pjs/suite/browser/metadata.js

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JavaScript

/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is this file as it was released on
* January 3, 2001.
*
* The Initial Developer of the Original Code is Jonas Sicking.
* Portions created by Jonas Sicking are Copyright (C) 2000
* Jonas Sicking. All Rights Reserved.
*
* Contributor(s):
* Jonas Sicking <sicking@bigfoot.com> (Original Author)
* Gervase Markham <gerv@gerv.net>
* Heikki Toivonen <heikki@netscape.com>
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL"), in which case the provisions of the GPL are applicable
* instead of those above. If you wish to allow use of your
* version of this file only under the terms of the GPL and not to
* allow others to use your version of this file under the MPL,
* indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by
* the GPL. If you do not delete the provisions above, a recipient
* may use your version of this file under either the MPL or the
* GPL.
*
*/
const XLinkNS = "http://www.w3.org/1999/xlink";
const XULNS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
const XMLNS = "http://www.w3.org/XML/1998/namespace";
const XHTMLNS = "http://www.w3.org/1999/xhtml";
var gMetadataBundle;
var gLangBundle;
var gRegionBundle;
var nodeView;
var htmlMode = false;
var onLink = false;
var onImage = false;
var onInsDel = false;
var onQuote = false;
var onMisc = false;
var onTable = false;
var onTitle = false;
var onLang = false;
function onLoad()
{
gMetadataBundle = document.getElementById("bundle_metadata");
gLangBundle = document.getElementById("bundle_languages");
gRegionBundle = document.getElementById("bundle_regions");
showMetadataFor(window.arguments[0]);
nodeView = window.arguments[0].ownerDocument.defaultView;
}
function showMetadataFor(elem)
{
// skip past non-element nodes
while (elem && elem.nodeType != Node.ELEMENT_NODE)
elem = elem.parentNode;
if (!elem) {
alert(gMetadataBundle.getString("unableToShowProps"));
window.close();
}
if (elem.ownerDocument.getElementsByName && !elem.ownerDocument.namespaceURI)
htmlMode = true;
// htmllocalname is "" if it's not an html tag, or the name of the tag if it is.
var htmllocalname = "";
if (isHTMLElement(elem,"")) {
htmllocalname = elem.localName.toLowerCase();
}
// We only look for images once
checkForImage(elem, htmllocalname);
// Walk up the tree, looking for elements of interest.
// Each of them could be at a different level in the tree, so they each
// need their own boolean to tell us to stop looking.
while (elem && elem.nodeType == Node.ELEMENT_NODE) {
if (!onLink) checkForLink(elem, htmllocalname);
if (!onInsDel) checkForInsDel(elem, htmllocalname);
if (!onQuote) checkForQuote(elem, htmllocalname);
if (!onTable) checkForTable(elem, htmllocalname);
if (!onTitle) checkForTitle(elem, htmllocalname);
if (!onLang) checkForLang(elem, htmllocalname);
elem = elem.parentNode;
htmllocalname = "";
if (isHTMLElement(elem,"")) {
htmllocalname = elem.localName.toLowerCase();
}
}
// Decide which sections to show
var onMisc = onTable || onTitle || onLang;
if (!onMisc) hideNode("misc-sec");
if (!onLink) hideNode("link-sec");
if (!onImage) hideNode("image-sec");
if (!onInsDel) hideNode("insdel-sec");
if (!onQuote) hideNode("quote-sec");
// Fix the Misc section visibilities
if (onMisc) {
if (!onTable) hideNode("misc-tblsummary");
if (!onLang) hideNode("misc-lang");
if (!onTitle) hideNode("misc-title");
}
// Get rid of the "No properties" message. This is a backstop -
// it should really never show, as long as nsContextMenu.js's
// checking doesn't get broken.
if (onLink || onImage || onInsDel || onQuote || onMisc)
hideNode("no-properties")
}
function checkForImage(elem, htmllocalname)
{
var img;
var imgType; // "img" = <img>
// "object" = <object>
// "input" = <input type=image>
// "background" = css background (to be added later)
if (htmllocalname === "img") {
img = elem;
imgType = "img";
} else if (htmllocalname === "object" &&
elem.type.substring(0,6) == "image/" &&
elem.data) {
img = elem;
imgType = "object";
} else if (htmllocalname === "input" &&
elem.type.toUpperCase() == "IMAGE") {
img = elem;
imgType = "input";
} else if (htmllocalname === "area" || htmllocalname === "a") {
// Clicked in image map?
var map = elem;
while (map && map.nodeType == Node.ELEMENT_NODE && !isHTMLElement(map,"map") )
map = map.parentNode;
if (map && map.nodeType == Node.ELEMENT_NODE)
img = getImageForMap(map);
}
if (img) {
setInfo("image-url", img.src);
if ("width" in img) {
setInfo("image-width", img.width);
setInfo("image-height", img.height);
}
else {
setInfo("image-width", "");
setInfo("image-height", "");
}
if (imgType == "img") {
setInfo("image-desc", getAbsoluteURL(img.longDesc, img));
} else {
setInfo("image-desc", "");
}
onImage = true;
}
}
function checkForLink(elem, htmllocalname)
{
if ((htmllocalname === "a" && elem.href != "") ||
htmllocalname === "area") {
setInfo("link-lang", convertLanguageCode(elem.getAttribute("hreflang")));
setInfo("link-url", elem.href);
setInfo("link-type", elem.getAttribute("type"));
setInfo("link-rel", elem.getAttribute("rel"));
setInfo("link-rev", elem.getAttribute("rev"));
target = elem.target;
switch (target) {
case "_top":
setInfo("link-target", gMetadataBundle.getString("sameWindowText"));
break;
case "_parent":
setInfo("link-target", gMetadataBundle.getString("parentFrameText"));
break;
case "_blank":
setInfo("link-target", gMetadataBundle.getString("newWindowText"));
break;
case "":
case "_self":
if (elem.ownerDocument != elem.ownerDocument.defaultView._content.document)
setInfo("link-target", gMetadataBundle.getString("sameFrameText"));
else
setInfo("link-target", gMetadataBundle.getString("sameWindowText"));
break;
default:
setInfo("link-target", "\"" + target + "\"");
}
onLink = true;
}
else if (elem.getAttributeNS(XLinkNS,"href") != "") {
setInfo("link-url", getAbsoluteURL(elem.getAttributeNS(XLinkNS,"href"),elem));
setInfo("link-lang", "");
setInfo("link-type", "");
setInfo("link-rel", "");
setInfo("link-rev", "");
switch (elem.getAttributeNS(XLinkNS,"show")) {
case "embed":
setInfo("link-target", gMetadataBundle.getString("embeddedText"));
break;
case "new":
setInfo("link-target", gMetadataBundle.getString("newWindowText"));
break;
case "":
case "replace":
if (elem.ownerDocument != elem.ownerDocument.defaultView._content.document)
setInfo("link-target", gMetadataBundle.getString("sameFrameText"));
else
setInfo("link-target", gMetadataBundle.getString("sameWindowText"));
break;
default:
setInfo("link-target", "");
break;
}
onLink = true;
}
}
function checkForInsDel(elem, htmllocalname)
{
if ((htmllocalname === "ins" || htmllocalname === "del") &&
(elem.cite || elem.dateTime)) {
setInfo("insdel-cite", getAbsoluteURL(elem.cite, elem));
setInfo("insdel-date", elem.dateTime);
onInsDel = true;
}
}
function checkForQuote(elem, htmllocalname)
{
if ((htmllocalname === "q" || htmllocalname === "blockquote") && elem.cite) {
setInfo("quote-cite", getAbsoluteURL(elem.cite, elem));
onQuote = true;
}
}
function checkForTable(elem, htmllocalname)
{
if (htmllocalname === "table" && elem.summary) {
setInfo("misc-tblsummary", elem.summary);
onTable = true;
}
}
function checkForLang(elem, htmllocalname)
{
if ((htmllocalname && elem.lang) || elem.getAttributeNS(XMLNS, "lang")) {
var abbr;
if (htmllocalname && elem.lang)
abbr = elem.lang;
else
abbr = elem.getAttributeNS(XMLNS, "lang");
setInfo("misc-lang", convertLanguageCode(abbr));
onLang = true;
}
}
function checkForTitle(elem, htmllocalname)
{
if (htmllocalname && elem.title) {
setInfo("misc-title", elem.title);
onTitle = true;
}
}
/*
* Set text of node id to value
* if value="" the node with specified id is hidden.
* Node should be have one of these forms
* <xul:label id="id-text" value=""/>
* <xul:description id="id-text"/>
*/
function setInfo(id, value)
{
if (value == "") {
hideNode(id);
return;
}
var node = document.getElementById(id+"-text");
if (node.namespaceURI == XULNS && node.localName == "label") {
node.setAttribute("value",value);
} else if (node.namespaceURI == XULNS && node.localName == "description") {
while (node.hasChildNodes())
node.removeChild(node.firstChild);
node.appendChild(node.ownerDocument.createTextNode(value));
}
}
// Hide node with specified id
function hideNode(id)
{
var style = document.getElementById(id).getAttribute("style");
document.getElementById(id).setAttribute("style", "display:none;" + style);
}
// opens the link contained in the node's "value" attribute.
function openLink(node)
{
var url = node.getAttribute("value");
nodeView._content.document.location = url;
window.close();
}
/*
* Find <img> or <object> which uses an imagemap.
* If more then one object is found we can't determine which one
* was clicked.
*
* This code has to be changed once bug 1882 is fixed.
* Once bug 72527 is fixed this code should use the .images collection.
*/
function getImageForMap(map)
{
var mapuri = "#" + map.getAttribute("name");
var multipleFound = false;
var img;
var list = getHTMLElements(map.ownerDocument, "img");
for (var i=0; i < list.length; i++) {
if (list.item(i).getAttribute("usemap") == mapuri) {
if (img) {
multipleFound = true;
break;
} else {
img = list.item(i);
imgType = "img";
}
}
}
list = getHTMLElements(map.ownerDocument, "object");
for (i = 0; i < list.length; i++) {
if (list.item(i).getAttribute("usemap") == mapuri) {
if (img) {
multipleFound = true;
break;
} else {
img = list.item(i);
imgType = "object";
}
}
}
if (multipleFound)
img = null;
return img;
}
/*
* Takes care of XMLBase and <base>
* url is the possibly relative url.
* node is the node where the url was given (needed for XMLBase)
*
* This function is called in many places as a workaround for bug 72524
* Once bug 72522 is fixed this code should use the Node.baseURI attribute
*
* for node==null or url=="", empty string is returned
*/
function getAbsoluteURL(url, node)
{
if (!url || !node)
return "";
var urlArr = new Array(url);
var doc = node.ownerDocument;
if (node.nodeType == Node.ATTRIBUTE_NODE)
node = node.ownerElement;
while (node && node.nodeType == Node.ELEMENT_NODE) {
if (node.getAttributeNS(XMLNS, "base") != "")
urlArr.unshift(node.getAttributeNS(XMLNS, "base"));
node = node.parentNode;
}
// Look for a <base>.
var baseTags = getHTMLElements(doc,"base");
if (baseTags && baseTags.length) {
urlArr.unshift(baseTags[baseTags.length - 1].getAttribute("href"));
}
// resolve everything from bottom up, starting with document location
var ioService = Components.classes["@mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService);
var URL = ioService.newURI(doc.location.href, null);
for (var i=0; i<urlArr.length; i++) {
URL.spec = URL.resolve(urlArr[i]);
}
return URL.spec;
}
function getHTMLElements(node, name)
{
if (htmlMode)
return node.getElementsByTagName(name);
return node.getElementsByTagNameNS(XHTMLNS, name);
}
// name should be in lower case
function isHTMLElement(node, name)
{
if (node.nodeType != Node.ELEMENT_NODE)
return false;
if (htmlMode)
return !name || node.localName.toLowerCase() == name;
return (!name || node.localName == name) && node.namespaceURI == XHTMLNS;
}
// This function coded according to the spec at:
// http://www.bath.ac.uk/~py8ieh/internet/discussion/metadata.txt
function convertLanguageCode(abbr)
{
if (!abbr) return "";
var result;
var tokens = abbr.split("-");
if (tokens[0] === "x" || tokens[0] === "i")
{
// x and i prefixes mean unofficial ones. So we upper-case the first
// word and leave the rest.
tokens.shift();
if (tokens[0])
{
// Upper-case first letter
result = tokens[0].substr(0, 1).toUpperCase() + tokens[0].substr(1);
tokens.shift();
if (tokens[0])
{
// Add on the rest as space-separated strings inside the brackets
result += " (" + tokens.join(" ") + ")";
}
}
}
else
{
// Otherwise we treat the first as a lang, the second as a region
// and the rest as strings.
try
{
result = gLangBundle.getString(tokens[0]);
}
catch (e)
{
// Language not present in lang bundle
result = tokens[0];
}
tokens.shift();
if (tokens[0])
{
try
{
// We don't add it on to the result immediately
// because we want to get the spacing right.
tokens[0] = gRegionBundle.getString(tokens[0].toLowerCase());
}
catch (e)
{
// Region not present in region bundle
}
result += " (" + tokens.join(" ") + ")";
}
}
return result;
}