2 files changed, 81 insertions, 0 deletions
diff --git a/src/content/index.js b/src/content/index.js
new file mode 100644
index 0000000..03efc5e
--- /dev/null
+++ b/src/content/index.js
@@ -0,0 +1,54 @@
+import * as scrolls from './scrolls';
+import * as actions from '../shared/actions';
+
+const invokeEvent = (action) => {
+  if (typeof action === 'undefined' || action === null) {
+    return;
+  }
+
+  switch (action[0]) {
+  case actions.SCROLL_UP:
+    scrolls.scrollUp(window, action[1] || 1);
+    break;
+  case actions.SCROLL_DOWN:
+    scrolls.scrollDown(window, action[1] || 1);
+    break;
+  case actions.SCROLL_TOP:
+    scrolls.scrollTop(window, action[1]);
+    break;
+  case actions.SCROLL_BOTTOM:
+    scrolls.scrollBottom(window, action[1]);
+    break;
+  }
+}
+
+const isModifier = (code) => {
+  return code === KeyboardEvent.DOM_VK_SHIFT ||
+    code === KeyboardEvent.DOM_VK_ALT ||
+    code === KeyboardEvent.DOM_VK_CONTROL ||
+    code === KeyboardEvent.DOM_VK_META;
+}
+
+window.addEventListener("keydown", (e) => {
+  if (e.target instanceof HTMLInputElement) {
+    return;
+  }
+  if (isModifier(e.keyCode)) {
+    return;
+  }
+
+  let request = {
+    type: 'event.keydown',
+    code: e.keyCode,
+    shift: e.shiftKey,
+    alt: e.altKey,
+    meta: e.metaKey,
+    ctrl: e.ctrlKey,
+  }
+
+  browser.runtime.sendMessage(request)
+    .then(invokeEvent,
+      (err) => {
+        console.log(`Vim Vixen: ${err}`);
+      });
+});
diff --git a/src/content/scrolls.js b/src/content/scrolls.js
new file mode 100644
index 0000000..2a233c2
--- /dev/null
+++ b/src/content/scrolls.js
@@ -0,0 +1,27 @@
+const SCROLL_DELTA = 48;
+
+const scrollUp = (page, count) => {
+  let x = page.scrollX;
+  let y = page.scrollY - SCROLL_DELTA * count;
+  page.scrollTo(x, y);
+};
+
+const scrollDown = (page, count) => {
+  let x = page.scrollX;
+  let y = page.scrollY + SCROLL_DELTA * count;
+  page.scrollTo(x, y);
+};
+
+const scrollTop = (page) => {
+  let x = page.scrollX;
+  let y = 0;
+  page.scrollTo(x, y);
+};
+
+const scrollBottom = (page) => {
+  let x = page.scrollX;
+  let y = page.scrollMaxY;
+  page.scrollTo(x, y);
+};
+
+export { scrollUp, scrollDown, scrollTop, scrollBottom }