257 lines
10 KiB
TeX
257 lines
10 KiB
TeX
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/* CHAPTER 1. Basics */
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/** Loads a PDF document from a file. Supply
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a user password (possibly blank) in case the file is encrypted. It won't be
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decrypted, but sometimes the password is needed just to load the file.
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@param filename file name
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@param userpw user password */
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public Pdf fromFile(String filename, String userpw) throws CpdfError;
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/** Loads a PDF document from a file, doing only minimal
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parsing. The objects will be read and parsed when they are actually
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needed. Use this when the whole file won't be required. Also supply a user
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password (possibly blank) in case the file is encrypted. It won't be
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decrypted, but sometimes the password is needed just to load the file.
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@param filename file name
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@param userpw user password */
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public Pdf fromFileLazy(String filename, String userpw) throws CpdfError;
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/** Loads a PDF document from memory. Supply
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a user password (possibly blank) in case the file is encrypted. It won't be
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decrypted, but sometimes the password is needed just to load the file.
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@param data byte array containing the PDF file
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@param userpw user password */
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public Pdf fromMemory(byte[] data, String userpw) throws CpdfError;
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/** Loads a file from memory and the user
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password, but lazily like {@link #fromFileLazy(String, String)
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fromFileLazy}. The caller must use {@link #fromMemoryLazyRelease(byte[])
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fromMemoryLazyRelease} to free the memory. It must not free the memory
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until the PDF is also gone. */
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public Pdf fromMemoryLazy(byte[] data, String userpw) throws CpdfError;
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/** Releases memory returned from
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<code>{@link #fromMemoryLazy(byte[], String) fromMemoryLazy}</code>
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@param data byte array previously passed to {@link #fromMemoryLazy(byte[],
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String) fromMemoryLazy} */
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public native void fromMemoryLazyRelease(byte[] data) throws CpdfError;
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/** Begins enumerating currently allocated PDFs.
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<p>To enumerate the list of currently allocated PDFs, call
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{@link #startEnumeratePDFs() startEnumeratePDFs} which gives the number,
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<code>n</code>, of PDFs allocated, then {@link #enumeratePDFsInfo(int)
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enumeratePDFsInfo} and {@link #enumeratePDFsKey(int) enumeratePDFsKey} with
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index numbers from <code>0...(n - 1)</code>. Call
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{@link #endEnumeratePDFs() endEnumeratePDFs} to clean up. */
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public native int startEnumeratePDFs() throws CpdfError;
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/** Returns the key for a given PDF number. */
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public native int enumeratePDFsKey(int n) throws CpdfError;
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/** Returns the info for a given PDF number. */
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public native String enumeratePDFsInfo(int n) throws CpdfError;
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/** Ends enumeration of currently allocated PDFs. */
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public native void endEnumeratePDFs() throws CpdfError;
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/** Converts a figure in centimetres to points. (72 points to 1 inch) */
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public native double ptOfCm(double f) throws CpdfError;
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/** Converts a figure in millimetres to points. (72 points to 1 inch) */
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public native double ptOfMm(double f) throws CpdfError;
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/** Converts a figure in inches to points (72. points to 1 inch) */
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public native double ptOfIn(double f) throws CpdfError;
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/** Converts a figure in points to centimetres. (72 points to 1 inch) */
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public native double cmOfPt(double f) throws CpdfError;
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/** Converts a figure in points to millimetres. (72 points to 1 inch) */
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public native double mmOfPt(double f) throws CpdfError;
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/** Converts a figure in points to millimetres. (72 points to 1 inch) */
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public native double inOfPt(double f) throws CpdfError;
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/** Parses a page specification such as <code>1,2,6-end</code> with
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reference to a given PDF. (The PDF is supplied so that page ranges which
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reference pages which do not exist are rejected).
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@param pdf PDF document
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@param pagespec page specification */
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public native Range parsePagespec(Pdf pdf, String pagespec)
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throws CpdfError;
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/** Validates a page specification so far as is possible in the absence of
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the actual document. Result is <code>true</code> if valid. */
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public native boolean validatePagespec(String pagespec) throws CpdfError;
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/** Builds a page specification from a page range. For example, the range
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containing 1,2,3,6,7,8 in a document of 8 pages might yield
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<code>"1-3,6-end"</code>
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@param pdf PDF document
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@param r page range
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*/
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public String stringOfPagespec(Pdf pdf, Range r) throws CpdfError;
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/** The range containing no pages. */
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public native Range blankRange() throws CpdfError;
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/** The page range containing all page numbers from one page number to
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another.
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@param from page number to begin at (inclusive)
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@param to page number to end at (inclusive) */
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public native Range range(int from, int to) throws CpdfError;
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/** The page range contaning all pages in a given document. */
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public native Range all(Pdf pdf) throws CpdfError;
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/** The page range containing all odd-numbered pages from an existing
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range. */
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public native Range odd(Range r) throws CpdfError;
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/** The page range containing all even-numbered pages from an existing
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range. */
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public native Range even(Range r) throws CpdfError;
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/** The union of two ranges - all those pages in either. */
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public native Range rangeUnion(Range r, Range s) throws CpdfError;
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/** The range containing all pages in the first given range which are not
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in the second. */
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public native Range difference(Range r, Range s) throws CpdfError;
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/** Remove duplicates from a range, returning a new one. */
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public native Range removeDuplicates(Range r) throws CpdfError;
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/** The length of a range. */
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public native int rangeLength(Range r) throws CpdfError;
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/** Gets a page number from a range at the given offset. */
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public native int rangeGet(Range r, int n) throws CpdfError;
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/** Adds a page number to a range, returning a new one. */
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public native Range rangeAdd(Range r, int n) throws CpdfError;
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/** Tests to see if a given number is in a page range. */
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public native boolean isInRange(Range r, int n) throws CpdfError;
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/** Returns the number of pages in a PDF. */
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public native int pages(Pdf pdf) throws CpdfError;
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/** Returns the number of pages in a given
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PDF, with given user password. It tries to do this as fast as
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possible, without loading the whole file.
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@param userpw user password
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@param filename file name */
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public int pagesFast(String userpw, String filename) throws CpdfError;
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/** Writes the PDF document to a given filename. If <code>linearize</code>
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is <code>true</code>, it will be linearized if a linearizer is available.
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If <code>make_id</code> is <code>true</code>, it will be given a new ID.
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@param pdf PDF document
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@param filename file name
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@param linearize linearize
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@param make_id make new ID
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*/
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public void toFile(Pdf pdf, String filename, boolean linearize,
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boolean make_id)
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throws CpdfError;
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/** Writes the PDF document to a given filename, with extra parameters. If
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<code>make_id</code> is true, it will be given a new ID. If
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<code>preserve_objstm</code> is true, existing object streams will be
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preserved. If <code>generate_objstm</code> is true, object streams will be
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generated even if not originally present. If <code>compress_objstm</code>
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is true, object streams will be compressed (what we usually want).
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WARNING: the pdf argument will be invalid after this call, and should not
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be used again.
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@param pdf PDF document
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@param filename file name
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@param linearize linearize
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@param make_id make new ID
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@param preserve_objstm preserve object streams
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@param create_objstm create new object streams
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@param compress_objstm compress object streams
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*/
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public void toFileExt(Pdf pdf, String filename, boolean linearize,
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boolean make_id, boolean preserve_objstm,
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boolean create_objstm, boolean compress_objstm)
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throws CpdfError;
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/** Writes a PDF document and returns it as an array of bytes.
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@param pdf PDF document
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@param linearize linearize
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@param make_id make new ID
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*/
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public native byte[] toMemory(Pdf pdf, boolean linearize, boolean make_id)
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throws CpdfError;
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/** Returns <code>true</code> if a document is encrypted,
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<code>false</code> otherwise. */
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public native boolean isEncrypted(Pdf pdf) throws CpdfError;
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/** Attempts to decrypt a PDF using the given
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user password. An exception is raised if the decryption fails.
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@param pdf PDF document
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@param userpw user password */
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public void decryptPdf(Pdf pdf, String userpw) throws CpdfError;
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/** Attempts to decrypt a PDF using the given owner password. Raises an
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exception if the decryption fails.
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@param pdf PDF document
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@param ownerpw owner password */
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public void decryptPdfOwner(Pdf pdf, String ownerpw) throws CpdfError;
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/** Writes a PDF document as encrypted. The encryption method and
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permissions are drawn from Jcpdf's fields, documented above.
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@param pdf PDF document
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@param encryption_method encryption method, e.g
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{@link #aes256bitisofalse aes256bitisofalse}
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@param permissions array of permissions e.g {@link #noEdit noEdit}
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@param owner_password owner password
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@param user_password user password
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@param linearize linearize
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@param makeid make new ID
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@param filename file name */
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public void toFileEncrypted(Pdf pdf, int encryption_method,
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int[] permissions, String owner_password,
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String user_password, boolean linearize,
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boolean makeid, String filename)
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throws CpdfError;
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/** Writes a file as encrypted with extra parameters. WARNING: the pdf
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argument will be invalid after this call, and should not be used again.
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@param pdf PDF document
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@param encryption_method encryption method, e.g
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{@link #aes256bitisofalse aes256bitisofalse}
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@param permissions array of permissions e.g {@link #noEdit noEdit}
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@param owner_password owner password
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@param user_password user password
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@param linearize linearize
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@param makeid make new ID
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@param preserve_objstm preserve existing object streams
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@param generate_objstm generate new object streams
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@param compress_objstm compress object streams
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@param filename file name */
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public void toFileEncryptedExt(Pdf pdf, int encryption_method,
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int[] permissions, String owner_password,
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String user_password, boolean linearize,
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boolean makeid, boolean preserve_objstm,
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boolean generate_objstm,
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boolean compress_objstm, String filename)
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throws CpdfError;
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/** Returns <code>true</code> if the given permission (restriction) such as
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{@link #noEdit noEdit} is present. */
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public native boolean hasPermission(Pdf pdf, int permission)
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throws CpdfError;
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/** Returns the encryption method currently in use on a document, such as
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{@link #aes256bitisofalse aes256bitisofalse}. */
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public native int encryptionKind(Pdf pdf) throws CpdfError;
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