Upstream //ios/chrome/browser/snapshots

ios/chrome/browser/ui/snapshots_util.mm

-// Copyright 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 "ios/chrome/browser/ui/snapshots_util.h"
-
-#import <UIKit/UIKit.h>
-
-#include "base/files/file_util.h"
-#include "base/ios/ios_util.h"
-#include "base/location.h"
-#include "base/mac/foundation_util.h"
-#include "base/path_service.h"
-#include "base/strings/stringprintf.h"
-#include "ios/web/public/web_thread.h"
-
-namespace {
-const char* kOrientationDescriptions[] = {
-    "LandscapeLeft",
-    "LandscapeRight",
-    "Portrait",
-    "PortraitUpsideDown",
-};
-}  // namespace
-
-void ClearIOSSnapshots() {
-  // Generates a list containing all the possible snapshot paths because the
-  // list of snapshots stored on the device can't be obtained programmatically.
-  std::vector<base::FilePath> snapshotsPaths;
-  GetSnapshotsPaths(&snapshotsPaths);
-  for (base::FilePath snapshotPath : snapshotsPaths) {
-    web::WebThread::PostBlockingPoolTask(
-        FROM_HERE,
-        base::Bind(base::IgnoreResult(&base::DeleteFile), snapshotPath, false));
-  }
-}
-
-void GetSnapshotsPaths(std::vector<base::FilePath>* snapshotsPaths) {
-  DCHECK(snapshotsPaths);
-  base::FilePath snapshotsDir;
-  PathService::Get(base::DIR_CACHE, &snapshotsDir);
-  snapshotsDir =
-      snapshotsDir.Append("Snapshots").Append(base::mac::BaseBundleID());
-  if (base::ios::IsRunningOnIOS8OrLater()) {
-    // On iOS8, the snapshots are located in a path with the bundle ID used
-    // twice.
-    snapshotsDir = snapshotsDir.Append(base::mac::BaseBundleID());
-  } else {
-    // On iOS7, the snapshots are located in the subfolder "Main".
-    snapshotsDir = snapshotsDir.Append("Main");
-  }
-  const char* retinaSuffix = "";
-  CGFloat scale = [UIScreen mainScreen].scale;
-  if (scale == 2) {
-    retinaSuffix = "@2x";
-  } else if (scale == 3) {
-    retinaSuffix = "@3x";
-  }
-  for (unsigned int i = 0; i < arraysize(kOrientationDescriptions); i++) {
-    std::string snapshotFilename =
-        base::StringPrintf("UIApplicationAutomaticSnapshotDefault-%s%s.png",
-                           kOrientationDescriptions[i], retinaSuffix);
-    base::FilePath snapshotPath = snapshotsDir.Append(snapshotFilename);
-    snapshotsPaths->push_back(snapshotPath);
-  }
-}