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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 | /** * GFMR Mermaid Lightbox Module * Click-to-expand functionality for Mermaid diagrams * * @package WpGfmRenderer * @since 1.11.0 */ (function(global) { 'use strict'; // Prevent duplicate initialization if (global.gfmrMermaidLightboxInitialized) return; global.gfmrMermaidLightboxInitialized = true; class GFMRMermaidLightbox { constructor() { this.modal = null; this.currentDiagram = null; this.currentZoom = 1.0; this.zoomConfig = { min: 0.25, max: 4.0, step: 0.25 }; this.panOffset = { x: 0, y: 0 }; this.isDragging = false; this.dragStart = { x: 0, y: 0 }; this.previousActiveElement = null; this.focusableElements = null; this.abortController = null; this.touchEndTime = 0; } init() { this.abortController = new AbortController(); this.createModal(); this.bindGlobalEvents(); console.log('[GFMR Lightbox] Initialized'); } destroy() { this.abortController?.abort(); this.modal?.remove(); global.gfmrMermaidLightboxInitialized = false; } createModal() { if (document.querySelector('.gfmr-mermaid-zoom-modal')) { this.modal = document.querySelector('.gfmr-mermaid-zoom-modal'); return; } const modal = document.createElement('div'); modal.className = 'gfmr-mermaid-zoom-modal'; modal.setAttribute('role', 'dialog'); modal.setAttribute('aria-modal', 'true'); modal.setAttribute('aria-labelledby', 'gfmr-lightbox-title'); modal.setAttribute('aria-describedby', 'gfmr-lightbox-instructions'); modal.innerHTML = ` <div class="modal-overlay" data-action="close"></div> <div class="modal-dialog"> <div class="modal-header"> <h3 class="modal-title" id="gfmr-lightbox-title">Diagram</h3> <div class="modal-controls"> <button type="button" class="zoom-btn" data-action="zoom-out" aria-label="Zoom out">−</button> <button type="button" class="zoom-btn" data-action="zoom-reset" aria-label="Reset zoom">⌂</button> <button type="button" class="zoom-btn" data-action="zoom-in" aria-label="Zoom in">+</button> <button type="button" class="close-btn" data-action="close" aria-label="Close">×</button> </div> </div> <div class="modal-content"> <div class="diagram-container"> <div class="zoom-wrapper"></div> </div> </div> <div class="modal-footer"> <div class="zoom-info"> <span>Zoom:</span> <span class="zoom-level">100%</span> </div> <span class="instructions" id="gfmr-lightbox-instructions"> Scroll to zoom, drag to pan </span> </div> </div> `; document.body.appendChild(modal); this.modal = modal; this.bindModalEvents(); } bindGlobalEvents() { const signal = this.abortController.signal; document.addEventListener('keydown', (e) => { if (!this.modal?.classList.contains('active')) return; this.handleKeydown(e); }, { signal }); } bindModalEvents() { // Modal control buttons this.modal.addEventListener('click', (e) => { const action = e.target.dataset.action; if (action === 'close') this.close(); if (action === 'zoom-in') this.zoomIn(); if (action === 'zoom-out') this.zoomOut(); if (action === 'zoom-reset') this.zoomReset(); }); const container = this.modal.querySelector('.diagram-container'); // Wheel zoom with throttling this.throttledZoom = this.throttle((delta) => { this.setZoom(this.currentZoom + delta); }, 50); container.addEventListener('wheel', (e) => { e.preventDefault(); const delta = e.deltaY > 0 ? -this.zoomConfig.step : this.zoomConfig.step; this.throttledZoom(delta); }); // Drag pan (mouse) container.addEventListener('mousedown', (e) => this.startDrag(e)); container.addEventListener('mousemove', (e) => this.drag(e)); container.addEventListener('mouseup', () => this.endDrag()); container.addEventListener('mouseleave', () => this.endDrag()); // Drag pan (touch) container.addEventListener('touchstart', (e) => this.startDrag(e), { passive: true }); container.addEventListener('touchmove', (e) => { e.preventDefault(); this.drag(e); }, { passive: false }); container.addEventListener('touchend', () => this.endDrag()); } handleKeydown(e) { switch (e.key) { case 'Escape': this.close(); break; case 'Tab': this.handleTabKey(e); break; case '+': case '=': e.preventDefault(); this.zoomIn(); break; case '-': e.preventDefault(); this.zoomOut(); break; case '0': e.preventDefault(); this.zoomReset(); break; } } open(diagramElement) { const svg = diagramElement.querySelector('svg'); if (!svg) return; this.previousActiveElement = document.activeElement; // Clone SVG with deep copy const clonedSvg = svg.cloneNode(true); // Preserve SVG ID to maintain CSS selector matching // Change ID to avoid conflicts with original SVG if (clonedSvg.id) { const originalId = clonedSvg.id; const newId = originalId + '-lightbox-' + Date.now(); clonedSvg.id = newId; // Update ID selectors in <style> tags const styleElements = clonedSvg.querySelectorAll('style'); styleElements.forEach(style => { // Replace #originalId with #newId in CSS selectors style.textContent = style.textContent.replace( new RegExp(`#${originalId}\\b`, 'g'), `#${newId}` ); }); } const wrapper = this.modal.querySelector('.zoom-wrapper'); wrapper.innerHTML = ''; wrapper.appendChild(clonedSvg); // Reset zoom/pan this.currentZoom = 1.0; this.panOffset = { x: 0, y: 0 }; this.updateTransform(); this.updateZoomLevel(); // Set diagram type const diagramType = this.detectDiagramType(diagramElement); this.modal.querySelector('.modal-title').textContent = diagramType; // Show modal this.modal.classList.add('active'); document.body.classList.add('gfmr-modal-open'); // Update trigger element aria-expanded diagramElement.closest('[aria-haspopup="dialog"]')?.setAttribute('aria-expanded', 'true'); // Focus management this.setupFocusTrap(); this.modal.querySelector('.close-btn').focus(); this.currentDiagram = diagramElement; } close() { this.modal.classList.remove('active'); document.body.classList.remove('gfmr-modal-open'); // Clear SVG clone (memory cleanup) const wrapper = this.modal.querySelector('.zoom-wrapper'); wrapper.innerHTML = ''; // Update trigger element aria-expanded this.currentDiagram?.closest('[aria-haspopup="dialog"]')?.setAttribute('aria-expanded', 'false'); // Restore focus (check element still exists in DOM) if (this.previousActiveElement?.isConnected) { this.previousActiveElement.focus(); } this.previousActiveElement = null; this.currentDiagram = null; } // Zoom methods zoomIn() { this.setZoom(this.currentZoom + this.zoomConfig.step); } zoomOut() { this.setZoom(this.currentZoom - this.zoomConfig.step); } zoomReset() { this.currentZoom = 1.0; this.panOffset = { x: 0, y: 0 }; this.updateTransform(); this.updateZoomLevel(); } setZoom(newZoom) { this.currentZoom = Math.max( this.zoomConfig.min, Math.min(this.zoomConfig.max, newZoom) ); this.updateTransform(); this.updateZoomLevel(); } updateTransform() { const wrapper = this.modal.querySelector('.zoom-wrapper'); wrapper.style.transform = `translate(${this.panOffset.x}px, ${this.panOffset.y}px) scale(${this.currentZoom})`; } updateZoomLevel() { const percent = Math.round(this.currentZoom * 100); this.modal.querySelector('.zoom-level').textContent = `${percent}%`; } // Drag methods startDrag(e) { this.isDragging = true; const clientX = e.type.includes('touch') ? e.touches[0].clientX : e.clientX; const clientY = e.type.includes('touch') ? e.touches[0].clientY : e.clientY; this.dragStart = { x: clientX - this.panOffset.x, y: clientY - this.panOffset.y }; } drag(e) { if (!this.isDragging) return; const clientX = e.type.includes('touch') ? e.touches[0].clientX : e.clientX; const clientY = e.type.includes('touch') ? e.touches[0].clientY : e.clientY; this.panOffset.x = clientX - this.dragStart.x; this.panOffset.y = clientY - this.dragStart.y; this.updateTransform(); } endDrag() { this.isDragging = false; } // Focus management setupFocusTrap() { this.focusableElements = this.modal.querySelectorAll( 'button:not([disabled]), [href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex="-1"])' ); } handleTabKey(e) { if (!this.focusableElements || this.focusableElements.length === 0) return; const firstElement = this.focusableElements[0]; const lastElement = this.focusableElements[this.focusableElements.length - 1]; if (e.shiftKey && document.activeElement === firstElement) { e.preventDefault(); lastElement.focus(); } else if (!e.shiftKey && document.activeElement === lastElement) { e.preventDefault(); firstElement.focus(); } } // Utilities detectDiagramType(element) { const source = element.querySelector('.mermaid-source')?.textContent || ''; if (source.includes('flowchart') || source.includes('graph')) return 'Flowchart'; if (source.includes('sequenceDiagram')) return 'Sequence Diagram'; if (source.includes('classDiagram')) return 'Class Diagram'; if (source.includes('stateDiagram')) return 'State Diagram'; if (source.includes('erDiagram')) return 'ER Diagram'; if (source.includes('gantt')) return 'Gantt Chart'; if (source.includes('pie')) return 'Pie Chart'; if (source.includes('gitGraph')) return 'Git Graph'; if (source.includes('journey')) return 'User Journey'; return 'Diagram'; } throttle(func, limit) { let inThrottle; return (...args) => { if (!inThrottle) { func.apply(this, args); inThrottle = true; setTimeout(() => inThrottle = false, limit); } }; } } // Create instance and expose in wpGfm namespace const lightbox = new GFMRMermaidLightbox(); if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', () => lightbox.init()); } else { lightbox.init(); } // Integrate with wpGfm namespace to reduce collision risk global.wpGfm = global.wpGfm || {}; global.wpGfm.lightbox = lightbox; })(typeof window !== 'undefined' ? window : this); |