2 files changed, 44 insertions, 1 deletions
diff --git a/src/content/index.js b/src/content/index.js
index fceed4b..e77bb0a 100644
--- a/src/content/index.js
+++ b/src/content/index.js
@@ -1,3 +1,16 @@
+import * as scrolls from './scrolls';
+
+const invokeEvent = (type) => {
+  switch (type) {
+  case 'scroll.up':
+    scrolls.scrollUp(window);
+    break;
+  case 'scroll.down':
+    scrolls.scrollDown(window);
+    break;
+  }
+}
+
 window.addEventListener("keypress", (e) => {
   browser.runtime.sendMessage({
     key: e.which || e.keyCode,
@@ -5,7 +18,10 @@ window.addEventListener("keypress", (e) => {
     alt: e.alt,
     meta: e.meta,
     ctrl: e.ctrl,
-  }).then(() => {
+  }).then((response) => {
+    if (response) {
+      invokeEvent(response);
+    }
   }, (err) => {
     console.log(`Vim Vixen: ${err}`);
   });
diff --git a/src/content/scrolls.js b/src/content/scrolls.js
new file mode 100644
index 0000000..76d1aa2
--- /dev/null
+++ b/src/content/scrolls.js
@@ -0,0 +1,27 @@
+const SCROLL_DELTA = 48;
+
+const scrollUp = (page) => {
+  let x = page.scrollX;
+  var y = page.scrollY - SCROLL_DELTA;
+  page.scrollTo(x, y);
+};
+
+const scrollDown = (page) => {
+  let x = page.scrollX;
+  var y = page.scrollY + SCROLL_DELTA;
+  page.scrollTo(x, y);
+};
+
+const scrollToTop = (page) => {
+  let x = page.scrollX;
+  var y = page.scrollMaxY;
+  page.scrollTo(x, y);
+};
+
+const scrollToBottom = (page) => {
+  let x = page.scrollX;
+  var y = 0;
+  page.scrollTo(x, y);
+};
+
+export { scrollUp, scrollDown, scrollToTop, scrollToBottom }