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hpdf_doc.c
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hpdf_doc.c
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/*
* << Haru Free PDF Library >> -- hpdf_doc.c
*
* URL: http://libharu.org
*
* Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
* Copyright (c) 2007-2009 Antony Dovgal <tony@daylessday.org>
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
* It is provided "as is" without express or implied warranty.
*
*/
#include "hpdf_conf.h"
#include "hpdf_utils.h"
#include "hpdf_encryptdict.h"
#include "hpdf_namedict.h"
#include "hpdf_destination.h"
#include "hpdf_info.h"
#include "hpdf_page_label.h"
#include "hpdf.h"
static const char * const HPDF_VERSION_STR[6] = {
"%PDF-1.2\012%\267\276\255\252\012",
"%PDF-1.3\012%\267\276\255\252\012",
"%PDF-1.4\012%\267\276\255\252\012",
"%PDF-1.5\012%\267\276\255\252\012",
"%PDF-1.6\012%\267\276\255\252\012",
"%PDF-1.7\012%\267\276\255\252\012"
};
static HPDF_STATUS
WriteHeader (HPDF_Doc pdf,
HPDF_Stream stream);
static HPDF_STATUS
PrepareTrailer (HPDF_Doc pdf);
static void
FreeEncoderList (HPDF_Doc pdf);
static void
FreeFontDefList (HPDF_Doc pdf);
static void
CleanupFontDefList (HPDF_Doc pdf);
static HPDF_Dict
GetInfo (HPDF_Doc pdf);
static HPDF_STATUS
InternalSaveToStream (HPDF_Doc pdf,
HPDF_Stream stream);
static const char*
LoadType1FontFromStream (HPDF_Doc pdf,
HPDF_Stream afmdata,
HPDF_Stream pfmdata);
static const char*
LoadTTFontFromStream (HPDF_Doc pdf,
HPDF_Stream font_data,
HPDF_BOOL embedding,
const char *file_name);
static const char*
LoadTTFontFromStream2 (HPDF_Doc pdf,
HPDF_Stream font_data,
HPDF_UINT index,
HPDF_BOOL embedding,
const char *file_name);
/*---------------------------------------------------------------------------*/
HPDF_EXPORT(const char *)
HPDF_GetVersion (void)
{
return HPDF_VERSION_TEXT;
}
HPDF_BOOL
HPDF_Doc_Validate (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_Doc_Validate\n"));
if (!pdf || pdf->sig_bytes != HPDF_SIG_BYTES)
return HPDF_FALSE;
else
return HPDF_TRUE;
}
HPDF_EXPORT(HPDF_BOOL)
HPDF_HasDoc (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_HasDoc\n"));
if (!pdf || pdf->sig_bytes != HPDF_SIG_BYTES)
return HPDF_FALSE;
if (!pdf->catalog || pdf->error.error_no != HPDF_NOERROR) {
HPDF_RaiseError (&pdf->error, HPDF_INVALID_DOCUMENT, 0);
return HPDF_FALSE;
} else
return HPDF_TRUE;
}
HPDF_EXPORT(HPDF_Doc)
HPDF_New (HPDF_Error_Handler user_error_fn,
void *user_data)
{
HPDF_PTRACE ((" HPDF_New\n"));
return HPDF_NewEx (user_error_fn, NULL, NULL, 0, user_data);
}
HPDF_EXPORT(HPDF_Doc)
HPDF_NewEx (HPDF_Error_Handler user_error_fn,
HPDF_Alloc_Func user_alloc_fn,
HPDF_Free_Func user_free_fn,
HPDF_UINT mem_pool_buf_size,
void *user_data)
{
HPDF_Doc pdf;
HPDF_MMgr mmgr;
HPDF_Error_Rec tmp_error;
HPDF_PTRACE ((" HPDF_NewEx\n"));
/* initialize temporary-error object */
HPDF_Error_Init (&tmp_error, user_data);
/* create memory-manager object */
mmgr = HPDF_MMgr_New (&tmp_error, mem_pool_buf_size, user_alloc_fn,
user_free_fn);
if (!mmgr) {
HPDF_CheckError (&tmp_error);
return NULL;
}
/* now create pdf_doc object */
pdf = HPDF_GetMem (mmgr, sizeof (HPDF_Doc_Rec));
if (!pdf) {
HPDF_MMgr_Free (mmgr);
HPDF_CheckError (&tmp_error);
return NULL;
}
HPDF_MemSet (pdf, 0, sizeof (HPDF_Doc_Rec));
pdf->sig_bytes = HPDF_SIG_BYTES;
pdf->mmgr = mmgr;
pdf->pdf_version = HPDF_VER_13;
pdf->compression_mode = HPDF_COMP_NONE;
/* copy the data of temporary-error object to the one which is
included in pdf_doc object */
pdf->error = tmp_error;
/* switch the error-object of memory-manager */
mmgr->error = &pdf->error;
if (HPDF_NewDoc (pdf) != HPDF_OK) {
HPDF_Free (pdf);
HPDF_CheckError (&tmp_error);
return NULL;
}
pdf->error.error_fn = user_error_fn;
return pdf;
}
HPDF_EXPORT(void)
HPDF_Free (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_Free\n"));
if (pdf) {
HPDF_MMgr mmgr = pdf->mmgr;
HPDF_FreeDocAll (pdf);
pdf->sig_bytes = 0;
HPDF_FreeMem (mmgr, pdf);
HPDF_MMgr_Free (mmgr);
}
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_NewDoc (HPDF_Doc pdf)
{
char buf[HPDF_TMP_BUF_SIZ];
char *ptr = buf;
char *eptr = buf + HPDF_TMP_BUF_SIZ - 1;
const char *version;
HPDF_PTRACE ((" HPDF_NewDoc\n"));
if (!HPDF_Doc_Validate (pdf))
return HPDF_DOC_INVALID_OBJECT;
HPDF_FreeDoc (pdf);
pdf->xref = HPDF_Xref_New (pdf->mmgr, 0);
if (!pdf->xref)
return HPDF_CheckError (&pdf->error);
pdf->trailer = pdf->xref->trailer;
pdf->font_mgr = HPDF_List_New (pdf->mmgr, HPDF_DEF_ITEMS_PER_BLOCK);
if (!pdf->font_mgr)
return HPDF_CheckError (&pdf->error);
if (!pdf->fontdef_list) {
pdf->fontdef_list = HPDF_List_New (pdf->mmgr,
HPDF_DEF_ITEMS_PER_BLOCK);
if (!pdf->fontdef_list)
return HPDF_CheckError (&pdf->error);
}
if (!pdf->encoder_list) {
pdf->encoder_list = HPDF_List_New (pdf->mmgr,
HPDF_DEF_ITEMS_PER_BLOCK);
if (!pdf->encoder_list)
return HPDF_CheckError (&pdf->error);
}
pdf->catalog = HPDF_Catalog_New (pdf->mmgr, pdf->xref);
if (!pdf->catalog)
return HPDF_CheckError (&pdf->error);
pdf->root_pages = HPDF_Catalog_GetRoot (pdf->catalog);
if (!pdf->root_pages)
return HPDF_CheckError (&pdf->error);
pdf->page_list = HPDF_List_New (pdf->mmgr, HPDF_DEF_PAGE_LIST_NUM);
if (!pdf->page_list)
return HPDF_CheckError (&pdf->error);
pdf->cur_pages = pdf->root_pages;
ptr = (char *)HPDF_StrCpy (ptr, (const char *)"Haru Free PDF Library ", eptr);
version = HPDF_GetVersion ();
HPDF_StrCpy (ptr, version, eptr);
if (HPDF_SetInfoAttr (pdf, HPDF_INFO_PRODUCER, buf) != HPDF_OK)
return HPDF_CheckError (&pdf->error);
return HPDF_OK;
}
HPDF_EXPORT(void)
HPDF_FreeDoc (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_FreeDoc\n"));
if (HPDF_Doc_Validate (pdf)) {
if (pdf->xref) {
HPDF_Xref_Free (pdf->xref);
pdf->xref = NULL;
}
if (pdf->font_mgr) {
HPDF_List_Free (pdf->font_mgr);
pdf->font_mgr = NULL;
}
if (pdf->fontdef_list)
CleanupFontDefList (pdf);
HPDF_MemSet(pdf->ttfont_tag, 0, 6);
pdf->pdf_version = HPDF_VER_13;
pdf->outlines = NULL;
pdf->catalog = NULL;
pdf->root_pages = NULL;
pdf->cur_pages = NULL;
pdf->cur_page = NULL;
pdf->encrypt_on = HPDF_FALSE;
pdf->cur_page_num = 0;
pdf->cur_encoder = NULL;
pdf->def_encoder = NULL;
pdf->page_per_pages = 0;
if (pdf->page_list) {
HPDF_List_Free (pdf->page_list);
pdf->page_list = NULL;
}
pdf->encrypt_dict = NULL;
pdf->info = NULL;
HPDF_Error_Reset (&pdf->error);
if (pdf->stream) {
HPDF_Stream_Free (pdf->stream);
pdf->stream = NULL;
}
}
}
HPDF_EXPORT(void)
HPDF_FreeDocAll (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_FreeDocAll\n"));
if (HPDF_Doc_Validate (pdf)) {
HPDF_FreeDoc (pdf);
if (pdf->fontdef_list)
FreeFontDefList (pdf);
if (pdf->encoder_list)
FreeEncoderList (pdf);
pdf->compression_mode = HPDF_COMP_NONE;
HPDF_Error_Reset (&pdf->error);
}
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_SetPagesConfiguration (HPDF_Doc pdf,
HPDF_UINT page_per_pages)
{
HPDF_PTRACE ((" HPDF_SetPagesConfiguration\n"));
if (!HPDF_HasDoc (pdf))
return HPDF_INVALID_DOCUMENT;
if (pdf->cur_page)
return HPDF_RaiseError (&pdf->error, HPDF_INVALID_DOCUMENT_STATE, 0);
if (page_per_pages > HPDF_LIMIT_MAX_ARRAY)
return HPDF_RaiseError (&pdf->error, HPDF_INVALID_PARAMETER, 0);
if (pdf->cur_pages == pdf->root_pages) {
pdf->cur_pages = HPDF_Doc_AddPagesTo (pdf, pdf->root_pages);
if (!pdf->cur_pages)
return pdf->error.error_no;
pdf->cur_page_num = 0;
}
pdf->page_per_pages = page_per_pages;
return HPDF_OK;
}
static HPDF_STATUS
WriteHeader (HPDF_Doc pdf,
HPDF_Stream stream)
{
HPDF_UINT idx = (HPDF_INT)pdf->pdf_version;
HPDF_PTRACE ((" WriteHeader\n"));
if (HPDF_Stream_WriteStr (stream, HPDF_VERSION_STR[idx]) != HPDF_OK)
return pdf->error.error_no;
return HPDF_OK;
}
static HPDF_STATUS
PrepareTrailer (HPDF_Doc pdf)
{
HPDF_PTRACE ((" PrepareTrailer\n"));
if (HPDF_Dict_Add (pdf->trailer, "Root", pdf->catalog) != HPDF_OK)
return pdf->error.error_no;
if (HPDF_Dict_Add (pdf->trailer, "Info", pdf->info) != HPDF_OK)
return pdf->error.error_no;
return HPDF_OK;
}
HPDF_STATUS
HPDF_Doc_SetEncryptOn (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_Doc_SetEncryptOn\n"));
if (pdf->encrypt_on)
return HPDF_OK;
if (!pdf->encrypt_dict)
return HPDF_SetError (&pdf->error, HPDF_DOC_ENCRYPTDICT_NOT_FOUND,
0);
if (pdf->encrypt_dict->header.obj_id == HPDF_OTYPE_NONE)
if (HPDF_Xref_Add (pdf->xref, pdf->encrypt_dict) != HPDF_OK)
return pdf->error.error_no;
if (HPDF_Dict_Add (pdf->trailer, "Encrypt", pdf->encrypt_dict) != HPDF_OK)
return pdf->error.error_no;
pdf->encrypt_on = HPDF_TRUE;
return HPDF_OK;
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_SetPassword (HPDF_Doc pdf,
const char *owner_passwd,
const char *user_passwd)
{
HPDF_PTRACE ((" HPDF_SetPassword\n"));
if (!HPDF_HasDoc (pdf))
return HPDF_DOC_INVALID_OBJECT;
if (!pdf->encrypt_dict) {
pdf->encrypt_dict = HPDF_EncryptDict_New (pdf->mmgr, pdf->xref);
if (!pdf->encrypt_dict)
return HPDF_CheckError (&pdf->error);
}
if (HPDF_EncryptDict_SetPassword (pdf->encrypt_dict, owner_passwd,
user_passwd) != HPDF_OK)
return HPDF_CheckError (&pdf->error);
return HPDF_Doc_SetEncryptOn (pdf);
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_SetPermission (HPDF_Doc pdf,
HPDF_UINT permission)
{
HPDF_Encrypt e;
HPDF_PTRACE ((" HPDF_SetPermission\n"));
if (!HPDF_HasDoc (pdf))
return HPDF_DOC_INVALID_OBJECT;
e = HPDF_EncryptDict_GetAttr (pdf->encrypt_dict);
if (!e)
return HPDF_RaiseError (&pdf->error,
HPDF_DOC_ENCRYPTDICT_NOT_FOUND, 0);
else
e->permission = permission;
return HPDF_OK;
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_SetEncryptionMode (HPDF_Doc pdf,
HPDF_EncryptMode mode,
HPDF_UINT key_len)
{
HPDF_Encrypt e;
HPDF_PTRACE ((" HPDF_SetEncryptionMode\n"));
if (!HPDF_Doc_Validate (pdf))
return HPDF_DOC_INVALID_OBJECT;
e = HPDF_EncryptDict_GetAttr (pdf->encrypt_dict);
if (!e)
return HPDF_RaiseError (&pdf->error,
HPDF_DOC_ENCRYPTDICT_NOT_FOUND, 0);
else {
if (mode == HPDF_ENCRYPT_R2)
e->key_len = 5;
else {
/* if encryption mode is specified revision-3, the version of
* pdf file is set to 1.4
*/
if (pdf->pdf_version < HPDF_VER_14)
pdf->pdf_version = HPDF_VER_14;
if (key_len >= 5 && key_len <= 16)
e->key_len = key_len;
else if (key_len == 0)
e->key_len = 16;
else
return HPDF_RaiseError (&pdf->error,
HPDF_INVALID_ENCRYPT_KEY_LEN, 0);
}
e->mode = mode;
}
return HPDF_OK;
}
HPDF_STATUS
HPDF_Doc_SetEncryptOff (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_Doc_SetEncryptOff\n"));
if (!pdf->encrypt_on)
return HPDF_OK;
/* if encrypy-dict object is registered to cross-reference-table,
* replace it to null-object.
* additionally remove encrypt-dict object from trailer-object.
*/
if (pdf->encrypt_dict) {
HPDF_UINT obj_id = pdf->encrypt_dict->header.obj_id;
if (obj_id & HPDF_OTYPE_INDIRECT) {
HPDF_XrefEntry entry;
HPDF_Null null_obj;
HPDF_Dict_RemoveElement (pdf->trailer, "Encrypt");
entry = HPDF_Xref_GetEntryByObjectId (pdf->xref,
obj_id & 0x00FFFFFF);
if (!entry) {
return HPDF_SetError (&pdf->error,
HPDF_DOC_ENCRYPTDICT_NOT_FOUND, 0);
}
null_obj = HPDF_Null_New (pdf->mmgr);
if (!null_obj)
return pdf->error.error_no;
entry->obj = null_obj;
null_obj->header.obj_id = obj_id | HPDF_OTYPE_INDIRECT;
pdf->encrypt_dict->header.obj_id = HPDF_OTYPE_NONE;
}
}
pdf->encrypt_on = HPDF_FALSE;
return HPDF_OK;
}
HPDF_STATUS
HPDF_Doc_PrepareEncryption (HPDF_Doc pdf)
{
HPDF_Encrypt e= HPDF_EncryptDict_GetAttr (pdf->encrypt_dict);
HPDF_Dict info = GetInfo (pdf);
HPDF_Array id;
if (!e)
return HPDF_DOC_ENCRYPTDICT_NOT_FOUND;
if (!info)
return pdf->error.error_no;
if (HPDF_EncryptDict_Prepare (pdf->encrypt_dict, info, pdf->xref) !=
HPDF_OK)
return pdf->error.error_no;
/* reset 'ID' to trailer-dictionary */
id = HPDF_Dict_GetItem (pdf->trailer, "ID", HPDF_OCLASS_ARRAY);
if (!id) {
id = HPDF_Array_New (pdf->mmgr);
if (!id || HPDF_Dict_Add (pdf->trailer, "ID", id) != HPDF_OK)
return pdf->error.error_no;
} else
HPDF_Array_Clear (id);
if (HPDF_Array_Add (id, HPDF_Binary_New (pdf->mmgr, e->encrypt_id,
HPDF_ID_LEN)) != HPDF_OK)
return pdf->error.error_no;
if (HPDF_Array_Add (id, HPDF_Binary_New (pdf->mmgr, e->encrypt_id,
HPDF_ID_LEN)) != HPDF_OK)
return pdf->error.error_no;
return HPDF_OK;
}
static HPDF_STATUS
InternalSaveToStream (HPDF_Doc pdf,
HPDF_Stream stream)
{
HPDF_STATUS ret;
if ((ret = WriteHeader (pdf, stream)) != HPDF_OK)
return ret;
/* prepare trailer */
if ((ret = PrepareTrailer (pdf)) != HPDF_OK)
return ret;
/* prepare encription */
if (pdf->encrypt_on) {
HPDF_Encrypt e= HPDF_EncryptDict_GetAttr (pdf->encrypt_dict);
if ((ret = HPDF_Doc_PrepareEncryption (pdf)) != HPDF_OK)
return ret;
if ((ret = HPDF_Xref_WriteToStream (pdf->xref, stream, e)) != HPDF_OK)
return ret;
} else {
if ((ret = HPDF_Xref_WriteToStream (pdf->xref, stream, NULL)) !=
HPDF_OK)
return ret;
}
return HPDF_OK;
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_SaveToStream (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_SaveToStream\n"));
if (!HPDF_HasDoc (pdf))
return HPDF_INVALID_DOCUMENT;
if (!pdf->stream)
pdf->stream = HPDF_MemStream_New (pdf->mmgr, HPDF_STREAM_BUF_SIZ);
if (!HPDF_Stream_Validate (pdf->stream))
return HPDF_RaiseError (&pdf->error, HPDF_INVALID_STREAM, 0);
HPDF_MemStream_FreeData (pdf->stream);
if (InternalSaveToStream (pdf, pdf->stream) != HPDF_OK)
return HPDF_CheckError (&pdf->error);
return HPDF_OK;
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_GetContents (HPDF_Doc pdf,
HPDF_BYTE *buf,
HPDF_UINT32 *size)
{
HPDF_Stream stream;
HPDF_UINT isize = *size;
HPDF_STATUS ret;
HPDF_PTRACE ((" HPDF_GetContents\n"));
if (!HPDF_HasDoc (pdf)) {
return HPDF_INVALID_DOCUMENT;
}
stream = HPDF_MemStream_New (pdf->mmgr, HPDF_STREAM_BUF_SIZ);
if (!stream) {
return HPDF_CheckError (&pdf->error);
}
if (InternalSaveToStream (pdf, stream) != HPDF_OK) {
HPDF_Stream_Free (stream);
return HPDF_CheckError (&pdf->error);
}
ret = HPDF_Stream_Read (stream, buf, &isize);
*size = isize;
HPDF_Stream_Free (stream);
return ret;
}
HPDF_EXPORT(HPDF_UINT32)
HPDF_GetStreamSize (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_GetStreamSize\n"));
if (!HPDF_HasDoc (pdf))
return HPDF_INVALID_DOCUMENT;
if (!HPDF_Stream_Validate (pdf->stream))
return 0;
return HPDF_Stream_Size(pdf->stream);
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_ReadFromStream (HPDF_Doc pdf,
HPDF_BYTE *buf,
HPDF_UINT32 *size)
{
HPDF_UINT isize = *size;
HPDF_STATUS ret;
if (!HPDF_HasDoc (pdf))
return HPDF_INVALID_DOCUMENT;
if (!HPDF_Stream_Validate (pdf->stream))
return HPDF_RaiseError (&pdf->error, HPDF_INVALID_OPERATION, 0);
if (*size == 0)
return HPDF_RaiseError (&pdf->error, HPDF_INVALID_PARAMETER, 0);
ret = HPDF_Stream_Read (pdf->stream, buf, &isize);
*size = isize;
if (ret != HPDF_OK)
HPDF_CheckError (&pdf->error);
return ret;
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_ResetStream (HPDF_Doc pdf)
{
if (!HPDF_HasDoc (pdf))
return HPDF_INVALID_DOCUMENT;
if (!HPDF_Stream_Validate (pdf->stream))
return HPDF_RaiseError (&pdf->error, HPDF_INVALID_OPERATION, 0);
return HPDF_Stream_Seek (pdf->stream, 0, HPDF_SEEK_SET);
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_SaveToFile (HPDF_Doc pdf,
const char *file_name)
{
HPDF_Stream stream;
HPDF_PTRACE ((" HPDF_SaveToFile\n"));
if (!HPDF_HasDoc (pdf))
return HPDF_INVALID_DOCUMENT;
stream = HPDF_FileWriter_New (pdf->mmgr, file_name);
if (!stream)
return HPDF_CheckError (&pdf->error);
InternalSaveToStream (pdf, stream);
HPDF_Stream_Free (stream);
return HPDF_CheckError (&pdf->error);
}
HPDF_EXPORT(HPDF_Page)
HPDF_GetCurrentPage (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_GetCurrentPage\n"));
if (!HPDF_HasDoc (pdf))
return NULL;
return pdf->cur_page;
}
HPDF_EXPORT(HPDF_Page)
HPDF_GetPageByIndex (HPDF_Doc pdf,
HPDF_UINT index)
{
HPDF_Page ret;
HPDF_PTRACE ((" HPDF_GetPageByIndex\n"));
if (!HPDF_HasDoc (pdf))
return NULL;
ret = HPDF_List_ItemAt (pdf->page_list, index);
if (!ret) {
HPDF_RaiseError (&pdf->error, HPDF_INVALID_PAGE_INDEX, 0);
return NULL;
}
return ret;
}
HPDF_Pages
HPDF_Doc_GetCurrentPages (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_GetCurrentPages\n"));
if (!HPDF_HasDoc (pdf))
return NULL;
return pdf->cur_pages;
}
HPDF_STATUS
HPDF_Doc_SetCurrentPages (HPDF_Doc pdf,
HPDF_Pages pages)
{
HPDF_PTRACE ((" HPDF_Doc_SetCurrentPages\n"));
if (!HPDF_HasDoc (pdf))
return HPDF_INVALID_DOCUMENT;
if (!HPDF_Pages_Validate (pages))
return HPDF_SetError (&pdf->error, HPDF_INVALID_PAGES, 0);
/* check whether the pages belong to the pdf */
if (pdf->mmgr != pages->mmgr)
return HPDF_SetError (&pdf->error, HPDF_INVALID_PAGES, 0);
pdf->cur_pages = pages;
return HPDF_OK;
}
HPDF_STATUS
HPDF_Doc_SetCurrentPage (HPDF_Doc pdf,
HPDF_Page page)
{
HPDF_PTRACE ((" HPDF_Doc_SetCurrentPage\n"));
if (!HPDF_HasDoc (pdf))
return HPDF_INVALID_DOCUMENT;
if (!HPDF_Page_Validate (page))
return HPDF_SetError (&pdf->error, HPDF_INVALID_PAGE, 0);
/* check whether the page belong to the pdf */
if (pdf->mmgr != page->mmgr)
return HPDF_SetError (&pdf->error, HPDF_INVALID_PAGE, 0);
pdf->cur_page = page;
return HPDF_OK;
}
HPDF_EXPORT(HPDF_Page)
HPDF_AddPage (HPDF_Doc pdf)
{
HPDF_Page page;
HPDF_STATUS ret;
HPDF_PTRACE ((" HPDF_AddPage\n"));
if (!HPDF_HasDoc (pdf))
return NULL;
if (pdf->page_per_pages) {
if (pdf->page_per_pages <= pdf->cur_page_num) {
pdf->cur_pages = HPDF_Doc_AddPagesTo (pdf, pdf->root_pages);
if (!pdf->cur_pages)
return NULL;
pdf->cur_page_num = 0;
}
}
page = HPDF_Page_New (pdf->mmgr, pdf->xref);
if (!page) {
HPDF_CheckError (&pdf->error);
return NULL;
}
if ((ret = HPDF_Pages_AddKids (pdf->cur_pages, page)) != HPDF_OK) {
HPDF_RaiseError (&pdf->error, ret, 0);
return NULL;
}
if ((ret = HPDF_List_Add (pdf->page_list, page)) != HPDF_OK) {
HPDF_RaiseError (&pdf->error, ret, 0);
return NULL;
}
pdf->cur_page = page;
if (pdf->compression_mode & HPDF_COMP_TEXT)
HPDF_Page_SetFilter (page, HPDF_STREAM_FILTER_FLATE_DECODE);
pdf->cur_page_num++;
return page;
}
HPDF_Pages
HPDF_Doc_AddPagesTo (HPDF_Doc pdf,
HPDF_Pages parent)
{
HPDF_Pages pages;
HPDF_PTRACE ((" HPDF_AddPagesTo\n"));
if (!HPDF_HasDoc (pdf))
return NULL;
if (!HPDF_Pages_Validate (parent)) {
HPDF_RaiseError (&pdf->error, HPDF_INVALID_PAGES, 0);
return NULL;
}
/* check whether the page belong to the pdf */
if (pdf->mmgr != parent->mmgr) {
HPDF_RaiseError (&pdf->error, HPDF_INVALID_PAGES, 0);
return NULL;
}
pages = HPDF_Pages_New (pdf->mmgr, parent, pdf->xref);
if (pages)
pdf->cur_pages = pages;
else
HPDF_CheckError (&pdf->error);
return pages;
}
HPDF_EXPORT(HPDF_Page)
HPDF_InsertPage (HPDF_Doc pdf,
HPDF_Page target)
{
HPDF_Page page;
HPDF_STATUS ret;
HPDF_PTRACE ((" HPDF_InsertPage\n"));
if (!HPDF_HasDoc (pdf))
return NULL;
if (!HPDF_Page_Validate (target)) {
HPDF_RaiseError (&pdf->error, HPDF_INVALID_PAGE, 0);
return NULL;
}
/* check whether the page belong to the pdf */
if (pdf->mmgr != target->mmgr) {
HPDF_RaiseError (&pdf->error, HPDF_INVALID_PAGE, 0);
return NULL;
}
page = HPDF_Page_New (pdf->mmgr, pdf->xref);
if (!page) {
HPDF_CheckError (&pdf->error);
return NULL;
}
if ((ret = HPDF_Page_InsertBefore (page, target)) != HPDF_OK) {
HPDF_RaiseError (&pdf->error, ret, 0);
return NULL;
}
if ((ret = HPDF_List_Insert (pdf->page_list, target, page)) != HPDF_OK) {
HPDF_RaiseError (&pdf->error, ret, 0);
return NULL;
}
if (pdf->compression_mode & HPDF_COMP_TEXT)
HPDF_Page_SetFilter (page, HPDF_STREAM_FILTER_FLATE_DECODE);
return page;
}
HPDF_EXPORT(HPDF_STATUS)
HPDF_SetErrorHandler (HPDF_Doc pdf,
HPDF_Error_Handler user_error_fn)
{
if (!HPDF_Doc_Validate (pdf))
return HPDF_INVALID_DOCUMENT;
pdf->error.error_fn = user_error_fn;
return HPDF_OK;
}
/*----- font handling -------------------------------------------------------*/
static void