From 2e4e8d16c77fb88293ae289c6f750c0ffd06d6f4 Mon Sep 17 00:00:00 2001
From: Tim Hunt <T.J.Hunt@open.ac.uk>
Date: Tue, 13 Jan 2015 13:55:33 +0000
Subject: [PATCH] MDL-48829 quiz nav: add a data attr to buttons giving the
 page

This way, if you need to know which page each button goes to in
JavaScript, you can find out.
---
 mod/quiz/attemptlib.php | 12 +++++++++++-
 mod/quiz/renderer.php   | 10 +++++-----
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/mod/quiz/attemptlib.php b/mod/quiz/attemptlib.php
index fe7044a25e5..3c2fa1a7aac 100644
--- a/mod/quiz/attemptlib.php
+++ b/mod/quiz/attemptlib.php
@@ -1683,12 +1683,21 @@ class quiz_attempt {
  * @since      Moodle 2.1
  */
 class quiz_nav_question_button implements renderable {
+    /** @var string id="..." to add to the HTML for this button. */
     public $id;
+    /** @var string number to display in this button. Either the question number of 'i'. */
     public $number;
+    /** @var string class to add to the class="" attribute to represnt the question state. */
     public $stateclass;
+    /** @var string Textual description of the question state, e.g. to use as a tool tip. */
     public $statestring;
+    /** @var int the page number this question is on. */
+    public $page;
+    /** @var bool true if this question is on the current page. */
     public $currentpage;
+    /** @var bool true if this question has been flagged. */
     public $flagged;
+    /** @var moodle_url the link this button goes to, or null if there should not be a link. */
     public $url;
 }
 
@@ -1734,7 +1743,8 @@ abstract class quiz_nav_panel_base {
                 $button->stateclass = 'complete';
             }
             $button->statestring = $this->get_state_string($qa, $showcorrectness);
-            $button->currentpage = $this->showall || $this->attemptobj->get_question_page($slot) == $this->page;
+            $button->page        = $this->attemptobj->get_question_page($slot);
+            $button->currentpage = $this->showall || $button->page == $this->page;
             $button->flagged     = $qa->is_flagged();
             $button->url         = $this->get_question_url($slot);
             $buttons[] = $button;
diff --git a/mod/quiz/renderer.php b/mod/quiz/renderer.php
index 4c9a1c0a028..9b746718655 100644
--- a/mod/quiz/renderer.php
+++ b/mod/quiz/renderer.php
@@ -335,11 +335,11 @@ class mod_quiz_renderer extends plugin_renderer_base {
      */
     protected function render_quiz_nav_question_button(quiz_nav_question_button $button) {
         $classes = array('qnbutton', $button->stateclass, $button->navmethod);
-        $attributes = array();
+        $extrainfo = array();
 
         if ($button->currentpage) {
             $classes[] = 'thispage';
-            $attributes[] = get_string('onthispage', 'quiz');
+            $extrainfo[] = get_string('onthispage', 'quiz');
         }
 
         // Flagged?
@@ -349,7 +349,7 @@ class mod_quiz_renderer extends plugin_renderer_base {
         } else {
             $flaglabel = '';
         }
-        $attributes[] = html_writer::tag('span', $flaglabel, array('class' => 'flagstate'));
+        $extrainfo[] = html_writer::tag('span', $flaglabel, array('class' => 'flagstate'));
 
         if (is_numeric($button->number)) {
             $qnostring = 'questionnonav';
@@ -359,12 +359,12 @@ class mod_quiz_renderer extends plugin_renderer_base {
 
         $a = new stdClass();
         $a->number = $button->number;
-        $a->attributes = implode(' ', $attributes);
+        $a->attributes = implode(' ', $extrainfo);
         $tagcontents = html_writer::tag('span', '', array('class' => 'thispageholder')) .
                         html_writer::tag('span', '', array('class' => 'trafficlight')) .
                         get_string($qnostring, 'quiz', $a);
         $tagattributes = array('class' => implode(' ', $classes), 'id' => $button->id,
-                                  'title' => $button->statestring);
+                                  'title' => $button->statestring, 'data-quiz-page' => $button->page);
 
         if ($button->url) {
             return html_writer::link($button->url, $tagcontents, $tagattributes);