[SelectMisspellingAsync #1] Move SelectMisspellingAsync() from ContextMenuClient.cpp to SpellChecker

third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.cpp

Index: third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.cpp
diff --git a/third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.cpp b/third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.cpp
index e9b038595ed2bcc949c7bbbeb76524d5ab1f6734..c279e5a3433bf1eb4657d5ec6037c7502d5aede7 100644
--- a/third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.cpp
+++ b/third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.cpp
@@ -95,6 +95,10 @@ SelectionInDOMTree SelectWord(const VisiblePosition& position) {
       .Build();
 }
 
+static bool IsWhiteSpaceOrPunctuation(UChar c) {
+  return IsSpaceOrNewline(c) || WTF::Unicode::IsPunct(c);
+}
+
 }  // namespace
 
 SpellChecker* SpellChecker::Create(LocalFrame& frame) {
@@ -867,6 +871,61 @@ SpellChecker::GetSpellCheckMarkerUnderSelection() {
   return std::make_pair(selection_start_container, ToSpellCheckMarker(marker));
 }
 
+String SpellChecker::SelectMisspellingAsync(String& description) {
+  VisibleSelection selection =
+      GetFrame().Selection().ComputeVisibleSelectionInDOMTree();
+  if (selection.IsNone())
+    return String();
+
+  // Caret and range selections always return valid normalized ranges.
+  const EphemeralRange& selection_range =
+      selection.ToNormalizedEphemeralRange();
+
+  Node* const selection_start_container =
+      selection_range.StartPosition().ComputeContainerNode();
+  Node* const selection_end_container =
+      selection_range.EndPosition().ComputeContainerNode();
+
+  // We don't currently support the case where a misspelling spans multiple
+  // nodes. See crbug.com/720065
+  if (selection_start_container != selection_end_container)
+    return String();
+
+  const unsigned selection_start_offset =
+      selection_range.StartPosition().ComputeOffsetInContainerNode();
+  const unsigned selection_end_offset =
+      selection_range.EndPosition().ComputeOffsetInContainerNode();
+
+  const DocumentMarkerVector& markers_in_node =
+      GetFrame().GetDocument()->Markers().MarkersFor(
+          selection_start_container, DocumentMarker::MisspellingMarkers());
+
+  const auto marker_it =
+      std::find_if(markers_in_node.begin(), markers_in_node.end(),
+                   [=](const DocumentMarker* marker) {
+                     return marker->StartOffset() < selection_end_offset &&
+                            marker->EndOffset() > selection_start_offset;
+                   });
+  if (marker_it == markers_in_node.end())
+    return String();
+
+  const SpellCheckMarker* const found_marker = ToSpellCheckMarker(*marker_it);
+  description = found_marker->Description();
+
+  Range* const marker_range =
+      Range::Create(*GetFrame().GetDocument(), selection_start_container,
+                    found_marker->StartOffset(), selection_start_container,
+                    found_marker->EndOffset());
+
+  if (marker_range->GetText().StripWhiteSpace(&IsWhiteSpaceOrPunctuation) !=
+      CreateRange(selection_range)
+          ->GetText()
+          .StripWhiteSpace(&IsWhiteSpaceOrPunctuation))
+    return String();
+
+  return marker_range->GetText();
+}
+
 void SpellChecker::ReplaceMisspelledRange(const String& text) {
   const Optional<std::pair<Node*, SpellCheckMarker*>>& node_and_marker =
       GetSpellCheckMarkerUnderSelection();