Merge branch 'simbad_lookup' into 'jeroen'

Add SIMBAD lookup to J2000 page

See merge request !13

console/js/j2000.js

@@ -133,6 +133,7 @@ function j2000(element_name) {
 	this.button_preset_2 = new dt_ui_button(element_name + "_preset_2");
 	this.button_preset_3 = new dt_ui_button(element_name + "_preset_3");
 	this.button_preset_4 = new dt_ui_button(element_name + "_preset_4");
+	this.button_query = new dt_ui_button(element_name + "_query");
 
 	this.window.add([
 	    this.elem_filler, this.lbl_ra, this.lbl_dec,
@@ -142,7 +143,7 @@ function j2000(element_name) {
 	    this.button_enabled, this.button_dt_model_enabled, this.button_refraction,
 	    this.button_track, this.button_copy_pos, this.button_copy_sp,
 	    this.button_preset_0, this.button_preset_1, this.button_preset_2,
-	    this.button_preset_3, this.button_preset_4]);
+	    this.button_preset_3, this.button_preset_4, this.button_query]);
 
 	this.lbl_ra.text_set("Right ascension");
 	this.lbl_dec.text_set("Declination");
@@ -167,13 +168,14 @@ function j2000(element_name) {
 	this.button_preset_2.text_set("PSR B0329+54");
 	this.button_preset_3.text_set("Crab (M1)");
 	this.button_preset_4.text_set("Orion (M42)");
+	this.button_query.text_set("Search...");
 
 	this.window.resize_equal([
 	    this.elem_filler, this.lbl_ra, this.lbl_dec,
 	    this.lbl_pos_cur, this.val_ra_cur, this.val_dec_cur,
 	    this.lbl_sp_cur, this.val_ra_sp, this.val_dec_sp,
 	    this.lbl_sp_new, this.txt_ra_sp, this.txt_dec_sp]);
-	
+
 	this.window.align_vertical([
 	    this.elem_filler, this.lbl_pos_cur, this.lbl_sp_cur, this.lbl_sp_new], 5);
 
@@ -210,13 +212,13 @@ function j2000(element_name) {
 
 	this.window.resize_equal([
 	    this.button_preset_0, this.button_preset_1, this.button_preset_2,
-	    this.button_preset_3, this.button_preset_4]);
-	
+	    this.button_preset_3, this.button_preset_4, this.button_query]);
+
 	this.window.align_horizontal([this.lbl_dec, this.button_preset_0], 10);
 	this.window.align_vertical([
 	    this.button_preset_0, this.button_preset_1, this.button_preset_2,
-	    this.button_preset_3, this.button_preset_4]);
-	
+	    this.button_preset_3, this.button_preset_4, this.button_query]);
+
 	/*
 	
 		block behaviour.
@@ -299,16 +301,37 @@ function j2000(element_name) {
 		this.txt_dec_sp.value_set(dec);
 	}
 
-	this.button_preset_0.onclick = function() { 
+	this.button_preset_0.onclick = function() {
 		j2000_this.new_sp_set('23h23m26.0','058d48m00.0'); }
-	this.button_preset_1.onclick = function() { 
+	this.button_preset_1.onclick = function() {
 		j2000_this.new_sp_set('19h59m28.3565','40d40m02.099'); }
-	this.button_preset_2.onclick = function() { 
+	this.button_preset_2.onclick = function() {
 		j2000_this.new_sp_set('03h32m59.4','054d34m43.6'); }
 	this.button_preset_3.onclick = function() {
 		j2000_this.new_sp_set('05h34m31.9','22d00m52.2'); }
 	this.button_preset_4.onclick = function() {
 		j2000_this.new_sp_set('05h35m17.31','-5d23m28.0'); }
+	this.button_query.onclick = function() {
+		var name = prompt("Enter name of source to look up coordinates \n" +
+		                  "(prepend \"PSR \" for pulsars):", "");
+		if (name === null) {
+			return;
+		}
+		var xmlhttp = new XMLHttpRequest();
+		var lookup_url = "http://cdsweb.u-strasbg.fr/cgi-bin/nph-sesame/SIMBAD?";
+		xmlhttp.open("GET", lookup_url + encodeURIComponent(name), true);
+		var pattern = /%J .* = ([\+-\d]+) (\d+) ([\d\.]+) *([\+-\d]+) (\d+) ([\.\d]+)/;
+		xmlhttp.onload = function(e) {
+			var matches = pattern.exec(xmlhttp.responseText);
+			if (matches) {
+				j2000_this.new_sp_set(matches[1]+'h'+matches[2]+'m'+matches[3],
+				                      matches[4]+'d'+matches[5]+'m'+matches[6]);
+			} else {
+				alert("Query '" + name + "' did not give a result in SIMBAD");
+			}
+		}
+		xmlhttp.send();
+	}
 
 	this.copy_position = function() {
 		j2000_this.new_sp_set(j2000_this.ra_cur, j2000_this.dec_cur);