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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef GridCoordinate_h
     32 #define GridCoordinate_h
     33 
     34 #include "wtf/HashMap.h"
     35 #include "wtf/PassOwnPtr.h"
     36 #include "wtf/text/WTFString.h"
     37 
     38 namespace WebCore {
     39 
     40 // A span in a single direction (either rows or columns). Note that |initialPositionIndex|
     41 // and |finalPositionIndex| are grid areas' indexes, NOT grid lines'. Iterating over the
     42 // span should include both |initialPositionIndex| and |finalPositionIndex| to be correct.
     43 struct GridSpan {
     44     static PassOwnPtr<GridSpan> create(size_t initialPosition, size_t finalPosition)
     45     {
     46         return adoptPtr(new GridSpan(initialPosition, finalPosition));
     47     }
     48 
     49     GridSpan(size_t initialPosition, size_t finalPosition)
     50         : initialPositionIndex(initialPosition)
     51         , finalPositionIndex(finalPosition)
     52     {
     53         ASSERT(initialPositionIndex <= finalPositionIndex);
     54     }
     55 
     56     bool operator==(const GridSpan& o) const
     57     {
     58         return initialPositionIndex == o.initialPositionIndex && finalPositionIndex == o.finalPositionIndex;
     59     }
     60 
     61     size_t initialPositionIndex;
     62     size_t finalPositionIndex;
     63 };
     64 
     65 // This represents a grid area that spans in both rows' and columns' direction.
     66 struct GridCoordinate {
     67     // HashMap requires a default constuctor.
     68     GridCoordinate()
     69         : columns(0, 0)
     70         , rows(0, 0)
     71     {
     72     }
     73 
     74     GridCoordinate(const GridSpan& r, const GridSpan& c)
     75         : columns(c)
     76         , rows(r)
     77     {
     78     }
     79 
     80     bool operator==(const GridCoordinate& o) const
     81     {
     82         return columns == o.columns && rows == o.rows;
     83     }
     84 
     85     bool operator!=(const GridCoordinate& o) const
     86     {
     87         return !(*this == o);
     88     }
     89 
     90     GridSpan columns;
     91     GridSpan rows;
     92 };
     93 
     94 typedef HashMap<String, GridCoordinate> NamedGridAreaMap;
     95 
     96 } // namespace WebCore
     97 
     98 #endif // GridCoordinate_h
     99