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crumbs.ts
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crumbs.ts
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// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
'use strict';
import {
IContentsModel
} from 'jupyter-js-services';
import {
showDialog
} from 'jupyter-js-domutils';
import {
DropAction, IDragEvent
} from 'phosphor-dragdrop';
import {
Message
} from 'phosphor-messaging';
import {
IChangedArgs
} from 'phosphor-properties';
import {
Widget
} from 'phosphor-widget';
import {
FileBrowserModel
} from './model';
import * as utils
from './utils';
/**
* The class name added to the breadcrumb node.
*/
const BREADCRUMB_CLASS = 'jp-BreadCrumbs';
/**
* The class name added to the breadcrumb node.
*/
const BREADCRUMB_ITEM_CLASS = 'jp-BreadCrumbs-item';
/**
* Bread crumb paths.
*/
const BREAD_CRUMB_PATHS = ['/', '../../', '../', ''];
/**
* A class which hosts folder breadcrumbs.
*/
export
class BreadCrumbs extends Widget {
/**
* Construct a new file browser crumb widget.
*
* @param model - The file browser view model.
*/
constructor(model: FileBrowserModel) {
super();
this._model = model;
this.addClass(BREADCRUMB_CLASS);
this._crumbs = Private.createCrumbs();
this._crumbSeps = Private.createCrumbSeparators();
this.node.appendChild(this._crumbs[Private.Crumb.Home]);
this._model.refreshed.connect(this.update, this);
}
/**
* Handle the DOM events for the bread crumbs.
*
* @param event - The DOM event sent to the widget.
*
* #### Notes
* This method implements the DOM `EventListener` interface and is
* called in response to events on the panel's DOM node. It should
* not be called directly by user code.
*/
handleEvent(event: Event): void {
switch (event.type) {
case 'click':
this._evtClick(event as MouseEvent);
break;
case 'p-dragenter':
this._evtDragEnter(event as IDragEvent);
break;
case 'p-dragleave':
this._evtDragLeave(event as IDragEvent);
break;
case 'p-dragover':
this._evtDragOver(event as IDragEvent);
break;
case 'p-drop':
this._evtDrop(event as IDragEvent);
break;
}
}
/**
* A message handler invoked on an `'after-attach'` message.
*/
protected onAfterAttach(msg: Message): void {
super.onAfterAttach(msg);
let node = this.node;
node.addEventListener('click', this);
node.addEventListener('p-dragenter', this);
node.addEventListener('p-dragleave', this);
node.addEventListener('p-dragover', this);
node.addEventListener('p-drop', this);
}
/**
* A message handler invoked on a `'before-detach'` message.
*/
protected onBeforeDetach(msg: Message): void {
super.onBeforeDetach(msg);
let node = this.node;
node.removeEventListener('click', this);
node.removeEventListener('p-dragenter', this);
node.removeEventListener('p-dragleave', this);
node.removeEventListener('p-dragover', this);
node.removeEventListener('p-drop', this);
}
/**
* A handler invoked on an `'update-request'` message.
*/
protected onUpdateRequest(msg: Message): void {
// Update the breadcrumb list.
Private.updateCrumbs(this._crumbs, this._crumbSeps, this._model.path);
}
/**
* Handle the `'click'` event for the widget.
*/
private _evtClick(event: MouseEvent) {
// Do nothing if it's not a left mouse press.
if (event.button !== 0) {
return;
}
// Find a valid click target.
let node = event.target as HTMLElement;
while (node && node !== this.node) {
if (node.classList.contains(BREADCRUMB_ITEM_CLASS)) {
let index = this._crumbs.indexOf(node);
this._model.cd(BREAD_CRUMB_PATHS[index]).catch(error =>
utils.showErrorMessage(this, 'Open Error', error)
);
// Stop the event propagation.
event.preventDefault();
event.stopPropagation();
return;
}
node = node.parentElement;
}
}
/**
* Handle the `'p-dragenter'` event for the widget.
*/
private _evtDragEnter(event: IDragEvent): void {
if (event.mimeData.hasData(utils.CONTENTS_MIME)) {
let index = utils.hitTestNodes(this._crumbs, event.clientX, event.clientY);
if (index !== -1) {
if (index !== Private.Crumb.Current) {
this._crumbs[index].classList.add(utils.DROP_TARGET_CLASS);
event.preventDefault();
event.stopPropagation();
}
}
}
}
/**
* Handle the `'p-dragleave'` event for the widget.
*/
private _evtDragLeave(event: IDragEvent): void {
event.preventDefault();
event.stopPropagation();
let dropTarget = utils.findElement(this.node, utils.DROP_TARGET_CLASS);
if (dropTarget) dropTarget.classList.remove(utils.DROP_TARGET_CLASS);
}
/**
* Handle the `'p-dragover'` event for the widget.
*/
private _evtDragOver(event: IDragEvent): void {
event.preventDefault();
event.stopPropagation();
event.dropAction = event.proposedAction;
let dropTarget = utils.findElement(this.node, utils.DROP_TARGET_CLASS);
if (dropTarget) dropTarget.classList.remove(utils.DROP_TARGET_CLASS);
let index = utils.hitTestNodes(this._crumbs, event.clientX, event.clientY);
if (index !== -1) this._crumbs[index].classList.add(utils.DROP_TARGET_CLASS);
}
/**
* Handle the `'p-drop'` event for the widget.
*/
private _evtDrop(event: IDragEvent): void {
event.preventDefault();
event.stopPropagation();
if (event.proposedAction === DropAction.None) {
event.dropAction = DropAction.None;
return;
}
if (!event.mimeData.hasData(utils.CONTENTS_MIME)) {
return;
}
event.dropAction = event.proposedAction;
let target = event.target as HTMLElement;
while (target && target.parentElement) {
if (target.classList.contains(utils.DROP_TARGET_CLASS)) {
target.classList.remove(utils.DROP_TARGET_CLASS);
break;
}
target = target.parentElement;
}
// Get the path based on the target node.
let index = this._crumbs.indexOf(target);
if (index == -1) return;
var path = BREAD_CRUMB_PATHS[index];
// Move all of the items.
let promises: Promise<void>[] = [];
let items = this._model.sortedItems;
for (let item of items) {
var name = item.name;
if (!this._model.isSelected(name)) {
continue;
}
var newPath = path + name;
promises.push(this._model.rename(name, newPath).catch(error => {
if (error.xhr) {
error.message = `${error.xhr.status}: error.statusText`;
}
if (error.message.indexOf('409') !== -1) {
let options = {
title: 'Overwrite file?',
host: this.parent.node,
body: `"${newPath}" already exists, overwrite?`
}
return showDialog(options).then(button => {
if (button.text === 'OK') {
return this._model.delete(newPath).then(() => {
return this._model.rename(name, newPath).then(() => {
return this._model.refresh();
});
});
}
});
}
}));
}
Promise.all(promises).then(
() => this._model.refresh(),
err => utils.showErrorMessage(this, 'Move Error', err)
);
}
private _model: FileBrowserModel = null;
private _crumbs: HTMLElement[] = [];
private _crumbSeps: HTMLElement[] = [];
}
/**
* The namespace for the crumbs private data.
*/
namespace Private {
/**
* Breadcrumb item list enum.
*/
export
enum Crumb {
Home,
Ellipsis,
Parent,
Current
}
/**
* Populate the breadcrumb node.
*/
export
function updateCrumbs(breadcrumbs: HTMLElement[], separators: HTMLElement[], path: string) {
let node = breadcrumbs[0].parentNode;
// Remove all but the home node.
while (node.firstChild.nextSibling) {
node.removeChild(node.firstChild.nextSibling);
}
let parts = path.split('/');
if (parts.length > 2) {
node.appendChild(separators[0]);
node.appendChild(breadcrumbs[Crumb.Ellipsis]);
let grandParent = parts.slice(0, parts.length - 2).join('/');
breadcrumbs[Crumb.Ellipsis].title = grandParent
}
if (path) {
if (parts.length >= 2) {
node.appendChild(separators[1]);
breadcrumbs[Crumb.Parent].textContent = parts[parts.length - 2];
node.appendChild(breadcrumbs[Crumb.Parent]);
let parent = parts.slice(0, parts.length - 1).join('/');
breadcrumbs[Crumb.Parent].title = parent;
}
node.appendChild(separators[2]);
breadcrumbs[Crumb.Current].textContent = parts[parts.length - 1];
node.appendChild(breadcrumbs[Crumb.Current]);
breadcrumbs[Crumb.Current].title = path;
}
}
/**
* Create the breadcrumb nodes.
*/
export
function createCrumbs(): HTMLElement[] {
let home = document.createElement('i');
home.className = 'fa fa-home ' + BREADCRUMB_ITEM_CLASS;
let ellipsis = document.createElement('i');
ellipsis.className = 'fa fa-ellipsis-h ' + BREADCRUMB_ITEM_CLASS;
let parent = document.createElement('span');
parent.className = BREADCRUMB_ITEM_CLASS;
let current = document.createElement('span');
current.className = BREADCRUMB_ITEM_CLASS;
return [home, ellipsis, parent, current];
}
/**
* Create the breadcrumb separator nodes.
*/
export
function createCrumbSeparators(): HTMLElement[] {
let items: HTMLElement[] = [];
for (let i = 0; i < 3; i++) {
let item = document.createElement('i');
item.className = 'fa fa-angle-right';
items.push(item);
}
return items;
}
}