Implementing directional selection strategy in Blink.

Source/core/editing/SelectionStrategy.h

 /*

[yosin_UTC9, 2015/04/21 01:59:52]

nit: Let's use the short version of licence comment.
http://dev.chromium.org/blink/coding-style#TOC-License

[mfomitchev, 2015/04/21 18:44:25]

Done.

- * Copyright (C) 2013 Google Inc. All rights reserved.
+ * Copyright 2015, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * 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.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "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 THE COPYRIGHT
  * OWNER 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.
  */
 
-#ifndef AnimatedStyleBuilder_h
-#define AnimatedStyleBuilder_h
-
-#include "core/CSSPropertyNames.h"
+#ifndef SelectionStrategy_h
+#define SelectionStrategy_h
 
 namespace blink {
 
-class AnimatableValue;
-class StyleResolverState;
-
-class AnimatedStyleBuilder {
-public:
-    static void applyProperty(CSSPropertyID, StyleResolverState&, const AnimatableValue*);
+enum SelectionStrategy {

[yosin_UTC9, 2015/04/21 01:59:52]

nit: Let's use |enum class| for better type checking.

[mfomitchev, 2015/04/21 18:44:25]

Done.

+    // Always using CharacterGranularity
+    StrategyCharacter,
+    // Switches between WordGranularity and CharacterGranularity
+    // Depending on whether the selection or growing or shrinking
+    StrategyDirection,
 };
 
 } // namespace blink
 
-#endif // AnimatedStyleBuilder_h
+#endif // SelectionStrategy_h