Find nearby comments and make them into tooltips

Marlin/configurator/css/configurator.css

 
 #serial_stepper { padding-top: 0.75em; display: block; float: left; }
 #SERIAL_PORT { display: none; }
+
+.tooltip { position: relative; }
+.tooltip::before {
+	content: attr(data-tooltip);
+	font-family: sans-serif;
+	font-size: 85%;
+	text-align: left;
+	position: absolute;
+	z-index: 999;
+	/*white-space:pre-wrap;*/
+	bottom: 9999px;
+	left: 110px;
+	color: #000;
+	padding: 8px;
+	line-height: 1.1;
+	max-width: 30em;
+	opacity: 0;
+	border-radius: 1em;
+	border: 2px solid #73d699;
+	background: #e2ff99; /* Old browsers */
+	background: -moz-linear-gradient(top,  #e2ff99 0%, #73d699 100%); /* FF3.6+ */
+	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#e2ff99), color-stop(100%,#73d699)); /* Chrome,Safari4+ */
+	background: -webkit-linear-gradient(top,  #e2ff99 0%,#73d699 100%); /* Chrome10+,Safari5.1+ */
+	background: -o-linear-gradient(top,  #e2ff99 0%,#73d699 100%); /* Opera 11.10+ */
+	background: -ms-linear-gradient(top,  #e2ff99 0%,#73d699 100%); /* IE10+ */
+	background: linear-gradient(to bottom,  #e2ff99 0%,#73d699 100%); /* W3C */
+	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#e2ff99', endColorstr='#73d699',GradientType=0 ); /* IE6-9 */
+	-webkit-box-shadow: 0px 6px 25px -4px rgba(0,0,0,0.75);
+	-moz-box-shadow: 0px 6px 25px -4px rgba(0,0,0,0.75);
+	box-shadow: 0px 6px 25px -4px rgba(0,0,0,0.75);
+	}
+.tooltip:hover::before {
+	opacity: 1;
+	bottom: 30px;
+	}
+.tooltip:hover::after {
+	content: "";
+	opacity: 1;
+	width: 0;
+	height: 0;
+	border-left: 8px solid transparent;
+	border-right: 8px solid transparent;
+	border-top: 8px solid #73d699;
+	z-index: 999;
+	position: absolute;
+	/*white-space: nowrap;*/
+	top: 2px;
+	left: 130px;
+	}

Marlin/configurator/js/configurator.js

 String.prototype.prePad = function(len, chr) { return len ? this.lpad(len, chr) : this; };
 String.prototype.zeroPad = function(len)     { return this.prePad(len, '0'); };
 String.prototype.regEsc = function()         { return this.replace(/[.?*+^$[\]\\(){}|-]/g, "\\$&"); }
-String.prototype.lineCount = function()      { return this.split(/\r?\n|\r/).length; };
+String.prototype.lineCount = function()      { var len = this.split(/\r?\n|\r/).length; return len > 0 ? len - 1 : len; };
 
 /**
  * selectField.addOptions takes an array or keyed object
       }
     },
 
+    /**
+     * Process a file after it's been successfully loaded
+     */
     fileLoaded: function(filename, txt) {
       this.log("fileLoaded:"+filename,4);
       switch(filename) {
         var name = $(this).attr('name');
         $(this).attr({id: name});
         // Attach its label sibling
-        var $label = $(this).prev();
-        if ($label[0].tagName == 'LABEL') {
-          $label.attr('for',name);
-        }
+        var $label = $(this).prev('label');
+        if ($label.length) $label.attr('for',name);
       });
 
       // Get all 'switchable' class items and add a checkbox
       });
     },
 
+    /**
+     * Update all fields on the form after loading a configuration
+     */
     refreshConfigForm: function() {
 
       /**
       this.initField('TEMP_RESIDENCY_TIME');
     },
 
-    setTextAndHighlight: function($field, txt, name) {
-      var $elm = $('#'+name), elm = $elm[0], inf = elm.defineInfo;
-      if (inf == null) return;
-    },
-
     /**
      * Make a field responsive and initialize its defineInfo
      */
       this.log("initField:"+name,4);
       var $elm = $('#'+name), elm = $elm[0];
       if (elm.defineInfo == null) {
-        elm.defineInfo = this.getDefineInfo(name, adv);
+        var inf = elm.defineInfo = this.getDefineInfo(name, adv);
         $elm.on($elm.attr('type') == 'text' ? 'input' : 'change', this.handleChange);
+        var comm = inf.comment;
+        var $tipme = $elm.prev('label');
+        if ($tipme.length) {
+          comm ?
+            $tipme.addClass('tooltip').attr('data-tooltip',comm) :
+            $tipme.removeClass('tooltip').removeAttr('data-tooltip');
+        }
       }
       this.setFieldFromDefine(name);
     },
     getDefineInfo: function(name, adv) {
       if (adv === undefined) adv = false;
       this.log('getDefineInfo:'+name,4);
-      var $elm = $('#'+name), elm = $elm[0];
-      var $c = adv ? $config_adv : $config;
+      var $elm = $('#'+name), elm = $elm[0],
+          $c = adv ? $config_adv : $config,
+          txt = $c.text();
 
       // a switch line with no value
-      var findDef = new RegExp('^(.*//)?(.*#define[ \\t]+' + elm.id + ')([ \\t]*/[*/].*)?$', 'm');
-      var result = findDef.exec($c.text());
-      var info = { type:0, adv:adv, field:$c[0], val_i: 2 };
+      var findDef = new RegExp('^([ \\t]*//)?([ \\t]*#define[ \\t]+' + elm.id + ')([ \\t]*/[*/].*)?$', 'm'),
+          result = findDef.exec(txt),
+          info = { type:0, adv:adv, field:$c[0], val_i: 2 };
       if (result !== null) {
         $.extend(info, {
           val_i:  1,
           define: result[2],
           post:   result[3] === undefined ? '' : result[3]
         });
-        info.regex = new RegExp('( *//)?( *' + info.define.regEsc() + info.post.regEsc() + ')', 'm');
-        info.repl =  new RegExp('( *)(\/\/)?( *' + info.define.regEsc() + info.post.regEsc() + ')', 'm');
+        info.regex = new RegExp('([ \\t]*//)?([ \\t]*' + info.define.regEsc() + info.post.regEsc() + ')', 'm');
+        info.repl =  new RegExp('([ \\t]*)(\/\/)?([ \\t]*' + info.define.regEsc() + info.post.regEsc() + ')', 'm');
       }
       else {
         // a define with quotes
         findDef = new RegExp('^(.*//)?(.*#define[ \\t]+' + elm.id + '[ \\t]+)("[^"]*")([ \\t]*/[*/].*)?$', 'm');
-        result = findDef.exec($c.text());
+        result = findDef.exec(txt);
         if (result !== null) {
           $.extend(info, {
             type:   'quoted',
             define: result[2],
             post:   result[4] === undefined ? '' : result[4]
           });
-          info.regex = new RegExp('( *//)? *' + info.define.regEsc() + '"([^"]*)"' + info.post.regEsc(), 'm');
-          info.repl  = new RegExp('(( *//)? *' + info.define.regEsc() + '")[^"]*("' + info.post.regEsc() + ')', 'm');
+          info.regex = new RegExp('([ \\t]*//)?[ \\t]*' + info.define.regEsc() + '"([^"]*)"' + info.post.regEsc(), 'm');
+          info.repl  = new RegExp('(([ \\t]*//)?[ \\t]*' + info.define.regEsc() + '")[^"]*("' + info.post.regEsc() + ')', 'm');
         }
         else {
           // a define with no quotes
-          findDef = new RegExp('^( *//)?( *#define[ \\t]+' + elm.id + '[ \\t]+)(\\S*)([ \\t]*/[*/].*)?$', 'm');
-          result = findDef.exec($c.text());
+          findDef = new RegExp('^([ \\t]*//)?([ \\t]*#define[ \\t]+' + elm.id + '[ \\t]+)(\\S*)([ \\t]*/[*/].*)?$', 'm');
+          result = findDef.exec(txt);
           if (result !== null) {
             $.extend(info, {
               type:   'plain',
               define: result[2],
               post:   result[4] === undefined ? '' : result[4]
             });
-            info.regex = new RegExp('( *//)? *' + info.define.regEsc() + '(\\S*)' + info.post.regEsc(), 'm');
-            info.repl  = new RegExp('(( *//)? *' + info.define.regEsc() + ')\\S*(' + info.post.regEsc() + ')', 'm');
+            info.regex = new RegExp('([ \\t]*//)?[ \\t]*' + info.define.regEsc() + '(\\S*)' + info.post.regEsc(), 'm');
+            info.repl  = new RegExp('(([ \\t]*//)?[ \\t]*' + info.define.regEsc() + ')\\S*(' + info.post.regEsc() + ')', 'm');
           }
         }
       }
 
       if (info.type) {
-        info.lineNum = this.getLineNumberOfText(info.line, $c.text());
-        this.log(info,2);
+        var comment = '';
+        // Get the end-of-line comment, if there is one
+        findDef = new RegExp('.*#define[ \\t].*/[/*]+[ \\t]*(.*)');
+        if (info.line.search(findDef) >= 0) {
+          comment = info.line.replace(findDef, '$1');
+        }
+        else {
+          // Get all the comments immediately before the item
+          var r, s;
+          findDef = new RegExp('([ \\t]*(//|#)[^\n]+\n){1,4}\\s{0,1}' + info.line, 'g');
+          if (r = findDef.exec(txt)) {
+            findDef = new RegExp('^[ \\t]*//+[ \\t]*(.*)[ \\t]*$', 'gm');
+            while((s = findDef.exec(r[0])) !== null) {
+              if (s[1].match(/\/\/[ \\t]*#define/) == null)
+                comment += s[1] + "\n";
+            }
+          }
+        }
+        $.extend(info, {
+          comment: comment.trim(),
+          lineNum: this.getLineNumberOfText(info.line, txt)
+        });
       }
       else
         info = null;
 
+      this.log(info,2);
+
       return info;
     },