set find keyword from background

src/content/actions/find.js

@@ -5,6 +5,7 @@
 // NOTE: window.find is not standard API
 // https://developer.mozilla.org/en-US/docs/Web/API/Window/find
 
+import messages from 'shared/messages';
 import actions from 'content/actions';
 import * as consoleFrames from '../console-frames';
 
@@ -31,11 +32,24 @@ const find = (string, backwards) => {
   return window.find(string, caseSensitive, backwards, wrapScan);
 };
 
-const findNext = (keyword, reset, backwards) => {
+const findNext = (currentKeyword, reset, backwards) => {
   if (reset) {
     window.getSelection().removeAllRanges();
   }
 
+  let promise = Promise.resolve(currentKeyword);
+  if (currentKeyword) {
+    browser.runtime.sendMessage({
+      type: messages.FIND_SET_KEYWORD,
+      keyword: currentKeyword,
+    });
+  } else {
+    promise = browser.runtime.sendMessage({
+      type: messages.FIND_GET_KEYWORD,
+    });
+  }
+
+  return promise.then((keyword) => {
     let found = find(keyword, backwards);
     if (!found) {
       window.getSelection().removeAllRanges();
@@ -52,14 +66,15 @@ const findNext = (keyword, reset, backwards) => {
       keyword,
       found,
     };
+  });
 };
 
-const next = (keyword, reset) => {
-  return findNext(keyword, reset, false);
+const next = (currentKeyword, reset) => {
+  return findNext(currentKeyword, reset, false);
 };
 
-const prev = (keyword, reset) => {
-  return findNext(keyword, reset, true);
+const prev = (currentKeyword, reset) => {
+  return findNext(currentKeyword, reset, true);
 };
 
 export { next, prev };

src/content/reducers/find.js

@@ -1,7 +1,7 @@
 import actions from 'content/actions';
 
 const defaultState = {
-  keyword: '',
+  keyword: null,
   found: false,
 };
 

test/content/reducers/find.test.js

@@ -5,7 +5,7 @@ import findReducer from 'content/reducers/find';
 describe("find reducer", () => {
   it('return the initial state', () => {
     let state = findReducer(undefined, {});
-    expect(state).to.have.property('keyword', '');
+    expect(state).to.have.property('keyword', null);
     expect(state).to.have.property('found', false);
   });