DevTools: place DevTools WebContents underneath inspected WebContents.

chrome/browser/ui/views/frame/contents_layout_manager.cc

+// Copyright 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 "chrome/browser/ui/views/frame/contents_layout_manager.h"
+
+#include "ui/views/view.h"
+
+ContentsLayoutManager::ContentsLayoutManager(
+    views::View* devtools_view,
+    views::View* contents_view)
+    : devtools_view_(devtools_view),
+      contents_view_(contents_view),
+      host_(NULL),
+      active_top_margin_(0) {
+}
+
+ContentsLayoutManager::~ContentsLayoutManager() {
+}
+
+void ContentsLayoutManager::SetContentsViewInsets(const gfx::Insets& insets) {
+  if (insets_ == insets)
+    return;
+
+  insets_ = insets;
+  if (host_)
+    host_->InvalidateLayout();
+}
+
+void ContentsLayoutManager::SetActiveTopMargin(int margin) {
+  if (active_top_margin_ == margin)
+    return;
+
+  active_top_margin_ = margin;
+  if (host_)
+    host_->InvalidateLayout();
+}
+
+void ContentsLayoutManager::Layout(views::View* contents_container) {
+  DCHECK(host_ == contents_container);
+
+  int top = active_top_margin_;
+  int height = std::max(0, contents_container->height() - top);
+  int width = contents_container->width();
+  devtools_view_->SetBounds(0, top, width, height);
+
+  int contents_width = std::max(0, width - insets_.width());
+  int contents_height = std::max(0, height - insets_.height());
+  contents_view_->SetBounds(
+      std::min(insets_.left(), width),
+      top + std::min(insets_.top(), height),
+      contents_width,
+      contents_height);
+}
+
+gfx::Size ContentsLayoutManager::GetPreferredSize(views::View* host) {
+  return gfx::Size();
+}
+
+void ContentsLayoutManager::Installed(views::View* host) {
+  DCHECK(!host_);
+  host_ = host;
+}
+
+void ContentsLayoutManager::Uninstalled(views::View* host) {
+  DCHECK(host_ == host);
+  host_ = NULL;
+}