[DMC #1] Refactor DocumentMarkerController on top of new DocumentMarkerListEditor class

third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
@@ skipping 216 matching lines @@
     markers->Grow(DocumentMarker::kMarkerTypeIndexesCount);
   }
 
   DocumentMarker::MarkerTypeIndex marker_list_index =
       MarkerTypeToMarkerIndex(new_marker.GetType());
   if (!markers->at(marker_list_index)) {
     markers->at(marker_list_index) = new MarkerList;
   }
 
   Member<MarkerList>& list = markers->at(marker_list_index);
-  RenderedDocumentMarker* new_rendered_marker =
-      RenderedDocumentMarker::Create(new_marker);
-  if (list->IsEmpty() || list->back()->EndOffset() < new_marker.StartOffset()) {
-    list->push_back(new_rendered_marker);
-  } else {
-    if (new_marker.GetType() != DocumentMarker::kTextMatch &&
-        new_marker.GetType() != DocumentMarker::kComposition) {
-      MergeOverlapping(list.Get(), new_rendered_marker);
-    } else {
-      MarkerList::iterator pos = std::lower_bound(list->begin(), list->end(),
-                                                  &new_marker, StartsFurther);
-      list->insert(pos - list->begin(), new_rendered_marker);
-    }
-  }
+  DocumentMarkerListEditor::AddMarker(list, &new_marker);
 
   // repaint the affected node
   if (node->GetLayoutObject()) {
     node->GetLayoutObject()->SetShouldDoFullPaintInvalidation(
         kPaintInvalidationDocumentMarkerChange);
   }
 }
 
-void DocumentMarkerController::MergeOverlapping(
+// TODO(rlanday): move DocumentMarkerListEditor into its own .h/.cpp files
+void DocumentMarkerListEditor::AddMarker(MarkerList* list,

[yosin_UTC9, 2017/04/17 06:59:01]

Note: Since we can't introduce this function in middle of DMC::AddMarker(),
This code is the result of copy-and-paste. We'll do re-factoring in another CL.

+                                         const DocumentMarker* marker) {
+  RenderedDocumentMarker* rendered_marker =
+      RenderedDocumentMarker::Create(*marker);
+  if (list->IsEmpty() || list->back()->EndOffset() < marker->StartOffset()) {
+    list->push_back(rendered_marker);
+  } else {
+    if (marker->GetType() != DocumentMarker::kTextMatch &&
+        marker->GetType() != DocumentMarker::kComposition) {
+      MergeOverlapping(list, rendered_marker);
+    } else {
+      MarkerList::iterator pos =
+          std::lower_bound(list->begin(), list->end(), marker, StartsFurther);
+      list->insert(pos - list->begin(), rendered_marker);
+    }
+  }
+}
+
+// TODO(rlanday): move DocumentMarkerListEditor into its own .h/.cpp files
+void DocumentMarkerListEditor::MergeOverlapping(
     MarkerList* list,
     RenderedDocumentMarker* to_insert) {
   MarkerList::iterator first_overlapping =
       std::lower_bound(list->begin(), list->end(), to_insert, DoesNotOverlap);
   size_t index = first_overlapping - list->begin();
   list->insert(index, to_insert);
   MarkerList::iterator inserted = list->begin() + index;
   first_overlapping = inserted + 1;
   for (MarkerList::iterator i = first_overlapping;
        i != list->end() && (*i)->StartOffset() <= (*inserted)->EndOffset();) {
@@ skipping 77 matching lines @@
        ++marker_list_index) {
     Member<MarkerList>& list = (*markers)[marker_list_index];
     if (!list || list->IsEmpty()) {
       if (list.Get() && list->IsEmpty())
         list.Clear();
       ++empty_lists_count;
       continue;
     }
     if (!marker_types.Contains((*list->begin())->GetType()))
       continue;
-    unsigned end_offset = start_offset + length;
-    MarkerList::iterator start_pos =
-        std::upper_bound(list->begin(), list->end(), start_offset, EndsBefore);
-    for (MarkerList::iterator i = start_pos; i != list->end();) {
-      DocumentMarker marker(*i->Get());
 
-      // markers are returned in order, so stop if we are now past the specified
-      // range
-      if (marker.StartOffset() >= end_offset)
-        break;
-
-      list->erase(i - list->begin());
+    if (DocumentMarkerListEditor::RemoveMarkers(list, start_offset, length))
       doc_dirty = true;
-    }
 
     if (list->IsEmpty()) {
       list.Clear();
       ++empty_lists_count;
     }
   }
 
   if (empty_lists_count == DocumentMarker::kMarkerTypeIndexesCount) {
     markers_.erase(node);
     if (markers_.IsEmpty())
       possibly_existing_marker_types_ = 0;
   }
 
   // repaint the affected node
   if (doc_dirty && node->GetLayoutObject()) {
     node->GetLayoutObject()->SetShouldDoFullPaintInvalidation(
         kPaintInvalidationDocumentMarkerChange);
   }
 }
 
+// TODO(rlanday): move DocumentMarkerListEditor into its own .h/.cpp files
+bool DocumentMarkerListEditor::RemoveMarkers(MarkerList* list,

[yosin_UTC9, 2017/04/17 06:59:01]

Note: Since we can't introduce this function in middle of DMC::RemoveMarker(),
This code is the result of copy-and-paste. We'll do re-factoring in another CL.

+                                             unsigned start_offset,
+                                             int length) {
+  bool doc_dirty = false;
+  unsigned end_offset = start_offset + length;
+  MarkerList::iterator start_pos =
+      std::upper_bound(list->begin(), list->end(), start_offset, EndsBefore);
+  for (MarkerList::iterator i = start_pos; i != list->end();) {
+    DocumentMarker marker(*i->Get());
+
+    // markers are returned in order, so stop if we are now past the specified
+    // range
+    if (marker.StartOffset() >= end_offset)
+      break;
+
+    list->erase(i - list->begin());
+    doc_dirty = true;
+  }
+
+  return doc_dirty;
+}
+
 DocumentMarkerVector DocumentMarkerController::MarkersFor(
     Node* node,
     DocumentMarker::MarkerTypes marker_types) {
   DocumentMarkerVector result;
 
   MarkerLists* markers = markers_.at(node);
   if (!markers)
     return result;
 
   for (size_t marker_list_index = 0;
@@ skipping 303 matching lines @@
 
   const unsigned container_start_offset =
       range.StartPosition().ComputeOffsetInContainerNode();
   const unsigned container_end_offset =
       range.EndPosition().ComputeOffsetInContainerNode();
 
   bool marker_found = false;
   for (Node& node : range.Nodes()) {
     int start_offset = node == start_container ? container_start_offset : 0;
     int end_offset = node == end_container ? container_end_offset : INT_MAX;
+

[Xiaocheng, 2017/04/17 06:49:29]

nit: remove this extra blank line

[yosin_UTC9, 2017/04/17 06:59:01]

nit: We don't need to have this extra blank line.

     marker_found |= SetMarkersActive(&node, start_offset, end_offset, active);
   }
   return marker_found;
 }
 
 bool DocumentMarkerController::SetMarkersActive(Node* node,
                                                 unsigned start_offset,
                                                 unsigned end_offset,
                                                 bool active) {
   MarkerLists* markers = markers_.at(node);
@@ skipping 71 matching lines @@
 
   MarkerLists* markers = markers_.at(node);
   if (!markers)
     return;
 
   bool did_shift_marker = false;
   for (MarkerList* list : *markers) {
     if (!list)
       continue;
 
-    for (MarkerList::iterator it = list->begin(); it != list->end(); ++it) {
-      RenderedDocumentMarker& marker = **it;
-      Optional<DocumentMarker::MarkerOffsets> result =
-          marker.ComputeOffsetsAfterShift(offset, old_length, new_length);
-      if (result == WTF::kNullopt) {
-        list->erase(it - list->begin());
-        --it;
-        did_shift_marker = true;
-        continue;
-      }
-
-      if (marker.StartOffset() != result.value().start_offset ||
-          marker.EndOffset() != result.value().end_offset) {
-        did_shift_marker = true;
-        marker.SetStartOffset(result.value().start_offset);
-        marker.SetEndOffset(result.value().end_offset);
-      }
-    }
+    if (DocumentMarkerListEditor::ShiftMarkers(list, offset, old_length,
+                                               new_length))
+      did_shift_marker = true;
   }
 
   if (!did_shift_marker)
     return;
   if (!node->GetLayoutObject())
     return;
   InvalidateRectsForMarkersInNode(*node);
   // repaint the affected node
   node->GetLayoutObject()->SetShouldDoFullPaintInvalidation();
 }
 
+// TODO(rlanday): move DocumentMarkerListEditor into its own .h/.cpp files
+bool DocumentMarkerListEditor::ShiftMarkers(MarkerList* list,
+                                            unsigned offset,
+                                            unsigned old_length,
+                                            unsigned new_length) {
+  bool did_shift_marker = false;
+  for (MarkerList::iterator it = list->begin(); it != list->end(); ++it) {
+    RenderedDocumentMarker& marker = **it;
+    Optional<DocumentMarker::MarkerOffsets> result =
+        marker.ComputeOffsetsAfterShift(offset, old_length, new_length);
+    if (result == WTF::kNullopt) {
+      list->erase(it - list->begin());
+      --it;
+      did_shift_marker = true;
+      continue;
+    }
+
+    if (marker.StartOffset() != result.value().start_offset ||
+        marker.EndOffset() != result.value().end_offset) {
+      did_shift_marker = true;
+      marker.SetStartOffset(result.value().start_offset);
+      marker.SetEndOffset(result.value().end_offset);
+    }
+  }
+
+  return did_shift_marker;
+}
+
 }  // namespace blink
 
 #ifndef NDEBUG
 void showDocumentMarkers(const blink::DocumentMarkerController* controller) {
   if (controller)
     controller->ShowMarkers();
 }
 #endif