3 files changed, 67 insertions, 0 deletions
diff --git a/src/content/actions/find.js b/src/content/actions/find.js
new file mode 100644
index 0000000..80d6210
--- /dev/null
+++ b/src/content/actions/find.js
@@ -0,0 +1,55 @@
+//
+// window.find(aString, aCaseSensitive, aBackwards, aWrapAround,
+//             aWholeWord, aSearchInFrames);
+//
+// NOTE: window.find is not standard API
+// https://developer.mozilla.org/en-US/docs/Web/API/Window/find
+
+import actions from 'content/actions';
+import * as consoleFrames from '../console-frames';
+
+const postPatternNotFound = (pattern) => {
+  return consoleFrames.postError(
+    window.document,
+    'Pattern not found: ' + pattern);
+};
+
+const find = (string, backwards) => {
+  let caseSensitive = false;
+  let wrapScan = true;
+
+
+  // NOTE: aWholeWord dows not implemented, and aSearchInFrames does not work
+  // because of same origin policy
+  return window.find(string, caseSensitive, backwards, wrapScan);
+};
+
+const findNext = (keyword, reset, backwards) => {
+  if (reset) {
+    window.getSelection().removeAllRanges();
+  }
+
+  let found = find(keyword, backwards);
+  if (!found) {
+    window.getSelection().removeAllRanges();
+    found = find(keyword, backwards);
+  }
+  if (!found) {
+    postPatternNotFound(keyword);
+  }
+  return {
+    type: actions.FIND_SET_KEYWORD,
+    keyword,
+    found,
+  };
+};
+
+const next = (keyword, reset) => {
+  return findNext(keyword, reset, false);
+};
+
+const prev = (keyword, reset) => {
+  return findNext(keyword, reset, true);
+};
+
+export { next, prev };
diff --git a/src/content/actions/index.js b/src/content/actions/index.js
index 8cc2303..7e32e12 100644
--- a/src/content/actions/index.js
+++ b/src/content/actions/index.js
@@ -21,4 +21,7 @@ export default {
   FOLLOW_CONTROLLER_DISABLE: 'follow.controller.disable',
   FOLLOW_CONTROLLER_KEY_PRESS: 'follow.controller.key.press',
   FOLLOW_CONTROLLER_BACKSPACE: 'follow.controller.backspace',
+
+  // Find
+  FIND_SET_KEYWORD: 'find.set.keyword',
 };
diff --git a/src/content/actions/operation.js b/src/content/actions/operation.js
index 897f361..767f14b 100644
--- a/src/content/actions/operation.js
+++ b/src/content/actions/operation.js
@@ -6,6 +6,7 @@ import * as urls from 'content/urls';
 import * as consoleFrames from 'content/console-frames';
 import * as addonActions from './addon';
 
+// eslint-disable-next-line complexity
 const exec = (operation) => {
   switch (operation.type) {
   case operations.ADDON_ENABLE:
@@ -14,6 +15,14 @@ const exec = (operation) => {
     return addonActions.disable();
   case operations.ADDON_TOGGLE_ENABLED:
     return addonActions.toggleEnabled();
+  case operations.FIND_NEXT:
+    return window.top.postMessage(JSON.stringify({
+      type: messages.FIND_NEXT,
+    }), '*');
+  case operations.FIND_PREV:
+    return window.top.postMessage(JSON.stringify({
+      type: messages.FIND_PREV,
+    }), '*');
   case operations.SCROLL_VERTICALLY:
     return scrolls.scrollVertically(window, operation.count);
   case operations.SCROLL_HORIZONALLY: