protected void encodeColumnHeader(FacesContext context, DataTable table, UIColumn column)
throws IOException {
if (!column.isRendered()) {
return;
}
ResponseWriter writer = context.getResponseWriter();
String clientId = column.getContainerClientId(context);
Object tableSortBy = table.getSortBy();
Object columnSortBy = column.getSortBy();
boolean isSortable = columnSortBy != null;
boolean hasFilter = column.getFilterBy() != null;
String selectionMode = column.getSelectionMode();
String sortIcon = null;
boolean resizable = table.isResizableColumns() && column.isResizable();
String columnClass =
isSortable
? DataTable.COLUMN_HEADER_CLASS + " " + DataTable.SORTABLE_COLUMN_CLASS
: DataTable.COLUMN_HEADER_CLASS;
columnClass = hasFilter ? columnClass + " " + DataTable.FILTER_COLUMN_CLASS : columnClass;
columnClass =
selectionMode != null ? columnClass + " " + DataTable.SELECTION_COLUMN_CLASS : columnClass;
columnClass = resizable ? columnClass + " " + DataTable.RESIZABLE_COLUMN_CLASS : columnClass;
columnClass =
column.getStyleClass() != null ? columnClass + " " + column.getStyleClass() : columnClass;
if (isSortable) {
if (tableSortBy != null) {
if (table.isMultiSort()) {
List<SortMeta> sortMeta = table.getMultiSortMeta();
if (sortMeta != null) {
for (SortMeta meta : sortMeta) {
sortIcon =
resolveDefaultSortIcon(
columnSortBy, meta.getColumn().getSortBy(), meta.getSortOrder().name());
if (sortIcon != null) {
break;
}
}
}
} else {
sortIcon = resolveDefaultSortIcon(columnSortBy, tableSortBy, table.getSortOrder());
}
}
if (sortIcon == null) sortIcon = DataTable.SORTABLE_COLUMN_ICON_CLASS;
else columnClass += " ui-state-active";
}
String style = column.getStyle();
String width = column.getWidth();
if (width != null) {
String unit = width.endsWith("%") ? "" : "px";
if (style != null) style = style + ";width:" + width + unit;
else style = "width:" + width + unit;
}
writer.startElement("th", null);
writer.writeAttribute("id", clientId, null);
writer.writeAttribute("class", columnClass, null);
writer.writeAttribute("role", "columnheader", null);
if (style != null) writer.writeAttribute("style", style, null);
if (column.getRowspan() != 1) writer.writeAttribute("rowspan", column.getRowspan(), null);
if (column.getColspan() != 1) writer.writeAttribute("colspan", column.getColspan(), null);
if (hasFilter) {
table.enableFiltering();
String filterPosition = column.getFilterPosition();
if (filterPosition.equals("bottom")) {
encodeColumnHeaderContent(context, column, sortIcon);
encodeFilter(context, table, column);
} else if (filterPosition.equals("top")) {
encodeFilter(context, table, column);
encodeColumnHeaderContent(context, column, sortIcon);
} else {
throw new FacesException(
filterPosition
+ " is an invalid option for filterPosition, valid values are 'bottom' or 'top'.");
}
} else {
encodeColumnHeaderContent(context, column, sortIcon);
}
if (selectionMode != null && selectionMode.equalsIgnoreCase("multiple")) {
encodeCheckbox(context, table, false, column.isDisabledSelection(), HTML.CHECKBOX_ALL_CLASS);
}
writer.endElement("th");
}
