Implemented option `history`

src/components/JSONNode.js

@@ -314,6 +314,7 @@ export default class JSONNode extends Component {
         : valueType(data.value)
   }
 
+  /** @private */
   handleChangeProperty = (event) => {
     const parentPath = this.props.parent.getPath()
     const oldProp = this.props.prop
@@ -324,6 +325,7 @@ export default class JSONNode extends Component {
     }
   }
 
+  /** @private */
   handleChangeValue = (event) => {
     const value = this.getValueFromEvent(event)
 
@@ -332,18 +334,21 @@ export default class JSONNode extends Component {
     }
   }
 
+  /** @private */
   handleClickValue = (event) => {
     if (event.ctrlKey && event.button === 0) { // Ctrl+Left click
       this.openLinkIfUrl(event)
     }
   }
 
+  /** @private */
   handleKeyDownValue = (event) => {
     if (event.ctrlKey && event.which === 13) { // Ctrl+Enter
       this.openLinkIfUrl(event)
     }
   }
 
+  /** @private */
   handleExpand = (event) => {
     const recurse = event.ctrlKey
     const expanded = !this.props.data.expanded
@@ -351,6 +356,7 @@ export default class JSONNode extends Component {
     this.props.events.onExpand(this.getPath(), expanded, recurse)
   }
 
+  /** @private */
   handleContextMenu = (event) => {
     event.stopPropagation()
 
@@ -373,6 +379,7 @@ export default class JSONNode extends Component {
     }
   }
 
+  /** @private */
   handleAppendContextMenu = (event) => {
     event.stopPropagation()
 
@@ -397,6 +404,7 @@ export default class JSONNode extends Component {
 
   /**
    * Singleton function to hide the currently visible context menu if any.
+   * @private
    */
   static hideActionMenu () {
     if (activeContextMenu) {
@@ -411,7 +419,7 @@ export default class JSONNode extends Component {
   /**
    * When this JSONNode holds an URL as value, open this URL in a new browser tab
    * @param event
-   * @private
+   * @protected
    */
   openLinkIfUrl (event) {
     const value = this.getValueFromEvent(event)
@@ -440,10 +448,6 @@ export default class JSONNode extends Component {
     return path
   }
 
-  isFieldEditable () {
-
-  }
-
   /**
    * Get the value of the target of an event, and convert it to it's type
    * @param event
@@ -463,7 +467,7 @@ export default class JSONNode extends Component {
    * @param event
    * @return {*}
    */
-  // TODO: cleanup
+  // TODO: make redundant and cleanup
   static findRootElement (event) {
     function isEditorElement (elem) {
       // FIXME: this is a bit tricky. can we use a special attribute or something?

src/components/TreeMode.js

@@ -84,7 +84,7 @@ export default class TreeMode extends Component {
       })
     ]
 
-    if (this.props.mode !== 'view') {
+    if (this.props.mode !== 'view' && this.props.options.history != false) {
       items = items.concat([
         h('div', {class: 'jsoneditor-vertical-menu-separator'}),
 
@@ -291,19 +291,27 @@ export default class TreeMode extends Component {
     const result = patchData(this.state.data, actions)
     const data = result.data
 
-    const historyItem = {
-      redo: actions,
-      undo: result.revert
-    }
-    const history = [historyItem]
-        .concat(this.state.history.slice(this.state.historyIndex))
-        .slice(0, MAX_HISTORY_ITEMS)
+    if (this.props.options.history != false) {
+      // update data and store history
+      const historyItem = {
+        redo: actions,
+        undo: result.revert
+      }
 
-    this.setState({
-      data,
-      history,
-      historyIndex: 0
-    })
+      const history = [historyItem]
+          .concat(this.state.history.slice(this.state.historyIndex))
+          .slice(0, MAX_HISTORY_ITEMS)
+
+      this.setState({
+        data,
+        history,
+        historyIndex: 0
+      })
+    }
+    else {
+      // update data and don't store history
+      this.setState({ data })
+    }
 
     return {
       patch: actions,

src/develop.html

@@ -61,7 +61,8 @@
     mode: mode,
     modes: ['text', 'code', 'tree', 'form', 'view'],
     indentation: 4,
-    escapeUnicode: true
+    escapeUnicode: true,
+    history: true
   }
   const editor = jsoneditor(container, options)
   const json = {