implement pdfium wasm compling

package.json

@@ -3,20 +3,31 @@
   "private": false,
   "version": "0.24.0",
   "workspaces": [
+    "packages/pdfium",
     "packages/models",
     "packages/engines",
     "packages/react"
   ],
   "devDependencies": {
-    "@parcel/packager-ts": "^2.10.3",
-    "@parcel/transformer-typescript-types": "^2.10.3",
-    "@typescript-eslint/eslint-plugin": "^6.18.1",
-    "@typescript-eslint/parser": "^6.18.1",
+    "@parcel/packager-ts": "^2.12.0",
+    "@parcel/transformer-typescript-types": "^2.12.0",
+    "@typescript-eslint/eslint-plugin": "^7.9.0",
+    "@typescript-eslint/parser": "^7.9.0",
+    "buffer": "^6.0.3",
+    "crypto-browserify": "^3.12.0",
     "eslint": "^8.56.0",
-    "husky": "^8.0.3",
-    "prettier": "^3.1.0",
-    "typedoc": "^0.25.4",
-    "typescript": "^5.3.3"
+    "events": "^3.3.0",
+    "husky": "^9.0.11",
+    "path-browserify": "^1.0.1",
+    "prettier": "^3.2.5",
+    "process": "^0.11.10",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "stream-browserify": "^3.0.0",
+    "string_decoder": "^1.3.0",
+    "typedoc": "^0.25.13",
+    "typescript": "^5.4.5",
+    "vm-browserify": "^1.1.2"
   },
   "scripts": {
     "doc": "typedoc",

packages/engines/package.json

@@ -54,21 +54,18 @@
   },
   "homepage": "https://github.com/jichang/unionpdf#readme",
   "devDependencies": {
-    "@parcel/packager-ts": "^2.10.3",
-    "@parcel/transformer-typescript-types": "^2.10.3",
-    "@parcel/watcher": "^2.3.0",
-    "@types/jest": "^29.5.10",
+    "@types/jest": "^29.5.12",
     "cpy-cli": "^5.0.0",
     "crypto-browserify": "^3.12.0",
     "del-cli": "^5.1.0",
     "events": "^3.3.0",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",
-    "parcel": "^2.10.3",
+    "parcel": "^2.12.0",
     "path-browserify": "^1.0.1",
     "stream-browserify": "^3.0.0",
-    "ts-jest": "^29.1.1",
-    "typescript": "~5.3.2"
+    "ts-jest": "^29.1.2",
+    "typescript": "^5.4.5"
   },
   "dependencies": {
     "@unionpdf/models": "^0.24.0",

packages/engines/src/webworker/runner.ts

@@ -33,17 +33,15 @@ export type PdfEngineMethodReturnType<P extends PdfEngineMethodName> = Readonly<
  *
  * @public
  */
-export type TaskResolveValueType<T> = T extends Task<infer R, infer U>
-  ? R
-  : never;
+export type TaskResolveValueType<T> =
+  T extends Task<infer R, infer U> ? R : never;
 /**
  * Type of task rejected error
  *
  * @public
  */
-export type TaskRejectErrorType<T> = T extends Task<infer R, infer U>
-  ? U
-  : never;
+export type TaskRejectErrorType<T> =
+  T extends Task<infer R, infer U> ? U : never;
 
 /**
  * Request body that represent method calls of PdfEngine, it contains the
@@ -59,12 +57,10 @@ export type PdfEngineMethodRequestBody = {
 /**
  * Type that represent the result of executing task
  */
-export type TaskResultType<T extends Task<any, any>> = T extends Task<
-  infer R,
-  infer E
->
-  ? { type: 'resolve'; result: R } | { type: 'reject'; error: E }
-  : never;
+export type TaskResultType<T extends Task<any, any>> =
+  T extends Task<infer R, infer E>
+    ? { type: 'resolve'; result: R } | { type: 'reject'; error: E }
+    : never;
 /**
  * Response body that represent return value of PdfEngine
  */

packages/models/package.json

@@ -41,16 +41,16 @@
   },
   "homepage": "https://github.com/jichang/unionpdf#readme",
   "devDependencies": {
-    "@parcel/packager-ts": "^2.10.3",
-    "@parcel/transformer-typescript-types": "^2.10.3",
-    "@parcel/watcher": "^2.3.0",
-    "@types/jest": "^29.5.10",
+    "@types/jest": "^29.5.12",
+    "@types/node": "^20.12.12",
+    "cpy-cli": "^5.0.0",
     "del-cli": "^5.1.0",
     "jest": "^29.7.0",
+    "jest-canvas-mock": "^2.5.2",
     "jest-environment-jsdom": "^29.7.0",
-    "parcel": "^2.10.3",
-    "ts-jest": "^29.1.1",
-    "typescript": "~5.3.2"
+    "parcel": "^2.12.0",
+    "ts-jest": "^29.1.2",
+    "typescript": "^5.4.5"
   },
   "overrides": {
     "lmdb": "2.6.0"

packages/models/tsconfig.json

@@ -93,7 +93,8 @@
     // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
     /* Completeness */
     // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
-    "skipLibCheck": true /* Skip type checking all .d.ts files. */
+    "skipLibCheck": true /* Skip type checking all .d.ts files. */,
+    "types": ["node", "jest"]
   },
   "include": ["src/**/*", "demo/**/*"],
   "exclude": ["dist/**/*"]

packages/pdfium/.gitignore

@@ -1 +1,2 @@
-docker
+docker
+dist

packages/pdfium/Dockerfile

@@ -31,8 +31,6 @@ RUN bash -x ./pdfium/build/install-build-deps.sh
 
 FROM pdfium-src AS pdfium-patch
 COPY build/patch/BUILD.gn /build/pdfium/BUILD.gn
-COPY build/patch/build/compiler/BUILD.gn /build/pdfium/build/compiler/BUILD.gn
-COPY build/patch/build/config/wasm/BUILD.gn /build/pdfium/build/config/wasm/BUILD.gn
 COPY build/patch/build/config/BUILDCONFIG.gn /build/pdfium/build/config/BUILDCONFIG.gn
 COPY build/patch/build/toolchain/wasm/BUILD.gn /build/pdfium/build/toolchain/wasm/BUILD.gn
 COPY build/patch/core/fxge/BUILD.gn /build/pdfium/core/fxge/BUILD.gn
@@ -42,4 +40,10 @@ WORKDIR /build/pdfium
 RUN gn gen out/prod --args='use_goma=false is_debug=false treat_warnings_as_errors=false pdf_use_skia=false pdf_enable_xfa=false pdf_enable_v8=false is_component_build=false clang_use_chrome_plugins=false pdf_is_standalone=true use_debug_fission=false use_custom_libcxx=false use_sysroot=false pdf_is_complete_lib=true pdf_use_partition_alloc=false is_clang=false symbol_level=0'
 RUN echo 'target_os="wasm"' >> out/prod/args.gn
 RUN echo 'target_cpu="wasm"' >> out/prod/args.gn
-RUN ninja -C out/prod pdfium
+RUN ninja -C out/prod pdfium -v
+
+FROM pdfium-compile AS pdfium-wasm
+RUN mkdir /build/out
+COPY build/code/cpp/wasm.cpp /build/out
+WORKDIR /build/out
+RUN em++ wasm.cpp /build/pdfium/out/prod/obj/libpdfium.a -O2 -sEXPORT_ES6=1 -sENVIRONMENT=worker -sWASM_BIGINT -sMODULARIZE=1 -sWASM=1 -sALLOW_MEMORY_GROWTH=1 -sEXPORT_NAME=createPdfium -sUSE_ZLIB=1 -sUSE_LIBJPEG=1 -sASSERTIONS=1 -I/build/pdfium/public -L/build/pdfium/out/prod/obj -std=c++11 -Wall --no-entry -o ./pdfium.js

packages/pdfium/Makefile

@@ -6,4 +6,4 @@ clean:
 .PHONY: build
 build:
 	make clean
-	docker buildx build -o ./docker .
+	docker buildx build -o docker .

packages/pdfium/build/code/cpp/wasm.cpp

@@ -0,0 +1,27 @@
+#include "fpdfview.h"
+#include <emscripten.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    EMSCRIPTEN_KEEPALIVE void PDFium_Init();
+
+#ifdef __cplusplus
+}
+#endif
+
+void PDFium_Init()
+{
+    // https://source.chromium.org/chromium/chromium/src/+/master:third_party/pdfium/samples/pdfium_test.cc;l=1172
+
+    FPDF_LIBRARY_CONFIG config;
+    config.version = 3;
+    config.m_pUserFontPaths = nullptr;
+    config.m_pIsolate = nullptr;
+    config.m_v8EmbedderSlot = 0;
+    config.m_pPlatform = nullptr;
+
+    FPDF_InitLibraryWithConfig(&config);
+}