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#include "fitz.h"
#include "mupdf.h"
void
pdf_freelink(pdf_link *link)
{
if (link->next)
pdf_freelink(link->next);
if (link->dest)
fz_dropobj(link->dest);
fz_free(link);
}
static fz_obj *
resolvedest(pdf_xref *xref, fz_obj *dest)
{
if (fz_isname(dest) || fz_isstring(dest))
{
dest = pdf_lookupdest(xref, dest);
return resolvedest(xref, dest);
}
else if (fz_isarray(dest))
{
return dest;
}
else if (fz_isdict(dest))
{
dest = fz_dictgets(dest, "D");
return resolvedest(xref, dest);
}
else if (fz_isindirect(dest))
return dest;
return nil;
}
pdf_link *
pdf_loadlink(pdf_xref *xref, fz_obj *dict)
{
fz_obj *dest;
fz_obj *action;
fz_obj *obj;
fz_rect bbox;
pdf_linkkind kind;
pdf_logpage("load link {\n");
dest = nil;
obj = fz_dictgets(dict, "Rect");
if (obj)
{
bbox = pdf_torect(obj);
pdf_logpage("rect [%g %g %g %g]\n",
bbox.x0, bbox.y0,
bbox.x1, bbox.y1);
}
else
bbox = fz_emptyrect;
obj = fz_dictgets(dict, "Dest");
if (obj)
{
kind = PDF_LGOTO;
dest = resolvedest(xref, obj);
pdf_logpage("dest (%d %d R)\n", fz_tonum(dest), fz_togen(dest));
}
action = fz_dictgets(dict, "A");
if (action)
{
obj = fz_dictgets(action, "S");
if (fz_isname(obj) && !strcmp(fz_toname(obj), "GoTo"))
{
kind = PDF_LGOTO;
dest = resolvedest(xref, fz_dictgets(action, "D"));
pdf_logpage("action goto (%d %d R)\n", fz_tonum(dest), fz_togen(dest));
}
else if (fz_isname(obj) && !strcmp(fz_toname(obj), "URI"))
{
kind = PDF_LURI;
dest = fz_dictgets(action, "URI");
pdf_logpage("action uri %s\n", fz_tostrbuf(dest));
}
else if (fz_isname(obj) && !strcmp(fz_toname(obj), "Launch"))
{
kind = PDF_LLAUNCH;
dest = fz_dictgets(action, "F");
pdf_logpage("action %s (%d %d R)\n", fz_toname(obj), fz_tonum(dest), fz_togen(dest));
}
else if (fz_isname(obj) && !strcmp(fz_toname(obj), "Named"))
{
kind = PDF_LNAMED;
dest = fz_dictgets(action, "N");
pdf_logpage("action %s (%d %d R)\n", fz_toname(obj), fz_tonum(dest), fz_togen(dest));
}
else if (fz_isname(obj) && (!strcmp(fz_toname(obj), "GoToR")))
{
kind = PDF_LACTION;
dest = action;
pdf_logpage("action %s (%d %d R)\n", fz_toname(obj), fz_tonum(dest), fz_togen(dest));
}
else
{
pdf_logpage("unhandled link action, ignoring link\n");
dest = nil;
}
}
pdf_logpage("}\n");
if (dest)
{
pdf_link *link = fz_malloc(sizeof(pdf_link));
link->kind = kind;
link->rect = bbox;
link->dest = fz_keepobj(dest);
link->next = nil;
return link;
}
return nil;
}
void
pdf_loadlinks(pdf_link **linkp, pdf_xref *xref, fz_obj *annots)
{
pdf_link *link, *head, *tail;
fz_obj *obj;
int i;
head = tail = nil;
link = nil;
pdf_logpage("load link annotations {\n");
for (i = 0; i < fz_arraylen(annots); i++)
{
obj = fz_arrayget(annots, i);
link = pdf_loadlink(xref, obj);
if (link)
{
if (!head)
head = tail = link;
else
{
tail->next = link;
tail = link;
}
}
}
pdf_logpage("}\n");
*linkp = head;
}
void
pdf_freeannot(pdf_annot *annot)
{
if (annot->next)
pdf_freeannot(annot->next);
if (annot->ap)
pdf_dropxobject(annot->ap);
if (annot->obj)
fz_dropobj(annot->obj);
fz_free(annot);
}
static void
pdf_transformannot(pdf_annot *annot)
{
fz_matrix matrix = annot->ap->matrix;
fz_rect bbox = annot->ap->bbox;
fz_rect rect = annot->rect;
float w, h, x, y;
bbox = fz_transformrect(matrix, bbox);
w = (rect.x1 - rect.x0) / (bbox.x1 - bbox.x0);
h = (rect.y1 - rect.y0) / (bbox.y1 - bbox.y0);
x = rect.x0 - bbox.x0;
y = rect.y0 - bbox.y0;
annot->matrix = fz_concat(fz_scale(w, h), fz_translate(x, y));
}
void
pdf_loadannots(pdf_annot **annotp, pdf_xref *xref, fz_obj *annots)
{
pdf_annot *annot, *head, *tail;
fz_obj *obj, *ap, *as, *n, *rect;
pdf_xobject *form;
fz_error error;
int i;
head = tail = nil;
annot = nil;
pdf_logpage("load appearance annotations {\n");
for (i = 0; i < fz_arraylen(annots); i++)
{
obj = fz_arrayget(annots, i);
rect = fz_dictgets(obj, "Rect");
ap = fz_dictgets(obj, "AP");
as = fz_dictgets(obj, "AS");
if (fz_isdict(ap))
{
n = fz_dictgets(ap, "N"); /* normal state */
/* lookup current state in sub-dictionary */
if (!pdf_isstream(xref, fz_tonum(n), fz_togen(n)))
n = fz_dictget(n, as);
if (pdf_isstream(xref, fz_tonum(n), fz_togen(n)))
{
error = pdf_loadxobject(&form, xref, n);
if (error)
{
fz_catch(error, "ignoring broken annotation");
continue;
}
annot = fz_malloc(sizeof(pdf_annot));
annot->obj = fz_keepobj(obj);
annot->rect = pdf_torect(rect);
annot->ap = form;
annot->next = nil;
pdf_transformannot(annot);
if (annot)
{
if (!head)
head = tail = annot;
else
{
tail->next = annot;
tail = annot;
}
}
}
}
}
pdf_logpage("}\n");
*annotp = head;
}
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