//<pre>
// Strip document hyperlinks (esp. wikilinks), leaving only their text; useful for FireVox screen reader
// Also fix bug 11555 (order of section title and edit link) and double caption
function stripHyperlinks() {
var alert_string = "";
var on_main_page = false;
var delete_line_breaks_in_mp_topbanner = false;
var strip_hyperlinks = true; // turn off to control stripping in some sections
var within_closing_section = false; // determine when we near the end of the article
var force_hyperlink_deletion = false;
var temp_hyperlink;
var temp_hyperlink_text;
var temp_anchor_name;
var hyperlinks;
var num_hyperlinks = 0;
var hyperlink_index = 0;
var hyperlink_counter = 0;
var num_hyperlinks_removed = 0;
var num_redlinks = 0;
var num_redlinks_removed = 0;
var parent_node;
var element_node;
var replacement_node;
var grandparent_node;
var next_sibling_node;
var prev_sibling_node;
var greatgrandparent_node;
var greatgreatgrandparent_node;
var child_node;
var num_child_nodes = 0;
var child_node_index = 0;
var headers;
var temp_header;
var num_headers = 0;
var header_index = 0;
var mw_headline_node;
var editsection_node;
var num_header_swaps = 0;
var total_num_header_swaps = 0;
var num_header_tag_strings = 0;
var header_tag_string_index = 0;
var header_tag_strings = [ "H2", "H3", "H4", "H5" ];
var temp_image;
var num_images = 0;
var num_pixels = 0;
var alt_string = "";
var image_index = 0;
var image_counter = 0;
var num_uncaptioned_images = 0;
// Check whether we're on the Main Page
on_main_page = false;
if (document.getElementById("mp-topbanner")) {
on_main_page = true;
// window.alert("We're reading the Main Page.");
// Try to remove two annoying linebeaks, per Graham87
if (delete_line_breaks_in_mp_topbanner == true) {
next_sibling_node = document.getElementById('articlecount');
element_node = next_sibling_node.previousSibling;
prev_sibling_node = element_node.previousSibling;
parent_node = next_sibling_code.parentNode;
//There no document subtree, just the text in two subsequent DIV's
child_node = document.createTextNode(element_node.innerHTML);
prev_sibling_node.appendChild(child_node);
child_node = document.createTextNode(next_sibling_node.innerHTML);
prev_sibling_node.appendChild(child_node);
parent_node.removeChild(element_node);
parent_node.removeChild(next_sibling_node);
}
} // closes check whether we're on the Main Page
// Fix bug 11555 for screen readers: swap order of "editsection" and "mw-headline" nodes in headings
alert_string = "";
total_num_header_swaps = 0;
num_header_tag_strings = header_tag_strings.length;
for (header_tag_string_index = 0; header_tag_string_index < num_header_tag_strings; header_tag_string_index++) {
headers = document.getElementsByTagName(header_tag_strings[header_tag_string_index]);
num_headers = headers.length;
num_header_swaps = 0;
for (header_index=1; header_index<num_headers; header_index++) {
temp_header = headers[header_index];
editsection_node = null;
mw_headline_node = null;
num_child_nodes = temp_header.childNodes.length;
for (child_node_index = 0; child_node_index < num_child_nodes; child_node_index++) {
child_node = temp_header.childNodes[child_node_index];
if (child_node.className == "editsection") {
editsection_node = child_node;
} else if (child_node.className == "mw-headline") {
mw_headline_node = child_node;
}
}
if ((editsection_node != null) && (mw_headline_node != null)) {
temp_header.insertBefore(mw_headline_node, editsection_node);
num_header_swaps++;
}
} // closes loop over headers of that type in document
total_num_header_swaps += num_header_swaps;
// alert_string += "Swapped nodes in " + num_header_swaps + " " + header_tag_strings[header_tag_string_index] + " headers.\n";
} // closes loop over different types of headers
// Acknowledgment
if (total_num_header_swaps == 1) {
alert_string += "Swapped text and edit link in one header.\n";
} else {
alert_string += "Swapped text and edit link in " + total_num_header_swaps + " headers.\n";
}
// Fix double reading of image captions
image_counter = 0;
num_uncaptioned_images = 0;
num_images = document.images.length;
for (image_index=0; image_index<num_images; image_index++) {
alt_string = "";
temp_image = document.images[image_index];
num_pixels = temp_image.width * temp_image.height;
if (num_pixels > 5000) {
image_counter++;
alt_string = "Image " + image_counter + ": ";
temp_image.alt = alt_string + temp_image.alt; // preface image with number
}
/*
if (temp_image.className == "thumbimage") {
if (temp_image.alt) {
num_uncaptioned_images++;
alt_string = "Image " + num_uncaptioned_images + ": ";
temp_image.alt = alt_string + temp_image.alt; // preface image with number
}
} else if (num_pixels > 5000) { // uncaptioned infobox images
num_uncaptioned_images++;
}
*/
}
// Acknowledgment
if (image_counter == 1) {
alert_string += "Modified ALT text of one image.\n";
} else {
alert_string += "Modified ALT text of " + image_counter + " images.\n";
}
// Proceed to main work of the script: eliminating hyperlinks
hyperlinks = document.getElementById("bodyContent").getElementsByTagName("a");
num_redlinks = 0;
num_redlinks_removed = 0;
within_closing_section = false;
num_hyperlinks = hyperlinks.length;
while (hyperlink_counter<num_hyperlinks) {
temp_hyperlink = hyperlinks[hyperlink_index];
hyperlink_counter++;
// Count the redlinks
if (temp_hyperlink.className == "new") { num_redlinks++; }
// Determine whether we've reached the end of the article
if ((temp_hyperlink.name) && (!within_closing_section)) {
temp_anchor_name = temp_hyperlink.name;
temp_anchor_name = temp_anchor_name.replace(/:$/ig,""); // eliminate colons at end
temp_anchor_name = temp_anchor_name.replace(/s$/ig,""); // eliminate plurals at end
temp_anchor_name = temp_anchor_name.replace(/See_also/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Related_topic/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Related_article/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Further_reading/ig,"");
temp_anchor_name = temp_anchor_name.replace(/External_link/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Footnote/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Note/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Reference/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Citation/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Source/ig,"");
temp_anchor_name = temp_anchor_name.replace(/Link/ig,"");
temp_anchor_name = temp_anchor_name.replace(/s([_\s]+)and([_\s]+)/ig,"");
temp_anchor_name = temp_anchor_name.replace(/([_\s]+)and([_\s]+)/ig,"");
temp_anchor_name = temp_anchor_name.replace(/([_\s]+)/ig,"");
if (temp_anchor_name == "") {
within_closing_section = true;
// window.alert("The end of the article begins with section \"" + temp_hyperlink.name + "\"\n");
}
} // closes check whether we've reached the end of the article
// allow some sections to be skipped
if (temp_hyperlink.name == "See_also") {
strip_hyperlinks = false;
} else if (temp_hyperlink.name == "Related_topics") {
strip_hyperlinks = false;
} else if (temp_hyperlink.name == "Related_articles") {
strip_hyperlinks = false;
} else if (temp_hyperlink.name) {
strip_hyperlinks = true;
}
// if ((strip_hyperlinks == false) && (temp_hyperlink.className != "new")) { continue; }
// criteria for keeping some links
if (!temp_hyperlink.title) { hyperlink_index++; continue; } // replace only wikilinks?
if (temp_hyperlink.getAttribute("accesskey")) { hyperlink_index++; continue; } // avoid command links
if (temp_hyperlink.className == "image") { hyperlink_index++; continue; } // keep images
if (temp_hyperlink.className == "internal") { hyperlink_index++; continue; } // keep Enlarge buttons
if (temp_hyperlink.className == "external text") { hyperlink_index++; continue; } // keep geotags, etc.
// if ((on_main_page) && (temp_hyperlink.className == "extiw")) { continue; } // interwiki links at bottom
// force the deletion of some types of links
force_hyperlink_deletion = false;
/*
if (temp_hyperlink.className == "new") {
force_hyperlink_deletion = true;
}
*/
// check ancestor links against criteria to keep other types of links
if (!force_hyperlink_deletion) {
parent_node = temp_hyperlink.parentNode;
grandparent_node = parent_node.parentNode;
greatgrandparent_node = grandparent_node.parentNode;
greatgreatgrandparent_node = greatgrandparent_node.parentNode;
//Save all bold links on the Main Page
if ((on_main_page) && (parent_node.nodeName == "B")) { hyperlink_index++; continue; }
// Save specific types of navigational links on the Main Page
// Save links in the mp-strapline
if ((on_main_page) && ((greatgreatgrandparent_node.id == "mp-strapline") || (greatgreatgrandparent_node.parentNode.id == "mp-strapline"))) { hyperlink_index++; continue; }
// Save "Recently featured:" links: most other parts use DIV; this section uses P as the parent
if ((on_main_page) && (parent_node.nodeName == "P")) {
next_sibling_node = parent_node.nextSibling;
if ((next_sibling_node) && (next_sibling_node.nextSibling)) {
next_sibling_node = next_sibling_node.nextSibling;
if ((next_sibling_node.nodeName == "DIV") && (next_sibling_node.className = "noprint")) { hyperlink_index++; continue; }
}
/*
diagnostic_string = temp_hyperlink.innerHTML;
diagnostic_string += "\nParent node: " + parent_node.nodeName;
if (parent_node.className) { diagnostic_string += "Class: " + parent_node.className; }
diagnostic_string += "\nSibling node: " + next_sibling_node.nodeName;
if (next_sibling_node.className) { diagnostic_string += "Class: " + next_sibling_node.className; }
diagnostic_string += "\nGrandparent node: " + grandparent_node.nodeName;
if (grandparent_node.className) { diagnostic_string += "Class: " + grandparent_node.className; }
window.alert(diagnostic_string);
*/
}
// if ((on_main_page) && (parent_node.nodeName == "P") && (grandparent_node.nodeName != "TD")) { hyperlink_index++; continue; }
// if ((on_main_page) && (parent_node.nodeName == "P") && (grandparent_node.nodeName != "TD") && (greatgrandparent_node.nodeName != "TD") && (greatgreatgrandparent_node.nodeName != "TD")) { hyperlink_index++; continue; }
// Imperfect solutions:
// if on Main Page and parent_node firstChild text equals "Recently featured: ": Language-specific is bad
// if on Main Page and nextSibling of parent is DIV with align=right and className=noprint and prevSibling has id mp-tfa
// next_sibling_node = parent_node.nextSibling;
// prev_sibling_node = parent_node.previousSibling;
//FAILED if ((on_main_page) && (parent_node.nodeName == "P") && (next_sibling_node.nodeName == "DIV") && (next_sibling_node.className == "noprint")) { hyperlink_index++; continue; }
//FAILED if ((on_main_page) && (parent_node.nodeName == "P") && (next_sibling_node.nodeName == "DIV") && (next_sibling_node.className == "noprint") && (grandparent_node.nodeName == "DIV")) { hyperlink_index++; continue; }
// Links that should be kept:
// keep links within most lists per Graham87's suggestion, but not References and Notes; allow anchor to be in italics
if (((parent_node.nodeName == "LI") || (grandparent_node.nodeName == "LI")) && (!on_main_page) && (grandparent_node.className != "references") && (greatgrandparent_node.className != "references-small") && (temp_hyperlink.className != "new")) {hyperlink_index++; continue; }
// keep section edit buttons
if (parent_node.className == "editsection") { hyperlink_index++; continue; }
// keep sidebar buttons
if (greatgrandparent_node.className == "pBody") { hyperlink_index++; continue; }
// keep category links
if ((greatgrandparent_node.className == "catlinks") || (grandparent_node.className == "catlinks")) { hyperlink_index++; continue; }
// keep disambiguations
if ((parent_node.className == "dablink") || (grandparent_node.className == "dablink") || (greatgrandparent_node.className == "dablink")) { hyperlink_index++; continue; }
// keep "Main article" links
if (grandparent_node.className == "noprint relarticle mainarticle") { hyperlink_index++; continue; }
// keep "Further details" links
if ((grandparent_node.className == "boilerplate seealso") || (grandparent_node.className == "boilerplate further")){ hyperlink_index++; continue; }
// keep protected and semi-protected icons
if (grandparent_node.className == "metadata plainlinks") { hyperlink_index++; continue; }
// keep links in sound samples
if ((parent_node.className == "medialist listenlist") || (grandparent_node.className == "medialist listenlist") || (greatgrandparent_node.className == "medialist listenlist")) { hyperlink_index++; continue; }
} // closes check for forced deletion of hyperlink
// Old technique for replacing link; fails for italicized text, and is not general
// temp_hyperlink_text = document.createTextNode(temp_hyperlink.innerHTML);
// parent_node.replaceChild(temp_hyperlink_text, temp_hyperlink);
// Better technique for replacing links: graft subtree back into the document
num_child_nodes = temp_hyperlink.childNodes.length;
for (child_node_index = 0; child_node_index < num_child_nodes; child_node_index++) {
child_node = temp_hyperlink.childNodes[0];
parent_node.insertBefore(child_node, temp_hyperlink);
}
parent_node.removeChild(temp_hyperlink);
num_hyperlinks_removed++;
// Count the redlinks removed
if (temp_hyperlink.className == "new") { num_redlinks_removed++; }
// Merge blocks of text that are adjacent in the document tree, prevent screen reader pauses
parent_node.normalize();
} // closes loop over hyperlinks
// Acknowledgment
if (num_redlinks == 1) {
alert_string += "Counted one redlink in the main article, removed " + num_redlinks_removed + ".\n";
} else {
alert_string += "Counted " + num_redlinks + " redlinks in the main article, removed " + num_redlinks_removed + ".\n";
}
if (num_hyperlinks_removed == 1) {
alert_string += "Removed one hyperlink from this article.";
} else {
alert_string += "Removed " + num_hyperlinks_removed + " hyperlinks from this article.";
}
window.alert(alert_string); // print combined alert string
} // closes function stripHyperlinks()
addOnloadHook(function () {
addPortletLink('p-cactions', 'javascript:stripHyperlinks()', 'Strip links', 'ca-nolinks', 'Strips links for screen readers like FireVox', 's', '');
});
//</pre>
