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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import {assert} from 'chrome://resources/js/assert_ts.js';
import {BOOKMARKS_BAR_ID, IncognitoAvailability, ROOT_NODE_ID} from './constants.js';
import {BookmarkNode, BookmarksPageState, NodeMap, ObjectMap} from './types.js';
/**
* @fileoverview Utility functions for the Bookmarks page.
*/
export function getDisplayedList(state: BookmarksPageState): string[] {
if (isShowingSearch(state)) {
assert(state.search.results);
return state.search.results;
}
const children = state.nodes[state.selectedFolder]!.children;
assert(children);
return children;
}
export function normalizeNode(treeNode: chrome.bookmarks.BookmarkTreeNode):
BookmarkNode {
const node = Object.assign({}, treeNode);
// Node index is not necessary and not kept up-to-date. Remove it from the
// data structure so we don't accidentally depend on the incorrect
// information.
delete node.index;
delete node.children;
const bookmarkNode = node as unknown as BookmarkNode;
if (!('url' in node)) {
// The onCreated API listener returns folders without |children| defined.
bookmarkNode.children = (treeNode.children || []).map(function(child) {
return child.id;
});
}
return bookmarkNode;
}
export function normalizeNodes(rootNode: chrome.bookmarks.BookmarkTreeNode):
NodeMap {
const nodeMap: NodeMap = {};
const stack = [];
stack.push(rootNode);
while (stack.length > 0) {
const node = stack.pop()!;
nodeMap[node.id] = normalizeNode(node);
if (!node.children) {
continue;
}
node.children.forEach(function(child) {
stack.push(child);
});
}
return nodeMap;
}
export function createEmptyState(): BookmarksPageState {
return {
nodes: {},
selectedFolder: BOOKMARKS_BAR_ID,
folderOpenState: new Map(),
prefs: {
canEdit: true,
incognitoAvailability: IncognitoAvailability.ENABLED,
},
search: {
term: '',
inProgress: false,
results: null,
},
selection: {
items: new Set(),
anchor: null,
},
};
}
export function isShowingSearch(state: BookmarksPageState): boolean {
return state.search.results != null;
}
/**
* Returns true if the node with ID |itemId| is modifiable, allowing
* the node to be renamed, moved or deleted. Note that if a node is
* uneditable, it may still have editable children (for example, the top-level
* folders).
*/
export function canEditNode(
state: BookmarksPageState, itemId: string): boolean {
return itemId !== ROOT_NODE_ID &&
state.nodes![itemId]!.parentId !== ROOT_NODE_ID &&
!state.nodes![itemId]!.unmodifiable && state.prefs.canEdit;
}
/**
* Returns true if it is possible to modify the children list of the node with
* ID |itemId|. This includes rearranging the children or adding new ones.
*/
export function canReorderChildren(
state: BookmarksPageState, itemId: string): boolean {
return itemId !== ROOT_NODE_ID && !state.nodes[itemId]!.unmodifiable &&
state.prefs.canEdit;
}
export function hasChildFolders(id: string, nodes: NodeMap): boolean {
const children = nodes[id]!.children!;
for (let i = 0; i < children.length; i++) {
if (nodes[children[i]!]!.children) {
return true;
}
}
return false;
}
export function getDescendants(nodes: NodeMap, baseId: string): Set<string> {
const descendants = new Set() as Set<string>;
const stack: string[] = [];
stack.push(baseId);
while (stack.length > 0) {
const id = stack.pop()!;
const node = nodes[id];
if (!node) {
continue;
}
descendants.add(id);
if (!node!.children) {
continue;
}
node!.children.forEach(function(childId) {
stack.push(childId);
});
}
return descendants;
}
export function removeIdsFromObject<Type>(
map: ObjectMap<Type>, ids: Set<string>): ObjectMap<Type> {
const newObject = Object.assign({}, map);
ids.forEach(function(id) {
delete newObject[id];
});
return newObject;
}
export function removeIdsFromMap<Type>(
map: Map<string, Type>, ids: Set<string>): Map<string, Type> {
const newMap = new Map(map);
ids.forEach(function(id) {
newMap.delete(id);
});
return newMap;
}
export function removeIdsFromSet(
set: Set<string>, ids: Set<string>): Set<string> {
const difference = new Set(set);
ids.forEach(function(id) {
difference.delete(id);
});
return difference;
}
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