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leela.c
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leela.c
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/********************************************************************\
Leela - a CLI frontend for the poppler-glib libary of PDF tools
Copyright (C) 2012 Jesse McClure
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
\********************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <poppler.h>
#include <cairo.h>
#include <cairo-pdf.h>
typedef struct {
int *pages;
int npages;
PopplerDocument *pdf;
const char *out;
} Options;
typedef struct {
const char *name;
void (*func) (Options *);
const char *description;
} Command;
static const char *atypes[] = {
[POPPLER_ANNOT_FREE_TEXT] = "free text",
[POPPLER_ANNOT_TEXT] = "text",
[POPPLER_ANNOT_LINK] = "link",
[POPPLER_ANNOT_LINE] = "line",
[POPPLER_ANNOT_SQUARE] = "square",
[POPPLER_ANNOT_CIRCLE] = "circle",
[POPPLER_ANNOT_POLYGON] = "polygon",
[POPPLER_ANNOT_POLY_LINE] = "polyline",
[POPPLER_ANNOT_HIGHLIGHT] = "highlight",
[POPPLER_ANNOT_UNDERLINE] = "underline",
[POPPLER_ANNOT_SQUIGGLY] = "squiggly",
[POPPLER_ANNOT_STRIKE_OUT] = "strikeout",
[POPPLER_ANNOT_STAMP] = "stamp",
[POPPLER_ANNOT_CARET] = "caret",
[POPPLER_ANNOT_INK] = "ink",
[POPPLER_ANNOT_POPUP] = "popup",
[POPPLER_ANNOT_FILE_ATTACHMENT] = "file",
[POPPLER_ANNOT_SOUND] = "sound",
[POPPLER_ANNOT_MOVIE] = "movie",
[POPPLER_ANNOT_WIDGET] = "widget",
[POPPLER_ANNOT_SCREEN] = "screen",
[POPPLER_ANNOT_PRINTER_MARK] = "mark",
[POPPLER_ANNOT_TRAP_NET] = "trap net",
[POPPLER_ANNOT_WATERMARK] = "watermark",
[POPPLER_ANNOT_3D] = "3D",
[POPPLER_ANNOT_UNKNOWN] = "unknown",
};
static void leela_annot(Options *);
static void leela_append(Options *);
static void leela_attachment(Options *);
static void leela_data(Options *);
static void leela_help(Options *);
static void leela_images(Options *);
static void leela_pages(Options *);
static void leela_render(Options *);
static void leela_shrink(Options *);
static void leela_text(Options *);
static PopplerDocument *open_pdf(const char *);
static Command command[] = {
{ "annots", leela_annot,
"extract annotations in an xml format" },
{ "append", leela_append,
"append pages from input onto output" },
{ "attachments", leela_attachment,
"extract attacments from input into outputXXX [EXPERIMENTAL]" },
{ "data", leela_data,
"display data about pdf" },
{ "help", leela_help,
"show this help menu and exit" },
{ "images", leela_images,
"extract images from input into output" },
{ "pages", leela_pages,
"extract pages from input into output" },
{ "render", leela_render,
"render annotations onto output [EXPERIMENTAL]" },
{ "shrink", leela_shrink,
"render for screen, often reduces file size"},
{ "text", leela_text,
"extract text of pdf file" },
};
void leela_annot(Options *opt) {
PopplerPage *page;
PopplerColor *col;
PopplerRectangle *rect;
PopplerAnnot *annot;
GList *annots, *list;
gchar *text;
int i,j;
for (i = 0; i < opt->npages; i++) {
page = poppler_document_get_page(opt->pdf,opt->pages[i]);
annots = poppler_page_get_annot_mapping(page);
for (list = annots, j=0; list; list = list->next, j++) {
rect = &((PopplerAnnotMapping *)list->data)->area;
annot = ((PopplerAnnotMapping *)list->data)->annot;
printf("<annot page=\"%d\" index=\"%d\" type=\"%s\">\n"
" <rect x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\"/>\n",
i,j,atypes[ poppler_annot_get_annot_type(annot)],
rect->x1,rect->y1,rect->x2,rect->y2);
if ( (text=poppler_annot_get_name(annot)) ) {
printf(" <name>%s</name>\n",text);
g_free(text);
}
if ( (col=poppler_annot_get_color(annot)) ) {
printf(" <color r=\"%d\" g=\"%d\" b=\"%d\"/>\n",
col->red,col->green,col->blue);
g_free(col);
}
if (POPPLER_IS_ANNOT_TEXT(annot)) {
PopplerAnnotText *atext = (PopplerAnnotText *) annot;
}
if (POPPLER_IS_ANNOT_FREE_TEXT(annot)) {
PopplerAnnotFreeText *ftext = (PopplerAnnotFreeText *) annot;
}
if (POPPLER_IS_ANNOT_FILE_ATTACHMENT(annot)) {
PopplerAnnotFileAttachment *file =
(PopplerAnnotFileAttachment *) annot;
}
if (POPPLER_IS_ANNOT_MOVIE(annot)) {
PopplerAnnotMovie *mov = (PopplerAnnotMovie *) annot;
}
if (POPPLER_IS_ANNOT_SCREEN(annot)) {
PopplerAnnotScreen *scr = (PopplerAnnotScreen *) annot;
}
if (POPPLER_IS_ANNOT_MARKUP(annot)) {
PopplerAnnotMarkup *mark = (PopplerAnnotMarkup *) annot;
if ( (text=poppler_annot_markup_get_label(mark)) ) {
printf(" <label>%s</label>\n",text);
g_free(text);
}
if ( (text=poppler_annot_markup_get_subject(mark)) ) {
printf(" <subject>%s</subject>\n",text);
g_free(text);
}
printf(" </markup>\n");
}
if ( (text=poppler_annot_get_contents(annot)) ) {
printf(" <text>%s</text>\n",text);
g_free(text);
}
printf("</annot>\n");
}
poppler_page_free_annot_mapping(annots);
}
return;
}
void leela_append(Options *opt) {
double pdfw,pdfh;
char tmpPDF[] = "file:///tmp/leela_XXXXXX";
mktemp(tmpPDF);
PopplerDocument *base = open_pdf(opt->out);
poppler_document_save_a_copy(base,tmpPDF,NULL);
base = open_pdf(tmpPDF+7);
PopplerPage *page = poppler_document_get_page(base,0);
poppler_page_get_size(page,&pdfw,&pdfh);
cairo_surface_t *t = cairo_pdf_surface_create(opt->out,pdfw,pdfh);
cairo_t *c = cairo_create(t);
cairo_surface_destroy(t);
/* loop through pages and render them to the out file */
int i, nbase = poppler_document_get_n_pages(base);
for (i = 0; i < nbase; i++) {
page = poppler_document_get_page(base,i);
poppler_page_get_size(page,&pdfw,&pdfh);
//cairo_pdf_surface_set_size(t,pdfw,pdfh);
poppler_page_render(page,c);
cairo_show_page(c);
}
page = poppler_document_get_page(opt->pdf,0);
poppler_page_get_size(page,&pdfw,&pdfh);
/* loop through pages and render them to the out file */
for (i = 0; i < opt->npages; i++) {
page = poppler_document_get_page(opt->pdf,opt->pages[i]);
poppler_page_get_size(page,&pdfw,&pdfh);
//cairo_pdf_surface_set_size(t,pdfw,pdfh);
poppler_page_render(page,c);
cairo_show_page(c);
}
cairo_destroy(c);
remove(tmpPDF+7);
}
void leela_attachment(Options *opt) {
int i;
GList *list = poppler_document_get_attachments(opt->pdf);
PopplerAttachment *att;
char *fname = (char *) calloc(strlen(opt->out)+6,sizeof(char));
strcpy(fname,opt->out);
char *c = fname + strlen(opt->out);
for (i = 0; list; i++, list = list->next) {
att = (PopplerAttachment *)list->data;
snprintf(c,5,"%03d",i);
poppler_attachment_save(att,fname,NULL);
}
free(fname);
g_list_free(list);
}
void leela_data(Options *opt) {
gchar *data=NULL;
time_t when = 0;
if (!opt->out)
data = poppler_document_get_metadata(opt->pdf);
else if (strncmp(opt->out,"title",5)==0)
data = poppler_document_get_title(opt->pdf);
else if (strncmp(opt->out,"author",6)==0)
data = poppler_document_get_author(opt->pdf);
else if (strncmp(opt->out,"subject",7)==0)
data = poppler_document_get_subject(opt->pdf);
else if (strncmp(opt->out,"keywords",7)==0)
data = poppler_document_get_keywords(opt->pdf);
else if (strncmp(opt->out,"creator",7)==0)
data = poppler_document_get_creator(opt->pdf);
else if (strncmp(opt->out,"producer",6)==0)
data = poppler_document_get_producer(opt->pdf);
else if (strncmp(opt->out,"created",7)==0)
when = poppler_document_get_creation_date(opt->pdf);
else if (strncmp(opt->out,"modified",5)==0)
when = poppler_document_get_modification_date(opt->pdf);
else
return;
if (when) {
data = (gchar *) malloc(30);
strftime(data,28,"%a %b %d %H:%M",localtime(&when));
}
if (data) {
printf("%s\n",data);
g_free(data);
}
}
void leela_help(Options *opt) {
int i;
printf(
"Leela v0.3 Copyright (C) 2012-2013 Jesse McClure\n"
"This program comes with ABSOLUTELY NO WARRANTY\n"
"This is free software, and you are welcome to redistribute\n"
"it under the conditions of the GPLv3 license.\n\n"
"USAGE: leela command [ n1 n2 ... nN ] pdf output\n"
" command command from the list below\n"
" n1...nN range of pages to act on (defaul=all)\n"
" pdf filename of input pdf file\n"
" output select output type or filename\n\n"
"COMMANDS:\n");
for (i = 0; i < sizeof(command)/sizeof(command[0]); i++)
printf(" %-11s %s\n",command[i].name,command[i].description);
printf("\nSee `man leela` for more information.\n\n");
exit(0);
}
void leela_images(Options *opt) {
PopplerPage *page;
PopplerRectangle *rect;
GList *images, *list;
gint img_id = 0;
cairo_surface_t *img;
cairo_surface_t *t = cairo_pdf_surface_create(opt->out,10,10);
cairo_t *c = cairo_create(t);
int i,j;
for (i = 0; i < opt->npages; i++) {
page = poppler_document_get_page(opt->pdf,opt->pages[i]);
images = poppler_page_get_image_mapping(page);
for (list = images, j=0; list; list = list->next, j++) {
rect = &((PopplerImageMapping *)list->data)->area;
img_id = ((PopplerImageMapping *)list->data)->image_id;
img = poppler_page_get_image(page,img_id);
cairo_pdf_surface_set_size(t,rect->x2 - rect->x1,rect->y2 - rect->y1);
cairo_set_source_surface(c,img,0,0);
cairo_paint(c);
cairo_show_page(c);
}
poppler_page_free_image_mapping(images);
}
cairo_surface_destroy(t);
cairo_destroy(c);
if (!img_id) {
printf("no images found.\n");
remove(opt->out);
}
}
static void leela_page_render(Options *opt,PopplerPrintFlags p) {
double pdfw,pdfh;
PopplerPage *page = poppler_document_get_page(opt->pdf,0);
poppler_page_get_size(page,&pdfw,&pdfh);
cairo_surface_t *t = cairo_pdf_surface_create(opt->out,pdfw,pdfh);
cairo_t *c = cairo_create(t);
cairo_surface_destroy(t);
/* loop through pages and render them to the out file */
int i;
for (i = 0; i < opt->npages; i++) {
page = poppler_document_get_page(opt->pdf,opt->pages[i]);
poppler_page_get_size(page,&pdfw,&pdfh);
//cairo_pdf_surface_set_size(t,pdfw,pdfh);
poppler_page_render_for_printing_with_options(page,c,p);
cairo_show_page(c);
}
cairo_destroy(c);
}
void leela_pages(Options *opt) {
if (!opt->npages)
printf("%d\n",poppler_document_get_n_pages(opt->pdf));
else
leela_page_render(opt,POPPLER_PRINT_DOCUMENT);
}
void leela_render(Options *opt) {
leela_page_render(opt,POPPLER_PRINT_ALL);
}
void leela_shrink(Options *opt) {
double pdfw,pdfh;
PopplerPage *page = poppler_document_get_page(opt->pdf,0);
poppler_page_get_size(page,&pdfw,&pdfh);
cairo_surface_t *t = cairo_pdf_surface_create(opt->out,pdfw,pdfh);
cairo_t *c = cairo_create(t);
cairo_surface_destroy(t);
/* loop through pages and render them to the out file */
int i;
for (i = 0; i < opt->npages; i++) {
page = poppler_document_get_page(opt->pdf,opt->pages[i]);
poppler_page_get_size(page,&pdfw,&pdfh);
//cairo_pdf_surface_set_size(t,pdfw,pdfh);
poppler_page_render(page,c);
cairo_show_page(c);
}
cairo_destroy(c);
}
void leela_text(Options *opt) {
int i;
FILE *out = stdout;
if (opt->out) out = fopen(opt->out,"w");
for (i = 0; i < opt->npages; i++) {
fprintf(out,"%s\n", poppler_page_get_text(poppler_document_get_page(
opt->pdf,opt->pages[i])) );
}
if (opt->out) fclose(out);
return;
}
PopplerDocument *open_pdf(const char *arg) {
char *fullpath = realpath(arg,NULL);
if (!fullpath) {
fprintf(stderr,"Cannot find file \"%s\"\n",arg);
exit(1);
}
char *uri = (char *) malloc(strlen(fullpath)+8);
strcpy(uri,"file://");
strcat(uri,fullpath);
free(fullpath);
PopplerDocument *pdf = poppler_document_new_from_file(uri,NULL,NULL);
free(uri);
return pdf;
}
int range(Options **opt_p,int argc, const char **argv) {
Options *opt = *opt_p;
int i;
for (i = 1; i < argc && argv[i][0] != ']'; i++) {
opt->pages = (int *) realloc(opt->pages,i*sizeof(int));
opt->pages[i-1] = atoi(argv[i]);
}
return (opt->npages=i-1)+1;
}
int range_all(Options **opt_p) {
Options *opt = *opt_p;
opt->npages = poppler_document_get_n_pages(opt->pdf);
int i;
opt->pages = (int *) malloc(opt->npages*sizeof(int));
for (i = 0; i < opt->npages; i++) opt->pages[i] = i;
}
int main(int argc, const char **argv) {
Options *opt = (Options *) calloc(1,sizeof(Options));
if (argc < 3) leela_help(opt);
int i;
for (i = 2; i < argc; i++) {
if (argv[i][0] == '[') i += range(&opt,argc-i,&argv[i]);
else if (!opt->pdf) opt->pdf = open_pdf(argv[i]);
else if (!opt->out) opt->out = argv[i];
else fprintf(stderr,"ignoring unrecognized parameter \"%s\"\n",argv[i]);
}
if (!opt->npages && strncmp(argv[1],"page",4)) range_all(&opt);
int max = poppler_document_get_n_pages(opt->pdf) - 1;
for (i = 0; i < opt->npages; i++) {
if (opt->pages[i] < 0) opt->pages[i] = 0;
if (opt->pages[i] > max) opt->pages[i] = max;
}
for (i = 0; i < sizeof(command)/sizeof(command[0]); i++)
if (strncmp(argv[1],command[i].name,strlen(argv[1]))==0)
command[i].func(opt);
if (opt->pages) free(opt->pages);
free(opt);
return 0;
}