001// Copyright 2004, 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.form; 016 017import org.apache.tapestry.IMarkupWriter; 018import org.apache.tapestry.IRequestCycle; 019import org.apache.tapestry.valid.ValidatorException; 020 021/** 022 * Implements a component that manages an HTML <textarea> form element. 023 * 024 * [<a href="../../../../../ComponentReference/TextArea.html">Component Reference</a>] 025 * <p> 026 * As of 4.0, this component can be configurably translated and validated. 027 * 028 * @author Howard Lewis Ship 029 * @author Paul Ferraro 030 */ 031public abstract class TextArea extends AbstractFormComponent implements TranslatedField 032{ 033 public abstract String getValue(); 034 035 public abstract void setValue(String value); 036 037 /** 038 * @see org.apache.tapestry.form.AbstractFormComponent#renderFormComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle) 039 */ 040 protected void renderFormComponent(IMarkupWriter writer, IRequestCycle cycle) 041 { 042 String value = getTranslatedFieldSupport().format(this, getValue()); 043 044 renderDelegatePrefix(writer, cycle); 045 046 writer.begin("textarea"); 047 048 writer.attribute("name", getName()); 049 050 if (isDisabled()) 051 writer.attribute("disabled", "disabled"); 052 053 renderIdAttribute(writer, cycle); 054 055 renderDelegateAttributes(writer, cycle); 056 057 getTranslatedFieldSupport().renderContributions(this, writer, cycle); 058 getValidatableFieldSupport().renderContributions(this, writer, cycle); 059 060 renderInformalParameters(writer, cycle); 061 062 if (value != null) 063 writer.print(value); 064 065 writer.end(); 066 067 renderDelegateSuffix(writer, cycle); 068 } 069 070 /** 071 * @see org.apache.tapestry.form.AbstractFormComponent#rewindFormComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle) 072 */ 073 protected void rewindFormComponent(IMarkupWriter writer, IRequestCycle cycle) 074 { 075 String value = cycle.getParameter(getName()); 076 077 try 078 { 079 String text = (String) getTranslatedFieldSupport().parse(this, value); 080 081 getValidatableFieldSupport().validate(this, writer, cycle, text); 082 083 setValue(text); 084 } 085 catch (ValidatorException e) 086 { 087 getForm().getDelegate().record(e); 088 } 089 } 090 091 /** 092 * Injected. 093 */ 094 public abstract ValidatableFieldSupport getValidatableFieldSupport(); 095 096 /** 097 * Injected. 098 */ 099 public abstract TranslatedFieldSupport getTranslatedFieldSupport(); 100 101 /** 102 * @see org.apache.tapestry.form.AbstractFormComponent#isRequired() 103 */ 104 public boolean isRequired() 105 { 106 return getValidatableFieldSupport().isRequired(this); 107 } 108}