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#ifndef ARITFEX_EXTRACT_H
#define ARITFEX_EXTRACT_H
#include "extract_alloc.h"
#include "extract_buffer.h"
/* Functions for creating docx archives.
We can accept images and paragraphs of text from intermediate format data, for
example created by these commands:
mutool draw -F xmltext ...
gs -sDEVICE=txtwrite -dTextFormat=4 ...
Unless otherwise stated, all functions return 0 on success or -1 with errno
set.
*/
typedef struct extract_t extract_t;
/* State for processing a document. */
typedef enum
{
extract_format_ODT,
extract_format_DOCX
} extract_format_t;
int extract_begin(
extract_alloc_t* alloc,
extract_format_t format,
extract_t** pextract
);
/* Creates a new extract_t* for use by other extract_*() functions. All
allocation will be done with <alloc> (which can be NULL in which case we use
malloc/free, or from extract_alloc_create()). */
int extract_read_intermediate(
extract_t* extract,
extract_buffer_t* buffer,
int autosplit
);
/* Reads XML specification of spans and images from <buffer> and adds to
<extract>.
(Makes internal calls to extract_span_begin(), extract_add_image() etc.) */
int extract_page_begin(extract_t* extract);
/* Must be called before extract_span_begin(). */
int extract_span_begin(
extract_t* extract,
const char* font_name,
int font_bold,
int font_italic,
int wmode,
double ctm_a,
double ctm_b,
double ctm_c,
double ctm_d,
double ctm_e,
double ctm_f,
double trm_a,
double trm_b,
double trm_c,
double trm_d,
double trm_e,
double trm_f
);
/* Starts a new span.
extract
As passed to earlier call to extract_begin().
font_name
.
font_bold
0 or 1.
font_italic
0 or 1.
wmode
0 or 1.
ctm_*
Matrix values.
trm_*
Matrix values.
*/
int extract_add_char(
extract_t* extract,
double x,
double y,
unsigned ucs,
double adv,
int autosplit
);
/* Appends specified character to current span.
extract
As passed to earlier call to extract_begin().
autosplit
x
y
Position on page.
ucs
Unicode value.
adv
Advance of this character.
autosplit
If non-zero, we do additional splitting to stress the join algorithm.
*/
int extract_span_end(extract_t* extract);
/* Must be called before starting a new span or ending current page. */
typedef void (*extract_image_data_free)(void* handle, void* image_data);
/* Callback for freeing image data. See extract_add_image(). */
int extract_add_image(
extract_t* extract,
const char* type,
double x,
double y,
double w,
double h,
void* data,
size_t data_size,
extract_image_data_free data_free,
void* data_free_handle
);
/* Adds an image to the current page.
type
E.g. 'png'. Is copied so need to persist after we return.
x y w h
Location and size of image.
data data_size
The raw image data.
data_free
If not NULL, extract code will call data_free(data) when it has finished
with <data>. Otherwise the lifetime of <data> is the responsibility of the
caller and it must persist for at least the lifetime of <extract>.
*/
int extract_page_end(extract_t* extract);
/* Must be called to finish page started by extract_page_begin(). */
int extract_process(
extract_t* extract,
int spacing,
int rotation,
int images
);
/* Evaluates all un-processed pages to generate docx data and frees internal
page data (individual spans, lines, paragraphs etc). E.g. call this after
extract_page_end() to reduce internal data use. */
int extract_write(extract_t* extract, extract_buffer_t* buffer);
/* Writes docx archive to buffer. The docx archive will contain text and images
from extract_process().
Uses an internal template docx archive. */
int extract_write_content(extract_t* extract, extract_buffer_t* buffer);
/* Writes docx xml for paragraphs into buffer.
(This is the xml containing paragraphs of text that is inserted into
the template word/document.xml object within the docx zip archive by
extract_write()). */
int extract_write_template(
extract_t* extract,
const char* path_template,
const char* path_out,
int preserve_dir
);
/* Like extract_write() but uses a provided template document.
Uses the 'zip' and 'unzip' commands internally.
extract:
.
path_template:
Name of docx file to use as a template.
path_out:
Name of docx file to create. Must not contain single-quote, double quote,
space or ".." sequence - these will force EINVAL error because they could
make internal shell commands unsafe.
preserve_dir:
If true, we don't delete the temporary directory <path_out>.dir containing
*/
void extract_end( extract_t** pextract);
/* Frees all data associated with *pextract and sets *pextract to NULL. */
void extract_internal_end(void);
/* Cleans up internal singelton state that can look like a memory leak when
running under Memento or valgrind. */
void extract_exp_min(extract_t* extract, size_t size);
/* If size is non-zero, sets minimum actual allocation size, and we only
allocate in powers of two times this size. This is an attempt to improve speed
with memento squeeze. Default is 0 (every call to extract_realloc() calls
realloc(). */
#endif
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