Add support for frontend hotkeys; add scanSelectedText action (#1266)

* Add support for frontend hotkeys; add scanSelectedText action

* Remove unused global

* Remove duplicate hotkey handler script

2 files changed, 41 insertions, 2 deletions

diff --git a/ext/fg/js/content-script-main.js b/ext/fg/js/content-script-main.js
index 80a600e2..42f95e24 100644
--- a/ext/fg/js/content-script-main.js
+++ b/ext/fg/js/content-script-main.js
@@ -17,6 +17,7 @@
 
 /* global
  * Frontend
+ * HotkeyHandler
  * PopupFactory
  * api
  */
@@ -31,6 +32,9 @@
             throw new Error('Failed to get frameId');
         }
 
+        const hotkeyHandler = new HotkeyHandler();
+        hotkeyHandler.prepare();
+
         const popupFactory = new PopupFactory(frameId);
         popupFactory.prepare();
 
@@ -42,7 +46,8 @@
             parentFrameId: null,
             useProxyPopup: false,
             pageType: 'web',
-            allowRootFramePopupProxy: true
+            allowRootFramePopupProxy: true,
+            hotkeyHandler
         });
         await frontend.prepare();
 
diff --git a/ext/fg/js/frontend.js b/ext/fg/js/frontend.js
index d789c4f0..e9b57eb5 100644
--- a/ext/fg/js/frontend.js
+++ b/ext/fg/js/frontend.js
@@ -19,6 +19,7 @@
  * DocumentUtil
  * TextScanner
  * TextSourceElement
+ * TextSourceRange
  * api
  */
 
@@ -32,7 +33,8 @@ class Frontend {
         parentFrameId,
         useProxyPopup,
         allowRootFramePopupProxy,
-        childrenSupported=true
+        childrenSupported=true,
+        hotkeyHandler
     }) {
         this._pageType = pageType;
         this._popupFactory = popupFactory;
@@ -43,6 +45,7 @@ class Frontend {
         this._useProxyPopup = useProxyPopup;
         this._allowRootFramePopupProxy = allowRootFramePopupProxy;
         this._childrenSupported = childrenSupported;
+        this._hotkeyHandler = hotkeyHandler;
         this._popup = null;
         this._disabledOverride = false;
         this._options = null;
@@ -71,6 +74,10 @@ class Frontend {
             ['setAllVisibleOverride',         {async: true,  handler: this._onApiSetAllVisibleOverride.bind(this)}],
             ['clearAllVisibleOverride',       {async: true,  handler: this._onApiClearAllVisibleOverride.bind(this)}]
         ]);
+
+        this._hotkeyHandler.registerActions([
+            ['scanSelectedText', this._onActionScanSelectedText.bind(this)]
+        ]);
     }
 
     get canClearSelection() {
@@ -161,6 +168,12 @@ class Frontend {
         this._signalFrontendReady(frameId);
     }
 
+    // Action handlers
+
+    _onActionScanSelectedText() {
+        this._scanSelectedText();
+    }
+
     // API message handlers
 
     _onApiGetUrl() {
@@ -319,6 +332,8 @@ class Frontend {
         const {scanning: scanningOptions, sentenceParsing: sentenceParsingOptions} = options;
         this._options = options;
 
+        this._hotkeyHandler.setHotkeys('web', options.inputs.hotkeys);
+
         await this._updatePopup();
 
         const preventMiddleMouse = this._getPreventMiddleMouseValueForPageType(scanningOptions.preventMiddleMouse);
@@ -646,4 +661,23 @@ class Frontend {
             detail: {documentTitle}
         };
     }
+
+    async _scanSelectedText() {
+        const range = this._getFirstNonEmptySelectionRange();
+        if (range === null) { return false; }
+        const source = new TextSourceRange(range, range.toString(), null, null);
+        await this._textScanner.search(source, {focus: true});
+        return true;
+    }
+
+    _getFirstNonEmptySelectionRange() {
+        const selection = window.getSelection();
+        for (let i = 0, ii = selection.rangeCount; i < ii; ++i) {
+            const range = selection.getRangeAt(i);
+            if (range.toString().length > 0) {
+                return range;
+            }
+        }
+        return null;
+    }
 }