extensions/browser/app_window/app_window_geometry_cache.cc - chromium/src - Git at Google

 // Copyright 2014 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 "extensions/browser/app_window/app_window_geometry_cache.h"

 #include <stdint.h>

 #include <utility>

 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/extension_prefs_factory.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extensions_browser_client.h"
 #include "extensions/common/extension.h"

 namespace {

 // The timeout in milliseconds before we'll persist window geometry to the
 // StateStore.
 const int kSyncTimeoutMilliseconds = 1000;

 }  // namespace

 namespace extensions {

 AppWindowGeometryCache::AppWindowGeometryCache(content::BrowserContext* context,
                                                ExtensionPrefs* prefs)
     : prefs_(prefs),
       sync_delay_(base::TimeDelta::FromMilliseconds(kSyncTimeoutMilliseconds)),
       extension_registry_observer_(this) {
   extension_registry_observer_.Add(ExtensionRegistry::Get(context));
 }

 AppWindowGeometryCache::~AppWindowGeometryCache() {}

 // static
 AppWindowGeometryCache* AppWindowGeometryCache::Get(
     content::BrowserContext* context) {
   return Factory::GetForContext(context, true /* create */);
 }

 void AppWindowGeometryCache::SaveGeometry(const std::string& extension_id,
                                           const std::string& window_id,
                                           const gfx::Rect& bounds,
                                           const gfx::Rect& screen_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 &&
       extension_data[window_id].screen_bounds == screen_bounds &&
       !base::ContainsKey(unsynced_extensions_, extension_id))
     return;

   base::Time now = base::Time::Now();

   extension_data[window_id].bounds = bounds;
   extension_data[window_id].screen_bounds = screen_bounds;
   extension_data[window_id].window_state = window_state;
   extension_data[window_id].last_change = now;

   if (extension_data.size() > kMaxCachedWindows) {
     auto oldest = extension_data.end();
     // Too many windows in the cache, find the oldest one to remove.
     for (auto 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, &AppWindowGeometryCache::SyncToStorage);
 }

 void AppWindowGeometryCache::SyncToStorage() {
   std::set<std::string> tosync;
   tosync.swap(unsynced_extensions_);
   for (auto it = tosync.cbegin(), eit = tosync.cend(); it != eit; ++it) {
     const std::string& extension_id = *it;
     const ExtensionData& extension_data = cache_[extension_id];

     std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
     for (auto it = extension_data.cbegin(), eit = extension_data.cend();
          it != eit; ++it) {
       std::unique_ptr<base::DictionaryValue> value =
           std::make_unique<base::DictionaryValue>();
       const gfx::Rect& bounds = it->second.bounds;
       const gfx::Rect& screen_bounds = it->second.screen_bounds;
       DCHECK(!bounds.IsEmpty());
       DCHECK(!screen_bounds.IsEmpty());
       DCHECK(it->second.window_state != ui::SHOW_STATE_DEFAULT);
       value->SetInteger("x", bounds.x());
       value->SetInteger("y", bounds.y());
       value->SetInteger("w", bounds.width());
       value->SetInteger("h", bounds.height());
       value->SetInteger("screen_bounds_x", screen_bounds.x());
       value->SetInteger("screen_bounds_y", screen_bounds.y());
       value->SetInteger("screen_bounds_w", screen_bounds.width());
       value->SetInteger("screen_bounds_h", screen_bounds.height());
       value->SetInteger("state", it->second.window_state);
       value->SetString(
           "ts", base::Int64ToString(it->second.last_change.ToInternalValue()));
       dict->SetWithoutPathExpansion(it->first, std::move(value));

       for (auto& observer : observers_)
         observer.OnGeometryCacheChanged(extension_id, it->first, bounds);
     }

     prefs_->SetGeometryCache(extension_id, std::move(dict));
   }
 }

 bool AppWindowGeometryCache::GetGeometry(const std::string& extension_id,
                                          const std::string& window_id,
                                          gfx::Rect* bounds,
                                          gfx::Rect* screen_bounds,
                                          ui::WindowShowState* window_state) {
   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 or
   // the cache was not constructed until after the extension was loaded.
   // Attempt to load from sync to address the latter case.
   if (extension_data_it == cache_.end()) {
     LoadGeometryFromStorage(extension_id);
     extension_data_it = cache_.find(extension_id);
     DCHECK(extension_data_it != cache_.end());
   }

   auto window_data_it = extension_data_it->second.find(window_id);

   if (window_data_it == extension_data_it->second.end())
     return false;

   const WindowData& window_data = window_data_it->second;

   // Check for and do not return corrupt data.
   if ((bounds && window_data.bounds.IsEmpty()) ||
       (screen_bounds && window_data.screen_bounds.IsEmpty()) ||
       (window_state && window_data.window_state == ui::SHOW_STATE_DEFAULT))
     return false;

   if (bounds)
     *bounds = window_data.bounds;
   if (screen_bounds)
     *screen_bounds = window_data.screen_bounds;
   if (window_state)
     *window_state = window_data.window_state;
   return true;
 }

 void AppWindowGeometryCache::Shutdown() { SyncToStorage(); }

 AppWindowGeometryCache::WindowData::WindowData()
     : window_state(ui::SHOW_STATE_DEFAULT) {}

 AppWindowGeometryCache::WindowData::~WindowData() {}

 void AppWindowGeometryCache::OnExtensionLoaded(
     content::BrowserContext* browser_context,
     const Extension* extension) {
   LoadGeometryFromStorage(extension->id());
 }

 void AppWindowGeometryCache::OnExtensionUnloaded(
     content::BrowserContext* browser_context,
     const Extension* extension,
     UnloadedExtensionReason reason) {
   SyncToStorage();
   cache_.erase(extension->id());
 }

 void AppWindowGeometryCache::SetSyncDelayForTests(int timeout_ms) {
   sync_delay_ = base::TimeDelta::FromMilliseconds(timeout_ms);
 }

 void AppWindowGeometryCache::LoadGeometryFromStorage(
     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();
     auto 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("screen_bounds_x", &i))
           window_data.screen_bounds.set_x(i);
         if (stored_window->GetInteger("screen_bounds_y", &i))
           window_data.screen_bounds.set_y(i);
         if (stored_window->GetInteger("screen_bounds_w", &i))
           window_data.screen_bounds.set_width(i);
         if (stored_window->GetInteger("screen_bounds_h", &i))
           window_data.screen_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_t ts;
           if (base::StringToInt64(ts_as_string, &ts)) {
             window_data.last_change = base::Time::FromInternalValue(ts);
           }
         }
       }
     }
   }
 }

 ///////////////////////////////////////////////////////////////////////////////
 // Factory boilerplate

 // static
 AppWindowGeometryCache* AppWindowGeometryCache::Factory::GetForContext(
     content::BrowserContext* context,
     bool create) {
   return static_cast<AppWindowGeometryCache*>(
       GetInstance()->GetServiceForBrowserContext(context, create));
 }

 AppWindowGeometryCache::Factory*
 AppWindowGeometryCache::Factory::GetInstance() {
   return base::Singleton<AppWindowGeometryCache::Factory>::get();
 }

 AppWindowGeometryCache::Factory::Factory()
     : BrowserContextKeyedServiceFactory(
           "AppWindowGeometryCache",
           BrowserContextDependencyManager::GetInstance()) {
   DependsOn(ExtensionPrefsFactory::GetInstance());
 }

 AppWindowGeometryCache::Factory::~Factory() {}

 KeyedService* AppWindowGeometryCache::Factory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return new AppWindowGeometryCache(context, ExtensionPrefs::Get(context));
 }

 bool AppWindowGeometryCache::Factory::ServiceIsNULLWhileTesting() const {
   return false;
 }

 content::BrowserContext*
 AppWindowGeometryCache::Factory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
 }

 void AppWindowGeometryCache::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }

 void AppWindowGeometryCache::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }

 }  // namespace extensions
	// Copyright 2014 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 "extensions/browser/app_window/app_window_geometry_cache.h"

	#include <stdint.h>

	#include <utility>

	#include "base/bind.h"
	#include "base/stl_util.h"
	#include "base/strings/string_number_conversions.h"
	#include "components/keyed_service/content/browser_context_dependency_manager.h"
	#include "extensions/browser/extension_prefs.h"
	#include "extensions/browser/extension_prefs_factory.h"
	#include "extensions/browser/extension_registry.h"
	#include "extensions/browser/extensions_browser_client.h"
	#include "extensions/common/extension.h"

	namespace {

	// The timeout in milliseconds before we'll persist window geometry to the
	// StateStore.
	const int kSyncTimeoutMilliseconds = 1000;

	} // namespace

	namespace extensions {

	AppWindowGeometryCache::AppWindowGeometryCache(content::BrowserContext* context,
	ExtensionPrefs* prefs)
	: prefs_(prefs),
	sync_delay_(base::TimeDelta::FromMilliseconds(kSyncTimeoutMilliseconds)),
	extension_registry_observer_(this) {
	extension_registry_observer_.Add(ExtensionRegistry::Get(context));
	}

	AppWindowGeometryCache::~AppWindowGeometryCache() {}

	// static
	AppWindowGeometryCache* AppWindowGeometryCache::Get(
	content::BrowserContext* context) {
	return Factory::GetForContext(context, true /* create */);
	}

	void AppWindowGeometryCache::SaveGeometry(const std::string& extension_id,
	const std::string& window_id,
	const gfx::Rect& bounds,
	const gfx::Rect& screen_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 &&
	extension_data[window_id].screen_bounds == screen_bounds &&
	!base::ContainsKey(unsynced_extensions_, extension_id))
	return;

	base::Time now = base::Time::Now();

	extension_data[window_id].bounds = bounds;
	extension_data[window_id].screen_bounds = screen_bounds;
	extension_data[window_id].window_state = window_state;
	extension_data[window_id].last_change = now;

	if (extension_data.size() > kMaxCachedWindows) {
	auto oldest = extension_data.end();
	// Too many windows in the cache, find the oldest one to remove.
	for (auto 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, &AppWindowGeometryCache::SyncToStorage);
	}

	void AppWindowGeometryCache::SyncToStorage() {
	std::set<std::string> tosync;
	tosync.swap(unsynced_extensions_);
	for (auto it = tosync.cbegin(), eit = tosync.cend(); it != eit; ++it) {
	const std::string& extension_id = *it;
	const ExtensionData& extension_data = cache_[extension_id];

	std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
	for (auto it = extension_data.cbegin(), eit = extension_data.cend();
	it != eit; ++it) {
	std::unique_ptr<base::DictionaryValue> value =
	std::make_unique<base::DictionaryValue>();
	const gfx::Rect& bounds = it->second.bounds;
	const gfx::Rect& screen_bounds = it->second.screen_bounds;
	DCHECK(!bounds.IsEmpty());
	DCHECK(!screen_bounds.IsEmpty());
	DCHECK(it->second.window_state != ui::SHOW_STATE_DEFAULT);
	value->SetInteger("x", bounds.x());
	value->SetInteger("y", bounds.y());
	value->SetInteger("w", bounds.width());
	value->SetInteger("h", bounds.height());
	value->SetInteger("screen_bounds_x", screen_bounds.x());
	value->SetInteger("screen_bounds_y", screen_bounds.y());
	value->SetInteger("screen_bounds_w", screen_bounds.width());
	value->SetInteger("screen_bounds_h", screen_bounds.height());
	value->SetInteger("state", it->second.window_state);
	value->SetString(
	"ts", base::Int64ToString(it->second.last_change.ToInternalValue()));
	dict->SetWithoutPathExpansion(it->first, std::move(value));

	for (auto& observer : observers_)
	observer.OnGeometryCacheChanged(extension_id, it->first, bounds);
	}

	prefs_->SetGeometryCache(extension_id, std::move(dict));
	}
	}

	bool AppWindowGeometryCache::GetGeometry(const std::string& extension_id,
	const std::string& window_id,
	gfx::Rect* bounds,
	gfx::Rect* screen_bounds,
	ui::WindowShowState* window_state) {
	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 or
	// the cache was not constructed until after the extension was loaded.
	// Attempt to load from sync to address the latter case.
	if (extension_data_it == cache_.end()) {
	LoadGeometryFromStorage(extension_id);
	extension_data_it = cache_.find(extension_id);
	DCHECK(extension_data_it != cache_.end());
	}

	auto window_data_it = extension_data_it->second.find(window_id);

	if (window_data_it == extension_data_it->second.end())
	return false;

	const WindowData& window_data = window_data_it->second;

	// Check for and do not return corrupt data.
	if ((bounds && window_data.bounds.IsEmpty()) \|\|
	(screen_bounds && window_data.screen_bounds.IsEmpty()) \|\|
	(window_state && window_data.window_state == ui::SHOW_STATE_DEFAULT))
	return false;

	if (bounds)
	*bounds = window_data.bounds;
	if (screen_bounds)
	*screen_bounds = window_data.screen_bounds;
	if (window_state)
	*window_state = window_data.window_state;
	return true;
	}

	void AppWindowGeometryCache::Shutdown() { SyncToStorage(); }

	AppWindowGeometryCache::WindowData::WindowData()
	: window_state(ui::SHOW_STATE_DEFAULT) {}

	AppWindowGeometryCache::WindowData::~WindowData() {}

	void AppWindowGeometryCache::OnExtensionLoaded(
	content::BrowserContext* browser_context,
	const Extension* extension) {
	LoadGeometryFromStorage(extension->id());
	}

	void AppWindowGeometryCache::OnExtensionUnloaded(
	content::BrowserContext* browser_context,
	const Extension* extension,
	UnloadedExtensionReason reason) {
	SyncToStorage();
	cache_.erase(extension->id());
	}

	void AppWindowGeometryCache::SetSyncDelayForTests(int timeout_ms) {
	sync_delay_ = base::TimeDelta::FromMilliseconds(timeout_ms);
	}

	void AppWindowGeometryCache::LoadGeometryFromStorage(
	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();
	auto 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("screen_bounds_x", &i))
	window_data.screen_bounds.set_x(i);
	if (stored_window->GetInteger("screen_bounds_y", &i))
	window_data.screen_bounds.set_y(i);
	if (stored_window->GetInteger("screen_bounds_w", &i))
	window_data.screen_bounds.set_width(i);
	if (stored_window->GetInteger("screen_bounds_h", &i))
	window_data.screen_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_t ts;
	if (base::StringToInt64(ts_as_string, &ts)) {
	window_data.last_change = base::Time::FromInternalValue(ts);
	}
	}
	}
	}
	}
	}

	///////////////////////////////////////////////////////////////////////////////
	// Factory boilerplate

	// static
	AppWindowGeometryCache* AppWindowGeometryCache::Factory::GetForContext(
	content::BrowserContext* context,
	bool create) {
	return static_cast<AppWindowGeometryCache*>(
	GetInstance()->GetServiceForBrowserContext(context, create));
	}

	AppWindowGeometryCache::Factory*
	AppWindowGeometryCache::Factory::GetInstance() {
	return base::Singleton<AppWindowGeometryCache::Factory>::get();
	}

	AppWindowGeometryCache::Factory::Factory()
	: BrowserContextKeyedServiceFactory(
	"AppWindowGeometryCache",
	BrowserContextDependencyManager::GetInstance()) {
	DependsOn(ExtensionPrefsFactory::GetInstance());
	}

	AppWindowGeometryCache::Factory::~Factory() {}

	KeyedService* AppWindowGeometryCache::Factory::BuildServiceInstanceFor(
	content::BrowserContext* context) const {
	return new AppWindowGeometryCache(context, ExtensionPrefs::Get(context));
	}

	bool AppWindowGeometryCache::Factory::ServiceIsNULLWhileTesting() const {
	return false;
	}

	content::BrowserContext*
	AppWindowGeometryCache::Factory::GetBrowserContextToUse(
	content::BrowserContext* context) const {
	return ExtensionsBrowserClient::Get()->GetOriginalContext(context);
	}

	void AppWindowGeometryCache::AddObserver(Observer* observer) {
	observers_.AddObserver(observer);
	}

	void AppWindowGeometryCache::RemoveObserver(Observer* observer) {
	observers_.RemoveObserver(observer);
	}

	} // namespace extensions