Move Instant stuff off Browser.

chrome/browser/ui/browser_instant_controller.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/browser_instant_controller.h"
+
+#include "chrome/browser/browser_shutdown.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/instant/instant_controller.h"
+#include "chrome/browser/instant/instant_unload_handler.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_tabstrip.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/omnibox/location_bar.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/browser/ui/tab_contents/tab_contents.h"
+#include "chrome/browser/ui/webui/ntp/app_launcher_handler.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/pref_names.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_source.h"
+#include "content/public/browser/web_contents.h"
+
+
+namespace chrome {
+
+////////////////////////////////////////////////////////////////////////////////
+// BrowserInstantController, public:
+
+BrowserInstantController::BrowserInstantController(Browser* browser)
+    : browser_(browser) {
+  profile_pref_registrar_.Init(browser_->profile()->GetPrefs());
+  profile_pref_registrar_.Add(prefs::kInstantEnabled, this);
+  CreateInstantIfNecessary();
+  browser_->tab_strip_model()->AddObserver(this);
+}
+
+BrowserInstantController::~BrowserInstantController() {
+  browser_->tab_strip_model()->RemoveObserver(this);
+}
+
+bool BrowserInstantController::OpenInstant(WindowOpenDisposition disposition) {
+  if (!instant() || !instant()->PrepareForCommit() ||
+      disposition == NEW_BACKGROUND_TAB) {
+    // NEW_BACKGROUND_TAB results in leaving the omnibox open, so we don't
+    // attempt to use the instant preview.
+    return false;
+  }
+
+  if (disposition == CURRENT_TAB) {
+    content::NotificationService::current()->Notify(
+        chrome::NOTIFICATION_INSTANT_COMMITTED,
+        content::Source<TabContents>(instant()->CommitCurrentPreview(
+            INSTANT_COMMIT_PRESSED_ENTER)),
+        content::NotificationService::NoDetails());
+    return true;
+  }
+  if (disposition == NEW_FOREGROUND_TAB) {
+    TabContents* preview_contents = instant()->ReleasePreviewContents(
+        INSTANT_COMMIT_PRESSED_ENTER, NULL);
+    // HideInstant is invoked after release so that InstantController is not
+    // active when HideInstant asks it for its state.
+    HideInstant();
+    preview_contents->web_contents()->GetController().PruneAllButActive();
+    browser_->tab_strip_model()->AddTabContents(
+        preview_contents,
+        -1,
+        instant()->last_transition_type(),
+        TabStripModel::ADD_ACTIVE);
+    instant()->CompleteRelease(preview_contents);
+    content::NotificationService::current()->Notify(
+        chrome::NOTIFICATION_INSTANT_COMMITTED,
+        content::Source<TabContents>(preview_contents),
+        content::NotificationService::NoDetails());
+    return true;
+  }
+  // The omnibox currently doesn't use other dispositions, so we don't attempt
+  // to handle them. If you hit this NOTREACHED file a bug and I'll (sky) add
+  // support for the new disposition.
+  NOTREACHED();
+  return false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// BrowserInstantController, InstantControllerDelegate implementation:
+
+void BrowserInstantController::ShowInstant(TabContents* preview_contents) {
+  browser_->window()->ShowInstant(preview_contents);
+
+  // TODO(beng): investigate if we can avoid this and instead rely on the
+  //             visibility of the WebContentsView
+  chrome::GetActiveWebContents(browser_)->WasHidden();
+  preview_contents->web_contents()->WasRestored();
+}
+
+void BrowserInstantController::HideInstant() {
+  browser_->window()->HideInstant();
+  if (chrome::GetActiveWebContents(browser_))
+    chrome::GetActiveWebContents(browser_)->WasRestored();
+  if (instant_->GetPreviewContents())
+    instant_->GetPreviewContents()->web_contents()->WasHidden();
+}
+
+void BrowserInstantController::CommitInstant(TabContents* preview_contents) {
+  TabContents* tab_contents = chrome::GetActiveTabContents(browser_);
+  int index = browser_->tab_strip_model()->GetIndexOfTabContents(tab_contents);
+  DCHECK_NE(TabStripModel::kNoTab, index);
+  // TabStripModel takes ownership of preview_contents.
+  browser_->tab_strip_model()->ReplaceTabContentsAt(index, preview_contents);
+  // InstantUnloadHandler takes ownership of tab_contents.
+  instant_unload_handler_->RunUnloadListenersOrDestroy(tab_contents, index);
+
+  GURL url = preview_contents->web_contents()->GetURL();
+  DCHECK(browser_->profile()->GetExtensionService());
+  if (browser_->profile()->GetExtensionService()->IsInstalledApp(url)) {
+    AppLauncherHandler::RecordAppLaunchType(
+        extension_misc::APP_LAUNCH_OMNIBOX_INSTANT);
+  }
+}
+
+void BrowserInstantController::SetSuggestedText(
+    const string16& text,
+    InstantCompleteBehavior behavior) {
+  if (browser_->window()->GetLocationBar())
+    browser_->window()->GetLocationBar()->SetSuggestedText(text, behavior);
+}
+
+gfx::Rect BrowserInstantController::GetInstantBounds() {
+  return browser_->window()->GetInstantBounds();
+}
+
+void BrowserInstantController::InstantPreviewFocused() {
+  // NOTE: This is only invoked on aura.
+  browser_->window()->WebContentsFocused(
+      instant_->GetPreviewContents()->web_contents());
+}
+
+TabContents* BrowserInstantController::GetInstantHostTabContents() const {
+  return chrome::GetActiveTabContents(browser_);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// BrowserInstantController, content::NotificationObserver implementation:
+
+void BrowserInstantController::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  DCHECK(type == chrome::NOTIFICATION_PREF_CHANGED);
+  const std::string& pref_name =
+      *content::Details<std::string>(details).ptr();
+  DCHECK(pref_name == prefs::kInstantEnabled);
+  if (browser_shutdown::ShuttingDownWithoutClosingBrowsers() ||
+      !InstantController::IsEnabled(browser_->profile())) {
+    if (instant()) {
+      instant()->DestroyPreviewContents();
+      instant_.reset();
+      instant_unload_handler_.reset();
+    }
+  } else {
+    CreateInstantIfNecessary();
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// BrowserInstantController, TabStripModelObserver implementation:
+
+void BrowserInstantController::TabDeactivated(TabContents* contents) {
+  if (instant())
+    instant()->Hide();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// BrowserInstantController, private:
+
+void BrowserInstantController::CreateInstantIfNecessary() {
+  if (browser_->is_type_tabbed() &&
+      InstantController::IsEnabled(browser_->profile()) &&
+      !browser_->profile()->IsOffTheRecord()) {
+    instant_.reset(new InstantController(this, InstantController::INSTANT));
+    instant_unload_handler_.reset(new InstantUnloadHandler(browser_));
+  }
+}
+
+}  // namespace chrome