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-rw-r--r--kpdf/xpdf/xpdf/Link.cc784
1 files changed, 784 insertions, 0 deletions
diff --git a/kpdf/xpdf/xpdf/Link.cc b/kpdf/xpdf/xpdf/Link.cc
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--- /dev/null
+++ b/kpdf/xpdf/xpdf/Link.cc
@@ -0,0 +1,784 @@
+//========================================================================
+//
+// Link.cc
+//
+// Copyright 1996-2003 Glyph & Cog, LLC
+//
+//========================================================================
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#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"
+
+//------------------------------------------------------------------------
+// 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, GString *baseURI) {
+ LinkAction *action;
+ Object obj2, obj3, obj4;
+
+ if (!obj->isDict()) {
+ error(-1, "Bad annotation action");
+ 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")) {
+ obj->dictLookupNF("Annot", &obj3);
+ obj->dictLookup("T", &obj4);
+ action = new LinkMovie(&obj3, &obj4);
+ obj3.free();
+ obj4.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();
+
+ if (action && !action->isOk()) {
+ delete action;
+ return NULL;
+ }
+ return action;
+}
+
+GString *LinkAction::getFileSpecName(Object *fileSpecObj) {
+ GString *name;
+ Object obj1;
+
+ name = NULL;
+
+ // string
+ if (fileSpecObj->isString()) {
+ name = fileSpecObj->getString()->copy();
+
+ // dictionary
+ } else if (fileSpecObj->isDict()) {
+#ifdef WIN32
+ if (!fileSpecObj->dictLookup("DOS", &obj1)->isString()) {
+#else
+ if (!fileSpecObj->dictLookup("Unix", &obj1)->isString()) {
+#endif
+ 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");
+ }
+
+ // system-dependent path manipulation
+ if (name) {
+#ifdef WIN32
+ int i, j;
+
+ // "//...." --> "\...."
+ // "/x/...." --> "x:\...."
+ // "/server/share/...." --> "\\server\share\...."
+ // convert escaped slashes to slashes and unescaped slashes to backslashes
+ i = 0;
+ if (name->getChar(0) == '/') {
+ if (name->getLength() >= 2 && name->getChar(1) == '/') {
+ name->del(0);
+ i = 0;
+ } else if (name->getLength() >= 2 &&
+ ((name->getChar(1) >= 'a' && name->getChar(1) <= 'z') ||
+ (name->getChar(1) >= 'A' && name->getChar(1) <= 'Z')) &&
+ (name->getLength() == 2 || name->getChar(2) == '/')) {
+ name->setChar(0, name->getChar(1));
+ name->setChar(1, ':');
+ i = 2;
+ } else {
+ for (j = 2; j < name->getLength(); ++j) {
+ if (name->getChar(j-1) != '\\' &&
+ name->getChar(j) == '/') {
+ break;
+ }
+ }
+ if (j < name->getLength()) {
+ name->setChar(0, '\\');
+ name->insert(0, '\\');
+ i = 2;
+ }
+ }
+ }
+ for (; i < name->getLength(); ++i) {
+ if (name->getChar(i) == '/') {
+ name->setChar(i, '\\');
+ } else if (name->getChar(i) == '\\' &&
+ i+1 < name->getLength() &&
+ name->getChar(i+1) == '/') {
+ name->del(i);
+ }
+ }
+#else
+ // no manipulation needed for Unix
+#endif
+ }
+
+ return name;
+}
+
+//------------------------------------------------------------------------
+// LinkDest
+//------------------------------------------------------------------------
+
+LinkDest::LinkDest(Array *a) {
+ Object obj1, obj2;
+
+ // initialize fields
+ left = bottom = right = top = zoom = 0;
+ 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;
+ if (!a->get(2, &obj2)->isNum()) {
+ error(-1, "Bad annotation destination position");
+ kind = destFit;
+ }
+ top = obj2.getNum();
+ 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;
+ if (!a->get(2, &obj2)->isNum()) {
+ error(-1, "Bad annotation destination position");
+ kind = destFit;
+ }
+ left = obj2.getNum();
+ 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;
+ if (!a->get(2, &obj2)->isNum()) {
+ error(-1, "Bad annotation destination position");
+ kind = destFit;
+ }
+ top = obj2.getNum();
+ 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;
+ if (!a->get(2, &obj2)->isNum()) {
+ error(-1, "Bad annotation destination position");
+ kind = destFit;
+ }
+ 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());
+ 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());
+ 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();
+#ifdef WIN32
+ if (actionObj->dictLookup("Win", &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");
+ }
+#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);
+ 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");
+ }
+#endif
+ }
+ 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 && 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 GString(nameObj->getName());
+ }
+}
+
+LinkNamed::~LinkNamed() {
+ if (name) {
+ delete name;
+ }
+}
+
+//------------------------------------------------------------------------
+// LinkMovie
+//------------------------------------------------------------------------
+
+LinkMovie::LinkMovie(Object *annotObj, Object *titleObj) {
+ annotRef.num = -1;
+ title = NULL;
+ if (annotObj->isRef()) {
+ annotRef = annotObj->getRef();
+ } else if (titleObj->isString()) {
+ title = titleObj->getString()->copy();
+ } else {
+ error(-1, "Movie action is missing both the Annot and T keys");
+ }
+}
+
+LinkMovie::~LinkMovie() {
+ if (title) {
+ delete title;
+ }
+}
+
+//------------------------------------------------------------------------
+// LinkUnknown
+//------------------------------------------------------------------------
+
+LinkUnknown::LinkUnknown(char *actionA) {
+ action = new GString(actionA);
+}
+
+LinkUnknown::~LinkUnknown() {
+ delete action;
+}
+
+//------------------------------------------------------------------------
+// Link
+//------------------------------------------------------------------------
+
+Link::Link(Dict *dict, GString *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, 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 **)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) {
+ 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) {
+ int i;
+
+ for (i = 0; i < numLinks; ++i) {
+ if (links[i]->inRect(x, y))
+ return gTrue;
+ }
+ return gFalse;
+}