1: # The LearningOnline Network with CAPA
2: # edit mode helpers
3: # 3/20 Guy
4: package Apache::edit;
5:
6: use strict;
7: use Apache::lonnet;
8:
9: # Global Vars
10: # default list of colors to use in editing
11: @Apache::edit::colorlist=('#ffffff','#ff0000','#00ff00','#0000ff','#0ff000','#000ff0','#f0000f');
12: # depth of nesting of edit
13: $Apache::edit::colordepth=0;
14:
15: sub initialize_edit {
16: $Apache::edit::colordepth=0;
17: }
18:
19: sub tag_start {
20: my ($target,$token,$description) = @_;
21: my $result='';
22: if ($target eq "edit") {
23: my $tag=$token->[1];
24: if (!$description) { $description="<$tag>"; }
25: $result.= &start_table($token)."<tr><td>$description</td>
26: <td>Delete".
27: &deletelist($target,$token)
28: ."</td>
29: <td>".
30: &insertlist($target,$token).
31: "</td>
32: </tr><tr><td colspan=\"3\">\n";
33: }
34: return $result;
35: }
36:
37: sub tag_end {
38: my ($target,$token,$description) = @_;
39: my $result='';
40: if ($target eq 'edit') {
41: my $tag=$token->[1];
42: if (!defined($description)) {
43: $result.="</td></tr><tr><td></$tag></td><td colspan=\"2\"> </td>";
44: } else {
45: if ($description ne '') { $result.="</td></tr><tr><td>$description</td><td colspan=\"2\"> </td>"; }
46: }
47: $result.="</tr>".&end_table()."\n";
48: }
49: return $result;
50: }
51:
52: sub start_table {
53: my ($token)=@_;
54: my $tag = $token->[1];
55: my $tagnum;
56: foreach my $namespace (reverse @Apache::lonxml::namespace) {
57: my $testtag=$Apache::lonxml::namespace['-1'].'::'.$tag;
58: $tagnum=$Apache::lonxml::insertlist{"$testtag.num"};
59: if (defined($tagnum)) { last; }
60: }
61: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
62: my $color = $Apache::lonxml::insertlist{"$tagnum.color"};
63: if (!defined($color)) {
64: $color = $Apache::edit::colorlist[$Apache::edit::colordepth];
65: }
66: $Apache::edit::colordepth++;
67: my $result="<table bgcolor=\"$color\" width=\"100%\" border=\"5\">";
68: return $result;
69: }
70:
71: sub end_table {
72: $Apache::edit::colordepth--;
73: my $result="</table>";
74: return $result;
75: }
76:
77: sub deletelist {
78: my ($target,$token) = @_;
79: my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">
80: <option></option>
81: <option>Yes</option>
82: </select>";
83: return $result;
84: }
85:
86: sub handle_delete {
87: if (!$ENV{"form.delete_$Apache::lonxml::curdepth"}) { return ''; }
88: my ($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
89: my $result=0;
90: if ($space) {
91: my $sub1="$space\:\:delete_$token->[1]";
92: {
93: no strict 'refs';
94: if (defined &$sub1) {
95: $result=&$sub1($target,$token,$tagstack,$parstack,$parser,$safeeval,$style);
96: }
97: }
98: }
99: if (!$result) {
100: my $endtag='/'.$token->[1];
101: my $bodytext=&Apache::lonxml::get_all_text($endtag,$$parser[$#$parser]);
102: $$parser['-1']->get_token();
103: &Apache::lonxml::debug("Deleting :$bodytext: for $token->[1]");
104: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
105: }
106: return 1;
107: }
108:
109: sub get_insert_list {
110: my ($token) = @_;
111: my $result='';
112: my @tagnums= ();
113: #&Apache::lonxml::debug("keys ".join("\n",sort(keys(%Apache::lonxml::insertlist))));
114: if ($Apache::lonxml::insertlist{"$token->[1].which"}) {
115: push (@tagnums, @{ $Apache::lonxml::insertlist{"$token->[1].which"} });
116: }
117: foreach my $namespace (@Apache::lonxml::namespace) {
118: if ($Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"}) {
119: push (@tagnums, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"} });
120: }
121: }
122: if (@tagnums) {
123: foreach my $tagnum (@tagnums) {
124: $result.='<option value="'.$tagnum.'">'.$Apache::lonxml::insertlist{"$tagnum.description"}."</option>\n";
125: }
126: if ($result) { $result='<option selected="on"></option>'.$result; }
127: }
128: return $result;
129: }
130:
131: sub insertlist {
132: my ($target,$token) = @_;
133: my $result;
134: if ($target eq 'edit') {
135: my $optionlist= &get_insert_list($token);
136: if ($optionlist) {
137: $result = "Insert:
138: <select name=\"insert_$Apache::lonxml::curdepth\">
139: $optionlist
140: </select>"
141: } else {
142: $result=" ";
143: }
144: }
145: return $result;
146: }
147:
148: sub handle_insert {
149: if (!$ENV{"form.insert_$Apache::lonxml::curdepth"}) { return ''; }
150: my $result;
151: my $tagnum = $ENV{"form.insert_$Apache::lonxml::curdepth"};
152: my $func=$Apache::lonxml::insertlist{"$tagnum.function"};
153: if ($func eq 'default') {
154: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
155: my $namespace;
156: if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
157: $result.="\n<$newtag>\n</$newtag>";
158: } else {
159: {
160: no strict 'refs';
161: $result.=&$func();
162: }
163: }
164: return $result;
165: }
166:
167: sub insert_optionresponse {
168: return '
169: <optionresponse max="10">
170: <foilgroup options="">
171: </foilgroup>
172: <hintgroup>
173: </hintgroup>
174: </optionresponse>';
175: }
176:
177: sub editfield {
178: my ($tag,$data,$description,$minwidth,$minheight)=@_;
179:
180: my $count=0;
181: my $maxlength=-1;
182: map { $count++;
183: if (length($_) > $maxlength) { $maxlength = length ($_); }
184: } split ("\n", $data);
185: if ($maxlength > 80) { $maxlength = 80; }
186: if ($maxlength < $minwidth) { $maxlength = $minwidth; }
187: if ( $count < $minheight) { $count = $minheight; }
188: if ($description) {
189: $description="<br />".$description."<br />";
190: }
191: return "$description\n <textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea>\n";
192: # return "<br />\n<$tag><br />\n <textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea><br />\n</$tag><br />\n";
193: }
194:
195: sub modifiedfield {
196: my ($token) = @_;
197: my $result;
198: # foreach my $envkey (sort keys %ENV) {
199: # &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");
200: # }
201: # &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");
202: # &Apache::lonxml::debug($ENV{"form.homework_edit_$Apache::lonxml::curdepth"});
203: $result=$ENV{"form.homework_edit_$Apache::lonxml::curdepth"};
204: if (defined $token) {
205: if (defined $token->[4]) {
206: $result=$token->[4].$result;
207: } else {
208: $result=$result.$token->[2];
209: }
210: }
211: return $result;
212: }
213:
214: sub insert_startouttext {
215: return "<startouttext />\n<endouttext />";
216: }
217:
218: sub insert_script {
219: return "\n<script type=\"loncapa/perl\">\n</script>";
220: }
221:
222: # Returns a 1 if the toekn has been modified and you should rebuild the tag
223: # side-effects, will modify the $token if new values are found
224: sub get_new_args {
225: my ($token,$parstack,$safeeval,@args)=@_;
226: my $rebuild=0;
227: foreach my $arg (@args) {
228: my $value=&Apache::lonxml::get_param($arg,$parstack,$safeeval);
229: my $newvalue=$ENV{"form.$Apache::lonxml::curdepth.$arg"};
230: &Apache::lonxml::debug(" for:$arg: cur is :$value: new is :$newvalue:");
231: if ($value ne $newvalue) {
232: $token->[2]->{$arg}=$newvalue;
233: $rebuild=1;
234: }
235: }
236: return $rebuild;
237: }
238:
239: sub rebuild_tag {
240: my ($token) = @_;
241: my $result;
242: if ($token->[0] eq 'S') {
243: $result = '<'.$token->[1];
244: while (my ($key,$val)= each(%{$token->[2]})) {
245: &Apache::lonxml::debug("setting :$key: to :$val:");
246: $result.=' '.$key.'="'.$val.'"';
247: }
248: $result.=">";
249: } elsif ( $token->[0] eq 'E' ) {
250: $result = '</'.$token->[1].'>';
251: }
252: return $result;
253: }
254:
255: sub text_arg {
256: my ($description,$name,$token,$size) = @_;
257: my $result;
258: if (!defined $size) { $size=20; }
259: my $arg=$token->[2]{$name};
260: $result=$description.'<input name="'."$Apache::lonxml::curdepth.$name".
261: '" type="text" value="'.$arg.'" size="'.$size.'" />';
262: return $result;
263: }
264:
265: sub select_arg {
266: my ($description,$name,$list,$token) = @_;
267: my $result;
268: my $optionlist="";
269: my $selected=$token->[2]{$name};
270: foreach my $option (@$list) {
271: if ( $selected eq $option ) {
272: $optionlist.="<option selected=\"on\">$option</option>\n";
273: } else {
274: $optionlist.="<option>$option</option>\n";
275: }
276: }
277: $result.=$description.'<select name="'."$Apache::lonxml::curdepth.$name".'">
278: '.$optionlist.'
279: </select></td></tr><tr><td colspan="3">';
280: return $result;
281: }
282:
283: 1;
284: __END__
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