Arquitetura em Profundidade

O TCPDF-Next é organizado em 26 módulos distribuídos em 4 pacotes, com 213 arquivos PHP no total.

Visão Geral da Arquitetura

graph TB
    subgraph Core["Core (yeeefang/tcpdf-next)"]
        Doc[Document] --> Font[FontRegistry]
        Doc --> Img[ImageRegistry]
        Doc --> Sec[SecurityEngine]
        Doc --> Bar[BarcodeEngine]
    end
    subgraph Extensions["Extensions"]
        Art["Artisan<br/>Chrome CDP"] -->|HTML→PDF| Doc
        Pro["Pro<br/>PAdES B-LTA"] -->|Signing| Sec
    end
    subgraph Frameworks["Frameworks"]
        Lara["Laravel 12"] -->|Facade| Doc
        Sym["Symfony 7"] -->|Bundle| Doc
        CI["CodeIgniter 4"] -->|Service| Doc
    end
    Adapt["Adaptation<br/>Legacy API"] -.->|Compat Layer| Doc

Estatísticas do Projeto

Métrica	Core	Laravel	Artisan	Pro	Total
Arquivos PHP	148	4	17	47	213
Módulos	16	1	2	7	26
Testes	908	--	7 classes	--	908+
Assertions	28.881	--	--	--	28.881+
Nível PHPStan	10	10	10	10	10

Mapa de Namespaces

Core (yeeefang/tcpdf-next)

Yeeefang\TcpdfNext\
├── Core\               # Document, ObjectRegistry, TransactionManager, CrossReferenceStream
│   └── Concerns\       # 12 composable traits (HasMetadata, HasPages, ...)
├── Contracts\          # PdfDocumentInterface, SignerInterface, HsmSignerInterface, enums
├── ValueObjects\       # PageSize, Dimension, Margin, Position, Unit
├── Support\            # BinaryBuffer
├── Content\            # TextRenderer, JavaScriptManager, Hyphenator
│   └── Hyphenation\    # HyphenationPatterns
├── Typography\         # FontManager, TrueTypeParser, Type1Parser, FontSubsetter, BiDiResolver
├── Graphics\           # DrawingEngine, TransformEngine, Color, ImageLoader, SvgParser
├── Layout\             # HeaderFooter, ColumnLayout, BookletLayout, PageManager
├── Html\               # HtmlParser, TableParser, CssRule
├── Form\               # FormFieldManager, FormFlattener
├── Barcode\            # Barcode1D, Barcode2D, BarcodeRenderer
│   ├── QrCode\         # QrEncoder
│   ├── DataMatrix\     # DataMatrixEncoder
│   └── Pdf417\         # Pdf417Encoder
├── Navigation\         # BookmarkManager, LinkManager, TocBuilder, AnnotationManager
├── Accessibility\      # StructureTree, RoleMap, StructureElement
├── Security\           # Encryption + Signatures
│   ├── Encryption\     # Aes256Encryptor, SaslPrep
│   ├── Signature\      # DigitalSigner, PadesOrchestrator, CertificateInfo, SignatureAppearance
│   └── Timestamp\      # TsaClient
└── Writer\             # PdfWriter, Linearizer, ViewerPreferences, data classes

Artisan (yeeefang/tcpdf-next-artisan)

Yeeefang\TcpdfNext\
├── Artisan\            # ChromeHtmlRenderer, BrowserPool, ChromeRendererConfig
│   └── Exception\      # ChromeNotAvailableException, ChromeRenderException, PdfParseException
└── Parser\             # PdfTokenizer, CrossRefParser, PdfReader, StreamDecoder, ResourceCollector

Laravel (yeeefang/tcpdf-next-laravel)

Yeeefang\TcpdfNext\Laravel\
├── TcpdfServiceProvider
├── Facades\Pdf
├── Http\PdfResponse
└── Jobs\GeneratePdfJob

Pro (yeeefang/tcpdf-next-pro)

Yeeefang\TcpdfNext\
├── Archive\            # PdfAManager, PdfAVersion, XmpMetadata, OutputIntent
├── Barcode\            # Specialty barcodes
│   ├── MicroQr\        # MicroQrEncoder
│   ├── DotCode\        # DotCodeEncoder
│   ├── HanXin\         # HanXinEncoder
│   ├── JabCode\        # JabCodeEncoder (LDPC, interleaver, matrix)
│   ├── Gs1\            # Gs1DataParser
│   └── Imb\            # ImbEncoder
├── Security\
│   ├── Ltv\            # LtvManager, DssBuilder, OcspClient, CrlFetcher, CertificateChainValidator
│   ├── Signature\Hsm\  # Pkcs11Signer, OpenSslEngineSigner
│   ├── Timestamp\      # DocumentTimestamp
│   ├── Asn1\           # CertificateParser, AlgorithmIdentifier
│   └── CertificateTransparency\  # CtValidationResult
└── Writer\             # IncrementalUpdateWriter

Inicialização Lazy

A classe Document instancia apenas sub-engines essenciais no construtor:

Sempre inicializados: DocumentData, PdfWriter, FontManager, DrawingEngine, TransformEngine, TextRenderer, HeaderFooter, ColumnLayout, BookmarkManager, LinkManager, TocBuilder, AnnotationManager, PageManager, FontMetrics

Lazy (null até o primeiro uso): FormFieldManager, LayerManager, TemplateManager, TransactionManager, BookletLayout, FileAttachment, JavaScriptManager, SvgParser, EpsParser, StructureTree, SpotColorManager, ImageLoader, BiDiResolver

Isso mantém o footprint de memória base pequeno para documentos simples enquanto fornece funcionalidade completa quando necessário.

Integração de Extensões

O pacote Core detecta extensões em tempo de execução via class_exists():

// Artisan detection
$rendererClass = 'Yeeefang\\TcpdfNext\\Artisan\\ChromeHtmlRenderer';
if (!class_exists($rendererClass)) {
    throw new \RuntimeException(
        'Chrome renderer requires yeeefang/tcpdf-next-artisan.'
    );
}

Isso significa:

• O Core tem zero dependências hard do Artisan, Laravel ou Pro
• Extensões são carregadas automaticamente pelo Composer -- basta composer require e elas funcionam
• O ServiceProvider do Laravel auto-detecta Artisan e Pro, configurando bindings adequadamente