components: Create web_modal component.

chrome/browser/ui/web_contents_modal_dialog_manager.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/web_contents_modal_dialog_manager.h"
-
-#include "chrome/browser/ui/web_contents_modal_dialog_manager_delegate.h"
-#include "chrome/common/render_messages.h"
-#include "content/public/browser/navigation_details.h"
-#include "content/public/browser/navigation_entry.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_source.h"
-#include "content/public/browser/notification_types.h"
-#include "content/public/browser/render_view_host.h"
-#include "content/public/browser/web_contents.h"
-#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
-
-using content::WebContents;
-
-DEFINE_WEB_CONTENTS_USER_DATA_KEY(WebContentsModalDialogManager);
-
-WebContentsModalDialogManager::~WebContentsModalDialogManager() {
-  DCHECK(child_dialogs_.empty());
-}
-
-void WebContentsModalDialogManager::ShowDialog(
-    NativeWebContentsModalDialog dialog) {
-  child_dialogs_.push_back(dialog);
-
-  native_manager_->ManageDialog(dialog);
-
-  if (child_dialogs_.size() == 1) {
-    native_manager_->ShowDialog(dialog);
-    BlockWebContentsInteraction(true);
-  }
-}
-
-void WebContentsModalDialogManager::BlockWebContentsInteraction(bool blocked) {
-  WebContents* contents = web_contents();
-  if (!contents) {
-    // The WebContents has already disconnected.
-    return;
-  }
-
-  // RenderViewHost may be NULL during shutdown.
-  content::RenderViewHost* host = contents->GetRenderViewHost();
-  if (host) {
-    host->SetIgnoreInputEvents(blocked);
-    host->Send(new ChromeViewMsg_SetVisuallyDeemphasized(
-        host->GetRoutingID(), blocked));
-  }
-  if (delegate_)
-    delegate_->SetWebContentsBlocked(contents, blocked);
-}
-
-bool WebContentsModalDialogManager::IsShowingDialog() const {
-  return dialog_count() > 0;
-}
-
-void WebContentsModalDialogManager::FocusTopmostDialog() {
-  DCHECK(dialog_count());
-  native_manager_->FocusDialog(*dialog_begin());
-}
-
-content::WebContents* WebContentsModalDialogManager::GetWebContents() const {
-  return web_contents();
-}
-
-void WebContentsModalDialogManager::WillClose(
-    NativeWebContentsModalDialog dialog) {
-  WebContentsModalDialogList::iterator i(
-      std::find(child_dialogs_.begin(),
-                child_dialogs_.end(),
-                dialog));
-  bool removed_topmost_dialog = i == child_dialogs_.begin();
-  if (i != child_dialogs_.end())
-    child_dialogs_.erase(i);
-  if (child_dialogs_.empty()) {
-    BlockWebContentsInteraction(false);
-  } else {
-    if (removed_topmost_dialog && !closing_all_dialogs_)
-      native_manager_->ShowDialog(child_dialogs_[0]);
-    BlockWebContentsInteraction(true);
-  }
-}
-
-void WebContentsModalDialogManager::Observe(
-    int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  DCHECK(type == content::NOTIFICATION_WEB_CONTENTS_VISIBILITY_CHANGED);
-
-  if (child_dialogs_.empty())
-    return;
-
-  bool visible = *content::Details<bool>(details).ptr();
-  if (visible)
-    native_manager_->ShowDialog(child_dialogs_[0]);
-  else
-    native_manager_->HideDialog(child_dialogs_[0]);
-}
-
-WebContentsModalDialogManager::WebContentsModalDialogManager(
-    content::WebContents* web_contents)
-    : content::WebContentsObserver(web_contents),
-      delegate_(NULL),
-      native_manager_(CreateNativeManager(this)),
-      closing_all_dialogs_(false) {
-  DCHECK(native_manager_);
-  registrar_.Add(this,
-                 content::NOTIFICATION_WEB_CONTENTS_VISIBILITY_CHANGED,
-                 content::Source<content::WebContents>(web_contents));
-}
-
-void WebContentsModalDialogManager::CloseAllDialogs() {
-  closing_all_dialogs_ = true;
-
-  // Clear out any dialogs since we are leaving this page entirely.  To ensure
-  // that we iterate over every element in child_dialogs_ we need to use a copy
-  // of child_dialogs_. Otherwise if closing a dialog causes child_dialogs_ to
-  // be modified, we could end up skipping some elements.
-  WebContentsModalDialogList child_dialogs_copy(child_dialogs_);
-  for (WebContentsModalDialogList::iterator it = child_dialogs_copy.begin();
-       it != child_dialogs_copy.end(); ++it) {
-    native_manager_->CloseDialog(*it);
-    BlockWebContentsInteraction(false);
-  }
-
-  closing_all_dialogs_ = false;
-}
-
-void WebContentsModalDialogManager::DidNavigateMainFrame(
-    const content::LoadCommittedDetails& details,
-    const content::FrameNavigateParams& params) {
-  // Close constrained windows if necessary.
-  if (!net::RegistryControlledDomainService::SameDomainOrHost(
-          details.previous_url, details.entry->GetURL()))
-    CloseAllDialogs();
-}
-
-void WebContentsModalDialogManager::DidGetIgnoredUIEvent() {
-  if (dialog_count())
-    native_manager_->FocusDialog(*dialog_begin());
-}
-
-void WebContentsModalDialogManager::WebContentsDestroyed(WebContents* tab) {
-  // First cleanly close all child dialogs.
-  // TODO(mpcomplete): handle case if MaybeCloseChildWindows() already asked
-  // some of these to close.  CloseAllDialogs is async, so it might get called
-  // twice before it runs.
-  CloseAllDialogs();
-}