From 865ecbcf009b8910a7309c2ebbc59c16f4fd4f69 Mon Sep 17 00:00:00 2001
From: Chris Warrick <kwpolska@gmail.com>
Date: Wed, 11 Nov 2020 02:49:49 +0100
Subject: [PATCH] Fix #3472, limit baguetteBox to <a> with <img>

Fix clicking on links to image files. baguetteBox now requires a
link (``<a>``) to have an ``<img>`` as a child in order to make the
link activate the lightbox.
---
 CHANGES.txt                                                 | 3 +++
 docs/manual.rst                                             | 4 +---
 nikola/data/themes/base-jinja/templates/base.tmpl           | 4 +---
 nikola/data/themes/base/templates/base.tmpl                 | 4 +---
 nikola/data/themes/bootblog4-jinja/templates/base.tmpl      | 4 +---
 nikola/data/themes/bootblog4/templates/base.tmpl            | 4 +---
 nikola/data/themes/bootstrap4-jinja/templates/base.tmpl     | 4 +---
 nikola/data/themes/bootstrap4/templates/base.tmpl           | 4 +---
 npm_assets/README-baguetteBox.md                            | 6 ++++++
 npm_assets/node_modules/baguettebox.js/dist/baguetteBox.js  | 4 ++--
 .../node_modules/baguettebox.js/dist/baguetteBox.min.js     | 2 +-
 scripts/update-npm-assets.sh                                | 3 +++
 12 files changed, 22 insertions(+), 24 deletions(-)
 create mode 100644 npm_assets/README-baguetteBox.md

diff --git a/CHANGES.txt b/CHANGES.txt
index ed810311eb..cf98b2cb3d 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -22,6 +22,9 @@ Bugfixes
 * Also fix symlinks when installing from source with pip; if possible,
   enable Developer Mode and run ``git config --global core.symlinks true``
   before cloning the Nikola repo
+* Fix clicking on links to image files. baguetteBox now requires a
+  link (``<a>``) to have an ``<img>`` as a child in order to make the
+  link activate the lightbox. (Issue #3472)
 * Fix ``LINK_CHECK_WHITELIST`` having issues due to mixing Unicode
   and bytestrings (Issue #3466)
 * Add support for ``nbconvert>=6.0.0`` (Issue #3457)
diff --git a/docs/manual.rst b/docs/manual.rst
index ba2809ce02..64783003ca 100644
--- a/docs/manual.rst
+++ b/docs/manual.rst
@@ -2000,9 +2000,7 @@ and put images there. Nikola will take care of creating thumbnails, index page,
 If you click on images on a gallery, or on images with links in post, you will
 see a bigger image, thanks to the excellent `baguetteBox
 <https://feimosi.github.io/baguetteBox.js/>`_.  If don’t want this behavior, add an
-``.islink`` class to your link. (The behavior is caused by ``<a
-class="reference">`` if you need to use it outside of galleries and reST
-thumbnails.)
+``.islink`` class to your link.
 
 The gallery pages are generated using the ``gallery.tmpl`` template, and you can
 customize it there (you could switch to another lightbox instead of baguetteBox, change
diff --git a/nikola/data/themes/base-jinja/templates/base.tmpl b/nikola/data/themes/base-jinja/templates/base.tmpl
index 23376eb5c1..8b057dbe05 100644
--- a/nikola/data/themes/base-jinja/templates/base.tmpl
+++ b/nikola/data/themes/base-jinja/templates/base.tmpl
@@ -32,9 +32,7 @@
     <script>
     baguetteBox.run('div#content', {
         ignoreClass: 'islink',
-        captions: function(element) {
-            return element.getElementsByTagName('img')[0].alt;
-    }});
+        captions: function(element){var i=element.getElementsByTagName('img')[0];return i===undefined?'':i.alt;}});
     </script>
     {{ body_end }}
     {{ template_hooks['body_end']() }}
diff --git a/nikola/data/themes/base/templates/base.tmpl b/nikola/data/themes/base/templates/base.tmpl
index ace9baa560..f071c955b0 100644
--- a/nikola/data/themes/base/templates/base.tmpl
+++ b/nikola/data/themes/base/templates/base.tmpl
@@ -32,9 +32,7 @@ ${template_hooks['extra_head']()}
     <script>
     baguetteBox.run('div#content', {
         ignoreClass: 'islink',
-        captions: function(element) {
-            return element.getElementsByTagName('img')[0].alt;
-    }});
+        captions: function(element){var i=element.getElementsByTagName('img')[0];return i===undefined?'':i.alt;}});
     </script>
     ${body_end}
     ${template_hooks['body_end']()}
diff --git a/nikola/data/themes/bootblog4-jinja/templates/base.tmpl b/nikola/data/themes/bootblog4-jinja/templates/base.tmpl
index 054c583f15..0adf4471e9 100644
--- a/nikola/data/themes/bootblog4-jinja/templates/base.tmpl
+++ b/nikola/data/themes/bootblog4-jinja/templates/base.tmpl
@@ -96,9 +96,7 @@
     <script>
     baguetteBox.run('div#content', {
         ignoreClass: 'islink',
-        captions: function(element) {
-            return element.getElementsByTagName('img')[0].alt;
-    }});
+        captions: function(element){var i=element.getElementsByTagName('img')[0];return i===undefined?'':i.alt;}});
     </script>
 {{ body_end }}
 {{ template_hooks['body_end']() }}
diff --git a/nikola/data/themes/bootblog4/templates/base.tmpl b/nikola/data/themes/bootblog4/templates/base.tmpl
index 022c5f3393..69b9d30c92 100644
--- a/nikola/data/themes/bootblog4/templates/base.tmpl
+++ b/nikola/data/themes/bootblog4/templates/base.tmpl
@@ -96,9 +96,7 @@ ${base.late_load_js()}
     <script>
     baguetteBox.run('div#content', {
         ignoreClass: 'islink',
-        captions: function(element) {
-            return element.getElementsByTagName('img')[0].alt;
-    }});
+        captions: function(element){var i=element.getElementsByTagName('img')[0];return i===undefined?'':i.alt;}});
     </script>
 ${body_end}
 ${template_hooks['body_end']()}
diff --git a/nikola/data/themes/bootstrap4-jinja/templates/base.tmpl b/nikola/data/themes/bootstrap4-jinja/templates/base.tmpl
index c2f12e9153..0748bb2afd 100644
--- a/nikola/data/themes/bootstrap4-jinja/templates/base.tmpl
+++ b/nikola/data/themes/bootstrap4-jinja/templates/base.tmpl
@@ -97,9 +97,7 @@ bg-dark
     <script>
     baguetteBox.run('div#content', {
         ignoreClass: 'islink',
-        captions: function(element) {
-            return element.getElementsByTagName('img')[0].alt;
-    }});
+        captions: function(element){var i=element.getElementsByTagName('img')[0];return i===undefined?'':i.alt;}});
     </script>
 {{ body_end }}
 {{ template_hooks['body_end']() }}
diff --git a/nikola/data/themes/bootstrap4/templates/base.tmpl b/nikola/data/themes/bootstrap4/templates/base.tmpl
index e1959c7ae2..21b6141694 100644
--- a/nikola/data/themes/bootstrap4/templates/base.tmpl
+++ b/nikola/data/themes/bootstrap4/templates/base.tmpl
@@ -97,9 +97,7 @@ ${base.late_load_js()}
     <script>
     baguetteBox.run('div#content', {
         ignoreClass: 'islink',
-        captions: function(element) {
-            return element.getElementsByTagName('img')[0].alt;
-    }});
+        captions: function(element){var i=element.getElementsByTagName('img')[0];return i===undefined?'':i.alt;}});
     </script>
 ${body_end}
 ${template_hooks['body_end']()}
diff --git a/npm_assets/README-baguetteBox.md b/npm_assets/README-baguetteBox.md
new file mode 100644
index 0000000000..788fb723f6
--- /dev/null
+++ b/npm_assets/README-baguetteBox.md
@@ -0,0 +1,6 @@
+BaguetteBox requires patching to make links to image files work.
+
+To patch:
+
+1. `patch node_modules/baguettebox.js/dist/baguetteBox.js baguetteBox-links-with-images-only.patch`
+2. Use <https://skalman.github.io/UglifyJS-online/> to create `baguetteBox.min.js` (make sure the license comment is preserved)
diff --git a/npm_assets/node_modules/baguettebox.js/dist/baguetteBox.js b/npm_assets/node_modules/baguettebox.js/dist/baguetteBox.js
index 3288636c2a..712dfbdfa8 100644
--- a/npm_assets/node_modules/baguettebox.js/dist/baguetteBox.js
+++ b/npm_assets/node_modules/baguettebox.js/dist/baguetteBox.js
@@ -194,9 +194,9 @@
                 tagsNodeList = galleryElement.getElementsByTagName('a');
             }
 
-            // Filter 'a' elements from those not linking to images
+            // Filter 'a' elements from those not linking to images, and not containing <img> tags (PATCHED)
             tagsNodeList = [].filter.call(tagsNodeList, function(element) {
-                if (element.className.indexOf(userOptions && userOptions.ignoreClass) === -1) {
+                if (element.className.indexOf(userOptions && userOptions.ignoreClass) === -1 && element.getElementsByTagName("img").length > 0) {
                     return regex.test(element.href);
                 }
             });
diff --git a/npm_assets/node_modules/baguettebox.js/dist/baguetteBox.min.js b/npm_assets/node_modules/baguettebox.js/dist/baguetteBox.min.js
index a6c7b04b49..6af785d43a 100644
--- a/npm_assets/node_modules/baguettebox.js/dist/baguetteBox.min.js
+++ b/npm_assets/node_modules/baguettebox.js/dist/baguetteBox.min.js
@@ -4,4 +4,4 @@
  * @version 1.11.1
  * @url https://github.com/feimosi/baguetteBox.js
  */
-!function(e,t){"use strict";"function"==typeof define&&define.amd?define(t):"object"==typeof exports?module.exports=t():e.baguetteBox=t()}(this,function(){"use strict";var r,l,u,c,d,f='<svg width="44" height="60"><polyline points="30 10 10 30 30 50" stroke="rgba(255,255,255,0.5)" stroke-width="4"stroke-linecap="butt" fill="none" stroke-linejoin="round"/></svg>',g='<svg width="44" height="60"><polyline points="14 10 34 30 14 50" stroke="rgba(255,255,255,0.5)" stroke-width="4"stroke-linecap="butt" fill="none" stroke-linejoin="round"/></svg>',p='<svg width="30" height="30"><g stroke="rgb(160,160,160)" stroke-width="4"><line x1="5" y1="5" x2="25" y2="25"/><line x1="5" y1="25" x2="25" y2="5"/></g></svg>',b={},v={captions:!0,buttons:"auto",fullScreen:!1,noScrollbars:!1,bodyClass:"baguetteBox-open",titleTag:!1,async:!1,preload:2,animation:"slideIn",afterShow:null,afterHide:null,onChange:null,overlayBackgroundColor:"rgba(0,0,0,.8)"},m={},h=[],o=0,n=!1,i={},a=!1,y=/.+\.(gif|jpe?g|png|webp)/i,w={},k=[],s=null,x=function(e){-1!==e.target.id.indexOf("baguette-img")&&j()},E=function(e){e.stopPropagation?e.stopPropagation():e.cancelBubble=!0,D()},C=function(e){e.stopPropagation?e.stopPropagation():e.cancelBubble=!0,X()},B=function(e){e.stopPropagation?e.stopPropagation():e.cancelBubble=!0,j()},T=function(e){i.count++,1<i.count&&(i.multitouch=!0),i.startX=e.changedTouches[0].pageX,i.startY=e.changedTouches[0].pageY},N=function(e){if(!a&&!i.multitouch){e.preventDefault?e.preventDefault():e.returnValue=!1;var t=e.touches[0]||e.changedTouches[0];40<t.pageX-i.startX?(a=!0,D()):t.pageX-i.startX<-40?(a=!0,X()):100<i.startY-t.pageY&&j()}},L=function(){i.count--,i.count<=0&&(i.multitouch=!1),a=!1},A=function(){L()},P=function(e){"block"===r.style.display&&r.contains&&!r.contains(e.target)&&(e.stopPropagation(),Y())};function S(e){if(w.hasOwnProperty(e)){var t=w[e].galleries;[].forEach.call(t,function(e){[].forEach.call(e,function(e){W(e.imageElement,"click",e.eventHandler)}),h===e&&(h=[])}),delete w[e]}}function F(e){switch(e.keyCode){case 37:D();break;case 39:X();break;case 27:j();break;case 36:!function t(e){e&&e.preventDefault();return M(0)}(e);break;case 35:!function n(e){e&&e.preventDefault();return M(h.length-1)}(e)}}function H(e,t){if(h!==e){for(h=e,function s(e){e=e||{};for(var t in v)b[t]=v[t],"undefined"!=typeof e[t]&&(b[t]=e[t]);l.style.transition=l.style.webkitTransition="fadeIn"===b.animation?"opacity .4s ease":"slideIn"===b.animation?"":"none","auto"===b.buttons&&("ontouchstart"in 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t(){r.requestFullscreen?r.requestFullscreen():r.webkitRequestFullscreen?r.webkitRequestFullscreen():r.mozRequestFullScreen&&r.mozRequestFullScreen()}(),setTimeout(function(){r.className="visible",b.bodyClass&&document.body.classList&&document.body.classList.add(b.bodyClass),b.afterShow&&b.afterShow()},50),b.onChange&&b.onChange(o,k.length),s=document.activeElement,Y(),n=!0)}function Y(){b.buttons?u.focus():d.focus()}function j(){b.noScrollbars&&(document.documentElement.style.overflowY="auto",document.body.style.overflowY="auto"),"none"!==r.style.display&&(W(document,"keydown",F),r.className="",setTimeout(function(){r.style.display="none",document.fullscreen&&function e(){document.exitFullscreen?document.exitFullscreen():document.mozCancelFullScreen?document.mozCancelFullScreen():document.webkitExitFullscreen&&document.webkitExitFullscreen()}(),b.bodyClass&&document.body.classList&&document.body.classList.remove(b.bodyClass),b.afterHide&&b.afterHide(),s&&s.focus(),n=!1},500))}function q(t,n){var e=k[t],o=h[t];if(void 0!==e&&void 0!==o)if(e.getElementsByTagName("img")[0])n&&n();else{var i=o.imageElement,a=i.getElementsByTagName("img")[0],s="function"==typeof b.captions?b.captions.call(h,i):i.getAttribute("data-caption")||i.title,r=function d(e){var t=e.href;if(e.dataset){var n=[];for(var o in e.dataset)"at-"!==o.substring(0,3)||isNaN(o.substring(3))||(n[o.replace("at-","")]=e.dataset[o]);for(var i=Object.keys(n).sort(function(e,t){return parseInt(e,10)<parseInt(t,10)?-1:1}),a=window.innerWidth*window.devicePixelRatio,s=0;s<i.length-1&&i[s]<a;)s++;t=n[i[s]]||t}return t}(i),l=J("figure");if(l.id="baguetteBox-figure-"+t,l.innerHTML='<div class="baguetteBox-spinner"><div class="baguetteBox-double-bounce1"></div><div class="baguetteBox-double-bounce2"></div></div>',b.captions&&s){var u=J("figcaption");u.id="baguetteBox-figcaption-"+t,u.innerHTML=s,l.appendChild(u)}e.appendChild(l);var c=J("img");c.onload=function(){var e=document.querySelector("#baguette-img-"+t+" 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t=Object.defineProperty({},"passive",{get:function(){e=!0}});window.addEventListener("test",null,t)}catch(n){}return e}(),function a(){if(r=G("baguetteBox-overlay"))return l=G("baguetteBox-slider"),u=G("previous-button"),c=G("next-button"),void(d=G("close-button"));(r=J("div")).setAttribute("role","dialog"),r.id="baguetteBox-overlay",document.getElementsByTagName("body")[0].appendChild(r),(l=J("div")).id="baguetteBox-slider",r.appendChild(l),(u=J("button")).setAttribute("type","button"),u.id="previous-button",u.setAttribute("aria-label","Previous"),u.innerHTML=m.svg?f:"&lt;",r.appendChild(u),(c=J("button")).setAttribute("type","button"),c.id="next-button",c.setAttribute("aria-label","Next"),c.innerHTML=m.svg?g:"&gt;",r.appendChild(c),(d=J("button")).setAttribute("type","button"),d.id="close-button",d.setAttribute("aria-label","Close"),d.innerHTML=m.svg?p:"&times;",r.appendChild(d),u.className=c.className=d.className="baguetteBox-button",function n(){var e=m.passiveEvents?{passive:!1}:null,t=m.passiveEvents?{passive:!0}:null;U(r,"click",x),U(u,"click",E),U(c,"click",C),U(d,"click",B),U(l,"contextmenu",A),U(r,"touchstart",T,t),U(r,"touchmove",N,e),U(r,"touchend",L),U(document,"focus",P,!0)}()}(),S(e),function s(e,a){var t=document.querySelectorAll(e),n={galleries:[],nodeList:t};return w[e]=n,[].forEach.call(t,function(e){a&&a.filter&&(y=a.filter);var t=[];if(t="A"===e.tagName?[e]:e.getElementsByTagName("a"),0!==(t=[].filter.call(t,function(e){if(-1===e.className.indexOf(a&&a.ignoreClass))return y.test(e.href)})).length){var i=[];[].forEach.call(t,function(e,t){var n=function(e){e.preventDefault?e.preventDefault():e.returnValue=!1,H(i,a),I(t)},o={eventHandler:n,imageElement:e};U(e,"click",n),i.push(o)}),n.galleries.push(i)}}),n.galleries}(e,t)},show:M,showNext:X,showPrevious:D,hide:j,destroy:function e(){!function n(){var 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\ No newline at end of file
+!function(e,t){"use strict";"function"==typeof define&&define.amd?define(t):"object"==typeof exports?module.exports=t():e.baguetteBox=t()}(this,function(){"use strict";var e,t,n,o,i,a='<svg width="44" height="60"><polyline points="30 10 10 30 30 50" stroke="rgba(255,255,255,0.5)" stroke-width="4"stroke-linecap="butt" fill="none" stroke-linejoin="round"/></svg>',s='<svg width="44" height="60"><polyline points="14 10 34 30 14 50" stroke="rgba(255,255,255,0.5)" stroke-width="4"stroke-linecap="butt" fill="none" stroke-linejoin="round"/></svg>',l='<svg width="30" height="30"><g stroke="rgb(160,160,160)" stroke-width="4"><line x1="5" y1="5" x2="25" y2="25"/><line x1="5" y1="25" x2="25" y2="5"/></g></svg>',r={},u={captions:!0,buttons:"auto",fullScreen:!1,noScrollbars:!1,bodyClass:"baguetteBox-open",titleTag:!1,async:!1,preload:2,animation:"slideIn",afterShow:null,afterHide:null,onChange:null,overlayBackgroundColor:"rgba(0,0,0,.8)"},c={},d=[],f=0,g=!1,p={},m=!1,b=/.+\.(gif|jpe?g|png|webp)/i,v={},h=[],y=null,w=function(e){-1!==e.target.id.indexOf("baguette-img")&&I()},k=function(e){e.stopPropagation?e.stopPropagation():e.cancelBubble=!0,q()},E=function(e){e.stopPropagation?e.stopPropagation():e.cancelBubble=!0,j()},x=function(e){e.stopPropagation?e.stopPropagation():e.cancelBubble=!0,I()},C=function(e){p.count++,p.count>1&&(p.multitouch=!0),p.startX=e.changedTouches[0].pageX,p.startY=e.changedTouches[0].pageY},B=function(e){if(!m&&!p.multitouch){e.preventDefault?e.preventDefault():e.returnValue=!1;var 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document.getElementById(e)}function W(e){return document.createElement(e)}return[].forEach||(Array.prototype.forEach=function(e,t){for(var n=0;n<this.length;n++)e.call(t,this[n],n,this)}),[].filter||(Array.prototype.filter=function(e,t,n,o,i){for(n=this,o=[],i=0;i<n.length;i++)e.call(t,n[i],i,n)&&o.push(n[i]);return o}),{run:function(r,u){var d;return c.transforms="undefined"!=typeof(d=W("div")).style.perspective||"undefined"!=typeof d.style.webkitPerspective,c.svg=function(){var e=W("div");return e.innerHTML="<svg/>","http://www.w3.org/2000/svg"===(e.firstChild&&e.firstChild.namespaceURI)}(),c.passiveEvents=function(){var e=!1;try{var t=Object.defineProperty({},"passive",{get:function(){e=!0}});window.addEventListener("test",null,t)}catch(e){}return e}(),function(){if(e=U("baguetteBox-overlay"))return t=U("baguetteBox-slider"),n=U("previous-button"),o=U("next-button"),void(i=U("close-button"));var r,u;(e=W("div")).setAttribute("role","dialog"),e.id="baguetteBox-overlay",document.getElementsByTagName("body")[0].appendChild(e),(t=W("div")).id="baguetteBox-slider",e.appendChild(t),(n=W("button")).setAttribute("type","button"),n.id="previous-button",n.setAttribute("aria-label","Previous"),n.innerHTML=c.svg?a:"&lt;",e.appendChild(n),(o=W("button")).setAttribute("type","button"),o.id="next-button",o.setAttribute("aria-label","Next"),o.innerHTML=c.svg?s:"&gt;",e.appendChild(o),(i=W("button")).setAttribute("type","button"),i.id="close-button",i.setAttribute("aria-label","Close"),i.innerHTML=c.svg?l:"&times;",e.appendChild(i),n.className=o.className=i.className="baguetteBox-button",r=c.passiveEvents?{passive:!1}:null,u=c.passiveEvents?{passive:!0}:null,z(e,"click",w),z(n,"click",k),z(o,"click",E),z(i,"click",x),z(t,"contextmenu",N),z(e,"touchstart",C,u),z(e,"touchmove",B,r),z(e,"touchend",T),z(document,"focus",L,!0)}(),A(r),function(e,t){var n=document.querySelectorAll(e),o={galleries:[],nodeList:n};return v[e]=o,[].forEach.call(n,function(e){t&&t.filter&&(b=t.filter);var n=[];if(n="A"===e.tagName?[e]:e.getElementsByTagName("a"),0!==(n=[].filter.call(n,function(e){if(-1===e.className.indexOf(t&&t.ignoreClass)&&e.getElementsByTagName("img").length>0)return b.test(e.href)})).length){var i=[];[].forEach.call(n,function(e,n){var o=function(e){e.preventDefault?e.preventDefault():e.returnValue=!1,S(i,t),F(n)},a={eventHandler:o,imageElement:e};z(e,"click",o),i.push(a)}),o.galleries.push(i)}}),o.galleries}(r,u)},show:X,showNext:j,showPrevious:q,hide:I,destroy:function(){var a,s;a=c.passiveEvents?{passive:!1}:null,s=c.passiveEvents?{passive:!0}:null,V(e,"click",w),V(n,"click",k),V(o,"click",E),V(i,"click",x),V(t,"contextmenu",N),V(e,"touchstart",C,s),V(e,"touchmove",B,a),V(e,"touchend",T),V(document,"focus",L,!0),function(){for(var e in 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\ No newline at end of file
diff --git a/scripts/update-npm-assets.sh b/scripts/update-npm-assets.sh
index b0fdfdc905..b7da0a5927 100755
--- a/scripts/update-npm-assets.sh
+++ b/scripts/update-npm-assets.sh
@@ -53,4 +53,7 @@ popd
 
 scripts/generate_symlinked_list.sh
 
+# Verify baguetteBox patch
+grep PATCHED npm_assets/node_modules/baguettebox.js/dist/baguetteBox.js > /dev/null || printf '%b' '\033[1;31mWARNING: baguetteBox must be manually patched (in both unminified and minified versions), see npm_assets/baguetteBox-links-with-images-only.patch\033[0m\n'
+
 # vim:tw=0