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//========================================================================
//
// Link.cc
//
// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2006, 2008 Pino Toscano <pino@kde.org>
// Copyright (C) 2007,2010 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2008 Hugo Mercier <hmercier31@gmail.com>
// Copyright (C) 2008-2010 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2009 Kovid Goyal <kovid@kovidgoyal.net>
// Copyright (C) 2009 Ilya Gorenbein <igorenbein@finjan.com>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
#include <config.h>
#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif
#include <stddef.h>
#include <string.h>
#include "goo/gmem.h"
#include "goo/GooString.h"
#include "goo/GooList.h"
#include "Error.h"
#include "Object.h"
#include "Array.h"
#include "Dict.h"
#include "Link.h"
#include "Sound.h"
#include "FileSpec.h"
#include "Rendition.h"
//------------------------------------------------------------------------
// LinkAction
//------------------------------------------------------------------------
LinkAction *LinkAction::parseDest(Object *obj) {
LinkAction *action;
action = new LinkGoTo(obj);
if (!action->isOk()) {
delete action;
return NULL;
}
return action;
}
LinkAction *LinkAction::parseAction(Object *obj, GooString *baseURI) {
LinkAction *action;
Object obj2, obj3, obj4;
if (!obj->isDict()) {
error(-1, "parseAction: Bad annotation action for URI '%s'",
baseURI ? baseURI->getCString() : "NULL");
return NULL;
}
obj->dictLookup("S", &obj2);
// GoTo action
if (obj2.isName("GoTo")) {
obj->dictLookup("D", &obj3);
action = new LinkGoTo(&obj3);
obj3.free();
// GoToR action
} else if (obj2.isName("GoToR")) {
obj->dictLookup("F", &obj3);
obj->dictLookup("D", &obj4);
action = new LinkGoToR(&obj3, &obj4);
obj3.free();
obj4.free();
// Launch action
} else if (obj2.isName("Launch")) {
action = new LinkLaunch(obj);
// URI action
} else if (obj2.isName("URI")) {
obj->dictLookup("URI", &obj3);
action = new LinkURI(&obj3, baseURI);
obj3.free();
// Named action
} else if (obj2.isName("Named")) {
obj->dictLookup("N", &obj3);
action = new LinkNamed(&obj3);
obj3.free();
// Movie action
} else if (obj2.isName("Movie")) {
action = new LinkMovie(obj);
// Rendition action
} else if (obj2.isName("Rendition")) {
action = new LinkRendition(obj);
// Sound action
} else if (obj2.isName("Sound")) {
action = new LinkSound(obj);
// JavaScript action
} else if (obj2.isName("JavaScript")) {
obj->dictLookup("JS", &obj3);
action = new LinkJavaScript(&obj3);
obj3.free();
// Set-OCG-State action
} else if (obj2.isName("SetOCGState")) {
action = new LinkOCGState(obj);
// unknown action
} else if (obj2.isName()) {
action = new LinkUnknown(obj2.getName());
// action is missing or wrong type
} else {
error(-1, "parseAction: Unknown annotation action object: URI = '%s'",
baseURI ? baseURI->getCString() : "NULL");
action = NULL;
}
obj2.free();
if (action && !action->isOk()) {
delete action;
return NULL;
}
return action;
}
//------------------------------------------------------------------------
// LinkDest
//------------------------------------------------------------------------
LinkDest::LinkDest(Array *a) {
Object obj1, obj2;
// initialize fields
left = bottom = right = top = zoom = 0;
changeLeft = changeTop = changeZoom = gFalse;
ok = gFalse;
// get page
if (a->getLength() < 2) {
error(-1, "Annotation destination array is too short");
return;
}
a->getNF(0, &obj1);
if (obj1.isInt()) {
pageNum = obj1.getInt() + 1;
pageIsRef = gFalse;
} else if (obj1.isRef()) {
pageRef.num = obj1.getRefNum();
pageRef.gen = obj1.getRefGen();
pageIsRef = gTrue;
} else {
error(-1, "Bad annotation destination");
goto err2;
}
obj1.free();
// get destination type
a->get(1, &obj1);
// XYZ link
if (obj1.isName("XYZ")) {
kind = destXYZ;
if (a->getLength() < 3) {
changeLeft = gFalse;
} else {
a->get(2, &obj2);
if (obj2.isNull()) {
changeLeft = gFalse;
} else if (obj2.isNum()) {
changeLeft = gTrue;
left = obj2.getNum();
} else {
error(-1, "Bad annotation destination position");
goto err1;
}
obj2.free();
}
if (a->getLength() < 4) {
changeTop = gFalse;
} else {
a->get(3, &obj2);
if (obj2.isNull()) {
changeTop = gFalse;
} else if (obj2.isNum()) {
changeTop = gTrue;
top = obj2.getNum();
} else {
error(-1, "Bad annotation destination position");
goto err1;
}
obj2.free();
}
if (a->getLength() < 5) {
changeZoom = gFalse;
} else {
a->get(4, &obj2);
if (obj2.isNull()) {
changeZoom = gFalse;
} else if (obj2.isNum()) {
changeZoom = gTrue;
zoom = obj2.getNum();
} else {
error(-1, "Bad annotation destination position");
goto err1;
}
obj2.free();
}
// Fit link
} else if (obj1.isName("Fit")) {
if (a->getLength() < 2) {
error(-1, "Annotation destination array is too short");
goto err2;
}
kind = destFit;
// FitH link
} else if (obj1.isName("FitH")) {
if (a->getLength() < 3) {
error(-1, "Annotation destination array is too short");
goto err2;
}
kind = destFitH;
a->get(2, &obj2);
if (obj2.isNull()) {
changeTop = gFalse;
} else if (obj2.isNum()) {
changeTop = gTrue;
top = obj2.getNum();
} else {
error(-1, "Bad annotation destination position");
kind = destFit;
}
obj2.free();
// FitV link
} else if (obj1.isName("FitV")) {
if (a->getLength() < 3) {
error(-1, "Annotation destination array is too short");
goto err2;
}
kind = destFitV;
a->get(2, &obj2);
if (obj2.isNull()) {
changeLeft = gFalse;
} else if (obj2.isNum()) {
changeLeft = gTrue;
left = obj2.getNum();
} else {
error(-1, "Bad annotation destination position");
kind = destFit;
}
obj2.free();
// FitR link
} else if (obj1.isName("FitR")) {
if (a->getLength() < 6) {
error(-1, "Annotation destination array is too short");
goto err2;
}
kind = destFitR;
if (!a->get(2, &obj2)->isNum()) {
error(-1, "Bad annotation destination position");
kind = destFit;
}
left = obj2.getNum();
obj2.free();
if (!a->get(3, &obj2)->isNum()) {
error(-1, "Bad annotation destination position");
kind = destFit;
}
bottom = obj2.getNum();
obj2.free();
if (!a->get(4, &obj2)->isNum()) {
error(-1, "Bad annotation destination position");
kind = destFit;
}
right = obj2.getNum();
obj2.free();
if (!a->get(5, &obj2)->isNum()) {
error(-1, "Bad annotation destination position");
kind = destFit;
}
top = obj2.getNum();
obj2.free();
// FitB link
} else if (obj1.isName("FitB")) {
if (a->getLength() < 2) {
error(-1, "Annotation destination array is too short");
goto err2;
}
kind = destFitB;
// FitBH link
} else if (obj1.isName("FitBH")) {
if (a->getLength() < 3) {
error(-1, "Annotation destination array is too short");
goto err2;
}
kind = destFitBH;
a->get(2, &obj2);
if (obj2.isNull()) {
changeTop = gFalse;
} else if (obj2.isNum()) {
changeTop = gTrue;
top = obj2.getNum();
} else {
error(-1, "Bad annotation destination position");
kind = destFit;
}
obj2.free();
// FitBV link
} else if (obj1.isName("FitBV")) {
if (a->getLength() < 3) {
error(-1, "Annotation destination array is too short");
goto err2;
}
kind = destFitBV;
a->get(2, &obj2);
if (obj2.isNull()) {
changeLeft = gFalse;
} else if (obj2.isNum()) {
changeLeft = gTrue;
left = obj2.getNum();
} else {
error(-1, "Bad annotation destination position");
kind = destFit;
}
obj2.free();
// unknown link kind
} else {
error(-1, "Unknown annotation destination type");
goto err2;
}
obj1.free();
ok = gTrue;
return;
err1:
obj2.free();
err2:
obj1.free();
}
LinkDest::LinkDest(LinkDest *dest) {
kind = dest->kind;
pageIsRef = dest->pageIsRef;
if (pageIsRef)
pageRef = dest->pageRef;
else
pageNum = dest->pageNum;
left = dest->left;
bottom = dest->bottom;
right = dest->right;
top = dest->top;
zoom = dest->zoom;
changeLeft = dest->changeLeft;
changeTop = dest->changeTop;
changeZoom = dest->changeZoom;
ok = gTrue;
}
//------------------------------------------------------------------------
// LinkGoTo
//------------------------------------------------------------------------
LinkGoTo::LinkGoTo(Object *destObj) {
dest = NULL;
namedDest = NULL;
// named destination
if (destObj->isName()) {
namedDest = new GooString(destObj->getName());
} else if (destObj->isString()) {
namedDest = destObj->getString()->copy();
// destination dictionary
} else if (destObj->isArray()) {
dest = new LinkDest(destObj->getArray());
if (!dest->isOk()) {
delete dest;
dest = NULL;
}
// error
} else {
error(-1, "Illegal annotation destination");
}
}
LinkGoTo::~LinkGoTo() {
if (dest)
delete dest;
if (namedDest)
delete namedDest;
}
//------------------------------------------------------------------------
// LinkGoToR
//------------------------------------------------------------------------
LinkGoToR::LinkGoToR(Object *fileSpecObj, Object *destObj) {
fileName = NULL;
dest = NULL;
namedDest = NULL;
// get file name
Object obj1;
if (getFileSpecNameForPlatform (fileSpecObj, &obj1)) {
fileName = obj1.getString()->copy();
obj1.free();
}
// named destination
if (destObj->isName()) {
namedDest = new GooString(destObj->getName());
} else if (destObj->isString()) {
namedDest = destObj->getString()->copy();
// destination dictionary
} else if (destObj->isArray()) {
dest = new LinkDest(destObj->getArray());
if (!dest->isOk()) {
delete dest;
dest = NULL;
}
// error
} else {
error(-1, "Illegal annotation destination");
}
}
LinkGoToR::~LinkGoToR() {
if (fileName)
delete fileName;
if (dest)
delete dest;
if (namedDest)
delete namedDest;
}
//------------------------------------------------------------------------
// LinkLaunch
//------------------------------------------------------------------------
LinkLaunch::LinkLaunch(Object *actionObj) {
Object obj1, obj2, obj3;
fileName = NULL;
params = NULL;
if (actionObj->isDict()) {
if (!actionObj->dictLookup("F", &obj1)->isNull()) {
if (getFileSpecNameForPlatform (&obj1, &obj3)) {
fileName = obj3.getString()->copy();
obj3.free();
}
} else {
obj1.free();
#ifdef _WIN32
if (actionObj->dictLookup("Win", &obj1)->isDict()) {
obj1.dictLookup("F", &obj2);
if (getFileSpecNameForPlatform (&obj2, &obj3)) {
fileName = obj3.getString()->copy();
obj3.free();
}
obj2.free();
if (obj1.dictLookup("P", &obj2)->isString()) {
params = obj2.getString()->copy();
}
obj2.free();
} else {
error(-1, "Bad launch-type link action");
}
#else
//~ This hasn't been defined by Adobe yet, so assume it looks
//~ just like the Win dictionary until they say otherwise.
if (actionObj->dictLookup("Unix", &obj1)->isDict()) {
obj1.dictLookup("F", &obj2);
if (getFileSpecNameForPlatform (&obj2, &obj3)) {
fileName = obj3.getString()->copy();
obj3.free();
}
obj2.free();
if (obj1.dictLookup("P", &obj2)->isString()) {
params = obj2.getString()->copy();
}
obj2.free();
} else {
error(-1, "Bad launch-type link action");
}
#endif
}
obj1.free();
}
}
LinkLaunch::~LinkLaunch() {
if (fileName)
delete fileName;
if (params)
delete params;
}
//------------------------------------------------------------------------
// LinkURI
//------------------------------------------------------------------------
LinkURI::LinkURI(Object *uriObj, GooString *baseURI) {
GooString *uri2;
int n;
char c;
uri = NULL;
if (uriObj->isString()) {
uri2 = uriObj->getString()->copy();
if (baseURI && baseURI->getLength() > 0) {
n = strcspn(uri2->getCString(), "/:");
if (n == uri2->getLength() || uri2->getChar(n) == '/') {
uri = baseURI->copy();
c = uri->getChar(uri->getLength() - 1);
if (c == '/' || c == '?') {
if (uri2->getChar(0) == '/') {
uri2->del(0);
}
} else {
if (uri2->getChar(0) != '/') {
uri->append('/');
}
}
uri->append(uri2);
delete uri2;
} else {
uri = uri2;
}
} else {
uri = uri2;
}
} else {
error(-1, "Illegal URI-type link");
}
}
LinkURI::~LinkURI() {
if (uri)
delete uri;
}
//------------------------------------------------------------------------
// LinkNamed
//------------------------------------------------------------------------
LinkNamed::LinkNamed(Object *nameObj) {
name = NULL;
if (nameObj->isName()) {
name = new GooString(nameObj->getName());
}
}
LinkNamed::~LinkNamed() {
if (name) {
delete name;
}
}
//------------------------------------------------------------------------
// LinkMovie
//------------------------------------------------------------------------
LinkMovie::LinkMovie(Object *obj) {
annotRef.num = -1;
annotTitle = NULL;
Object tmp;
if (obj->dictLookupNF("Annotation", &tmp)->isRef()) {
annotRef = tmp.getRef();
}
tmp.free();
if (obj->dictLookup("T", &tmp)->isString()) {
annotTitle = tmp.getString()->copy();
}
tmp.free();
if ((annotTitle == NULL) && (annotRef.num == -1)) {
error(-1, "Movie action is missing both the Annot and T keys");
}
if (obj->dictLookup("Operation", &tmp)->isName()) {
char *name = tmp.getName();
if (!strcmp(name, "Play")) {
operation = operationTypePlay;
}
else if (!strcmp(name, "Stop")) {
operation = operationTypeStop;
}
else if (!strcmp(name, "Pause")) {
operation = operationTypePause;
}
else if (!strcmp(name, "Resume")) {
operation = operationTypeResume;
}
}
tmp.free();
}
LinkMovie::~LinkMovie() {
if (annotTitle) {
delete annotTitle;
}
}
//------------------------------------------------------------------------
// LinkSound
//------------------------------------------------------------------------
LinkSound::LinkSound(Object *soundObj) {
volume = 1.0;
sync = gFalse;
repeat = gFalse;
mix = gFalse;
sound = NULL;
if (soundObj->isDict())
{
Object tmp;
// volume
soundObj->dictLookup("Volume", &tmp);
if (tmp.isNum()) {
volume = tmp.getNum();
}
tmp.free();
// sync
soundObj->dictLookup("Synchronous", &tmp);
if (tmp.isBool()) {
sync = tmp.getBool();
}
tmp.free();
// repeat
soundObj->dictLookup("Repeat", &tmp);
if (tmp.isBool()) {
repeat = tmp.getBool();
}
tmp.free();
// mix
soundObj->dictLookup("Mix", &tmp);
if (tmp.isBool()) {
mix = tmp.getBool();
}
tmp.free();
// 'Sound' object
soundObj->dictLookup("Sound", &tmp);
sound = Sound::parseSound(&tmp);
tmp.free();
}
}
LinkSound::~LinkSound() {
delete sound;
}
//------------------------------------------------------------------------
// LinkRendition
//------------------------------------------------------------------------
LinkRendition::LinkRendition(Object *obj) {
operation = -1;
media = NULL;
js = NULL;
if (obj->isDict()) {
Object tmp;
if (!obj->dictLookup("JS", &tmp)->isNull()) {
if (tmp.isString()) {
js = new GooString(tmp.getString());
} else if (tmp.isStream()) {
Stream *stream = tmp.getStream();
js = new GooString();
stream->fillGooString(js);
} else {
error(-1, "Invalid Rendition Action: JS not string or stream");
}
}
tmp.free();
if (obj->dictLookup("OP", &tmp)->isInt()) {
operation = tmp.getInt();
if (!js && (operation < 0 || operation > 4)) {
error (-1, "Invalid Rendition Action: unrecognized operation valued: %d", operation);
} else {
Object obj1;
// retrieve rendition object
if (obj->dictLookup("R", &renditionObj)->isDict()) {
media = new MediaRendition(&renditionObj);
} else if (operation == 0 || operation == 4) {
error (-1, "Invalid Rendition Action: no R field with op = %d", operation);
renditionObj.free();
}
if (!obj->dictLookupNF("AN", &screenRef)->isRef() && operation >= 0 && operation <= 4) {
error (-1, "Invalid Rendition Action: no AN field with op = %d", operation);
screenRef.free();
}
}
} else if (!js) {
error(-1, "Invalid Rendition action: no OP or JS field defined");
}
tmp.free();
}
}
LinkRendition::~LinkRendition() {
renditionObj.free();
screenRef.free();
if (js)
delete js;
if (media)
delete media;
}
//------------------------------------------------------------------------
// LinkJavaScript
//------------------------------------------------------------------------
LinkJavaScript::LinkJavaScript(Object *jsObj) {
js = NULL;
if (jsObj->isString()) {
js = new GooString(jsObj->getString());
}
else if (jsObj->isStream()) {
Stream *stream = jsObj->getStream();
js = new GooString();
stream->fillGooString(js);
}
}
LinkJavaScript::~LinkJavaScript() {
if (js) {
delete js;
}
}
//------------------------------------------------------------------------
// LinkOCGState
//------------------------------------------------------------------------
LinkOCGState::LinkOCGState(Object *obj) {
Object obj1;
stateList = new GooList();
preserveRB = gTrue;
if (obj->dictLookup("State", &obj1)->isArray()) {
StateList *stList = NULL;
for (int i = 0; i < obj1.arrayGetLength(); ++i) {
Object obj2;
obj1.arrayGetNF(i, &obj2);
if (obj2.isName()) {
if (stList)
stateList->append(stList);
char *name = obj2.getName();
stList = new StateList();
stList->list = new GooList();
if (!strcmp (name, "ON")) {
stList->st = On;
} else if (!strcmp (name, "OFF")) {
stList->st = Off;
} else if (!strcmp (name, "Toggle")) {
stList->st = Toggle;
} else {
error (-1, "Invalid name '%s' in OCG Action state array", name);
delete stList;
stList = NULL;
}
} else if (obj2.isRef()) {
if (stList) {
Ref ocgRef = obj2.getRef();
Ref *item = new Ref();
item->num = ocgRef.num;
item->gen = ocgRef.gen;
stList->list->append(item);
} else {
error (-1, "Invalid OCG Action State array, expected name instead of ref");
}
} else {
error (-1, "Invalid item in OCG Action State array");
}
obj2.free();
}
// Add the last group
if (stList)
stateList->append(stList);
} else {
error (-1, "Invalid OCGState action");
delete stateList;
stateList = NULL;
}
obj1.free();
if (obj->dictLookup("PreserveRB", &obj1)->isBool()) {
preserveRB = obj1.getBool();
}
obj1.free();
}
LinkOCGState::~LinkOCGState() {
if (stateList)
deleteGooList(stateList, StateList);
}
LinkOCGState::StateList::~StateList() {
if (list)
deleteGooList(list, Ref);
}
//------------------------------------------------------------------------
// LinkUnknown
//------------------------------------------------------------------------
LinkUnknown::LinkUnknown(char *actionA) {
action = new GooString(actionA);
}
LinkUnknown::~LinkUnknown() {
delete action;
}
//------------------------------------------------------------------------
// Link
//------------------------------------------------------------------------
Link::Link(Dict *dict, GooString *baseURI) {
Object obj1, obj2;
double t;
action = NULL;
ok = gFalse;
// get rectangle
if (!dict->lookup("Rect", &obj1)->isArray()) {
error(-1, "Annotation rectangle is wrong type");
goto err2;
}
if (!obj1.arrayGet(0, &obj2)->isNum()) {
error(-1, "Bad annotation rectangle");
goto err1;
}
x1 = obj2.getNum();
obj2.free();
if (!obj1.arrayGet(1, &obj2)->isNum()) {
error(-1, "Bad annotation rectangle");
goto err1;
}
y1 = obj2.getNum();
obj2.free();
if (!obj1.arrayGet(2, &obj2)->isNum()) {
error(-1, "Bad annotation rectangle");
goto err1;
}
x2 = obj2.getNum();
obj2.free();
if (!obj1.arrayGet(3, &obj2)->isNum()) {
error(-1, "Bad annotation rectangle");
goto err1;
}
y2 = obj2.getNum();
obj2.free();
obj1.free();
if (x1 > x2) {
t = x1;
x1 = x2;
x2 = t;
}
if (y1 > y2) {
t = y1;
y1 = y2;
y2 = t;
}
// look for destination
if (!dict->lookup("Dest", &obj1)->isNull()) {
action = LinkAction::parseDest(&obj1);
// look for action
} else {
obj1.free();
if (dict->lookup("A", &obj1)->isDict()) {
action = LinkAction::parseAction(&obj1, baseURI);
}
}
obj1.free();
// check for bad action
if (action) {
ok = gTrue;
}
return;
err1:
obj2.free();
err2:
obj1.free();
}
Link::~Link() {
if (action) {
delete action;
}
}
//------------------------------------------------------------------------
// Links
//------------------------------------------------------------------------
Links::Links(Object *annots, GooString *baseURI) {
Link *link;
Object obj1, obj2;
int size;
int i;
links = NULL;
size = 0;
numLinks = 0;
if (annots->isArray()) {
for (i = 0; i < annots->arrayGetLength(); ++i) {
if (annots->arrayGet(i, &obj1)->isDict()) {
if (obj1.dictLookup("Subtype", &obj2)->isName("Link")) {
link = new Link(obj1.getDict(), baseURI);
if (link->isOk()) {
if (numLinks >= size) {
size += 16;
links = (Link **)greallocn(links, size, sizeof(Link *));
}
links[numLinks++] = link;
} else {
delete link;
}
}
obj2.free();
}
obj1.free();
}
}
}
Links::~Links() {
int i;
for (i = 0; i < numLinks; ++i)
delete links[i];
gfree(links);
}
LinkAction *Links::find(double x, double y) const {
int i;
for (i = numLinks - 1; i >= 0; --i) {
if (links[i]->inRect(x, y)) {
return links[i]->getAction();
}
}
return NULL;
}
GBool Links::onLink(double x, double y) const {
int i;
for (i = 0; i < numLinks; ++i) {
if (links[i]->inRect(x, y))
return gTrue;
}
return gFalse;
}
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