001// Copyright 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry.wml; 016 017import org.apache.hivemind.HiveMind; 018import org.apache.tapestry.IForm; 019import org.apache.tapestry.IMarkupWriter; 020import org.apache.tapestry.IRequestCycle; 021import org.apache.tapestry.form.FormEventType; 022import org.apache.tapestry.form.FormSupportImpl; 023 024/** 025 * Subclass of {@link org.apache.tapestry.form.FormSupportImpl} that adjusts the output markup 026 * to conform to WML. 027 * 028 * @author Howard M. Lewis Ship 029 * @since 4.0 030 */ 031public class GoFormSupportImpl extends FormSupportImpl 032{ 033 public GoFormSupportImpl(IMarkupWriter writer, IRequestCycle cycle, IForm form) 034 { 035 super(writer, cycle, form); 036 } 037 038 protected void writeTag(IMarkupWriter writer, String method, String url) 039 { 040 writer.begin("go"); 041 writer.attribute("method", method); 042 writer.attribute("href", url); 043 } 044 045 protected void writeHiddenFields() 046 { 047 // The super-implementation writes a <div> tag that's not 048 // valid as WML. 049 050 writeHiddenFieldList(); 051 } 052 053 protected void writeHiddenField(IMarkupWriter writer, String name, String id, String value) 054 { 055 writer.beginEmpty("postfield"); 056 writer.attribute("name", name); 057 058 if (HiveMind.isNonBlank(id)) 059 writer.attribute("id", id); 060 061 writer.attribute("value", value); 062 writer.println(); 063 } 064 065 public void addEventHandler(FormEventType type, String functionName) 066 { 067 throw new UnsupportedOperationException( 068 "addEventHandler() not supported for WML Go component."); 069 } 070 071 protected void emitEventManagerInitialization() 072 { 073 } 074}