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 $result;
146: }
147:
148: sub handle_insert {
149: &Apache::lonxml::debug("Er handle insert called");
150: if ($ENV{"form.insert_$Apache::lonxml::curdepth"} eq '') { return ''; }
151: my $result;
152: my $tagnum = $ENV{"form.insert_$Apache::lonxml::curdepth"};
153: my $func=$Apache::lonxml::insertlist{"$tagnum.function"};
154: &Apache::lonxml::debug("Looking for :$func:");
155: if ($func eq 'default') {
156: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
157: my $namespace;
158: if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
159: $result.="\n<$newtag>\n</$newtag>";
160: } else {
161: if (defined(&$func)) {
162: {
163: no strict 'refs';
164: $result.=&$func();
165: }
166: } else {
167: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
168: &Apache::lonxml::error("Unable to insert tag $newtag, $func was not defined.");
169: }
170: }
171: return $result;
172: }
173:
174: sub insert_numericalresponse {
175: return '
176: <numericalresponse answer="">
177: <textline />
178: <hintgroup>
179: </hintgroup>
180: </numericalresponse>';
181: }
182:
183: sub insert_optionresponse {
184: return '
185: <optionresponse max="10">
186: <foilgroup options="">
187: </foilgroup>
188: <hintgroup>
189: </hintgroup>
190: </optionresponse>';
191: }
192:
193: sub editfield {
194: my ($tag,$data,$description,$minwidth,$minheight)=@_;
195:
196: my $count=0;
197: my $maxlength=-1;
198: map { $count++;
199: if (length($_) > $maxlength) { $maxlength = length ($_); }
200: } split ("\n", $data);
201: if ($maxlength > 80) { $maxlength = 80; }
202: if ($maxlength < $minwidth) { $maxlength = $minwidth; }
203: if ( $count < $minheight) { $count = $minheight; }
204: if ($description) {
205: $description="<br />".$description."<br />";
206: }
207: return "$description\n <textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea>\n";
208: # return "<br />\n<$tag><br />\n <textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea><br />\n</$tag><br />\n";
209: }
210:
211: sub modifiedfield {
212: my ($token) = @_;
213: my $result;
214: # foreach my $envkey (sort keys %ENV) {
215: # &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");
216: # }
217: # &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");
218: # &Apache::lonxml::debug($ENV{"form.homework_edit_$Apache::lonxml::curdepth"});
219: $result=$ENV{"form.homework_edit_$Apache::lonxml::curdepth"};
220: if (defined $token) {
221: if (defined $token->[4]) {
222: $result=$token->[4].$result;
223: } else {
224: $result=$result.$token->[2];
225: }
226: }
227: return $result;
228: }
229:
230: sub insert_startouttext {
231: return "<startouttext />\n<endouttext />";
232: }
233:
234: sub insert_script {
235: return "\n<script type=\"loncapa/perl\">\n</script>";
236: }
237:
238: # Returns a 1 if the token has been modified and you should rebuild the tag
239: # side-effects, will modify the $token if new values are found
240: sub get_new_args {
241: my ($token,$parstack,$safeeval,@args)=@_;
242: my $rebuild=0;
243: foreach my $arg (@args) {
244: my $value=&Apache::lonxml::get_param($arg,$parstack,$safeeval);
245: my $newvalue=$ENV{"form.$Apache::lonxml::curdepth.$arg"};
246: &Apache::lonxml::debug(" for:$arg: cur is :$value: new is :$newvalue:");
247: if ($value ne $newvalue) {
248: $token->[2]->{$arg}=$newvalue;
249: $rebuild=1;
250: }
251: }
252: return $rebuild;
253: }
254:
255: # looks for /> on start tags
256: sub rebuild_tag {
257: my ($token) = @_;
258: my $result;
259: if ($token->[0] eq 'S') {
260: $result = '<'.$token->[1];
261: while (my ($key,$val)= each(%{$token->[2]})) {
262: &Apache::lonxml::debug("setting :$key: to :$val:");
263: $result.=' '.$key.'="'.$val.'"';
264: }
265: if ($token->[4] =~ m:/>$:) {
266: $result.=' />';
267: } else {
268: $result.='>';
269: }
270: } elsif ( $token->[0] eq 'E' ) {
271: $result = '</'.$token->[1].'>';
272: }
273: return $result;
274: }
275:
276: sub text_arg {
277: my ($description,$name,$token,$size) = @_;
278: my $result;
279: if (!defined $size) { $size=20; }
280: my $arg=$token->[2]{$name};
281: $result=$description.'<input name="'."$Apache::lonxml::curdepth.$name".
282: '" type="text" value="'.$arg.'" size="'.$size.'" />';
283: return $result;
284: }
285:
286: sub select_arg {
287: my ($description,$name,$list,$token) = @_;
288: my $result;
289: my $optionlist="";
290: my $selected=$token->[2]{$name};
291: foreach my $option (@$list) {
292: if ( $selected eq $option ) {
293: $optionlist.="<option selected=\"on\">$option</option>\n";
294: } else {
295: $optionlist.="<option>$option</option>\n";
296: }
297: }
298: $result.=$description.'<select name="'."$Apache::lonxml::curdepth.$name".'">
299: '.$optionlist.'
300: </select></td></tr><tr><td colspan="3">';
301: return $result;
302: }
303:
304: 1;
305: __END__
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