629 lines
27 KiB
JavaScript
629 lines
27 KiB
JavaScript
import { marked } from "marked";
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import { isImageLine } from "../terminal-image.js";
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import { applyBackgroundToLine, visibleWidth, wrapTextWithAnsi } from "../utils.js";
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export class Markdown {
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text;
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paddingX; // Left/right padding
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paddingY; // Top/bottom padding
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defaultTextStyle;
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theme;
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defaultStylePrefix;
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// Cache for rendered output
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cachedText;
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cachedWidth;
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cachedLines;
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constructor(text, paddingX, paddingY, theme, defaultTextStyle) {
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this.text = text;
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this.paddingX = paddingX;
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this.paddingY = paddingY;
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this.theme = theme;
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this.defaultTextStyle = defaultTextStyle;
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}
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setText(text) {
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this.text = text;
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this.invalidate();
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}
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invalidate() {
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this.cachedText = undefined;
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this.cachedWidth = undefined;
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this.cachedLines = undefined;
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}
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render(width) {
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// Check cache
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if (this.cachedLines && this.cachedText === this.text && this.cachedWidth === width) {
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return this.cachedLines;
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}
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// Calculate available width for content (subtract horizontal padding)
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const contentWidth = Math.max(1, width - this.paddingX * 2);
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// Don't render anything if there's no actual text
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if (!this.text || this.text.trim() === "") {
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const result = [];
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// Update cache
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this.cachedText = this.text;
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this.cachedWidth = width;
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this.cachedLines = result;
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return result;
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}
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// Replace tabs with 3 spaces for consistent rendering
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const normalizedText = this.text.replace(/\t/g, " ");
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// Parse markdown to HTML-like tokens
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const tokens = marked.lexer(normalizedText);
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// Convert tokens to styled terminal output
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const renderedLines = [];
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for (let i = 0; i < tokens.length; i++) {
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const token = tokens[i];
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const nextToken = tokens[i + 1];
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const tokenLines = this.renderToken(token, contentWidth, nextToken?.type);
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renderedLines.push(...tokenLines);
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}
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// Wrap lines (NO padding, NO background yet)
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const wrappedLines = [];
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for (const line of renderedLines) {
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if (isImageLine(line)) {
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wrappedLines.push(line);
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}
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else {
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wrappedLines.push(...wrapTextWithAnsi(line, contentWidth));
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}
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}
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// Add margins and background to each wrapped line
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const leftMargin = " ".repeat(this.paddingX);
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const rightMargin = " ".repeat(this.paddingX);
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const bgFn = this.defaultTextStyle?.bgColor;
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const contentLines = [];
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for (const line of wrappedLines) {
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if (isImageLine(line)) {
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contentLines.push(line);
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continue;
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}
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const lineWithMargins = leftMargin + line + rightMargin;
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if (bgFn) {
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contentLines.push(applyBackgroundToLine(lineWithMargins, width, bgFn));
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}
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else {
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// No background - just pad to width
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const visibleLen = visibleWidth(lineWithMargins);
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const paddingNeeded = Math.max(0, width - visibleLen);
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contentLines.push(lineWithMargins + " ".repeat(paddingNeeded));
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}
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}
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// Add top/bottom padding (empty lines)
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const emptyLine = " ".repeat(width);
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const emptyLines = [];
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for (let i = 0; i < this.paddingY; i++) {
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const line = bgFn ? applyBackgroundToLine(emptyLine, width, bgFn) : emptyLine;
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emptyLines.push(line);
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}
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// Combine top padding, content, and bottom padding
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const result = [...emptyLines, ...contentLines, ...emptyLines];
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// Update cache
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this.cachedText = this.text;
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this.cachedWidth = width;
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this.cachedLines = result;
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return result.length > 0 ? result : [""];
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}
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/**
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* Apply default text style to a string.
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* This is the base styling applied to all text content.
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* NOTE: Background color is NOT applied here - it's applied at the padding stage
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* to ensure it extends to the full line width.
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*/
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applyDefaultStyle(text) {
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if (!this.defaultTextStyle) {
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return text;
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}
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let styled = text;
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// Apply foreground color (NOT background - that's applied at padding stage)
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if (this.defaultTextStyle.color) {
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styled = this.defaultTextStyle.color(styled);
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}
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// Apply text decorations using this.theme
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if (this.defaultTextStyle.bold) {
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styled = this.theme.bold(styled);
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}
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if (this.defaultTextStyle.italic) {
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styled = this.theme.italic(styled);
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}
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if (this.defaultTextStyle.strikethrough) {
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styled = this.theme.strikethrough(styled);
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}
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if (this.defaultTextStyle.underline) {
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styled = this.theme.underline(styled);
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}
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return styled;
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}
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getDefaultStylePrefix() {
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if (!this.defaultTextStyle) {
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return "";
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}
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if (this.defaultStylePrefix !== undefined) {
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return this.defaultStylePrefix;
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}
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const sentinel = "\u0000";
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let styled = sentinel;
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if (this.defaultTextStyle.color) {
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styled = this.defaultTextStyle.color(styled);
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}
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if (this.defaultTextStyle.bold) {
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styled = this.theme.bold(styled);
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}
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if (this.defaultTextStyle.italic) {
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styled = this.theme.italic(styled);
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}
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if (this.defaultTextStyle.strikethrough) {
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styled = this.theme.strikethrough(styled);
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}
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if (this.defaultTextStyle.underline) {
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styled = this.theme.underline(styled);
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}
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const sentinelIndex = styled.indexOf(sentinel);
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this.defaultStylePrefix = sentinelIndex >= 0 ? styled.slice(0, sentinelIndex) : "";
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return this.defaultStylePrefix;
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}
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getStylePrefix(styleFn) {
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const sentinel = "\u0000";
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const styled = styleFn(sentinel);
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const sentinelIndex = styled.indexOf(sentinel);
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return sentinelIndex >= 0 ? styled.slice(0, sentinelIndex) : "";
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}
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getDefaultInlineStyleContext() {
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return {
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applyText: (text) => this.applyDefaultStyle(text),
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stylePrefix: this.getDefaultStylePrefix(),
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};
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}
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renderToken(token, width, nextTokenType) {
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const lines = [];
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switch (token.type) {
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case "heading": {
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const headingLevel = token.depth;
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const headingPrefix = `${"#".repeat(headingLevel)} `;
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const headingText = this.renderInlineTokens(token.tokens || []);
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let styledHeading;
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if (headingLevel === 1) {
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styledHeading = this.theme.heading(this.theme.bold(this.theme.underline(headingText)));
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}
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else if (headingLevel === 2) {
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styledHeading = this.theme.heading(this.theme.bold(headingText));
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}
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else {
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styledHeading = this.theme.heading(this.theme.bold(headingPrefix + headingText));
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}
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lines.push(styledHeading);
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if (nextTokenType !== "space") {
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lines.push(""); // Add spacing after headings (unless space token follows)
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}
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break;
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}
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case "paragraph": {
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const paragraphText = this.renderInlineTokens(token.tokens || []);
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lines.push(paragraphText);
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// Don't add spacing if next token is space or list
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if (nextTokenType && nextTokenType !== "list" && nextTokenType !== "space") {
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lines.push("");
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}
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break;
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}
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case "code": {
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const indent = this.theme.codeBlockIndent ?? " ";
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lines.push(this.theme.codeBlockBorder(`\`\`\`${token.lang || ""}`));
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if (this.theme.highlightCode) {
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const highlightedLines = this.theme.highlightCode(token.text, token.lang);
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for (const hlLine of highlightedLines) {
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lines.push(`${indent}${hlLine}`);
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}
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}
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else {
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// Split code by newlines and style each line
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const codeLines = token.text.split("\n");
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for (const codeLine of codeLines) {
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lines.push(`${indent}${this.theme.codeBlock(codeLine)}`);
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}
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}
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lines.push(this.theme.codeBlockBorder("```"));
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if (nextTokenType !== "space") {
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lines.push(""); // Add spacing after code blocks (unless space token follows)
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}
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break;
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}
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case "list": {
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const listLines = this.renderList(token, 0);
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lines.push(...listLines);
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// Don't add spacing after lists if a space token follows
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// (the space token will handle it)
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break;
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}
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case "table": {
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const tableLines = this.renderTable(token, width);
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lines.push(...tableLines);
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break;
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}
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case "blockquote": {
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const quoteStyle = (text) => this.theme.quote(this.theme.italic(text));
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const quoteStyleContext = {
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applyText: quoteStyle,
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stylePrefix: this.getStylePrefix(quoteStyle),
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};
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const quoteText = this.renderInlineTokens(token.tokens || [], quoteStyleContext);
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const quoteLines = quoteText.split("\n");
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// Calculate available width for quote content (subtract border "│ " = 2 chars)
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const quoteContentWidth = Math.max(1, width - 2);
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for (const quoteLine of quoteLines) {
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// Wrap the styled line, then add border to each wrapped line
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const wrappedLines = wrapTextWithAnsi(quoteLine, quoteContentWidth);
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for (const wrappedLine of wrappedLines) {
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lines.push(this.theme.quoteBorder("│ ") + wrappedLine);
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}
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}
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if (nextTokenType !== "space") {
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lines.push(""); // Add spacing after blockquotes (unless space token follows)
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}
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break;
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}
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case "hr":
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lines.push(this.theme.hr("─".repeat(Math.min(width, 80))));
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if (nextTokenType !== "space") {
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lines.push(""); // Add spacing after horizontal rules (unless space token follows)
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}
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break;
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case "html":
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// Render HTML as plain text (escaped for terminal)
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if ("raw" in token && typeof token.raw === "string") {
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lines.push(this.applyDefaultStyle(token.raw.trim()));
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}
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break;
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case "space":
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// Space tokens represent blank lines in markdown
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lines.push("");
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break;
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default:
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// Handle any other token types as plain text
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if ("text" in token && typeof token.text === "string") {
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lines.push(token.text);
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}
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}
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return lines;
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}
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renderInlineTokens(tokens, styleContext) {
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let result = "";
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const resolvedStyleContext = styleContext ?? this.getDefaultInlineStyleContext();
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const { applyText, stylePrefix } = resolvedStyleContext;
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const applyTextWithNewlines = (text) => {
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const segments = text.split("\n");
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return segments.map((segment) => applyText(segment)).join("\n");
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};
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for (const token of tokens) {
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switch (token.type) {
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case "text":
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// Text tokens in list items can have nested tokens for inline formatting
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if (token.tokens && token.tokens.length > 0) {
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result += this.renderInlineTokens(token.tokens, resolvedStyleContext);
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}
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else {
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result += applyTextWithNewlines(token.text);
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}
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break;
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case "paragraph":
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// Paragraph tokens contain nested inline tokens
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result += this.renderInlineTokens(token.tokens || [], resolvedStyleContext);
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break;
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case "strong": {
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const boldContent = this.renderInlineTokens(token.tokens || [], resolvedStyleContext);
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result += this.theme.bold(boldContent) + stylePrefix;
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break;
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}
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case "em": {
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const italicContent = this.renderInlineTokens(token.tokens || [], resolvedStyleContext);
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result += this.theme.italic(italicContent) + stylePrefix;
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break;
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}
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case "codespan":
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result += this.theme.code(token.text) + stylePrefix;
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break;
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case "link": {
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const linkText = this.renderInlineTokens(token.tokens || [], resolvedStyleContext);
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// If link text matches href, only show the link once
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// Compare raw text (token.text) not styled text (linkText) since linkText has ANSI codes
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// For mailto: links, strip the prefix before comparing (autolinked emails have
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// text="foo@bar.com" but href="mailto:foo@bar.com")
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const hrefForComparison = token.href.startsWith("mailto:") ? token.href.slice(7) : token.href;
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if (token.text === token.href || token.text === hrefForComparison) {
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result += this.theme.link(this.theme.underline(linkText)) + stylePrefix;
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}
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else {
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result +=
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this.theme.link(this.theme.underline(linkText)) +
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this.theme.linkUrl(` (${token.href})`) +
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stylePrefix;
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}
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break;
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}
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case "br":
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result += "\n";
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break;
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case "del": {
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const delContent = this.renderInlineTokens(token.tokens || [], resolvedStyleContext);
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result += this.theme.strikethrough(delContent) + stylePrefix;
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break;
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}
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case "html":
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// Render inline HTML as plain text
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if ("raw" in token && typeof token.raw === "string") {
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result += applyTextWithNewlines(token.raw);
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}
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break;
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default:
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// Handle any other inline token types as plain text
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if ("text" in token && typeof token.text === "string") {
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result += applyTextWithNewlines(token.text);
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}
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}
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}
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return result;
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}
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/**
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* Render a list with proper nesting support
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*/
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renderList(token, depth) {
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const lines = [];
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const indent = " ".repeat(depth);
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// Use the list's start property (defaults to 1 for ordered lists)
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const startNumber = token.start ?? 1;
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for (let i = 0; i < token.items.length; i++) {
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const item = token.items[i];
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const bullet = token.ordered ? `${startNumber + i}. ` : "- ";
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// Process item tokens to handle nested lists
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const itemLines = this.renderListItem(item.tokens || [], depth);
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if (itemLines.length > 0) {
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// First line - check if it's a nested list
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// A nested list will start with indent (spaces) followed by cyan bullet
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const firstLine = itemLines[0];
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const isNestedList = /^\s+\x1b\[36m[-\d]/.test(firstLine); // starts with spaces + cyan + bullet char
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if (isNestedList) {
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// This is a nested list, just add it as-is (already has full indent)
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lines.push(firstLine);
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}
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else {
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// Regular text content - add indent and bullet
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lines.push(indent + this.theme.listBullet(bullet) + firstLine);
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}
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// Rest of the lines
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for (let j = 1; j < itemLines.length; j++) {
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const line = itemLines[j];
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const isNestedListLine = /^\s+\x1b\[36m[-\d]/.test(line); // starts with spaces + cyan + bullet char
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if (isNestedListLine) {
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// Nested list line - already has full indent
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lines.push(line);
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}
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else {
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// Regular content - add parent indent + 2 spaces for continuation
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lines.push(`${indent} ${line}`);
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}
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}
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}
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else {
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lines.push(indent + this.theme.listBullet(bullet));
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}
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}
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return lines;
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}
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/**
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* Render list item tokens, handling nested lists
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* Returns lines WITHOUT the parent indent (renderList will add it)
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*/
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renderListItem(tokens, parentDepth) {
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const lines = [];
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for (const token of tokens) {
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if (token.type === "list") {
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// Nested list - render with one additional indent level
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// These lines will have their own indent, so we just add them as-is
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const nestedLines = this.renderList(token, parentDepth + 1);
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lines.push(...nestedLines);
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}
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else if (token.type === "text") {
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// Text content (may have inline tokens)
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const text = token.tokens && token.tokens.length > 0 ? this.renderInlineTokens(token.tokens) : token.text || "";
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lines.push(text);
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}
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else if (token.type === "paragraph") {
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// Paragraph in list item
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const text = this.renderInlineTokens(token.tokens || []);
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lines.push(text);
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}
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else if (token.type === "code") {
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// Code block in list item
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const indent = this.theme.codeBlockIndent ?? " ";
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lines.push(this.theme.codeBlockBorder(`\`\`\`${token.lang || ""}`));
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if (this.theme.highlightCode) {
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const highlightedLines = this.theme.highlightCode(token.text, token.lang);
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for (const hlLine of highlightedLines) {
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lines.push(`${indent}${hlLine}`);
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}
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}
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else {
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const codeLines = token.text.split("\n");
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for (const codeLine of codeLines) {
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lines.push(`${indent}${this.theme.codeBlock(codeLine)}`);
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}
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}
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lines.push(this.theme.codeBlockBorder("```"));
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}
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else {
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// Other token types - try to render as inline
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const text = this.renderInlineTokens([token]);
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if (text) {
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lines.push(text);
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}
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}
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}
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return lines;
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}
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/**
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* Get the visible width of the longest word in a string.
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*/
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getLongestWordWidth(text, maxWidth) {
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const words = text.split(/\s+/).filter((word) => word.length > 0);
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let longest = 0;
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for (const word of words) {
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longest = Math.max(longest, visibleWidth(word));
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}
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if (maxWidth === undefined) {
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return longest;
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}
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return Math.min(longest, maxWidth);
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}
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/**
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* Wrap a table cell to fit into a column.
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*
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* Delegates to wrapTextWithAnsi() so ANSI codes + long tokens are handled
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* consistently with the rest of the renderer.
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*/
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wrapCellText(text, maxWidth) {
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return wrapTextWithAnsi(text, Math.max(1, maxWidth));
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}
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/**
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* Render a table with width-aware cell wrapping.
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* Cells that don't fit are wrapped to multiple lines.
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*/
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renderTable(token, availableWidth) {
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const lines = [];
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const numCols = token.header.length;
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if (numCols === 0) {
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return lines;
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}
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// Calculate border overhead: "│ " + (n-1) * " │ " + " │"
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// = 2 + (n-1) * 3 + 2 = 3n + 1
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const borderOverhead = 3 * numCols + 1;
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const availableForCells = availableWidth - borderOverhead;
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if (availableForCells < numCols) {
|
|
// Too narrow to render a stable table. Fall back to raw markdown.
|
|
const fallbackLines = token.raw ? wrapTextWithAnsi(token.raw, availableWidth) : [];
|
|
fallbackLines.push("");
|
|
return fallbackLines;
|
|
}
|
|
const maxUnbrokenWordWidth = 30;
|
|
// Calculate natural column widths (what each column needs without constraints)
|
|
const naturalWidths = [];
|
|
const minWordWidths = [];
|
|
for (let i = 0; i < numCols; i++) {
|
|
const headerText = this.renderInlineTokens(token.header[i].tokens || []);
|
|
naturalWidths[i] = visibleWidth(headerText);
|
|
minWordWidths[i] = Math.max(1, this.getLongestWordWidth(headerText, maxUnbrokenWordWidth));
|
|
}
|
|
for (const row of token.rows) {
|
|
for (let i = 0; i < row.length; i++) {
|
|
const cellText = this.renderInlineTokens(row[i].tokens || []);
|
|
naturalWidths[i] = Math.max(naturalWidths[i] || 0, visibleWidth(cellText));
|
|
minWordWidths[i] = Math.max(minWordWidths[i] || 1, this.getLongestWordWidth(cellText, maxUnbrokenWordWidth));
|
|
}
|
|
}
|
|
let minColumnWidths = minWordWidths;
|
|
let minCellsWidth = minColumnWidths.reduce((a, b) => a + b, 0);
|
|
if (minCellsWidth > availableForCells) {
|
|
minColumnWidths = new Array(numCols).fill(1);
|
|
const remaining = availableForCells - numCols;
|
|
if (remaining > 0) {
|
|
const totalWeight = minWordWidths.reduce((total, width) => total + Math.max(0, width - 1), 0);
|
|
const growth = minWordWidths.map((width) => {
|
|
const weight = Math.max(0, width - 1);
|
|
return totalWeight > 0 ? Math.floor((weight / totalWeight) * remaining) : 0;
|
|
});
|
|
for (let i = 0; i < numCols; i++) {
|
|
minColumnWidths[i] += growth[i] ?? 0;
|
|
}
|
|
const allocated = growth.reduce((total, width) => total + width, 0);
|
|
let leftover = remaining - allocated;
|
|
for (let i = 0; leftover > 0 && i < numCols; i++) {
|
|
minColumnWidths[i]++;
|
|
leftover--;
|
|
}
|
|
}
|
|
minCellsWidth = minColumnWidths.reduce((a, b) => a + b, 0);
|
|
}
|
|
// Calculate column widths that fit within available width
|
|
const totalNaturalWidth = naturalWidths.reduce((a, b) => a + b, 0) + borderOverhead;
|
|
let columnWidths;
|
|
if (totalNaturalWidth <= availableWidth) {
|
|
// Everything fits naturally
|
|
columnWidths = naturalWidths.map((width, index) => Math.max(width, minColumnWidths[index]));
|
|
}
|
|
else {
|
|
// Need to shrink columns to fit
|
|
const totalGrowPotential = naturalWidths.reduce((total, width, index) => {
|
|
return total + Math.max(0, width - minColumnWidths[index]);
|
|
}, 0);
|
|
const extraWidth = Math.max(0, availableForCells - minCellsWidth);
|
|
columnWidths = minColumnWidths.map((minWidth, index) => {
|
|
const naturalWidth = naturalWidths[index];
|
|
const minWidthDelta = Math.max(0, naturalWidth - minWidth);
|
|
let grow = 0;
|
|
if (totalGrowPotential > 0) {
|
|
grow = Math.floor((minWidthDelta / totalGrowPotential) * extraWidth);
|
|
}
|
|
return minWidth + grow;
|
|
});
|
|
// Adjust for rounding errors - distribute remaining space
|
|
const allocated = columnWidths.reduce((a, b) => a + b, 0);
|
|
let remaining = availableForCells - allocated;
|
|
while (remaining > 0) {
|
|
let grew = false;
|
|
for (let i = 0; i < numCols && remaining > 0; i++) {
|
|
if (columnWidths[i] < naturalWidths[i]) {
|
|
columnWidths[i]++;
|
|
remaining--;
|
|
grew = true;
|
|
}
|
|
}
|
|
if (!grew) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// Render top border
|
|
const topBorderCells = columnWidths.map((w) => "─".repeat(w));
|
|
lines.push(`┌─${topBorderCells.join("─┬─")}─┐`);
|
|
// Render header with wrapping
|
|
const headerCellLines = token.header.map((cell, i) => {
|
|
const text = this.renderInlineTokens(cell.tokens || []);
|
|
return this.wrapCellText(text, columnWidths[i]);
|
|
});
|
|
const headerLineCount = Math.max(...headerCellLines.map((c) => c.length));
|
|
for (let lineIdx = 0; lineIdx < headerLineCount; lineIdx++) {
|
|
const rowParts = headerCellLines.map((cellLines, colIdx) => {
|
|
const text = cellLines[lineIdx] || "";
|
|
const padded = text + " ".repeat(Math.max(0, columnWidths[colIdx] - visibleWidth(text)));
|
|
return this.theme.bold(padded);
|
|
});
|
|
lines.push(`│ ${rowParts.join(" │ ")} │`);
|
|
}
|
|
// Render separator
|
|
const separatorCells = columnWidths.map((w) => "─".repeat(w));
|
|
const separatorLine = `├─${separatorCells.join("─┼─")}─┤`;
|
|
lines.push(separatorLine);
|
|
// Render rows with wrapping
|
|
for (let rowIndex = 0; rowIndex < token.rows.length; rowIndex++) {
|
|
const row = token.rows[rowIndex];
|
|
const rowCellLines = row.map((cell, i) => {
|
|
const text = this.renderInlineTokens(cell.tokens || []);
|
|
return this.wrapCellText(text, columnWidths[i]);
|
|
});
|
|
const rowLineCount = Math.max(...rowCellLines.map((c) => c.length));
|
|
for (let lineIdx = 0; lineIdx < rowLineCount; lineIdx++) {
|
|
const rowParts = rowCellLines.map((cellLines, colIdx) => {
|
|
const text = cellLines[lineIdx] || "";
|
|
return text + " ".repeat(Math.max(0, columnWidths[colIdx] - visibleWidth(text)));
|
|
});
|
|
lines.push(`│ ${rowParts.join(" │ ")} │`);
|
|
}
|
|
if (rowIndex < token.rows.length - 1) {
|
|
lines.push(separatorLine);
|
|
}
|
|
}
|
|
// Render bottom border
|
|
const bottomBorderCells = columnWidths.map((w) => "─".repeat(w));
|
|
lines.push(`└─${bottomBorderCells.join("─┴─")}─┘`);
|
|
lines.push(""); // Add spacing after table
|
|
return lines;
|
|
}
|
|
}
|
|
//# sourceMappingURL=markdown.js.map
|