MDL-42105 questions: let attempts have a max fraction > 1.
[moodle.git] / question / engine / renderer.php
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d1b7e03d 1<?php
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2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
16
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17/**
18 * Renderers for outputting parts of the question engine.
19 *
017bc1d9 20 * @package moodlecore
d1b7e03d 21 * @subpackage questionengine
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22 * @copyright 2009 The Open University
23 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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24 */
25
26
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27defined('MOODLE_INTERNAL') || die();
28
29
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30/**
31 * This renderer controls the overall output of questions. It works with a
32 * {@link qbehaviour_renderer} and a {@link qtype_renderer} to output the
33 * type-specific bits. The main entry point is the {@link question()} method.
34 *
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35 * @copyright 2009 The Open University
36 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
d1b7e03d 37 */
729c372b 38class core_question_renderer extends plugin_renderer_base {
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39 public function get_page() {
40 return $this->page;
41 }
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42
43 /**
44 * Generate the display of a question in a particular state, and with certain
45 * display options. Normally you do not call this method directly. Intsead
46 * you call {@link question_usage_by_activity::render_question()} which will
47 * call this method with appropriate arguments.
48 *
49 * @param question_attempt $qa the question attempt to display.
50 * @param qbehaviour_renderer $behaviouroutput the renderer to output the behaviour
51 * specific parts.
52 * @param qtype_renderer $qtoutput the renderer to output the question type
53 * specific parts.
54 * @param question_display_options $options controls what should and should not be displayed.
55 * @param string|null $number The question number to display. 'i' is a special
56 * value that gets displayed as Information. Null means no number is displayed.
57 * @return string HTML representation of the question.
58 */
59 public function question(question_attempt $qa, qbehaviour_renderer $behaviouroutput,
60 qtype_renderer $qtoutput, question_display_options $options, $number) {
61
62 $output = '';
63 $output .= html_writer::start_tag('div', array(
64 'id' => 'q' . $qa->get_slot(),
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65 'class' => implode(' ', array(
66 'que',
67 $qa->get_question()->qtype->name(),
68 $qa->get_behaviour_name(),
69 $qa->get_state_class($options->correctness && $qa->has_marks()),
70 ))
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71 ));
72
73 $output .= html_writer::tag('div',
74 $this->info($qa, $behaviouroutput, $qtoutput, $options, $number),
75 array('class' => 'info'));
76
77 $output .= html_writer::start_tag('div', array('class' => 'content'));
78
79 $output .= html_writer::tag('div',
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80 $this->add_part_heading($qtoutput->formulation_heading(),
81 $this->formulation($qa, $behaviouroutput, $qtoutput, $options)),
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82 array('class' => 'formulation'));
83 $output .= html_writer::nonempty_tag('div',
84 $this->add_part_heading(get_string('feedback', 'question'),
7042a252 85 $this->outcome($qa, $behaviouroutput, $qtoutput, $options)),
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86 array('class' => 'outcome'));
87 $output .= html_writer::nonempty_tag('div',
88 $this->add_part_heading(get_string('comments', 'question'),
7042a252 89 $this->manual_comment($qa, $behaviouroutput, $qtoutput, $options)),
783af252 90 array('class' => 'comment'));
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91 $output .= html_writer::nonempty_tag('div',
92 $this->response_history($qa, $behaviouroutput, $qtoutput, $options),
93 array('class' => 'history'));
94
95 $output .= html_writer::end_tag('div');
96 $output .= html_writer::end_tag('div');
97 return $output;
98 }
99
100 /**
101 * Generate the information bit of the question display that contains the
102 * metadata like the question number, current state, and mark.
103 * @param question_attempt $qa the question attempt to display.
104 * @param qbehaviour_renderer $behaviouroutput the renderer to output the behaviour
105 * specific parts.
106 * @param qtype_renderer $qtoutput the renderer to output the question type
107 * specific parts.
108 * @param question_display_options $options controls what should and should not be displayed.
109 * @param string|null $number The question number to display. 'i' is a special
110 * value that gets displayed as Information. Null means no number is displayed.
111 * @return HTML fragment.
112 */
113 protected function info(question_attempt $qa, qbehaviour_renderer $behaviouroutput,
114 qtype_renderer $qtoutput, question_display_options $options, $number) {
115 $output = '';
116 $output .= $this->number($number);
117 $output .= $this->status($qa, $behaviouroutput, $options);
118 $output .= $this->mark_summary($qa, $options);
119 $output .= $this->question_flag($qa, $options->flags);
da729916 120 $output .= $this->edit_question_link($qa, $options);
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121 return $output;
122 }
123
124 /**
125 * Generate the display of the question number.
126 * @param string|null $number The question number to display. 'i' is a special
127 * value that gets displayed as Information. Null means no number is displayed.
128 * @return HTML fragment.
129 */
130 protected function number($number) {
131 $numbertext = '';
132 if (is_numeric($number)) {
133 $numbertext = get_string('questionx', 'question',
134 html_writer::tag('span', $number, array('class' => 'qno')));
135 } else if ($number == 'i') {
136 $numbertext = get_string('information', 'question');
137 }
138 if (!$numbertext) {
139 return '';
140 }
141 return html_writer::tag('h2', $numbertext, array('class' => 'no'));
142 }
143
144 /**
145 * Add an invisible heading like 'question text', 'feebdack' at the top of
146 * a section's contents, but only if the section has some content.
147 * @param string $heading the heading to add.
148 * @param string $content the content of the section.
149 * @return string HTML fragment with the heading added.
150 */
151 protected function add_part_heading($heading, $content) {
152 if ($content) {
153 $content = html_writer::tag('h3', $heading, array('class' => 'accesshide')) . $content;
154 }
155 return $content;
156 }
157
158 /**
159 * Generate the display of the status line that gives the current state of
160 * the question.
161 * @param question_attempt $qa the question attempt to display.
162 * @param qbehaviour_renderer $behaviouroutput the renderer to output the behaviour
163 * specific parts.
164 * @param question_display_options $options controls what should and should not be displayed.
165 * @return HTML fragment.
166 */
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167 protected function status(question_attempt $qa, qbehaviour_renderer $behaviouroutput,
168 question_display_options $options) {
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169 return html_writer::tag('div', $qa->get_state_string($options->correctness),
170 array('class' => 'state'));
171 }
172
173 /**
174 * Generate the display of the marks for this question.
175 * @param question_attempt $qa the question attempt to display.
176 * @param question_display_options $options controls what should and should not be displayed.
177 * @return HTML fragment.
178 */
179 protected function mark_summary(question_attempt $qa, question_display_options $options) {
180 if (!$options->marks) {
181 return '';
182 }
183
184 if ($qa->get_max_mark() == 0) {
185 $summary = get_string('notgraded', 'question');
186
187 } else if ($options->marks == question_display_options::MAX_ONLY ||
188 is_null($qa->get_fraction())) {
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189 $summary = get_string('markedoutofmax', 'question',
190 $qa->format_max_mark($options->markdp));
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191
192 } else {
0ff4bd08 193 $a = new stdClass();
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194 $a->mark = $qa->format_mark($options->markdp);
195 $a->max = $qa->format_max_mark($options->markdp);
196 $summary = get_string('markoutofmax', 'question', $a);
197 }
198
199 return html_writer::tag('div', $summary, array('class' => 'grade'));
200 }
201
202 /**
203 * Render the question flag, assuming $flagsoption allows it.
204 *
205 * @param question_attempt $qa the question attempt to display.
f7970e3c 206 * @param int $flagsoption the option that says whether flags should be displayed.
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207 */
208 protected function question_flag(question_attempt $qa, $flagsoption) {
209 global $CFG;
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210
211 $divattributes = array('class' => 'questionflag');
212
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213 switch ($flagsoption) {
214 case question_display_options::VISIBLE:
215 $flagcontent = $this->get_flag_html($qa->is_flagged());
216 break;
f1b3d3e0 217
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218 case question_display_options::EDITABLE:
219 $id = $qa->get_flag_field_name();
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220 // The checkbox id must be different from any element name, because
221 // of a stupid IE bug:
222 // http://www.456bereastreet.com/archive/200802/beware_of_id_and_name_attribute_mixups_when_using_getelementbyid_in_internet_explorer/
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223 $checkboxattributes = array(
224 'type' => 'checkbox',
225 'id' => $id . 'checkbox',
226 'name' => $id,
227 'value' => 1,
228 );
229 if ($qa->is_flagged()) {
230 $checkboxattributes['checked'] = 'checked';
231 }
232 $postdata = question_flags::get_postdata($qa);
233
234 $flagcontent = html_writer::empty_tag('input',
235 array('type' => 'hidden', 'name' => $id, 'value' => 0)) .
236 html_writer::empty_tag('input', $checkboxattributes) .
237 html_writer::empty_tag('input',
238 array('type' => 'hidden', 'value' => $postdata, 'class' => 'questionflagpostdata')) .
239 html_writer::tag('label', $this->get_flag_html($qa->is_flagged(), $id . 'img'),
240 array('id' => $id . 'label', 'for' => $id . 'checkbox')) . "\n";
241
242 $divattributes = array(
243 'class' => 'questionflag editable',
244 'aria-atomic' => 'true',
245 'aria-relevant' => 'text',
246 'aria-live' => 'assertive',
247 );
248
d1b7e03d 249 break;
f1b3d3e0 250
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251 default:
252 $flagcontent = '';
253 }
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254
255 return html_writer::nonempty_tag('div', $flagcontent, $divattributes);
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256 }
257
258 /**
259 * Work out the actual img tag needed for the flag
260 *
f7970e3c 261 * @param bool $flagged whether the question is currently flagged.
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262 * @param string $id an id to be added as an attribute to the img (optional).
263 * @return string the img tag.
264 */
265 protected function get_flag_html($flagged, $id = '') {
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266 if ($flagged) {
267 $icon = 'i/flagged';
268 $alt = get_string('flagged', 'question');
269 } else {
270 $icon = 'i/unflagged';
271 $alt = get_string('notflagged', 'question');
272 }
273 $attributes = array(
274 'src' => $this->pix_url($icon),
275 'alt' => $alt,
276 );
d1b7e03d 277 if ($id) {
22c97c64 278 $attributes['id'] = $id;
d1b7e03d 279 }
22c97c64 280 $img = html_writer::empty_tag('img', $attributes);
d1b7e03d 281 if ($flagged) {
22c97c64 282 $img .= ' ' . get_string('flagged', 'question');
d1b7e03d 283 }
22c97c64 284 return $img;
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285 }
286
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287 protected function edit_question_link(question_attempt $qa,
288 question_display_options $options) {
289 global $CFG;
290
291 if (empty($options->editquestionparams)) {
292 return '';
293 }
294
295 $params = $options->editquestionparams;
296 if ($params['returnurl'] instanceof moodle_url) {
a530d4a9 297 $params['returnurl'] = $params['returnurl']->out_as_local_url(false);
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298 }
299 $params['id'] = $qa->get_question()->id;
300 $editurl = new moodle_url('/question/question.php', $params);
301
302 return html_writer::tag('div', html_writer::link(
c3847443 303 $editurl, $this->pix_icon('t/edit', get_string('edit'), '', array('class' => 'iconsmall')) .
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304 get_string('editquestion', 'question')),
305 array('class' => 'editquestion'));
306 }
307
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308 /**
309 * Generate the display of the formulation part of the question. This is the
310 * area that contains the quetsion text, and the controls for students to
311 * input their answers. Some question types also embed feedback, for
312 * example ticks and crosses, in this area.
313 *
314 * @param question_attempt $qa the question attempt to display.
315 * @param qbehaviour_renderer $behaviouroutput the renderer to output the behaviour
316 * specific parts.
317 * @param qtype_renderer $qtoutput the renderer to output the question type
318 * specific parts.
319 * @param question_display_options $options controls what should and should not be displayed.
320 * @return HTML fragment.
321 */
322 protected function formulation(question_attempt $qa, qbehaviour_renderer $behaviouroutput,
323 qtype_renderer $qtoutput, question_display_options $options) {
324 $output = '';
325 $output .= html_writer::empty_tag('input', array(
326 'type' => 'hidden',
327 'name' => $qa->get_control_field_name('sequencecheck'),
c7fbfe46 328 'value' => $qa->get_sequence_check_count()));
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329 $output .= $qtoutput->formulation_and_controls($qa, $options);
330 if ($options->clearwrong) {
331 $output .= $qtoutput->clear_wrong($qa);
332 }
333 $output .= html_writer::nonempty_tag('div',
334 $behaviouroutput->controls($qa, $options), array('class' => 'im-controls'));
335 return $output;
336 }
337
338 /**
339 * Generate the display of the outcome part of the question. This is the
340 * area that contains the various forms of feedback.
341 *
342 * @param question_attempt $qa the question attempt to display.
343 * @param qbehaviour_renderer $behaviouroutput the renderer to output the behaviour
344 * specific parts.
345 * @param qtype_renderer $qtoutput the renderer to output the question type
346 * specific parts.
347 * @param question_display_options $options controls what should and should not be displayed.
348 * @return HTML fragment.
349 */
350 protected function outcome(question_attempt $qa, qbehaviour_renderer $behaviouroutput,
351 qtype_renderer $qtoutput, question_display_options $options) {
352 $output = '';
353 $output .= html_writer::nonempty_tag('div',
354 $qtoutput->feedback($qa, $options), array('class' => 'feedback'));
355 $output .= html_writer::nonempty_tag('div',
356 $behaviouroutput->feedback($qa, $options), array('class' => 'im-feedback'));
357 return $output;
358 }
359
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360 protected function manual_comment(question_attempt $qa, qbehaviour_renderer $behaviouroutput,
361 qtype_renderer $qtoutput, question_display_options $options) {
362 return $qtoutput->manual_comment($qa, $options) .
363 $behaviouroutput->manual_comment($qa, $options);
364 }
365
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366 /**
367 * Generate the display of the response history part of the question. This
368 * is the table showing all the steps the question has been through.
369 *
370 * @param question_attempt $qa the question attempt to display.
371 * @param qbehaviour_renderer $behaviouroutput the renderer to output the behaviour
372 * specific parts.
373 * @param qtype_renderer $qtoutput the renderer to output the question type
374 * specific parts.
375 * @param question_display_options $options controls what should and should not be displayed.
376 * @return HTML fragment.
377 */
378 protected function response_history(question_attempt $qa, qbehaviour_renderer $behaviouroutput,
379 qtype_renderer $qtoutput, question_display_options $options) {
380
381 if (!$options->history) {
382 return '';
383 }
384
068b4594 385 $table = new html_table();
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386 $table->head = array (
387 get_string('step', 'question'),
388 get_string('time'),
389 get_string('action', 'question'),
390 get_string('state', 'question'),
391 );
392 if ($options->marks >= question_display_options::MARK_AND_MAX) {
393 $table->head[] = get_string('marks', 'question');
394 }
395
396 foreach ($qa->get_full_step_iterator() as $i => $step) {
397 $stepno = $i + 1;
d47d12d0 398
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399 $rowclass = '';
400 if ($stepno == $qa->get_num_steps()) {
401 $rowclass = 'current';
402 } else if (!empty($options->questionreviewlink)) {
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403 $url = new moodle_url($options->questionreviewlink,
404 array('slot' => $qa->get_slot(), 'step' => $i));
729c372b 405 $stepno = $this->output->action_link($url, $stepno,
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406 new popup_action('click', $url, 'reviewquestion',
407 array('width' => 450, 'height' => 650)),
5e8a85aa 408 array('title' => get_string('reviewresponse', 'question')));
d1b7e03d 409 }
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410
411 $restrictedqa = new question_attempt_with_restricted_history($qa, $i, null);
412
0ff4bd08 413 $user = new stdClass();
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414 $user->id = $step->get_user_id();
415 $row = array(
416 $stepno,
417 userdate($step->get_timecreated(), get_string('strftimedatetimeshort')),
418 s($qa->summarise_action($step)),
d47d12d0 419 $restrictedqa->get_state_string($options->correctness),
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420 );
421
422 if ($options->marks >= question_display_options::MARK_AND_MAX) {
423 $row[] = $qa->format_fraction_as_mark($step->get_fraction(), $options->markdp);
424 }
425
068b4594 426 $table->rowclasses[] = $rowclass;
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427 $table->data[] = $row;
428 }
429
430 return html_writer::tag('h3', get_string('responsehistory', 'question'),
431 array('class' => 'responsehistoryheader')) . html_writer::tag('div',
068b4594 432 html_writer::table($table, true), array('class' => 'responsehistoryheader'));
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433 }
434
435}