PdfElixide.Editor (pdf_elixide v0.9.0)

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Mutable, in-memory PDF editor backed by pdf_oxide's DocumentEditor.

Summary

Functions

Releases the editor's native memory immediately.

Returns whether the editor has been released with close/1.

Opens a PDF document for editing from the given binary data.

Opens a PDF document for editing from the given binary data, raising an error if it fails.

Opens a PDF document for editing from the specified file path.

Opens a PDF document for editing from the specified file path, raising an error if it fails.

Writes all in-memory changes to a PDF file at the given path.

Writes all in-memory changes to a PDF file at the given path, raising an error if it fails.

Returns the file path from which the editor was loaded, or nil if it was loaded from binary data.

Serialises all in-memory changes into a PDF binary.

Serialises all in-memory changes into a PDF binary, raising an error if it fails.

Types

save_opts()

@type save_opts() :: [
  incremental: boolean(),
  compress: boolean(),
  linearize: boolean(),
  garbage_collect: boolean()
]

Options accepted by save/3, save!/3, to_binary/2, and to_binary!/2.

  • :incremental — write an incremental update instead of a full rewrite. Defaults to false.
  • :compress — compress streams. Defaults to true.
  • :linearize — linearize the output for fast web view. Defaults to false.
  • :garbage_collect — drop unreferenced objects. Defaults to true.

Defaults mirror pdf_oxide's SaveOptions::full_rewrite(), so calling save/2 is equivalent to save/3 with no options.

t()

@type t() :: %PdfElixide.Editor{ref: reference(), source_path: Path.t() | nil}

Functions

close(editor)

@spec close(t()) :: :ok

Releases the editor's native memory immediately.

An editor holds the source document plus its pending edits in memory on the Rust side, normally freed only when the BEAM garbage-collects the handle. close/1 frees it now, which matters for long-lived processes that open many documents. Calling it is optional and idempotent.

Unsaved edits are discarded — call save/3 or to_binary/2 first. Afterwards, functions that read or mutate the editor return {:error, %PdfElixide.Error{reason: :closed}}, and their bang variants raise it. source_path/1 keeps working, since it reads the struct rather than the native handle.

editor = PdfElixide.Editor.open!("form.pdf")
:ok = PdfElixide.Form.set_value(editor, "name", "Ada")
:ok = PdfElixide.Editor.save(editor, "filled.pdf")
:ok = PdfElixide.Editor.close(editor)

closed?(editor)

@spec closed?(t()) :: boolean()

Returns whether the editor has been released with close/1.

from_binary(bytes)

@spec from_binary(binary()) :: {:ok, t()} | {:error, PdfElixide.Error.t()}

Opens a PDF document for editing from the given binary data.

from_binary!(bytes)

@spec from_binary!(binary()) :: t()

Opens a PDF document for editing from the given binary data, raising an error if it fails.

open(path)

@spec open(Path.t()) :: {:ok, t()} | {:error, PdfElixide.Error.t()}

Opens a PDF document for editing from the specified file path.

open!(path)

@spec open!(Path.t()) :: t()

Opens a PDF document for editing from the specified file path, raising an error if it fails.

save(editor, path, opts \\ [])

@spec save(t(), Path.t(), save_opts()) :: :ok | {:error, PdfElixide.Error.t()}

Writes all in-memory changes to a PDF file at the given path.

save!(editor, path, opts \\ [])

@spec save!(t(), Path.t(), save_opts()) :: :ok

Writes all in-memory changes to a PDF file at the given path, raising an error if it fails.

source_path(editor)

@spec source_path(t()) :: Path.t() | nil

Returns the file path from which the editor was loaded, or nil if it was loaded from binary data.

to_binary(editor, opts \\ [])

@spec to_binary(t(), save_opts()) :: {:ok, binary()} | {:error, PdfElixide.Error.t()}

Serialises all in-memory changes into a PDF binary.

The result is a fully self-contained PDF that can be written to disk, stored in a database, or streamed over HTTP.

Accepts the same save_opts/0 keyword list as save/3. Note that :incremental is not supported here — upstream returns {:error, _} because incremental updates can only be appended to the original file.

The whole document is serialised in native memory before being copied into the returned binary, so peak usage is roughly twice the output size (on top of the editor itself). For very large documents prefer save/3, which streams to the file without that second buffer.

to_binary!(editor, opts \\ [])

@spec to_binary!(t(), save_opts()) :: binary()

Serialises all in-memory changes into a PDF binary, raising an error if it fails.