X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6df6e35a3eae74404f15f8f7c09ce19c29f47b4a..2bdba43f026251eafe1cfe3ad35ee4ca08f9253b:/src/xml/xml.cpp

diff --git a/src/xml/xml.cpp b/src/xml/xml.cpp
index 4c94c15431..4941e6104b 100644
--- a/src/xml/xml.cpp
+++ b/src/xml/xml.cpp
@@ -40,7 +40,7 @@ IMPLEMENT_CLASS(wxXmlDocument, wxObject)
 
 
 // a private utility used by wxXML
-static bool wxIsWhiteOnly(const wxChar *buf);
+static bool wxIsWhiteOnly(const wxString& buf);
 
 
 //-----------------------------------------------------------------------------
@@ -49,10 +49,11 @@ static bool wxIsWhiteOnly(const wxChar *buf);
 
 wxXmlNode::wxXmlNode(wxXmlNode *parent,wxXmlNodeType type,
                      const wxString& name, const wxString& content,
-                     wxXmlProperty *props, wxXmlNode *next)
+                     wxXmlAttribute *attrs, wxXmlNode *next, int lineNo)
     : m_type(type), m_name(name), m_content(content),
-      m_properties(props), m_parent(parent),
-      m_children(NULL), m_next(next)
+      m_attrs(attrs), m_parent(parent),
+      m_children(NULL), m_next(next),
+      m_lineNo(lineNo)
 {
     if (m_parent)
     {
@@ -67,10 +68,12 @@ wxXmlNode::wxXmlNode(wxXmlNode *parent,wxXmlNodeType type,
 }
 
 wxXmlNode::wxXmlNode(wxXmlNodeType type, const wxString& name,
-                     const wxString& content)
+                     const wxString& content,
+                     int lineNo)
     : m_type(type), m_name(name), m_content(content),
-      m_properties(NULL), m_parent(NULL),
-      m_children(NULL), m_next(NULL)
+      m_attrs(NULL), m_parent(NULL),
+      m_children(NULL), m_next(NULL),
+      m_lineNo(lineNo)
 {}
 
 wxXmlNode::wxXmlNode(const wxXmlNode& node)
@@ -89,8 +92,8 @@ wxXmlNode::~wxXmlNode()
         delete c;
     }
 
-    wxXmlProperty *p, *p2;
-    for (p = m_properties; p; p = p2)
+    wxXmlAttribute *p, *p2;
+    for (p = m_attrs; p; p = p2)
     {
         p2 = p->GetNext();
         delete p;
@@ -99,7 +102,7 @@ wxXmlNode::~wxXmlNode()
 
 wxXmlNode& wxXmlNode::operator=(const wxXmlNode& node)
 {
-    wxDELETE(m_properties);
+    wxDELETE(m_attrs);
     wxDELETE(m_children);
     DoCopy(node);
     return *this;
@@ -110,6 +113,7 @@ void wxXmlNode::DoCopy(const wxXmlNode& node)
     m_type = node.m_type;
     m_name = node.m_name;
     m_content = node.m_content;
+    m_lineNo = node.m_lineNo;
     m_children = NULL;
 
     wxXmlNode *n = node.m_children;
@@ -119,49 +123,51 @@ void wxXmlNode::DoCopy(const wxXmlNode& node)
         n = n->GetNext();
     }
 
-    m_properties = NULL;
-    wxXmlProperty *p = node.m_properties;
+    m_attrs = NULL;
+    wxXmlAttribute *p = node.m_attrs;
     while (p)
     {
-       AddProperty(p->GetName(), p->GetValue());
+       AddAttribute(p->GetName(), p->GetValue());
        p = p->GetNext();
     }
 }
 
-bool wxXmlNode::HasProp(const wxString& propName) const
+bool wxXmlNode::HasAttribute(const wxString& attrName) const
 {
-    wxXmlProperty *prop = GetProperties();
+    wxXmlAttribute *attr = GetAttributes();
 
-    while (prop)
+    while (attr)
     {
-        if (prop->GetName() == propName) return true;
-        prop = prop->GetNext();
+        if (attr->GetName() == attrName) return true;
+        attr = attr->GetNext();
     }
 
     return false;
 }
 
-bool wxXmlNode::GetPropVal(const wxString& propName, wxString *value) const
+bool wxXmlNode::GetAttribute(const wxString& attrName, wxString *value) const
 {
-    wxXmlProperty *prop = GetProperties();
+    wxCHECK_MSG( value, false, "value argument must not be NULL" );
 
-    while (prop)
+    wxXmlAttribute *attr = GetAttributes();
+
+    while (attr)
     {
-        if (prop->GetName() == propName)
+        if (attr->GetName() == attrName)
         {
-            *value = prop->GetValue();
+            *value = attr->GetValue();
             return true;
         }
-        prop = prop->GetNext();
+        attr = attr->GetNext();
     }
 
     return false;
 }
 
-wxString wxXmlNode::GetPropVal(const wxString& propName, const wxString& defaultVal) const
+wxString wxXmlNode::GetAttribute(const wxString& attrName, const wxString& defaultVal) const
 {
     wxString tmp;
-    if (GetPropVal(propName, &tmp))
+    if (GetAttribute(attrName, &tmp))
         return tmp;
 
     return defaultVal;
@@ -181,39 +187,69 @@ void wxXmlNode::AddChild(wxXmlNode *child)
     child->m_parent = this;
 }
 
-bool wxXmlNode::InsertChild(wxXmlNode *child, wxXmlNode *before_node)
+// inserts a new node in front of 'followingNode'
+bool wxXmlNode::InsertChild(wxXmlNode *child, wxXmlNode *followingNode)
 {
-    wxCHECK_MSG(before_node == NULL || before_node->GetParent() == this, false,
-                 wxT("wxXmlNode::InsertChild - the node has incorrect parent"));
-    wxCHECK_MSG(child, false, wxT("Cannot insert a NULL pointer!"));
+    wxCHECK_MSG( child, false, "cannot insert a NULL node!" );
+    wxCHECK_MSG( child->m_parent == NULL, false, "node already has a parent" );
+    wxCHECK_MSG( child->m_next == NULL, false, "node already has m_next" );
+    wxCHECK_MSG( followingNode == NULL || followingNode->GetParent() == this,
+                 false,
+                 "wxXmlNode::InsertChild - followingNode has incorrect parent" );
 
-    if (m_children == before_node)
-       m_children = child;
-    else if (m_children == NULL)
-    {
-        if (before_node != NULL)
-            return false;       // we have no children so we don't need to search
-        m_children = child;
-    }
-    else if (before_node == NULL)
+    // this is for backward compatibility, NULL was allowed here thanks to
+    // the confusion about followingNode's meaning
+    if ( followingNode == NULL )
+        followingNode = m_children;
+
+    if ( m_children == followingNode )
     {
-        // prepend child
-        child->m_parent = this;
         child->m_next = m_children;
         m_children = child;
-        return true;
     }
     else
     {
         wxXmlNode *ch = m_children;
-        while (ch && ch->m_next != before_node) ch = ch->m_next;
-        if (!ch)
-            return false;       // before_node not found
+        while ( ch && ch->m_next != followingNode )
+            ch = ch->m_next;
+        if ( !ch )
+        {
+            wxFAIL_MSG( "followingNode has this node as parent, but couldn't be found among children" );
+            return false;
+        }
+
+        child->m_next = followingNode;
         ch->m_next = child;
     }
 
     child->m_parent = this;
-    child->m_next = before_node;
+    return true;
+}
+
+// inserts a new node right after 'precedingNode'
+bool wxXmlNode::InsertChildAfter(wxXmlNode *child, wxXmlNode *precedingNode)
+{
+    wxCHECK_MSG( child, false, "cannot insert a NULL node!" );
+    wxCHECK_MSG( child->m_parent == NULL, false, "node already has a parent" );
+    wxCHECK_MSG( child->m_next == NULL, false, "node already has m_next" );
+    wxCHECK_MSG( precedingNode == NULL || precedingNode->m_parent == this, false,
+                 "precedingNode has wrong parent" );
+
+    if ( precedingNode )
+    {
+        child->m_next = precedingNode->m_next;
+        precedingNode->m_next = child;
+    }
+    else // precedingNode == NULL
+    {
+        wxCHECK_MSG( m_children == NULL, false,
+                     "NULL precedingNode only makes sense when there are no children" );
+
+        child->m_next = m_children;
+        m_children = child;
+    }
+
+    child->m_parent = this;
     return true;
 }
 
@@ -246,50 +282,65 @@ bool wxXmlNode::RemoveChild(wxXmlNode *child)
     }
 }
 
+void wxXmlNode::AddAttribute(const wxString& name, const wxString& value)
+{
+    AddProperty(name, value);
+}
+
+void wxXmlNode::AddAttribute(wxXmlAttribute *attr)
+{
+    AddProperty(attr);
+}
+
+bool wxXmlNode::DeleteAttribute(const wxString& name)
+{
+    return DeleteProperty(name);
+}
+
 void wxXmlNode::AddProperty(const wxString& name, const wxString& value)
 {
-    AddProperty(new wxXmlProperty(name, value, NULL));
+    AddProperty(new wxXmlAttribute(name, value, NULL));
 }
 
-void wxXmlNode::AddProperty(wxXmlProperty *prop)
+void wxXmlNode::AddProperty(wxXmlAttribute *attr)
 {
-    if (m_properties == NULL)
-        m_properties = prop;
+    if (m_attrs == NULL)
+        m_attrs = attr;
     else
     {
-        wxXmlProperty *p = m_properties;
+        wxXmlAttribute *p = m_attrs;
         while (p->GetNext()) p = p->GetNext();
-        p->SetNext(prop);
+        p->SetNext(attr);
     }
 }
 
 bool wxXmlNode::DeleteProperty(const wxString& name)
 {
-    wxXmlProperty *prop;
+    wxXmlAttribute *attr;
 
-    if (m_properties == NULL)
+    if (m_attrs == NULL)
         return false;
 
-    else if (m_properties->GetName() == name)
+    else if (m_attrs->GetName() == name)
     {
-        prop = m_properties;
-        m_properties = prop->GetNext();
-        prop->SetNext(NULL);
-        delete prop;
+        attr = m_attrs;
+        m_attrs = attr->GetNext();
+        attr->SetNext(NULL);
+        delete attr;
         return true;
     }
 
     else
     {
-        wxXmlProperty *p = m_properties;
+        wxXmlAttribute *p = m_attrs;
         while (p->GetNext())
         {
             if (p->GetNext()->GetName() == name)
             {
-                prop = p->GetNext();
-                p->SetNext(prop->GetNext());
-                prop->SetNext(NULL);
-                delete prop;
+                attr = p->GetNext();
+                p->SetNext(attr->GetNext());
+                attr->SetNext(NULL);
+                delete attr;
                 return true;
             }
             p = p->GetNext();
@@ -386,7 +437,11 @@ void wxXmlDocument::DoCopy(const wxXmlDocument& doc)
     m_encoding = doc.m_encoding;
 #endif
     m_fileEncoding = doc.m_fileEncoding;
-    m_root = new wxXmlNode(*doc.m_root);
+
+    if (doc.m_root)
+        m_root = new wxXmlNode(*doc.m_root);
+    else
+        m_root = NULL;
 }
 
 bool wxXmlDocument::Load(const wxString& filename, const wxString& encoding, int flags)
@@ -414,13 +469,9 @@ bool wxXmlDocument::Save(const wxString& filename, int indentstep) const
 // converts Expat-produced string in UTF-8 into wxString using the specified
 // conv or keep in UTF-8 if conv is NULL
 static wxString CharToString(wxMBConv *conv,
-                                    const char *s, size_t len = wxString::npos)
+                             const char *s, size_t len = wxString::npos)
 {
-#if wxUSE_UNICODE
-    wxUnusedVar(conv);
-
-    return wxString(s, wxConvUTF8, len);
-#else // !wxUSE_UNICODE
+#if !wxUSE_UNICODE
     if ( conv )
     {
         // there can be no embedded NULs in this string so we don't need the
@@ -430,66 +481,101 @@ static wxString CharToString(wxMBConv *conv,
 
         return wxString(wbuf, *conv);
     }
-    else // already in UTF-8, no conversion needed
-    {
-        return wxString(s, len != wxString::npos ? len : strlen(s));
-    }
-#endif // wxUSE_UNICODE/!wxUSE_UNICODE
+    // else: the string is wanted in UTF-8
+#endif // !wxUSE_UNICODE
+
+    wxUnusedVar(conv);
+    return wxString::FromUTF8(s, len);
 }
 
 // returns true if the given string contains only whitespaces
-bool wxIsWhiteOnly(const wxChar *buf)
+bool wxIsWhiteOnly(const wxString& buf)
 {
-    for (const wxChar *c = buf; *c != wxT('\0'); c++)
-        if (*c != wxT(' ') && *c != wxT('\t') && *c != wxT('\n') && *c != wxT('\r'))
+    for ( wxString::const_iterator i = buf.begin(); i != buf.end(); ++i )
+    {
+        wxChar c = *i;
+        if ( c != wxT(' ') && c != wxT('\t') && c != wxT('\n') && c != wxT('\r'))
             return false;
+    }
     return true;
 }
 
 
 struct wxXmlParsingContext
 {
+    wxXmlParsingContext()
+        : conv(NULL),
+          root(NULL),
+          node(NULL),
+          lastChild(NULL),
+          lastAsText(NULL),
+          removeWhiteOnlyNodes(false)
+    {}
+
+    XML_Parser parser;
     wxMBConv  *conv;
     wxXmlNode *root;
-    wxXmlNode *node;
-    wxXmlNode *lastAsText;
+    wxXmlNode *node;                    // the node being parsed
+    wxXmlNode *lastChild;               // the last child of "node"
+    wxXmlNode *lastAsText;              // the last _text_ child of "node"
     wxString   encoding;
     wxString   version;
-    bool       bLastCdata;
     bool       removeWhiteOnlyNodes;
 };
 
+// checks that ctx->lastChild is in consistent state
+#define ASSERT_LAST_CHILD_OK(ctx)                                   \
+    wxASSERT( ctx->lastChild == NULL ||                             \
+              ctx->lastChild->GetNext() == NULL );                  \
+    wxASSERT( ctx->lastChild == NULL ||                             \
+              ctx->lastChild->GetParent() == ctx->node )
+
 extern "C" {
 static void StartElementHnd(void *userData, const char *name, const char **atts)
 {
     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
-    wxXmlNode *node = new wxXmlNode(wxXML_ELEMENT_NODE, CharToString(ctx->conv, name));
+    wxXmlNode *node = new wxXmlNode(wxXML_ELEMENT_NODE,
+                                    CharToString(ctx->conv, name),
+                                    wxEmptyString,
+                                    XML_GetCurrentLineNumber(ctx->parser));
     const char **a = atts;
+
+    // add node attributes
     while (*a)
     {
-        node->AddProperty(CharToString(ctx->conv, a[0]), CharToString(ctx->conv, a[1]));
+        node->AddAttribute(CharToString(ctx->conv, a[0]), CharToString(ctx->conv, a[1]));
         a += 2;
     }
+
     if (ctx->root == NULL)
+    {
         ctx->root = node;
+    }
     else
-        ctx->node->AddChild(node);
-    ctx->node = node;
+    {
+        ASSERT_LAST_CHILD_OK(ctx);
+        ctx->node->InsertChildAfter(node, ctx->lastChild);
+    }
+
     ctx->lastAsText = NULL;
-}
+    ctx->lastChild = NULL; // our new node "node" has no children yet
+
+    ctx->node = node;
 }
 
-extern "C" {
 static void EndElementHnd(void *userData, const char* WXUNUSED(name))
 {
     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
 
+    // we're exiting the last children of ctx->node->GetParent() and going
+    // back one level up, so current value of ctx->node points to the last
+    // child of ctx->node->GetParent()
+    ctx->lastChild = ctx->node;
+
     ctx->node = ctx->node->GetParent();
     ctx->lastAsText = NULL;
 }
-}
 
-extern "C" {
 static void TextHnd(void *userData, const char *s, int len)
 {
     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
@@ -497,15 +583,7 @@ static void TextHnd(void *userData, const char *s, int len)
 
     if (ctx->lastAsText)
     {
-        if ( ctx->bLastCdata )
-        {
-            ctx->lastAsText->SetContent(ctx->lastAsText->GetContent() +
-                                        CharToString(NULL, s, len));
-        }
-        else
-        {
-            ctx->lastAsText->SetContent(ctx->lastAsText->GetContent() + str);
-        }
+        ctx->lastAsText->SetContent(ctx->lastAsText->GetContent() + str);
     }
     else
     {
@@ -515,52 +593,52 @@ static void TextHnd(void *userData, const char *s, int len)
 
         if (!whiteOnly)
         {
-            ctx->lastAsText = new wxXmlNode(wxXML_TEXT_NODE, wxT("text"), str);
-            ctx->node->AddChild(ctx->lastAsText);
+            wxXmlNode *textnode =
+                new wxXmlNode(wxXML_TEXT_NODE, wxT("text"), str,
+                              XML_GetCurrentLineNumber(ctx->parser));
+
+            ASSERT_LAST_CHILD_OK(ctx);
+            ctx->node->InsertChildAfter(textnode, ctx->lastChild);
+            ctx->lastChild= ctx->lastAsText = textnode;
         }
     }
 }
-}
 
-extern "C" {
 static void StartCdataHnd(void *userData)
 {
     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
 
-    ctx->bLastCdata = true;
-
-    ctx->lastAsText = new wxXmlNode(wxXML_CDATA_SECTION_NODE, wxT("cdata"),wxT(""));
-    ctx->node->AddChild(ctx->lastAsText);
-}
-}
-
-extern "C" {
-static void EndCdataHnd(void *userData)
-{
-    wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
+    wxXmlNode *textnode =
+        new wxXmlNode(wxXML_CDATA_SECTION_NODE, wxT("cdata"), wxT(""),
+                      XML_GetCurrentLineNumber(ctx->parser));
 
-    ctx->bLastCdata = false;
-}
+    ASSERT_LAST_CHILD_OK(ctx);
+    ctx->node->InsertChildAfter(textnode, ctx->lastChild);
+    ctx->lastChild= ctx->lastAsText = textnode;
 }
 
-extern "C" {
 static void CommentHnd(void *userData, const char *data)
 {
     wxXmlParsingContext *ctx = (wxXmlParsingContext*)userData;
 
     if (ctx->node)
     {
-        // VS: ctx->node == NULL happens if there is a comment before
-        //     the root element (e.g. wxDesigner's output). We ignore such
-        //     comments, no big deal...
-        ctx->node->AddChild(new wxXmlNode(wxXML_COMMENT_NODE,
-                            wxT("comment"), CharToString(ctx->conv, data)));
+        wxXmlNode *commentnode =
+            new wxXmlNode(wxXML_COMMENT_NODE,
+                          wxT("comment"), CharToString(ctx->conv, data),
+                          XML_GetCurrentLineNumber(ctx->parser));
+
+        ASSERT_LAST_CHILD_OK(ctx);
+        ctx->node->InsertChildAfter(commentnode, ctx->lastChild);
+        ctx->lastChild = commentnode;
     }
+    //else: ctx->node == NULL happens if there is a comment before
+    //      the root element. We current don't have a way to represent
+    //      these in wxXmlDocument (FIXME).
+
     ctx->lastAsText = NULL;
 }
-}
 
-extern "C" {
 static void DefaultHnd(void *userData, const char *s, int len)
 {
     // XML header:
@@ -578,17 +656,14 @@ static void DefaultHnd(void *userData, const char *s, int len)
             ctx->version = buf.Mid(pos + 9).BeforeFirst(buf[(size_t)pos+8]);
     }
 }
-}
 
-extern "C" {
 static int UnknownEncodingHnd(void * WXUNUSED(encodingHandlerData),
                               const XML_Char *name, XML_Encoding *info)
 {
     // We must build conversion table for expat. The easiest way to do so
     // is to let wxCSConv convert as string containing all characters to
     // wide character representation:
-    wxString str(name, wxConvLibc);
-    wxCSConv conv(str);
+    wxCSConv conv(name);
     char mbBuf[2];
     wchar_t wcBuf[10];
     size_t i;
@@ -612,7 +687,8 @@ static int UnknownEncodingHnd(void * WXUNUSED(encodingHandlerData),
 
     return 1;
 }
-}
+
+} // extern "C"
 
 bool wxXmlDocument::Load(wxInputStream& stream, const wxString& encoding, int flags)
 {
@@ -628,20 +704,19 @@ bool wxXmlDocument::Load(wxInputStream& stream, const wxString& encoding, int fl
     bool done;
     XML_Parser parser = XML_ParserCreate(NULL);
 
-    ctx.root = ctx.node = NULL;
     ctx.encoding = wxT("UTF-8"); // default in absence of encoding=""
     ctx.conv = NULL;
 #if !wxUSE_UNICODE
-    if ( encoding != wxT("UTF-8") && encoding != wxT("utf-8") )
+    if ( encoding.CmpNoCase(wxT("UTF-8")) != 0 )
         ctx.conv = new wxCSConv(encoding);
 #endif
     ctx.removeWhiteOnlyNodes = (flags & wxXMLDOC_KEEP_WHITESPACE_NODES) == 0;
-    ctx.bLastCdata = false;
+    ctx.parser = parser;
 
     XML_SetUserData(parser, (void*)&ctx);
     XML_SetElementHandler(parser, StartElementHnd, EndElementHnd);
     XML_SetCharacterDataHandler(parser, TextHnd);
-    XML_SetCdataSectionHandler(parser, StartCdataHnd, EndCdataHnd );
+    XML_SetStartCdataSectionHandler(parser, StartCdataHnd);
     XML_SetCommentHandler(parser, CommentHnd);
     XML_SetDefaultHandler(parser, DefaultHnd);
     XML_SetUnknownEncodingHandler(parser, UnknownEncodingHnd, NULL);
@@ -780,7 +855,7 @@ static void OutputNode(wxOutputStream& stream, wxXmlNode *node, int indent,
                        wxMBConv *convMem, wxMBConv *convFile, int indentstep)
 {
     wxXmlNode *n, *prev;
-    wxXmlProperty *prop;
+    wxXmlAttribute *attr;
 
     switch (node->GetType())
     {
@@ -798,14 +873,14 @@ static void OutputNode(wxOutputStream& stream, wxXmlNode *node, int indent,
             OutputString(stream, wxT("<"));
             OutputString(stream, node->GetName());
 
-            prop = node->GetProperties();
-            while (prop)
+            attr = node->GetAttributes();
+            while (attr)
             {
-                OutputString(stream, wxT(" ") + prop->GetName() +  wxT("=\""));
-                OutputStringEnt(stream, prop->GetValue(), convMem, convFile,
+                OutputString(stream, wxT(" ") + attr->GetName() +  wxT("=\""));
+                OutputStringEnt(stream, attr->GetValue(), convMem, convFile,
                                 XML_ESCAPE_QUOTES);
                 OutputString(stream, wxT("\""));
-                prop = prop->GetNext();
+                attr = attr->GetNext();
             }
 
             if (node->GetChildren())
@@ -849,17 +924,23 @@ bool wxXmlDocument::Save(wxOutputStream& stream, int indentstep) const
 
     wxString s;
 
-    wxMBConv *convMem = NULL;
+    wxMBConv *convMem = NULL,
+             *convFile;
 
 #if wxUSE_UNICODE
-    wxMBConv *convFile = new wxCSConv(GetFileEncoding());
+    convFile = new wxCSConv(GetFileEncoding());
+    convMem = NULL;
 #else
-    wxMBConv *convFile = NULL;
-    if ( GetFileEncoding() != GetEncoding() )
+    if ( GetFileEncoding().CmpNoCase(GetEncoding()) != 0 )
     {
         convFile = new wxCSConv(GetFileEncoding());
         convMem = new wxCSConv(GetEncoding());
     }
+    else // file and in-memory encodings are the same, no conversion needed
+    {
+        convFile =
+        convMem = NULL;
+    }
 #endif
 
     s.Printf(wxT("<?xml version=\"%s\" encoding=\"%s\"?>\n"),
@@ -869,10 +950,8 @@ bool wxXmlDocument::Save(wxOutputStream& stream, int indentstep) const
     OutputNode(stream, GetRoot(), 0, convMem, convFile, indentstep);
     OutputString(stream, wxT("\n"));
 
-    if ( convFile )
-        delete convFile;
-    if ( convMem )
-        delete convMem;
+    delete convFile;
+    delete convMem;
 
     return true;
 }