Simplify initialization of static class properties in the worker-thread

Now that we no longer depend on the old Babel version in SystemJS we can remove the `static get ...` work-arounds used to define constants, which leads to slightly more compact code.

src/core/evaluator.js

@@ -182,13 +182,9 @@ function incrementCachedImageMaskCount(data) {
 
 // Trying to minimize Date.now() usage and check every 100 time.
 class TimeSlotManager {
-  static get TIME_SLOT_DURATION_MS() {
-    return shadow(this, "TIME_SLOT_DURATION_MS", 20);
-  }
+  static TIME_SLOT_DURATION_MS = 20;
 
-  static get CHECK_TIME_EVERY() {
-    return shadow(this, "CHECK_TIME_EVERY", 100);
-  }
+  static CHECK_TIME_EVERY = 100;
 
   constructor() {
     this.reset();
@@ -4838,9 +4834,7 @@ class EvaluatorPreprocessor {
     return shadow(this, "opMap", getOPMap());
   }
 
-  static get MAX_INVALID_PATH_OPS() {
-    return shadow(this, "MAX_INVALID_PATH_OPS", 10);
-  }
+  static MAX_INVALID_PATH_OPS = 10;
 
   constructor(stream, xref, stateManager = new StateManager()) {
     // TODO(mduan): pass array of knownCommands rather than this.opMap

src/core/function.js

@@ -513,9 +513,7 @@ function isPDFFunction(v) {
 }
 
 class PostScriptStack {
-  static get MAX_STACK_SIZE() {
-    return shadow(this, "MAX_STACK_SIZE", 100);
-  }
+  static MAX_STACK_SIZE = 100;
 
   constructor(initialStack) {
     this.stack = initialStack ? Array.from(initialStack) : [];

src/core/image_utils.js

@@ -16,7 +16,6 @@
 import {
   assert,
   MAX_IMAGE_SIZE_TO_CACHE,
-  shadow,
   unreachable,
   warn,
 } from "../shared/util.js";
@@ -173,17 +172,11 @@ class RegionalImageCache extends BaseLocalCache {
 }
 
 class GlobalImageCache {
-  static get NUM_PAGES_THRESHOLD() {
-    return shadow(this, "NUM_PAGES_THRESHOLD", 2);
-  }
+  static NUM_PAGES_THRESHOLD = 2;
 
-  static get MIN_IMAGES_TO_CACHE() {
-    return shadow(this, "MIN_IMAGES_TO_CACHE", 10);
-  }
+  static MIN_IMAGES_TO_CACHE = 10;
 
-  static get MAX_BYTE_SIZE() {
-    return shadow(this, "MAX_BYTE_SIZE", 5 * MAX_IMAGE_SIZE_TO_CACHE);
-  }
+  static MAX_BYTE_SIZE = 5 * MAX_IMAGE_SIZE_TO_CACHE;
 
   constructor() {
     if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {

src/core/operator_list.js

@@ -13,13 +13,7 @@
  * limitations under the License.
  */
 
-import {
-  ImageKind,
-  OPS,
-  RenderingIntentFlag,
-  shadow,
-  warn,
-} from "../shared/util.js";
+import { ImageKind, OPS, RenderingIntentFlag, warn } from "../shared/util.js";
 
 function addState(parentState, pattern, checkFn, iterateFn, processFn) {
   let state = parentState;
@@ -586,14 +580,10 @@ class QueueOptimizer extends NullOptimizer {
 }
 
 class OperatorList {
-  static get CHUNK_SIZE() {
-    return shadow(this, "CHUNK_SIZE", 1000);
-  }
+  static CHUNK_SIZE = 1000;
 
   // Close to chunk size.
-  static get CHUNK_SIZE_ABOUT() {
-    return shadow(this, "CHUNK_SIZE_ABOUT", this.CHUNK_SIZE - 5);
-  }
+  static CHUNK_SIZE_ABOUT = this.CHUNK_SIZE - 5;
 
   constructor(intent = 0, streamSink) {
     this._streamSink = streamSink;

src/core/pattern.js

@@ -17,7 +17,6 @@ import {
   assert,
   FormatError,
   info,
-  shadow,
   unreachable,
   Util,
   warn,
@@ -89,9 +88,7 @@ class Pattern {
 class BaseShading {
   // A small number to offset the first/last color stops so we can insert ones
   // to support extend. Number.MIN_VALUE is too small and breaks the extend.
-  static get SMALL_NUMBER() {
-    return shadow(this, "SMALL_NUMBER", 1e-6);
-  }
+  static SMALL_NUMBER = 1e-6;
 
   constructor() {
     if (this.constructor === BaseShading) {
@@ -374,18 +371,12 @@ const getB = (function getBClosure() {
 })();
 
 class MeshShading extends BaseShading {
-  static get MIN_SPLIT_PATCH_CHUNKS_AMOUNT() {
-    return shadow(this, "MIN_SPLIT_PATCH_CHUNKS_AMOUNT", 3);
-  }
+  static MIN_SPLIT_PATCH_CHUNKS_AMOUNT = 3;
 
-  static get MAX_SPLIT_PATCH_CHUNKS_AMOUNT() {
-    return shadow(this, "MAX_SPLIT_PATCH_CHUNKS_AMOUNT", 20);
-  }
+  static MAX_SPLIT_PATCH_CHUNKS_AMOUNT = 20;
 
   // Count of triangles per entire mesh bounds.
-  static get TRIANGLE_DENSITY() {
-    return shadow(this, "TRIANGLE_DENSITY", 20);
-  }
+  static TRIANGLE_DENSITY = 20;
 
   constructor(
     stream,

src/display/pattern_helper.js

@@ -13,13 +13,7 @@
  * limitations under the License.
  */
 
-import {
-  FormatError,
-  info,
-  shadow,
-  unreachable,
-  Util,
-} from "../shared/util.js";
+import { FormatError, info, unreachable, Util } from "../shared/util.js";
 import { getCurrentTransform } from "./display_utils.js";
 
 const PathType = {
@@ -462,9 +456,7 @@ const PaintType = {
 
 class TilingPattern {
   // 10in @ 300dpi shall be enough.
-  static get MAX_PATTERN_SIZE() {
-    return shadow(this, "MAX_PATTERN_SIZE", 3000);
-  }
+  static MAX_PATTERN_SIZE = 3000;
 
   constructor(IR, color, ctx, canvasGraphicsFactory, baseTransform) {
     this.operatorList = IR[2];