79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
// insert a backlink for a post given its short hash
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function nntpchan_backlink(shorthash) {
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var elem = document.getElementById("postform_message");
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if ( elem )
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{
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elem.value += ">>" + shorthash.substr(0,10) + "\n";
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}
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}
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// inject post hover behavior
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function inject_hover(prefix, el, parent) {
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if (!prefix) { throw "prefix is not defined"; }
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var linkhash = el.getAttribute("backlinkhash");
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if (!linkhash) { throw "linkhash undefined"; }
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console.log("rewrite linkhash "+linkhash);
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var elem = document.createElement("span");
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elem.setAttribute("class", "backlink_rewritten");
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elem.appendChild(document.createTextNode(">>"+linkhash.substr(0,10)));
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if (!parent) {
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parent = el.parentNode;
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}
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parent.removeChild(el);
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parent.appendChild(elem);
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elem.onclick = function(ev) {
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if(parent.backlink) {
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nntpchan_apicall(prefix+"api/find?hash="+linkhash, function(j) {
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var wrapper = document.createElement("div");
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wrapper.setAttribute("class", "hover "+linkhash);
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if (j == null) {
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// not found?
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wrapper.setAttribute("class", "hover notfound-hover "+linkhash);
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wrapper.appendChild(document.createTextNode("not found"));
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} else {
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// wrap backlink
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nntpchan_buildpost(wrapper, j);
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}
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parent.appendChild(wrapper);
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parent.backlink = false;
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}, function(msg) {
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var wrapper = document.createElement("div");
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wrapper.setAttribute("class", "hover "+linkhash);
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wrapper.appendChild(document.createTextNode(msg));
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parent.appendChild(wrapper);
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parent.backlink = false;
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});
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} else {
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var elems = document.getElementsByClassName(linkhash);
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if (!elems) throw "bad state, no backlinks open?";
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for (var idx = 0 ; idx < elems.length; idx ++ ) {
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elems[idx].parentNode.removeChild(elems[idx]);
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}
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parent.backlink = true;
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}
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};
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parent.backlink = true;
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}
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// inject post hover for all backlinks in an element
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function inject_hover_for_element(elem) {
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var elems = elem.getElementsByClassName("backlink");
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var ls = [];
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var l = elems.length;
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for ( var idx = 0 ; idx < l ; idx ++ ) {
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var e = elems[idx];
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ls.push(e);
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}
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for( var elem in ls ) {
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inject_hover(prefix, ls[elem]);
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}
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}
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function init(prefix) {
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// inject posthover ...
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inject_hover_for_element(document);
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}
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