Refactor screenshot directory source

chrome/browser/ui/ash/screenshot_taker.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/ash/screenshot_taker.h"
 
 #include <climits>
 #include <string>
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
-#include "base/i18n/time_formatting.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/stringprintf.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/time.h"
-#include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_prefs.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/ui/webui/screenshot_source.h"
 #include "chrome/browser/ui/window_snapshot/window_snapshot.h"
-#include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_thread.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/gdata/drive_file_system_util.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #endif
 
 namespace {
 // How opaque should the layer that we flash onscreen to provide visual
 // feedback after the screenshot is taken be?
 const float kVisualFeedbackLayerOpacity = 0.25f;
 
 // How long should the visual feedback layer be displayed?
 const int64 kVisualFeedbackLayerDisplayTimeMs = 100;
 
 // The minimum interval between two screenshot commands.  It has to be
 // more than 1000 to prevent the conflict of filenames.
 const int kScreenshotMinimumIntervalInMS = 1000;
 
-bool ShouldUse24HourClock() {
-#if defined(OS_CHROMEOS)
-  Profile* profile = ProfileManager::GetDefaultProfileOrOffTheRecord();
-  if (profile) {
-    PrefService* pref_service = profile->GetPrefs();
-    if (pref_service) {
-      return pref_service->GetBoolean(prefs::kUse24HourClock);
-    }
-  }
-#endif
-  return base::GetHourClockType() == base::k24HourClock;
-}
-
-bool AreScreenshotsDisabled() {
-  return g_browser_process->local_state()->GetBoolean(
-      prefs::kDisableScreenshots);
-}
-
-std::string GetScreenshotBaseFilename() {
-  base::Time::Exploded now;
-  base::Time::Now().LocalExplode(&now);
-
-  // We don't use base/i18n/time_formatting.h here because it doesn't
-  // support our format.  Don't use ICU either to avoid i18n file names
-  // for non-English locales.
-  // TODO(mukai): integrate this logic somewhere time_formatting.h
-  std::string file_name = base::StringPrintf(
-      "Screenshot %d-%02d-%02d at ", now.year, now.month, now.day_of_month);
-
-  if (ShouldUse24HourClock()) {
-    file_name.append(base::StringPrintf(
-        "%02d.%02d.%02d", now.hour, now.minute, now.second));
-  } else {
-    int hour = now.hour;
-    if (hour > 12) {
-      hour -= 12;
-    } else if (hour == 0) {
-      hour = 12;
-    }
-    file_name.append(base::StringPrintf(
-        "%d.%02d.%02d ", hour, now.minute, now.second));
-    file_name.append((now.hour >= 12) ? "PM" : "AM");
-  }
-
-  return file_name;
-}
-
-bool GetScreenshotDirectory(FilePath* directory) {
-  if (AreScreenshotsDisabled())
-    return false;
-
-  bool is_logged_in = true;
-#if defined(OS_CHROMEOS)
-  is_logged_in = chromeos::UserManager::Get()->IsUserLoggedIn();
-#endif
-
-  if (is_logged_in) {
-    DownloadPrefs* download_prefs = DownloadPrefs::FromBrowserContext(
-        ash::Shell::GetInstance()->delegate()->GetCurrentBrowserContext());
-    *directory = download_prefs->DownloadPath();
-  } else {
-    if (!file_util::GetTempDir(directory)) {
-      LOG(ERROR) << "Failed to find temporary directory.";
-      return false;
-    }
-  }
-  return true;
-}
 
 void SaveScreenshotInternal(const FilePath& screenshot_path,
                             scoped_refptr<base::RefCountedBytes> png_data) {
   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
   DCHECK(!screenshot_path.empty());
   if (static_cast<size_t>(file_util::WriteFile(
           screenshot_path,
           reinterpret_cast<char*>(&(png_data->data()[0])),
           png_data->size())) != png_data->size()) {
     LOG(ERROR) << "Failed to save to " << screenshot_path.value();
@@ skipping 50 matching lines @@
       FROM_HERE, base::Bind(&SaveScreenshot, screenshot_path, png_data));
 }
 #endif
 
 bool GrabWindowSnapshot(aura::Window* window,
                         const gfx::Rect& snapshot_bounds,
                         std::vector<unsigned char>* png_data) {
 #if defined(OS_LINUX)
   // chrome::GrabWindowSnapshotForUser checks this too, but
   // RootWindow::GrabSnapshot does not.
-  if (AreScreenshotsDisabled())
+  if (ScreenshotSource::AreScreenshotsDisabled())
     return false;
 
   // We use XGetImage() for Linux/ChromeOS for performance reasons.
   // See crbug.com/119492
   // TODO(mukai): remove this when the performance issue has been fixed.
   if (window->GetRootWindow()->GrabSnapshot(snapshot_bounds, png_data))
     return true;
 #endif  // OS_LINUX
 
   return chrome::GrabWindowSnapshotForUser(window, png_data, snapshot_bounds);
 }
 
 }  // namespace
 
 ScreenshotTaker::ScreenshotTaker() {
 }
 
 ScreenshotTaker::~ScreenshotTaker() {
 }
 
 void ScreenshotTaker::HandleTakeScreenshotForAllRootWindows() {
   FilePath screenshot_directory;
-  if (!GetScreenshotDirectory(&screenshot_directory))
+  if (!ScreenshotSource::GetScreenshotDirectory(&screenshot_directory))
     return;
 
-  std::string screenshot_basename = GetScreenshotBaseFilename();
+  std::string screenshot_basename =
+      ScreenshotSource::GetScreenshotBaseFilename();
   ash::Shell::RootWindowList root_windows = ash::Shell::GetAllRootWindows();
   for (size_t i = 0; i < root_windows.size(); ++i) {
     aura::RootWindow* root_window = root_windows[i];
     scoped_refptr<base::RefCountedBytes> png_data(new base::RefCountedBytes);
     std::string basename = screenshot_basename;
     gfx::Rect rect = root_window->bounds();
     if (root_windows.size() > 1)
       basename += base::StringPrintf(" - Display %d", static_cast<int>(i + 1));
     if (GrabWindowSnapshot(root_window, rect, &png_data->data())) {
       DisplayVisualFeedback(rect);
       PostSaveScreenshotTask(
           screenshot_directory.AppendASCII(basename + ".png"), png_data);
     } else {
       LOG(ERROR) << "Failed to grab the window screenshot for " << i;
     }
   }
   last_screenshot_timestamp_ = base::Time::Now();
 }
 
 void ScreenshotTaker::HandleTakePartialScreenshot(
     aura::Window* window, const gfx::Rect& rect) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 
   FilePath screenshot_directory;
-  if (!GetScreenshotDirectory(&screenshot_directory))
+  if (!ScreenshotSource::GetScreenshotDirectory(&screenshot_directory))
     return;
 
   scoped_refptr<base::RefCountedBytes> png_data(new base::RefCountedBytes);
 
   if (GrabWindowSnapshot(window, rect, &png_data->data())) {
     last_screenshot_timestamp_ = base::Time::Now();
     DisplayVisualFeedback(rect);
     PostSaveScreenshotTask(
-        screenshot_directory.AppendASCII(GetScreenshotBaseFilename() + ".png"),
-        png_data);
+        screenshot_directory.AppendASCII(
+                   ScreenshotSource::GetScreenshotBaseFilename() + ".png"),
+                   png_data);
   } else {
     LOG(ERROR) << "Failed to grab the window screenshot";
   }
 }
 
 bool ScreenshotTaker::CanTakeScreenshot() {
   return last_screenshot_timestamp_.is_null() ||
       base::Time::Now() - last_screenshot_timestamp_ >
       base::TimeDelta::FromMilliseconds(
           kScreenshotMinimumIntervalInMS);
@@ skipping 14 matching lines @@
       ash::internal::kShellWindowId_OverlayContainer)->layer();
   parent->Add(visual_feedback_layer_.get());
   visual_feedback_layer_->SetVisible(true);
 
   MessageLoopForUI::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&ScreenshotTaker::CloseVisualFeedbackLayer,
                  base::Unretained(this)),
       base::TimeDelta::FromMilliseconds(kVisualFeedbackLayerDisplayTimeMs));
 }