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Create the number tree for the ParentTree only one time #20425

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Merged
merged 1 commit into from
Nov 7, 2025
Merged

Create the number tree for the ParentTree only one time #20425

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13 changes: 9 additions & 4 deletions src/core/struct_tree.js
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,7 @@ class StructTreeRoot {
this.roleMap = new Map();
this.structParentIds = null;
this.kidRefToPosition = undefined;
this.parentTree = null;
}

getKidPosition(kidRef) {
Expand Down Expand Up @@ -70,6 +71,11 @@ class StructTreeRoot {

init() {
this.readRoleMap();
const parentTree = this.dict.get("ParentTree");
if (!parentTree) {
return;
}
this.parentTree = new NumberTree(parentTree, this.xref);
}

#addIdToPage(pageRef, id, type) {
Expand Down Expand Up @@ -771,7 +777,7 @@ class StructTreePage {
return;
}

const parentTree = this.rootDict.get("ParentTree");
const { parentTree } = this.root;
if (!parentTree) {
return;
}
Expand All @@ -782,10 +788,9 @@ class StructTreePage {
}

const map = new Map();
const numberTree = new NumberTree(parentTree, this.xref);

if (Number.isInteger(id)) {
const parentArray = numberTree.get(id);
const parentArray = parentTree.get(id);
if (Array.isArray(parentArray)) {
for (const ref of parentArray) {
if (ref instanceof Ref) {
Expand All @@ -799,7 +804,7 @@ class StructTreePage {
return;
}
for (const [elemId, type] of ids) {
const obj = numberTree.get(elemId);
const obj = parentTree.get(elemId);
if (obj) {
const elem = this.addNode(this.xref.fetchIfRef(obj), map);
if (
Expand Down