| // Copyright 2004 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry.form; |
| |
| import java.text.DateFormatSymbols; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Calendar; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| import org.apache.tapestry.ApplicationRuntimeException; |
| import org.apache.tapestry.IAsset; |
| import org.apache.tapestry.IEngine; |
| import org.apache.tapestry.IForm; |
| import org.apache.tapestry.IMarkupWriter; |
| import org.apache.tapestry.IRequestCycle; |
| import org.apache.tapestry.IResourceLocation; |
| import org.apache.tapestry.IScript; |
| import org.apache.tapestry.Tapestry; |
| import org.apache.tapestry.engine.IScriptSource; |
| import org.apache.tapestry.html.Body; |
| |
| /** |
| * Provides a Form <tt>java.util.Date</tt> field component for selecting dates. |
| * |
| * [<a href="../../../../../ComponentReference/DatePicker.html">Component Reference</a>] |
| * |
| * @author Paul Geerts |
| * @author Malcolm Edgar |
| * @version $Id$ |
| * @since 2.2 |
| * |
| */ |
| |
| public abstract class DatePicker extends AbstractFormComponent |
| { |
| public abstract String getFormat(); |
| |
| public abstract Date getValue(); |
| |
| public abstract void setValue(Date value); |
| |
| public abstract boolean isDisabled(); |
| |
| public abstract boolean getIncludeWeek(); |
| |
| public abstract IAsset getIcon(); |
| |
| private IScript _script; |
| |
| private static final String SYM_NAME = "name"; |
| private static final String SYM_FORMNAME = "formName"; |
| private static final String SYM_MONTHNAMES = "monthNames"; |
| private static final String SYM_SHORT_MONTHNAMES = "shortMonthNames"; |
| private static final String SYM_WEEKDAYNAMES = "weekDayNames"; |
| private static final String SYM_SHORT_WEEKDAYNAMES = "shortWeekDayNames"; |
| private static final String SYM_FIRSTDAYINWEEK = "firstDayInWeek"; |
| private static final String SYM_MINDAYSINFIRSTWEEK = "minimalDaysInFirstWeek"; |
| private static final String SYM_FORMAT = "format"; |
| private static final String SYM_INCL_WEEK = "includeWeek"; |
| private static final String SYM_VALUE = "value"; |
| private static final String SYM_BUTTONONCLICKHANDLER = "buttonOnclickHandler"; |
| |
| // Output symbol |
| |
| private static final String SYM_BUTTONNAME = "buttonName"; |
| |
| protected void finishLoad() |
| { |
| IEngine engine = getPage().getEngine(); |
| IScriptSource source = engine.getScriptSource(); |
| |
| IResourceLocation location = |
| getSpecification().getSpecificationLocation().getRelativeLocation("DatePicker.script"); |
| |
| _script = source.getScript(location); |
| } |
| |
| protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
| { |
| IForm form = getForm(cycle); |
| |
| String name = form.getElementId(this); |
| |
| String format = getFormat(); |
| |
| if (format == null) |
| format = "dd MMM yyyy"; |
| |
| SimpleDateFormat formatter = new SimpleDateFormat(format, getPage().getLocale()); |
| |
| boolean disabled = isDisabled(); |
| |
| if (!cycle.isRewinding()) |
| { |
| Body body = Body.get(cycle); |
| |
| if (body == null) |
| throw new ApplicationRuntimeException( |
| Tapestry.format("must-be-contained-by-body", "DatePicker"), |
| this, |
| null, |
| null); |
| |
| Locale locale = getPage().getLocale(); |
| DateFormatSymbols dfs = new DateFormatSymbols(locale); |
| Calendar cal = Calendar.getInstance(locale); |
| |
| Date value = getValue(); |
| |
| Map symbols = new HashMap(); |
| |
| symbols.put(SYM_NAME, name); |
| symbols.put(SYM_FORMAT, format); |
| symbols.put(SYM_INCL_WEEK, getIncludeWeek() ? Boolean.TRUE : Boolean.FALSE); |
| |
| symbols.put(SYM_MONTHNAMES, makeStringList(dfs.getMonths(), 0, 12)); |
| symbols.put(SYM_SHORT_MONTHNAMES, makeStringList(dfs.getShortMonths(), 0, 12)); |
| symbols.put(SYM_WEEKDAYNAMES, makeStringList(dfs.getWeekdays(), 1, 8)); |
| symbols.put(SYM_SHORT_WEEKDAYNAMES, makeStringList(dfs.getShortWeekdays(), 1, 8)); |
| symbols.put(SYM_FIRSTDAYINWEEK, new Integer(cal.getFirstDayOfWeek() - 1)); |
| symbols.put(SYM_MINDAYSINFIRSTWEEK, new Integer(cal.getMinimalDaysInFirstWeek())); |
| symbols.put(SYM_FORMNAME, form.getName()); |
| symbols.put(SYM_VALUE, value); |
| |
| _script.execute(cycle, body, symbols); |
| |
| writer.beginEmpty("input"); |
| writer.attribute("type", "text"); |
| writer.attribute("name", name); |
| writer.attribute("title", formatter.toLocalizedPattern()); |
| |
| if (value != null) |
| writer.attribute("value", formatter.format(value)); |
| |
| if (disabled) |
| writer.attribute("disabled", "disabled"); |
| |
| renderInformalParameters(writer, cycle); |
| |
| writer.printRaw(" "); |
| |
| if (!disabled) |
| { |
| writer.begin("a"); |
| writer.attribute("href", (String) symbols.get(SYM_BUTTONONCLICKHANDLER)); |
| } |
| |
| IAsset icon = getIcon(); |
| |
| writer.beginEmpty("img"); |
| writer.attribute("src", icon.buildURL(cycle)); |
| writer.attribute("border", 0); |
| |
| if (!disabled) |
| writer.end(); // <a> |
| |
| } |
| |
| if (form.isRewinding()) |
| { |
| if (disabled) |
| return; |
| |
| String textValue = cycle.getRequestContext().getParameter(name); |
| |
| if (Tapestry.isBlank(textValue)) |
| return; |
| |
| try |
| { |
| Date value = formatter.parse(textValue); |
| |
| setValue(value); |
| } |
| catch (ParseException ex) |
| { |
| } |
| } |
| |
| } |
| |
| /** |
| * Create a list of quoted strings. The list is suitable for |
| * initializing a JavaScript array. |
| */ |
| private String makeStringList(String[] a, int offset, int length) |
| { |
| StringBuffer b = new StringBuffer(); |
| for (int i = offset; i < length; i++) |
| { |
| // JavaScript is sensitive to some UNICODE characters. So for |
| // the sake of simplicity, we just escape everything |
| b.append('"'); |
| char[] ch = a[i].toCharArray(); |
| for (int j = 0; j < ch.length; j++) |
| { |
| if (ch[j] < 128) |
| { |
| b.append(ch[j]); |
| } |
| else |
| { |
| b.append(escape(ch[j])); |
| } |
| } |
| |
| b.append('"'); |
| if (i < length - 1) |
| { |
| b.append(", "); |
| } |
| } |
| return b.toString(); |
| |
| } |
| |
| /** |
| * Create an escaped Unicode character |
| * @param c |
| * @return The unicode character in escaped string form |
| */ |
| private static String escape(char c) |
| { |
| StringBuffer b = new StringBuffer(); |
| for (int i = 0; i < 4; i++) |
| { |
| b.append(Integer.toHexString(c & 0x000F).toUpperCase()); |
| c >>>= 4; |
| } |
| b.append("u\\"); |
| return b.reverse().toString(); |
| } |
| |
| } |