Only generate suggested filenames when actually dragging an image.

third_party/WebKit/Source/platform/clipboard/ClipboardUtilitiesPosix.cpp

-/*
- * Copyright (C) 2009 Apple Inc.  All rights reserved.
- * Copyright (C) 2009 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "platform/clipboard/ClipboardUtilities.h"
-
-#include "wtf/text/WTFString.h"
-
-namespace blink {
-
-// On POSIX systems, the typical filename length limit is 255 character units.
-// HFS+'s limit is actually 255 Unicode characters using Apple's modification of
-// Normzliation Form D, but the differences aren't really worth dealing with
-// here.
-static const unsigned maxFilenameLength = 255;
-
-static bool isInvalidFileCharacter(UChar c) {
-  // HFS+ disallows '/' and Linux systems also disallow null. For sanity's sake
-  // we'll also disallow control characters.
-  return c < ' ' || c == 0x7F || c == '/';
-}
-
-void validateFilename(String& name, String& extension) {
-  // Remove any invalid file system characters, especially "/".
-  name = name.removeCharacters(&isInvalidFileCharacter);
-  extension = extension.removeCharacters(&isInvalidFileCharacter);
-
-  // Remove a ridiculously-long extension.
-  if (extension.length() >= maxFilenameLength)
-    extension = String();
-
-  // Truncate an overly-long filename, reserving one character for a dot.
-  name.truncate(maxFilenameLength - extension.length() - 1);
-}
-
-}  // namespace blink