Change directory structure.

[dvibrowser/dvi2epub.git] / src / main / java / jp / sourceforge / dvibrowser / dvicore / DviRectSplitter.java

diff --git a/src/main/java/jp/sourceforge/dvibrowser/dvicore/DviRectSplitter.java b/src/main/java/jp/sourceforge/dvibrowser/dvicore/DviRectSplitter.java
new file mode 100644 (file)
index 0000000..307ec62
--- /dev/null
+++ b/src/main/java/jp/sourceforge/dvibrowser/dvicore/DviRectSplitter.java
@@ -0,0 +1,88 @@
+package jp.sourceforge.dvibrowser.dvicore;
+
+/*
+ * Copyright (c) 2009, Takeyuki Nagao
+ * 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.
+ *    
+ * 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 HOLDER 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.
+ */
+
+public class DviRectSplitter {
+  private final DviRect rect;
+  private final DviSize unit;
+  private final int cols;
+  private final int rows;
+
+  public DviRectSplitter(DviRect rect, DviSize unit)
+  {
+    this.rect = rect;
+    this.unit = unit;
+    
+    if (unit.width == 0) throw new IllegalArgumentException("width must be > 0: " + unit.width);
+    if (unit.height == 0) throw new IllegalArgumentException("height must be > 0: " + unit.height);
+    this.cols = (rect.width() + unit.width - 1) / unit.width;
+    this.rows = (rect.height() + unit.height - 1) / unit.height;
+  }
+  
+  public int getNumColumns()
+  {
+    return cols;
+  }
+  
+  public int getNumRows()
+  {
+    return rows;
+  }
+  
+  public DviRect getRect() { return rect; }
+  public DviSize getUnitSize() { return unit; }
+  
+  public DviRect getRectAt(int row, int col)
+  {
+    if (row < 0 || rows <= row)
+      throw new IllegalArgumentException("Row index out of range: " + row);
+    if (col < 0 || cols <= col)
+      throw new IllegalArgumentException("Column index out of range: " + col);
+    int x = rect.x() + col * unit.width();
+    int y = rect.y() + row * unit.height();
+    DviRect r = new DviRect(x, y, unit);
+    
+    return r.intersect(rect);
+  }
+  
+  public DviRect [][] getRects()
+  {
+    DviRect [] [] rects = new DviRect[rows][cols];
+    for (int i=0; i<rows; i++) {
+      for (int j=0; j<cols; j++) {
+        rects[i][j] = getRectAt(i, j);
+      }
+    }
+    return rects;
+  }
+}