Convert src/core/operator_list.js to use standard classes
With modern JavaScript modules, where only *explicitly* exported properties are visible to the outside, the `QueueOptimizerClosure` should no longer be necessary. Furthermore, to reduce the possibility of `NullOptimizer` and `QueueOptimizer` getting out of sync (note e.g. the inconsistency fixed in PR 10784), we now let the latter extend the former one.
This commit is contained in:
Jonas Jenwald
parent
8a8a67de3b
commit
3cfa316d40
@ -13,9 +13,8 @@
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* limitations under the License.
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*/
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import { assert, ImageKind, OPS, warn } from "../shared/util.js";
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import { assert, ImageKind, OPS, shadow, warn } from "../shared/util.js";
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const QueueOptimizer = (function QueueOptimizerClosure() {
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function addState(parentState, pattern, checkFn, iterateFn, processFn) {
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let state = parentState;
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for (let i = 0, ii = pattern.length - 1; i < ii; i++) {
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@ -29,12 +28,7 @@ const QueueOptimizer = (function QueueOptimizerClosure() {
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};
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}
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function handlePaintSolidColorImageMask(
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iFirstSave,
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count,
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fnArray,
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argsArray
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) {
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function handlePaintSolidColorImageMask(iFirstSave, count, fnArray, argsArray) {
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// Handles special case of mainly LaTeX documents which use image masks to
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// draw lines with the current fill style.
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// 'count' groups of (save, transform, paintImageMaskXObject, restore)+
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@ -309,8 +303,7 @@ const QueueOptimizer = (function QueueOptimizerClosure() {
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const argsArray = context.argsArray;
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const iFirstTransform = context.iCurr - 2;
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return (
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argsArray[iFirstTransform][1] === 0 &&
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argsArray[iFirstTransform][2] === 0
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argsArray[iFirstTransform][1] === 0 && argsArray[iFirstTransform][2] === 0
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);
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},
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function iterateImageGroup(context, i) {
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@ -491,9 +484,27 @@ const QueueOptimizer = (function QueueOptimizerClosure() {
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}
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);
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// eslint-disable-next-line no-shadow
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function QueueOptimizer(queue) {
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class NullOptimizer {
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constructor(queue) {
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this.queue = queue;
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}
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_optimize() {}
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push(fn, args) {
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this.queue.fnArray.push(fn);
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this.queue.argsArray.push(args);
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this._optimize();
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}
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flush() {}
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reset() {}
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}
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class QueueOptimizer extends NullOptimizer {
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constructor(queue) {
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super(queue);
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this.state = null;
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this.context = {
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iCurr: 0,
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@ -504,7 +515,6 @@ const QueueOptimizer = (function QueueOptimizerClosure() {
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this.lastProcessed = 0;
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}
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QueueOptimizer.prototype = {
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_optimize() {
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// Process new fnArray item(s) chunk.
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const fnArray = this.queue.fnArray;
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@ -557,13 +567,7 @@ const QueueOptimizer = (function QueueOptimizerClosure() {
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this.state = state;
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this.match = match;
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this.lastProcessed = i;
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},
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push(fn, args) {
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this.queue.fnArray.push(fn);
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this.queue.argsArray.push(args);
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this._optimize();
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},
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}
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flush() {
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while (this.match) {
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@ -574,43 +578,26 @@ const QueueOptimizer = (function QueueOptimizerClosure() {
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// Repeat optimization until all chunks are exhausted.
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this._optimize();
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}
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},
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}
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reset() {
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this.state = null;
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this.match = null;
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this.lastProcessed = 0;
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},
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};
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return QueueOptimizer;
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})();
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const NullOptimizer = (function NullOptimizerClosure() {
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// eslint-disable-next-line no-shadow
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function NullOptimizer(queue) {
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this.queue = queue;
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}
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}
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NullOptimizer.prototype = {
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push(fn, args) {
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this.queue.fnArray.push(fn);
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this.queue.argsArray.push(args);
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},
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class OperatorList {
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static get CHUNK_SIZE() {
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return shadow(this, "CHUNK_SIZE", 1000);
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}
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flush() {},
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// Close to chunk size.
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static get CHUNK_SIZE_ABOUT() {
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return shadow(this, "CHUNK_SIZE_ABOUT", OperatorList.CHUNK_SIZE - 5);
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}
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reset() {},
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};
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return NullOptimizer;
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})();
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const OperatorList = (function OperatorListClosure() {
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const CHUNK_SIZE = 1000;
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const CHUNK_SIZE_ABOUT = CHUNK_SIZE - 5; // close to chunk size
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// eslint-disable-next-line no-shadow
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function OperatorList(intent, streamSink) {
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constructor(intent, streamSink) {
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this._streamSink = streamSink;
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this.fnArray = [];
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this.argsArray = [];
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@ -625,14 +612,13 @@ const OperatorList = (function OperatorListClosure() {
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this._resolved = streamSink ? null : Promise.resolve();
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}
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OperatorList.prototype = {
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get length() {
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return this.argsArray.length;
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},
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}
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get ready() {
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return this._resolved || this._streamSink.ready;
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},
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}
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/**
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* @type {number} The total length of the entire operator list, since
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@ -640,23 +626,23 @@ const OperatorList = (function OperatorListClosure() {
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*/
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get totalLength() {
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return this._totalLength + this.length;
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},
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}
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addOp(fn, args) {
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this.optimizer.push(fn, args);
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this.weight++;
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if (this._streamSink) {
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if (this.weight >= CHUNK_SIZE) {
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if (this.weight >= OperatorList.CHUNK_SIZE) {
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this.flush();
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} else if (
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this.weight >= CHUNK_SIZE_ABOUT &&
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this.weight >= OperatorList.CHUNK_SIZE_ABOUT &&
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(fn === OPS.restore || fn === OPS.endText)
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) {
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// heuristic to flush on boundary of restore or endText
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// Heuristic to flush on boundary of restore or endText.
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this.flush();
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}
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}
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},
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}
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addDependency(dependency) {
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if (this.dependencies.has(dependency)) {
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@ -664,13 +650,13 @@ const OperatorList = (function OperatorListClosure() {
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}
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this.dependencies.add(dependency);
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this.addOp(OPS.dependency, [dependency]);
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},
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}
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addDependencies(dependencies) {
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for (const dependency of dependencies) {
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this.addDependency(dependency);
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}
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},
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}
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addOpList(opList) {
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if (!(opList instanceof OperatorList)) {
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@ -683,7 +669,7 @@ const OperatorList = (function OperatorListClosure() {
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for (let i = 0, ii = opList.length; i < ii; i++) {
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this.addOp(opList.fnArray[i], opList.argsArray[i]);
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}
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},
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}
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getIR() {
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return {
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@ -691,7 +677,7 @@ const OperatorList = (function OperatorListClosure() {
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argsArray: this.argsArray,
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length: this.length,
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};
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},
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}
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get _transfers() {
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const transfers = [];
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@ -701,7 +687,7 @@ const OperatorList = (function OperatorListClosure() {
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case OPS.paintInlineImageXObject:
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case OPS.paintInlineImageXObjectGroup:
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case OPS.paintImageMaskXObject:
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const arg = argsArray[i][0]; // first param in imgData
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const arg = argsArray[i][0]; // First parameter in imgData.
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if (
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typeof PDFJSDev === "undefined" ||
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@ -719,7 +705,7 @@ const OperatorList = (function OperatorListClosure() {
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}
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}
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return transfers;
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},
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}
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flush(lastChunk = false) {
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this.optimizer.flush();
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@ -742,10 +728,7 @@ const OperatorList = (function OperatorListClosure() {
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this.argsArray.length = 0;
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this.weight = 0;
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this.optimizer.reset();
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},
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};
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return OperatorList;
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})();
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}
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}
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export { OperatorList };
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