Add CefFrame.selectAll (fixes chromiumembedded#428)

Also implements common keyboard shortcuts on Mac.

java/org/cef/browser/CefFrame.java

@@ -98,4 +98,9 @@ public interface CefFrame {
      * Execute paste in this frame.
      */
     public void paste();
-}
+
+    /**
+     * Execute selectAll in this frame.
+     */
+    public void selectAll();
+}

java/org/cef/browser/CefFrame_N.java

@@ -148,6 +148,14 @@ public void paste() {
         }
     }
 
+    public void selectAll() {
+        try {
+            N_SelectAll(getNativeRef(null));
+        } catch (UnsatisfiedLinkError ule) {
+            ule.printStackTrace();
+        }
+    }
+
     private final native void N_Dispose(long self);
     private final native long N_GetIdentifier(long self);
     private final native String N_GetURL(long self);
@@ -162,4 +170,5 @@ public void paste() {
     private final native void N_Cut(long self);
     private final native void N_Copy(long self);
     private final native void N_Paste(long self);
+    private final native void N_SelectAll(long self);
 }

java/tests/detailed/handler/KeyboardHandler.java

@@ -20,6 +20,32 @@ public boolean onKeyEvent(CefBrowser browser, CefKeyEvent event) {
                 browser.executeJavaScript("alert('You pressed the space bar!');", "", 0);
             }
             return true;
+        } else if (event.type == CefKeyEvent.EventType.KEYEVENT_RAWKEYDOWN && event.is_system_key) {
+            // CMD+[key] is not working on a Mac.
+            // This switch statement delegates the common keyboard shortcuts to the browser
+            switch (event.unmodified_character) {
+                case 'a':
+                    browser.getFocusedFrame().selectAll();
+                    break;
+                case 'c':
+                    browser.getFocusedFrame().copy();
+                    break;
+                case 'v':
+                    browser.getFocusedFrame().paste();
+                    break;
+                case 'x':
+                    browser.getFocusedFrame().cut();
+                    break;
+                case 'z':
+                    browser.getFocusedFrame().undo();
+                    break;
+                case 'Z':
+                    browser.getFocusedFrame().redo();
+                    break;
+                default:
+                    return false;
+            }
+            return true;
         }
         return false;
     }

native/CefFrame_N.cpp

@@ -164,3 +164,14 @@ JNIEXPORT void JNICALL Java_org_cef_browser_CefFrame_1N_N_1Paste(JNIEnv* env,
 
   frame->Paste();
 }
+
+JNIEXPORT void JNICALL
+Java_org_cef_browser_CefFrame_1N_N_1SelectAll(JNIEnv* env,
+                                              jobject obj,
+                                              jlong self) {
+  CefRefPtr<CefFrame> frame = GetSelf(self);
+  if (!frame)
+    return;
+
+  frame->SelectAll();
+}