source: josm/trunk/src/org/openstreetmap/josm/gui/dialogs/relation/TagEditorModel.java@ 1916

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.gui.dialogs.relation;

import static org.openstreetmap.josm.tools.I18n.trn;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.logging.Logger;

import javax.swing.table.AbstractTableModel;

import org.openstreetmap.josm.command.ChangePropertyCommand;
import org.openstreetmap.josm.command.Command;
import org.openstreetmap.josm.command.SequenceCommand;
import org.openstreetmap.josm.data.osm.OsmPrimitive;


/**
 * TagEditorModel is a table model.
 *
 *
 * @author gubaer
 *
 */
@SuppressWarnings("serial")
public class TagEditorModel extends AbstractTableModel {
    static private final Logger logger = Logger.getLogger(TagEditorModel.class.getName());

    static public final String PROP_DIRTY = TagEditorModel.class.getName() + ".dirty";

    /** the list holding the tags */
    private  ArrayList<TagModel> tags = null;

    /** indicates whether the model is dirty */
    private boolean dirty =  false;
    private PropertyChangeSupport propChangeSupport = null;

    /**
     * constructor
     */
    public TagEditorModel(){
        tags = new ArrayList<TagModel>();
        propChangeSupport = new PropertyChangeSupport(this);
    }

    public void addPropertyChangeListener(PropertyChangeListener listener) {
        propChangeSupport.addPropertyChangeListener(listener);
    }

    public void removeProperyChangeListener(PropertyChangeListener listener) {
        propChangeSupport.removePropertyChangeListener(listener);
    }

    protected void fireDirtyStateChanged(final boolean oldValue, final boolean newValue) {
        propChangeSupport.firePropertyChange(PROP_DIRTY, oldValue, newValue);
    }

    protected void setDirty(boolean newValue) {
        boolean oldValue = dirty;
        dirty = newValue;
        if (oldValue != newValue) {
            fireDirtyStateChanged(oldValue, newValue);
        }
    }

    public int getColumnCount() {
        return 2;
    }

    public int getRowCount() {
        return tags.size();
    }

    public Object getValueAt(int rowIndex, int columnIndex) {
        if (rowIndex >= getRowCount())
            throw new IndexOutOfBoundsException("unexpected rowIndex: rowIndex=" + rowIndex);

        TagModel tag = tags.get(rowIndex);
        switch(columnIndex) {
        case 0:
        case 1: return tag;

        default:
            throw new IndexOutOfBoundsException("unexpected columnIndex: columnIndex=" + columnIndex);
        }
    }


    /**
     * removes all tags in the model
     */
    public void clear() {
        tags.clear();
        setDirty(true);
        fireTableDataChanged();
    }

    /**
     * adds a tag to the model
     *
     * @param tag the tag. Must not be null.
     *
     * @exception IllegalArgumentException thrown, if tag is null
     */
    public void add(TagModel tag) {
        if (tag == null)
            throw new IllegalArgumentException("argument 'tag' must not be null");
        tags.add(tag);
        setDirty(true);
        fireTableDataChanged();
    }


    public void prepend(TagModel tag) {
        if (tag == null)
            throw new IllegalArgumentException("argument 'tag' must not be null");
        tags.add(0, tag);
        setDirty(true);
        fireTableDataChanged();
    }


    /**
     * adds a tag given by a name/value pair to the tag editor model.
     *
     * If there is no tag with name <code>name</name> yet, a new {@link TagModel} is created
     * and append to this model.
     *
     * If there is a tag with name <code>name</name>, <code>value</code> is merged to the list
     * of values for this tag.
     *
     * @param name the name; converted to "" if null
     * @param value the value; converted to "" if null
     */
    public void add(String name, String value) {
        name = (name == null) ? "" : name;
        value = (value == null) ? "" : value;

        TagModel tag = get(name);
        if (tag == null) {
            tag = new TagModel(name, value);
            add(tag);
        } else {
            tag.addValue(value);
        }
        setDirty(true);
    }


    /**
     * replies the tag with name <code>name</code>; null, if no such tag exists
     * @param name the tag name
     * @return the tag with name <code>name</code>; null, if no such tag exists
     */
    public TagModel get(String name) {
        name = (name == null) ? "" : name;
        for (TagModel tag : tags) {
            if (tag.getName().equals(name))
                return tag;
        }
        return null;
    }

    public TagModel get(int idx) {
        TagModel tagModel = tags.get(idx);
        return tagModel;
    }



    @Override public boolean isCellEditable(int row, int col) {
        // all cells are editable
        return true;
    }


    /**
     * deletes the names of the tags given by tagIndices
     *
     * @param tagIndices a list of tag indices
     */
    public void deleteTagNames(int [] tagIndices) {
        if (tags == null)
            return;
        for (int tagIdx : tagIndices) {
            TagModel tag = tags.get(tagIdx);
            if (tag != null) {
                tag.setName("");
            }
        }
        fireTableDataChanged();
        setDirty(true);
    }

    /**
     * deletes the values of the tags given by tagIndices
     *
     * @param tagIndices the lit of tag indices
     */
    public void deleteTagValues(int [] tagIndices) {
        if (tags == null)
            return;
        for (int tagIdx : tagIndices) {
            TagModel tag = tags.get(tagIdx);
            if (tag != null) {
                tag.setValue("");
            }
        }
        fireTableDataChanged();
        setDirty(true);
    }

    /**
     * deletes the tags given by tagIndices
     *
     * @param tagIndices the list of tag indices
     */
    public void deleteTags(int [] tagIndices) {
        if (tags == null)
            return;
        ArrayList<TagModel> toDelete = new ArrayList<TagModel>();
        for (int tagIdx : tagIndices) {
            TagModel tag = tags.get(tagIdx);
            if (tag != null) {
                toDelete.add(tag);
            }
        }
        for (TagModel tag : toDelete) {
            tags.remove(tag);
        }
        fireTableDataChanged();
        setDirty(true);
    }


    /**
     * creates a new tag and appends it to the model
     */
    public void appendNewTag() {
        TagModel tag = new TagModel();
        tags.add(tag);
        fireTableDataChanged();
        setDirty(true);
    }

    /**
     * makes sure the model includes at least one (empty) tag
     */
    public void ensureOneTag() {
        if (tags.size() == 0) {
            appendNewTag();
        }
    }

    /**
     * initializes the model with the tags of an OSM primitive
     *
     * @param primitive the OSM primitive
     */
    public void initFromPrimitive(OsmPrimitive primitive) {
        clear();
        for (String key : primitive.keySet()) {
            String value = primitive.get(key);
            add(key,value);
        }
        TagModel tag = new TagModel();
        sort();
        tags.add(tag);
        setDirty(false);
    }

    /**
     * applies the current state of the tag editor model to a primitive
     *
     * @param primitive the primitive
     *
     */
    public void applyToPrimitive(OsmPrimitive primitive) {
        primitive.removeAll();
        for (TagModel tag: tags) {
            // tag still holds an unchanged list of different values for the same key.
            // no property change command required
            if (tag.getValueCount() > 1) {
                continue;
            }

            // tag name holds an empty key. Don't apply it to the selection.
            //
            if (tag.getName().trim().equals("")) {
                continue;
            }
            primitive.put(tag.getName(), tag.getValue());
        }
    }

    /**
     * checks whether the tag model includes a tag with a given key
     *
     * @param key  the key
     * @return true, if the tag model includes the tag; false, otherwise
     */
    public boolean includesTag(String key) {
        if (key == null) return false;
        for (TagModel tag : tags) {
            if (tag.getName().equals(key))
                return true;
        }
        return false;
    }


    protected Command createUpdateTagCommand(Collection<OsmPrimitive> primitives, TagModel tag) {

        // tag still holds an unchanged list of different values for the same key.
        // no property change command required
        if (tag.getValueCount() > 1)
            return null;

        // tag name holds an empty key. Don't apply it to the selection.
        //
        if (tag.getName().trim().equals(""))
            return null;

        String newkey = tag.getName();
        String newvalue = tag.getValue();

        ChangePropertyCommand command = new ChangePropertyCommand(primitives,newkey, newvalue);
        return command;
    }

    protected Command createDeleteTagsCommand(Collection<OsmPrimitive> primitives) {

        List<String> currentkeys = getKeys();
        ArrayList<Command> commands = new ArrayList<Command>();

        for (OsmPrimitive primitive : primitives) {
            for (String oldkey : primitive.keySet()) {
                if (!currentkeys.contains(oldkey)) {
                    ChangePropertyCommand deleteCommand =
                        new ChangePropertyCommand(primitive,oldkey,null);
                    commands.add(deleteCommand);
                }
            }
        }

        SequenceCommand command = new SequenceCommand(
                trn("Remove old keys from up to {0} object", "Remove old keys from up to {0} objects", primitives.size(), primitives.size()),
                commands
        );

        return command;
    }

    /**
     * replies the list of keys of the tags managed by this model
     *
     * @return the list of keys managed by this model
     */
    public List<String> getKeys() {
        ArrayList<String> keys = new ArrayList<String>();
        for (TagModel tag: tags) {
            if (!tag.getName().trim().equals("")) {
                keys.add(tag.getName());
            }
        }
        return keys;
    }

    /**
     * sorts the current tags according alphabetical order of names
     */
    protected void sort() {
        java.util.Collections.sort(
                tags,
                new Comparator<TagModel>() {
                    public int compare(TagModel self, TagModel other) {
                        return self.getName().compareTo(other.getName());
                    }
                }
        );
    }

    /**
     * updates the name of a tag and sets the dirty state to  true if
     * the new name is different from the old name.
     *
     * @param tag   the tag
     * @param newName  the new name
     */
    public void updateTagName(TagModel tag, String newName) {
        String oldName = tag.getName();
        tag.setName(newName);
        if (! newName.equals(oldName)) {
            setDirty(true);
        }
    }

    /**
     * updates the value value of a tag and sets the dirty state to true if the
     * new name is different from the old name
     *
     * @param tag  the tag
     * @param newValue  the new value
     */
    public void updateTagValue(TagModel tag, String newValue) {
        String oldValue = tag.getValue();
        tag.setValue(newValue);
        if (! newValue.equals(oldValue)) {
            setDirty(true);
        }
    }

    /**
     * replies true, if this model has been updated
     *
     * @return true, if this model has been updated
     */
    public boolean isDirty() {
        return dirty;
    }
}