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#include "fitz/fitz.h"
#include "pdf/mupdf.h"
#include "xps/muxps.h"
#include "document.h"
#include <ctype.h> // for tolower()
struct document *
open_document(char *filename)
{
fz_error error;
if (strstr(filename, ".pdf") || strstr(filename, ".PDF")) {
struct document *doc = fz_malloc(sizeof *doc);
memset(doc, 0, sizeof *doc);
doc->number = -1;
error = pdf_open_xref(&doc->pdf, filename, "");
if (error) {
fz_free(doc);
fz_rethrow(error, "cannot open pdf document");
return NULL;
}
error = pdf_load_page_tree(doc->pdf);
if (error) {
pdf_free_xref(doc->pdf);
fz_free(doc);
fz_rethrow(error, "cannot open pdf document");
return NULL;
}
return doc;
} else if (strstr(filename, ".xps") || strstr(filename, ".XPS")) {
struct document *doc = fz_malloc(sizeof *doc);
memset(doc, 0, sizeof *doc);
doc->number = -1;
error = xps_open_file(&doc->xps, filename);
if (error) {
fz_free(doc);
fz_rethrow(error, "cannot open xps document");
return NULL;
}
return doc;
} else {
fz_throw("unknown document format");
return NULL;
}
}
fz_outline *
load_outline(struct document *doc)
{
if (doc->pdf)
return pdf_load_outline(doc->pdf);
else if (doc->xps)
return xps_load_outline(doc->xps);
else
return NULL;
}
int
count_pages(struct document *doc)
{
if (doc->pdf)
return pdf_count_pages(doc->pdf);
else if (doc->xps)
return xps_count_pages(doc->xps);
else
return 1;
}
static void
load_page(struct document *doc, int number)
{
fz_error error;
if (doc->number == number)
return;
doc->number = number;
if (doc->pdf) {
if (doc->pdf_page) {
pdf_age_store(doc->pdf->store, 1);
pdf_free_page(doc->pdf_page);
}
doc->pdf_page = NULL;
printf("load pdf page %d\n", number);
error = pdf_load_page(&doc->pdf_page, doc->pdf, number);
if (error)
fz_catch(error, "cannot load page %d", number);
}
if (doc->xps) {
if (doc->xps_page)
xps_free_page(doc->xps, doc->xps_page);
doc->xps_page = NULL;
printf("load xps page %d\n", number);
error = xps_load_page(&doc->xps_page, doc->xps, number);
if (error)
fz_catch(error, "cannot load page %d", number);
}
}
void
measure_page(struct document *doc, int number, float *w, float *h)
{
load_page(doc, number);
if (doc->pdf_page) {
pdf_page *page = doc->pdf_page;
fz_rect mediabox = fz_transform_rect(fz_rotate(page->rotate), page->mediabox);
*w = mediabox.x1 - mediabox.x0;
*h = mediabox.y1 - mediabox.y0;
}
else if (doc->xps_page) {
xps_page *page = doc->xps_page;
*w = page->width * 72.0f / 96.0f;
*h = page->height * 72.0f / 96.0f;
}
else {
*w = *h = 72;
}
fz_flush_warnings();
}
void
draw_page(struct document *doc, int number, fz_device *dev, fz_matrix ctm)
{
load_page(doc, number);
if (doc->pdf_page) {
pdf_page *page = doc->pdf_page;
fz_matrix page_ctm = fz_concat(fz_rotate(-page->rotate), fz_scale(1, -1));
fz_rect mediabox = fz_transform_rect(page_ctm, page->mediabox);
page_ctm = fz_concat(page_ctm, fz_translate(-mediabox.x0, -mediabox.y0));
ctm = fz_concat(page_ctm, ctm);
pdf_run_page(doc->pdf, page, dev, ctm);
} else if (doc->xps_page) {
xps_page *page = doc->xps_page;
fz_matrix page_ctm = fz_scale(72.0f / 96.0f, 72.0f / 96.0f);
ctm = fz_concat(page_ctm, ctm);
doc->xps->dev = dev;
xps_parse_fixed_page(doc->xps, ctm, page);
doc->xps->dev = NULL;
}
fz_flush_warnings();
}
static int
charat(fz_text_span *span, int idx)
{
int ofs = 0;
while (span) {
if (idx < ofs + span->len)
return span->text[idx - ofs].c;
if (span->eol) {
if (idx == ofs + span->len)
return ' ';
ofs ++;
}
ofs += span->len;
span = span->next;
}
return 0;
}
static fz_bbox
bboxat(fz_text_span *span, int idx)
{
int ofs = 0;
while (span) {
if (idx < ofs + span->len)
return span->text[idx - ofs].bbox;
if (span->eol) {
if (idx == ofs + span->len)
return fz_empty_bbox;
ofs ++;
}
ofs += span->len;
span = span->next;
}
return fz_empty_bbox;
}
static int
textlen(fz_text_span *span)
{
int len = 0;
while (span) {
len += span->len;
if (span->eol)
len ++;
span = span->next;
}
return len;
}
static int
match(fz_text_span *span, char *s, int n)
{
int start = n, c;
while (*s) {
s += chartorune(&c, s);
if (c == ' ' && charat(span, n) == ' ') {
while (charat(span, n) == ' ')
n++;
} else {
if (tolower(c) != tolower(charat(span, n)))
return 0;
n++;
}
}
return n - start;
}
int
search_page(struct document *doc, int number, char *needle)
{
int pos, len, count = 0;
fz_text_span *text = fz_new_text_span();
fz_device *dev = fz_new_text_device(text);
draw_page(doc, number, dev, fz_identity);
fz_free_device(dev);
len = textlen(text);
for (pos = 0; pos < len; pos++) {
int n = match(text, needle, pos);
if (n) {
// TODO: extract bbox(es) into a result list
printf("found a match at page %d, pos %d!\n", number, pos);
count++;
}
}
fz_free_text_span(text);
return count;
}
void
close_document(struct document *doc)
{
if (doc->pdf) {
if (doc->pdf_page)
pdf_free_page(doc->pdf_page);
if (doc->pdf->store)
pdf_free_store(doc->pdf->store);
doc->pdf->store = NULL;
pdf_free_xref(doc->pdf);
}
if (doc->xps) {
if (doc->xps_page)
xps_free_page(doc->xps, doc->xps_page);
xps_free_context(doc->xps);
}
fz_flush_warnings();
}
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