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/*
* Copyright (C) 2004 Baron Schwartz <baron at sequent dot org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation, version 2.1.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* $Revision: 1.1 $
*/
// Shows or hides the date chooser on the page
function showChooser(obj, inputId, divId, start, end, format, isTimeChooser) {
if (document.getElementById) {
var input = document.getElementById(inputId);
var div = document.getElementById(divId);
if (input !== undefined && div !== undefined) {
if (input.DateChooser === undefined) {
input.DateChooser = new DateChooser(input, div, start, end, format, isTimeChooser);
}
input.DateChooser.setDate(Date.parseDate(input.value, format));
if (input.DateChooser.isVisible()) {
input.DateChooser.hide();
}
else {
input.DateChooser.show();
}
}
}
}
// Sets a date on the object attached to 'inputId'
function dateChooserSetDate(inputId, value) {
var input = document.getElementById(inputId);
if (input !== undefined && input.DateChooser !== undefined) {
input.DateChooser.setDate(Date.parseDate(value, input.DateChooser._format));
if (input.DateChooser.isTimeChooser()) {
var theForm = input.form;
var prefix = input.DateChooser._prefix;
input.DateChooser.setTime(
parseInt(theForm.elements[prefix + 'hour'].options[
theForm.elements[prefix + 'hour'].selectedIndex].value)
+ parseInt(theForm.elements[prefix + 'ampm'].options[
theForm.elements[prefix + 'ampm'].selectedIndex].value),
parseInt(theForm.elements[prefix + 'min'].options[
theForm.elements[prefix + 'min'].selectedIndex].value));
}
input.value = input.DateChooser.getValue();
input.DateChooser.hide();
}
}
// The callback function for when someone changes the pulldown menus on the date
// chooser
function dateChooserDateChange(theForm, prefix) {
var input = document.getElementById(
theForm.elements[prefix + 'inputId'].value);
var newDate = new Date(
theForm.elements[prefix + 'year'].options[
theForm.elements[prefix + 'year'].selectedIndex].value,
theForm.elements[prefix + 'month'].options[
theForm.elements[prefix + 'month'].selectedIndex].value,
1);
// Try to preserve the day of month (watch out for months with 31 days)
newDate.setDate(Math.max(1, Math.min(newDate.getDaysInMonth(),
input.DateChooser._date.getDate())));
input.DateChooser.setDate(newDate);
if (input.DateChooser.isTimeChooser()) {
input.DateChooser.setTime(
parseInt(theForm.elements[prefix + 'hour'].options[
theForm.elements[prefix + 'hour'].selectedIndex].value)
+ parseInt(theForm.elements[prefix + 'ampm'].options[
theForm.elements[prefix + 'ampm'].selectedIndex].value),
parseInt(theForm.elements[prefix + 'min'].options[
theForm.elements[prefix + 'min'].selectedIndex].value));
}
input.DateChooser.show();
}
// Gets the absolute position on the page of the element passed in
function getAbsolutePosition(obj) {
var result = [0, 0];
while (obj != null) {
result[0] += obj.offsetTop;
result[1] += obj.offsetLeft;
obj = obj.offsetParent;
}
return result;
}
// DateChooser constructor
function DateChooser(input, div, start, end, format, isTimeChooser) {
this._input = input;
this._div = div;
this._start = start;
this._end = end;
this._format = format;
this._date = new Date();
this._isTimeChooser = isTimeChooser;
// Choose a random prefix for all pulldown menus
this._prefix = "";
var letters = ["a", "b", "c", "d", "e", "f", "h", "i", "j", "k", "l",
"m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
for (var i = 0; i < 10; ++i) {
this._prefix += letters[Math.floor(Math.random() * letters.length)];
}
}
// DateChooser prototype variables
DateChooser.prototype._isVisible = false;
// Returns true if the chooser is currently visible
DateChooser.prototype.isVisible = function() {
return this._isVisible;
}
// Returns true if the chooser is to allow choosing the time as well as the date
DateChooser.prototype.isTimeChooser = function() {
return this._isTimeChooser;
}
// Gets the value, as a formatted string, of the date attached to the chooser
DateChooser.prototype.getValue = function() {
return this._date.dateFormat(this._format);
}
// Hides the chooser
DateChooser.prototype.hide = function() {
this._div.style.visibility = "hidden";
this._div.style.display = "none";
this._div.innerHTML = "";
this._isVisible = false;
}
// Shows the chooser on the page
DateChooser.prototype.show = function() {
// calculate the position before making it visible
var inputPos = getAbsolutePosition(this._input);
this._div.style.top = (inputPos[0] + this._input.offsetHeight) + "px";
this._div.style.left = (inputPos[1] + this._input.offsetWidth) + "px";
this._div.innerHTML = this.createChooserHtml();
this._div.style.display = "block";
this._div.style.visibility = "visible";
this._div.style.position = "absolute";
this._isVisible = true;
}
// Sets the date to what is in the input box
DateChooser.prototype.initializeDate = function() {
if (this._input.value != null && this._input.value != "") {
this._date = Date.parseDate(this._input.value, this._format);
}
else {
this._date = new Date();
}
}
// Sets the date attached to the chooser
DateChooser.prototype.setDate = function(date) {
this._date = date ? date : new Date();
}
// Sets the time portion of the date attached to the chooser
DateChooser.prototype.setTime = function(hour, minute) {
this._date.setHours(hour);
this._date.setMinutes(minute);
}
// Creates the HTML for the whole chooser
DateChooser.prototype.createChooserHtml = function() {
var formHtml = "<input type=\"hidden\" name=\""
+ this._prefix + "inputId\" value=\""
+ this._input.getAttribute('id') + "\">"
+ "\r\n <select name=\"" + this._prefix
+ "month\" onChange=\"dateChooserDateChange(this.form, '"
+ this._prefix + "');\">";
for (var monIndex = 0; monIndex <= 11; monIndex++) {
formHtml += "\r\n <option value=\"" + monIndex + "\""
+ (monIndex == this._date.getMonth() ? " selected=\"1\"" : "")
+ ">" + Date.monthNames[monIndex] + "</option>";
}
formHtml += "\r\n </select>\r\n <select name=\""
+ this._prefix + "year\" onChange=\"dateChooserDateChange(this.form, '"
+ this._prefix + "');\">";
for (var i = this._start; i <= this._end; ++i) {
formHtml += "\r\n <option value=\"" + i + "\""
+ (i == this._date.getFullYear() ? " selected=\"1\"" : "")
+ ">" + i + "</option>";
}
formHtml += "\r\n </select>";
formHtml += this.createCalendarHtml();
if (this._isTimeChooser) {
formHtml += this.createTimeChooserHtml();
}
return formHtml;
}
// Creates the extra HTML needed for choosing the time
DateChooser.prototype.createTimeChooserHtml = function() {
// Add hours
var result = "\r\n <select name=\"" + this._prefix + "hour\">";
for (var i = 0; i < 12; ++i) {
result += "\r\n <option value=\"" + i + "\""
+ (((this._date.getHours() % 12) == i) ? " selected=\"1\">" : ">")
+ i + "</option>";
}
// Add extra entry for 12:00
result += "\r\n <option value=\"0\">12</option>";
result += "\r\n </select>";
// Add minutes
result += "\r\n <select name=\"" + this._prefix + "min\">";
for (var i = 0; i < 60; i += 15) {
result += "\r\n <option value=\"" + i + "\""
+ ((this._date.getMinutes() == i) ? " selected=\"1\">" : ">")
+ String.leftPad(i, 2, '0') + "</option>";
}
result += "\r\n </select>";
// Add AM/PM
result += "\r\n <select name=\"" + this._prefix + "ampm\">";
result += "\r\n <option value=\"0\""
+ (this._date.getHours() < 12 ? " selected=\"1\">" : ">")
+ "AM</option>";
result += "\r\n <option value=\"12\""
+ (this._date.getHours() >= 12 ? " selected=\"1\">" : ">")
+ "PM</option>";
result += "\r\n </select>";
return result;
}
// Creates the HTML for the actual calendar part of the chooser
DateChooser.prototype.createCalendarHtml = function() {
var result = "\r\n<table cellspacing=\"0\" class=\"dateChooser\">"
+ "\r\n <tr><th>S</th><th>M</th><th>T</th>"
+ "<th>W</th><th>T</th><th>F</th><th>S</th></tr>\r\n <tr>";
// Fill up the days of the week until we get to the first day of the month
var firstDay = this._date.getFirstDayOfMonth();
var lastDay = this._date.getLastDayOfMonth();
if (firstDay != 0) {
result += "<td colspan=\"" + firstDay + "\"> </td>";
}
// Fill in the days of the month
var i = 0;
while (i < this._date.getDaysInMonth()) {
if (((i++ + firstDay) % 7) == 0) {
result += "</tr>\r\n <tr>";
}
var thisDay = new Date(
this._date.getFullYear(),
this._date.getMonth(), i);
var js = '"dateChooserSetDate(\''
+ this._input.getAttribute('id') + "', '"
+ thisDay.dateFormat(this._format) + '\');"'
result += "\r\n <td class=\"dateChooserActive"
// If the date is the currently chosen date, highlight it
+ (i == this._date.getDate() ? " dateChooserActiveToday" : "")
+ "\" onClick=" + js + ">" + i + "</td>";
}
// Fill in any days after the end of the month
if (lastDay != 6) {
result += "<td colspan=\"" + (6 - lastDay) + "\"> </td>";
}
return result + "\r\n </tr>\r\n</table><!--[if lte IE 6.5]><iframe></iframe><![endif]-->";
}