Dépôt officiel du code source de l'ERP OpenConcerto

/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.

 *

 * The contents of this file are subject to the terms of the GNU General Public License Version 3

 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a

 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific

 * language governing permissions and limitations under the License.

 *

 * When distributing the software, include this License Header Notice in each file.

 */

 /*

 * Créé le 28 oct. 2004

 */

package org.openconcerto.openoffice;

import org.openconcerto.utils.CollectionUtils;

import org.openconcerto.xml.JDOMUtils;

import org.openconcerto.xml.Validator;

import java.math.BigDecimal;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Map.Entry;

import java.util.SortedMap;

import java.util.TreeMap;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import javax.xml.XMLConstants;

import javax.xml.validation.Schema;

import javax.xml.validation.SchemaFactory;

import org.jdom.Content;

import org.jdom.Document;

import org.jdom.Element;

import org.jdom.JDOMException;

import org.jdom.Namespace;

import org.jdom.Parent;

import org.jdom.Text;

import org.jdom.xpath.XPath;

import org.xml.sax.SAXException;

/**

 * Various bits of OpenDocument XML.

 *

 * @author Sylvain CUAZ

 * @see #get(XMLFormatVersion)

 */

public abstract class OOXML implements Comparable<OOXML> {

    /**

     * If this system property is set to <code>true</code> then {@link #get(XMLFormatVersion)} will

     * never return <code>null</code>, allowing to support unknown versions.

     */

    public static final String LAST_FOR_UNKNOWN_PROP = OOXML.class.getPackage().getName() + ".lastOOXMLForUnknownVersion";

    private static final XML_OO instanceOO = new XML_OO();

    private static final SortedMap<String, XML_OD> instancesODByDate = new TreeMap<String, XML_OD>();

    private static final Map<String, XML_OD> instancesODByVersion = new HashMap<String, XML_OD>();

    private static final List<OOXML> values;

    private static OOXML defaultInstance;

    static {

        register(new XML_OD_1_0());

        register(new XML_OD_1_1());

        register(new XML_OD_1_2());

        values = new ArrayList<OOXML>(instancesODByDate.size() + 1);

        values.add(instanceOO);

        values.addAll(instancesODByDate.values());

        setDefault(getLast());

    }

    private static void register(XML_OD xml) {

        assert xml.getVersion() == XMLVersion.OD;

        instancesODByDate.put(xml.getDateString(), xml);

        instancesODByVersion.put(xml.getFormatVersion().getOfficeVersion(), xml);

    }

    /**

     * Returns the instance that match the requested version.

     *

     * @param version the version.

     * @return the corresponding instance, <code>null</code> for unsupported versions.

     * @see #LAST_FOR_UNKNOWN_PROP

     */

    public static OOXML get(XMLFormatVersion version) {

        return get(version, Boolean.getBoolean(LAST_FOR_UNKNOWN_PROP));

    }

    public static OOXML get(XMLFormatVersion version, final boolean lastForUnknown) {

        if (version.getXMLVersion() == XMLVersion.OOo) {

            return instanceOO;

        } else {

            final XML_OD res = instancesODByVersion.get(version.getOfficeVersion());

            if (res == null && lastForUnknown)

                return getLast(version.getXMLVersion());

            else

                return res;

        }

    }

    public static OOXML get(Element root) {

        return XMLFormatVersion.get(root).getXML();

    }

    /**

     * Return all known instances in the order they were published.

     *

     * @return all known instances ordered.

     * @see #compareTo(OOXML)

     */

    static public final List<OOXML> values() {

        return values;

    }

    static public final OOXML getLast() {

        return CollectionUtils.getLast(values);

    }

    static public final OOXML getLast(XMLVersion version) {

        if (version == XMLVersion.OOo)

            return instanceOO;

        else

            return instancesODByDate.get(instancesODByDate.lastKey());

    }

    public static void setDefault(OOXML ns) {

        defaultInstance = ns;

    }

    public static OOXML getDefault() {

        return defaultInstance;

    }

    static private final String rt2oo(String content, String tagName, String styleName) {

        return content.replaceAll("\\[" + tagName + "\\]", "<text:span text:style-name=\"" + styleName + "\">").replaceAll("\\[/" + tagName + "\\]", "</text:span>");

    }

    // from OpenDocument-v1.2-schema.rng : a coordinate is a length

    static private final BigDecimal parseCoordinate(final Element elem, final String attrName, final Namespace ns, LengthUnit unit) {

        return parseLength(elem, attrName, ns, unit);

    }

    static private final BigDecimal parseLength(final Element elem, final String attrName, final Namespace ns, LengthUnit unit) {

        final String attr = elem.getAttributeValue(attrName, ns);

        if (attr == null)

            return null;

        return LengthUnit.parseLength(attr, unit);

    }

    // *** instances

    private final XMLFormatVersion version;

    private final String dateString;

    private OOXML(XMLFormatVersion version, final String dateString) {

        this.version = version;

        this.dateString = dateString;

    }

    /**

     * The date the specification was published.

     *

     * @return the date in "yyyyMMdd" format.

     */

    public final String getDateString() {

        return this.dateString;

    }

    /**

     * Compare the date the specification was published.

     *

     * @param o the object to be compared.

     * @see #getDateString()

     */

    @Override

    public int compareTo(OOXML o) {

        return this.dateString.compareTo(o.dateString);

    }

    public final XMLVersion getVersion() {

        return this.getFormatVersion().getXMLVersion();

    }

    public final XMLFormatVersion getFormatVersion() {

        return this.version;

    }

    public abstract boolean canValidate();

    /**

     * Verify that the passed document is a valid OpenOffice.org 1 or ODF document.

     *

     * @param doc the xml to test.

     * @return a validator on <code>doc</code>.

     */

    public abstract Validator getValidator(Document doc);

    /**

     * Return the names of font face declarations.

     *

     * @return at index 0 the name of the container element, at 1 the qualified name of its

     *         children.

     */

    public abstract String[] getFontDecls();

    public final Element getLineBreak() {

        return new Element("line-break", getVersion().getTEXT());

    }

    public abstract Element getTab();

    public abstract String getFrameQName();

    public abstract Element createFormattingProperties(final String family);

    protected final List encodeRT_L(String content, Map<String, String> styles) {

        String res = JDOMUtils.OUTPUTTER.escapeElementEntities(content);

        for (final Entry<String, String> e : styles.entrySet()) {

            res = rt2oo(res, e.getKey(), e.getValue());

        }

        try {

            return JDOMUtils.parseString(res, getVersion().getALL());

        } catch (JDOMException e) {

            // should not happpen as we did escapeElementEntities which gives valid xml and then

            // rt2oo which introduce only static xml

            throw new IllegalStateException("could not parse " + res, e);

        }

    }

    /**

     * Convert rich text (with [] tags) into XML.

     *

     * @param content the string to convert, eg "texte [b]gras[/b]".

     * @param styles the mapping from tagname (eg "b") to the name of the character style (eg

     *        "Gras").

     * @return the corresponding element.

     */

    public final Element encodeRT(String content, Map<String, String> styles) {

        return new Element("span", getVersion().getTEXT()).addContent(encodeRT_L(content, styles));

    }

    // create the necessary <text:s c="n"/>

    private Element createSpaces(String spacesS) {

        return new Element("s", getVersion().getTEXT()).setAttribute("c", spacesS.length() + "", getVersion().getTEXT());

    }

    /**

     * Encode a String to OO XML. Handles substition of whitespaces to their OO equivalent.

     *

     * @param s a plain ole String, eg "term\tdefinition".

     * @return an Element suitable to be inserted in an OO XML document, eg

     *

     *         <pre>

     *     <text:span>term<text:tab-stop/>definition</text:span>

     * </pre>

     *

     *         .

     */

    public final Element encodeWS(final String s) {

        return new Element("span", getVersion().getTEXT()).setContent(encodeWSasList(s));

    }

    public final List<Content> encodeWSasList(final String s) {

        final List<Content> res = new ArrayList<Content>();

        final Matcher m = Pattern.compile("\n|\t| {2,}").matcher(s);

        int last = 0;

        while (m.find()) {

            res.add(new Text(s.substring(last, m.start())));

            switch (m.group().charAt(0)) {

            case '\n':

                res.add(getLineBreak());

                break;

            case '\t':

                res.add(getTab());

                break;

            case ' ':

                res.add(createSpaces(m.group()));

                break;

            default:

                throw new IllegalStateException("unknown item: " + m.group());

            }

            last = m.end();

        }

        res.add(new Text(s.substring(last)));

        return res;

    }

    @SuppressWarnings("unchecked")

    public final void encodeWS(final Text t) {

        final Parent parent = t.getParent();

        final int ind = parent.indexOf(t);

        t.detach();

        parent.getContent().addAll(ind, encodeWSasList(t.getText()));

    }

    @SuppressWarnings("unchecked")

    public final Element encodeWS(final Element elem) {

        final XPath path;

        try {

            path = OOUtils.getXPath(".//text()", getVersion());

        } catch (JDOMException e) {

            // static path, hence always valid

            throw new IllegalStateException("cannot create XPath", e);

        }

        try {

            final Iterator iter = new ArrayList(path.selectNodes(elem)).iterator();

            while (iter.hasNext()) {

                final Text t = (Text) iter.next();

                encodeWS(t);

            }

        } catch (JDOMException e) {

            throw new IllegalArgumentException("cannot find text nodes of " + elem, e);

        }

        return elem;

    }

    /**

     * Return the coordinates of the top-left and bottom-right of the passed shape.

     *

     * @param elem an XML element.

     * @param unit the unit of the returned numbers.

     * @return an array of 4 numbers, <code>null</code> if <code>elem</code> is not a shape, numbers

     *         themselves are never <code>null</code>.

     */

    public final BigDecimal[] getCoordinates(Element elem, LengthUnit unit) {

        return this.getCoordinates(elem, unit, true, true);

    }

    /**

     * Return the coordinates of the top-left and bottom-right of the passed shape.

     *

     * @param elem an XML element.

     * @param unit the unit of the returned numbers.

     * @param horizontal <code>true</code> if the x coordinates should be computed,

     *        <code>false</code> meaning items 0 and 2 of the result are <code>null</code>.

     * @param vertical <code>true</code> if the y coordinates should be computed, <code>false</code>

     *        meaning items 1 and 3 of the result are <code>null</code>.

     * @return an array of 4 numbers, <code>null</code> if <code>elem</code> is not a shape, numbers

     *         themselves are only <code>null</code> if requested with <code>horizontal</code> or

     *         <code>vertical</code>.

     */

    public final BigDecimal[] getCoordinates(Element elem, LengthUnit unit, final boolean horizontal, final boolean vertical) {

        return getCoordinates(elem, getVersion().getNS("svg"), unit, horizontal, vertical);

    }

    static private final BigDecimal[] getCoordinates(Element elem, final Namespace svgNS, LengthUnit unit, final boolean horizontal, final boolean vertical) {

        if (elem.getName().equals("g") && elem.getNamespacePrefix().equals("draw")) {

            // put below if to allow null to be returned by getLocalCoordinates() if elem isn't a

            // shape

            if (!horizontal && !vertical)

                return new BigDecimal[] { null, null, null, null };

            // an OpenDocument group (of shapes) doesn't have any coordinates nor any width and

            // height so iterate through its components to find its coordinates

            BigDecimal minX = null, minY = null;

            BigDecimal maxX = null, maxY = null;

            for (final Object c : elem.getChildren()) {

                final Element child = (Element) c;

                final BigDecimal[] childCoord = getCoordinates(child, svgNS, unit, horizontal, vertical);

                // e.g. <office:event-listeners>, <svg:desc>, <svg:title>

                if (childCoord != null) {

                    {

                        final BigDecimal x = childCoord[0];

                        final BigDecimal x2 = childCoord[2];

                        if (x != null) {

                            assert x2 != null;

                            if (minX == null || x.compareTo(minX) < 0)

                                minX = x;

                            if (maxX == null || x2.compareTo(maxX) > 0)

                                maxX = x2;

                        }

                    }

                    {

                        final BigDecimal y = childCoord[1];

                        final BigDecimal y2 = childCoord[3];

                        if (y != null) {

                            assert y2 != null;

                            if (minY == null || y.compareTo(minY) < 0)

                                minY = y;

                            if (maxY == null || y2.compareTo(maxY) > 0)

                                maxY = y2;

                        }

                    }

                }

            }

            // works because we check above if both horizontal and vertical are false

            if (minX == null && minY == null)

                throw new IllegalArgumentException("Empty group : " + JDOMUtils.output(elem));

            return new BigDecimal[] { minX, minY, maxX, maxY };

        } else {

            return getLocalCoordinates(elem, svgNS, unit, horizontal, vertical);

        }

    }

    // return null if elem isn't a shape (no x/y or no width/height)

    // BigDecimal null if and only if horizontal/vertical is false

    static private final BigDecimal[] getLocalCoordinates(Element elem, final Namespace svgNS, LengthUnit unit, final boolean horizontal, final boolean vertical) {

        final BigDecimal x = parseCoordinate(elem, "x", svgNS, unit);

        final BigDecimal x1 = parseCoordinate(elem, "x1", svgNS, unit);

        if (x == null && x1 == null)

            return null;

        final BigDecimal y = parseCoordinate(elem, "y", svgNS, unit);

        final BigDecimal y1 = parseCoordinate(elem, "y1", svgNS, unit);

        if (y == null && y1 == null)

            throw new IllegalArgumentException("Have x but missing y in " + JDOMUtils.output(elem));

        final BigDecimal startX;

        final BigDecimal endX;

        if (horizontal) {

            if (x == null) {

                startX = x1;

                endX = parseCoordinate(elem, "x2", svgNS, unit);

            } else {

                startX = x;

                final BigDecimal width = parseLength(elem, "width", svgNS, unit);

                endX = width == null ? null : startX.add(width);

            }

            // return null if there's no second coordinate (it's a point)

            if (endX == null)

                return null;

        } else {

            startX = null;

            endX = null;

        }

        final BigDecimal startY;

        final BigDecimal endY;

        if (vertical) {

            if (y == null) {

                startY = y1;

                endY = parseCoordinate(elem, "y2", svgNS, unit);

            } else {

                startY = y;

                final BigDecimal height = parseLength(elem, "height", svgNS, unit);

                endY = height == null ? null : startY.add(height);

            }

            // return null if there's no second coordinate (it's a point)

            if (endY == null)

                return null;

        } else {

            startY = null;

            endY = null;

        }

        return new BigDecimal[] { startX, startY, endX, endY };

    }

    private static final class XML_OO extends OOXML {

        public XML_OO() {

            super(XMLFormatVersion.getOOo(), "20020501");

        }

        @Override

        public boolean canValidate() {

            return true;

        }

        @Override

        public Validator getValidator(Document doc) {

            // DTDs are stubborn, xmlns have to be exactly where they want

            // in this case the root element

            for (final Namespace n : getVersion().getALL())

                doc.getRootElement().addNamespaceDeclaration(n);

            return new Validator.DTDValidator(doc, OOUtils.getBuilderLoadDTD());

        }

        @Override

        public String[] getFontDecls() {

            return new String[] { "font-decls", "style:font-decl" };

        }

        @Override

        public final Element getTab() {

            return new Element("tab-stop", getVersion().getTEXT());

        }

        @Override

        public String getFrameQName() {

            return "draw:text-box";

        }

        @Override

        public Element createFormattingProperties(String family) {

            return new Element("properties", this.getVersion().getSTYLE());

        }

    }

    private static class XML_OD extends OOXML {

        private final String schemaFile;

        private Schema schema = null;

        public XML_OD(final String dateString, final String versionString, final String schemaFile) {

            super(XMLFormatVersion.get(XMLVersion.OD, versionString), dateString);

            this.schemaFile = schemaFile;

        }

        @Override

        public boolean canValidate() {

            return this.schemaFile != null;

        }

        private Schema getSchema() throws SAXException {

            if (this.schema == null && this.schemaFile != null) {

                this.schema = SchemaFactory.newInstance(XMLConstants.RELAXNG_NS_URI).newSchema(getClass().getResource("oofficeDTDs/" + this.schemaFile));

            }

            return this.schema;

        }

        @Override

        public Validator getValidator(Document doc) {

            final Schema schema;

            try {

                schema = this.getSchema();

            } catch (SAXException e) {

                throw new IllegalStateException("relaxNG schemas pb", e);

            }

            return schema == null ? null : new Validator.JAXPValidator(doc, schema);

        }

        @Override

        public final String[] getFontDecls() {

            return new String[] { "font-face-decls", "style:font-face" };

        }

        @Override

        public final Element getTab() {

            return new Element("tab", getVersion().getTEXT());

        }

        @Override

        public String getFrameQName() {

            return "draw:frame";

        }

        @Override

        public Element createFormattingProperties(String family) {

            return new Element(family + "-properties", this.getVersion().getSTYLE());

        }

    }

    private static final class XML_OD_1_0 extends XML_OD {

        public XML_OD_1_0() {

            super("20061130", "1.0", null);

        }

    }

    private static final class XML_OD_1_1 extends XML_OD {

        public XML_OD_1_1() {

            super("20070201", "1.1", "OpenDocument-strict-schema-v1.1.rng");

        }

    }

    private static final class XML_OD_1_2 extends XML_OD {

        public XML_OD_1_2() {

            super("20110317", "1.2", "OpenDocument-v1.2-schema.rng");

        }

    }

}