[ jEdit-commits ] SF.net SVN: jedit:[24502] jEdit/trunk/org/gjt/sp/jedit/print/Margins.java

[<dal...@us...>]

Revision: 24502
          http://sourceforge.net/p/jedit/svn/24502
Author:   daleanson
Date:     2016-08-16 17:05:13 +0000 (Tue, 16 Aug 2016)
Log Message:
-----------
Class to represent margins for printing.

Added Paths:
-----------
    jEdit/trunk/org/gjt/sp/jedit/print/Margins.java

Added: jEdit/trunk/org/gjt/sp/jedit/print/Margins.java
===================================================================
--- jEdit/trunk/org/gjt/sp/jedit/print/Margins.java	                        (rev 0)
+++ jEdit/trunk/org/gjt/sp/jedit/print/Margins.java	2016-08-16 17:05:13 UTC (rev 24502)
@@ -0,0 +1,175 @@
+
+package org.gjt.sp.jedit.print;
+
+import java.util.Locale;
+import javax.print.attribute.Attribute;
+import javax.print.attribute.DocAttribute;
+import javax.print.attribute.PrintJobAttribute;
+import javax.print.attribute.PrintRequestAttribute;
+import static javax.print.attribute.Size2DSyntax.*;
+
+
+/**
+ * Custom printing attribute to represent page margins.
+ */
+public class Margins implements DocAttribute, PrintRequestAttribute, PrintJobAttribute
+{
+
+    // margins are stored in micromillimeters
+    private float top;
+    private float left;
+    private float right;
+    private float bottom;
+
+
+    /**
+     * @param units One of INCH or MM.
+     */
+    public Margins( float top, float left, float right, float bottom )
+    {
+        if ( top < 0.0 || left < 0.0 || right < 0.0 || bottom < 0.0 )
+        {
+
+            // this shouldn't happen since the printer dialog margin text fields
+            // only accept positive numbers
+            throw new IllegalArgumentException( "Invalid margin." );
+        }
+
+        float u = new Integer( getUnits() ).floatValue();
+        this.top = top * u;
+        this.left = left * u;
+        this.right = right * u;
+        this.bottom = bottom * u;
+    }
+
+
+    // returns INCH or MM depending on Locale
+    // note that while Canada is mostly metric, Canadian paper sizes
+    // are essentially US ANSI sizes rounded to the nearest 5 mm
+    private int getUnits()
+    {
+        String country = Locale.getDefault().getCountry();
+        if ( "".equals( country ) || Locale.US.getCountry().equals( country ) || Locale.CANADA.getCountry().equals( country ) )
+        {
+            return INCH;
+        }
+
+
+        return MM;
+    }
+
+
+    /**
+     * Get the margins as an array of 4 values in the order
+     * top, left, right, bottom. The values returned are in the given units.
+     * @param  units Unit conversion factor, either INCH or MM.
+     *
+     * @return margins as array of top, left, right, bottom in the specified units.
+     *
+     * @exception  IllegalArgumentException on invalid units.
+     */
+    public float[] getMargins( int units )
+    {
+        switch ( units )
+
+        {
+            case INCH:
+            case MM:
+                break;
+            default:
+                throw new IllegalArgumentException( "Invalid units." );
+        }
+
+        return new float[] {getTop( units ), getLeft( units ), getRight( units ), getBottom( units )};
+    }
+
+
+    public float getTop( int units )
+    {
+        return convertFromMicrometers( top, units );
+    }
+
+
+    public float getLeft( int units )
+    {
+        return convertFromMicrometers( left, units );
+    }
+
+
+    public float getRight( int units )
+    {
+        return convertFromMicrometers( right, units );
+    }
+
+
+    public float getBottom( int units )
+    {
+        return convertFromMicrometers( bottom, units );
+    }
+
+
+    public final Class<? extends Attribute> getCategory()
+    {
+        return Margins.class;
+    }
+
+
+    public final String getName()
+    {
+        return "margins";
+    }
+
+
+    private float convertFromMicrometers( float margin, int units )
+    {
+        return margin / new Integer( units ).floatValue();
+    }
+
+
+    public String toString( int units )
+    {
+        String uom = "";
+        switch ( units )
+
+        {
+            case INCH:
+                uom = "in";
+                break;
+            case MM:
+                uom = "mm";
+                break;
+            default:
+                throw new IllegalArgumentException( "Invalid units." );
+        }
+
+
+        float[] margins = getMargins( units );
+        StringBuilder sb = new StringBuilder(128);
+        sb.append( "Margins(" ).append( uom ).append( ")[top:" ).append( margins[0] ).append( ", left:" );
+        sb.append( margins[1] ).append( ", right:" ).append( margins[2] ).append( ", bottom:" ).append( margins[3] ).append( ']' );
+        return sb.toString();
+    }
+
+
+    public boolean equals( Object object )
+    {
+        boolean toReturn = false;
+        if ( object instanceof Margins )
+        {
+            Margins margins = ( Margins )object;
+            if ( top == margins.top && left == margins.left && bottom == margins.bottom && right == margins.right )
+            {
+                toReturn = true;
+            }
+        }
+
+
+        return toReturn;
+    }
+
+
+    public int hashCode()
+    {
+        return new Float(top).intValue() + 37 * new Float(left).intValue() + 43 * new Float(right).intValue() + 47 * new Float(bottom).intValue();
+    }
+}

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