better back/forward navigation WIP

src/public/javascripts/widgets/history_navigation.js

@@ -1,6 +1,9 @@
 import BasicWidget from "./basic_widget.js";
 import utils from "../services/utils.js";
 import keyboardActionService from "../services/keyboard_actions.js";
+import contextMenu from "../services/context_menu.js";
+import treeService from "../services/tree.js";
+import appContext from "../services/app_context.js";
 
 const TPL = `
 <div class="history-navigation">
@@ -20,6 +23,26 @@ export default class HistoryNavigationWidget extends BasicWidget {
     doRender() {
         if (utils.isElectron()) {
             this.$widget = $(TPL);
+
+            this.$backInHistory = this.$widget.find("[data-trigger-command='backInNoteHistory']");
+            this.$backInHistory.on('contextmenu',  e => {
+                e.preventDefault();
+
+                if (this.webContents.history.length < 2) {
+                    return;
+                }
+
+                this.showContextMenu(e);
+            });
+
+
+            this.$forwardInHistory = this.$widget.find("[data-trigger-command='forwardInNoteHistory']");
+
+            const electron = require('electron');
+            this.webContents = electron.remote.getCurrentWindow().webContents;
+            this.webContents.clearHistory();
+
+            this.refresh();
         }
         else {
             this.$widget = $("<div>");
@@ -27,4 +50,50 @@ export default class HistoryNavigationWidget extends BasicWidget {
 
         return this.$widget;
     }
+
+    async showContextMenu(e) {
+        let items = [];
+
+        for (const url of this.webContents.history) {
+            const [_, notePathWithTab] = url.split('#');
+            const [notePath, tabId] = notePathWithTab.split('-');
+
+            const title = await treeService.getNotePathTitle(notePath);
+
+            items.push({
+                title,
+                notePath,
+                tabId,
+                uiIcon: "empty"
+            });
+        }
+
+        items.reverse();
+
+        items = items.slice(1); // remove the current note
+
+        if (items.length > 20) {
+            items = items.slice(0, 20);
+        }
+
+        contextMenu.show({
+            x: e.pageX,
+            y: e.pageY,
+            items,
+            selectMenuItemHandler: ({notePath, tabId}) => appContext.tabManager.switchToTab(tabId, notePath)
+        });
+    }
+
+    refresh() {
+        if (!utils.isElectron()) {
+            return;
+        }
+
+        this.$backInHistory.toggleClass('disabled', !this.webContents.canGoBack());
+        this.$forwardInHistory.toggleClass('disabled', !this.webContents.canGoForward());
+    }
+
+    activeNoteChangedEvent() {
+        this.refresh();
+    }
 }