/*
 * @source: https://github.com/validator/validator/blob/main/site/script.js
 *
 * @licstart  The following is the entire license notice for the JavaScript
 * code in this file.
 *
 * Copyright (c) 2005-2007 Henri Sivonen
 * Copyright (c) 2007-2010 Mozilla Foundation
 * Copyright (c) 2007 Simon Pieters
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * @licend  The above is the entire license notice for the JavaScript code
 * in this file.
 *
 */
var hasDuplicateMessages = false
var currentOl = null
var ungroupedOl = null
var groupedOl = null
var urlInput = null
var fileInput = null
var textarea = null
var textareaHidden = null
var dynamicStyle = null
var prevHash = null
var hasTextContent = (createHtmlElement('code').textContent != undefined)

var linePattern = /^#l-?[0-9]+$/
var rangePattern = /^#l-?[0-9]+c[0-9]+$/
var exactPattern = /^#cl-?[0-9]+c[0-9]+$/

function boot() {
	schemaChanged()
	parserChanged()
	installHandlers()
}

function reboot() {
	boot()
	initFieldHolders()
	installDynamicStyle()
	updateFragmentIdHilite()
	window.setInterval(emulateHashChanged, 50)
	initGrouping()
}

function installDynamicStyle() {
	dynamicStyle = createHtmlElement('style')
	document.documentElement.firstChild.appendChild(dynamicStyle)
}

function installHandlers() {
	if (document.forms && document.forms.length) {
		document.forms[0].onsubmit = formSubmission
	}
	var schema = document.getElementById("schema")
	if (schema) {
		schema.onchange = schemaChanged
	}
	var preset = document.getElementById("preset")
	if (preset) {
		preset.onchange = presetChanged
	}
	var parser = document.getElementById("parser")
	if (parser) {
		parser.onchange = parserChanged
	}
}

function initFieldHolders() {
	urlInput = document.getElementById('doc')
	urlInput.setAttribute('aria-labelledby', 'docselect')
	
	textareaHidden = createHtmlElement('input')
	textarea = createHtmlElement('textarea')
	if (textarea && textareaHidden) {
		textareaHidden.type = 'hidden'
		textareaHidden.name = 'content'
		textarea.cols = 72
		textarea.rows = 15
		textarea.id = 'doc'
		textarea.setAttribute('aria-labelledby', 'docselect')
		copySourceIntoTextArea()
		if (textarea.value == '') {
			textarea.value = '<!DOCTYPE html>\n<html lang="">\n<head>\n<title>Test</title>\n</head>\n<body>\n<p></p>\n</body>\n</html>'
    }
	}
	
	fileInput = createHtmlElement('input')
	if (fileInput) {
		fileInput.type = 'file'
		fileInput.id = 'doc'
		fileInput.name = 'file'
		fileInput.setAttribute('aria-labelledby', 'docselect')
	}
	
	var td = urlInput.parentNode
	if (td) {
		var th = td.previousSibling
		var label = th.firstChild
		var modeSelect = createHtmlElement("select")
		modeSelect.id = 'docselect'
		modeSelect.appendChild(createOption('Address', ''))
		modeSelect.appendChild(createOption('File Upload', 'file'))
		modeSelect.appendChild(createOption('Text Field', 'textarea'))
		modeSelect.onchange = function() {
    if (this.value == 'file') {
      installFileUpload()
    }
    else 
      if (this.value == 'textarea') {
        installTextarea()
      }
      else {
        installUrlInput()
      }
		}
		th.replaceChild(modeSelect, label)
	}
	
	if (urlInput.className == 'file') {
	  installFileUpload()
	  modeSelect.value = 'file'
	} else if (urlInput.className == 'textarea') {
	  installTextarea()	
	  modeSelect.value = 'textarea'
	}
}

function createOption(text, value) {
	var rv = createHtmlElement('option')
	rv.value = value
	var tn = document.createTextNode(text)
	rv.appendChild(tn)
	return rv
}

function schemaChanged() {
	var input = document.getElementById("schema")
	var select = document.getElementById("preset")
	if (input) {
		var value = input.value
		if (select) {
			if (select.firstChild) {
				for (var n = select.firstChild; n != null; n = n.nextSibling) {
					if (n.value == value) {
						n.selected = true
						toggleParsers(value)
						return
					}
				}
				select.firstChild.selected = true
				toggleParsers("")
			}
		}
	}
}

function presetChanged() {
	var input = document.getElementById("schema")
	var select = document.getElementById("preset")
	if (input && select) {
		input.value = select.value
	}
	toggleParsers(select.value)
}

function toggleParsers(newValue) {
	var preset = document.getElementById("preset")
	if (preset) {
		if (isHtmlCompatiblePreset(newValue)) {
			var select = document.getElementById("parser")
			if (select) {
				if (select.firstChild) {
					for (var n = select.firstChild; n != null; n = n.nextSibling) {
						n.disabled = false
					}
					if (document.getElementById('doc').name == 'content') {
						// text area case
						if (select.firstChild.selected) {
							select.firstChild.nextSibling.nextSibling.nextSibling.selected = true
							disableById('nsfilter')
						}
						select.firstChild.disabled = true
					}
				}
			}
		}
		else {
			var select = document.getElementById("parser")
			if (select) {
				if (select.firstChild) {
					if (select.firstChild.selected) {
						select.firstChild.nextSibling.selected = true
					}
					for (var n = select.firstChild; n != null; n = n.nextSibling) {
						n.disabled = (n.value == "" || isHtmlParserValue(n.value))
					}
				}
			}
		}
	}
}

function isHtmlParserValue(parser) {
	return (parser.indexOf("html") == 0)
}

function isHtmlCompatiblePreset(preset) {
	return (preset == "" ||
	preset.indexOf("http://s.validator.nu/xhtml10/xhtml-basic.rnc") == 0 ||
	preset.indexOf("http://s.validator.nu/xhtml10/xhtml-frameset.rnc") == 0 ||
	preset.indexOf("http://s.validator.nu/xhtml10/xhtml-strict.rnc") == 0 ||
	preset.indexOf("http://s.validator.nu/xhtml10/xhtml-transitional.rnc") == 0 ||
	preset.indexOf("http://s.validator.nu/html5.rnc") == 0 ||
	preset.indexOf("http://s.validator.nu/html5-its.rnc") == 0 ||
	preset.indexOf("http://s.validator.nu/html5-rdfalite.rnc") == 0)
}

function parserChanged() {
	var parser = document.getElementById("parser")
	if (parser) {
		if (isHtmlParserValue(parser.value)) {
			var select = document.getElementById("preset")
			if (select) {
				if (select.firstChild) {
					for (var n = select.firstChild; n != null; n = n.nextSibling) {
						n.disabled = !isHtmlCompatiblePreset(n.value)
					}
				}
			}
			var nsfilter = document.getElementById("nsfilter")
			if (nsfilter) {
				nsfilter.disabled = true
			}
		}
		else {
			var select = document.getElementById("preset")
			if (select) {
				if (select.firstChild) {
					for (var n = select.firstChild; n != null; n = n.nextSibling) {
						n.disabled = false
					}
				}
			}
			var nsfilter = document.getElementById("nsfilter")
			if (nsfilter) {
				nsfilter.disabled = false
			}
		}
	}
}

function formSubmission() {
	if (document.getElementsByTagName) {
		var form = document.getElementsByTagName("form")[0]
		if (form.checkValidity) {
			if (!form.checkValidity()) {
				return true
			}
		}
	}
//	disableById("submit")
	disableById("preset")
	disableByIdIfEmptyString("doc")
	disableByIdIfEmptyString("parser")
	disableByIdIfEmptyString("schema")
	disableByIdIfEmptyString("charset")
	disableByIdIfEmptyString("profile")
	disableByIdIfEmptyString("nsfilter")
	maybeMoveDocumentRowDown()
	if (textareaHidden && textarea) {
	  textareaHidden.value = textarea.value
	}
	return true
}

function undoFormSubmission() {
//	enableById("submit")
	enableById("preset")
	enableById("doc")
	enableById("parser")
	enableById("schema")
	enableById("charset")
	enableById("profile")
	enableById("nsfilter")
	maybeMoveDocumentRowUp()
	schemaChanged()
	parserChanged()
	return true
}

function maybeMoveDocumentRowDown() {
	var field = document.getElementById('doc')
	if (field && field.name == 'file') {
		var td = field.parentNode
		if (td) {
			var tr = td.parentNode
			var tbody = tr.parentNode
			tbody.appendChild(tr)
		}
	}
}

function maybeMoveDocumentRowUp() {
	var field = document.getElementById('doc')
	if (field) {
		var td = field.parentNode
		if (td) {
			var tr = td.parentNode
			if (tr && tr.previousSibling) {
				var tbody = tr.parentNode
				tbody.insertBefore(tr, tbody.firstChild)
			}
		}		
	}
}

function disableById(id) {
	var field = document.getElementById(id)
	if (field) {
		field.disabled = true
	}
}

function disableByIdIfEmptyString(id) {
	var field = document.getElementById(id)
	if (field) {
		if ("" == field.value) {
			field.disabled = true
		}
	}
}

function enableById(id) {
	var field = document.getElementById(id)
	if (field) {
		field.disabled = false
	}
}

function createHtmlElement(tagName) {
	return document.createElementNS ? document.createElementNS("http://www.w3.org/1999/xhtml", tagName) : document.createElement(tagName)
}

function installGroupingToggle() {
	var para = createHtmlElement('p')
	var button = createHtmlElement('input')
	button.type = 'button'
	button.value = 'Group Messages'
	para.appendChild(button)
	if (hasDuplicateMessages) {
		button.onclick = function() {
			if (currentOl == ungroupedOl) {
				currentOl.parentNode.replaceChild(groupedOl, currentOl)
				currentOl = groupedOl
				this.value = 'Ungroup Messages'
			}
			else {
				currentOl.parentNode.replaceChild(ungroupedOl, currentOl)
				currentOl = ungroupedOl
				this.value = 'Group Messages'
			}
		}
	}
	else {
		button.disabled = true
	}
	currentOl.parentNode.insertBefore(para, currentOl)
}

function initGrouping() {
	var n = document.documentElement.lastChild.firstChild
	while (n) {
		// The line below protects IE users from a crash
		if (n instanceof HTMLOListElement && n.className != 'source') { // deliberately IE-incompatible
			//		if (n.start) { // cross-browser compatible
			currentOl = n
			break
		}
		n = n.nextSibling
	}
	if (!currentOl) {
		return
	}
	ungroupedOl = currentOl
	groupedOl = buildGrouped(ungroupedOl)
	installGroupingToggle()
}

function buildGrouped(ol) {
	var locListByMsg = {}
	var rv = createHtmlElement('ol')
	var li = ol.firstChild
	var i = 1
	while (li) {
		var msgPara = li.firstChild
		var locExtract = createHtmlElement('li')
		locExtract.value = i
		var loc = msgPara.nextSibling
		var elaboration = null
		if (loc && loc.className && loc.className == 'location') {
			locExtract.appendChild(loc.cloneNode(true))
			var extract = loc.nextSibling
			if (extract && extract.className && extract.className == 'extract') {
				locExtract.appendChild(extract.cloneNode(true))
				elaboration = extract.nextSibling
			}
			else {
				elaboration = extract
			}
		}
		else {
			elaboration = loc
			var noLoc = createHtmlElement('p')
			noLoc.appendChild(document.createTextNode("(No location)"))
			locExtract.appendChild(noLoc)
		}
		var locList = null
		var msgText = msgPara.innerHTML
		locList = locListByMsg[msgText]
		if (locList) {
			hasDuplicateMessages = true
		}
		else {
			locList = createHtmlElement('ol')
			locListByMsg[msgText] = locList
			var msgItem = createHtmlElement('li')
			msgItem.className = li.className
			msgItem.appendChild(msgPara.cloneNode(true))
			if (elaboration) {
				msgItem.appendChild(elaboration.cloneNode(true))
			}
			msgItem.appendChild(locList)
			rv.appendChild(msgItem)
		}
		locList.appendChild(locExtract)
		
		li = li.nextSibling
		i++
	}
	
	return rv
}

function reflow(element) {
	if (element.offsetHeight) {
		var reflow = element.offsetHeight				
	}
}

function installTextarea() {
	var input = document.getElementById('doc')
	if (input && textarea) {
		var form = document.forms[0]
		if (form) {
			form.method = 'post'
			form.enctype = 'multipart/form-data'
			input.parentNode.replaceChild(textarea, input)
			reflow(textarea)
			disableById('charset')
			schemaChanged()
		}
	}
	if (textareaHidden) {
	  var submit = document.getElementById("submit")
	  if (submit) {
	    submit.parentNode.appendChild(textareaHidden)
	  }
	}
	var showSource = document.getElementById("showsource")
	if (showSource) {
		showSource.checked = true
	}
}

function installFileUpload() {
	var input = document.getElementById('doc')
	if (input && fileInput) {
		var form = document.forms[0]
		if (form) {
			form.method = 'post'
			form.enctype = 'multipart/form-data'
			input.parentNode.replaceChild(fileInput, input)
			reflow(fileInput)
			enableById('charset')
			schemaChanged()
		}
	}
	if (textareaHidden && textareaHidden.parentNode) {
	  textareaHidden.parentNode.removeChild(textareaHidden)
	}
}

function installUrlInput() {
	var input = document.getElementById('doc')
	if (input && urlInput) {
		var form = document.forms[0]
		if (form) {
			form.method = 'get'
			form.enctype = ''
			input.parentNode.replaceChild(urlInput, input)
			reflow(urlInput)
			enableById('charset')
			schemaChanged()
		}
	}
	if (textareaHidden && textareaHidden.parentNode) {
	  textareaHidden.parentNode.removeChild(textareaHidden)
	}
}

function copySourceIntoTextArea() {
	var strings = []
	var source = null
	var n = document.documentElement.lastChild.firstChild
	while (n) {
		if (n.className == 'source') {
			source = n
			break
		}
		n = n.nextSibling
	}
	if (source && textarea) {
		var li = source.firstChild
		while (li) {
			var code = li.firstChild
			if (hasTextContent) {
				strings.push(code.textContent)
			}
			else {
				strings.push(code.innerText)
			}
			li = li.nextSibling
		}
		textarea.value = strings.join('\n')
	}
}

function updateFragmentIdHilite() {
	var fragment = window.location.hash
	var selector = null
	if (linePattern.exec(fragment)) {
		selector = fragment + " *"
	} else if (exactPattern.exec(fragment)) {
		selector = fragment
	} else if (rangePattern.exec(fragment)) {
		selector = "html b." + fragment.substring(1)
	}
	var rule = ''
	if (selector) {
		rule = selector + " { background-color: #FF6666; font-weight: bold; }"
	}
	var newStyle = createHtmlElement('style')
	var ex
	try {
		newStyle.appendChild(document.createTextNode(rule))
	} catch (ex) {
		if (ex.number == -0x7FFF0001) {
			newStyle.styleSheet.cssText = rule
		} else {
			throw ex
		} 
	}
	dynamicStyle.parentNode.replaceChild(newStyle, dynamicStyle)
	dynamicStyle = newStyle
}

function emulateHashChanged() {
	var hash = window.location.hash
	if (prevHash != hash) {
		updateFragmentIdHilite()
		prevHash = hash
	}
}

if (document.getElementById) {
	window.onload = reboot
		
	if (document.addEventListener) {
		document.addEventListener("DOMContentLoaded", function() {
			window.onload = undefined
			reboot()
		}, false)
	}

	window.onunload = undoFormSubmission
	window.onabort = undoFormSubmission
	boot()
}
