| 1 | import JSZip from "jszip"; |
| 2 | |
| 3 | import { type ThemeMode, type ThemeProperties } from "./themes"; |
| 4 | |
| 5 | // ============ Office Font → Web Font Mapping ============ |
| 6 | |
| 7 | const OFFICE_FONT_MAP: Record<string, string> = { |
| 8 | Calibri: "Inter", |
| 9 | "Calibri Light": "Inter", |
| 10 | Cambria: "Merriweather", |
| 11 | Arial: "Inter", |
| 12 | "Times New Roman": "Lora", |
| 13 | Verdana: "Open Sans", |
| 14 | Georgia: "Source Serif Pro", |
| 15 | "Trebuchet MS": "Montserrat", |
| 16 | Tahoma: "Inter", |
| 17 | "Century Gothic": "Poppins", |
| 18 | Garamond: "Cormorant Garamond", |
| 19 | "Book Antiqua": "Libre Baskerville", |
| 20 | Palatino: "Libre Baskerville", |
| 21 | "Franklin Gothic Medium": "Manrope", |
| 22 | Impact: "Sora", |
| 23 | "Lucida Sans": "Nunito", |
| 24 | }; |
| 25 | |
| 26 | function mapFont(fontName: string): string { |
| 27 | return OFFICE_FONT_MAP[fontName] ?? fontName; |
| 28 | } |
| 29 | |
| 30 | // ============ Color Utilities ============ |
| 31 | |
| 32 | function getLuminance(hex: string): number { |
| 33 | const r = parseInt(hex.slice(1, 3), 16) / 255; |
| 34 | const g = parseInt(hex.slice(3, 5), 16) / 255; |
| 35 | const b = parseInt(hex.slice(5, 7), 16) / 255; |
| 36 | const toLinear = (c: number) => |
| 37 | c <= 0.03928 ? c / 12.92 : ((c + 0.055) / 1.055) ** 2.4; |
| 38 | return 0.2126 * toLinear(r) + 0.7152 * toLinear(g) + 0.0722 * toLinear(b); |
| 39 | } |
| 40 | |
| 41 | function clampHex(n: number): string { |
| 42 | return Math.max(0, Math.min(255, Math.round(n))) |
| 43 | .toString(16) |
| 44 | .padStart(2, "0"); |
| 45 | } |
| 46 | |
| 47 | function lighten(hex: string, amount: number): string { |
| 48 | const r = parseInt(hex.slice(1, 3), 16); |
| 49 | const g = parseInt(hex.slice(3, 5), 16); |
| 50 | const b = parseInt(hex.slice(5, 7), 16); |
| 51 | return `#${clampHex(r + (255 - r) * amount)}${clampHex(g + (255 - g) * amount)}${clampHex(b + (255 - b) * amount)}`; |
| 52 | } |
| 53 | |
| 54 | function colorDistance(a: string, b: string): number { |
| 55 | const ar = parseInt(a.slice(1, 3), 16); |
| 56 | const ag = parseInt(a.slice(3, 5), 16); |
| 57 | const ab = parseInt(a.slice(5, 7), 16); |
| 58 | const br = parseInt(b.slice(1, 3), 16); |
| 59 | const bg = parseInt(b.slice(3, 5), 16); |
| 60 | const bb = parseInt(b.slice(5, 7), 16); |
| 61 | return Math.sqrt((ar - br) ** 2 + (ag - bg) ** 2 + (ab - bb) ** 2); |
| 62 | } |
| 63 | |
| 64 | function darken(hex: string, amount: number): string { |
| 65 | const r = parseInt(hex.slice(1, 3), 16); |
| 66 | const g = parseInt(hex.slice(3, 5), 16); |
| 67 | const b = parseInt(hex.slice(5, 7), 16); |
| 68 | return `#${clampHex(r * (1 - amount))}${clampHex(g * (1 - amount))}${clampHex(b * (1 - amount))}`; |
| 69 | } |
| 70 | |
| 71 | function averageHex(a: string, b: string): string { |
| 72 | const ar = parseInt(a.slice(1, 3), 16); |
| 73 | const ag = parseInt(a.slice(3, 5), 16); |
| 74 | const ab = parseInt(a.slice(5, 7), 16); |
| 75 | const br = parseInt(b.slice(1, 3), 16); |
| 76 | const bg = parseInt(b.slice(3, 5), 16); |
| 77 | const bb = parseInt(b.slice(5, 7), 16); |
| 78 | return `#${clampHex((ar + br) / 2)}${clampHex((ag + bg) / 2)}${clampHex((ab + bb) / 2)}`; |
| 79 | } |
| 80 | |
| 81 | /** Convert hex to HSL [0-360, 0-1, 0-1] */ |
| 82 | function hexToHsl(hex: string): [number, number, number] { |
| 83 | const r = parseInt(hex.slice(1, 3), 16) / 255; |
| 84 | const g = parseInt(hex.slice(3, 5), 16) / 255; |
| 85 | const b = parseInt(hex.slice(5, 7), 16) / 255; |
| 86 | const max = Math.max(r, g, b); |
| 87 | const min = Math.min(r, g, b); |
| 88 | const l = (max + min) / 2; |
| 89 | if (max === min) return [0, 0, l]; |
| 90 | const d = max - min; |
| 91 | const s = l > 0.5 ? d / (2 - max - min) : d / (max + min); |
| 92 | let h = 0; |
| 93 | if (max === r) h = ((g - b) / d + (g < b ? 6 : 0)) / 6; |
| 94 | else if (max === g) h = ((b - r) / d + 2) / 6; |
| 95 | else h = ((r - g) / d + 4) / 6; |
| 96 | return [h * 360, s, l]; |
| 97 | } |
| 98 | |
| 99 | /** Convert HSL to hex */ |
| 100 | function hslToHex(h: number, s: number, l: number): string { |
| 101 | h = ((h % 360) + 360) % 360; |
| 102 | s = Math.max(0, Math.min(1, s)); |
| 103 | l = Math.max(0, Math.min(1, l)); |
| 104 | const hue2rgb = (p: number, q: number, t: number) => { |
| 105 | if (t < 0) t += 1; |
| 106 | if (t > 1) t -= 1; |
| 107 | if (t < 1 / 6) return p + (q - p) * 6 * t; |
| 108 | if (t < 1 / 2) return q; |
| 109 | if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6; |
| 110 | return p; |
| 111 | }; |
| 112 | if (s === 0) { |
| 113 | const v = Math.round(l * 255); |
| 114 | return `#${clampHex(v)}${clampHex(v)}${clampHex(v)}`; |
| 115 | } |
| 116 | const q = l < 0.5 ? l * (1 + s) : l + s - l * s; |
| 117 | const p = 2 * l - q; |
| 118 | const r = Math.round(hue2rgb(p, q, h / 360 + 1 / 3) * 255); |
| 119 | const g = Math.round(hue2rgb(p, q, h / 360) * 255); |
| 120 | const b = Math.round(hue2rgb(p, q, h / 360 - 1 / 3) * 255); |
| 121 | return `#${clampHex(r)}${clampHex(g)}${clampHex(b)}`; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Apply OOXML color modifiers (lumMod, lumOff, tint, shade) to a base hex color. |
| 126 | * Modifier values in OOXML are expressed as 1/1000th percent (e.g., 75000 = 75%). |
| 127 | */ |
| 128 | function applyColorModifiers( |
| 129 | hex: string, |
| 130 | modifiers: { type: string; val: number }[], |
| 131 | ): string { |
| 132 | let [h, s, l] = hexToHsl(hex); |
| 133 | |
| 134 | for (const mod of modifiers) { |
| 135 | const pct = mod.val / 100000; // OOXML uses 100000 = 100% |
| 136 | switch (mod.type) { |
| 137 | case "lumMod": |
| 138 | l = l * pct; |
| 139 | break; |
| 140 | case "lumOff": |
| 141 | l = l + pct; |
| 142 | break; |
| 143 | case "tint": |
| 144 | // Tint: mix towards white |
| 145 | l = l + (1 - l) * pct; |
| 146 | break; |
| 147 | case "shade": |
| 148 | // Shade: mix towards black |
| 149 | l = l * pct; |
| 150 | break; |
| 151 | case "satMod": |
| 152 | s = s * pct; |
| 153 | break; |
| 154 | case "satOff": |
| 155 | s = s + pct; |
| 156 | break; |
| 157 | // alpha is ignored — we don't want transparency |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | return hslToHex(h, s, l); |
| 162 | } |
| 163 | |
| 164 | // ============ XML Utilities ============ |
| 165 | |
| 166 | /** Cache-friendly element search by localName on a single parent's children */ |
| 167 | function findChildByLocalName( |
| 168 | parent: Element | null, |
| 169 | localName: string, |
| 170 | ): Element | null { |
| 171 | if (!parent) return null; |
| 172 | for (let i = 0; i < parent.children.length; i++) { |
| 173 | const child = parent.children[i]; |
| 174 | if (child && child.localName === localName) return child; |
| 175 | } |
| 176 | return null; |
| 177 | } |
| 178 | |
| 179 | /** Deep search by localName — use sparingly on small subtrees */ |
| 180 | function findByLocalName( |
| 181 | root: Document | Element | null, |
| 182 | localName: string, |
| 183 | ): Element | null { |
| 184 | if (!root) return null; |
| 185 | const all = root.getElementsByTagName("*"); |
| 186 | for (let i = 0; i < all.length; i++) { |
| 187 | const el = all[i]; |
| 188 | if (el && el.localName === localName) return el; |
| 189 | } |
| 190 | return null; |
| 191 | } |
| 192 | |
| 193 | /** Get hex color from an OOXML color element (handles srgbClr + sysClr) */ |
| 194 | function getColorFromElement(parent: Element | null): string | null { |
| 195 | if (!parent) return null; |
| 196 | |
| 197 | const srgb = findByLocalName(parent, "srgbClr"); |
| 198 | if (srgb) { |
| 199 | const val = srgb.getAttribute("val"); |
| 200 | if (val) return `#${val.toUpperCase()}`; |
| 201 | } |
| 202 | |
| 203 | const sys = findByLocalName(parent, "sysClr"); |
| 204 | if (sys) { |
| 205 | const lastClr = sys.getAttribute("lastClr"); |
| 206 | if (lastClr) return `#${lastClr.toUpperCase()}`; |
| 207 | } |
| 208 | |
| 209 | return null; |
| 210 | } |
| 211 | |
| 212 | /** Collect OOXML modifier children from a color element (srgbClr or schemeClr) */ |
| 213 | function collectChildModifiers(el: Element): { type: string; val: number }[] { |
| 214 | const modifiers: { type: string; val: number }[] = []; |
| 215 | for (let i = 0; i < el.children.length; i++) { |
| 216 | const child = el.children[i]; |
| 217 | if (!child) continue; |
| 218 | const modVal = child.getAttribute("val"); |
| 219 | if (modVal && child.localName) { |
| 220 | modifiers.push({ type: child.localName, val: parseInt(modVal, 10) }); |
| 221 | } |
| 222 | } |
| 223 | return modifiers; |
| 224 | } |
| 225 | |
| 226 | /** Resolve a color from a solidFill element (handles srgbClr + schemeClr with modifiers) */ |
| 227 | function resolveColorFromFill( |
| 228 | solidFillEl: Element | null, |
| 229 | palette: ThemePalette | null, |
| 230 | clrMap: Record<string, ThemeColorSlot>, |
| 231 | ): string | null { |
| 232 | if (!solidFillEl) return null; |
| 233 | |
| 234 | // Direct srgbClr |
| 235 | const srgb = findChildByLocalName(solidFillEl, "srgbClr"); |
| 236 | if (srgb) { |
| 237 | const val = srgb.getAttribute("val"); |
| 238 | if (val) { |
| 239 | const base = `#${val.toUpperCase()}`; |
| 240 | const modifiers = collectChildModifiers(srgb); |
| 241 | return modifiers.length > 0 ? applyColorModifiers(base, modifiers) : base; |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | // schemeClr (needs palette to resolve) |
| 246 | if (palette) { |
| 247 | const schemeClr = findChildByLocalName(solidFillEl, "schemeClr"); |
| 248 | if (schemeClr) { |
| 249 | const val = schemeClr.getAttribute("val"); |
| 250 | if (val) { |
| 251 | const slot = clrMap[val] ?? (val as ThemeColorSlot); |
| 252 | const baseColor = palette[slot]; |
| 253 | if (baseColor) { |
| 254 | const modifiers = collectChildModifiers(schemeClr); |
| 255 | return modifiers.length > 0 |
| 256 | ? applyColorModifiers(baseColor, modifiers) |
| 257 | : baseColor; |
| 258 | } |
| 259 | } |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | return null; |
| 264 | } |
| 265 | |
| 266 | /** Parse a DOMParser XML string */ |
| 267 | function parseXml(xmlString: string): Document { |
| 268 | return new DOMParser().parseFromString(xmlString, "application/xml"); |
| 269 | } |
| 270 | |
| 271 | // ============ Design Defaults (matches "standard" style) ============ |
| 272 | |
| 273 | const STANDARD_DESIGN = { |
| 274 | borderRadius: { |
| 275 | card: "0.5rem", |
| 276 | slide: "0.5rem", |
| 277 | button: "0.375rem", |
| 278 | }, |
| 279 | transitions: { |
| 280 | default: "all 0.2s ease-in-out", |
| 281 | }, |
| 282 | shadows: { |
| 283 | card: "0 1px 3px rgba(0,0,0,0.05)", |
| 284 | button: "0 1px 2px rgba(0,0,0,0.03)", |
| 285 | slide: "0 2px 4px rgba(0,0,0,0.04)", |
| 286 | }, |
| 287 | } as const; |
| 288 | |
| 289 | // ============ OOXML Theme Palette ============ |
| 290 | |
| 291 | /** The 12 standard OOXML theme color slots */ |
| 292 | type ThemeColorSlot = |
| 293 | | "dk1" |
| 294 | | "lt1" |
| 295 | | "dk2" |
| 296 | | "lt2" |
| 297 | | "accent1" |
| 298 | | "accent2" |
| 299 | | "accent3" |
| 300 | | "accent4" |
| 301 | | "accent5" |
| 302 | | "accent6" |
| 303 | | "hlink" |
| 304 | | "folHlink"; |
| 305 | |
| 306 | const THEME_COLOR_SLOTS: ThemeColorSlot[] = [ |
| 307 | "dk1", |
| 308 | "lt1", |
| 309 | "dk2", |
| 310 | "lt2", |
| 311 | "accent1", |
| 312 | "accent2", |
| 313 | "accent3", |
| 314 | "accent4", |
| 315 | "accent5", |
| 316 | "accent6", |
| 317 | "hlink", |
| 318 | "folHlink", |
| 319 | ]; |
| 320 | |
| 321 | type ThemePalette = Record<ThemeColorSlot, string | null>; |
| 322 | |
| 323 | /** |
| 324 | * clrMap maps logical names (bg1, tx1, bg2, tx2, accent1...) to |
| 325 | * theme palette slots (lt1, dk1, lt2, dk2, accent1...). |
| 326 | * Default Office mapping if no clrMap is found. |
| 327 | */ |
| 328 | const DEFAULT_CLR_MAP: Record<string, ThemeColorSlot> = { |
| 329 | bg1: "lt1", |
| 330 | tx1: "dk1", |
| 331 | bg2: "lt2", |
| 332 | tx2: "dk2", |
| 333 | accent1: "accent1", |
| 334 | accent2: "accent2", |
| 335 | accent3: "accent3", |
| 336 | accent4: "accent4", |
| 337 | accent5: "accent5", |
| 338 | accent6: "accent6", |
| 339 | hlink: "hlink", |
| 340 | folHlink: "folHlink", |
| 341 | }; |
| 342 | |
| 343 | // ============ Step 1: Resolve theme via OOXML relationships ============ |
| 344 | |
| 345 | /** |
| 346 | * Follow the OOXML relationship chain to find the correct theme XML: |
| 347 | * presentation.xml.rels → slideMaster → slideMaster.rels → theme.xml |
| 348 | */ |
| 349 | async function resolveThemeXml(zip: JSZip): Promise<{ |
| 350 | themeXml: string | null; |
| 351 | slideMasterXml: string | null; |
| 352 | }> { |
| 353 | // Read presentation.xml.rels to find slide masters |
| 354 | const presRelsEntry = zip.file("ppt/_rels/presentation.xml.rels"); |
| 355 | if (!presRelsEntry) { |
| 356 | console.log("[PPTX Resolve] No presentation.xml.rels found"); |
| 357 | return { themeXml: null, slideMasterXml: null }; |
| 358 | } |
| 359 | |
| 360 | const presRelsXml = parseXml(await presRelsEntry.async("string")); |
| 361 | const presRels = presRelsXml.getElementsByTagName("Relationship"); |
| 362 | |
| 363 | // Find first slideMaster relationship |
| 364 | let slideMasterPath: string | null = null; |
| 365 | for (let i = 0; i < presRels.length; i++) { |
| 366 | const rel = presRels[i]; |
| 367 | const type = rel?.getAttribute("Type") ?? ""; |
| 368 | if (type.includes("/slideMaster")) { |
| 369 | const target = rel?.getAttribute("Target"); |
| 370 | if (target) { |
| 371 | // Target is relative to ppt/, e.g. "slideMasters/slideMaster1.xml" |
| 372 | slideMasterPath = target.startsWith("ppt/") ? target : `ppt/${target}`; |
| 373 | break; |
| 374 | } |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | if (!slideMasterPath) { |
| 379 | console.log("[PPTX Resolve] No slideMaster relationship found"); |
| 380 | return { themeXml: null, slideMasterXml: null }; |
| 381 | } |
| 382 | |
| 383 | console.log("[PPTX Resolve] Found slideMaster:", slideMasterPath); |
| 384 | |
| 385 | // Read the slide master XML (needed for clrMap) |
| 386 | const smEntry = zip.file(slideMasterPath); |
| 387 | const slideMasterXml = smEntry ? await smEntry.async("string") : null; |
| 388 | |
| 389 | // Read slideMaster .rels to find the theme |
| 390 | const smDir = slideMasterPath.substring(0, slideMasterPath.lastIndexOf("/")); |
| 391 | const smFileName = slideMasterPath.substring( |
| 392 | slideMasterPath.lastIndexOf("/") + 1, |
| 393 | ); |
| 394 | const smRelsPath = `${smDir}/_rels/${smFileName}.rels`; |
| 395 | const smRelsEntry = zip.file(smRelsPath); |
| 396 | |
| 397 | if (!smRelsEntry) { |
| 398 | console.log("[PPTX Resolve] No slideMaster .rels found at:", smRelsPath); |
| 399 | return { themeXml: null, slideMasterXml }; |
| 400 | } |
| 401 | |
| 402 | const smRelsXml = parseXml(await smRelsEntry.async("string")); |
| 403 | const smRels = smRelsXml.getElementsByTagName("Relationship"); |
| 404 | |
| 405 | let themePath: string | null = null; |
| 406 | for (let i = 0; i < smRels.length; i++) { |
| 407 | const rel = smRels[i]; |
| 408 | const type = rel?.getAttribute("Type") ?? ""; |
| 409 | if (type.includes("/theme")) { |
| 410 | const target = rel?.getAttribute("Target"); |
| 411 | if (target) { |
| 412 | // Target is relative to slideMasters/, e.g. "../theme/theme1.xml" |
| 413 | themePath = resolveRelativePath(smDir, target); |
| 414 | break; |
| 415 | } |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | if (!themePath) { |
| 420 | console.log("[PPTX Resolve] No theme relationship in slideMaster .rels"); |
| 421 | return { themeXml: null, slideMasterXml }; |
| 422 | } |
| 423 | |
| 424 | console.log("[PPTX Resolve] Resolved theme path:", themePath); |
| 425 | |
| 426 | const themeEntry = zip.file(themePath); |
| 427 | const themeXml = themeEntry ? await themeEntry.async("string") : null; |
| 428 | |
| 429 | return { themeXml, slideMasterXml }; |
| 430 | } |
| 431 | |
| 432 | /** Resolve a relative path like "../theme/theme1.xml" from a base directory */ |
| 433 | function resolveRelativePath(baseDir: string, relative: string): string { |
| 434 | const parts = baseDir.split("/"); |
| 435 | const relParts = relative.split("/"); |
| 436 | for (const seg of relParts) { |
| 437 | if (seg === "..") parts.pop(); |
| 438 | else if (seg !== ".") parts.push(seg); |
| 439 | } |
| 440 | return parts.join("/"); |
| 441 | } |
| 442 | |
| 443 | // ============ Step 2: Parse clrMap from slide master ============ |
| 444 | |
| 445 | function parseClrMap( |
| 446 | slideMasterXml: string | null, |
| 447 | ): Record<string, ThemeColorSlot> { |
| 448 | if (!slideMasterXml) return { ...DEFAULT_CLR_MAP }; |
| 449 | |
| 450 | const doc = parseXml(slideMasterXml); |
| 451 | const clrMapEl = findByLocalName(doc, "clrMap"); |
| 452 | if (!clrMapEl) { |
| 453 | console.log("[PPTX clrMap] No clrMap element found, using defaults"); |
| 454 | return { ...DEFAULT_CLR_MAP }; |
| 455 | } |
| 456 | |
| 457 | const map: Record<string, ThemeColorSlot> = { ...DEFAULT_CLR_MAP }; |
| 458 | const attrs = clrMapEl.attributes; |
| 459 | for (let i = 0; i < attrs.length; i++) { |
| 460 | const attr = attrs[i]; |
| 461 | if (attr && THEME_COLOR_SLOTS.includes(attr.value as ThemeColorSlot)) { |
| 462 | map[attr.name] = attr.value as ThemeColorSlot; |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | console.log("[PPTX clrMap] Parsed color map:", map); |
| 467 | return map; |
| 468 | } |
| 469 | |
| 470 | // ============ Step 3: Parse theme palette from theme XML ============ |
| 471 | |
| 472 | function parseThemePalette(themeXml: string): { |
| 473 | palette: ThemePalette; |
| 474 | headingFont: string; |
| 475 | bodyFont: string; |
| 476 | } { |
| 477 | const doc = parseXml(themeXml); |
| 478 | const clrScheme = findByLocalName(doc, "clrScheme"); |
| 479 | |
| 480 | const palette: ThemePalette = { |
| 481 | dk1: null, |
| 482 | lt1: null, |
| 483 | dk2: null, |
| 484 | lt2: null, |
| 485 | accent1: null, |
| 486 | accent2: null, |
| 487 | accent3: null, |
| 488 | accent4: null, |
| 489 | accent5: null, |
| 490 | accent6: null, |
| 491 | hlink: null, |
| 492 | folHlink: null, |
| 493 | }; |
| 494 | |
| 495 | for (const slot of THEME_COLOR_SLOTS) { |
| 496 | palette[slot] = getColorFromElement(findChildByLocalName(clrScheme, slot)); |
| 497 | } |
| 498 | |
| 499 | console.log("[PPTX Palette] Raw theme colors:", palette); |
| 500 | |
| 501 | // Extract fonts |
| 502 | const fontScheme = findByLocalName(doc, "fontScheme"); |
| 503 | const majorFont = findByLocalName(fontScheme, "majorFont"); |
| 504 | const minorFont = findByLocalName(fontScheme, "minorFont"); |
| 505 | |
| 506 | const rawHeading = majorFont |
| 507 | ? findByLocalName(majorFont, "latin")?.getAttribute("typeface") |
| 508 | : null; |
| 509 | const rawBody = minorFont |
| 510 | ? findByLocalName(minorFont, "latin")?.getAttribute("typeface") |
| 511 | : null; |
| 512 | const headingFont = mapFont(rawHeading ?? "Inter"); |
| 513 | const bodyFont = mapFont(rawBody ?? "Inter"); |
| 514 | |
| 515 | console.log("[PPTX Palette] Fonts:", { |
| 516 | rawHeading, |
| 517 | rawBody, |
| 518 | mappedHeading: headingFont, |
| 519 | mappedBody: bodyFont, |
| 520 | }); |
| 521 | |
| 522 | return { palette, headingFont, bodyFont }; |
| 523 | } |
| 524 | |
| 525 | // ============ Step 4: Semantic slide content analysis ============ |
| 526 | |
| 527 | interface SlideContentAnalysis { |
| 528 | headingColors: Map<string, number>; |
| 529 | bodyColors: Map<string, number>; |
| 530 | backgroundColors: Map<string, number>; |
| 531 | shapeFillColors: Map<string, number>; |
| 532 | headingFonts: Map<string, number>; |
| 533 | bodyFonts: Map<string, number>; |
| 534 | } |
| 535 | |
| 536 | /** Font size threshold in OOXML hundredths of a point. >= 3000 = heading */ |
| 537 | const HEADING_SIZE_THRESHOLD = 1800; |
| 538 | const BIG_HEADING_SIZE_THRESHOLD = 2500; |
| 539 | |
| 540 | /** |
| 541 | * Scan actual slide content to extract colors by semantic role: |
| 542 | * - heading: text runs with fontSize >= 3000 (30pt) |
| 543 | * - body: text runs with fontSize < 3000 |
| 544 | * - background: slide background fills |
| 545 | * - shapeFill: non-text shape fills (for primary color detection) |
| 546 | */ |
| 547 | async function scanSlideContent( |
| 548 | zip: JSZip, |
| 549 | palette: ThemePalette | null, |
| 550 | clrMap: Record<string, ThemeColorSlot>, |
| 551 | themeHeadingFont: string | null, |
| 552 | themeBodyFont: string | null, |
| 553 | ): Promise<SlideContentAnalysis> { |
| 554 | const analysis: SlideContentAnalysis = { |
| 555 | headingColors: new Map(), |
| 556 | bodyColors: new Map(), |
| 557 | backgroundColors: new Map(), |
| 558 | shapeFillColors: new Map(), |
| 559 | headingFonts: new Map(), |
| 560 | bodyFonts: new Map(), |
| 561 | }; |
| 562 | |
| 563 | const slidePaths = Object.keys(zip.files).filter( |
| 564 | (p) => p.startsWith("ppt/slides/slide") && p.endsWith(".xml"), |
| 565 | ); |
| 566 | |
| 567 | for (const path of slidePaths) { |
| 568 | const entry = zip.file(path); |
| 569 | if (!entry) continue; |
| 570 | const xmlString = await entry.async("string"); |
| 571 | const doc = parseXml(xmlString); |
| 572 | const allElements = doc.getElementsByTagName("*"); |
| 573 | const slideNumberMatch = path.match(/slide(\d+)\.xml$/i); |
| 574 | const slideNumber = slideNumberMatch |
| 575 | ? Math.max(1, parseInt(slideNumberMatch[1]!, 10)) |
| 576 | : 1; |
| 577 | const slideWeight = 1 / Math.sqrt(slideNumber); |
| 578 | const slideHeadingWeights = new Map<string, number>(); |
| 579 | const slideLargeHeadingColors = new Set<string>(); |
| 580 | |
| 581 | // 1. Extract slide background |
| 582 | const bg = findByLocalName(doc, "bg"); |
| 583 | if (bg) { |
| 584 | const bgFill = findByLocalName(bg, "solidFill"); |
| 585 | const bgColor = resolveColorFromFill(bgFill, palette, clrMap); |
| 586 | if (bgColor) { |
| 587 | const upper = bgColor.toUpperCase(); |
| 588 | analysis.backgroundColors.set( |
| 589 | upper, |
| 590 | (analysis.backgroundColors.get(upper) || 0) + 1, |
| 591 | ); |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | // 2. Collect shape fills (spPr > solidFill) for primary color detection |
| 596 | for (let i = 0; i < allElements.length; i++) { |
| 597 | const el = allElements[i]; |
| 598 | if (!el || el.localName !== "spPr") continue; |
| 599 | const fill = findChildByLocalName(el, "solidFill"); |
| 600 | const color = resolveColorFromFill(fill, palette, clrMap); |
| 601 | if (color) { |
| 602 | const upper = color.toUpperCase(); |
| 603 | analysis.shapeFillColors.set( |
| 604 | upper, |
| 605 | (analysis.shapeFillColors.get(upper) || 0) + 1, |
| 606 | ); |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | // 3. Scan text runs — classify as heading or body by font size |
| 611 | for (let i = 0; i < allElements.length; i++) { |
| 612 | const el = allElements[i]; |
| 613 | if (!el || el.localName !== "r") continue; |
| 614 | |
| 615 | // Only count runs with actual text content |
| 616 | const textEl = findChildByLocalName(el, "t"); |
| 617 | if (!textEl || !textEl.textContent?.trim()) continue; |
| 618 | |
| 619 | const rPr = findChildByLocalName(el, "rPr"); |
| 620 | |
| 621 | // --- Resolve font size --- |
| 622 | // Priority: rPr.sz → parent <a:p> pPr.defRPr.sz → default 1800 (18pt body) |
| 623 | let fontSize = rPr ? parseInt(rPr.getAttribute("sz") || "0", 10) : 0; |
| 624 | |
| 625 | if (!fontSize && el.parentElement) { |
| 626 | const pPr = findChildByLocalName(el.parentElement, "pPr"); |
| 627 | if (pPr) { |
| 628 | const defRPr = findChildByLocalName(pPr, "defRPr"); |
| 629 | if (defRPr) { |
| 630 | fontSize = parseInt(defRPr.getAttribute("sz") || "0", 10); |
| 631 | } |
| 632 | } |
| 633 | } |
| 634 | if (!fontSize) fontSize = 1800; // Default 18pt (body) |
| 635 | |
| 636 | // --- Resolve text color --- |
| 637 | // Priority: rPr > solidFill → parent pPr > defRPr > solidFill |
| 638 | let color: string | null = null; |
| 639 | |
| 640 | if (rPr) { |
| 641 | const fill = findChildByLocalName(rPr, "solidFill"); |
| 642 | color = resolveColorFromFill(fill, palette, clrMap); |
| 643 | } |
| 644 | |
| 645 | if (!color && el.parentElement) { |
| 646 | const pPr = findChildByLocalName(el.parentElement, "pPr"); |
| 647 | if (pPr) { |
| 648 | const defRPr = findChildByLocalName(pPr, "defRPr"); |
| 649 | if (defRPr) { |
| 650 | const fill = findChildByLocalName(defRPr, "solidFill"); |
| 651 | color = resolveColorFromFill(fill, palette, clrMap); |
| 652 | } |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | // --- Classify color by size --- |
| 657 | if (color) { |
| 658 | const upper = color.toUpperCase(); |
| 659 | if (fontSize >= HEADING_SIZE_THRESHOLD) { |
| 660 | const fontSizeWeight = Math.max(1, fontSize); |
| 661 | const weighted = slideWeight * fontSizeWeight; |
| 662 | slideHeadingWeights.set( |
| 663 | upper, |
| 664 | (slideHeadingWeights.get(upper) || 0) + weighted, |
| 665 | ); |
| 666 | if (fontSize >= BIG_HEADING_SIZE_THRESHOLD) { |
| 667 | slideLargeHeadingColors.add(upper); |
| 668 | } |
| 669 | } else { |
| 670 | analysis.bodyColors.set( |
| 671 | upper, |
| 672 | (analysis.bodyColors.get(upper) || 0) + 1, |
| 673 | ); |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | // --- Resolve font name --- |
| 678 | // Priority: rPr > latin[@typeface] → parent pPr > defRPr > latin[@typeface] |
| 679 | // Resolve theme references: +mj-* → themeHeadingFont, +mn-* → themeBodyFont |
| 680 | let fontName: string | null = null; |
| 681 | |
| 682 | if (rPr) { |
| 683 | const latin = findChildByLocalName(rPr, "latin"); |
| 684 | const tf = latin?.getAttribute("typeface"); |
| 685 | if (tf) { |
| 686 | if (tf.startsWith("+mj")) fontName = themeHeadingFont; |
| 687 | else if (tf.startsWith("+mn")) fontName = themeBodyFont; |
| 688 | else fontName = tf; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | if (!fontName && el.parentElement) { |
| 693 | const pPr = findChildByLocalName(el.parentElement, "pPr"); |
| 694 | if (pPr) { |
| 695 | const defRPr = findChildByLocalName(pPr, "defRPr"); |
| 696 | if (defRPr) { |
| 697 | const latin = findChildByLocalName(defRPr, "latin"); |
| 698 | const tf = latin?.getAttribute("typeface"); |
| 699 | if (tf) { |
| 700 | if (tf.startsWith("+mj")) fontName = themeHeadingFont; |
| 701 | else if (tf.startsWith("+mn")) fontName = themeBodyFont; |
| 702 | else fontName = tf; |
| 703 | } |
| 704 | } |
| 705 | } |
| 706 | } |
| 707 | |
| 708 | if (fontName) { |
| 709 | const mapped = mapFont(fontName); |
| 710 | if (fontSize >= HEADING_SIZE_THRESHOLD) { |
| 711 | analysis.headingFonts.set( |
| 712 | mapped, |
| 713 | (analysis.headingFonts.get(mapped) || 0) + 1, |
| 714 | ); |
| 715 | } else { |
| 716 | analysis.bodyFonts.set( |
| 717 | mapped, |
| 718 | (analysis.bodyFonts.get(mapped) || 0) + 1, |
| 719 | ); |
| 720 | } |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | if (slideHeadingWeights.size > 0) { |
| 725 | const largeCount = slideLargeHeadingColors.size; |
| 726 | const penaltyFactor = largeCount > 1 ? 1 / largeCount : 1; |
| 727 | for (const [color, weight] of slideHeadingWeights) { |
| 728 | const adjusted = |
| 729 | penaltyFactor !== 1 && slideLargeHeadingColors.has(color) |
| 730 | ? weight * penaltyFactor |
| 731 | : weight; |
| 732 | analysis.headingColors.set( |
| 733 | color, |
| 734 | (analysis.headingColors.get(color) || 0) + adjusted, |
| 735 | ); |
| 736 | } |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | return analysis; |
| 741 | } |
| 742 | |
| 743 | // ============ Helpers ============ |
| 744 | |
| 745 | /** Get the most frequent entry from a frequency map */ |
| 746 | function getTopColor(map: Map<string, number>): string | null { |
| 747 | let top: string | null = null; |
| 748 | let topCount = 0; |
| 749 | for (const [color, count] of map) { |
| 750 | if (count > topCount) { |
| 751 | top = color; |
| 752 | topCount = count; |
| 753 | } |
| 754 | } |
| 755 | return top; |
| 756 | } |
| 757 | |
| 758 | function getTopColorExcluding( |
| 759 | map: Map<string, number>, |
| 760 | exclude: string | null, |
| 761 | ): string | null { |
| 762 | if (!exclude) return getTopColor(map); |
| 763 | let top: string | null = null; |
| 764 | let topCount = 0; |
| 765 | for (const [color, count] of map) { |
| 766 | if (color === exclude) continue; |
| 767 | if (count > topCount) { |
| 768 | top = color; |
| 769 | topCount = count; |
| 770 | } |
| 771 | } |
| 772 | return top; |
| 773 | } |
| 774 | |
| 775 | function logAnalysis(label: string, analysis: SlideContentAnalysis): void { |
| 776 | const sortEntries = (m: Map<string, number>) => |
| 777 | [...m.entries()].sort((a, b) => b[1] - a[1]); |
| 778 | |
| 779 | console.log(`[PPTX ${label}] Slide content analysis:`, { |
| 780 | headingColors: sortEntries(analysis.headingColors) |
| 781 | .slice(0, 10) |
| 782 | .map(([c, n]) => `${c} (×${n})`), |
| 783 | bodyColors: sortEntries(analysis.bodyColors) |
| 784 | .slice(0, 10) |
| 785 | .map(([c, n]) => `${c} (×${n})`), |
| 786 | backgroundColors: sortEntries(analysis.backgroundColors).map( |
| 787 | ([c, n]) => `${c} (×${n})`, |
| 788 | ), |
| 789 | shapeFillColors: sortEntries(analysis.shapeFillColors) |
| 790 | .slice(0, 10) |
| 791 | .map(([c, n]) => `${c} (×${n})`), |
| 792 | headingFonts: sortEntries(analysis.headingFonts) |
| 793 | .slice(0, 5) |
| 794 | .map(([f, n]) => `${f} (×${n})`), |
| 795 | bodyFonts: sortEntries(analysis.bodyFonts) |
| 796 | .slice(0, 5) |
| 797 | .map(([f, n]) => `${f} (×${n})`), |
| 798 | }); |
| 799 | } |
| 800 | |
| 801 | // ============ Build final ThemeProperties (weighted) ============ |
| 802 | |
| 803 | /** |
| 804 | * Build theme using a weighted approach: |
| 805 | * 1. Start with palette-derived initial values |
| 806 | * 2. Override with most-frequent slide-scanned colors for heading, body, background, primary |
| 807 | */ |
| 808 | function buildTheme( |
| 809 | palette: ThemePalette, |
| 810 | clrMap: Record<string, ThemeColorSlot>, |
| 811 | headingFont: string, |
| 812 | bodyFont: string, |
| 813 | themeName: string, |
| 814 | analysis: SlideContentAnalysis, |
| 815 | ): ThemeProperties { |
| 816 | const resolveColor = (logicalName: string): string | null => { |
| 817 | const slot = clrMap[logicalName]; |
| 818 | return slot ? palette[slot] : null; |
| 819 | }; |
| 820 | |
| 821 | // --- Background --- |
| 822 | // Initial: palette bg1. Override: most frequent slide background. |
| 823 | let background = resolveColor("bg1") ?? palette.lt1 ?? "#FFFFFF"; |
| 824 | const topBg = getTopColor(analysis.backgroundColors); |
| 825 | if (topBg) background = topBg; |
| 826 | |
| 827 | const mode: ThemeMode = getLuminance(background) > 0.5 ? "light" : "dark"; |
| 828 | |
| 829 | // --- Body text color --- |
| 830 | // Initial: palette tx1. Override: most frequent body text color from slides. |
| 831 | let text = |
| 832 | resolveColor("tx1") ?? |
| 833 | palette.dk1 ?? |
| 834 | (mode === "light" ? "#1F2937" : "#E5E7EB"); |
| 835 | const topBody = getTopColor(analysis.bodyColors); |
| 836 | if (topBody) text = topBody; |
| 837 | |
| 838 | // --- Heading color --- |
| 839 | // Initial: palette tx2. Override: most frequent heading text color from slides. |
| 840 | let heading = resolveColor("tx2") ?? palette.dk2 ?? text; |
| 841 | const topHeading = getTopColorExcluding(analysis.headingColors, text); |
| 842 | const topHeadingRaw = getTopColor(analysis.headingColors); |
| 843 | if (topHeading) { |
| 844 | heading = topHeading; |
| 845 | } else if (topHeadingRaw) { |
| 846 | heading = topHeadingRaw; |
| 847 | } |
| 848 | |
| 849 | // --- Primary color = same as heading --- |
| 850 | const primary = heading; |
| 851 | |
| 852 | // --- Smart layout & Card background from shape fills --- |
| 853 | // Close to primary/heading → smartLayout, close to background → cardBackground |
| 854 | const CLOSE_THRESHOLD = 120; |
| 855 | let smartLayout: string | null = null; |
| 856 | let cardBackground: string | null = null; |
| 857 | |
| 858 | if (analysis.shapeFillColors.size > 0) { |
| 859 | const sortedFills = [...analysis.shapeFillColors.entries()].sort( |
| 860 | (a, b) => b[1] - a[1], |
| 861 | ); |
| 862 | for (const [fillColor] of sortedFills) { |
| 863 | if ( |
| 864 | !cardBackground && |
| 865 | colorDistance(fillColor, background) < CLOSE_THRESHOLD |
| 866 | ) { |
| 867 | cardBackground = fillColor; |
| 868 | } |
| 869 | if (!smartLayout && colorDistance(fillColor, primary) < CLOSE_THRESHOLD) { |
| 870 | smartLayout = fillColor; |
| 871 | } |
| 872 | if (smartLayout && cardBackground) break; |
| 873 | } |
| 874 | } |
| 875 | |
| 876 | // Fallback: use primary for smartLayout, tone down bg for cardBackground |
| 877 | if (!smartLayout) { |
| 878 | smartLayout = primary; |
| 879 | } |
| 880 | if (!cardBackground) { |
| 881 | cardBackground = |
| 882 | resolveColor("bg2") ?? |
| 883 | palette.lt2 ?? |
| 884 | (mode === "light" ? darken(background, 0.04) : lighten(background, 0.06)); |
| 885 | } |
| 886 | |
| 887 | // Accent (secondary) from palette, with fallback when it clashes with primary |
| 888 | const SECONDARY_OFF_THRESHOLD = 160; |
| 889 | const linkColor = palette[clrMap.hlink ?? "hlink"]; |
| 890 | let accent = palette[clrMap.accent2 ?? "accent2"] ?? primary; |
| 891 | if ( |
| 892 | accent && |
| 893 | linkColor && |
| 894 | colorDistance(accent, primary) > SECONDARY_OFF_THRESHOLD |
| 895 | ) { |
| 896 | accent = averageHex(primary, linkColor); |
| 897 | } |
| 898 | |
| 899 | // --- Fonts --- |
| 900 | // Initial: theme XML fonts. Override: most frequent slide fonts. |
| 901 | let finalHeadingFont = headingFont; |
| 902 | const topHeadingFont = getTopColor(analysis.headingFonts); |
| 903 | if (topHeadingFont) finalHeadingFont = topHeadingFont; |
| 904 | |
| 905 | let finalBodyFont = bodyFont; |
| 906 | const topBodyFont = getTopColor(analysis.bodyFonts); |
| 907 | if (topBodyFont) finalBodyFont = topBodyFont; |
| 908 | |
| 909 | console.log("[PPTX Build] Weighted theme result:", { |
| 910 | background, |
| 911 | text, |
| 912 | primary, |
| 913 | accent, |
| 914 | heading, |
| 915 | cardBackground, |
| 916 | smartLayout, |
| 917 | mode, |
| 918 | headingFont: finalHeadingFont, |
| 919 | bodyFont: finalBodyFont, |
| 920 | overrides: { |
| 921 | background: topBg ? `overridden → ${topBg}` : "from palette", |
| 922 | text: topBody ? `overridden → ${topBody}` : "from palette", |
| 923 | heading: topHeading ? `overridden → ${topHeading}` : "from palette", |
| 924 | primary: "= heading", |
| 925 | smartLayout: |
| 926 | analysis.shapeFillColors.size > 0 |
| 927 | ? `from shape fills (${analysis.shapeFillColors.size} unique)` |
| 928 | : "= primary (no shape fills)", |
| 929 | headingFont: topHeadingFont |
| 930 | ? `overridden → ${topHeadingFont}` |
| 931 | : "from theme XML", |
| 932 | bodyFont: topBodyFont ? `overridden → ${topBodyFont}` : "from theme XML", |
| 933 | }, |
| 934 | }); |
| 935 | |
| 936 | return { |
| 937 | name: themeName, |
| 938 | description: "Imported from PPTX", |
| 939 | mode, |
| 940 | colors: { |
| 941 | primary, |
| 942 | accent, |
| 943 | background, |
| 944 | text, |
| 945 | heading, |
| 946 | smartLayout, |
| 947 | cardBackground, |
| 948 | }, |
| 949 | fonts: { heading: finalHeadingFont, body: finalBodyFont }, |
| 950 | ...STANDARD_DESIGN, |
| 951 | }; |
| 952 | } |
| 953 | |
| 954 | // ============ Fallback: build theme from slide analysis only (no palette) ============ |
| 955 | |
| 956 | function buildThemeFromSlideAnalysis( |
| 957 | analysis: SlideContentAnalysis, |
| 958 | themeName: string, |
| 959 | ): ThemeProperties { |
| 960 | const topBg = getTopColor(analysis.backgroundColors); |
| 961 | const background = topBg ?? "#FFFFFF"; |
| 962 | const mode: ThemeMode = getLuminance(background) > 0.5 ? "light" : "dark"; |
| 963 | |
| 964 | const topBody = getTopColor(analysis.bodyColors); |
| 965 | const text = topBody ?? (mode === "light" ? "#1F2937" : "#E5E7EB"); |
| 966 | |
| 967 | const topHeading = getTopColor(analysis.headingColors); |
| 968 | const heading = |
| 969 | getTopColorExcluding(analysis.headingColors, text) ?? topHeading ?? text; |
| 970 | |
| 971 | // Primary = same as heading |
| 972 | const primary = heading; |
| 973 | |
| 974 | // Smart layout & card background from shape fills |
| 975 | const CLOSE_THRESHOLD = 120; |
| 976 | let smartLayout: string | null = null; |
| 977 | let cardBackground: string | null = null; |
| 978 | |
| 979 | if (analysis.shapeFillColors.size > 0) { |
| 980 | const sortedFills = [...analysis.shapeFillColors.entries()].sort( |
| 981 | (a, b) => b[1] - a[1], |
| 982 | ); |
| 983 | for (const [fillColor] of sortedFills) { |
| 984 | if ( |
| 985 | !cardBackground && |
| 986 | colorDistance(fillColor, background) < CLOSE_THRESHOLD |
| 987 | ) { |
| 988 | cardBackground = fillColor; |
| 989 | } |
| 990 | if (!smartLayout && colorDistance(fillColor, primary) < CLOSE_THRESHOLD) { |
| 991 | smartLayout = fillColor; |
| 992 | } |
| 993 | if (smartLayout && cardBackground) break; |
| 994 | } |
| 995 | } |
| 996 | |
| 997 | if (!smartLayout) { |
| 998 | smartLayout = primary; |
| 999 | } |
| 1000 | if (!cardBackground) { |
| 1001 | cardBackground = |
| 1002 | mode === "light" ? darken(background, 0.04) : lighten(background, 0.06); |
| 1003 | } |
| 1004 | |
| 1005 | const accent = primary; |
| 1006 | |
| 1007 | // Fonts from slide content |
| 1008 | const headingFont = getTopColor(analysis.headingFonts) ?? "Inter"; |
| 1009 | const bodyFont = getTopColor(analysis.bodyFonts) ?? "Inter"; |
| 1010 | |
| 1011 | console.log("[PPTX Fallback] Theme from slide analysis:", { |
| 1012 | background, |
| 1013 | text, |
| 1014 | primary, |
| 1015 | heading, |
| 1016 | mode, |
| 1017 | headingFont, |
| 1018 | bodyFont, |
| 1019 | }); |
| 1020 | |
| 1021 | return { |
| 1022 | name: themeName, |
| 1023 | description: "Imported from PPTX", |
| 1024 | mode, |
| 1025 | colors: { |
| 1026 | primary, |
| 1027 | accent, |
| 1028 | background, |
| 1029 | text, |
| 1030 | heading, |
| 1031 | smartLayout, |
| 1032 | cardBackground, |
| 1033 | }, |
| 1034 | fonts: { heading: headingFont, body: bodyFont }, |
| 1035 | ...STANDARD_DESIGN, |
| 1036 | }; |
| 1037 | } |
| 1038 | |
| 1039 | // ============ Main Entry Point ============ |
| 1040 | |
| 1041 | export async function extractThemeFromPptx( |
| 1042 | file: File, |
| 1043 | ): Promise<ThemeProperties> { |
| 1044 | const zip = await JSZip.loadAsync(file); |
| 1045 | |
| 1046 | const themeName = `Imported: ${file.name.replace(/\.pptx$/i, "").replace(/[_-]/g, " ")}`; |
| 1047 | |
| 1048 | const allFiles = Object.keys(zip.files); |
| 1049 | console.log( |
| 1050 | "[PPTX Import] Files in archive:", |
| 1051 | allFiles.filter((f) => f.startsWith("ppt/")), |
| 1052 | ); |
| 1053 | |
| 1054 | // Step 1: Resolve theme XML via OOXML relationship chain |
| 1055 | const { themeXml, slideMasterXml } = await resolveThemeXml(zip); |
| 1056 | |
| 1057 | if (themeXml) { |
| 1058 | // Step 2: Parse clrMap from slide master |
| 1059 | const clrMap = parseClrMap(slideMasterXml); |
| 1060 | |
| 1061 | // Step 3: Parse theme palette |
| 1062 | const { palette, headingFont, bodyFont } = parseThemePalette(themeXml); |
| 1063 | |
| 1064 | // Step 4: Scan slide content for semantic color + font analysis |
| 1065 | const analysis = await scanSlideContent( |
| 1066 | zip, |
| 1067 | palette, |
| 1068 | clrMap, |
| 1069 | headingFont, |
| 1070 | bodyFont, |
| 1071 | ); |
| 1072 | logAnalysis("Import", analysis); |
| 1073 | |
| 1074 | // Step 5: Build theme using weighted approach (palette + slide content) |
| 1075 | return buildTheme( |
| 1076 | palette, |
| 1077 | clrMap, |
| 1078 | headingFont, |
| 1079 | bodyFont, |
| 1080 | themeName, |
| 1081 | analysis, |
| 1082 | ); |
| 1083 | } |
| 1084 | |
| 1085 | // Fallback: try any theme file directly (no relationship chain) |
| 1086 | const themeFiles = allFiles.filter( |
| 1087 | (p) => p.startsWith("ppt/theme/") && p.endsWith(".xml"), |
| 1088 | ); |
| 1089 | if (themeFiles[0]) { |
| 1090 | console.log( |
| 1091 | "[PPTX Import] Fallback: using theme file directly:", |
| 1092 | themeFiles[0], |
| 1093 | ); |
| 1094 | const entry = zip.file(themeFiles[0]); |
| 1095 | if (entry) { |
| 1096 | const xmlString = await entry.async("string"); |
| 1097 | const { palette, headingFont, bodyFont } = parseThemePalette(xmlString); |
| 1098 | |
| 1099 | // Still scan slides for weighted analysis |
| 1100 | const analysis = await scanSlideContent( |
| 1101 | zip, |
| 1102 | palette, |
| 1103 | DEFAULT_CLR_MAP, |
| 1104 | headingFont, |
| 1105 | bodyFont, |
| 1106 | ); |
| 1107 | logAnalysis("Fallback", analysis); |
| 1108 | |
| 1109 | return buildTheme( |
| 1110 | palette, |
| 1111 | DEFAULT_CLR_MAP, |
| 1112 | headingFont, |
| 1113 | bodyFont, |
| 1114 | themeName, |
| 1115 | analysis, |
| 1116 | ); |
| 1117 | } |
| 1118 | } |
| 1119 | |
| 1120 | // Last resort: slide content scan only (no palette available) |
| 1121 | console.log( |
| 1122 | "[PPTX Import] No theme XML found, falling back to slide content scan", |
| 1123 | ); |
| 1124 | const analysis = await scanSlideContent( |
| 1125 | zip, |
| 1126 | null, |
| 1127 | DEFAULT_CLR_MAP, |
| 1128 | null, |
| 1129 | null, |
| 1130 | ); |
| 1131 | logAnalysis("NoTheme", analysis); |
| 1132 | return buildThemeFromSlideAnalysis(analysis, themeName); |
| 1133 | } |
| 1134 |