplicates on upgrade by removing existing menu items first
+  browser.contextMenus.removeAll(result => {
+    logResult(result);
+
+    const menuProperties = {
+      id: 'just-save',
+      title: 'Just Save',
+      contexts: ['all'],
+      // workaround for firefox contextMenus.onClicked.addListener bug
+      onclick: isChrome ? undefined : downloadElement 
+    };
+
+    browser.contextMenus.create(
+      menuProperties,
+      logResult
+    );
+  });
+};
+
+addOnInstalledListener(createMenuItems);
+addOnClickListener(downloadElement);
+
+// FIXME: doesn't seem to work?
+// TODO: report as a bug
+// browser.contextMenus.onClicked.addListener(downloadElement);

firefox/manifest.json → extension/manifest.json

@@ -9,7 +9,7 @@
     "48": "icons/just-save-48.png",
     "96": "icons/just-save-96.png"
   },
-
+  
   "applications": {
     "gecko": {
       "id": "just-save@lewisl.webextension",
@@ -18,6 +18,7 @@
   },
 
   "background": {
+    "persistent": false,
     "scripts": ["just-save.js"]
   },