Use std::unique_ptr for LinkGoto data members

This makes it clear that these pointers are owning.
It makes the code slightly shorter, too.

2 files changed, 26 insertions, 71 deletions

diff --git a/poppler/Link.cc b/poppler/Link.cc
index 0bf57b3e..c9945ce8 100644
--- a/poppler/Link.cc
+++ b/poppler/Link.cc
@@ -425,21 +425,17 @@ LinkDest::LinkDest(const LinkDest *dest) {
 //------------------------------------------------------------------------
 
 LinkGoTo::LinkGoTo(const Object *destObj) {
-  dest = nullptr;
-  namedDest = nullptr;
-
   // named destination
   if (destObj->isName()) {
-    namedDest = new GooString(destObj->getName());
+    namedDest = std::make_unique<GooString>(destObj->getName());
   } else if (destObj->isString()) {
-    namedDest = destObj->getString()->copy();
+    namedDest = std::unique_ptr<GooString>(destObj->getString()->copy());
 
   // destination dictionary
   } else if (destObj->isArray()) {
-    dest = new LinkDest(destObj->getArray());
+    dest = std::make_unique<LinkDest>(destObj->getArray());
     if (!dest->isOk()) {
-      delete dest;
-      dest = nullptr;
+      dest.reset();
     }
 
   // error
@@ -448,40 +444,28 @@ LinkGoTo::LinkGoTo(const Object *destObj) {
   }
 }
 
-LinkGoTo::~LinkGoTo() {
-  if (dest)
-    delete dest;
-  if (namedDest)
-    delete namedDest;
-}
-
 //------------------------------------------------------------------------
 // LinkGoToR
 //------------------------------------------------------------------------
 
 LinkGoToR::LinkGoToR(Object *fileSpecObj, Object *destObj) {
-  fileName = nullptr;
-  dest = nullptr;
-  namedDest = nullptr;
-
   // get file name
   Object obj1 = getFileSpecNameForPlatform (fileSpecObj);
   if (obj1.isString()) {
-    fileName = obj1.getString()->copy();
+    fileName = std::unique_ptr<GooString>(obj1.getString()->copy());
   }
 
   // named destination
   if (destObj->isName()) {
-    namedDest = new GooString(destObj->getName());
+    namedDest = std::make_unique<GooString>(destObj->getName());
   } else if (destObj->isString()) {
-    namedDest = destObj->getString()->copy();
+    namedDest = std::unique_ptr<GooString>(destObj->getString()->copy());
 
   // destination dictionary
   } else if (destObj->isArray()) {
-    dest = new LinkDest(destObj->getArray());
+    dest = std::make_unique<LinkDest>(destObj->getArray());
     if (!dest->isOk()) {
-      delete dest;
-      dest = nullptr;
+      dest.reset();
     }
 
   // error
@@ -490,31 +474,18 @@ LinkGoToR::LinkGoToR(Object *fileSpecObj, Object *destObj) {
   }
 }
 
-LinkGoToR::~LinkGoToR() {
-  if (fileName)
-    delete fileName;
-  if (dest)
-    delete dest;
-  if (namedDest)
-    delete namedDest;
-}
-
-
 //------------------------------------------------------------------------
 // LinkLaunch
 //------------------------------------------------------------------------
 
 LinkLaunch::LinkLaunch(const Object *actionObj) {
 
-  fileName = nullptr;
-  params = nullptr;
-
   if (actionObj->isDict()) {
     Object obj1 = actionObj->dictLookup("F");
     if (!obj1.isNull()) {
       Object obj3 = getFileSpecNameForPlatform (&obj1);
       if (obj3.isString()) {
-	fileName = obj3.getString()->copy();
+	fileName = std::unique_ptr<GooString>(obj3.getString()->copy());
       }
     } else {
 #ifdef _WIN32
@@ -528,11 +499,11 @@ LinkLaunch::LinkLaunch(const Object *actionObj) {
 	Object obj2 = obj1.dictLookup("F");
 	Object obj3 = getFileSpecNameForPlatform (&obj2);
 	if (obj3.isString()) {
-	  fileName = obj3.getString()->copy();
+	  fileName = std::unique_ptr<GooString>(obj3.getString()->copy());
 	}
 	obj2 = obj1.dictLookup("P");
 	if (obj2.isString()) {
-	  params = obj2.getString()->copy();
+	  params = std::unique_ptr<GooString>(obj2.getString()->copy());
 	}
       } else {
 	error(errSyntaxWarning, -1, "Bad launch-type link action");
@@ -541,13 +512,6 @@ LinkLaunch::LinkLaunch(const Object *actionObj) {
   }
 }
 
-LinkLaunch::~LinkLaunch() {
-  if (fileName)
-    delete fileName;
-  if (params)
-    delete params;
-}
-
 //------------------------------------------------------------------------
 // LinkURI
 //------------------------------------------------------------------------
diff --git a/poppler/Link.h b/poppler/Link.h
index b996f560..3aa5e0a8 100644
--- a/poppler/Link.h
+++ b/poppler/Link.h
@@ -164,22 +164,19 @@ public:
   // Build a LinkGoTo from a destination (dictionary, name, or string).
   LinkGoTo(const Object *destObj);
 
-  // Destructor.
-  ~LinkGoTo() override;
-
   // Was the LinkGoTo created successfully?
   bool isOk() const override { return dest || namedDest; }
 
   // Accessors.
   LinkActionKind getKind() const override { return actionGoTo; }
-  const LinkDest *getDest() const { return dest; }
-  const GooString *getNamedDest() const { return namedDest; }
+  const LinkDest *getDest() const { return dest.get(); }
+  const GooString *getNamedDest() const { return namedDest.get(); }
 
 private:
 
-  LinkDest *dest;		// regular destination (nullptr for remote
+  std::unique_ptr<LinkDest> dest;		// regular destination (nullptr for remote
 				//   link with bad destination)
-  GooString *namedDest;	// named destination (only one of dest and
+  std::unique_ptr<GooString> namedDest;	// named destination (only one of dest and
 				//   and namedDest may be non-nullptr)
 };
 
@@ -194,24 +191,21 @@ public:
   // (dictionary, name, or string).
   LinkGoToR(Object *fileSpecObj, Object *destObj);
 
-  // Destructor.
-  ~LinkGoToR() override;
-
   // Was the LinkGoToR created successfully?
   bool isOk() const override { return fileName && (dest || namedDest); }
 
   // Accessors.
   LinkActionKind getKind() const override { return actionGoToR; }
-  const GooString *getFileName() const { return fileName; }
-  const LinkDest *getDest() const { return dest; }
-  const GooString *getNamedDest() const { return namedDest; }
+  const GooString *getFileName() const { return fileName.get(); }
+  const LinkDest *getDest() const { return dest.get(); }
+  const GooString *getNamedDest() const { return namedDest.get(); }
 
 private:
 
-  GooString *fileName;		// file name
-  LinkDest *dest;		// regular destination (nullptr for remote
+  std::unique_ptr<GooString> fileName;		// file name
+  std::unique_ptr<LinkDest> dest;		// regular destination (nullptr for remote
 				//   link with bad destination)
-  GooString *namedDest;	// named destination (only one of dest and
+  std::unique_ptr<GooString> namedDest;	// named destination (only one of dest and
 				//   and namedDest may be non-nullptr)
 };
 
@@ -225,21 +219,18 @@ public:
   // Build a LinkLaunch from an action dictionary.
   LinkLaunch(const Object *actionObj);
 
-  // Destructor.
-  ~LinkLaunch() override;
-
   // Was the LinkLaunch created successfully?
   bool isOk() const override { return fileName != nullptr; }
 
   // Accessors.
   LinkActionKind getKind() const override { return actionLaunch; }
-  const GooString *getFileName() const { return fileName; }
-  const GooString *getParams() const { return params; }
+  const GooString *getFileName() const { return fileName.get(); }
+  const GooString *getParams() const { return params.get(); }
 
 private:
 
-  GooString *fileName;		// file name
-  GooString *params;		// parameters
+  std::unique_ptr<GooString> fileName;		// file name
+  std::unique_ptr<GooString> params;		// parameters
 };
 
 //------------------------------------------------------------------------