Diffstat (limited to 'noncore/unsupported/qpdf/xpdf/Link.cc') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/unsupported/qpdf/xpdf/Link.cc | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/Link.cc b/noncore/unsupported/qpdf/xpdf/Link.cc new file mode 100644 index 0000000..79a5f6e --- a/dev/null +++ b/noncore/unsupported/qpdf/xpdf/Link.cc @@ -0,0 +1,634 @@ +//======================================================================== +// +// Link.cc +// +// Copyright 1996 Derek B. Noonburg +// +//======================================================================== + +#ifdef __GNUC__ +#pragma implementation +#endif + +#include <aconf.h> +#include <stddef.h> +#include <string.h> +#include "gmem.h" +#include "GString.h" +#include "Error.h" +#include "Object.h" +#include "Array.h" +#include "Dict.h" +#include "Link.h" + +//------------------------------------------------------------------------ + +static GString *getFileSpecName(Object *fileSpecObj); + +//------------------------------------------------------------------------ +// LinkDest +//------------------------------------------------------------------------ + +LinkDest::LinkDest(Array *a, GBool pageIsRefA) { + Object obj1, obj2; + + // initialize fields + pageIsRef = pageIsRefA; + left = bottom = right = top = zoom = 0; + ok = gFalse; + + // get page + if (pageIsRef) { + if (!a->getNF(0, &obj1)->isRef()) { + error(-1, "Bad annotation destination"); + goto err2; + } + pageRef.num = obj1.getRefNum(); + pageRef.gen = obj1.getRefGen(); + obj1.free(); + } else { + if (!a->get(0, &obj1)->isInt()) { + error(-1, "Bad annotation destination"); + goto err2; + } + pageNum = obj1.getInt() + 1; + obj1.free(); + } + + // get destination type + a->get(1, &obj1); + + // XYZ link + if (obj1.isName("XYZ")) { + kind = destXYZ; + 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(); + 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(); + 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")) { + kind = destFit; + + // FitH link + } else if (obj1.isName("FitH")) { + kind = destFitH; + if (!a->get(2, &obj2)->isNum()) { + error(-1, "Bad annotation destination position"); + goto err1; + } + top = obj2.getNum(); + obj2.free(); + + // FitV link + } else if (obj1.isName("FitV")) { + kind = destFitV; + if (!a->get(2, &obj2)->isNum()) { + error(-1, "Bad annotation destination position"); + goto err1; + } + left = obj2.getNum(); + obj2.free(); + + // FitR link + } else if (obj1.isName("FitR")) { + kind = destFitR; + if (!a->get(2, &obj2)->isNum()) { + error(-1, "Bad annotation destination position"); + goto err1; + } + left = obj2.getNum(); + obj2.free(); + if (!a->get(3, &obj2)->isNum()) { + error(-1, "Bad annotation destination position"); + goto err1; + } + bottom = obj2.getNum(); + obj2.free(); + if (!a->get(4, &obj2)->isNum()) { + error(-1, "Bad annotation destination position"); + goto err1; + } + right = obj2.getNum(); + obj2.free(); + if (!a->get(5, &obj2)->isNum()) { + error(-1, "Bad annotation destination position"); + goto err1; + } + top = obj2.getNum(); + obj2.free(); + + // FitB link + } else if (obj1.isName("FitB")) { + kind = destFitB; + + // FitBH link + } else if (obj1.isName("FitBH")) { + kind = destFitBH; + if (!a->get(2, &obj2)->isNum()) { + error(-1, "Bad annotation destination position"); + goto err1; + } + top = obj2.getNum(); + obj2.free(); + + // FitBV link + } else if (obj1.isName("FitBV")) { + kind = destFitBV; + if (!a->get(2, &obj2)->isNum()) { + error(-1, "Bad annotation destination position"); + goto err1; + } + left = obj2.getNum(); + 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 GString(destObj->getName()); + } else if (destObj->isString()) { + namedDest = destObj->getString()->copy(); + + // destination dictionary + } else if (destObj->isArray()) { + dest = new LinkDest(destObj->getArray(), gTrue); + 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) { + dest = NULL; + namedDest = NULL; + + // get file name + fileName = getFileSpecName(fileSpecObj); + + // named destination + if (destObj->isName()) { + namedDest = new GString(destObj->getName()); + } else if (destObj->isString()) { + namedDest = destObj->getString()->copy(); + + // destination dictionary + } else if (destObj->isArray()) { + dest = new LinkDest(destObj->getArray(), gFalse); + 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; + + fileName = NULL; + params = NULL; + + if (actionObj->isDict()) { + if (!actionObj->dictLookup("F", &obj1)->isNull()) { + fileName = getFileSpecName(&obj1); + } else { + obj1.free(); + //~ 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); + fileName = getFileSpecName(&obj2); + obj2.free(); + if (obj1.dictLookup("P", &obj2)->isString()) + params = obj2.getString()->copy(); + obj2.free(); + } else { + error(-1, "Bad launch-type link action"); + } + } + obj1.free(); + } +} + +LinkLaunch::~LinkLaunch() { + if (fileName) + delete fileName; + if (params) + delete params; +} + +//------------------------------------------------------------------------ +// LinkURI +//------------------------------------------------------------------------ + +LinkURI::LinkURI(Object *uriObj, GString *baseURI) { + GString *uri2; + int n; + char c; + + uri = NULL; + if (uriObj->isString()) { + uri2 = uriObj->getString()->copy(); + if (baseURI) { + 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 GString(nameObj->getName()); + } +} + +LinkNamed::~LinkNamed() { + if (name) { + delete name; + } +} + +//------------------------------------------------------------------------ +// LinkUnknown +//------------------------------------------------------------------------ + +LinkUnknown::LinkUnknown(char *actionA) { + action = new GString(actionA); +} + +LinkUnknown::~LinkUnknown() { + delete action; +} + +//------------------------------------------------------------------------ +// Link +//------------------------------------------------------------------------ + +Link::Link(Dict *dict, GString *baseURI) { + Object obj1, obj2, obj3, obj4; + fouble 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; + } + + // get border + borderW = 0; + if (!dict->lookup("Border", &obj1)->isNull()) { + if (obj1.isArray() && obj1.arrayGetLength() >= 3) { + if (obj1.arrayGet(2, &obj2)->isNum()) { + borderW = obj2.getNum(); + } else { + error(-1, "Bad annotation border"); + } + obj2.free(); + } + } + obj1.free(); + + // look for destination + if (!dict->lookup("Dest", &obj1)->isNull()) { + action = new LinkGoTo(&obj1); + + // look for action + } else { + obj1.free(); + if (dict->lookup("A", &obj1)->isDict()) { + obj1.dictLookup("S", &obj2); + + // GoTo action + if (obj2.isName("GoTo")) { + obj1.dictLookup("D", &obj3); + action = new LinkGoTo(&obj3); + obj3.free(); + + // GoToR action + } else if (obj2.isName("GoToR")) { + obj1.dictLookup("F", &obj3); + obj1.dictLookup("D", &obj4); + action = new LinkGoToR(&obj3, &obj4); + obj3.free(); + obj4.free(); + + // Launch action + } else if (obj2.isName("Launch")) { + action = new LinkLaunch(&obj1); + + // URI action + } else if (obj2.isName("URI")) { + obj1.dictLookup("URI", &obj3); + action = new LinkURI(&obj3, baseURI); + obj3.free(); + + // Named action + } else if (obj2.isName("Named")) { + obj1.dictLookup("N", &obj3); + action = new LinkNamed(&obj3); + obj3.free(); + + // unknown action + } else if (obj2.isName()) { + action = new LinkUnknown(obj2.getName()); + + // action is missing or wrong type + } else { + error(-1, "Bad annotation action"); + action = NULL; + } + + obj2.free(); + + } else { + error(-1, "Missing annotation destination/action"); + action = NULL; + } + } + obj1.free(); + + // check for bad action + if (action && action->isOk()) + ok = gTrue; + + return; + + err1: + obj2.free(); + err2: + obj1.free(); +} + +Link::~Link() { + if (action) + delete action; +} + +//------------------------------------------------------------------------ +// Links +//------------------------------------------------------------------------ + +Links::Links(Object *annots, GString *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 **)grealloc(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(fouble x, fouble y) { + int i; + + for (i = 0; i < numLinks; ++i) { + if (links[i]->inRect(x, y)) { + return links[i]->getAction(); + } + } + return NULL; +} + +GBool Links::onLink(fouble x, fouble y) { + int i; + + for (i = 0; i < numLinks; ++i) { + if (links[i]->inRect(x, y)) + return gTrue; + } + return gFalse; +} + +//------------------------------------------------------------------------ + +// Extract a file name from a file specification (string or dictionary). +static GString *getFileSpecName(Object *fileSpecObj) { + GString *name; + Object obj1; + + name = NULL; + + // string + if (fileSpecObj->isString()) { + name = fileSpecObj->getString()->copy(); + + // dictionary + } else if (fileSpecObj->isDict()) { + if (!fileSpecObj->dictLookup("Unix", &obj1)->isString()) { + obj1.free(); + fileSpecObj->dictLookup("F", &obj1); + } + if (obj1.isString()) + name = obj1.getString()->copy(); + else + error(-1, "Illegal file spec in link"); + obj1.free(); + + // error + } else { + error(-1, "Illegal file spec in link"); + } + + return name; +} |