package org.jboss.ballroom.client.widgets.forms;
import com.google.gwt.cell.client.AbstractCell;
import com.google.gwt.cell.client.Cell;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style;
import com.google.gwt.safehtml.client.SafeHtmlTemplates;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.cellview.client.CellTable;
import com.google.gwt.user.cellview.client.Column;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Widget;
import java.util.ArrayList;
import java.util.List;
/**
* @author Heiko Braun
* @date 11/9/11
*/
public class PlainFormView {
private static final FormItemTableResources DEFAULT_CELL_TABLE_RESOURCES =
new FormItemTableResources();
private final String id = "formview-"+ DOM.createUniqueId()+"_";
private CellTable<Row> table;
private List<FormItem> items;
private List<Row> rows;
private int numColumns = 2;
private boolean hasEntity = false;
private final static String EMPTY_STRING = "";
public PlainFormView(List<FormItem> items) {
this.items = items;
}
public void setNumColumns(int numColumns) {
this.numColumns = numColumns;
}
public Widget asWidget(RenderMetaData metaData) {
table = new CellTable<Row>(20, DEFAULT_CELL_TABLE_RESOURCES);
table.setStyleName("form-item-table");
// see http://www.w3.org/TR/wai-aria/roles#group
// ... when a group is used in the context of list, authors MUST limit its children to listitem elements
// table.getElement().setAttribute("role", "group");
for(int col = 0; col<numColumns; col++)
{
final int currentCol = col;
Column titleCol = new Column<Row, String>(new TitleCell(currentCol)) {
@Override
public String getValue(Row row) {
FormItem item = row.get(currentCol);
return item!=null ? item.getTitle() : "";
}
};
Column valueCol = new Column<Row, String>(new ValueCell(currentCol)) {
@Override
public String getValue(Row row) {
FormItem item = row.get(currentCol);
return item!=null ? valueRepresentation(item) : "";
}
};
if(numColumns==1)
{
table.setColumnWidth(titleCol, 20, Style.Unit.PCT);
table.setColumnWidth(valueCol, 80, Style.Unit.PCT);
}
else
{
// default columns layout
int colWidth = 100/(numColumns*2);
table.setColumnWidth(titleCol, colWidth-10, Style.Unit.PCT);
table.setColumnWidth(valueCol, colWidth + 10, Style.Unit.PCT);
}
table.addColumn(titleCol);
table.addColumn(valueCol);
}
//table.setTableLayoutFixed(true);
table.setEmptyTableWidget(new HTML());
table.setLoadingIndicator(new HTML());
rows = groupItems();
return table;
}
private String valueRepresentation(FormItem item) {
String represenation = null;
Object value = item.getValue();
if(item.isUndefined())
{
represenation = EMPTY_STRING;
}
else if(hasEntity && item.isExpressionValue())
{
represenation = String.valueOf(item.asExpressionValue());
}
else if(hasEntity && (item instanceof PasswordBoxItem))
{
// hide passwords
StringBuffer sb = new StringBuffer();
String plainText = String.valueOf(value);
for(int i=0; i<plainText.length(); i++)
sb.append("*");
represenation = sb.toString();
}
else if(hasEntity && (value instanceof Boolean))
{
String booleanFallback = hasEntity ? "false" : EMPTY_STRING;
represenation = (Boolean)value ? "true" : booleanFallback;
}
else
{
represenation = hasEntity ? String.valueOf(value) : EMPTY_STRING;
}
return represenation;
}
public void refresh(boolean hasEntity) {
this.hasEntity = hasEntity; // changes the display style (no entity at all != empty entity)
table.setRowCount(rows.size(), true);
table.setRowData(rows);
}
private List<Row> groupItems() {
List<Row> rows = new ArrayList<Row>();
int i=0;
while(i<items.size())
{
FormItem[] itemsPerRow = new FormItem[numColumns];
for(int col=0; col<numColumns;col++)
{
if(i+col>=items.size())
itemsPerRow[col] = null;
else
itemsPerRow[col] = items.get(i+col);
}
rows.add(new Row(i, itemsPerRow));
i+=numColumns;
}
return rows;
}
private final class Row {
FormItem[] items;
private int rowNum;
Row(int rowNum, FormItem... items) {
this.rowNum = rowNum;
this.items = items;
}
public FormItem get(int i) {
return items[i];
}
public int getRowNum() {
return rowNum;
}
}
interface Template extends SafeHtmlTemplates {
@Template("<div class='form-item-title' style='outline:none;' id='{0}'>{1}: </div>")
SafeHtml render(String id, String title);
}
interface ValueTemplate extends SafeHtmlTemplates {
@Template("<span aria-labelledBy='{0}'>{1}</span>")
SafeHtml render(String id, String title);
}
private static final Template TEMPLATE = GWT.create(Template.class);
private static final ValueTemplate VALUE_TEMPLATE = GWT.create(ValueTemplate.class);
private class TitleCell extends AbstractCell<String> {
private int index;
public TitleCell(int index) {
super();
this.index = index;
}
@Override
public void render(
Cell.Context context,
String title,
SafeHtmlBuilder safeHtmlBuilder)
{
Row row = (Row)context.getKey();
final String labelId = id + row.getRowNum() +"_"+index+"_l";
boolean hasTitle = title!=null && !title.equals("");
SafeHtml render = hasTitle ? TEMPLATE.render(labelId, title) : new SafeHtmlBuilder().toSafeHtml();
safeHtmlBuilder.append(render);
}
}
private class ValueCell extends AbstractCell<String> {
private int index;
private ValueCell(int index) {
super();
this.index = index;
}
@Override
public void render(
Cell.Context context,
String value,
SafeHtmlBuilder safeHtmlBuilder)
{
Row row = (Row)context.getKey();
final String labelId = id + row.getRowNum() +"_"+index+"_l";
boolean hasValue = value!=null && !value.equals("");
SafeHtml render = hasValue ? VALUE_TEMPLATE.render(labelId, value) : new SafeHtmlBuilder().toSafeHtml();
safeHtmlBuilder.append(render);
}
}
}