From b12e38c231dad8b6abb9317b3cb27b3384422b4e Mon Sep 17 00:00:00 2001
From: zadam <zadam.apps@gmail.com>
Date: Sun, 12 Jan 2020 10:35:33 +0100
Subject: [PATCH] widgetizing tree WIP

---
 src/public/javascripts/desktop.js             |   1 -
 src/public/javascripts/mobile.js              |   1 -
 src/public/javascripts/services/branches.js   |  37 ++-
 .../javascripts/services/drag_and_drop.js     |  75 -----
 src/public/javascripts/services/tree.js       |   4 -
 .../javascripts/services/tree_context_menu.js |  16 +-
 .../javascripts/services/tree_keybindings.js  | 303 ++++++++++--------
 src/public/javascripts/widgets/note_tree.js   |  89 ++++-
 8 files changed, 284 insertions(+), 242 deletions(-)
 delete mode 100644 src/public/javascripts/services/drag_and_drop.js

diff --git a/src/public/javascripts/desktop.js b/src/public/javascripts/desktop.js
index 8b1ead908..2ece01974 100644
--- a/src/public/javascripts/desktop.js
+++ b/src/public/javascripts/desktop.js
@@ -1,6 +1,5 @@
 import cloning from './services/cloning.js';
 import contextMenu from './services/tree_context_menu.js';
-import dragAndDropSetup from './services/drag_and_drop.js';
 import link from './services/link.js';
 import ws from './services/ws.js';
 import noteDetailService from './services/note_detail.js';
diff --git a/src/public/javascripts/mobile.js b/src/public/javascripts/mobile.js
index 13d71b50d..2d55e7fec 100644
--- a/src/public/javascripts/mobile.js
+++ b/src/public/javascripts/mobile.js
@@ -1,6 +1,5 @@
 import treeService from "./services/tree.js";
 import noteDetailService from "./services/note_detail.js";
-import dragAndDropSetup from "./services/drag_and_drop.js";
 import treeCache from "./services/tree_cache.js";
 import treeBuilder from "./services/tree_builder.js";
 import contextMenuWidget from "./services/context_menu.js";
diff --git a/src/public/javascripts/services/branches.js b/src/public/javascripts/services/branches.js
index c20338321..89682ed14 100644
--- a/src/public/javascripts/services/branches.js
+++ b/src/public/javascripts/services/branches.js
@@ -68,6 +68,7 @@ async function moveToNode(branchIdsToMove, newParentNoteId) {
     }
 }
 
+// FIXME used for finding a next note to activate after a delete
 async function getNextNode(nodes) {
     // following code assumes that nodes contain only top-most selected nodes - getSelectedNodes has been
     // called with stopOnParent=true
@@ -84,10 +85,10 @@ async function getNextNode(nodes) {
     return treeUtils.getNotePath(next);
 }
 
-async function deleteNodes(nodes) {
-    nodes = await filterRootNote(nodes);
+async function deleteNodes(branchIdsToDelete) {
+    branchIdsToDelete = await filterRootNote(branchIdsToDelete);
 
-    if (nodes.length === 0) {
+    if (branchIdsToDelete.length === 0) {
         return false;
     }
 
@@ -96,7 +97,15 @@ async function deleteNodes(nodes) {
         .append($('<label for="delete-clones-checkbox">')
                     .text("delete also all note clones")
                     .attr("title", "all clones of selected notes will be deleted and as such the whole note will be deleted."));
-    const $nodeTitles = $("<ul>").append(...nodes.map(node => $("<li>").text(node.title)));
+
+    const $nodeTitles = $("<ul>");
+
+    for (const branchId of branchIdsToDelete) {
+        const note = await treeCache.getBranch(branchId).getNote();
+
+        $nodeTitles.append($("<li>").text(note.title));
+    }
+
     const $confirmText = $("<div>")
         .append($("<p>").text('This will delete the following notes and their sub-notes: '))
         .append($nodeTitles)
@@ -114,31 +123,31 @@ async function deleteNodes(nodes) {
 
     let counter = 0;
 
-    for (const node of nodes) {
+    for (const branchIdToDelete of branchIdsToDelete) {
         counter++;
 
-        const last = counter === nodes.length;
+        const last = counter === branchIdsToDelete.length;
         const query = `?taskId=${taskId}&last=${last ? 'true' : 'false'}`;
 
-        if (deleteClones) {
-            await server.remove(`notes/${node.data.noteId}` + query);
+        const branch = treeCache.getBranch(branchIdToDelete);
 
-            noteDetailService.noteDeleted(node.data.noteId);
+        if (deleteClones) {
+            await server.remove(`notes/${branch.noteId}` + query);
+
+            noteDetailService.noteDeleted(branch.noteId);
         }
         else {
-            const {noteDeleted} = await server.remove(`branches/${node.data.branchId}` + query);
+            const {noteDeleted} = await server.remove(`branches/${branchIdToDelete}` + query);
 
             if (noteDeleted) {
-                noteDetailService.noteDeleted(node.data.noteId);
+                noteDetailService.noteDeleted(branch.noteId);
             }
         }
     }
 
-    const nextNotePath = await getNextNode(nodes);
-
     const noteIds = Array.from(new Set(nodes.map(node => node.getParent().data.noteId)));
 
-    await treeService.reloadNotes(noteIds, nextNotePath);
+    await treeService.reloadNotes(noteIds);
 
     return true;
 }
diff --git a/src/public/javascripts/services/drag_and_drop.js b/src/public/javascripts/services/drag_and_drop.js
deleted file mode 100644
index 0b2025e8f..000000000
--- a/src/public/javascripts/services/drag_and_drop.js
+++ /dev/null
@@ -1,75 +0,0 @@
-import treeService from './tree.js';
-import treeChangesService from './branches.js';
-import hoistedNoteService from './hoisted_note.js';
-
-const dragAndDropSetup = {
-    autoExpandMS: 600,
-    dragStart: (node, data) => {
-        // don't allow dragging root node
-        if (node.data.noteId === hoistedNoteService.getHoistedNoteNoPromise()
-            || node.getParent().data.noteType === 'search') {
-            return false;
-        }
-
-        node.setSelected(true);
-
-        const notes = treeService.getSelectedNodes().map(node => { return {
-            noteId: node.data.noteId,
-            title: node.title
-        }});
-
-        data.dataTransfer.setData("text", JSON.stringify(notes));
-
-        // This function MUST be defined to enable dragging for the tree.
-        // Return false to cancel dragging of node.
-        return true;
-    },
-    dragEnter: (node, data) => true, // allow drop on any node
-    dragOver: (node, data) => true,
-    dragDrop: async (node, data) => {
-        if ((data.hitMode === 'over' && node.data.noteType === 'search') ||
-            (['after', 'before'].includes(data.hitMode)
-                && (node.data.noteId === hoistedNoteService.getHoistedNoteNoPromise() || node.getParent().data.noteType === 'search'))) {
-
-            const infoDialog = await import('../dialogs/info.js');
-
-            await infoDialog.info("Dropping notes into this location is not allowed.");
-
-            return;
-        }
-
-        const dataTransfer = data.dataTransfer;
-
-        if (dataTransfer && dataTransfer.files && dataTransfer.files.length > 0) {
-            const files = [...dataTransfer.files]; // chrome has issue that dataTransfer.files empties after async operation
-
-            const importService = await import('./import.js');
-
-            importService.uploadFiles(node.data.noteId, files, {
-                safeImport: true,
-                shrinkImages: true,
-                textImportedAsText: true,
-                codeImportedAsCode: true,
-                explodeArchives: true
-            });
-        }
-        else {
-            // This function MUST be defined to enable dropping of items on the tree.
-            // data.hitMode is 'before', 'after', or 'over'.
-
-            const selectedNodes = treeService.getSelectedNodes();
-
-            if (data.hitMode === "before") {
-                treeChangesService.moveBeforeNode(selectedNodes, node);
-            } else if (data.hitMode === "after") {
-                treeChangesService.moveAfterNode(selectedNodes, node);
-            } else if (data.hitMode === "over") {
-                treeChangesService.moveToNode(selectedNodes, node);
-            } else {
-                throw new Error("Unknown hitMode=" + data.hitMode);
-            }
-        }
-    }
-};
-
-export default dragAndDropSetup;
\ No newline at end of file
diff --git a/src/public/javascripts/services/tree.js b/src/public/javascripts/services/tree.js
index 1a2fd5ddc..25a9588e3 100644
--- a/src/public/javascripts/services/tree.js
+++ b/src/public/javascripts/services/tree.js
@@ -1,5 +1,3 @@
-import contextMenuWidget from './context_menu.js';
-import dragAndDropSetup from './drag_and_drop.js';
 import ws from './ws.js';
 import noteDetailService from './note_detail.js';
 import protectedSessionHolder from './protected_session_holder.js';
@@ -9,10 +7,8 @@ import server from './server.js';
 import treeCache from './tree_cache.js';
 import toastService from "./toast.js";
 import treeBuilder from "./tree_builder.js";
-import treeKeyBindingService from "./tree_keybindings.js";
 import hoistedNoteService from '../services/hoisted_note.js';
 import optionsService from "../services/options.js";
-import TreeContextMenu from "./tree_context_menu.js";
 import bundle from "./bundle.js";
 import keyboardActionService from "./keyboard_actions.js";
 
diff --git a/src/public/javascripts/services/tree_context_menu.js b/src/public/javascripts/services/tree_context_menu.js
index 17b65618f..f4b73f018 100644
--- a/src/public/javascripts/services/tree_context_menu.js
+++ b/src/public/javascripts/services/tree_context_menu.js
@@ -133,7 +133,7 @@ class TreeContextMenu {
             protectedSessionService.protectSubtree(this.node.data.noteId, false);
         }
         else if (cmd === "copy") {
-            clipboard.copy(this.treeWidget.getSelectedOrActiveNodes(this.node));
+            clipboard.copy(this.getSelectedOrActiveBranchIds());
         }
         else if (cmd === "cloneTo") {
             const nodes = this.treeWidget.getSelectedOrActiveNodes(this.node);
@@ -142,7 +142,7 @@ class TreeContextMenu {
             import("../dialogs/clone_to.js").then(d => d.showDialog(noteIds));
         }
         else if (cmd === "cut") {
-            clipboard.cut(this.treeWidget.getSelectedOrActiveNodes(this.node));
+            clipboard.cut(this.getSelectedOrActiveBranchIds());
         }
         else if (cmd === "moveTo") {
             const nodes = this.treeWidget.getSelectedOrActiveNodes(this.node);
@@ -150,13 +150,13 @@ class TreeContextMenu {
             import("../dialogs/move_to.js").then(d => d.showDialog(nodes));
         }
         else if (cmd === "pasteAfter") {
-            clipboard.pasteAfter(this.treeWidget, this.node);
+            clipboard.pasteAfter(this.node.data.branchId);
         }
         else if (cmd === "pasteInto") {
-            clipboard.pasteInto(this.node);
+            clipboard.pasteInto(this.node.data.noteId);
         }
         else if (cmd === "delete") {
-            treeChangesService.deleteNodes(this.treeWidget.getSelectedOrActiveNodes(this.node));
+            treeChangesService.deleteNodes(this.getSelectedOrActiveBranchIds());
         }
         else if (cmd === "export") {
             const exportDialog = await import('../dialogs/export.js');
@@ -193,6 +193,12 @@ class TreeContextMenu {
             ws.logError("Unknown command: " + cmd);
         }
     }
+
+    getSelectedOrActiveBranchIds() {
+        const nodes = this.treeWidget.getSelectedOrActiveNodes(this.node);
+
+        return nodes.map(node => node.data.branchId);
+    }
 }
 
 export default TreeContextMenu;
\ No newline at end of file
diff --git a/src/public/javascripts/services/tree_keybindings.js b/src/public/javascripts/services/tree_keybindings.js
index 43e8e6d12..45374c37a 100644
--- a/src/public/javascripts/services/tree_keybindings.js
+++ b/src/public/javascripts/services/tree_keybindings.js
@@ -6,161 +6,186 @@ import clipboard from "./clipboard.js";
 import utils from "./utils.js";
 import keyboardActionService from "./keyboard_actions.js";
 
-const fixedKeyBindings = {
-    // code below shouldn't be necessary normally, however there's some problem with interaction with context menu plugin
-    // after opening context menu, standard shortcuts don't work, but they are detected here
-    // so we essentially takeover the standard handling with our implementation.
-    "left": node => {
-        node.navigate($.ui.keyCode.LEFT, true).then(treeService.clearSelectedNodes);
+/**
+ * @param {NoteTreeWidget} treeWidget
+ */
+function getFixedKeyBindings(treeWidget) {
+    return {
+        // code below shouldn't be necessary normally, however there's some problem with interaction with context menu plugin
+        // after opening context menu, standard shortcuts don't work, but they are detected here
+        // so we essentially takeover the standard handling with our implementation.
+        "left": node => {
+            node.navigate($.ui.keyCode.LEFT, true).then(treeWidget.clearSelectedNodes);
 
-        return false;
-    },
-    "right": node => {
-        node.navigate($.ui.keyCode.RIGHT, true).then(treeService.clearSelectedNodes);
+            return false;
+        },
+        "right": node => {
+            node.navigate($.ui.keyCode.RIGHT, true).then(treeWidget.clearSelectedNodes);
 
-        return false;
-    },
-    "up": node => {
-        node.navigate($.ui.keyCode.UP, true).then(treeService.clearSelectedNodes);
+            return false;
+        },
+        "up": node => {
+            node.navigate($.ui.keyCode.UP, true).then(treeWidget.clearSelectedNodes);
 
-        return false;
-    },
-    "down": node => {
-        node.navigate($.ui.keyCode.DOWN, true).then(treeService.clearSelectedNodes);
+            return false;
+        },
+        "down": node => {
+            node.navigate($.ui.keyCode.DOWN, true).then(treeWidget.clearSelectedNodes);
 
-        return false;
-    }
-};
-
-const templates = {
-    "DeleteNotes": node => {
-        treeChangesService.deleteNodes(treeService.getSelectedOrActiveNodes(node));
-    },
-    "MoveNoteUp": node => {
-        const beforeNode = node.getPrevSibling();
-
-        if (beforeNode !== null) {
-            treeChangesService.moveBeforeNode([node], beforeNode);
+            return false;
         }
+    };
+}
 
-        return false;
-    },
-    "MoveNoteDown": node => {
-        const afterNode = node.getNextSibling();
-        if (afterNode !== null) {
-            treeChangesService.moveAfterNode([node], afterNode);
-        }
+/**
+ * @param {NoteTreeWidget} treeWidget
+ * @param {FancytreeNode} node
+ */
+function getSelectedOrActiveBranchIds(treeWidget, node) {
+    const nodes = treeWidget.getSelectedOrActiveNodes(node);
 
-        return false;
-    },
-    "MoveNoteUpInHierarchy": node => {
-        treeChangesService.moveNodeUpInHierarchy(node);
+    return nodes.map(node => node.data.branchId);
+}
 
-        return false;
-    },
-    "MoveNoteDownInHierarchy": node => {
-        const toNode = node.getPrevSibling();
+/**
+ * @param {NoteTreeWidget} treeWidget
+ */
+function getTemplates(treeWidget) {
+    return {
+        "DeleteNotes": node => {
+            treeChangesService.deleteNodes(getSelectedOrActiveBranchIds(treeWidget, node));
+        },
+        "MoveNoteUp": node => {
+            const beforeNode = node.getPrevSibling();
 
-        if (toNode !== null) {
-            treeChangesService.moveToNode([node], toNode);
-        }
-
-        return false;
-    },
-    "AddNoteAboveToSelection": () => {
-        const node = treeService.getFocusedNode();
-
-        if (!node) {
-            return;
-        }
-
-        if (node.isActive()) {
-            node.setSelected(true);
-        }
-
-        const prevSibling = node.getPrevSibling();
-
-        if (prevSibling) {
-            prevSibling.setActive(true, {noEvents: true});
-
-            if (prevSibling.isSelected()) {
-                node.setSelected(false);
+            if (beforeNode !== null) {
+                treeChangesService.moveBeforeNode([node], beforeNode);
             }
 
-            prevSibling.setSelected(true);
-        }
-
-        return false;
-    },
-    "AddNoteBelowToSelection": () => {
-        const node = treeService.getFocusedNode();
-
-        if (!node) {
-            return;
-        }
-
-        if (node.isActive()) {
-            node.setSelected(true);
-        }
-
-        const nextSibling = node.getNextSibling();
-
-        if (nextSibling) {
-            nextSibling.setActive(true, {noEvents: true});
-
-            if (nextSibling.isSelected()) {
-                node.setSelected(false);
+            return false;
+        },
+        "MoveNoteDown": node => {
+            const afterNode = node.getNextSibling();
+            if (afterNode !== null) {
+                treeChangesService.moveAfterNode([node], afterNode);
             }
 
-            nextSibling.setSelected(true);
+            return false;
+        },
+        "MoveNoteUpInHierarchy": node => {
+            treeChangesService.moveNodeUpInHierarchy(node);
+
+            return false;
+        },
+        "MoveNoteDownInHierarchy": node => {
+            const toNode = node.getPrevSibling();
+
+            if (toNode !== null) {
+                treeChangesService.moveToNode([node], toNode);
+            }
+
+            return false;
+        },
+        "AddNoteAboveToSelection": () => {
+            const node = treeService.getFocusedNode();
+
+            if (!node) {
+                return;
+            }
+
+            if (node.isActive()) {
+                node.setSelected(true);
+            }
+
+            const prevSibling = node.getPrevSibling();
+
+            if (prevSibling) {
+                prevSibling.setActive(true, {noEvents: true});
+
+                if (prevSibling.isSelected()) {
+                    node.setSelected(false);
+                }
+
+                prevSibling.setSelected(true);
+            }
+
+            return false;
+        },
+        "AddNoteBelowToSelection": () => {
+            const node = treeWidget.getFocusedNode();
+
+            if (!node) {
+                return;
+            }
+
+            if (node.isActive()) {
+                node.setSelected(true);
+            }
+
+            const nextSibling = node.getNextSibling();
+
+            if (nextSibling) {
+                nextSibling.setActive(true, {noEvents: true});
+
+                if (nextSibling.isSelected()) {
+                    node.setSelected(false);
+                }
+
+                nextSibling.setSelected(true);
+            }
+
+            return false;
+        },
+        "CollapseSubtree": node => {
+            treeWidget.collapseTree(node);
+        },
+        "SortChildNotes": node => {
+            treeService.sortAlphabetically(node.data.noteId);
+
+            return false;
+        },
+        "SelectAllNotesInParent": node => {
+            for (const child of node.getParent().getChildren()) {
+                child.setSelected(true);
+            }
+
+            return false;
+        },
+        "CopyNotesToClipboard": node => {
+            clipboard.copy(getSelectedOrActiveBranchIds(treeWidget, node));
+
+            return false;
+        },
+        "CutNotesToClipboard": node => {
+            clipboard.cut(getSelectedOrActiveBranchIds(treeWidget, node));
+
+            return false;
+        },
+        "PasteNotesFromClipboard": node => {
+            clipboard.pasteInto(node.data.noteId);
+
+            return false;
+        },
+        "EditNoteTitle": node => {
+            noteDetailService.focusOnTitle();
+
+            return false;
+        },
+        "ActivateParentNote": async node => {
+            if (!await hoistedNoteService.isRootNode(node)) {
+                node.getParent().setActive().then(treeWidget.clearSelectedNodes);
+            }
         }
+    };
+}
 
-        return false;
-    },
-    "CollapseSubtree": node => {
-        treeService.collapseTree(node);
-    },
-    "SortChildNotes": node => {
-        treeService.sortAlphabetically(node.data.noteId);
+/**
+ * @param {NoteTreeWidget} treeWidget
+ */
+async function getKeyboardBindings(treeWidget) {
+    const bindings = Object.assign({}, getFixedKeyBindings(treeWidget));
 
-        return false;
-    },
-    "SelectAllNotesInParent": node => {
-        for (const child of node.getParent().getChildren()) {
-            child.setSelected(true);
-        }
-
-        return false;
-    },
-    "CopyNotesToClipboard": node => {
-        clipboard.copy(treeService.getSelectedOrActiveNodes(node));
-
-        return false;
-    },
-    "CutNotesToClipboard": node => {
-        clipboard.cut(treeService.getSelectedOrActiveNodes(node));
-
-        return false;
-    },
-    "PasteNotesFromClipboard": node => {
-        clipboard.pasteInto(node);
-
-        return false;
-    },
-    "EditNoteTitle": node => {
-        noteDetailService.focusOnTitle();
-
-        return false;
-    },
-    "ActivateParentNote": async node => {
-        if (!await hoistedNoteService.isRootNode(node)) {
-            node.getParent().setActive().then(treeService.clearSelectedNodes);
-        }
-    }
-};
-
-async function getKeyboardBindings() {
-    const bindings = Object.assign({}, fixedKeyBindings);
+    const templates = getTemplates(treeWidget);
 
     for (const actionName in templates) {
         const action = await keyboardActionService.getAction(actionName);
diff --git a/src/public/javascripts/widgets/note_tree.js b/src/public/javascripts/widgets/note_tree.js
index 8b3259c82..80a95a270 100644
--- a/src/public/javascripts/widgets/note_tree.js
+++ b/src/public/javascripts/widgets/note_tree.js
@@ -8,10 +8,10 @@ import noteDetailService from "../services/note_detail.js";
 import utils from "../services/utils.js";
 import contextMenuWidget from "../services/context_menu.js";
 import treeKeyBindingService from "../services/tree_keybindings.js";
-import dragAndDropSetup from "../services/drag_and_drop.js";
 import treeCache from "../services/tree_cache.js";
 import treeBuilder from "../services/tree_builder.js";
 import TreeContextMenu from "../services/tree_context_menu.js";
+import treeChangesService from "../services/branches.js";
 
 const TPL = `
 <style>
@@ -110,9 +110,77 @@ export default class NoteTreeWidget extends BasicWidget {
             collapse: (event, data) => treeService.setExpandedToServer(data.node.data.branchId, false),
             init: (event, data) => treeService.treeInitialized(),
             hotkeys: {
-                keydown: await treeKeyBindingService.getKeyboardBindings()
+                keydown: await treeKeyBindingService.getKeyboardBindings(this)
+            },
+            dnd5: {
+                autoExpandMS: 600,
+                dragStart: (node, data) => {
+                    // don't allow dragging root node
+                    if (node.data.noteId === hoistedNoteService.getHoistedNoteNoPromise()
+                        || node.getParent().data.noteType === 'search') {
+                        return false;
+                    }
+
+                    node.setSelected(true);
+
+                    const notes = this.getSelectedNodes().map(node => { return {
+                        noteId: node.data.noteId,
+                        title: node.title
+                    }});
+
+                    data.dataTransfer.setData("text", JSON.stringify(notes));
+
+                    // This function MUST be defined to enable dragging for the tree.
+                    // Return false to cancel dragging of node.
+                    return true;
+                },
+                dragEnter: (node, data) => true, // allow drop on any node
+                dragOver: (node, data) => true,
+                dragDrop: async (node, data) => {
+                    if ((data.hitMode === 'over' && node.data.noteType === 'search') ||
+                        (['after', 'before'].includes(data.hitMode)
+                            && (node.data.noteId === hoistedNoteService.getHoistedNoteNoPromise() || node.getParent().data.noteType === 'search'))) {
+
+                        const infoDialog = await import('../dialogs/info.js');
+
+                        await infoDialog.info("Dropping notes into this location is not allowed.");
+
+                        return;
+                    }
+
+                    const dataTransfer = data.dataTransfer;
+
+                    if (dataTransfer && dataTransfer.files && dataTransfer.files.length > 0) {
+                        const files = [...dataTransfer.files]; // chrome has issue that dataTransfer.files empties after async operation
+
+                        const importService = await import('./import.js');
+
+                        importService.uploadFiles(node.data.noteId, files, {
+                            safeImport: true,
+                            shrinkImages: true,
+                            textImportedAsText: true,
+                            codeImportedAsCode: true,
+                            explodeArchives: true
+                        });
+                    }
+                    else {
+                        // This function MUST be defined to enable dropping of items on the tree.
+                        // data.hitMode is 'before', 'after', or 'over'.
+
+                        const selectedBranchIds = this.getSelectedNodes().map(node => node.data.branchId);
+
+                        if (data.hitMode === "before") {
+                            treeChangesService.moveBeforeNode(selectedBranchIds, node.data.branchId);
+                        } else if (data.hitMode === "after") {
+                            treeChangesService.moveAfterNode(selectedBranchIds, node.data.branchId);
+                        } else if (data.hitMode === "over") {
+                            treeChangesService.moveToNode(selectedBranchIds, node.data.noteId);
+                        } else {
+                            throw new Error("Unknown hitMode=" + data.hitMode);
+                        }
+                    }
+                }
             },
-            dnd5: dragAndDropSetup,
             lazyLoad: function(event, data) {
                 const noteId = data.node.data.noteId;
 
@@ -195,6 +263,21 @@ export default class NoteTreeWidget extends BasicWidget {
         node.visit(node => node.setExpanded(false));
     }
 
+    /**
+     * focused & not active node can happen during multiselection where the node is selected but not activated
+     * (its content is not displayed in the detail)
+     * @return {FancytreeNode|null}
+     */
+    getFocusedNode() {
+        return this.tree.getFocusNode();
+    }
+
+    clearSelectedNodes() {
+        for (const selectedNode of this.getSelectedNodes()) {
+            selectedNode.setSelected(false);
+        }
+    }
+
     createTopLevelNoteListener() { treeService.createNewTopLevelNote(); }
 
     collapseTreeListener() { this.collapseTree(); }