Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/docked_panel_drag_handler.cc

-// Copyright (c) 2012 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 "chrome/browser/ui/panels/docked_panel_drag_handler.h"
-
-#include "chrome/browser/ui/panels/docked_panel_collection.h"
-#include "chrome/browser/ui/panels/panel.h"
-#include "chrome/browser/ui/panels/panel_manager.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-
-// static
-void DockedPanelDragHandler::HandleDrag(Panel* panel,
-                                        const gfx::Point& target_position) {
-  DCHECK_EQ(PanelCollection::DOCKED, panel->collection()->type());
-
-  DockedPanelCollection* collection =
-      static_cast<DockedPanelCollection*>(panel->collection());
-
-  // Moves this panel to the dragging position.
-  // Note that we still allow the panel to be moved vertically until it gets
-  // aligned to the bottom area.
-  gfx::Rect new_bounds(panel->GetBounds());
-  new_bounds.set_x(target_position.x());
-  int delta_x = new_bounds.x() - panel->GetBounds().x();
-  int bottom = collection->GetBottomPositionForExpansionState(
-      panel->expansion_state());
-  if (new_bounds.bottom() != bottom) {
-    new_bounds.set_y(target_position.y());
-    if (new_bounds.bottom() > bottom)
-      new_bounds.set_y(bottom - new_bounds.height());
-  }
-  panel->SetPanelBoundsInstantly(new_bounds);
-
-  if (delta_x) {
-    // Checks and processes other affected panels.
-    if (delta_x > 0)
-      DragRight(panel);
-    else
-      DragLeft(panel);
-
-    // Layout refresh will automatically recompute the bounds of all affected
-    // panels due to their position changes.
-    collection->RefreshLayout();
-  }
-}
-
-// static
-void DockedPanelDragHandler::DragLeft(Panel* panel) {
-  DockedPanelCollection* collection =
-      static_cast<DockedPanelCollection*>(panel->collection());
-
-  // This is the left corner of the dragging panel. We use it to check against
-  // all the panels on its left.
-  int dragging_panel_left_boundary = panel->GetBounds().x();
-
-  // Checks the panels to the left of the dragging panel.
-  DockedPanelCollection::Panels::iterator dragging_panel_iterator =
-      find(collection->panels_.begin(), collection->panels_.end(), panel);
-  DockedPanelCollection::Panels::iterator current_panel_iterator =
-      dragging_panel_iterator;
-  ++current_panel_iterator;
-  for (; current_panel_iterator != collection->panels_.end();
-       ++current_panel_iterator) {
-    Panel* current_panel = *current_panel_iterator;
-
-    // Can we swap dragging panel with its left panel? The criterion is that
-    // the left corner of dragging panel should pass the middle position of
-    // its left panel.
-    if (dragging_panel_left_boundary > current_panel->GetBounds().x() +
-            current_panel->GetBounds().width() / 2)
-      break;
-
-    // Swaps the contents and makes |dragging_panel_iterator| refers to the new
-    // position.
-    *dragging_panel_iterator = current_panel;
-    *current_panel_iterator = panel;
-    dragging_panel_iterator = current_panel_iterator;
-  }
-}
-
-// static
-void DockedPanelDragHandler::DragRight(Panel* panel) {
-  DockedPanelCollection* collection =
-      static_cast<DockedPanelCollection*>(panel->collection());
-
-  // This is the right corner of the dragging panel. We use it to check against
-  // all the panels on its right.
-  int dragging_panel_right_boundary = panel->GetBounds().x() +
-      panel->GetBounds().width() - 1;
-
-  // Checks the panels to the right of the dragging panel.
-  DockedPanelCollection::Panels::iterator dragging_panel_iterator =
-      find(collection->panels_.begin(), collection->panels_.end(), panel);
-  DockedPanelCollection::Panels::iterator current_panel_iterator =
-      dragging_panel_iterator;
-  while (current_panel_iterator != collection->panels_.begin()) {
-    current_panel_iterator--;
-    Panel* current_panel = *current_panel_iterator;
-
-    // Can we swap dragging panel with its right panel? The criterion is that
-    // the left corner of dragging panel should pass the middle position of
-    // its right panel.
-    if (dragging_panel_right_boundary < current_panel->GetBounds().x() +
-            current_panel->GetBounds().width() / 2)
-      break;
-
-    // Swaps the contents and makes |dragging_panel_iterator| refers to the new
-    // position.
-    *dragging_panel_iterator = current_panel;
-    *current_panel_iterator = panel;
-    dragging_panel_iterator = current_panel_iterator;
-  }
-}