mpo 2003/08/29 15:31:33
Added: src/blocks/apples/samples/hanoi hanoi.jx intro.jx hanoi.xsl
src/blocks/apples/java/org/apache/cocoon/components/flow/apples/samples
HanoiApple.java
Log:
Adding Towers of Hanoi sample in the Apples block.
Revision Changes Path
1.1 cocoon-2.1/src/blocks/apples/samples/hanoi/hanoi.jx
Index: hanoi.jx
===================================================================
<?xml version="1.0"?>
<page xmlns:jx="http://apache.org/cocoon/templates/jx/1.0";>
<title>Tower of Hanoi Puzzle</title>
<content>
<para>For some background on the puzzle, see:
<a
href="http://www.cut-the-knot.org/recurrence/hanoi.shtml";>http://www.cut-the-knot.org/recurrence/hanoi.shtml</a>
</para>
<para>You've currently used ${moves} moves.</para>
<para>The current state of the stacks is:</para>
<hn:hanoi height="${puzzleSize}"
xmlns:hn="http://apache.org/cocoon/apples/samples/hanoi";>
<hn:float size="${floatingDisk}"/>
<hn:stacks>
<jx:forEach var="stack" items="${stacks}">
<hn:stack>
<jx:forEach var="disc" items="${stack}">
<hn:disc size="${disc}" />
</jx:forEach>
</hn:stack>
</jx:forEach>
</hn:stacks>
</hn:hanoi>
</content>
</page>
1.1 cocoon-2.1/src/blocks/apples/samples/hanoi/intro.jx
Index: intro.jx
===================================================================
<?xml version="1.0"?>
<page xmlns:jx="http://apache.org/cocoon/templates/jx/1.0";>
<title>Tower of Hanoi Puzzle</title>
<content>
<para>For some background on the puzzle, see:
<a
href="http://www.cut-the-knot.org/recurrence/hanoi.shtml";>http://www.cut-the-knot.org/recurrence/hanoi.shtml</a>
</para>
<para>To start the puzzle interaction you need to initilaize the number
of discs: </para>
<form method="post" action="${continuation.id}.continue">
<select name="size">
<option>3</option>
<option selected="selected">4</option>
<option>5</option>
<option>6</option>
<option>7</option>
<option>8</option>
</select>
<input type="submit" value="Start!"/>
</form>
</content>
</page>
1.1 cocoon-2.1/src/blocks/apples/samples/hanoi/hanoi.xsl
Index: hanoi.xsl
===================================================================
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:hn="http://apache.org/cocoon/apples/samples/hanoi";>
<xsl:template match="hn:hanoi">
<xsl:variable name="stacks" select="hn:stacks"/>
<xsl:variable name="height" select="@height"/>
<xsl:variable name="cols-per-stack" select="($height)*2 + 1"/>
<xsl:variable name="cols-total" select="($cols-per-stack)*3"/>
<xsl:variable name="on-the-move" select="boolean(hn:float/@size != '')"/>
<center>
<table border="0">
<!-- fixing col-widths row -->
<tr>
<xsl:call-template name="fix-cells" >
<xsl:with-param name="remaining" select="$cols-total" />
</xsl:call-template>
</tr>
<!-- /fixing col-widths row -->
<!-- title-row -->
<tr>
<td colspan="{$cols-total}">
<center>-- Towers of Hanoi Puzzle --</center>
<hr width="70%" />
</td>
</tr>
<!-- /title-row -->
<!-- moving-disc-row -->
<tr>
<td colspan="{$cols-total}"><center>Disc on the move:</center></td>
</tr>
<tr bgcolor="#ffffff" height="5px">
<td colspan="{$cols-per-stack}"/>
<xsl:call-template name="disc">
<xsl:with-param name="disc" select="hn:float" />
<xsl:with-param name="max_size" select="$height"/>
<xsl:with-param name="disc_color">#996633</xsl:with-param>
</xsl:call-template>
<td colspan="{$cols-per-stack}"/>
</tr>
<tr>
<td colspan="{$cols-total}"><hr width="70%"/></td>
</tr>
<!-- /moving-disc-row -->
<!-- stack-header-row -->
<tr>
<xsl:choose>
<xsl:when test="$on-the-move" >
<td colspan="{$cols-per-stack}"><center><a
href="?stack=0">Drop It!</a></center></td>
<td colspan="{$cols-per-stack}"><center><a
href="?stack=1">Drop It!</a></center></td>
<td colspan="{$cols-per-stack}"><center><a
href="?stack=2">Drop It!</a></center></td>
</xsl:when>
<xsl:otherwise>
<td colspan="{$cols-per-stack}"><center><a
href="?stack=0">Lift It!</a></center></td>
<td colspan="{$cols-per-stack}"><center><a
href="?stack=1">Lift It!</a></center></td>
<td colspan="{$cols-per-stack}"><center><a
href="?stack=2">Lift It!</a></center></td>
</xsl:otherwise>
</xsl:choose>
</tr>
<!-- /stack-header-row -->
<!-- stack-rows -->
<xsl:call-template name="remaining-stack-rows">
<xsl:with-param name="remaining" select="$height"/>
<xsl:with-param name="max_size" select="$height"/>
<xsl:with-param name="cols-per-stack" select="$cols-per-stack"/>
<xsl:with-param name="stacks" select="$stacks"/>
</xsl:call-template>
<!-- /stack-rows -->
</table>
</center>
</xsl:template>
<xsl:template name="remaining-stack-rows">
<xsl:param name="remaining"/>
<xsl:param name="max_size"/>
<xsl:param name="cols-per-stack"/>
<xsl:param name="stacks"/>
<xsl:call-template name="stack-row">
<xsl:with-param name="row-number" select="$remaining"/>
<xsl:with-param name="max_size" select="$max_size"/>
<xsl:with-param name="cols-per-stack" select="$cols-per-stack"/>
<xsl:with-param name="stacks" select="$stacks"/>
</xsl:call-template>
<xsl:if test="$remaining > 1">
<xsl:call-template name="remaining-stack-rows">
<xsl:with-param name="remaining" select="$remaining - 1"/>
<xsl:with-param name="max_size" select="$max_size"/>
<xsl:with-param name="cols-per-stack" select="$cols-per-stack"/>
<xsl:with-param name="stacks" select="$stacks"/>
</xsl:call-template>
</xsl:if>
</xsl:template>
<xsl:template name="stack-row">
<xsl:param name="row-number"/>
<xsl:param name="max_size"/>
<xsl:param name="cols-per-stack"/>
<xsl:param name="stacks"/>
<tr height="5px" bgcolor="#ffffff">
<xsl:for-each select="$stacks/hn:stack">
<xsl:variable name="stack-ndx" select="position()"/>
<xsl:call-template name="disc">
<xsl:with-param name="disc" select="hn:disc[number($row-number)]" />
<xsl:with-param name="max_size" select="$max_size"/>
<xsl:with-param name="disc_color">#2C6D91</xsl:with-param>
</xsl:call-template>
</xsl:for-each>
</tr>
</xsl:template>
<xsl:template name="disc">
<xsl:param name="disc" />
<xsl:param name="max_size" />
<xsl:param name="disc_color" />
<xsl:variable name="size" select="$disc/@size" />
<xsl:choose>
<xsl:when test="$size > 0" >
<xsl:choose>
<xsl:when test="($max_size - $size) > 0" >
<td colspan="{$max_size - $size}" bgcolor="#ffffff"/>
<td colspan="{$size}" bgcolor="{$disc_color}"/>
<td bgcolor="#000000"/>
<td colspan="{$size}" bgcolor="{$disc_color}"/>
<td colspan="{$max_size - $size}" bgcolor="#ffffff"/>
</xsl:when>
<xsl:otherwise>
<td colspan="{$size}" bgcolor="{$disc_color}"/>
<td bgcolor="#000000"/>
<td colspan="{$size}" bgcolor="{$disc_color}"/>
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:otherwise>
<td colspan="{$max_size}" bgcolor="#ffffff"/>
<td bgcolor="#000000"/>
<td colspan="{$max_size}" bgcolor="#ffffff"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template name="fix-cells">
<xsl:param name="remaining"/>
<td width="5px" />
<xsl:if test="$remaining > 1">
<xsl:call-template name="fix-cells">
<xsl:with-param name="remaining" select="$remaining - 1"/>
</xsl:call-template>
</xsl:if>
</xsl:template>
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
1.1
cocoon-2.1/src/blocks/apples/java/org/apache/cocoon/components/flow/apples/samples/HanoiApple.java
Index: HanoiApple.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, 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.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
[EMAIL PROTECTED]
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, 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.
*/
package org.apache.cocoon.components.flow.apples.samples;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.components.flow.apples.AppleController;
import org.apache.cocoon.components.flow.apples.AppleRequest;
import org.apache.cocoon.components.flow.apples.AppleResponse;
/**
* HanoiApple shows an apple maintaining the state of the fanous puzzle.
*/
public class HanoiApple extends AbstractLogEnabled implements AppleController
{
public static final int NONE = -1;
public static final int SRC = 0;
public static final int AUX = 1;
public static final int DST = 2;
// full state of the puzzle is in the following variables
public Stack[] stacks;
public Object floatingDisk = null;
public int moves = 0;
public int puzzleSize = 0;
public String toString() {
return "HanoiApple[ stacks=" + this.stacks + " | floatingDisk=" +
this.floatingDisk
+ " | moves = " + this.moves + "]";
}
public void process(AppleRequest req, AppleResponse res) throws
ProcessingException {
// processing
if (stacks == null) {
String requestSize = req.getCocoonRequest().getParameter("size");
if (requestSize != null) {
try {
int size = Integer.parseInt(requestSize);
intializeStacks(size);
} catch (NumberFormatException ignore) {
}
}
} else {
// decide selected column
String requestStack =
req.getCocoonRequest().getParameter("stack");
if (requestStack != null) {
try {
int stackNdx = Integer.parseInt(requestStack);
if (this.floatingDisk != null) {
// we are in the middle of a move --> complete move
if it is allowed
if ( this.stacks[stackNdx].size() == 0
|| ((Integer)this.floatingDisk).intValue() <
((Integer)this.stacks[stackNdx].peek()).intValue()) {
this.stacks[stackNdx].push(this.floatingDisk);
this.floatingDisk = null;
this.moves++;
}
} else {
if (this.stacks[stackNdx].size() != 0) {
this.floatingDisk = this.stacks[stackNdx].pop();
}
}
} catch (RuntimeException ignore) {
//NUMBERFORMAT
//ARRAYINDEXOUTOFBOUNDS
}
}
}
getLogger().debug(toString());
//view generation
if (stacks == null) {
res.sendPage("hanoi/intro.jx", null);
} else {
Map bizdata = new HashMap();
bizdata.put("stacks" , this.stacks);
bizdata.put("moves" , "" + this.moves);
bizdata.put("floatingDisk", this.floatingDisk);
bizdata.put("nextMove" , this.floatingDisk==null ? "Lift it!"
: "Drop it!");
bizdata.put("puzzleSize" , "" + this.puzzleSize);
res.sendPage("hanoi/hanoi.jx", bizdata);
}
}
private void intializeStacks(int size) {
if (size > 2) {
this.stacks = new Stack[3];
for (int i = 0; i < 3; i++) {
this.stacks[i] = new Stack();
}
for (int i = size; i > 0; i--) {
this.stacks[0].push(new Integer(i));
}
this.puzzleSize = size;
}
}
}
