Move ShellWindowGeometryCache into apps

BUG=159366

Review URL: https://chromiumcodereview.appspot.com/14636012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@200770 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 275 insertions, 0 deletions

diff --git a/apps/shell_window_geometry_cache.cc b/apps/shell_window_geometry_cache.cc
new file mode 100644
index 0000000..8a785b8
--- /dev/null
+++ b/apps/shell_window_geometry_cache.cc
@@ -0,0 +1,275 @@
+// 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 "apps/shell_window_geometry_cache.h"
+
+#include "base/bind.h"
+#include "base/stl_util.h"
+#include "base/strings/string_number_conversions.h"
+#include "chrome/browser/extensions/extension_prefs.h"
+#include "chrome/browser/extensions/extension_prefs_factory.h"
+#include "chrome/browser/profiles/incognito_helpers.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_dependency_manager.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/extensions/extension.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_types.h"
+
+namespace {
+
+// The timeout in milliseconds before we'll persist window geometry to the
+// StateStore.
+const int kSyncTimeoutMilliseconds = 1000;
+
+} // namespace
+
+namespace apps {
+
+ShellWindowGeometryCache::ShellWindowGeometryCache(
+    Profile* profile, extensions::ExtensionPrefs* prefs)
+    : prefs_(prefs),
+      sync_delay_(base::TimeDelta::FromMilliseconds(kSyncTimeoutMilliseconds)) {
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
+                 content::Source<Profile>(profile));
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
+                 content::Source<Profile>(profile));
+}
+
+ShellWindowGeometryCache::~ShellWindowGeometryCache() {
+}
+
+// static
+ShellWindowGeometryCache* ShellWindowGeometryCache::Get(
+    content::BrowserContext* context) {
+  return Factory::GetForContext(context, true /* create */);
+}
+
+void ShellWindowGeometryCache::SaveGeometry(
+    const std::string& extension_id,
+    const std::string& window_id,
+    const gfx::Rect& bounds,
+    ui::WindowShowState window_state) {
+  ExtensionData& extension_data = cache_[extension_id];
+
+  // If we don't have any unsynced changes and this is a duplicate of what's
+  // already in the cache, just ignore it.
+  if (extension_data[window_id].bounds == bounds &&
+      extension_data[window_id].window_state == window_state &&
+      !ContainsKey(unsynced_extensions_, extension_id))
+    return;
+
+  base::Time now = base::Time::Now();
+
+  extension_data[window_id].bounds = bounds;
+  extension_data[window_id].window_state = window_state;
+  extension_data[window_id].last_change = now;
+
+  if (extension_data.size() > kMaxCachedWindows) {
+    ExtensionData::iterator oldest = extension_data.end();
+    // Too many windows in the cache, find the oldest one to remove.
+    for (ExtensionData::iterator it = extension_data.begin();
+         it != extension_data.end(); ++it) {
+      // Don't expunge the window that was just added.
+      if (it->first == window_id) continue;
+
+      // If time is in the future, reset it to now to minimize weirdness.
+      if (it->second.last_change > now)
+        it->second.last_change = now;
+
+      if (oldest == extension_data.end() ||
+          it->second.last_change < oldest->second.last_change)
+        oldest = it;
+    }
+    extension_data.erase(oldest);
+  }
+
+  unsynced_extensions_.insert(extension_id);
+
+  // We don't use Reset() because the timer may not yet be running.
+  // (In that case Stop() is a no-op.)
+  sync_timer_.Stop();
+  sync_timer_.Start(FROM_HERE, sync_delay_, this,
+                    &ShellWindowGeometryCache::SyncToStorage);
+}
+
+void ShellWindowGeometryCache::SyncToStorage() {
+  std::set<std::string> tosync;
+  tosync.swap(unsynced_extensions_);
+  for (std::set<std::string>::const_iterator it = tosync.begin(),
+      eit = tosync.end(); it != eit; ++it) {
+    const std::string& extension_id = *it;
+    const ExtensionData& extension_data = cache_[extension_id];
+
+    scoped_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
+    for (ExtensionData::const_iterator it = extension_data.begin(),
+         eit = extension_data.end(); it != eit; ++it) {
+      base::DictionaryValue* value = new base::DictionaryValue;
+      const gfx::Rect& bounds = it->second.bounds;
+      value->SetInteger("x", bounds.x());
+      value->SetInteger("y", bounds.y());
+      value->SetInteger("w", bounds.width());
+      value->SetInteger("h", bounds.height());
+      value->SetInteger("state", it->second.window_state);
+      value->SetString(
+          "ts", base::Int64ToString(it->second.last_change.ToInternalValue()));
+      dict->SetWithoutPathExpansion(it->first, value);
+    }
+    prefs_->SetGeometryCache(extension_id, dict.Pass());
+  }
+}
+
+bool ShellWindowGeometryCache::GetGeometry(
+    const std::string& extension_id,
+    const std::string& window_id,
+    gfx::Rect* bounds,
+    ui::WindowShowState* window_state) const {
+
+  std::map<std::string, ExtensionData>::const_iterator
+      extension_data_it = cache_.find(extension_id);
+
+  // Not in the map means loading data for the extension didn't finish yet.
+  if (extension_data_it == cache_.end())
+    return false;
+
+  ExtensionData::const_iterator window_data = extension_data_it->second.find(
+      window_id);
+
+  if (window_data == extension_data_it->second.end())
+    return false;
+
+  if (bounds)
+    *bounds = window_data->second.bounds;
+  if (window_state)
+    *window_state = window_data->second.window_state;
+  return true;
+}
+
+void ShellWindowGeometryCache::Shutdown() {
+  SyncToStorage();
+}
+
+void ShellWindowGeometryCache::Observe(
+    int type, const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_EXTENSION_LOADED: {
+      std::string extension_id =
+          content::Details<const extensions::Extension>(details).ptr()->id();
+      OnExtensionLoaded(extension_id);
+      break;
+    }
+    case chrome::NOTIFICATION_EXTENSION_UNLOADED: {
+      std::string extension_id =
+          content::Details<const extensions::UnloadedExtensionInfo>(details).
+              ptr()->extension->id();
+      OnExtensionUnloaded(extension_id);
+      break;
+    }
+    default:
+      NOTREACHED();
+      return;
+  }
+}
+
+void ShellWindowGeometryCache::SetSyncDelayForTests(int timeout_ms) {
+  sync_delay_ = base::TimeDelta::FromMilliseconds(timeout_ms);
+}
+
+void ShellWindowGeometryCache::OnExtensionLoaded(
+    const std::string& extension_id) {
+  ExtensionData& extension_data = cache_[extension_id];
+
+  const base::DictionaryValue* stored_windows =
+      prefs_->GetGeometryCache(extension_id);
+  if (!stored_windows)
+    return;
+
+  for (base::DictionaryValue::Iterator it(*stored_windows); !it.IsAtEnd();
+       it.Advance()) {
+    // If the cache already contains geometry for this window, don't
+    // overwrite that information since it is probably the result of an
+    // application starting up very quickly.
+    const std::string& window_id = it.key();
+    ExtensionData::iterator cached_window = extension_data.find(window_id);
+    if (cached_window == extension_data.end()) {
+      const base::DictionaryValue* stored_window;
+      if (it.value().GetAsDictionary(&stored_window)) {
+        WindowData& window_data = extension_data[it.key()];
+
+        int i;
+        if (stored_window->GetInteger("x", &i))
+          window_data.bounds.set_x(i);
+        if (stored_window->GetInteger("y", &i))
+          window_data.bounds.set_y(i);
+        if (stored_window->GetInteger("w", &i))
+          window_data.bounds.set_width(i);
+        if (stored_window->GetInteger("h", &i))
+          window_data.bounds.set_height(i);
+        if (stored_window->GetInteger("state", &i)) {
+          window_data.window_state =
+              static_cast<ui::WindowShowState>(i);
+        }
+        std::string ts_as_string;
+        if (stored_window->GetString("ts", &ts_as_string)) {
+          int64 ts;
+          if (base::StringToInt64(ts_as_string, &ts)) {
+            window_data.last_change = base::Time::FromInternalValue(ts);
+          }
+        }
+      }
+    }
+  }
+}
+
+void ShellWindowGeometryCache::OnExtensionUnloaded(
+    const std::string& extension_id) {
+  SyncToStorage();
+  cache_.erase(extension_id);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Factory boilerplate
+
+// static
+ShellWindowGeometryCache* ShellWindowGeometryCache::Factory::GetForContext(
+    content::BrowserContext* context, bool create) {
+  return static_cast<ShellWindowGeometryCache*>(
+      GetInstance()->GetServiceForProfile(context, create));
+}
+
+ShellWindowGeometryCache::Factory*
+ShellWindowGeometryCache::Factory::GetInstance() {
+  return Singleton<ShellWindowGeometryCache::Factory>::get();
+}
+
+ShellWindowGeometryCache::Factory::Factory()
+    : ProfileKeyedServiceFactory("ShellWindowGeometryCache",
+                                 ProfileDependencyManager::GetInstance()) {
+  DependsOn(extensions::ExtensionPrefsFactory::GetInstance());
+}
+
+ShellWindowGeometryCache::Factory::~Factory() {
+}
+
+ProfileKeyedService*
+ShellWindowGeometryCache::Factory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  Profile* profile = Profile::FromBrowserContext(context);
+  return new ShellWindowGeometryCache(
+      profile,
+      extensions::ExtensionPrefs::Get(profile));
+}
+
+bool ShellWindowGeometryCache::Factory::ServiceIsNULLWhileTesting() const {
+  return false;
+}
+
+content::BrowserContext*
+ShellWindowGeometryCache::Factory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return chrome::GetBrowserContextRedirectedInIncognito(context);
+}
+
+} // namespace apps