From 408036b09cb1b48b974b18a7c66c05df543e886d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Petazzoni?= <jerome.petazzoni@gmail.com>
Date: Wed, 8 Nov 2017 00:08:00 -0800
Subject: [PATCH] Implement checker for slides too high/too wide

---
 slides/slidechecker.js | 54 +++++++++++++++++++++++++++++++++++++++---
 1 file changed, 51 insertions(+), 3 deletions(-)

diff --git a/slides/slidechecker.js b/slides/slidechecker.js
index 71ef205c..5036a236 100755
--- a/slides/slidechecker.js
+++ b/slides/slidechecker.js
@@ -9,13 +9,61 @@ page.onResourceError = function(resourceError) {
   console.log('ResourceError: ' + resourceError.url);
 }
 
+page.onConsoleMessage = function(msg) {
+  console.log('Console: ' +msg);
+}
+
 console.log('Loading: ' + url);
 page.open(url, function(status) {
   console.log('Loaded: ' + url + '(' + status + ')');
-  var slides = page.evaluate(function() {
-    return document.getElementsByClassName('remark-slide-container');
+
+  /* analyze will be an object with:
+   *
+   * titles
+   * A dict with all the titles that are too high
+   * (i.e. because they have been broken across multiple
+   * lines because they are too long)
+   *
+   * slides
+   * A dict with the slides that are too high
+   *
+   * n_slides
+   * Number of slides found
+   */
+  var analyze = page.evaluate(function() {
+    var ret = {}, i, n = slideshow.getSlideCount();
+    ret.titles = {};
+    ret.slides = {};
+    ret.n_slides = n;
+    for (i=1; i<=n; i++) {
+      console.log('Current slide: ' + i + '/' + n);
+      var visible_slide = document.getElementsByClassName('remark-visible')[0];
+      ['h1', 'h2'].forEach(function(tag) {
+        var titles = visible_slide.getElementsByTagName(tag);
+        console.log('Found ' + titles.length + ' titles with tag ' + tag);
+        titles.forEach(function(t) {
+          if (t.clientHeight>60) {
+            ret.titles[t.textContent] = i;
+          }
+        });
+      });
+      var scaler = visible_slide.getElementsByClassName('remark-slide-scaler')[0];
+      var slide = scaler.getElementsByClassName('remark-slide')[0];
+      if (slide.clientHeight > scaler.clientHeight) {
+        ret.slides[slide.textContent] = i;
+      }
+      slideshow.gotoNextSlide();
+    }
+    return ret;
   });
-  console.log('Number of slides: ' + slides.length);
+  Object.keys(analyze.titles).forEach(function(t) {
+    console.log('Title overflow on slide ' + analyze.titles[t] +': ' + t);
+  });
+  Object.keys(analyze.slides).forEach(function(s) {
+    console.log('Slide overflow: ' + analyze.slides[s]);
+  })
+  console.log('Number of slides: ' + analyze.n_slides);
+
   console.log('Done: ' + url + '(' + status + ')');
   phantom.exit();
 });