Enabled user js for firefox + global keybindings manager

1 files changed, 102 insertions, 0 deletions

diff --git a/modules/firefox.home/chrome/globalKeybindings.uc.js b/modules/firefox.home/chrome/globalKeybindings.uc.js
new file mode 100644
index 0000000..95d8a10
--- /dev/null
+++ b/modules/firefox.home/chrome/globalKeybindings.uc.js
@@ -0,0 +1,102 @@
+// ==UserScript==
+// @name                 Global Keybindings
+// @version              1.0
+// @description          Setup global keybindings on all windows
+// @startup              UC.globalKeybindings.init(win);
+// @shutdown             UC.globalKeybindings.destroy();
+// ==/UserScript==
+
+
+(() => {
+  // Configure global keybindings
+  const KEYBINDINGS = () => ({
+    RELEASE: [
+      [ctrl(key('j')), nextTab()],
+      [ctrl(key('k')), prevTab()],
+      [alt(key('j')), moveSelectedTabBy(+1)],
+      [alt(key('k')), moveSelectedTabBy(-1)],
+      [ctrl(shift(key('J'))), moveSelectedTabBy(+1)],
+      [ctrl(shift(key('K'))), moveSelectedTabBy(-1)],
+
+      ...(Array.from({ length: 10 }, (_, idx) =>
+        [ctrl(key(idx === 9 ? 0 : idx + 1)), tabIndex(idx)],
+      )),
+    ],
+    PRESS: [
+      // Prevent the default browser's action
+      [ctrl(shift(key('J'))), preventDefault()],
+      [ctrl(shift(key('K'))), preventDefault()],
+    ],
+  });
+
+  const nextTab = () => () => updateTabIndex((n, len) => (n + 1) % len);
+  const prevTab = () => () => updateTabIndex((n, len) => n === 0 ? len - 1 : n - 1);
+  const tabIndex = idx => () => updateTabIndex((_n, _len) => idx)
+  const preventDefault = f => e => { e.preventDefault(); f?.(e); };
+  const moveSelectedTabBy = incr => () => updateSelectedTabIndex(incr);
+
+  const ctrl = b => e => b(e) && e.ctrlKey;
+  const alt = b => e => b(e) && e.altKey;
+  const shift = b => e => b(e) && e.shiftKey;
+  const key = key => e => `${e.key}` === `${key}`;
+
+  const updateTabIndex = (f) => {
+    const newIndex = f(gBrowser.tabContainer.selectedIndex, gBrowser.tabs.length)
+    if (typeof newIndex !== 'number') return;
+    if (newIndex >= gBrowser.tabContainer.allTabs.length) return;
+    if (newIndex < 0) return;
+    gBrowser.selectTabAtIndex(newIndex);
+  };
+
+  const updateSelectedTabIndex = (incr) => {
+    if (typeof incr !== 'number') return;
+    if (incr === +1) return gBrowser.moveTabForward();
+    if (incr === -1) return gBrowser.moveTabBackward();
+    const newIndex = gBrowser.tabContainer.selectedIndex + incr;
+    if (newIndex >= gBrowser.tabContainer.allTabs.length) return;
+    if (newIndex < 0) return;
+    gBrowser.moveTabTo(gBrowser.selectedTab, newIndex)
+  };
+
+  const module = {
+    enabled: true,
+
+    evaluateKeybindings: (bindings, e) => {
+      if (!module.enabled) return;
+
+      for (const [isKey, action] of bindings) {
+        if (isKey(e)) {
+          const shouldContinue = action(e);
+          if (!shouldContinue) break;
+        }
+      }
+    },
+
+    handleKeyUpEvent: e => module.evaluateKeybindings(KEYBINDINGS().RELEASE, e),
+    handleKeyDownEvent: e => module.evaluateKeybindings(KEYBINDINGS().PRESS, e),
+
+    init(win) {
+      let observe = () => {
+        Services.obs.removeObserver(observe, 'browser-window-before-show');
+        win.addEventListener('keyup', module.handleKeyUpEvent, true);
+        win.addEventListener('keydown', module.handleKeyDownEvent, true);
+      }
+
+      if (win.__SSi) {
+        win.addEventListener('keyup', module.handleKeyUpEvent, true);
+        win.addEventListener('keydown', module.handleKeyDownEvent, true);
+      } else {
+        Services.obs.addObserver(observe, 'browser-window-before-show');
+      }
+    },
+    destroy() {
+      _uc.windows((_doc, win) => {
+        win.removeEventListener('keyup', module.handleKeyUpEvent, true);
+        win.removeEventListener('keydown', module.handleKeyDownEvent, true);
+      });
+      delete UC.globalKeybindings;
+    },
+  };
+
+  UC.globalKeybindings = module;
+})();