User:Proteins/showmathderivations.js
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Documentation for this user script can be added at User:Proteins/showmathderivations. |
//<pre>
// Script to allow readers to see the derivations of mathematical results
//
// To use this script, add "importScript('User:Proteins/showmathderivations.js');" to your monobook.js subpage
// under your user page, as you can see at User:Proteins/monobook.js
function showMathDerivations() {
var alert_string = "";
var error_string = "";
var derivation_string = "";
var del_derivation_string = "";
var body_content;
var span_nodes;
var temp_span_node;
var num_span_nodes = 0;
var span_node_index = 0;
var temp_derivation;
var temp_derivation_step;
var mathematical_derivation_name = "";
var mathematical_derivation_list = new Array();
var mathematical_derivation_step_list = new Array();
var derivation_index = 0;
var num_mathematical_derivations = 0;
var step_index = 0;
var num_derivation_steps = 0;
//****************
// Initializations
//****************
num_mathematical_derivations = 0;
// Get the bodyContent node
body_content = document.getElementById('bodyContent');
if (!body_content) {
error_string = "ERROR: There is no bodyContent node in this article.";
window.alert(error_string);
return;
}
span_nodes = body_content.getElementsByTagName("SPAN");
if (!span_nodes) {
error_string = "ERROR: This page has no SPAN nodes.\n";
window.alert(error_string);
return;
}
num_span_nodes = span_nodes.length;
if (num_span_nodes < 1) {
error_string = "ERROR: This page has no SPAN nodes.\n";
window.alert(error_string);
return;
}
for (span_node_index=0; span_node_index<num_span_nodes; span_node_index ) {
temp_span_node = span_nodes[span_node_index];
if (!temp_span_node) { continue; }
if (temp_span_node.className == "mathematical_derivation") {
num_mathematical_derivations ;
mathematical_derivation_list.push(temp_span_node);
}
} // closes loop over the SPAN nodes in the main article
if (num_mathematical_derivations < 1) {
error_string = "No mathematical derivations were found on this page.";
window.alert(error_string);
return;
} else if (num_mathematical_derivations == 1) {
alert_string = "This page has one mathematical derivation.\n\n";
// window.alert(alert_string);
} else {
alert_string = "This page has " num_mathematical_derivations " mathematical derivations.\n\n";
alert_string = "These will be analyzed in individual pop-up windows.\n";
// window.alert(alert_string);
}
//***************************************************
// Loop over the mathematical derivations on the page
//***************************************************
for (derivation_index=1; derivation_index<=num_mathematical_derivations; derivation_index ) {
derivation_string = "Derivation " derivation_index " (of " num_mathematical_derivations " on this page):\n\n";
temp_derivation = mathematical_derivation_list[derivation_index-1];
if (!temp_derivation) {
error_string = "ERROR: Mathematical derivation " derivation_index " is undefined.\n";
window.alert(error_string);
continue;
}
// Get the name of the derivation
mathematical_derivation_name = temp_derivation.title;
if (!mathematical_derivation_name) {
error_string = "ERROR: No name is defined for mathematical derivation " derivation_index ".\n";
window.alert(error_string);
mathematical_derivation_name = "UNNAMED REACTION";
}
derivation_string = mathematical_derivation_name "\n\n";
// Find the number of steps in the derivation
span_nodes = temp_derivation.getElementsByTagName("SPAN");
if (!span_nodes) {
error_string = "ERROR: Mathematical derivation " derivation_index " has no SPAN nodes.\n";
window.alert(error_string);
return;
}
num_span_nodes = span_nodes.length;
if (num_span_nodes < 1) {
error_string = "ERROR: Mathematical derivation " derivation_index " has zero SPAN nodes.\n";
window.alert(error_string);
return;
}
for (span_node_index=0; span_node_index<num_span_nodes; span_node_index ) {
temp_span_node = span_nodes[span_node_index];
if (!temp_span_node) { continue; }
if (temp_span_node.className == "mathematical_derivation_step") {
num_derivation_steps ;
mathematical_derivation_step_list.push(temp_span_node);
}
} // closes loop over the SPAN nodes in this mathematical derivation
// Loop over the steps of the derivation
for (step_index=0; step_index<num_derivation_steps; step_index ) {
temp_derivation_step = mathematical_derivation_step_list[step_index];
if (!temp_derivation_step) {
error_string = "ERROR: Step " step_index " in mathematical derivation " derivation_index " is undefined.\n";
window.alert(error_string);
continue;
}
derivation_string = temp_derivation_step.title ": ";
del_derivation_string = temp_derivation_step.innerHTML;
del_derivation_string = del_derivation_string.replace(/<[^>] >/, "");
derivation_string = del_derivation_string "\n\n";
} // closes loop over derivation steps
derivation_string = "Q. E. D.";
// Print out the derivation
window.alert(derivation_string);
} // closes loop over mathematical derivations
} // closes function showMathDerivations()
$(function () {
mw.util.addPortletLink('p-cactions', 'javascript:showMathDerivations()', 'D', 'ca-showmathderiv', 'Show derivations of mathematical results', '', '');
});
//</pre>