Copying text closes the keyboard and the text input gets unfocused, forcing virtual keyboard is get…

Source/web/WebLocalFrameImpl.cpp

Index: Source/web/WebLocalFrameImpl.cpp
diff --git a/Source/web/WebLocalFrameImpl.cpp b/Source/web/WebLocalFrameImpl.cpp
index 9da6d1bc717b6c2687451c6a1db43f858cdc1764..c2e4a7605977dea95d620971f7948e6fcdeedbe3 100644
--- a/Source/web/WebLocalFrameImpl.cpp
+++ b/Source/web/WebLocalFrameImpl.cpp
@@ -1842,6 +1842,31 @@ void WebLocalFrameImpl::setFindEndstateFocusAndSelection()
     }
 }
 
+bool WebLocalFrameImpl::setCaretSelectionFromRangeSelection()
+{
+    if (hasSelection()) {

[yosin_UTC9, 2014/06/13 04:20:15]

nit: We prefer early return, e.g.

if (!hasSelection())
  return false;

....

+        // Check whether Selection exists
+        FrameSelection& selection = frame()->selection();
+        if (selection.isInTextField() && selection.isRange()) {

[yosin_UTC9, 2014/06/13 04:20:15]

We may want not lose selection for contenteditable and TEXTAREA? It seems
isInTextFiled() doesn't return true for TEXTAREA.

How about |if (selection.rootEditablElement() && selection.isRange())|?

[AKVT, 2014/06/16 10:34:34]

Done.

[AKVT, 2014/06/16 10:34:34]

Done.

+            // Check whether it's a range selection. It appears to be reduandant.

[yosin_UTC9, 2014/06/13 04:20:15]

It seems Selection.collapseToEnd() == selection().moveTo(selection.end()) is
enough.

[AKVT, 2014/06/16 10:34:34]

Done.

+            // During copy, Range selection should be available. For safety purpse added this condition.

[Yuta Kitamura, 2014/06/16 07:58:43]

typo: purpse

[AKVT, 2014/06/16 10:34:34]

Done.

+            RefPtrWillBeRawPtr<Range> selectedRange = selection.toNormalizedRange();
+            if (!selectedRange)
+                return false;
+
+            int startOffset = selectedRange->startOffset();
+            int endOffset = selectedRange->endOffset();
+            if (startOffset != endOffset) {
+                // Convert to Caret selection without clearing selection to allow continouous editing after copy.
+                frame()->inputMethodController().setEditableSelectionOffsets(PlainTextRange(endOffset, endOffset));
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
 void WebLocalFrameImpl::didFail(const ResourceError& error, bool wasProvisional)
 {
     if (!client())