Rename markdown to markdown-language-features

extensions/markdown-language-features/preview-src/activeLineMarker.ts

@@ -0,0 +1,34 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+import { getElementsForSourceLine } from './scroll-sync';
+
+export class ActiveLineMarker {
+	private _current: any;
+
+	onDidChangeTextEditorSelection(line: number) {
+		const { previous } = getElementsForSourceLine(line);
+		this._update(previous && previous.element);
+	}
+
+	_update(before: HTMLElement | undefined) {
+		this._unmarkActiveElement(this._current);
+		this._markActiveElement(before);
+		this._current = before;
+	}
+
+	_unmarkActiveElement(element: HTMLElement | undefined) {
+		if (!element) {
+			return;
+		}
+		element.className = element.className.replace(/\bcode-active-line\b/g, '');
+	}
+
+	_markActiveElement(element: HTMLElement | undefined) {
+		if (!element) {
+			return;
+		}
+		element.className += ' code-active-line';
+	}
+}

extensions/markdown-language-features/preview-src/csp.ts

@@ -0,0 +1,49 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { getSettings } from './settings';
+import { getStrings } from './strings';
+import { postCommand } from './messaging';
+
+/**
+ * Shows an alert when there is a content security policy violation.
+ */
+export class CspAlerter {
+	private didShow = false;
+
+	constructor() {
+		document.addEventListener('securitypolicyviolation', () => {
+			this.showCspWarning();
+		});
+
+		window.addEventListener('message', (event) => {
+			if (event && event.data && event.data.name === 'vscode-did-block-svg') {
+				this.showCspWarning();
+			}
+		});
+	}
+
+	private showCspWarning() {
+		const strings = getStrings();
+		const settings = getSettings();
+
+		if (this.didShow || settings.disableSecurityWarnings) {
+			return;
+		}
+		this.didShow = true;
+
+		const notification = document.createElement('a');
+		notification.innerText = strings.cspAlertMessageText;
+		notification.setAttribute('id', 'code-csp-warning');
+		notification.setAttribute('title', strings.cspAlertMessageTitle);
+
+		notification.setAttribute('role', 'button');
+		notification.setAttribute('aria-label', strings.cspAlertMessageLabel);
+		notification.onclick = () => {
+			postCommand('markdown.showPreviewSecuritySelector', [settings.source]);
+		};
+		document.body.appendChild(notification);
+	}
+}

extensions/markdown-language-features/preview-src/events.ts

@@ -0,0 +1,12 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+export function onceDocumentLoaded(f: () => void) {
+	if (document.readyState === 'loading' || document.readyState === 'uninitialized') {
+		document.addEventListener('DOMContentLoaded', f);
+	} else {
+		f();
+	}
+}

extensions/markdown-language-features/preview-src/index.ts

@@ -0,0 +1,117 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { getSettings } from './settings';
+import { postCommand, postMessage } from './messaging';
+import { onceDocumentLoaded } from './events';
+import { getEditorLineNumberForPageOffset, scrollToRevealSourceLine } from './scroll-sync';
+import { ActiveLineMarker } from './activeLineMarker';
+import throttle = require('lodash.throttle');
+
+var scrollDisabled = true;
+const marker = new ActiveLineMarker();
+const settings = getSettings();
+
+onceDocumentLoaded(() => {
+	if (settings.scrollPreviewWithEditor) {
+		setTimeout(() => {
+			const initialLine = +settings.line;
+			if (!isNaN(initialLine)) {
+				scrollDisabled = true;
+				scrollToRevealSourceLine(initialLine);
+			}
+		}, 0);
+	}
+});
+
+const onUpdateView = (() => {
+	const doScroll = throttle((line: number) => {
+		scrollDisabled = true;
+		scrollToRevealSourceLine(line);
+	}, 50);
+
+	return (line: number, settings: any) => {
+		if (!isNaN(line)) {
+			settings.line = line;
+			doScroll(line);
+		}
+	};
+})();
+
+window.addEventListener('resize', () => {
+	scrollDisabled = true;
+}, true);
+
+window.addEventListener('message', event => {
+	if (event.data.source !== settings.source) {
+		return;
+	}
+
+	switch (event.data.type) {
+		case 'onDidChangeTextEditorSelection':
+			marker.onDidChangeTextEditorSelection(event.data.line);
+			break;
+
+		case 'updateView':
+			onUpdateView(event.data.line, settings);
+			break;
+	}
+}, false);
+
+document.addEventListener('dblclick', event => {
+	if (!settings.doubleClickToSwitchToEditor) {
+		return;
+	}
+
+	// Ignore clicks on links
+	for (let node = event.target as HTMLElement; node; node = node.parentNode as HTMLElement) {
+		if (node.tagName === 'A') {
+			return;
+		}
+	}
+
+	const offset = event.pageY;
+	const line = getEditorLineNumberForPageOffset(offset);
+	if (typeof line === 'number' && !isNaN(line)) {
+		postMessage('didClick', { line });
+	}
+});
+
+document.addEventListener('click', event => {
+	if (!event) {
+		return;
+	}
+
+	let node: any = event.target;
+	while (node) {
+		if (node.tagName && node.tagName === 'A' && node.href) {
+			if (node.getAttribute('href').startsWith('#')) {
+				break;
+			}
+			if (node.href.startsWith('file://') || node.href.startsWith('vscode-resource:')) {
+				const [path, fragment] = node.href.replace(/^(file:\/\/|vscode-resource:)/i, '').split('#');
+				postCommand('_markdown.openDocumentLink', [{ path, fragment }]);
+				event.preventDefault();
+				event.stopPropagation();
+				break;
+			}
+			break;
+		}
+		node = node.parentNode;
+	}
+}, true);
+
+if (settings.scrollEditorWithPreview) {
+	window.addEventListener('scroll', throttle(() => {
+		if (scrollDisabled) {
+			scrollDisabled = false;
+		} else {
+			const line = getEditorLineNumberForPageOffset(window.scrollY);
+			if (typeof line === 'number' && !isNaN(line)) {
+				postMessage('revealLine', { line });
+			}
+		}
+	}, 50));
+}

extensions/markdown-language-features/preview-src/loading.ts

@@ -0,0 +1,31 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+import { postCommand } from './messaging';
+
+export class StyleLoadingMonitor {
+	private unloadedStyles: string[] = [];
+
+	constructor() {
+		const onStyleLoadError = (event: any) => {
+			const source = event.target.dataset.source;
+			this.unloadedStyles.push(source);
+		};
+
+		window.addEventListener('DOMContentLoaded', () => {
+			for (const link of document.getElementsByClassName('code-user-style') as HTMLCollectionOf<HTMLElement>) {
+				if (link.dataset.source) {
+					link.onerror = onStyleLoadError;
+				}
+			}
+		});
+
+		window.addEventListener('load', () => {
+			if (!this.unloadedStyles.length) {
+				return;
+			}
+			postCommand('_markdown.onPreviewStyleLoadError', [this.unloadedStyles]);
+		});
+	}
+}

extensions/markdown-language-features/preview-src/messaging.ts

@@ -0,0 +1,24 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { getSettings } from './settings';
+
+/**
+ * Post a message to the markdown extension
+ */
+export function postMessage(type: string, body: object) {
+	window.parent.postMessage({
+		type,
+		source: getSettings().source,
+		body
+	}, '*');
+}
+
+/**
+ * Post a command to be executed to the markdown extension
+ */
+export function postCommand(command: string, args: any[]) {
+	postMessage('command', { command, args });
+}

extensions/markdown-language-features/preview-src/pre.ts

@@ -0,0 +1,13 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { CspAlerter } from './csp';
+import { StyleLoadingMonitor } from './loading';
+
+// tslint:disable-next-line:no-unused-expression
+new CspAlerter();
+
+// tslint:disable-next-line:no-unused-expression
+new StyleLoadingMonitor();

extensions/markdown-language-features/preview-src/scroll-sync.ts

@@ -0,0 +1,127 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { getSettings } from './settings';
+
+
+function clamp(min: number, max: number, value: number) {
+	return Math.min(max, Math.max(min, value));
+}
+
+function clampLine(line: number) {
+	return clamp(0, getSettings().lineCount - 1, line);
+}
+
+
+export interface CodeLineElement {
+	element: HTMLElement;
+	line: number;
+}
+
+const getCodeLineElements = (() => {
+	let elements: CodeLineElement[];
+	return () => {
+		if (!elements) {
+			elements = Array.prototype.map.call(
+				document.getElementsByClassName('code-line'),
+				(element: any) => {
+					const line = +element.getAttribute('data-line');
+					return { element, line };
+				})
+				.filter((x: any) => !isNaN(x.line));
+		}
+		return elements;
+	};
+})();
+
+/**
+ * Find the html elements that map to a specific target line in the editor.
+ *
+ * If an exact match, returns a single element. If the line is between elements,
+ * returns the element prior to and the element after the given line.
+ */
+export function getElementsForSourceLine(targetLine: number): { previous: CodeLineElement; next?: CodeLineElement; } {
+	const lineNumber = Math.floor(targetLine);
+	const lines = getCodeLineElements();
+	let previous = lines[0] || null;
+	for (const entry of lines) {
+		if (entry.line === lineNumber) {
+			return { previous: entry, next: undefined };
+		}
+		else if (entry.line > lineNumber) {
+			return { previous, next: entry };
+		}
+		previous = entry;
+	}
+	return { previous };
+}
+
+/**
+ * Find the html elements that are at a specific pixel offset on the page.
+ */
+export function getLineElementsAtPageOffset(offset: number): { previous: CodeLineElement; next?: CodeLineElement; } {
+	const lines = getCodeLineElements();
+	const position = offset - window.scrollY;
+	let lo = -1;
+	let hi = lines.length - 1;
+	while (lo + 1 < hi) {
+		const mid = Math.floor((lo + hi) / 2);
+		const bounds = lines[mid].element.getBoundingClientRect();
+		if (bounds.top + bounds.height >= position) {
+			hi = mid;
+		}
+		else {
+			lo = mid;
+		}
+	}
+	const hiElement = lines[hi];
+	const hiBounds = hiElement.element.getBoundingClientRect();
+	if (hi >= 1 && hiBounds.top > position) {
+		const loElement = lines[lo];
+		return { previous: loElement, next: hiElement };
+	}
+	return { previous: hiElement };
+}
+
+/**
+ * Attempt to reveal the element for a source line in the editor.
+ */
+export function scrollToRevealSourceLine(line: number) {
+	const { previous, next } = getElementsForSourceLine(line);
+	if (previous && getSettings().scrollPreviewWithEditor) {
+		let scrollTo = 0;
+		const rect = previous.element.getBoundingClientRect();
+		const previousTop = rect.top;
+		if (next && next.line !== previous.line) {
+			// Between two elements. Go to percentage offset between them.
+			const betweenProgress = (line - previous.line) / (next.line - previous.line);
+			const elementOffset = next.element.getBoundingClientRect().top - previousTop;
+			scrollTo = previousTop + betweenProgress * elementOffset;
+		}
+		else {
+			scrollTo = previousTop;
+		}
+		window.scroll(0, Math.max(1, window.scrollY + scrollTo));
+	}
+}
+
+export function getEditorLineNumberForPageOffset(offset: number) {
+	const { previous, next } = getLineElementsAtPageOffset(offset);
+	if (previous) {
+		const previousBounds = previous.element.getBoundingClientRect();
+		const offsetFromPrevious = (offset - window.scrollY - previousBounds.top);
+		if (next) {
+			const progressBetweenElements = offsetFromPrevious / (next.element.getBoundingClientRect().top - previousBounds.top);
+			const line = previous.line + progressBetweenElements * (next.line - previous.line);
+			return clampLine(line);
+		}
+		else {
+			const progressWithinElement = offsetFromPrevious / (previousBounds.height);
+			const line = previous.line + progressWithinElement;
+			return clampLine(line);
+		}
+	}
+	return null;
+}

extensions/markdown-language-features/preview-src/settings.ts

@@ -0,0 +1,33 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+export interface PreviewSettings {
+	source: string;
+	line: number;
+	lineCount: number;
+	scrollPreviewWithEditor?: boolean;
+	scrollEditorWithPreview: boolean;
+	disableSecurityWarnings: boolean;
+	doubleClickToSwitchToEditor: boolean;
+}
+
+let cachedSettings: PreviewSettings | undefined = undefined;
+
+export function getSettings(): PreviewSettings {
+	if (cachedSettings) {
+		return cachedSettings;
+	}
+
+	const element = document.getElementById('vscode-markdown-preview-data');
+	if (element) {
+		const data = element.getAttribute('data-settings');
+		if (data) {
+			cachedSettings = JSON.parse(data);
+			return cachedSettings!;
+		}
+	}
+
+	throw new Error('Could not load settings');
+}

extensions/markdown-language-features/preview-src/strings.ts

@@ -0,0 +1,15 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+export function getStrings(): { [key: string]: string } {
+	const store = document.getElementById('vscode-markdown-preview-data');
+	if (store) {
+		const data = store.getAttribute('data-strings');
+		if (data) {
+			return JSON.parse(data);
+		}
+	}
+	throw new Error('Could not load strings');
+}

extensions/markdown-language-features/preview-src/tsconfig.json

@@ -0,0 +1,12 @@
+{
+	"compilerOptions": {
+		"outDir": "./dist/",
+		"module": "commonjs",
+		"target": "es6",
+		"jsx": "react",
+		"sourceMap": true,
+		"strict": true,
+		"noImplicitAny": true,
+		"noUnusedLocals": true
+	}
+}