diff -u /home/dto/Downloads/org-info-src.js /home/dto/notebook/org-info-src.js
--- /home/dto/Downloads/org-info-src.js	2022-12-10 11:47:20.086746072 -0500
+++ /home/dto/notebook/org-info-src.js	2022-12-24 10:18:38.010260115 -0500
@@ -28,30 +28,87 @@
  * </script>
  *
  *
- * The script is now roughly devided in sections by form-feeds. Editors can
- * move section wise using the common emacs commands for this purpos ('C-x ]'
- * and  'C-x ]').
+ * The script is now roughly divided into sections by
+ * form-feeds. Editors can move section-wise using the common emacs
+ * commands for this purpose ('C-x ]' and 'C-x ]').
  *
  * The sections are:
  *    1. This comment block.
- *    2. Everything around =OrgNodes=.
- *    3. =org_html_manager= constructor and setup.
- *    4. =org_html_manager= folding and view related stuff.
- *    5. =org_html_manager= history related methods.
- *    6. =org_html_manager= minibuffer handling.
- *    7. =org_html_manager= user input.
- *    8. =org_html_manager= search functonality.
- *    9. =org_html_manager= misc.
- *    10. Global functions.
+ *    2. Content hooks
+ *    3. Everything around =OrgNodes=.
+ *    4. =org_html_manager= constructor and setup.
+ *    5. =org_html_manager= folding and view related stuff.
+ *    6. =org_html_manager= history related methods.
+ *    7. =org_html_manager= minibuffer handling.
+ *    8. =org_html_manager= user input.
+ *    9. =org_html_manager= search functonality.
+ *    10. =org_html_manager= misc.
+ *    11. Global functions.
  */
 
+/**
+ * This program has been modified from its original version to add
+ * hooks for per-page HTML injection and per-click navigation event
+ * response. A patch is being submitted to upstream. 
+ *  - David T. O'Toole <deeteeoh1138@gmail.com>
+ */
 
 
 
 
+var OrgInfoCurrentSectionNumber = 0;
+
+/**
+ * The following variable should hold a function which accepts an
+ * integer pageNumber and should return HTML to be inserted in the
+ * OrgInfo header of each page.
+ */
+var OrgInfoPageInsertFunction = function(pageNumber) {return '';};
+
+
+/**
+ * The following variable should hold a function which accepts an
+ * integer pageNumber and performs a user-defined action after the
+ * page has flipped.
+ *
+ */
+var OrgInfoAfterNavigateFunction = function(pageNumber) {};
+
+/**
+ * The following variable should hold a function which performs a
+ * user-defined action after Plain View has been activated.
+ *
+ */
+
+var OrgInfoAfterPlainViewFunction = function() {};
+
+/**
+ * The following variable should hold a function which performs a
+ * user-defined action after Info View has been activated.
+ *
+ */
+
+var OrgInfoAfterInfoViewFunction = function() {};
+
+/**
+ * The following variable should hold a function which performs a
+ * user-defined action after the document is ready.
+ */
+
+var OrgInfoAfterReadyFunction = function() {};
+
+/**
+ * Custom keybindings for Z, K, and Y.
+ */
+var OrgInfoUserKeyZ = function () {};
+var OrgInfoUserKeyK = function () {};
+var OrgInfoUserKeyY = function () {};
+
+
+
 /**
  * Creates a new OrgNode.
- * An OrgOutline stores some refs to its assoziated node in the document tree
+ * An OrgOutline stores some refs to its associated node in the document tree
  * along with some additional properties.
  */
 function OrgNode ( _div, _heading, _link, _depth, _parent, _base_id, _toc_anchor)
@@ -87,8 +144,17 @@
     var fid =  _base_id.substring(4);
     folder = document.getElementById("text-"+fid); // try old schema
   }
-  if(null != folder)
-    t.FOLDER = folder;
+
+    if(null == folder)
+    {
+        if (null != t.BASE_ID) {
+            var did = OrgInfoRecoverSectionID(document.getElementById(t.BASE_ID).textContent);
+            folder = document.getElementById("text-"+did);
+        }
+    }
+    
+    if(null != folder)
+    { t.FOLDER = folder;}
 
   t.isTargetFor = new Object();
   t.isTargetFor['#' + t.BASE_ID] = 2;
@@ -434,7 +500,7 @@
           var v = sets[i].substring(pos+1);
           var k = sets[i].substring(0, pos);
           switch(k) {
-            // Explicitely allow overwrites.
+            // Explicitly allow overwrites.
             // Fall through:
           case 'TOC':
           case 'TOC_DEPTH':
@@ -634,6 +700,7 @@
     }
     t.HOOKS.run_hooks = true;                    // Unblock all hooks.
     t.runHooks('onReady', this.NODE);
+      OrgInfoAfterReadyFunction();
   },
 
 
@@ -734,7 +801,7 @@
       t.cutToc(theIndex, 1);
     }
 
-    // Move the title into the first visible section.
+    // Move the title into the first visible section.urrentpage
     // TODO: show title above everything if FIXED_TOC !!!
     t.TITLE = document.getElementsByClassName("title")[0];
     if(t.INNER_TITLE && !t.FIXED_TOC && t.VIEW != t.SLIDE_VIEW) {
@@ -754,7 +821,7 @@
 
     t.BODY.insertBefore(t.WINDOW, t.NODE.DIV);
 
-    return true;
+      return true;
   },
 
   /**
@@ -904,14 +971,16 @@
     for(var i = 0; i < this.SECS.length; ++i)
     {
       this.SECS[i].IDX = i;
-      var html = '<table class="org-info-js_info-navigation" width="100%" border="0" style="border-bottom:1px solid black;">'
-        +'<tr><td colspan="3" style="text-align:left;border-style:none;vertical-align:bottom;">'
-        +'<span style="float:left;display:inline;text-align:left;">'
-        +'Top: <a accesskey="t" href="javascript:org_html_manager.navigateTo(0);">'+index_name+'</a></span>'
-        +'<span style="float:right;display:inline;text-align:right;font-size:70%;">'
-        + this.LINKS
-        +'<a accesskey="m" href="javascript:org_html_manager.toggleView('+i+');">toggle view</a></span>'
-        +'</td></tr><tr><td style="text-align:left;border-style:none;vertical-align:bottom;width:22%">';
+        var html =
+            OrgInfoPageInsertFunction(i)
+            + '<table class="org-info-js_info-navigation" width="100%" border="0" style="border-bottom:1px solid black;">'
+            +'<tr><td colspan="3" style="text-align:left;border-style:none;vertical-align:bottom;">'
+            + '<span style="float:left;display:inline;text-align:left;">'
+            + 'Top: <a accesskey="t" href="javascript:org_html_manager.navigateTo(0);">'+index_name+'</a></span>'
+            + '<span style="float:right;display:inline;text-align:right;font-size:70%;">'
+            +  this.LINKS
+            + '<a accesskey="m" href="javascript:org_html_manager.toggleView('+i+');">toggle view</a></span>'
+            + '</td></tr><tr><td style="text-align:left;border-style:none;vertical-align:bottom;width:22%">';
 
       if(i>0)
         html += '<a accesskey="p" href="'+this.SECS[i-1].L
@@ -930,10 +999,10 @@
       if(i>0 && this.SECS[i].PARENT.PARENT) // != this.ROOT)
         html += '<a href="'+this.SECS[i].PARENT.L
         +'" title="Go to: '+this.removeTags(this.SECS[i].PARENT.HEADING.innerHTML)+'">'
-        +'<span style="font-variant:small-caps;font-style:italic;">'
+        +'<span class="org-info-js_parent-heading" style="font-variant:small-caps;font-style:italic;">'
         +this.SECS[i].PARENT.HEADING.innerHTML+'</span></a>';
       else
-        html += '<span style="font-variant:small-caps;font-style:italic;">'+this.SECS[i].HEADING.innerHTML+'</span>';
+        html += '<span class="org-info-js_parent-heading" style="font-variant:small-caps;font-style:italic;">'+this.SECS[i].HEADING.innerHTML+'</span>';
 
       // Right:
       html += '</td><td style="text-align:right;vertical-align:bottom;border-style:none;width:22%">';
@@ -1136,7 +1205,9 @@
       t.showSection(sec);
     if(t.POSTAMBLE) OrgNode.showElement(t.POSTAMBLE);
     if(t.NODE.IDX == 0) window.scrollTo(0, 0);
-    else t.NODE.DIV.scrollIntoView(true);
+      else t.NODE.DIV.scrollIntoView(true);
+      // call hook
+      OrgInfoAfterPlainViewFunction();
   },
 
   infoView: function (sec, skip_show_section)
@@ -1157,6 +1228,8 @@
     if(!skip_show_section)
       t.showSection(sec);
     window.scrollTo(0, 0);
+      // call hook
+      OrgInfoAfterInfoViewFunction();
   },
 
   slideView: function (sec, skip_show_section)
@@ -1259,7 +1332,21 @@
     t.NODE = t.SECS[section];
     OrgNode.showElement(t.NODE.BUTTONS);
   },
-
+    
+    unfoldAll: function ()
+    {
+        var t = this;
+        if(t.ROOT.DIRTY) {
+            t.ROOT.STATE = OrgNode.STATE_UNFOLDED;
+        }
+        for(var i=0;i<t.SECS.length;++i) {
+        t.SECS[i].STATE = OrgNode.STATE_FOLDED;
+        t.SECS[i].fold(false);
+        }
+        t.ROOT.STATE = OrgNode.STATE_UNFOLDED;
+        t.ROOT.DIRTY = false;    
+    },
+    
   toggleGlobaly: function ()
   {
     var t = this;
@@ -1321,7 +1408,7 @@
     var T = this;
     var i = T.NODE.IDX + 1;
     if(i<T.SECS.length) T.navigateTo(i);
-    else T.warn("Already last section.");
+    else T.warn("This is already the last section.");
   },
 
   previousSection: function()
@@ -1329,7 +1416,7 @@
     var t = this;
     var i = t.NODE.IDX;
     if(i>0) t.navigateTo(i-1);
-    else t.warn("Already first section.");
+    else t.warn("This is already the first section.");
   },
 
 
@@ -1345,6 +1432,8 @@
     if(t.VIEW == t.SLIDE_VIEW) t.adjustSlide(sec);
     t.pushHistory(sec, t.NODE.IDX);
     t.showSection(sec);
+      OrgInfoCurrentSectionNumber = sec;
+      OrgInfoAfterNavigateFunction();
   },
 
 
@@ -1386,7 +1475,7 @@
       else if(t.HFO && history.length) history.forward();
       else {
         t.HFO=1;
-        t.warn("History: No where to foreward go from here. Any key and `B' to move to next file in history.");
+        t.warn("History: There is nowhere to go forward to from here. Press `B' to move to the next page in your browser history.");
       }
     } else {
       if(t.HISTORY[t.HIST_INDEX - 1]) {
@@ -1406,7 +1495,7 @@
       else if(t.HBO && history.length) history.back();
       else {
         t.HBO=1;
-        t.warn("History: No where to back go from here. Any key and `b' to move to previous file in history.");
+        t.warn("History: Nowhere to go back to from here. Press `b' to move to the previous page in your browser history.");
       }
     }
   },
@@ -1549,18 +1638,23 @@
 
     if (1 == s.length)    // one char wide commands
       {
-        if ('b' == s) {
+        if ('z' == s) {
+            OrgInfoUserKeyZ();
+        }
+        else if ('k' == s) {
+            OrgInfoUserKeyK();
+        }
+        else if ('y' == s) {
+            OrgInfoUserKeyY();
+        }
+        else if ('b' == s) {
           t.popHistory();
         }
         else if ('B' == s) {
           t.popHistory(true);
         }
         else if ('c' == s) {
-          t.removeSearchHighlight();
-          if(t.VIEW == t.INFO_VIEW || t.VIEW == t.SLIDE_VIEW) {
-            // redisplay in info view mode:
-            t.showSection(t.NODE.IDX);
-          }
+            OrgInfoDoRemoveSearchHighlight(this);
         }
         else if ('i' == s) {
           if(! t.FIXED_TOC) {
@@ -1584,7 +1678,7 @@
           else if(t.NODE.IDX < t.SECS.length - 1) {
             t.navigateTo(t.NODE.IDX + 1);
           } else {
-            t.warn("Already last section.");
+            t.warn("This is already the last section.");
             return;                          // rely on what happends if messaging
           }
         }
@@ -1600,14 +1694,14 @@
               ++idx;
             }
           }
-          t.warn("No next sibling.");
+          t.warn("There is no next sibling.");
           return;                          // rely on what happends if messaging
         }
         else if ('p' == s) {
           if(t.NODE.IDX > 0) {
             t.navigateTo(t.NODE.IDX - 1);
           } else {
-            t.warn("Already first section.");
+            t.warn("This is already the first section.");
             return;                          // rely on what happends if messaging
           }
         }
@@ -1623,7 +1717,7 @@
               --idx;
             }
           }
-          t.warn("No previous sibling.");
+          t.warn("There is no previous sibling.");
         }
         else if ('q' == s) {
           if(window.confirm("Really close this file?")) {
@@ -1811,56 +1905,15 @@
     }
 
     else if(command == 's') { // search
-      if("" == result) return false;
-      if(t.SEARCH_HIGHLIGHT_ON) t.removeSearchHighlight();
-      var restore = t.OCCUR;
-      var plus = 0;
-      if(result == t.OCCUR) plus++;
-      t.OCCUR = result;
-      t.makeSearchRegexp();
-      for(var i = t.NODE.IDX + plus; i < t.SECS.length; ++i) {
-        if(t.searchTextInOrgNode(i)) {
-          t.OCCUR = result;
-          t.hideConsole();
-          t.navigateTo(t.SECS[i].IDX);
-          return;
-        }
-      }
-      t.warn("Search forwards: text not found.", false, t.OCCUR);
-      t.OCCUR = restore;
-      return;
+        OrgInfoDoSearch(this, result);
     }
 
     else if(command == 'S') { // repeat search
-      for(var i = t.NODE.IDX + 1; i < t.SECS.length; ++i) {
-        if(t.searchTextInOrgNode(i)) {
-          t.hideConsole();
-          t.navigateTo(t.SECS[i].IDX);
-          return;
-        }
-      }
-      t.warn("Search forwards: text not found.", false, t.OCCUR);
-      return;
+        OrgInfoDoRepeatSearch(this);
     }
 
     else if(command == 'r') { // search backwards
-      if("" == result) return false;
-      if(t.SEARCH_HIGHLIGHT_ON) t.removeSearchHighlight();
-      var restore = t.OCCUR;
-      t.OCCUR = result;
-      var plus = 0;
-      if(result == t.OCCUR) plus++;
-      t.makeSearchRegexp();
-      for(var i = t.NODE.IDX - plus; i > -1; --i) {
-        if(t.searchTextInOrgNode(i)) {
-          t.hideConsole();
-          t.navigateTo(t.SECS[i].IDX);
-          return;
-        }
-      }
-      t.warn("Search backwards: text not found.", false, t.OCCUR);
-      t.OCCUR = restore;
-      return;
+        OrgInfoDoSearchBackward(this, result);
     }
 
     else if(command == 'R') { // repeat search backwards
@@ -2004,7 +2057,13 @@
         t.SECS[i].HAS_HIGHLIGHT = true;
         t.SEARCH_HIGHLIGHT_ON = true;
       }
-      if(t.SEARCH_REGEX.test(t.SECS[i].FOLDER.innerHTML)) {
+
+        if (t.SECS[i].FOLDER == null)
+        {
+            ret = false;
+        }
+                
+        else if (t.SEARCH_REGEX.test(t.SECS[i].FOLDER.innerHTML)) {
         ret = true;
         t.setSearchHighlight(t.SECS[i].FOLDER);
         t.SECS[i].HAS_HIGHLIGHT = true;
@@ -2031,10 +2090,11 @@
           var tmp = t.SECS[i].HEADING.innerHTML;
           t.SECS[i].HEADING.innerHTML = tmp.replace(t.SEARCH_HL_REGEX, '$2');
         }
+          if (null != t.SECS[i].FOLDER) {
         while(t.SEARCH_HL_REGEX.test(t.SECS[i].FOLDER.innerHTML)) {
           var tmp = t.SECS[i].FOLDER.innerHTML;
           t.SECS[i].FOLDER.innerHTML = tmp.replace(t.SEARCH_HL_REGEX, '$2');
-        }
+        }}
         t.SECS[i].HAS_HIGHLIGHT = false;
       }
     }
@@ -2262,9 +2322,12 @@
 
 
 
+var OrgInfoDisableKeybindings = null;
 
 function OrgHtmlManagerKeyEvent (e)
 {
+    if (OrgInfoDisableKeybindings == true) return;
+    
   var c;
   if (!e) e = window.event;
   if (e.which) c = e.which;
@@ -2291,3 +2354,81 @@
 {
   org_html_manager.init();
 }
+
+
+
+function OrgInfoDoSearch (t, result)
+{
+    if("" == result) return false;
+    if(t.SEARCH_HIGHLIGHT_ON) t.removeSearchHighlight();
+    var restore = t.OCCUR;
+    var plus = 0;
+    if(result == t.OCCUR) plus++;
+    t.OCCUR = result;
+    t.makeSearchRegexp();
+    for(var i = t.NODE.IDX + plus; i < t.SECS.length; ++i) {
+        if(t.searchTextInOrgNode(i)) {
+            t.OCCUR = result;
+            t.hideConsole();
+            t.navigateTo(t.SECS[i].IDX);
+            return;
+        }
+    }
+    t.warn("Search forwards: text not found.", false, t.OCCUR);
+    t.OCCUR = restore;
+    return;
+}
+
+function OrgInfoDoRepeatSearch (t)
+{
+    for(var i = t.NODE.IDX + 1; i < t.SECS.length; ++i) {
+        if(t.searchTextInOrgNode(i)) {
+            t.hideConsole();
+            t.navigateTo(t.SECS[i].IDX);
+            return;
+        }
+    }
+    t.warn("Search forwards: text not found.", false, t.OCCUR);
+    return;
+}
+
+function OrgInfoRecoverSectionID(heading) {
+    var firstChar = heading[0];
+    if (firstChar >= '0' && firstChar <= '9') {
+        var strings = heading.split(' ');
+        var id = strings[0].replaceAll('.', '-');
+        var len = id.length;
+        var idf = id.slice(0, len-1);
+        return idf;
+    }
+    return null;
+}
+
+function OrgInfoDoSearchBackward(t, result) {
+    if("" == result) return false;
+    if(t.SEARCH_HIGHLIGHT_ON) t.removeSearchHighlight();
+    var restore = t.OCCUR;
+    t.OCCUR = result;
+    var plus = 0;
+    if(result == t.OCCUR) plus++;
+    t.makeSearchRegexp();
+    for(var i = t.NODE.IDX - plus; i > -1; --i) {
+        if(t.searchTextInOrgNode(i)) {
+            t.hideConsole();
+            t.navigateTo(t.SECS[i].IDX);
+            return;
+        }
+    }
+    t.warn("Search backwards: text not found.", false, t.OCCUR);
+    t.OCCUR = restore;
+    return;
+}
+
+function OrgInfoDoRemoveSearchHighlight(t) {
+    t.removeSearchHighlight();
+    if(t.VIEW == t.INFO_VIEW || t.VIEW == t.SLIDE_VIEW) {
+        // redisplay in info view mode:
+        t.showSection(t.NODE.IDX);
+    }
+}
+

Diff finished.  Sat Dec 24 10:18:46 2022