127 lines
4.3 KiB
C++
127 lines
4.3 KiB
C++
#pragma once
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#include <expected>
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#include <memory>
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#include <string>
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#include <vector>
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#include <cstdint>
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namespace pdfengine {
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enum class EngineError {
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FileNotFound,
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InvalidFormat,
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PasswordRequired,
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InvalidPassword,
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PageOutOfBounds,
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RenderFailed,
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WriteFailed,
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Unknown
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};
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struct DocumentMetadata {
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std::string title;
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std::string author;
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std::string creator;
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std::string producer;
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std::string creationDate;
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std::string modificationDate;
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};
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struct PageImage {
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int width;
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int height;
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std::vector<uint8_t> data;
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};
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struct Point2D {
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double x;
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double y;
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};
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struct DevicePoint {
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int x;
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int y;
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};
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struct GlyphBounds {
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std::string text;
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double x;
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double y;
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double w;
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double h;
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double fontSize;
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};
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struct FontInfo {
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std::string fontName;
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std::string type; // "TrueType", "Type1", "CIDFontType0", "CIDFontType2"
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bool isEmbedded = false;
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bool isSubset = false;
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bool isVertical = false;
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// Advanced Introspection & Diagnostics
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std::string encoding; // "WinAnsiEncoding", "MacRomanEncoding", "Identity-H", "Identity-V", "Symbol", "Custom", "None"
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bool hasToUnicode = false; // True if font has an active /ToUnicode map
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std::string cmapName; // e.g. "Identity-H", "Identity-V", "UniJIS-UTF16-H"
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std::string cidSystemInfo; // e.g. "Adobe-Japan1", "Adobe-GB1", "Adobe-Korea1"
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std::string subsetTag; // e.g. "ABCDEE" (6-character uppercase tag)
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std::string sourceType; // "Embedded", "SystemFallback", "Substituted"
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std::string substitutedFrom; // e.g. "Helvetica" (Original requested font)
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std::string substitutedTo; // e.g. "Liberation Sans" (Actual fallback font used)
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std::string normalizedFamily; // e.g. "Arial" (Normalized family grouping name)
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std::string internalFontId; // Unique stable identifier for internal tracking
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uint32_t flags = 0; // PDF font descriptor flags
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double ascent = 0.0; // Font descriptor Ascent metric
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double descent = 0.0; // Font descriptor Descent metric
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double capHeight = 0.0; // Font descriptor CapHeight metric
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};
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class PdfPage {
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public:
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virtual ~PdfPage() = default;
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[[nodiscard]] virtual double width() const noexcept = 0;
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[[nodiscard]] virtual double height() const noexcept = 0;
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[[nodiscard]] virtual std::expected<PageImage, EngineError> render(int dpi = 96) const = 0;
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[[nodiscard]] virtual std::expected<std::string, EngineError> extractText() const = 0;
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[[nodiscard]] virtual std::expected<std::vector<GlyphBounds>, EngineError> extractTextWithBounds() const = 0;
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[[nodiscard]] virtual std::expected<std::vector<FontInfo>, EngineError> getFonts() const = 0;
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[[nodiscard]] virtual std::expected<std::vector<std::string>, EngineError> extractAnnotationsText() const = 0;
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[[nodiscard]] virtual std::expected<double, EngineError> getGlyphWidth(const std::string& fontName, uint32_t charcode, double fontSize) const = 0;
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[[nodiscard]] virtual DevicePoint pageToDevice(const Point2D& pagePoint, int deviceWidth, int deviceHeight, int rotate = 0) const noexcept = 0;
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[[nodiscard]] virtual Point2D deviceToPage(const DevicePoint& devicePoint, int deviceWidth, int deviceHeight, int rotate = 0) const noexcept = 0;
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};
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class PdfDocument {
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public:
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virtual ~PdfDocument() = default;
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[[nodiscard]] static std::expected<std::shared_ptr<PdfDocument>, EngineError>
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loadFromFile(const std::string& path, const std::string& password = "");
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[[nodiscard]] static std::expected<std::shared_ptr<PdfDocument>, EngineError>
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loadFromMemory(const std::vector<uint8_t>& data, const std::string& password = "");
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[[nodiscard]] virtual int pageCount() const noexcept = 0;
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[[nodiscard]] virtual DocumentMetadata metadata() const noexcept = 0;
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[[nodiscard]] virtual std::expected<std::shared_ptr<PdfPage>, EngineError>
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getPage(int pageIndex) = 0;
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[[nodiscard]] virtual std::expected<std::vector<FontInfo>, EngineError>
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getFonts(int startPage = 0, int endPage = -1) const = 0;
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virtual std::expected<void, EngineError> applyEdits(const std::string& editsJson) = 0;
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[[nodiscard]] virtual std::expected<std::vector<uint8_t>, EngineError>
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saveIncremental() const = 0;
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};
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} |