Annotation of loncom/html/res/adm/pages/reactionresponse/reaction_editor.html, revision 1.2
1.1 albertel 1: <!-- Chemical reaction editor developed by Guy Ashkenazi, guy@fh.huji.ac.il-->
2:
3: <!--
1.2 ! albertel 4: $Id: reaction_editor.html,v 1.1 2003/06/30 20:39:59 albertel Exp $
1.1 albertel 5:
6: Copyright Michigan State University Board of Trustees
7:
8: This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9:
10: LON-CAPA is free software; you can redistribute it and/or modify
11: it under the terms of the GNU General Public License as published by
12: the Free Software Foundation; either version 2 of the License, or
13: (at your option) any later version.
14:
15: LON-CAPA is distributed in the hope that it will be useful,
16: but WITHOUT ANY WARRANTY; without even the implied warranty of
17: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: GNU General Public License for more details.
19:
20: You should have received a copy of the GNU General Public License
21: along with LON-CAPA; if not, write to the Free Software
22: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23:
24: /home/httpd/html/adm/gpl.txt
25:
26: http://www.lon-capa.org/
27: -->
28:
29: <html>
30: <head>
31: <script type="text/javascript">
32: var rightarrow;
33: </script>
34: <!-- parsed by LON-CAPA to get the correct symbol for the arrow -->
35: <display>
36: return '<script type="text/javascript">
37: var rightarrow=\''.&xmlparse('<m>$\rightarrow$</m>').'\';
38: </script>';
39: </display>
40: <script language="JavaScript">
41:
42: var level;
43: var reactants;
44: var products;
45:
46:
47: function parse_reaction(string) {
48: var reaction_array = string.split('->');
49: var i;
50: reactants = new Array(0);
51: products = new Array(0);
52:
53: if (reaction_array.length > 0)
54: reactants = reaction_array[0].split(' +');
55: if (reaction_array.length > 1)
56: products = reaction_array[1].split(' +');
57: }
58:
59: function to_capa(string) {
60: var reaction = "";
61: var i;
62:
63: parse_reaction(string);
64:
65: for (i = 0; i < reactants.length; i++)
66: reactants[i] = capa_component(reactants[i]);
67: for (i = 0; i < products.length; i++)
68: products[i] = capa_component(products[i]);
69:
70: reactants.sort();
71: products.sort();
72:
73: for (i = 0; i < reactants.length-1; i++) {
74: reaction += reactants[i];
75: reaction += " + ";
76: }
77: if (i < reactants.length)
78: reaction += reactants[i];
79: if (products.length > 0) {
80: reaction += " -> ";
81: for (i = 0; i < products.length-1; i++) {
82: reaction += products[i];
83: reaction += " + ";
84: }
85: if (i < products.length)
86: reaction += products[i];
87: }
88:
89: return reaction;
90: }
91:
92: function capa_component(string) {
93: var reactant = "";
94: var i = 0;
95: level = 0;
96:
97: for (;string.substring(i,i+1) == ' ';i++)
98: ;
99: for (;isDigit(string.substring(i,i+1));i++)
100: reactant += string.substring(i,i+1);
101: for (;i < string.length;i++)
102: reactant += capa_char(string.substring(i,i+1));
103:
104: return reactant;
105: }
106:
107: function capa_char(chr) {
108: if (level == 0) { // baseline
109: if (chr == '^')
110: level = 1;
111: if (chr == ' ')
112: return "";
113: return chr;
114: }
115: if (level == 1) { // superscript
116: if (isDigit(chr))
117: return chr;
118: level = 0;
119: return chr;
120: }
121: }
122:
123: function to_html(string) {
124: var reaction = "";
125: var i;
126:
127: parse_reaction(string);
128: for (i = 0; i < reactants.length-1; i++) {
129: reaction += html_component(reactants[i]);
130: reaction += " + ";
131: }
132: if (i < reactants.length)
133: reaction += html_component(reactants[i]);
134:
135: if (products.length > 0) {
136: reaction += rightarrow;
137: for (i = 0; i < products.length-1; i++) {
138: reaction += html_component(products[i]);
139: reaction += " + ";
140: }
141: if (i < products.length)
142: reaction += html_component(products[i]);
143: }
144:
145: return reaction;
146: }
147:
148: function html_component(string) {
149: var reactant = "";
150: var i = 0;
151: level = 0;
152:
153: for (;string.substring(i,i+1) == ' ';i++)
154: ;
155: for (;isDigit(string.substring(i,i+1));i++)
156: reactant += string.substring(i,i+1);
157: for (;i < string.length;i++)
158: reactant += html_char(string.substring(i,i+1));
159:
160: return reactant;
161: }
162:
163: function html_char(chr) {
164: if (level == 0) { // baseline
165: if (isDigit(chr))
166: return chr.sub();
167: if (chr == '^') {
168: level = 1;
169: return "";
170: }
171: if (chr == '+') // baseline or superscript
172: return "?";
173: if (chr == ' ')
174: return "";
175: return chr;
176: }
177: if (level == 1) { // superscript
178: if (isDigit(chr))
179: return chr.sup();
180: if (chr == '+' || chr == '-') {
181: level = 0;
182: return chr.sup();
183: }
184: if (chr == ' ') {
185: level = 0;
186: return "";
187: }
188: level = 0;
189: return chr;
190: }
191: }
192:
193: function isDigit(string) {
194: if (string >= '0' && string <='9')
195: return 1;
196: else
197: return 0;
198: }
199:
200: function openHelpWindow() {
201: window.open("reaction_help.html","","scrollbars=yes,resizable=yes,width=550,height=600")
202: }
203:
204: function submitReaction() {
205: reaction = to_capa(document.form.text.value);
206: if (reaction == "") {
207: alert("Nothing to submit");
208: }
209: else {
210: name = "HWVAL_" + problem;
211: i = 0;
212: while (parent.opener.document.lonhomework.elements[i].name != name)
213: i++;
214: parent.opener.document.lonhomework.elements[i].value = reaction;
1.2 ! albertel 215: // parent.opener.document.lonhomework.submit();
! 216: parent.window.close();
1.1 albertel 217: }
218: }
219:
220: function getCookie(document,name) {
221: var dc = document.cookie;
222: var prefix = name + "=";
223: var begin = dc.indexOf("; " + prefix);
224: if (begin == -1) {
225: begin = dc.indexOf(prefix);
226: if (begin != 0) return null;
227: } else
228: begin += 2;
229: var end = document.cookie.indexOf(";", begin);
230: if (end == -1)
231: end = dc.length;
232: return unescape(dc.substring(begin + prefix.length, end));
233: }
234:
235:
236: </script>
237: </head>
238:
1.2 ! albertel 239: <body bgcolor="#ffffff" onLoad = "problem = getCookie(parent.opener.document,'problem'); document.form.submit.value='Insert reaction for Part #' + problem; parent.document.title='LON-CAPA#'+problem+' - Reaction Editor';">
1.1 albertel 240: <center>
241: <hr />
242: <form name="form">
243: <input type="text" size=50 name="text" />
244: <input type="button" value="Check" onClick = "parent.viewer.document.writeln('<center><br>'+to_html(document.form.text.value)+'</center>');parent.viewer.document.close()" /><br />
245: <br />
246: <input type="button" name="submit" value="Insert reaction for part #?" onClick = "submitReaction();" />
247: <br />
248: <input type="button" value=" Close " onClick = "parent.window.close()" />
249:
250: <input type="button" value=" Help " onClick = "openHelpWindow()" />
251: </form>
252: </center>
253: </body>
254: </html>
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