Brings together comments and their replies.
当前为
// ==UserScript==
// @name FR Tree Viewer
// @namespace http://cynwoody.appspot.com/fr_tree_viewer.html
// @description Brings together comments and their replies.
// @date 2015-11-16
// @include http://*.freerepublic.com*/posts*
// @include http://freerepublic.com*/posts*
// @version 0.0.1.20151117005623
// ==/UserScript==
const STYLE = '.a2 {clear:both}' +
'.postBox {' +
'padding:3px;' +
'border:1px solid #888;' +
'margin-top:3px;' +
'margin-bottom:3px}' +
'.quoteButton {color:#009;margin-left:3px;padding:0px}' +
'.quoteBox {background:#ffc;padding:3px;border:1px solid #ccf}' +
'#progressBox {position:fixed;left:2px;top:10px;' +
'background:#fc0;padding:3px;border:1px solid black}' +
'#logBox {background:skyblue;padding:3px}' +
'#scrollBox {position:fixed;top:0px;left:0px;z-index:1;' +
'border:1px solid #888;background:yellow}' +
'#scrollButtons {padding:2px}' +
'#scrollButtons input {padding:0px;margin:0px;color:blue}' +
'#scrollClose, #scrollClose input {' +
'margin:0px;padding:0px;text-align:right;' +
'color:red;font-size:7px;font-weight:bold}';
const INDENT = 7; // Indentation per reply level, in pixels
const MAX_INDENT = 0.7; // Maximum indent, as a fraction of window width
const BACKGROUNDS = ['#ccf', '#ffc', '#cfc', '#fcc', '#cff', '#fcf', '#ccc'];
const SCROLL = {
method: "constantTime", // Change to "jump" to eliminate animation
constantSpeed: {
pixelsPerInterval: 50,
timeInterval: 10
},
constantTime: {
intervalCount: 25,
timeInterval: 20
}
};
var posts; // Maps postNumber to post (as HTML text)
var replies; // Maps postNumber to a list of replying post numbers
var postCheck; // Cross-check. Used to pick up deleted posts
var maxIndent; // Maximum indent, in pixels
var indexingCanceled; // Set when user cancels indexing of posts
var selection; // Text selected when Quote button pressed
// Keystroke watcher. Implements keyboard shortcuts:
// Ctrl-Alt-T => Tree View
// Ctrl-Alt-R => Poster Report
function onKeyPress(event)
{
if (event.ctrlKey && event.altKey) {
switch (event.charCode) {
case 116: // t in Firefox
case 20: // t in Chrome
onTreeViewClick(event, $('treeButton'));
break;
case 114: // r in Firefox
case 18: // r in Chrome
onPosterReportClick(event, $('posterReport'));
break;
}
}
}
// Handles Tree View button click (or Ctrl-Alt-T).
function onTreeViewClick(event, button)
{
button = button || this;
if (button.disabled)
return;
var callback = /Tree/.test(button.value) ? makeTreeView : makeFlatView;
disable(button, 'Waiting ...');
disable('posterReport');
indexThread(button, callback);
}
// Rearranges the posted comments into the tree view, assuming the
// thread has been indexed successfully (ok == true).
function makeTreeView(ok)
{
if (!ok) {
enable('treeButton', 'View as Tree');
enable('posterReport');
return;
}
var start = new Date();
var div = deleteExistingPosts();
maxIndent = window.innerWidth * MAX_INDENT;
postCheck = {count:0};
addReply(div, 1, 0);
if (postCheck.count < posts.length-1)
addDeletedPosts(div);
if (postCheck.count != posts.length-1)
alert('postCheck = ' + postCheck.count + ', but there are ' +
(posts.length-1) + ' posts.');
doFixups();
addScrollBox();
enable('treeButton', 'Flat View');
enable('posterReport');
logTime(start, 'generate the tree view');
}
makeTreeView.title = 'tree view';
// Makes a second pass over the posts to pick up deleted posts and
// their replies. These would otherwise be missed, because deleted
// posts have no To link.
function addDeletedPosts(container)
{
for (var x=1, limit=posts.length; x<limit; ++x) {
if (!postCheck[x])
addReply(container, x, 0);
}
}
// Adds a post to the display with the indentation indicated by
// depth. Then calls itself to add each reply at the next deeper
// indentation level.
function addReply(container, postNumber, depth)
{
++postCheck.count;
postCheck[postNumber] = true;
var div = document.createElement('div');
div.className = 'postBox';
var indent = depth * INDENT;
if (indent > maxIndent)
indent = maxIndent;
div.style.marginLeft = indent + 'px';
div.style.background = BACKGROUNDS[depth % BACKGROUNDS.length];
div.innerHTML = posts[postNumber];
var anchor = document.createElement('a');
anchor.name = postNumber;
container.appendChild(anchor);
container.appendChild(div);
var replyList = replies[postNumber];
if (replyList) {
++depth;
for (var x=0, limit=replyList.length; x<limit; ++x)
addReply(container, replyList[x], depth);
}
}
// Rearranges the posts into the chronological flat view, similar to
// FR's normal view, but always showing all the posts.
function makeFlatView(ok)
{
if (!ok) {
enable('treeButton', 'View as Tree');
enable('posterReport');
return;
}
var start = new Date();
var div = deleteExistingPosts();
var s = '';
for (var postNumber=1, limit=posts.length; postNumber<limit; ++postNumber) {
s += '<a name=' + postNumber + '></a>\n';
s += posts[postNumber];
s += '<hr size=1 noshade=noshade>\n';
}
div.innerHTML = s;
removeScrollBox();
doFixups();
enable('treeButton', 'Tree View');
enable('posterReport');
logTime(start, 'generate the flat view');
}
makeTreeView.title = 'flat view';
// Performs fixups needed after view creation (tree or flat).
function doFixups()
{
fixLinks(document.body);
removeBlankLines(document.body);
addQuoteButtons(document.body);
localizeDates(document.body);
decrudify();
}
// Rewrites all the To-links in the node in such a was as to ensure
// they are valid in the new, single-page environment.
function fixLinks(node)
{
var links = $x('.//a[contains(., "To ")]', node);
for (var x=0, limit=links.snapshotLength; x<limit; ++x) {
var link = links.snapshotItem(x);
link.href = link.hash;
}
}
// Removes the existing posts and replaces them with an empty div
// ready to receive the rearranged posts. Returns the empty div.
function deleteExistingPosts()
{
var firstNode = findBeginningOfPosts();
var lastNode = document.body.lastChild;
do {
lastNode = lastNode.previousSibling;
} while (!/Disclaimer/.test(lastNode.innerHTML));
var range = document.createRange();
range.setStartAfter(firstNode);
range.setEndBefore(lastNode);
range.deleteContents();
range.detach();
var div = document.createElement('div');
div.id = 'posts';
document.body.insertBefore(div, lastNode);
return div;
}
// Locates the node before the first post. If the user is signed in,
// we can use the 'comment' anchor. Otherwise, we have to find the
// actual first post and back up to the horizontal rule.
function findBeginningOfPosts()
{
var firstNode = document.anchors.namedItem('comment');
if (firstNode)
return firstNode;
var node = $xFirst('div[@class="b2"]');
node = node || $xFirst('div[@id="posts"]');
while (node) {
node = node.previousSibling;
if (node.tagName == 'HR')
return node;
}
alert("Can't find posts!");
return null;
}
// Parses all the posts in the thread and builds two tables (unless
// they already exist):
// - posts, an array that maps a postNumber to the post's HTML
// snippet.
// - replies, a hash that links a postNumber to an array of
// replying postNumbers.
// Calls the callback function when the indexing is complete (it will
// happen asynchronously if page fetches are required).
function indexThread(button, callback)
{
if (replies)
callback(true);
else {
var first = $xFirst('a[@class="fr_page_goto"][contains(., "first")]');
if (first) {
button.value = 'Waiting ...';
indexWholeThread(first, callback);
}
else {
var start = new Date();
indexPosts(originalHTML);
indexReplies();
var now = new Date();
logTime(start, 'index the thread');
callback(true);
}
}
}
// Called by indexThread to index multipage threads. Fetches the entire
// thread in the background, adding the posts of each page to the posts
// index. Then indexes the replies and calls the callback function,
// indicating whether the operation completed or was canceled by the
// user.
function indexWholeThread(firstLink, callback)
{
var start = new Date();
var link = document.createElement('a');
link.href = firstLink.href;
link.hash = '';
loadLink(link, loadNext);
function loadNext(html)
{
if (indexingCanceled) {
indexingCanceled = posts = replies = null;
hideProgress();
log('Loading and indexing canceled!');
callback(false);
return;
}
if (!html) {
callback(false);
return;
}
var r = html.match(/href="posts(\?[^"]*)" class="fr_page_goto"[^>]*>next</);
if (r) {
link.search = r[1];
loadLink(link, loadNext);
}
else {
showProgress('Generating ' + callback.title + ' ...');
var postCount = posts.length - 1;
indexReplies();
var now = new Date();
logTime(start, 'load and index');
callback(true);
hideProgress();
}
}
}
// Displays a message in floating box to let the user know how far a
// multipage indexing operation has proceeded. The box includes a Cancel
// button, in case the user decides to bail.
function showProgress(msg)
{
var progress = $('progressMsg');
if (!progress)
progress = makeProgressBox();
progress.innerHTML = msg;
$('indexingCancel').disabled = false;
$('progressBox').style.display = 'block';
}
function makeProgressBox()
{
var div = document.createElement('div');
div.id = 'progressBox';
div.innerHTML = '<span id=progressMsg></span> ' +
'<input id=indexingCancel type=button value=Cancel>';
document.body.appendChild(div);
$('indexingCancel').addEventListener('click', onProgressCancel, false);
return $('progressMsg');
}
function hideProgress()
{
var box = $('progressBox');
if (box)
box.style.display = 'none';
}
// Handles a progress box cancel click. Signals the indexing to stop.
function onProgressCancel()
{
indexingCanceled = true;
$('indexingCancel').disabled = true;
}
// Fetches a page in the background, indexes it, and calls the callback,
// passing the retrieved HTML.
function loadLink(link, callback)
{
var req = new XMLHttpRequest();
req.open('GET', link, true);
req.onreadystatechange = handler;
req.send(null);
showProgress('Loading ' + link);
function handler()
{
if (req.readyState == 4) {
var html = req.responseText;
if (req.status != 200) {
var msg = "XHR received " + req.status + ' ' + req.statusText +
' loading ' + link + '.';
alert(msg);
log(msg);
html = null;
indexingCanceled = true;
}
if (html)
indexPosts(html);
callback(html);
}
}
}
// Extracts the posts from a page of HTML text and adds them to the
// posts array, using postNumber as the subscript.
function indexPosts(html)
{
var r = new RegExp('<a name="(\\d+)"></a>\\n([\\s\\S]+?' +
'(?:<div class="n2">[\\s\\S]+?</div>|' +
'Moderator</i></small><br[ /]*>))', 'gi');
posts = posts || [];
var match;
while (match = r.exec(html))
posts[match[1]] = match[2];
}
// Runs thru the posts array and builds the replies table. The replies
// table contains an array of replying post numbers for each post that
// has at least one reply.
function indexReplies()
{
replies = {};
for (var postNumber=1, limit=posts.length; postNumber<limit; ++postNumber) {
var m = /<a .*?href=".*?#(\d+)">To \1</i.exec(posts[postNumber]);;
if (m && m[1]) {
var toNumber = m[1];
var replyList = replies[toNumber];
if (replyList)
replyList.push(postNumber);
else
replies[toNumber] = [postNumber];
}
}
}
// Adds a draggable floating box which appears when the user clicks in
// in the white indentation space of the tree view. The box includes
// buttons to scroll up or down to the next post at or above the box's
// indent level.
function addScrollBox()
{
var div = document.createElement('div');
div.id = 'scrollBox';
div.style.display = 'none';
div.innerHTML = '<div id=scrollClose>' +
'<input id=scrollCloseButton type=button value=x></div>' +
'<div id=scrollButtons>' +
'<input id=up type=button value=Up><br>' +
'<input id=dn type=button value=Dn>' +
'</div>';
div.title = 'Scrolls up or down to next comment of same or outer color. ' +
'Drag to change color.';
document.body.appendChild(div);
$('posts').addEventListener('click', onPostsClick, false);
$('scrollCloseButton').addEventListener('click', onScrollClose, false);
var list = $x('.//input', div);
for (var x=0, limit=list.snapshotLength; x<limit; ++x) {
var button = list.snapshotItem(x);
button.addEventListener('mousedown', onScrollButtonMouseDown, false);
}
div.addEventListener('mousedown', onScrollBoxMouseDown, false);
$('dn').addEventListener('click', onDnClick, false);
$('up').addEventListener('click', onUpClick, false);
}
// Deletes the scroll box created by addScrollBox, if it exists.
function removeScrollBox()
{
var scrollBox = $('scrollBox');
if (scrollBox) {
var posts = scrollBox.parentNode;
posts.removeChild(scrollBox);
posts.removeEventListener('click', onPostsClick, false);
}
}
// Responds to a click in the tree view indentation white space by
// showing the scroll box at the spot clicked.
function onPostsClick(e)
{
if (e.target.id != 'posts')
return;
var scrollBox = $('scrollBox');
scrollBox.style.display = 'block';
scrollBox.style.left = (e.clientX - scrollBox.offsetWidth/2) + 'px';
scrollBox.style.top = e.clientY + 'px';
colorScrollBox(scrollBox);
}
// Hides the scroll box when the user clicks its Close button.
function onScrollClose(e)
{
$('scrollBox').style.display = 'none';
}
// Traps mousedowns on scroll box buttons, so they won't start a drag.
function onScrollButtonMouseDown(e)
{
e.stopPropagation();
}
// Supports dragging the scroll box by its white space areas.
function onScrollBoxMouseDown(e)
{
this.addEventListener('mousemove', onMouseMove, true);
this.addEventListener('mouseup', onMouseUp, true);
var mdx = e.clientX;
var mdy = e.clientY;
var mdLeft = parseInt(this.style.left);
var mdTop = parseInt(this.style.top);
e.stopPropagation();
function onMouseMove(e)
{
var x = e.clientX - mdx;
var y = e.clientY - mdy;
this.style.left = mdLeft + x + 'px';
this.style.top = mdTop + y + 'px';
colorScrollBox(this);
e.stopPropagation();
}
function onMouseUp(e)
{
this.removeEventListener('mousemove', onMouseMove, true);
this.removeEventListener('mouseup', onMouseUp, true);
e.stopPropagation();
}
}
// Sets the scroll box's background color to correspond to its current
// indent level.
function colorScrollBox(scrollBox)
{
var depth = scrollBoxDepth(scrollBox);
scrollBox.style.background = BACKGROUNDS[depth % BACKGROUNDS.length];
}
// Computes the scroll box's indent level, based on its horizontal
// position.
function scrollBoxDepth(scrollBox)
{
var offset = scrollBox.offsetLeft - $('posts').offsetLeft +
Math.floor(scrollBox.offsetWidth/2);
return offset > 0 ? Math.floor(offset/INDENT) : 0;
}
// Scrolls up to the next post at or left of the scroll box's indent
// level.
function onUpClick(event)
{
scrollPosts(event, findUp);
function findUp(boxDepth, boxTop, divs)
{
for (var x=divs.snapshotLength-1; x>=0; --x) {
var div = divs.snapshotItem(x);
if (div.offsetTop >= boxTop)
continue;
var divDepth = parseInt(div.style.marginLeft) / INDENT;
if (divDepth <= boxDepth)
break;
}
return div;
}
}
// Scrolls down to the next post at or left of the scroll box's indent
// level.
function onDnClick(event)
{
scrollPosts(event, findDown);
function findDown(boxDepth, boxTop, divs)
{
for (var x=0, limit=divs.snapshotLength; x<limit; ++x) {
var div = divs.snapshotItem(x);
if (div.offsetTop <= boxTop)
continue;
var divDepth = parseInt(div.style.marginLeft) / INDENT;
if (divDepth <= boxDepth)
break;
}
return div;
}
}
// Scrolls the display so that the post found by the findDiv function
// is opposite the scroll box. Chooses between three different scroll
// methods, depending on the settings in the SCROLL constant. Available
// methods include two types of animation and a simple jump. If the
// control or shift key is down, it always uses the jump method.
function scrollPosts(event, findDiv)
{
var box = $('scrollBox');
var boxTop = box.offsetTop + window.pageYOffset;
var boxDepth = scrollBoxDepth(box);
var divs = $x('div', $('posts'));
var div = findDiv(boxDepth, boxTop, divs);
var scrollDistance = div.offsetTop - boxTop;
if (/jump/i.test(SCROLL.method) || event.ctrlKey || event.shiftKey)
jump();
else if (/time/i.test(SCROLL.method))
constantTime();
else if (/speed/i.test(SCROLL.method))
constantSpeed();
else
constantTime();
// Non-animated, simple scroll.
function jump()
{
window.scrollBy(0, scrollDistance);
}
var interval;
// Animated scroll: Moves the display faster or slower depending
// on the distance to scroll.
function constantTime()
{
var parms = SCROLL.constantTime;
var intervalCount = parms.intervalCount;
interval = window.setInterval(scrollABit, parms.timeInterval);
document.body.addEventListener('click', abort, true);
function scrollABit()
{
if (intervalCount == 0) {
abort();
return;
}
var scrollInc = Math.round(scrollDistance / intervalCount--);
window.scrollBy(0, scrollInc);
scrollDistance -= scrollInc;
}
}
// Animated scroll: Moves the display at a steady speed until the
// distance is covered.
function constantSpeed()
{
var parms = SCROLL.constantSpeed;
var scrollInc = parms.pixelsPerInterval;
if (scrollDistance < 0)
scrollInc = -scrollInc;
interval = window.setInterval(scrollABit, parms.timeInterval);
document.body.addEventListener('click', abort, true);
function scrollABit()
{
if (scrollDistance == 0) {
abort();
return;
}
if (Math.abs(scrollInc) > Math.abs(scrollDistance))
scrollInc = scrollDistance;
window.scrollBy(0, scrollInc);
scrollDistance -= scrollInc;
}
}
// Terminates an animated scroll early if the user clicks.
function abort()
{
window.clearInterval(interval);
document.body.removeEventListener('click', arguments.callee, true);
}
}
// -----------------------------------------------------------------------------
// Handles a mouse press on a Quote button. Installs a click handler for
// the button, allowing the click to be handled correctly while preserving
// any text selection the user may have made.
function onQuotePress()
{
this.removeEventListener('click', onQuoteClick, false);
this.addEventListener('click', onQuoteClick, false);
var sel = window.getSelection();
selection = sel.toString();
sel.removeAllRanges(); // Deselect the text
}
// Handles a Quote / Unquote button click. If there is already a quoted
// post showing (the Unquote button case), we delete it. Otherwise (the
// Quote button case), we locate the post to be quoted and display it
// in a box above the current post (the one containing the Quote button).
// Unless a post number has been selected with the mouse, we quote the
// the post to which the current post is in reply.
// If the desired post is not in memory, we will load the page that
// contains it in the background, while showing the progress bar.
function onQuoteClick()
{
var button = this;
if (selection) {
var postNumbers = selection.match(/\d+/g);
if (postNumbers) {
hideQuote(button);
quoteSelectedPostNumbers(button, postNumbers);
return;
}
}
if (button.value == 'Unquote') {
hideQuote(button);
return;
}
var postNumber = button.previousSibling.hash.substr(1);
findAndQuotePost(button, postNumber);
}
// Finds and quotes each of a list of posts
function quoteSelectedPostNumbers(button, postNumbers)
{
for (var x=0; x<postNumbers.length; ++x)
findAndQuotePost(button, postNumbers[x]);
}
// Finds and quotes a given post. Runs right away if the desired post
// is in memory. Otherwise, it loads the page containing the post in
// the background before continuing.
function findAndQuotePost(button, postNumber)
{
if (findPost(postNumber))
quotePost(button, postNumber);
else {
disable(button, 'Waiting ...');
var l = window.location;
var url = l.protocol + '//' + l.hostname + l.pathname +
'?page=' + postNumber + '#' + postNumber;
loadLink(url, function() {
quotePost(button, postNumber);
});
button.disabled = false;
}
}
// Looks for the post in the posts index. If there is no posts index,
// we build one for the current page. Returns undefined if not found.
function findPost(postNumber)
{
hideProgress();
if (!posts)
indexPosts(originalHTML);
return posts[postNumber];
}
// Copies the post to be quoted into a box above the post containing
// the Quote button.
function quotePost(button, postNumber)
{
var post = findPost(postNumber);
post = post || '<b>Unable to retrieve post #' + postNumber + '.</b>';
var div = button.ownerDocument.createElement('div');
div.className = 'quoteBox';
div.innerHTML = post;
addQuoteButtons(div);
removeBlankLines(div);
fixToLink(div);
localizeDates(div);
var anchorDiv = findAnchorDiv(button);
if (anchorDiv.className != 'postBox')
anchorDiv.parentNode.insertBefore(div, anchorDiv);
else
anchorDiv.insertBefore(div, anchorDiv.firstChild);
button.value = 'Unquote';
window.scrollBy(0, div.offsetHeight);
}
// Ensures that a quoted post's To link will work in its possibly
// new context.
function fixToLink(div)
{
var link = $xFirst('div[@class="n2"]/a[contains(., "To ")]', div);
if (link) {
var postNumber = link.hash.substr(1);
if (document.anchors.namedItem(postNumber))
return;
link.href = 'posts?page=' + postNumber + '#' + postNumber;
}
}
// Figures out where to put the quote box.
function findAnchorDiv(node)
{
var p = node.parentNode;
while (p.parentNode.tagName != 'BODY' && p.parentNode.id != 'posts')
p = p.parentNode;
do {
p = p.previousSibling;
} while (p && p.tagName != 'A');
do {
p = p.nextSibling;
} while (p && p.tagName != 'DIV');
return p;
}
// Hides a quoted post and scrolls the window to avoid disorienting
// the user.
function hideQuote(button)
{
if (button.value != 'Unquote')
return;
var maxScroll = window.scrollMaxY - window.scrollY;
var totalHeight = 0;
button.value = 'Quote';
var quotedPost = button;
var gp = quotedPost.parentNode.parentNode;
if (gp.tagName != 'DIV' || gp.className != 'quoteBox')
quotedPost = quotedPost.parentNode;
else
quotedPost = gp;
do {
quotedPost = quotedPost.previousSibling;
} while (quotedPost && quotedPost.className != 'quoteBox');
do {
totalHeight += quotedPost.offsetHeight;
var sibling = quotedPost.previousSibling;
quotedPost.parentNode.removeChild(quotedPost);
quotedPost = sibling;
} while (quotedPost && quotedPost.tagName == 'DIV');
window.scrollBy(0, -(totalHeight<maxScroll ? totalHeight : maxScroll));
}
// Locates the quote button in a quote box.
function findQuoteButton(quoteDiv)
{
return $xFirst('div[@class="n2"]/input[@class="quoteButton"]', quoteDiv);
}
// -----------------------------------------------------------------------------
// Constructs an object to keep track of the data about a poster in
// the thread (for the Poster Report).
function Poster(key, name, age, serial)
{
this.key = key; // To construct home page link
this.name = name; // Display name
this.sortKey = name.toLowerCase();
this.age = age >= 0 ? age : 0; // How long on FR?
this.serial = serial; // Order of first appearance on thread
this.postCount = 0;
this.replyCount = 0;
}
Poster.makeHeader = function(s)
{
s += '<tr>';
s += '<th class=numh>Rank</th>';
s += '<th>Poster</th>';
s += '<th class=numh>FR<br>Age</th>';
s += '<th class=numh>Posts</th>';
s += '<th class=numh>Replies</th>';
s += '<th class=numh>Replies<br>per Post</th>';
s += '</tr>\n';
return s;
}
Poster.prototype.calcReplyRatio = function()
{
this.replyRatio = this.replyCount / this.postCount;
return this.replyRatio;
}
// Generates the HTML for a row of the Poster Report.
Poster.prototype.makeRow = function(s, n)
{
s += '<tr><td class=num>' + n + '</td>';
s += '<td><a href="http://www.freerepublic.com/~' + this.key + '/"' +
' target="_blank">';
if (this.isOriginalPoster)
s += '<b>';
s += this.name;
if (this.isOriginalPoster)
s += '</b>';
s += '</a></td>'
s += '<td class=num>' + formatAge(this.age) + '</td>';
s += '<td class=num>' + this.postCount + '</td>';
s += '<td class=num>' + this.replyCount + '</td>';
s += '<td class=num>' + (this.calcReplyRatio()).toFixed(1) + '</td>';
s += '</tr>\n'
return s;
}
function formatAge(age)
{
age /= 86400000;
if (age > 360)
return (age/365.25).toFixed(1) + 'y';
if (age > 60)
return (age/30).toFixed(1) + 'm';
if (age > 21)
return (age/7).toFixed(1) + 'w';
return age.toFixed() + 'd';
}
var posters; // Table of Poster objects, accessed by name
var posterList; // Sortable array (contents of posters)
var posterWindow; // Window into which to write poster report
var removedPostCount; // Count of admin-removed posts
// Handles a click on the Poster Report button (or Ctrl-Alt-R).
function onPosterReportClick(event, button)
{
button = button || this;
disable(button, 'Waiting ...');
disable('treeButton');
openPosterWindow();
window.setTimeout(function() {indexThread(button, makePosterReport)}, 0);
}
// Opens the poster report window. Must run in response to the user
// click, not the multipage load completion, or else the popup will
// be blocked (unless the user has added FR to the exception list).
function openPosterWindow()
{
if (!posterWindow || posterWindow.closed)
posterWindow = window.open('about:blank', 'posterReport');
if (posterWindow) {
posterWindow.blur();
window.focus();
}
}
// Builds the table of posters. Runs thru the posts index and the
// replies and accumulates stats about each poster in his or her
// Poster object.
function makePosterReport(ok)
{
if (!ok) {
enableAfterPosterReport();
return;
}
var startDate = new Date();
var now = new Date().getTime();
posters = {};
removedPostCount = 0;
var regexp = new RegExp('<a href="/(?:%7E|~)([^/]*)/" title="' +
'Since (\\d\\d\\d\\d-\\d\\d-\\d\\d)">([^<]*)</a>', 'i');
var list = [];
for (var postNumber in posts)
list.push(postNumber);
list.sort(function(a, b) {return a-b;});
for (var x=0, limit=list.length; x<limit; ++x) {
var postNumber = list[x];
var r = regexp.exec(posts[postNumber]);
if (!r) {
++removedPostCount;
continue;
}
var name = r[3];
var poster = posters[name];
if (!poster) {
var date = Date.parse(r[2].replace(/-/g, '/') + ' GMT');
poster = new Poster(r[1], name, now - date, x);
posters[name] = poster;
poster.isOriginalPoster = postNumber == 1;
}
++poster.postCount;
var replyList = replies[postNumber];
if (replyList)
poster.replyCount += replyList.length;
}
sortPostersBy('serial', false);
try {
showPosters();
}
catch(e) {
alert("Error: " + e);
}
logTime(startDate, 'show the poster report on ' +
posterList.length + ' posters');
enableAfterPosterReport();
}
function enableAfterPosterReport()
{
enable('posterReport', 'Poster Report');
enable('treeButton');
}
makePosterReport.title = 'poster report';
// Displays the Poster Report in a popup window.
function showPosters()
{
if (!posterWindow)
return;
var s = '<html><head><title>Poster Report</title>\n' +
'<style>' +
'table {border-collapse:collapse;' +
'border:1px solid #00f;}' +
'td, th {border:1px inset #ccf;padding-left:3px;padding-right:3px}' +
'th {cursor:pointer;background:#ffc;vertical-align:bottom}' +
'h2 {color:darkred}' +
'.numh {text-align:right}' +
'.num {text-align:right;font:bold smaller monospace}\n' +
'</style>\n' +
'</head><body>\n' +
'<h2>' + document.title + '</h2>\n' +
'<h3>Poster Report</h3>\n';
s += '<table>\n';
s = Poster.makeHeader(s);
var n = 0;
var postCount = 0;
for (var x=0, limit=posterList.length; x<limit; ++x) {
var poster = posterList[x];
s = poster.makeRow(s, ++n);
postCount += poster.postCount;
}
s += '</table>\n';
s += '<br>' + postCount + ' total posts, by ' + posterList.length +
' distinct posters. ' + (postCount/posterList.length).toFixed(1) +
' average posts per poster.\n';
if (removedPostCount) {
s += '<br>' + removedPostCount + ' post' +
(removedPostCount == 1 ? ' was' : 's were') + ' removed.';
}
s += '<br>Average poster seniority: ' + formatAge(averageAge()) + '.';
var div = posterWindow.document.createElement('div');
div.innerHTML = s;
var b = posterWindow.document.body;
var oldDiv = b.firstChild;
b.appendChild(div);
if (oldDiv)
b.removeChild(oldDiv);
var xp = $x('.//th', posterWindow.document.body);
for (var x=0, limit=xp.snapshotLength; x<limit; ++x)
xp.snapshotItem(x).addEventListener('click', onHeaderClick, false);
posterWindow.focus();
}
function averageAge()
{
var total = 0;
for (var x=0, limit=posterList.length; x<limit; ++x)
total += posterList[x].age;
return total / limit;
}
// Receives control when the user clicks on a table header in the Poster
// Report. Sorts the table by the selected column (or simply reverses it
// if it's already sorted by that column). Then redisplays the report.
function onHeaderClick()
{
var text = this.innerHTML;
var parm = ['serial', false];
if (/Poster/.test(text))
parm = ['sortKey', false];
else if (/Age/.test(text))
parm = ['age', true];
else if (/Posts/.test(text))
parm = ['postCount', true];
else if (/Replies$/.test(text))
parm = ['replyCount', true];
else if (/per Post/.test(text))
parm = ['replyRatio', true];
if (parm[0] == posterList.property)
posterList.reverse();
else
sortPostersBy(parm[0], parm[1]);
showPosters();
}
// Sorts the posters by the indicated Poster object property, in
// ascending or descending order.
function sortPostersBy(property, backwards)
{
posterList = [];
posterList.property = property;
for (name in posters)
posterList.push(posters[name]);
posterList.sort(comparator);
function comparator(a, b) {
var r;
if (a[property] > b[property])
r = 1;
else if (a[property] < b[property])
r = -1;
else if (a.sortkey > b.sortKey)
return 1;
else if (a.sortKey < b.sortKey)
return -1;
else
return 0;
if (backwards)
r = -r;
return r;
}
}
// -----------------------------------------------------------------------------
function $(id) {return document.getElementById(id);}
function $x(xpath, contextNode, resultType)
{
contextNode = contextNode || document.body;
resultType = resultType || XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE;
var doc = contextNode.ownerDocument; // FF3; can't just use document
return doc.evaluate(xpath, contextNode, null, resultType, null);
}
function $xFirst(xpath, contextNode)
{
var xpr = $x(xpath, contextNode, XPathResult.FIRST_ORDERED_NODE_TYPE);
return xpr.singleNodeValue;
}
// Disables a button and sets its text to the supplied string.
function disable(button, msg)
{
if (typeof button == 'string')
button = $(button);
if (msg)
button.value = msg;
button.disabled = true;
}
// Enables a button and sets its text to the supplied string.
function enable(button, msg)
{
if (typeof button == 'string')
button = $(button);
if (msg)
button.value = msg;
button.disabled = false;
}
// Adds the style rules defined in the STYLE constant to the page.
function addStyles()
{
var style = document.createElement('style');
style.innerHTML = STYLE;
document.getElementsByTagName('head')[0].appendChild(style);
}
// Makes the link to the article to be discussed go directly to the
// article without pausing and redirecting.
function fixArticleRedirect()
{
var link = $xFirst('.//a[starts-with(@href, "/^")]');
if (link)
link.href = link.href.replace(/^.*?\%5E/, '');
}
// Removes those extra blank lines that seem to crop up at the end
// of certain posts.
function removeBlankLines(doc)
{
var list = $x('.//br[@clear="all"]', doc);
for (var x=0, limit=list.snapshotLength; x<limit; ++x) {
var br = list.snapshotItem(x);
br.parentNode.removeChild(br);
}
}
// Converts posting date stamps from Pacific to local time.
function localizeDates(doc)
{
var list = $x('.//span[@class="date"]', doc);
for (var x=0, limit=list.snapshotLength; x<limit; ++x) {
var date = list.snapshotItem(x);
date.innerHTML = new Date(date.innerHTML).toLocaleString();
}
}
// Adds a Quote button next to the To link in each post having one.
function addQuoteButtons(doc)
{
var quoteButtonModel = document.createElement('input');
quoteButtonModel.className = 'quoteButton';
quoteButtonModel.type = 'button';
quoteButtonModel.value = 'Quote';
var xp = $x('.//div[@class="n2"]/a[contains(., "To ")]', doc);
for (var x=0, limit=xp.snapshotLength; x<limit; ++x) {
var link = xp.snapshotItem(x);
if (/^To \d+$/.test(link.innerHTML)) {
var quoteButton = quoteButtonModel.cloneNode(true);
quoteButton.addEventListener('mousedown', onQuotePress, false);
link.parentNode.insertBefore(quoteButton, link.nextSibling);
}
}
}
// Adds the Tree View and Poster Report buttons at the top of the page,
// next to the 'comments' link.
function addButtons()
{
var node = $xFirst('//a[contains(@href, "#comment")]');
node.innerHTML += ' <input type=button value="View as Tree" ' +
'id=treeButton title="Ctrl-Alt-T">';
var span = document.createElement('span');
span.innerHTML = ' <input type=button value="Poster Report" ' +
'id=posterReport title="Ctrl-Alt-R">';
node.parentNode.appendChild(span);
$('treeButton').addEventListener('click', onTreeViewClick, false);
$('posterReport').addEventListener('click', onPosterReportClick, false);
}
// Installs a keystroke event handler to catch the keyboard shortcuts
// for the Tree View and the Poster Report.
function addKeys()
{
window.addEventListener('keypress', onKeyPress, false);
}
// Adds a blue box at the end of the page, in which to write debugging
// messages.
function addLogBox()
{
var div = document.createElement('div');
div.id = 'logBox';
document.body.appendChild(div);
}
// Writes a log message into the log box at the bottom of the page.
function log(msg)
{
var logBox = $('logBox');
var html = logBox.innerHTML;
if (html)
html += '<br>\n';
logBox.innerHTML = html + msg;
}
// Logs the time it took to perform a given task.
function logTime(startTime, task)
{
var time = new Date() - startTime;
var s = 'It took ' + time + ' ms to ' + task;
if (posts) {
var n = posts.length - 1;
s += ' for ' + n + ' posts; ' + (time/n).toFixed(2) +
' ms/post';
}
log(s + '.');
}
// Scrolls the window to the internal anchor indicated by the 'hash'.
function fixLocation()
{
location.hash = location.hash;
}
// ------ Decrudify ------------------------------------------------------------
// Decrudify fixes garbage characters introduced into posts by a recent
// FR server bug in which the server breaks up the individual bytes
// of posted UTF-8 sequences into their own separate HTML entities,
// resulting in garbage characters on the screen.
// E.g., a left curly double-quote is unicode \u201c, which takes three
// bytes to represent in UTF-8: e2 80 9c. Instead of passing the UTF-8
// unscathed, the server substitutes the entities for small-a with a
// circumflex (e2), the euro-symbol (80), and the oe ligature (9c),
// resulting in gibberish on the screen. Decrudify finds such garbage
// sequences and substitutes the originally intended character.
// A hash containing an entry for each entity value that converts to a
// character in the range \u0080 thru \u00ff.
var charCodeToByte = {
8364: 128,
129: 129,
8218: 130,
402: 131,
8222: 132,
8230: 133,
8224: 134,
8225: 135,
710: 136,
8240: 137,
352: 138,
8249: 139,
338: 140,
141: 141,
381: 142,
143: 143,
144: 144,
8216: 145,
8217: 146,
8220: 147,
8221: 148,
8226: 149,
8211: 150,
8212: 151,
732: 152,
8482: 153,
353: 154,
8250: 155,
339: 156,
157: 157,
382: 158,
376: 159,
160: 160,
161: 161,
162: 162,
163: 163,
164: 164,
165: 165,
166: 166,
167: 167,
168: 168,
169: 169,
170: 170,
171: 171,
172: 172,
173: 173,
174: 174,
175: 175,
176: 176,
177: 177,
178: 178,
179: 179,
180: 180,
181: 181,
182: 182,
183: 183,
184: 184,
185: 185,
186: 186,
187: 187,
188: 188,
189: 189,
190: 190,
191: 191,
192: 192,
193: 193,
194: 194,
195: 195,
196: 196,
197: 197,
198: 198,
199: 199,
200: 200,
201: 201,
202: 202,
203: 203,
204: 204,
205: 205,
206: 206,
207: 207,
208: 208,
209: 209,
210: 210,
211: 211,
212: 212,
213: 213,
214: 214,
215: 215,
216: 216,
217: 217,
218: 218,
219: 219,
220: 220,
221: 221,
222: 222,
223: 223,
224: 224,
225: 225,
226: 226,
227: 227,
228: 228,
229: 229,
230: 230,
231: 231,
232: 232,
233: 233,
234: 234,
235: 235,
236: 236,
237: 237,
238: 238,
239: 239,
240: 240,
241: 241,
242: 242,
243: 243,
244: 244,
245: 245,
246: 246,
247: 247,
248: 248,
249: 249,
250: 250,
251: 251,
252: 252,
253: 253,
254: 254,
255: 255,
};
// Makes a regular expression that matches UTF-8 sequences
function makeUtf8Regex(table) {
table = table || charCodeToByte;
var keys = Object.getOwnPropertyNames(table).sort();
var begRange = keys[0]*1;
var prevKey = begRange;
var regExp = '[' + toUnicodeLit(192) + '-' + toUnicodeLit(247) + '][';
for (var x=1; x<keys.length; x++) {
var c = keys[x]*1;
if (c >= 192 && c <= 247)
continue;
if (c == prevKey + 1) {
prevKey++;
continue;
}
addToRegExp();
begRange = c;
prevKey = begRange;
}
addToRegExp();
regExp += ']+';
return new RegExp(regExp, 'g');
function addToRegExp() {
regExp += toUnicodeLit(begRange);
if (begRange < prevKey)
regExp += '-' + toUnicodeLit(prevKey);
}
}
// Converts a numeric character code to a unicode hex literal (\uxxxx)
function toUnicodeLit(charCode) {
var hex = ('000' + charCode.toString(16)).slice(-4);
return '\\u' + hex;
}
var regExp = makeUtf8Regex(charCodeToByte);
// Returns the input string with any UTF-8 sequences converted to JavaScript
// code points
function utf8ToString(utf8) {
fixCount++;
var p = 0;
var result = '';
while (p < utf8.length) {
var c = utf8.charCodeAt(p++);
switch (c >> 4) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
result += String.fromCharCode(c);
break;
case 8:
case 9:
case 10:
case 11:
console.log("Bad UTF-8 string: " + utf8.slice(p-16, p+16) +
' p = ' + p);
break;
case 12:
case 13:
result += String.fromCharCode((c & 31) << 6 |
charCodeAt(utf8, p++));
break;
case 14:
result += String.fromCharCode((c & 15) << 12 |
charCodeAt(utf8, p++) << 6 |
charCodeAt(utf8, p++));
break;
case 15:
result += String.fromCodePoint((c & 7) << 18 |
charCodeAt(utf8, p++) << 12 |
charCodeAt(utf8, p++) << 6 |
charCodeAt(utf8, p++));
break;
default:
console.log("Bad charCode " + c + ' at p = ' + p + ' in ' +
utf8);
}
}
return result;
}
// Returns the byte value for the charCode at position x in the UTF-8 string.
// E.g., charCode 8364 (the euro-sign) converts to 128
function charCodeAt(utf8, x) {
var c = charCodeToByte[utf8.charCodeAt(x)];
if ((c >> 6) != 2)
console.log("Bad UTF8 char " + c + " at " + x + " in " + utf8);
return c & 63;
}
var fixCount;
// Walks all the text nodes in the document and decrudifies each one
function decrudify() {
var t = performance.now();
fixCount = 0;
var nodeWalker = document.createTreeWalker(document.body,
NodeFilter.SHOW_TEXT);
while (nodeWalker.nextNode())
decrudifyTextNode(nodeWalker.currentNode);
t = performance.now() - t;
var msg = "Decrudify made " + fixCount + " fix" +
(fixCount == 1 ? '' : 'es') +
' in ' + t.toFixed(1) + "ms.";
log(msg);
console.log(msg);
}
// Runs utf8ToString on any UTF-8 sequences in a text node until no change
// results. Replaces the text node if any change occurred
function decrudifyTextNode(node) {
var text = node.textContent;
var originalText = text;
while (true) {
var newText = text.replace(regExp, utf8ToString);
if (newText == text)
break;
text = newText;
}
if (newText != originalText)
node.textContent = newText;
}
// -----------------------------------------------------------------------------
// Main program ...
var startTime = new Date();
var originalHTML = document.body.innerHTML;
addStyles();
addLogBox();
fixArticleRedirect();
removeBlankLines(document.body);
addQuoteButtons(document.body);
addButtons();
addKeys();
decrudify();
logTime(startTime, 'prepare the page');
// Try to correct positioning error when going to internal anchors.
if (location.hash) {
fixLocation();
document.body.addEventListener('load', fixLocation, false);
window.setTimeout(fixLocation, 500);
}