pdfClassMap

ClassMap — ISO 32000-2 §14.7.6 — dict of reusable named attribute sets.

Module pdfClassMap | Source packages/front/office/pdf/src/tagged/classMap.js | Deps pdfErrors, pdfParser | Worker-safe yes

/ClassMap (on StructTreeRoot) is a dict name → dict | array<dict>: each key is an attribute-class name, the value is one or more attribute dicts (§14.7.7). A StructElement may reference one or more classes via /C. getClassAttributes(typed, name, owner?) always returns an array — filtered to entries whose /O equals owner when supplied, or the full list otherwise (never a bare dict, never null).

Resolve

const cm = runtime.resolve('pdfClassMap');
// Returns: { typeClassMap, getClassAttributes }

API

Examples

Reading the classes

const cm = runtime.resolve('pdfClassMap').typeClassMap(root.classMap);
cm.classes.Heading1;     // [{type:'dict', entries:{O:{value:'Layout'}, …}}, …]

Lookup by owner

const layout = cm.getClassAttributes(cm, 'Heading1', 'Layout');
if (layout.length) layout[0].entries.SpaceBefore;

Applying to a StructElement

const el = runtime.resolve('pdfStructElement').typeStructElement(dict);
for (const className of (el.c && el.c.items) || []) {
    const attrs = cm.getClassAttributes(cm, className.value);
}

Errors

See also

• pdfStructElement · pdfStructTree