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// <source lang="javascript">
/*
Preview button for file uploads. Adapted from http://commons.wikimedia.org/wiki/MediaWiki:UploadForm.js by Lupo, March 2008.
Adaptation by http://rationalwiki.org/wiki/User:Nx
Source: http://rationalwiki.org/wiki/MediaWiki:UploadPreview.js
License: GFDL
*/
var wpPreviewUploadLbl = "Show preview";
var wpPreviewUploadTooltip = "Preview your changes, please use this before saving!";
var wpPreviewOverwriteError ='You will upload over an already existing file.'
+'If you proceed, the information in this form will not appear on the description page.';
var wpCategoriesUploadLbl = "Categories:";
if (typeof (UploadForm) == 'undefined') {
var UploadForm = {
isInstalled : false,
isReupload : false,
the_form : null,
install : function() {
if (UploadForm.isInstalled) return; // Do this only once per page!
UploadForm.isInstalled = true;
if (document.URL.indexOf ('uploadpreview=disabled') >= 0) return; // We're disabled
//Only on Special:Upload
if (wgCanonicalNamespace != 'Special' || wgCanonicalSpecialPageName != 'Upload') return;
var form = document.getElementById ('upload')
|| document.getElementById ('mw-upload-form');
var original_desc = document.getElementById ('wpgames');
if (!form || !original_desc) return; // Oops. Not good: bail out; don't do anything.
var reupload = document.getElementById ('wpForReUpload');
var destFile = document.getElementById ('wpDestFile');
if (reupload)
UploadForm.isReupload = !!reupload.value;
else {
UploadForm.isReupload = destFile && (destFile.disabled || destFile.readOnly);
}
if (destFile && !!destFile.disabled) {
destFile.readOnly = true;
destFile.disabled = false;
}
if (destFile && UploadForm.isReupload) {
destFile.onkeyup = function (evt) {};
destFile.onchange = function (evt) {};
}
UploadForm.the_form = form;
if (!UploadForm.isReupload) {
UploadForm.check_initial_dest_file ();
UploadForm.addPreviewButton();
}
},
check_initial_dest_file : function ()
{
var dest_file = document.getElementById ('wpDestFile');
if ( dest_file && dest_file.value && dest_file.value.length > 0
&& wgUploadWarningObj && typeof (wgUploadWarningObj.keypress) == 'function')
{
wgUploadWarningObj.keypress();
}
},
makePreview : function (description, is_overwrite)
{
if ( is_overwrite )
{
UploadForm.showPreview (
'\<div style="border:1px solid red; padding:0.5em;"\>'
+ '\<div class="error"\>'
+ wpPreviewOverwriteError
+ '\<\/div\>'
+ '\<\/div\>'
);
} else {
var text = '\<div style="border:1px solid red; padding:0.5em;"\>\n'
+ '\<div class="previewnote"\>\n'
+ '\{\{int:previewnote\}\}\n'
+ '\<\/div>\n';
var license = document.getElementById ('wplicenses');
var license_text = null;
if ( license != null && license.selectedIndex >= 0
&& license.options[license.selectedIndex].value.length > 0) {
license_text = '\{\{' + license.options[license.selectedIndex].value + '\}\}';
}
if (license_text) {
text = "{{FileInfo|game=" + description + "|licensing=" + license + "}}";
} else {
text = text + description + '\n';
}
text = text + '\<\/div\>';
// Make the Ajax call
var req = sajax_init_object ();
if (!req) return;
var button = document.getElementById ('wpUploadPreview');
var page = document.getElementById ('wpDestFile');
if (page) page = page.value;
if (page != null && page.length == 0) page = null;
if (button && typeof (injectSpinner) == 'function')
injectSpinner (button, 'wpUploadPreviewSpinner');
var uri = wgServer + wgScriptPath + '/api.php';
var args = 'action=parse&pst&text=' + encodeURIComponent (text)
+ (page ? '&title=File:' + encodeURIComponent (page.replace (/ /g, '_')) : "")
+ '&prop=text|categories&format=json';
// "&pst" is "Pre-save transform": tilde replacement, pipe magic for links like [[foo|foo]].
// Don't use a callback directly, add the function call ourselves *after* the call, since
// the API somehow resolves tildes to an IP number instead of the username if a callback
// is used. C.f. https://bugzilla.wikimedia.org/show_bug.cgi?id=16616
// Apparently, that's a feature, not a bug...
var request_length = uri.length + args.length + 1;
if (!!window.ActiveXObject && request_length > 2000 || request_length > 8100) {
// IE has a URL limit of 2083 character (2048 in the path), WMF servers appear to have an 8kB
// limit;
req.open ('POST', uri, true);
req.setRequestHeader ('Content-Type', 'application/x-www-form-urlencoded');
} else {
uri += '?' + args; args = null;
req.open ('GET', uri, true);
}
req.setRequestHeader ('Pragma', 'cache=no');
req.setRequestHeader ('Cache-Control', 'no-transform');
req.onreadystatechange =
function ()
{
if (req.readyState != 4) return;
if (typeof (removeSpinner) == 'function') removeSpinner ('wpUploadPreviewSpinner');
if (req.status != 200) return;
// Add the "callback"...
if (req.responseText && req.responseText.indexOf ('{') == 0)
// Primitive sanity check. If the response text does *not* start with '{', it might have been
// spoofed and contain a function call... of course, this simple check cannot catch more
// elaborate spoof attempts.
eval ('UploadForm.jsonPreview (' + req.responseText + ')');
};
req.send (args);
}
},
jsonPreview : function (result)
{
if (result && result.parse && result.parse.text && result.parse.text['*'] != null) {
var txt = result.parse.text['*'];
var categories = result.parse.categories;
if (categories && categories.length > 0) {
// Add a mock-up of a category bar. We don't care about non-existing categories, and we
// can't identify hidden categories.
var catbar = '<div class="catlinks"><div id="mw-normal-catlinks">'
+ wpCategoriesUploadLbl;
categories.sort (
function (a, b) {
var key_a = a['*'].toLowerCase (), key_b = b['*'].toLowerCase ();
if (key_a < key_b) return -1;
if (key_a > key_b) return 1;
return 0;
}
);
for (var i = 0; i < categories.length; i++) {
var catname = categories[i]['*'];
if (catname && catname.length > 0) {
if (i > 0) catbar += ' |';
catbar += ' <a ' + 'href="/wiki/Category:' + encodeURI (catname) + '">'
+ catname.replace(/_/g, ' ') + '</a>';
}
}
catbar += '</div></div>';
// Now insert it into text.
var end = txt.lastIndexOf ('</div>');
txt = txt.substring (0, end) + catbar + '</div>';
}
UploadForm.showPreview (txt);
}
},
isOverwrite : function () {
if (document.getElementById ('wpUploadWarningFileexists') != null) return true;
var destfile_warning = document.getElementById ('wpDestFile-warning');
if (destfile_warning == null) return false;
var dest_file = document.getElementById ('wpDestFile');
if (dest_file == null || dest_file.value == null || dest_file.value.length == 0) return false;
var lks = destfile_warning.getElementsByTagName ('a');
if (lks == null || lks.length == 0) return false;
var fn1 =
dest_file.value.replace(/^\s\s*/, '').replace(/\s\s*$/, '').replace(/ /g, '_');
fn1 = fn1.substr (0, 1).toUpperCase () + fn1.substring (1);
var fn0 = 'Image:' + fn1;
fn1 = 'File:' + fn1;
// Trimmed, blanks replaced by underscores, first character capitalized
for (var i = 0; i < lks.length; i++) {
var href = lks[i].getAttribute ('href', 2);
if (href.indexOf (wgScript + '?') == 0 || href.indexOf (wgServer + wgScript + '?') == 0) {
var m = /[&?]title=([^&]*)/.exec (href);
if (m && m.length > 1) href = m[1]; else href = null;
} else {
var prefix = wgArticlePath.replace ('$1', "");
if (href.indexOf (prefix) != 0) prefix = wgServer + prefix; // Fully expanded URL?
if (href.indexOf (prefix) == 0) href = href.substring (prefix.length); else href = null;
}
if (!href) continue;
href = decodeURIComponent (href).replace (/ /g, '_');
if (href == fn0 || href == fn1) return true;
}
return false;
},
isChildOf : function (child, ancestor)
{
if (!ancestor) return false;
while (child && child != ancestor) child = child.parentNode;
return (child == ancestor);
},
showPreview : function (result)
{
var preview = document.getElementById ('wpUploadPreviewDisplay');
if (preview == null) {
var before = document.getElementById ('mw-upload-permitted');
if (!before || UploadForm.isChildOf (before, UploadForm.the_form))
before = UploadForm.the_form;
if (!before) return; // Don't know where to insert preview display. Error message here?
preview = document.createElement ('div');
preview.setAttribute ('id', 'wpUploadPreviewDisplay');
before.parentNode.insertBefore (preview, before);
}
try {
preview.innerHTML = result;
} catch (ex) {
preview.innerHTML = ""; // Error message here instead?
}
preview.style.display = ""; // Show it
preview.scrollIntoView();
},
addPreviewButton : function ()
{
var request = sajax_init_object ();
// If we don't have Ajax, our preview won't work anyway.
if (request == null) return;
var uploadButton = document.getElementsByName ('wpUpload')[0]; // Has no ID...
// If we can't find the upload button, we don't know where to insert the preview button.
if (uploadButton == null) return;
var previewButton = document.createElement ('input');
previewButton.setAttribute ('id', 'wpUploadPreview');
previewButton.setAttribute ('name', 'wpUploadPreview');
previewButton.type = 'button';
previewButton.accessKey = 'p';
previewButton.value = wpPreviewUploadLbl;
previewButton.title = wpPreviewUploadTooltip + ' [p]';
previewButton.onclick = UploadForm.preview;
previewButton.setAttribute ('style', 'margin-left: 0.5em;');
updateTooltipAccessKeys([previewButton]);
uploadButton.parentNode.insertBefore (previewButton, uploadButton.nextSibling);
},
preview : function (evt)
{
var overwrite = UploadForm.isOverwrite ();
var desc = document.getElementById ('wpgames');
UploadForm.makePreview (desc.value, overwrite);
return true;
}
};
}
hookEvent ('load', UploadForm.install);
// </source>