Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 | 40x 40x 40x 40x 40x 40x 40x 40x 40x 40x 40x 40x 40x 40x 980x 144x 836x 48x 788x 30x 30x 30x 30x 30x 16x 30x 30x 30x 30x 30x 16x 16x 16x 16x 16x 12x 4x 4x 16x 16x 46x 46x 46x 46x 46x 64x 64x 64x 64x 40x 40x 160x 40x 80x 80x 40x 40x 22x 22x 22x 22x 40x 10x 10x 10x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 54x 16x 16x 38x 6x 6x 198x 150x 48x 48x 14x 14x 14x 48x 62x 62x 52x 52x 10x 10x 10x 10x 52x 52x 30x 30x 30x 30x 30x 30x | import { MainAreaWidget } from '@jupyterlab/apputils';
import { IDocumentManager } from '@jupyterlab/docmanager';
import { FileEditorPanel, FileEditor } from '@jupyterlab/fileeditor';
import { MarkdownDocument, MarkdownViewer } from '@jupyterlab/markdownviewer';
import { CommandRegistry } from '@lumino/commands';
import { ISignal, Signal } from '@lumino/signaling';
import { Widget } from '@lumino/widgets';
import {
IDeckManager,
IPresenter,
TCanGoDirection,
TDirection,
CSS,
DIRECTION,
CommandIds,
DIRECTION_KEYS,
COMPOUND_KEYS,
MARKDOWN_MIMETYPES,
MARKDOWN_PREVIEW_FACTORY,
} from '../tokens';
export class SimpleMarkdownPresenter
implements IPresenter<MarkdownDocument | FileEditorPanel>
{
protected _activeChanged = new Signal<
IPresenter<MarkdownDocument | FileEditorPanel>,
void
>(this);
public readonly id = 'simple-markdown';
public readonly rank = 100;
public readonly capabilities = {};
protected _manager: IDeckManager;
protected _docManager: IDocumentManager;
protected _previousActiveCellIndex: number = -1;
protected _commands: CommandRegistry;
protected _activeSlide = new Map<MarkdownDocument, number>();
protected _lastSlide = new Map<MarkdownDocument, number>();
protected _stylesheets = new Map<MarkdownDocument, HTMLStyleElement>();
protected _activateWidget: SimpleMarkdownPresenter.IWidgetActivator;
constructor(options: SimpleMarkdownPresenter.IOptions) {
this._manager = options.manager;
this._commands = options.commands;
this._docManager = options.docManager;
this._activateWidget = options.activateWidget;
this._addKeyBindings();
this._addWindowListeners();
}
public accepts(widget: Widget): MarkdownDocument | FileEditorPanel | null {
if (widget instanceof MarkdownDocument) {
return widget;
}
if (
widget instanceof MainAreaWidget &&
widget.content instanceof FileEditor &&
MARKDOWN_MIMETYPES.includes(widget.content.model.mimeType)
) {
return widget;
}
return null;
}
public async stop(panel: MarkdownDocument | FileEditorPanel): Promise<void> {
const preview = await this._ensurePreviewPanel(panel);
this._removeStyle(preview);
return;
}
public async start(panel: MarkdownDocument | FileEditorPanel): Promise<void> {
const preview = await this._ensurePreviewPanel(panel);
if (preview != panel) {
this._activateWidget(preview);
}
await preview.content.ready;
// lab 3 doesn't appear to have a signal for "I finished rendering"
preview.content.rendered?.connect(this._onMarkdownRender, this);
const activeSlide = this._activeSlide.get(preview) || 1;
this._updateSheet(preview, activeSlide);
return;
}
public async go(
panel: MarkdownDocument | FileEditorPanel,
direction: TDirection,
alternate?: TDirection,
): Promise<void> {
panel = await this._ensurePreviewPanel(panel);
await panel.content.ready;
let index = this._activeSlide.get(panel) || 1;
let lastSlide = this._lastSlide.get(panel) || -1;
if (direction == 'forward' || alternate == 'forward') {
index++;
} else if (direction == 'back' || alternate == 'back') {
index--;
}
index = index < 1 ? 1 : index > lastSlide ? lastSlide : index;
this._updateSheet(panel, index);
}
public async canGo(
panel: MarkdownDocument | FileEditorPanel,
): Promise<Partial<TCanGoDirection>> {
panel = await this._ensurePreviewPanel(panel);
let index = this._activeSlide.get(panel) || 1;
// TODO: someplace better
let hrCount = panel.content.renderer.node.querySelectorAll('hr').length;
this._lastSlide.set(panel, hrCount);
return {
forward: index < hrCount,
back: index > 1,
};
}
public async style(panel: MarkdownDocument | FileEditorPanel): Promise<void> {
const { _manager } = this;
panel = await this._ensurePreviewPanel(panel);
panel.addClass(CSS.deck);
_manager.cacheStyle(panel.node, panel.content.node, panel.content.renderer.node);
}
public get activeChanged(): ISignal<
IPresenter<MarkdownDocument | FileEditorPanel>,
void
> {
return this._activeChanged;
}
/** overload the stock notebook keyboard shortcuts */
protected _addKeyBindings() {
for (const direction of Object.values(DIRECTION)) {
this._commands.addKeyBinding({
command: CommandIds[direction],
keys: DIRECTION_KEYS[direction],
selector: `.${CSS.deck} .${CSS.markdownViewer}`,
});
}
for (const [directions, keys] of COMPOUND_KEYS.entries()) {
const [direction, alternate] = directions;
this._commands.addKeyBinding({
command: CommandIds.go,
args: { direction, alternate },
keys,
selector: `.${CSS.deck} .${CSS.markdownViewer}`,
});
}
}
protected _addWindowListeners() {
window.addEventListener('hashchange', this._onHashChange);
}
protected _onMarkdownRender = async (viewer: MarkdownViewer) => {
Iif (this._manager.activePresenter != this) {
return viewer.rendered.disconnect(this._onMarkdownRender, this);
}
const firstChild = viewer.node.firstChild;
if (firstChild) {
(firstChild as any).setAttribute('style', '');
}
};
protected _onHashChange = async (event: HashChangeEvent) => {
const { activeWidget } = this._manager;
let panel = activeWidget && this.accepts(activeWidget);
/* istanbul ignore if */
if (!panel) {
return;
}
panel = await this._ensurePreviewPanel(panel);
const url = new URL(event.newURL);
const { hash } = url || '#';
/* istanbul ignore if */
if (hash === '#') {
return;
}
await this._activateByAnchor(panel, hash);
};
protected async _activateByAnchor(panel: MarkdownDocument, fragment: string) {
panel = await this._ensurePreviewPanel(panel);
const anchored = document.getElementById(fragment.slice(1));
/* istanbul ignore if */
if (!anchored || !panel.node.contains(anchored)) {
return;
}
let index = 0;
for (const child of panel.content.renderer.node.children) {
if (child.tagName === 'HR') {
index += 1;
continue;
}
if (child === anchored) {
this._updateSheet(panel, index);
break;
}
}
}
protected async _ensurePreviewPanel(
panel: MarkdownDocument | FileEditorPanel,
): Promise<MarkdownDocument> {
if (panel instanceof MarkdownDocument) {
return panel;
}
let preview = this._getPreviewPanel(panel);
if (preview == null || preview.isDisposed || !preview.isVisible) {
await this._commands.execute('fileeditor:markdown-preview');
preview = this._getPreviewPanel(panel);
await preview.revealed;
}
return preview;
}
protected _getPreviewPanel(panel: MarkdownDocument | FileEditorPanel) {
/* istanbul ignore if */
if (panel instanceof MarkdownDocument) {
return panel;
}
return this._docManager.findWidget(
panel.content.context.path,
MARKDOWN_PREVIEW_FACTORY,
) as MarkdownDocument;
}
protected _updateSheet(panel: MarkdownDocument, index: number) {
let sheet = this._stylesheets.get(panel);
if (sheet == null) {
sheet = document.createElement('style');
sheet.className = CSS.sheet;
this._stylesheets.set(panel, sheet);
document.body.appendChild(sheet);
}
sheet.textContent = `
#${panel.id} > .${CSS.markdownViewer} .${
CSS.renderedMarkdown
} > hr:nth-of-type(${index}) ~ :not(hr:nth-of-type(${index + 1}) ~ *):not(hr) {
display: block;
}`;
this._activeSlide.set(panel, index);
}
protected _removeStyle(panel: MarkdownDocument) {
/* istanbul ignore if */
if (panel.isDisposed) {
return;
}
const { _manager } = this;
panel.removeClass(CSS.deck);
_manager.uncacheStyle(panel.content.node, panel.node, panel.content.renderer.node);
panel.update();
panel.parent?.update();
}
}
export namespace SimpleMarkdownPresenter {
export interface IOptions {
manager: IDeckManager;
commands: CommandRegistry;
docManager: IDocumentManager;
activateWidget: IWidgetActivator;
}
export interface IWidgetActivator {
(widget: Widget): void;
}
}
|