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| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 | /** * GFMR Language Detection Module * * Handles language detection for syntax highlighting. * Extracted from gfmr-main.js for better modularity. * * @package MarkdownRendererForGitHub * @since 1.8.0 */ (function () { "use strict"; /** * Language Detector - provides language detection utilities */ const LanguageDetector = { /** * Detect language from element class, data attributes, or content * * @param {HTMLElement} element - The code element to analyze * @return {string} Detected language or 'plaintext' */ detectLanguage(element) { console.log("[DEBUG] Starting language detection for element:", { tagName: element.tagName, className: element.className, classList: Array.from(element.classList || []), outerHTML: element.outerHTML.substring(0, 200), }); // 1. Standard language class detection const className = element.className || ""; const match = className.match(/language-(\w+)/); if (match) { console.log("[DEBUG] Language detected from element:", match[1]); return match[1]; } // 2. Detection from parent elements let parent = element.parentElement; while (parent && parent !== document.body) { const parentClassName = parent.className || ""; const parentMatch = parentClassName.match(/language-(\w+)/); if (parentMatch) { console.log( "[DEBUG] Language detected from parent:", parentMatch[1], "parent:", parent.tagName ); return parentMatch[1]; } parent = parent.parentElement; } // 3. Data attribute check const dataLang = element.getAttribute("data-language") || element.closest("[data-language]")?.getAttribute("data-language"); if (dataLang) { console.log("[DEBUG] Language detected from data attribute:", dataLang); return dataLang; } // 4. Infer language from already Shiki-highlighted code if (this.isAlreadyHighlighted(element)) { const inferredLang = this.inferLanguageFromHighlightedCode(element); if (inferredLang !== "plaintext") { console.log( "[DEBUG] Language inferred from highlighted code:", inferredLang ); return inferredLang; } } console.log("[DEBUG] No language detected, falling back to plaintext"); return "plaintext"; }, /** * Check if element is already syntax highlighted * * @param {HTMLElement} element - The code element to check * @return {boolean} True if already highlighted */ isAlreadyHighlighted(element) { const hasShikiSpans = element.querySelector( 'span.line, span[style*="color:"]' ); const hasHighlightClass = element.classList.contains("hljs") || element.classList.contains("shiki"); return !!(hasShikiSpans || hasHighlightClass); }, /** * Infer language from highlighted code content * * @param {HTMLElement} element - The code element to analyze * @return {string} Inferred language or 'plaintext' */ inferLanguageFromHighlightedCode(element) { const text = element.textContent || ""; console.log( "[DEBUG] Language inference target text:", text.substring(0, 100) + "..." ); // 1. Language detection by comment syntax (highest priority) if (/^\/\/\s*(JavaScript|JS|TypeScript|TS)/i.test(text.trim())) { console.log("[DEBUG] Inferred as JavaScript from comment"); return "javascript"; } if (/^#\s*Python/i.test(text.trim())) { console.log("[DEBUG] Inferred as Python from comment"); return "python"; } if (/^#\s*(YAML|YML)/i.test(text.trim())) { console.log("[DEBUG] Inferred as YAML from comment"); return "yaml"; } if ( /^\/\*\s*(CSS|Style)/i.test(text.trim()) || /^\/\/\s*(CSS|Style)/i.test(text.trim()) ) { console.log("[DEBUG] Inferred as CSS from comment"); return "css"; } if (/^<!--\s*(HTML)/i.test(text.trim())) { console.log("[DEBUG] Inferred as HTML from comment"); return "html"; } // Diff/patch patterns (MUST be checked BEFORE bash due to 'sh' in path patterns) // Includes: git diff headers, unified diff headers, hunk headers, and content-only diffs if ( /^diff --git\s/m.test(text) || // git diff header /^---\s+[ab]\//.test(text.trim()) || // unified diff file header (a/...) /^---\s+\/dev\/null/.test(text.trim()) || // new file diff header /^\+\+\+\s+[ab]\//.test(text.trim()) || // unified diff file header (b/...) /^\+\+\+\s+\/dev\/null/.test(text.trim()) || // deleted file diff header /^@@\s+-\d+,?\d*\s+\+\d+,?\d*\s+@@/m.test(text) || // hunk header (anywhere in content) this.isContentOnlyDiff(text) // content-only patch (just +/- lines) ) { console.log('[DEBUG] Inferred as diff language'); return 'diff'; } // 2. Bash/Shell patterns (high priority) if ( /^#!/.test(text.trim()) || /\b(set -[euxo]|function\s+\w+|if\s*\[|for\s+\w+\s+in|case\s+.*\s+in|echo\s|export\s|source\s|bash|sh\b)/m.test( text ) ) { console.log("[DEBUG] Inferred as Bash language"); return "bash"; } // Mermaid patterns (high priority) if ( /\b(graph|flowchart|sequenceDiagram|classDiagram|stateDiagram|erDiagram|gitGraph|gantt|pie|journey)\b/i.test( text ) ) { console.log("[DEBUG] Inferred as Mermaid language"); return "mermaid"; } // YAML patterns (priority over JavaScript/TypeScript) if (this.isYamlContent(text)) { console.log("[DEBUG] Inferred as YAML language"); return "yaml"; } // JSX/TSX patterns (high priority) if ( /<[A-Z]\w*[^>]*\/?>/.test(text) && /\b(const|let|var|import|export|function|return)\b/.test(text) ) { console.log("[DEBUG] Inferred as JSX/TSX language"); return "javascript"; } // Rust patterns (check before Java/C++) if ( /\b(fn\s+\w+|let\s+mut|impl\s+|pub\s+fn|trait\s+|match\s+\{|&mut\s|&self|Option<|Result<|\.unwrap\(\)|\.expect\(|use\s+std::|use\s+\w+::\{|mod\s+\w+|#\[derive)/i.test(text) ) { console.log('[DEBUG] Inferred as Rust language'); return 'rust'; } // Java/C++ patterns if ( /\b(public|private|protected|static|void|int|String|System\.out|#include|std::)\b/.test( text ) ) { if ( /\bSystem\.out|public\s+class|public\s+static\s+void\s+main/.test( text ) ) { console.log("[DEBUG] Inferred as Java language"); return "java"; } else if (/#include/.test(text) || /std::(cout|cin|endl|string|vector|map|set)/.test(text)) { console.log("[DEBUG] Inferred as C++ language"); return "cpp"; } } // Python patterns (improved version) if ( /\b(def |class |import |from |print\(|if __name__|elif |except:|finally:|with |as |lambda |yield )/m.test( text ) && !/<[^>]*>/.test(text) && // No HTML tags !/\bfunction\b/.test(text) ) { // No JavaScript functions console.log("[DEBUG] Inferred as Python language"); return "python"; } // JavaScript/TypeScript patterns (revised version) if ( /\b(function\s+\w+|const|let|var|class|import|export|=>|\w+\.\w+\()\b/.test( text ) && !/^#!/.test(text.trim()) && !this.isYamlContent(text) ) { // Not YAML console.log("[DEBUG] Inferred as JavaScript language"); return "javascript"; } // HTML patterns (excluding JSX) if ( /<[a-z][^>]*>/.test(text) && // Lowercase tags (JSX components start with uppercase) !/\b(const|let|var|function|import|export|=>)\b/.test(text) ) { // No JS/TS keywords console.log("[DEBUG] Inferred as HTML language"); return "html"; } // CSS patterns (strict validation) if ( /^\s*[.#]?\w+\s*\{|@media|@import|@keyframes/.test(text) || (/\b(margin|padding|display|position|color|background|font-family|font-size|width|height|border|text-align):\s*/.test( text ) && !/\b(const|let|var|function|return|if|for|while)\b/.test(text)) ) { console.log("[DEBUG] Inferred as CSS language"); return "css"; } // JSON patterns if (/^\s*[{[]/.test(text.trim()) && /[}\]]\s*$/.test(text.trim())) { try { JSON.parse(text); console.log("[DEBUG] Inferred as JSON language"); return "json"; } catch { // Ignore JSON parsing errors } } console.log("[DEBUG] Inferred as plaintext language"); return "plaintext"; }, /** * Detailed method for YAML content determination * * @param {string} text - The text content to analyze * @return {boolean} True if content appears to be YAML */ isYamlContent(text) { console.log( "[DEBUG] Starting YAML validation:", text.substring(0, 150) + "..." ); // Exclude diff patterns from YAML detection // Covers: unified diff headers, git diff, /dev/null, hunk headers if ( /^---\s+[ab]\//.test(text.trim()) || /^---\s+\/dev\/null/.test(text.trim()) || /^\+\+\+\s+[ab]\//.test(text.trim()) || /^\+\+\+\s+\/dev\/null/.test(text.trim()) || /^diff --git\s/.test(text.trim()) || /^@@\s+-\d+,?\d*\s+\+\d+,?\d*\s+@@/m.test(text) || this.isContentOnlyDiff(text) ) { console.log('[DEBUG] Excluded diff content from YAML detection'); return false; } // 1. YAML comment patterns if (/^#.*\.(ya?ml|yml)/i.test(text) || /# YAML/.test(text)) { console.log("[DEBUG] Matched YAML comment pattern"); return true; } // 2. Docker Compose specific keywords if ( /^\s*(version|services|volumes|networks|configs|secrets|deploy|build):\s*["']?[\w.-]+["']?\s*$/m.test( text ) ) { console.log("[DEBUG] Matched Docker Compose specific keywords"); return true; } // 3. Typical YAML key:value patterns (colon and space) const yamlKeyValuePattern = /^\s*[a-zA-Z_][a-zA-Z0-9_-]*:\s*(["'].*["']|\d+\.?\d*|true|false|null|\[|\{|\||>|-\s|$)/m; if (yamlKeyValuePattern.test(text)) { console.log("[DEBUG] Matched YAML key:value pattern"); // Additional check to distinguish from JavaScript object notation const hasJsPatterns = /\b(function|const|let|var|class|=>|\(\)|\.prototype)\b/.test(text); if (!hasJsPatterns) { console.log( "[DEBUG] No JavaScript notation found, determined as YAML" ); return true; } } // 4. YAML list syntax (hyphen + space) if (/^\s*-\s+\w+/m.test(text) && !/^\s*-\s*\d+\s*[-+*/]/.test(text)) { console.log("[DEBUG] Matched YAML list syntax"); return true; } // 5. Indent-based hierarchical structure const lines = text.split("\n").filter((line) => line.trim()); let hasIndentedStructure = false; let prevIndent = -1; for (const line of lines.slice(0, 10)) { // Check the first 10 lines if (line.trim().startsWith("#")) continue; // Skip comment lines if (!/:\s/.test(line)) continue; // Skip lines without key:value format const indent = line.length - line.trimStart().length; if (prevIndent >= 0 && indent !== prevIndent && indent > 0) { hasIndentedStructure = true; break; } if (prevIndent < 0) prevIndent = indent; } if (hasIndentedStructure) { console.log("[DEBUG] Matched indent hierarchical structure"); return true; } console.log("[DEBUG] YAML validation: No match"); return false; }, /** * Detect content-only diff (patch without headers) * Only +/- lines without git diff, ---, +++ headers * @param {string} text - The text content to analyze * @return {boolean} True if content appears to be a content-only diff */ isContentOnlyDiff(text) { const lines = text.trim().split('\n'); // Must have at least 2 lines if (lines.length < 2) return false; // Check if we have both + and - lines (not headers) let hasAddLine = false; let hasRemoveLine = false; let hasNonDiffLine = false; for (const line of lines) { // Skip empty lines if (!line.trim()) continue; // Headers are not content-only if (/^(diff --git|---\s|^\+\+\+\s|@@\s+-\d|index\s+[a-f0-9])/.test(line)) { return false; // Has headers, let other patterns handle it } if (/^\+(?!\+)/.test(line)) { hasAddLine = true; } else if (/^-(?!-)/.test(line)) { hasRemoveLine = true; } else if (/^\s/.test(line)) { // Context lines (leading space) are OK } else { hasNonDiffLine = true; } } // Content-only diff needs both + and - lines, minimal non-diff content if (hasAddLine && hasRemoveLine && !hasNonDiffLine) { console.log('[DEBUG] Detected content-only diff pattern'); return true; } return false; }, /** * Extract plain text from existing Shiki styles * * @param {HTMLElement} element - The highlighted element * @return {string} Plain text content */ extractPlainTextFromHighlighted(element) { // Remove all span elements to get text only const clone = element.cloneNode(true); const spans = clone.querySelectorAll("span"); spans.forEach((span) => { // Replace span content with text node const textNode = document.createTextNode(span.textContent); span.parentNode.replaceChild(textNode, span); }); let text = clone.textContent || clone.innerText || ""; // Decode HTML entities text = text .replace(/</g, "<") .replace(/>/g, ">") .replace(/&/g, "&") .replace(/"/g, '"') .replace(/'/g, "'"); console.log( "[DEBUG] Extracted plain text:", text.substring(0, 200) + "..." ); return text; }, /** * Mermaid block detection * * @param {HTMLElement} element - The element to check * @return {boolean} True if element is a Mermaid block */ isMermaidBlock(element) { const className = element.className || ""; // CSS class-based detection (existing) if ( className.includes("language-mermaid") || className.includes("mermaid") ) { return true; } // Content-based detection for all Mermaid diagram types const textContent = (element.textContent || "") .trim() .replace(/\s+/g, " "); // Support all Mermaid diagram types with typo tolerance return ( /^(graph|flowchart)/i.test(textContent) || /^sequenceDiagram/i.test(textContent) || /^stat(e)?Diagram/i.test(textContent) || /^erDiagram/i.test(textContent) || /^gitgraph/i.test(textContent) || /^classDiagram/i.test(textContent) || /^pie/i.test(textContent) || /^gantt/i.test(textContent) || textContent.includes("journey") ); }, }; // Export to global scope window.wpGfmLanguageDetector = LanguageDetector; })(); |