Implementing directional text selection handles

ui/base/touch/touch_editing_controller.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/touch/touch_editing_controller.h"
 
 namespace ui {
 
 namespace {
 TouchSelectionControllerFactory* g_shared_instance = NULL;
 }  // namespace
 
+SelectionBound::SelectionBound()
+    : type(ui::SelectionBound::EMPTY) {
+}
+
+SelectionBound::~SelectionBound() {
+}
+
+int SelectionBound::GetHeight() const {
+  return edge_bottom.y() - edge_top.y();
+}
+
+bool operator==(const SelectionBound& lhs, const SelectionBound& rhs) {
+  return lhs.type == rhs.type && lhs.edge_top == rhs.edge_top &&
+         lhs.edge_bottom == rhs.edge_bottom;
+}
+
+bool operator!=(const SelectionBound& lhs, const SelectionBound& rhs) {
+  return !(lhs == rhs);
+}
+
+gfx::Rect RectBetweenSelectionBounds(const SelectionBound& b1,
+                               const SelectionBound& b2) {

[mohsen, 2014/11/07 16:52:27]

Can you rewrite this for general case (where handle is not necessarily
vertical)? (probably using gfx::BoundingRect())

[mfomitchev, 2014/11/10 04:04:12]

Done.

+  int left = std::min(b1.edge_top.x(), b2.edge_top.x());
+  int top = std::min(b1.edge_top.y(), b2.edge_top.y());
+  int right = std::max(b1.edge_top.x(), b2.edge_top.x());
+  int bottom = std::max(b1.edge_bottom.y(), b2.edge_bottom.y());
+
+  return gfx::Rect(left, top, right - left, bottom - top);
+}
+
 TouchSelectionController* TouchSelectionController::create(
     TouchEditable* client_view) {
   if (g_shared_instance)
     return g_shared_instance->create(client_view);
   return NULL;
 }
 
 // static
 void TouchSelectionControllerFactory::SetInstance(
     TouchSelectionControllerFactory* instance) {
   g_shared_instance = instance;
 }
 
 }  // namespace ui