Merge pull request #457 from meirotstein/path_and_count

Add selection count, cursor location and tree path

docs/api.md

@@ -180,6 +180,13 @@ Constructs a new JSONEditor.
      - Can return an object `{startFrom: number, options: string[]}`. Here `startFrom` determines the start character from where the existing text will be replaced. `startFrom` is `0` by default, replacing the whole text.
      - Can return a `Promise` resolving one of the return types above to support asynchronously retrieving a list with options.
 
+- `{boolean} navigationBar`
+
+  Adds navigation bar to the menu - the navigation bar visualize the current position on the tree structure as well as allows breadcrumbs navigation. True by default. Only applicable when `mode` is 'tree', 'form' or 'view'.
+
+- `{boolean} statusBar`
+
+  Adds status bar to the buttom of the editor - the status bar shows the cursor position (currently only for 'code' `mode`) and a count of the selected charcters. True by default. Only applicable when `mode` is 'code' or 'text'.
 
 ### Methods
 

gulpfile.js

@@ -131,7 +131,10 @@ gulp.task('bundle-css', ['mkdir'], function () {
     'src/css/contextmenu.css',
     'src/css/menu.css',
     'src/css/searchbox.css',
-    'src/css/autocomplete.css'
+    'src/css/autocomplete.css',
+    'src/css/treepath.css',
+    'src/css/statusbar.css',
+    'src/css/navigationbar.css'
   ])
       .pipe(concatCss(NAME + '.css'))
       .pipe(gulp.dest(DIST))

src/css/jsoneditor.css

@@ -210,6 +210,16 @@ div.jsoneditor-outer {
   box-sizing: border-box;
 }
 
+div.jsoneditor-outer.has-nav-bar {
+  margin: -61px 0 0 0;
+  padding: 61px 0 0 0;
+}
+
+div.jsoneditor-outer.has-status-bar {
+  margin: -35px 0 -16px 0;
+  padding: 35px 0 16px 0;
+}
+
 textarea.jsoneditor-text,
 .ace-jsoneditor {
   min-height: 150px;

src/css/navigationbar.css

@@ -0,0 +1,30 @@
+div.jsoneditor-navigation-bar {
+  width: 100%;
+  height: 26px;
+  padding: 2px;
+  margin: 0;
+  -moz-box-sizing: border-box;
+  -webkit-box-sizing: border-box;
+  box-sizing: border-box;
+  color: #808080;
+  background-color: #dcdcdc;
+}
+
+div.jsoneditor-navigation-bar:before {
+  content: '';
+  width: 100%;
+  height: 1px;
+  background-color: white;
+  opacity: 0.8;
+  position: absolute;
+  left: 0;
+  margin-top: -3px;
+}
+
+div.jsoneditor-navigation-bar.nav-bar-empty:after {
+  content: 'Select a node ...';
+  color: rgba(104, 104, 91, 0.56);
+  position: absolute;
+  margin-left: 6px;
+  margin-top: -1px;
+}

src/css/statusbar.css

@@ -0,0 +1,23 @@
+div.jsoneditor-statusbar {
+  line-height: 17px;
+  height: 17px;
+  color: #808080;
+  background-color: #dcdcdc;
+  margin-top: -17px;
+}
+
+div.jsoneditor-statusbar > .jsoneditor-curserinfo-label {
+  margin: 0 2px 0 4px;
+}
+
+div.jsoneditor-statusbar > .jsoneditor-curserinfo-val {
+  margin-right: 4px;
+}
+
+div.jsoneditor-statusbar > .jsoneditor-curserinfo-count {
+  margin-left: 4px;
+}
+
+div.jsoneditor-statusbar > span {
+  font-size: 12px;
+}

src/css/treepath.css

@@ -0,0 +1,27 @@
+
+div.jsoneditor-treepath {
+  padding: 3px 0 2px 5px;
+  overflow: hidden;
+}
+
+div.jsoneditor-treepath div.jsoneditor-contextmenu-root {
+  position: absolute;
+  left: 0;
+}
+
+div.jsoneditor-treepath span.jsoneditor-treepath-element{
+  margin: 1px;
+  font-family: arial, sans-serif;
+  font-size: 10pt;
+}
+
+div.jsoneditor-treepath span.jsoneditor-treepath-seperator {
+  margin: 2px;
+  font-size: 9pt;
+  font-family: arial, sans-serif;
+}
+
+div.jsoneditor-treepath span.jsoneditor-treepath-element:hover, div.jsoneditor-treepath span.jsoneditor-treepath-seperator:hover {
+  cursor:pointer;
+  text-decoration:underline;
+}

src/js/ContextMenu.js

@@ -211,8 +211,12 @@ ContextMenu.prototype.show = function (anchor, contentWindow) {
 
   // determine whether to display the menu below or above the anchor
   var showBelow = true;
+  var parent = anchor.parentNode;
+  var anchorRect = anchor.getBoundingClientRect();
+  var parentRect = parent.getBoundingClientRect()
+
   if (contentWindow) {
-    var anchorRect = anchor.getBoundingClientRect();
+    
     var contentRect = contentWindow.getBoundingClientRect();
 
     if (anchorRect.bottom + this.maxHeight < contentRect.bottom) {
@@ -227,18 +231,21 @@ ContextMenu.prototype.show = function (anchor, contentWindow) {
     }
   }
 
+  var leftGap = anchorRect.left - parentRect.left;
+  var topGap = anchorRect.top - parentRect.top;
+
   // position the menu
   if (showBelow) {
     // display the menu below the anchor
     var anchorHeight = anchor.offsetHeight;
-    this.dom.menu.style.left = '0px';
-    this.dom.menu.style.top = anchorHeight + 'px';
+    this.dom.menu.style.left = leftGap + 'px';
+    this.dom.menu.style.top = topGap + anchorHeight + 'px';
     this.dom.menu.style.bottom = '';
   }
   else {
     // display the menu above the anchor
-    this.dom.menu.style.left = '0px';
-    this.dom.menu.style.top = '';
+    this.dom.menu.style.left = leftGap + 'px';
+    this.dom.menu.style.top = topGap + 'px';
     this.dom.menu.style.bottom = '0px';
   }
 
@@ -246,7 +253,6 @@ ContextMenu.prototype.show = function (anchor, contentWindow) {
   this.rootNode = getRootNode(anchor);
 
   // attach the menu to the parent of the anchor
-  var parent = anchor.parentNode;
   parent.insertBefore(this.dom.root, parent.firstChild);
 
   // create and attach event listeners

src/js/JSONEditor.js

@@ -82,7 +82,8 @@ function JSONEditor (container, options, json) {
         'ajv', 'schema', 'schemaRefs','templates',
         'ace', 'theme','autocomplete',
         'onChange', 'onEditable', 'onError', 'onModeChange',
-        'escapeUnicode', 'history', 'search', 'mode', 'modes', 'name', 'indentation', 'sortObjectKeys'
+        'escapeUnicode', 'history', 'search', 'mode', 'modes', 'name', 'indentation', 
+        'sortObjectKeys', 'navigationBar', 'statusBar'
       ];
 
       Object.keys(options).forEach(function (option) {

src/js/Node.js

@@ -539,6 +539,20 @@ Node.prototype.hideChilds = function() {
 };
 
 
+/**
+ * Goes through the path from the node to the root and ensures that it is expanded
+ */
+Node.prototype.expandTo = function() {
+  var currentNode = this.parent;
+  while (currentNode) {
+    if (!currentNode.expanded) {
+      currentNode.expand();
+    }
+    currentNode = currentNode.parent;
+  }
+};
+
+
 /**
  * Add a new child to the node.
  * Only applicable when Node value is of type array or object

src/js/TreePath.js

@@ -0,0 +1,107 @@
+'use strict';
+
+var ContextMenu = require('./ContextMenu');
+
+/**
+ * Creates a component that visualize path selection in tree based editors
+ * @param {HTMLElement} container 
+ * @constructor
+ */
+function TreePath(container) {
+  if (container) {
+    this.path = document.createElement('div');
+    this.path.className = 'jsoneditor-treepath';
+    container.appendChild(this.path);
+    this.reset();
+  }
+};
+
+/**
+ * Reset component to initial status
+ */
+TreePath.prototype.reset = function () {
+  this.path.innerHTML = '';
+}
+
+/**
+ * Renders the component UI according to a given path objects
+ * @param {Array<name: String, childs: Array>} pathObjs a list of path objects
+ * 
+ */
+TreePath.prototype.setPath = function (pathObjs) {
+  var me = this;
+  this.reset();
+  if (pathObjs && pathObjs.length) {
+    pathObjs.forEach(function (pathObj, idx) {
+      var pathEl = document.createElement('span');
+      var sepEl;
+      pathEl.className = 'jsoneditor-treepath-element';
+      pathEl.innerText = pathObj.name;
+      pathEl.onclick = _onSegmentClick.bind(me, pathObj);
+  
+      me.path.appendChild(pathEl);
+
+      if (pathObj.children.length) {
+        sepEl = document.createElement('span');
+        sepEl.className = 'jsoneditor-treepath-seperator';
+        sepEl.innerHTML = '&#9658;';
+
+        sepEl.onclick = function () {
+          var items = [];
+          pathObj.children.forEach(function (child) {
+            items.push({
+              'text': child.name,
+              'className': 'jsoneditor-type-modes' + (pathObjs[idx + 1] + 1 && pathObjs[idx + 1].name === child.name ? ' jsoneditor-selected' : ''),
+              'click': _onContextMenuItemClick.bind(me, pathObj, child.name)
+            });
+          });
+          var menu = new ContextMenu(items);
+          menu.show(sepEl);
+        };
+
+        me.path.appendChild(sepEl, me.container);
+      }
+
+      if(idx === pathObjs.length - 1) {
+        var leftRectPos = (sepEl || pathEl).getBoundingClientRect().left;
+        if(me.path.offsetWidth < leftRectPos) {
+          me.path.scrollLeft = leftRectPos;
+        }
+      }
+    });
+  }
+
+  function _onSegmentClick(pathObj) {
+    if (this.selectionCallback) {
+      this.selectionCallback(pathObj);
+    }
+  };
+
+  function _onContextMenuItemClick(pathObj, selection) {
+    if (this.contextMenuCallback) {
+      this.contextMenuCallback(pathObj, selection);
+    }
+  };
+};
+
+/**
+ * set a callback function for selection of path section
+ * @param {Function} callback function to invoke when section is selected
+ */
+TreePath.prototype.onSectionSelected = function (callback) {
+  if (typeof callback === 'function') {
+    this.selectionCallback = callback;      
+  }
+};
+
+/**
+ * set a callback function for selection of path section
+ * @param {Function} callback function to invoke when section is selected
+ */
+TreePath.prototype.onContextMenuItemSelected = function (callback) {
+  if (typeof callback === 'function') {
+    this.contextMenuCallback = callback;
+  }
+};
+
+module.exports = TreePath;

src/js/textmode.js

@@ -36,6 +36,11 @@ var DEFAULT_THEME = 'ace/theme/jsoneditor';
 textmode.create = function (container, options) {
   // read options
   options = options || {};
+  
+  if(typeof options.statusBar === 'undefined') {
+    options.statusBar = true;
+  }
+
   this.options = options;
 
   // indentation
@@ -200,6 +205,7 @@ textmode.create = function (container, options) {
 
     // register onchange event
     aceEditor.on('change', this._onChange.bind(this));
+    aceEditor.on('changeSelection', this._onSelect.bind(this));
   }
   else {
     // load a plain text textarea
@@ -218,9 +224,66 @@ textmode.create = function (container, options) {
       // oninput is undefined. For IE8-
       this.textarea.onchange = this._onChange.bind(this);
     }
+
+    textarea.onselect = this._onSelect.bind(this);
+    textarea.onmousedown = this._onMouseDown.bind(this);
+    textarea.onblur = this._onBlur.bind(this);
   }
 
-  this.setSchema(this.options.schema, this.options.schemaRefs);
+  if (options.statusBar) {
+      
+      util.addClassName(this.content, 'has-status-bar');
+
+      this.curserInfoElements = {};      
+      var statusBar = document.createElement('div');
+      statusBar.className = 'jsoneditor-statusbar';
+      this.frame.appendChild(statusBar);
+
+      if (this.mode == 'code') {
+        var lnLabel = document.createElement('span');
+        lnLabel.className = 'jsoneditor-curserinfo-label';
+        lnLabel.innerText = 'Ln:';
+  
+        var lnVal = document.createElement('span');
+        lnVal.className = 'jsoneditor-curserinfo-val';
+        lnVal.innerText = 0;
+  
+        statusBar.appendChild(lnLabel);
+        statusBar.appendChild(lnVal);
+  
+        var colLabel = document.createElement('span');
+        colLabel.className = 'jsoneditor-curserinfo-label';
+        colLabel.innerText = 'Col:';
+  
+        var colVal = document.createElement('span');
+        colVal.className = 'jsoneditor-curserinfo-val';
+        colVal.innerText = 0;
+  
+        statusBar.appendChild(colLabel);
+        statusBar.appendChild(colVal);
+  
+        this.curserInfoElements.colVal = colVal;
+        this.curserInfoElements.lnVal = lnVal;
+      } 
+    
+      var countLabel = document.createElement('span');
+      countLabel.className = 'jsoneditor-curserinfo-label';
+      countLabel.innerText = 'selected';
+      countLabel.style.display = 'none';
+
+      var countVal = document.createElement('span');
+      countVal.className = 'jsoneditor-curserinfo-count';
+      countVal.innerText = 0;
+      countVal.style.display = 'none';
+
+      this.curserInfoElements.countLabel = countLabel;
+      this.curserInfoElements.countVal = countVal;
+
+      statusBar.appendChild(countVal);
+      statusBar.appendChild(countLabel);    
+  }
+
+  this.setSchema(this.options.schema, this.options.schemaRefs);  
 };
 
 /**
@@ -244,6 +307,28 @@ textmode._onChange = function () {
   }
 };
 
+/**
+ * Handle text selection
+ * Calculates the cursor position and selection range and updates menu
+ * @private
+ */
+textmode._onSelect = function () {
+  if(this.options.statusBar) {
+    if (this.textarea) {
+      var selectionRange = util.getInputSelection(this.textarea);
+      if (selectionRange.start !== selectionRange.end) {
+        this._setSelectionCountDisplay(Math.abs(selectionRange.end - selectionRange.start));
+      }
+    } else if (this.aceEditor) {
+      var curserPos = this.aceEditor.getCursorPosition();
+      var selectedText = this.aceEditor.getSelectedText();
+      this.curserInfoElements.lnVal.innerText = curserPos.row + 1;
+      this.curserInfoElements.colVal.innerText = curserPos.column + 1;
+      this._setSelectionCountDisplay(selectedText.length);
+    }
+  }
+};
+
 /**
  * Event handler for keydown. Handles shortcut keys
  * @param {Event} event
@@ -269,6 +354,39 @@ textmode._onKeyDown = function (event) {
     event.preventDefault();
     event.stopPropagation();
   }
+
+  this._setSelectionCountDisplay();
+};
+
+/**
+ * Event handler for mousedown.
+ * @param {Event} event
+ * @private
+ */
+textmode._onMouseDown = function (event) {
+  this._setSelectionCountDisplay();
+};
+
+/**
+ * Event handler for blur.
+ * @param {Event} event
+ * @private
+ */
+textmode._onBlur = function (event) {
+  this._setSelectionCountDisplay();
+};
+
+textmode._setSelectionCountDisplay = function (value) {
+  if (this.options.statusBar) {
+    if (value && this.curserInfoElements.countVal) {
+      this.curserInfoElements.countVal.innerText = value;
+      this.curserInfoElements.countVal.style.display = 'inline';
+      this.curserInfoElements.countLabel.style.display = 'inline';
+    } else {
+      this.curserInfoElements.countVal.style.display = 'none';
+      this.curserInfoElements.countLabel.style.display = 'none';
+    }
+  }
 };
 
 /**
@@ -405,7 +523,6 @@ textmode.setText = function(jsonText) {
 
     this.options.onChange = originalOnChange;
   }
-
   // validate JSON schema
   this.validate();
 };
@@ -445,7 +562,7 @@ textmode.validate = function () {
     }
   }
 
-  if (errors.length > 0) {
+  if (errors.length > 0) {  
     // limit the number of displayed errors
     var limit = errors.length > MAX_ERRORS;
     if (limit) {

src/js/treemode.js

@@ -5,6 +5,7 @@ var Highlighter = require('./Highlighter');
 var History = require('./History');
 var SearchBox = require('./SearchBox');
 var ContextMenu = require('./ContextMenu');
+var TreePath = require('./TreePath');
 var Node = require('./Node');
 var ModeSwitcher = require('./ModeSwitcher');
 var util = require('./util');
@@ -113,7 +114,8 @@ treemode._setOptions = function (options) {
     name: undefined,   // field name of root node
     schema: null,
     schemaRefs: null,
-    autocomplete: null
+    autocomplete: null,
+    navigationBar : true
   };
 
   // copy all options
@@ -757,6 +759,17 @@ treemode._createFrame = function () {
   if (this.options.search) {
     this.searchBox = new SearchBox(this, this.menu);
   }
+
+  if(this.options.navigationBar) {
+    // create second menu row for treepath
+    this.navBar = document.createElement('div');
+    this.navBar.className = 'jsoneditor-navigation-bar nav-bar-empty';
+    this.frame.appendChild(this.navBar);
+
+    this.treePath = new TreePath(this.navBar);
+    this.treePath.onSectionSelected(this._onTreePathSectionSelected.bind(this));
+    this.treePath.onContextMenuItemSelected(this._onTreePathMenuItemSelected.bind(this));
+  }
 };
 
 /**
@@ -810,6 +823,10 @@ treemode._onEvent = function (event) {
 
   var node = Node.getNodeFromTarget(event.target);
 
+  if (this.options && this.options.navigationBar && node && (event.type == 'keydown' || event.type == 'mousedown')) {
+    this._updateTreePath(node.getNodePath());
+  }
+
   if (node && node.selected) {
     if (event.type == 'click') {
       if (event.target == node.dom.menu) {
@@ -850,6 +867,73 @@ treemode._onEvent = function (event) {
   }
 };
 
+/**
+ * Update TreePath components
+ * @param {Array<Node>} pathNodes list of nodes in path from root to selection 
+ * @private
+ */
+treemode._updateTreePath = function (pathNodes) {
+  if (pathNodes && pathNodes.length) {
+    util.removeClassName(this.navBar, 'nav-bar-empty');
+    
+    var pathObjs = [];
+    pathNodes.forEach(function (node) {
+      var pathObj = {
+        name: getName(node),
+        node: node,
+        children: []
+      }
+      if (node.childs && node.childs.length) {
+        node.childs.forEach(function (childNode) {
+          pathObj.children.push({
+            name: getName(childNode),
+            node: childNode
+          });
+        });
+      }
+      pathObjs.push(pathObj);
+    });
+    this.treePath.setPath(pathObjs);
+  } else {
+    util.addClassName(this.navBar, 'nav-bar-empty');
+  }
+
+  function getName(node) {
+    return node.field || (isNaN(node.index) ? node.type : node.index);
+  }
+};
+
+/**
+ * Callback for tree path section selection - focus the selected node in the tree
+ * @param {Object} pathObj path object that was represents the selected section node
+ * @private
+ */
+treemode._onTreePathSectionSelected = function (pathObj) {
+  if(pathObj && pathObj.node) {
+    pathObj.node.expandTo();
+    pathObj.node.focus();
+  }
+};
+
+/**
+ * Callback for tree path menu item selection - rebuild the path accrding to the new selection and focus the selected node in the tree
+ * @param {Object} pathObj path object that was represents the parent section node
+ * @param {String} selection selected section child
+ * @private
+ */
+treemode._onTreePathMenuItemSelected = function (pathObj, selection) {
+  if(pathObj && pathObj.children.length) {
+    var selectionObj = pathObj.children.find(function (obj) {
+      return obj.name === selection;
+    });
+    if(selectionObj && selectionObj.node) {
+      this._updateTreePath(selectionObj.node.getNodePath());
+      selectionObj.node.expandTo();
+      selectionObj.node.focus();
+    }
+  }
+};
+
 treemode._startDragDistance = function (event) {
   this.dragDistanceEvent = {
     initialTarget: event.target,
@@ -1162,6 +1246,9 @@ treemode._onKeyDown = function (event) {
 treemode._createTable = function () {
   var contentOuter = document.createElement('div');
   contentOuter.className = 'jsoneditor-outer';
+  if(this.options.navigationBar) {
+    util.addClassName(contentOuter, 'has-nav-bar');
+  }
   this.contentOuter = contentOuter;
 
   this.content = document.createElement('div');

src/js/util.js

@@ -790,6 +790,60 @@ exports.textDiff = function textDiff(oldText, newText) {
   return {start: start, end: newEnd};
 };
 
+
+/**
+ * Return an object with the selection range or cursor position (if both have the same value)
+ * Support also old browsers (IE8-)
+ * Source: http://ourcodeworld.com/articles/read/282/how-to-get-the-current-cursor-position-and-selection-within-a-text-input-or-textarea-in-javascript
+ * @param {DOMElement} el A dom element of a textarea or input text.
+ * @return {Object} reference Object with 2 properties (start and end) with the identifier of the location of the cursor and selected text.
+ **/
+exports.getInputSelection = function(el) {
+  var start = 0, end = 0, normalizedValue, range, textInputRange, len, endRange;
+
+  if (typeof el.selectionStart == "number" && typeof el.selectionEnd == "number") {
+      start = el.selectionStart;
+      end = el.selectionEnd;
+  } else {
+      range = document.selection.createRange();
+
+      if (range && range.parentElement() == el) {
+          len = el.value.length;
+          normalizedValue = el.value.replace(/\r\n/g, "\n");
+
+          // Create a working TextRange that lives only in the input
+          textInputRange = el.createTextRange();
+          textInputRange.moveToBookmark(range.getBookmark());
+
+          // Check if the start and end of the selection are at the very end
+          // of the input, since moveStart/moveEnd doesn't return what we want
+          // in those cases
+          endRange = el.createTextRange();
+          endRange.collapse(false);
+
+          if (textInputRange.compareEndPoints("StartToEnd", endRange) > -1) {
+              start = end = len;
+          } else {
+              start = -textInputRange.moveStart("character", -len);
+              start += normalizedValue.slice(0, start).split("\n").length - 1;
+
+              if (textInputRange.compareEndPoints("EndToEnd", endRange) > -1) {
+                  end = len;
+              } else {
+                  end = -textInputRange.moveEnd("character", -len);
+                  end += normalizedValue.slice(0, end).split("\n").length - 1;
+              }
+          }
+      }
+  }
+
+  return {
+      start: start,
+      end: end
+  };
+}
+
+
 if (typeof Element !== 'undefined') {
   // Polyfill for array remove
   (function (arr) {
@@ -817,4 +871,16 @@ if (!String.prototype.startsWith) {
         position = position || 0;
         return this.substr(position, searchString.length) === searchString;
     };
+}
+
+// Polyfill for Array.find
+if (!Array.prototype.find) {
+  Array.prototype.find = function(callback) {    
+    for (var i = 0; i < this.length; i++) {
+      var element = this[i];
+      if ( callback.call(this, element, i, this) ) {
+        return element;
+      }
+    }
+  }
 }