From 7455f1a259ce28ee56866b5cde06e79be4cfaf97 Mon Sep 17 00:00:00 2001
From: Martin Owens <doctormo@gmail.com>
Date: Sun, 26 Jan 2014 12:19:47 -0500
Subject: Check file existance and clean up memory issues thanks to KK and
 Johan

(bzr r12979)
---
 src/document.cpp       | 10 +++++-----
 src/document.h         |  2 +-
 src/uri-references.cpp |  4 +++-
 src/uri.cpp            | 17 ++++++++++++++---
 4 files changed, 23 insertions(+), 10 deletions(-)

(limited to 'src')

diff --git a/src/document.cpp b/src/document.cpp
index e456f2b81..634462001 100644
--- a/src/document.cpp
+++ b/src/document.cpp
@@ -478,22 +478,22 @@ SPDocument *SPDocument::createDoc(Inkscape::XML::Document *rdoc,
 /**
  * Fetches a document and attaches it to the current document as a child href
  */
-SPDocument *SPDocument::createChildDoc(std::string const uri)
+SPDocument *SPDocument::createChildDoc(std::string const &uri)
 {
     SPDocument *parent = this;
     SPDocument *document = NULL;
 
     while(parent != NULL && document == NULL) {
         // Check myself and any parents int he chain
-        if(uri.compare(parent->getURI())==0) {
+        if(uri == parent->getURI()) {
             document = parent;
             break;
         }
         // Then check children of those.
         boost::ptr_list<SPDocument>::iterator iter;
         for (iter = parent->_child_documents.begin();
-            iter != parent->_child_documents.end(); ++iter) {
-            if(uri.compare(iter->getURI())==0) {
+          iter != parent->_child_documents.end(); ++iter) {
+            if(uri == iter->getURI()) {
                 document = &*iter;
                 break;
             }
@@ -503,7 +503,7 @@ SPDocument *SPDocument::createChildDoc(std::string const uri)
 
     // Load a fresh document from the svg source.
     if(!document) {
-        const char *path = g_strdup(uri.c_str());
+        const char *path = uri.c_str();
         document = createNewDoc(path, false, false, this);
     }
     return document;
diff --git a/src/document.h b/src/document.h
index 110db11c6..e5567d3b6 100644
--- a/src/document.h
+++ b/src/document.h
@@ -225,7 +225,7 @@ public:
     static SPDocument *createNewDoc(const gchar *uri, unsigned int keepalive,
             bool make_new = false, SPDocument *parent=NULL );
     static SPDocument *createNewDocFromMem(const gchar *buffer, gint length, unsigned int keepalive);
-           SPDocument *createChildDoc(std::string const uri);
+           SPDocument *createChildDoc(std::string const &uri);
 
     /**
      * Returns the bottommost item from the list which is at the point, or NULL if none.
diff --git a/src/uri-references.cpp b/src/uri-references.cpp
index dc0101024..abe16ec9d 100644
--- a/src/uri-references.cpp
+++ b/src/uri-references.cpp
@@ -58,10 +58,12 @@ void URIReference::attach(const URI &uri) throw(BadURIException)
 
     // The path contains references to seperate document files to load.
     if(document && uri.getPath()) {
-        std::string base = std::string(g_strdup(document->getBase()));
+        std::string base = std::string(document->getBase());
         std::string path = uri.getFullPath(base);
         if(!path.empty())
             document = document->createChildDoc(path);
+        else
+            document = NULL;
     }
     if(!document) {
         g_warning("Can't get document for referenced URI: %s", uri.toString());
diff --git a/src/uri.cpp b/src/uri.cpp
index 8d0e49139..89f6f33e4 100644
--- a/src/uri.cpp
+++ b/src/uri.cpp
@@ -135,14 +135,25 @@ gchar *URI::to_native_filename(gchar const* uri) throw(BadURIException)
     filename = tmp.toNativeFilename();
     return filename;
 }
-
+/*
+ * Returns the absolute path to an existing file referenced in this URI,
+ * if the uri is data, the path is empty or the file doesn't exist, then
+ * an empty string is returned.
+ *
+ * Does not check if the returned path is the local document's path (local)
+ * and thus redundent. Caller is expected to check against the document's path.
+ */
 const std::string URI::getFullPath(std::string const base) const {
     std::string path = std::string(_impl->getPath());
     // Calculate the absolute path from an available base
-    if(!path.empty() && !base.empty() && path.compare(0, 1, "/") != 0) {
+    if(!base.empty() && !path.empty() && path[0] != '/') {
         path = Glib::build_filename(base, path);
     }
-    // TODO: Check existance of file here
+    // Check the existance of the file
+    if(! g_file_test(path.c_str(), G_FILE_TEST_EXISTS) 
+      || g_file_test(path.c_str(), G_FILE_TEST_IS_DIR) ) {
+        path.clear();
+    }
     return path;
 }
 
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