content: Move constrained window code from TabContents to TabContentsWrapper

chrome/browser/ui/constrained_window_tab_helper.cc

+// Copyright (c) 2011 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/constrained_window_tab_helper.h"
+
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper_delegate.h"
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/renderer_host/render_widget_host_view.h"
+#include "content/browser/tab_contents/navigation_details.h"
+#include "net/base/registry_controlled_domain.h"
+
+ConstrainedWindowTabHelper::ConstrainedWindowTabHelper(
+    TabContentsWrapper* wrapper)
+    : TabContentsObserver(wrapper->tab_contents()),
+      wrapper_(wrapper) {
+}
+
+ConstrainedWindowTabHelper::~ConstrainedWindowTabHelper() {
+  DCHECK(child_windows_.empty());
+}
+
+void ConstrainedWindowTabHelper::AddConstrainedDialog(
+    ConstrainedWindow* window) {
+  child_windows_.push_back(window);
+
+  if (child_windows_.size() == 1) {
+    window->ShowConstrainedWindow();
+    BlockTabContent(true);
+  }
+}
+
+void ConstrainedWindowTabHelper::CloseConstrainedWindows() {
+  // Clear out any constrained windows since we are leaving this page entirely.
+  // To ensure that we iterate over every element in child_windows_ we
+  // need to use a copy of child_windows_. Otherwise if
+  // window->CloseConstrainedWindow() modifies child_windows_ we could end up
+  // skipping some elements.
+  ConstrainedWindowList child_windows_copy(child_windows_);
+  for (ConstrainedWindowList::iterator it = child_windows_copy.begin();
+       it != child_windows_copy.end(); ++it) {
+    ConstrainedWindow* window = *it;
+    if (window) {
+      window->CloseConstrainedWindow();
+      BlockTabContent(false);
+    }
+  }
+}
+
+void ConstrainedWindowTabHelper::WillClose(ConstrainedWindow* window) {
+  ConstrainedWindowList::iterator i(
+      std::find(child_windows_.begin(), child_windows_.end(), window));
+  bool removed_topmost_window = i == child_windows_.begin();
+  if (i != child_windows_.end())
+    child_windows_.erase(i);
+  if (child_windows_.empty()) {
+    BlockTabContent(false);
+  } else {
+    if (removed_topmost_window)
+      child_windows_[0]->ShowConstrainedWindow();
+    BlockTabContent(true);
+  }
+}
+
+void ConstrainedWindowTabHelper::BlockTabContent(bool blocked) {
+  TabContents* contents = tab_contents();
+  if (!contents) {
+    // The TabContents has already disconnected.
+    return;
+  }
+
+  RenderWidgetHostView* rwhv = contents->GetRenderWidgetHostView();
+  // 70% opaque grey.
+  SkColor greyish = SkColorSetARGB(178, 0, 0, 0);
+  if (rwhv)
+    rwhv->SetVisuallyDeemphasized(blocked ? &greyish : NULL, false);
+  // RenderViewHost may be NULL during shutdown.
+  if (contents->render_view_host())
+    contents->render_view_host()->set_ignore_input_events(blocked);
+  if (wrapper_->delegate())
+    wrapper_->delegate()->SetTabContentBlocked(wrapper_, blocked);
+}
+
+void ConstrainedWindowTabHelper::DidNavigateMainFramePostCommit(
+    const content::LoadCommittedDetails& details,
+    const ViewHostMsg_FrameNavigate_Params& params) {
+  // Close constrained windows if necessary.
+  if (!net::RegistryControlledDomainService::SameDomainOrHost(
+          details.previous_url, details.entry->url()))
+    CloseConstrainedWindows();
+}
+
+void ConstrainedWindowTabHelper::DidGetIgnoredUIEvent() {
+  if (constrained_window_count()) {
+    ConstrainedWindow* window = *constrained_window_begin();
+    window->FocusConstrainedWindow();
+  }
+}
+
+void ConstrainedWindowTabHelper::TabContentsDestroyed(TabContents* tab) {
+  // First cleanly close all child windows.
+  // TODO(mpcomplete): handle case if MaybeCloseChildWindows() already asked
+  // some of these to close.  CloseWindows is async, so it might get called
+  // twice before it runs.
+  CloseConstrainedWindows();
+}