Initial revision

1 files changed, 581 insertions, 0 deletions

diff --git a/pdf/xpdf/Link.cc b/pdf/xpdf/Link.cc
new file mode 100644
index 0000000..02b355c
--- /dev/null
+++ b/pdf/xpdf/Link.cc
@@ -0,0 +1,581 @@
+//========================================================================
+//
+// Link.cc
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifdef __GNUC__
+#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"
+
+//------------------------------------------------------------------------
+
+static GString *getFileSpecName(Object *fileSpecObj);
+
+//------------------------------------------------------------------------
+// LinkDest
+//------------------------------------------------------------------------
+
+LinkDest::LinkDest(Array *a, GBool pageIsRef1) {
+  Object obj1, obj2;
+
+  // initialize fields
+  pageIsRef = pageIsRef1;
+  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) {
+  uri = NULL;
+  if (uriObj->isString())
+    uri = uriObj->getString()->copy();
+  else
+    error(-1, "Illegal URI-type link");
+}
+
+LinkURI::~LinkURI() {
+  if (uri)
+    delete uri;
+}
+
+//------------------------------------------------------------------------
+// LinkUnknown
+//------------------------------------------------------------------------
+
+LinkUnknown::LinkUnknown(char *action1) {
+  action = new GString(action1);
+}
+
+LinkUnknown::~LinkUnknown() {
+  delete action;
+}
+
+//------------------------------------------------------------------------
+// Link
+//------------------------------------------------------------------------
+
+Link::Link(Dict *dict) {
+  Object obj1, obj2, obj3, obj4;
+  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;
+  }
+
+  // get border
+  borderW = 0;
+  if (!dict->lookup("Border", &obj1)->isNull()) {
+    if (obj1.isArray() && 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);
+	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) {
+  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());
+	  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(double x, double y) {
+  int i;
+
+  for (i = 0; i < numLinks; ++i) {
+    if (links[i]->inRect(x, y)) {
+      if (links[i]->getAction())
+	return links[i]->getAction();
+      return NULL;
+    }
+  }
+  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;
+}
+
+//------------------------------------------------------------------------
+
+// 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");
+
+  // error
+  } else {
+    error(-1, "Illegal file spec in link");
+  }
+
+  return name;
+}