From 179fa413b047bede6e32109e2ce82437c5fb8d34 Mon Sep 17 00:00:00 2001
From: MenTaLguY <mental@rydia.net>
Date: Mon, 16 Jan 2006 02:36:01 +0000
Subject: moving trunk for module inkscape

(bzr r1)
---
 src/dom/xmlreader.cpp | 981 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 981 insertions(+)
 create mode 100755 src/dom/xmlreader.cpp

(limited to 'src/dom/xmlreader.cpp')

diff --git a/src/dom/xmlreader.cpp b/src/dom/xmlreader.cpp
new file mode 100755
index 000000000..d475afdea
--- /dev/null
+++ b/src/dom/xmlreader.cpp
@@ -0,0 +1,981 @@
+/**
+ * Phoebe DOM Implementation.
+ *
+ * This is a C++ approximation of the W3C DOM model, which follows
+ * fairly closely the specifications in the various .idl files, copies of
+ * which are provided for reference.  Most important is this one:
+ *
+ * http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/idl-definitions.html
+ *
+ * Authors:
+ *   Bob Jamison
+ *
+ * Copyright (C) 2005 Bob Jamison
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+
+
+#include "xmlreader.h"
+#include "svgimpl.h"
+
+#include <stdarg.h>
+
+namespace org {
+namespace w3c {
+namespace dom {
+
+
+//#########################################################################
+//# E N T I T Y    T A B L E
+//#########################################################################
+struct EntityInfo
+{
+    char *escape;
+    int  escapeLength;
+    char *value;
+};
+
+
+static EntityInfo entityTable[] =
+{
+    { "&amp;"  , 5 , "&"  },
+    { "&lt;"   , 4 , "<"  },
+    { "&gt;"   , 4 , ">"  },
+    { "&apos;" , 6 , "'"  },
+    { "&quot;" , 6 , "\"" },
+    { NULL     , 0 , "\0" }
+};
+
+
+
+//#########################################################################
+//# M E S S A G E S
+//#########################################################################
+
+
+/**
+ *
+ */
+void XmlReader::error(char *fmt, ...)
+{
+    va_list args;
+    fprintf(stderr, "XmlReader:error at line %d, column %d:", lineNr, colNr);
+    va_start(args, fmt);
+    vfprintf(stderr, fmt, args);
+    va_end(args) ;
+    fprintf(stderr, "\n");
+}
+
+
+
+//#########################################################################
+//# U T I L I T Y
+//#########################################################################
+
+static void trim(DOMString &str)
+{
+    int len = str.size();
+    if (len<1)
+        return;
+
+    int start = 0;
+    int end = 0;
+    for (start=0 ; start<len ; start++)
+        {
+        int ch = str[start];
+        if (ch<=' ' || ch>126)
+            break;
+        }
+    for (end=len-1 ; end>=0 ; end--)
+        {
+        int ch = str[end];
+        if (ch<=' ' || ch>126)
+            break;
+        }
+    if (start<end)
+        {
+        str = str.substr(start, end+1);
+        }
+}
+
+//#########################################################################
+//# P A R S I N G
+//#########################################################################
+
+/**
+ *  Get the character at the position and record the fact
+ */
+int XmlReader::get(int p)
+{
+    if (p >= len)
+        return -1;
+    int ch = parsebuf[p];
+    //printf("%c", ch);
+    if (ch == '\n' || ch == '\r')
+        {
+        colNr = 0;
+        lineNr++;
+        }
+    else
+        colNr++;
+    return ch;
+}
+
+/**
+ *  Look at the character at the position, but don't note the fact
+ */
+int XmlReader::peek(int p)
+{
+    if (p >= len)
+        return -1;
+    int ch = parsebuf[p];
+    return ch;
+}
+
+
+/**
+ *  Test if the given substring exists at the given position
+ *  in parsebuf.  Use peek() in case of out-of-bounds
+ */
+bool XmlReader::match(int pos, char *str)
+{
+    while (*str)
+       {
+       if (peek(pos++) != *str++)
+           return false;
+       }
+   return true;
+}
+
+
+
+/**
+ *  Test if the given substring exists at the given position
+ *  in a given buffer
+ */
+/*
+static bool bufMatch(const DOMString &buf, int pos, char *str)
+{
+    while (*str)
+       {
+       if (buf[pos++] != *str++)
+           return false;
+       }
+   return true;
+}
+*/
+
+
+/**
+ *
+ */
+int XmlReader::skipwhite(int p)
+{
+  while (p < len)
+    {
+    int b = get(p);
+    if (!isspace(b))
+        break;
+    p++;
+    }
+  return p;
+}
+
+/**
+ * modify this to allow all chars for an element or attribute name
+ */
+int XmlReader::getWord(int p, DOMString &result)
+{
+    while (p<len)
+        {
+        int b = get(p);
+        if (b<=' ' || b=='/' || b=='>' || b=='=')
+            break;
+        result.push_back(b);
+        p++;
+        }
+    return p;
+}
+
+/**
+ * get a name and prefix, if any
+ */
+int XmlReader::getPrefixedWord(int p, DOMString &prefix,
+                DOMString &shortWord, DOMString &fullWord)
+{
+    while (p<len)
+        {
+        int b = get(p);
+        if (b<=' ' || b=='/' || b=='>' || b=='=')
+            break;
+        else if (b == ':')
+            {
+            prefix = shortWord;
+            shortWord = "";
+            }
+        else
+            shortWord.push_back(b);
+        p++;
+        }
+    if (prefix.size() > 0)
+        fullWord = prefix + ":" + shortWord;
+    else
+        fullWord = shortWord;
+    return p;
+}
+
+
+/**
+ * Assume that we are starting on a quote.  Ends on the char
+ * after the final '"'
+ */
+int XmlReader::getQuoted(int p0, DOMString &result)
+{
+
+    int p = p0;
+
+    if (peek(p)!='"' && peek(p)!='\'')
+        return p0;
+
+    int b = get(p++); //go to next char
+
+    DOMString buf;
+
+    while (p<len )
+        {
+        b = get(p++);
+        if (b=='"' || b=='\'')
+            break;
+        else if (b=='&')
+            {
+            p = parseEntity(p, result);
+            if (p < 0)
+                return p0;
+            }
+        else
+            {
+            buf.push_back(b);
+            }
+        }
+
+    //printf("quoted text:'%s'\n", buf.c_str());
+
+    result.append(buf);
+
+    return p;
+}
+
+
+
+/**
+ * Parse a <!xml> tag.  Node may be null.  Assumes current char is '<'
+ * ends on char after '>'
+ */
+int XmlReader::parseVersion(int p0)
+{
+    int p = p0;
+
+    if (!match(p, "<?xml"))
+        return p0;
+
+    p     += 5;
+    colNr += 5;
+
+    bool quickCloseDummy;
+    Node *node = new NodeImpl();
+    int p2 = parseAttributes(p, node, &quickCloseDummy);
+    if (p2 < p)
+        {
+        delete node;
+        return p0;
+        }
+    p = p2;
+
+    //get the attributes that we need
+    NamedNodeMap attributes = node->getAttributes();
+    Node *attr = attributes.getNamedItem("version");
+    if (attr)
+        document->setXmlVersion(attr->getNodeValue());
+    attr = attributes.getNamedItem("encoding");
+    if (attr)
+        { /*document->setXmlEncoding(attr->getNodeValue());*/ }
+    attr = attributes.getNamedItem("standalone");
+    if (attr)
+        document->setXmlStandalone((attr->getNodeValue() == "yes"));
+    delete node;
+
+    //#now we should be pointing at '?>'
+    if (!match(p, "?>"))
+        {
+        return p0;
+        }
+
+    //skip over '?>'
+    get(p++);
+    get(p++);
+
+    return p;
+}
+
+
+/**
+ *  Parse a <!DOCTYPE> tag.  doctype may be null.  Expects '<'
+ *  on start.  Ends pointing at char after '>'
+ */
+int XmlReader::parseDoctype(int p0)
+{
+    int p = p0;
+
+    if (!match(p, "<!DOCTYPE"))
+        return p0;
+
+    p     += 9;
+    colNr += 9;
+
+    DocumentType *doctype = document->getDoctype();
+    if (!doctype)
+        return p0;
+
+
+    //### get the root name of the document
+    p = skipwhite(p);
+    DOMString rootName;
+    int p2 = getWord(p, rootName);
+    if (p2 <= p)
+        return p0;
+    p = p2;
+    //printf("doctype root '%s'\n", rootName.c_str());
+
+
+    while (p < len)
+        {
+        p = skipwhite(p);
+        if (peek(p) == '>')
+            break;
+        else if (peek(p) == '[') //just ignore 'internal' [] stuff
+            {
+            while (p < len)
+                {
+                int ch = get(p++);
+                if (ch == ']')
+                    break;
+                }
+            p++;
+            }
+        else if (match(p, "PUBLIC"))
+            {
+            p     += 6;
+            colNr += 6;
+            p = skipwhite(p);
+            DOMString pubIdLiteral;
+            int p2 = getQuoted(p, pubIdLiteral);
+            if (p2 <= p)
+                return p0;
+            p = p2;
+            p = skipwhite(p);
+            DOMString systemLiteral;
+            p2 = getQuoted(p, systemLiteral);
+            if (p2 <= p)
+                return p0;
+            p = p2;
+            //printf("PUBLIC \"%s\" \"%s\" \n",
+            //     pubIdLiteral.c_str(), systemLiteral.c_str());
+            }
+        else if (match(p, "SYSTEM"))
+            {
+            p     += 6;
+            colNr += 6;
+            p = skipwhite(p);
+            DOMString systemLiteral;
+            int p2 = getQuoted(p, systemLiteral);
+            if (p2 <= p)
+                return p0;
+            p = p2;
+            //printf("SYSTEM \"%s\" \n", systemLiteral.c_str());
+            }
+        }
+
+
+    //skip over '>'
+    get(p++);
+
+    return p;
+}
+
+
+
+/**
+ *  Expects '<' on startup, ends on char after '>'
+ */
+int XmlReader::parseComment(int p0, Comment *comment)
+{
+    int p = p0;
+
+    if (!match(p, "<!--"))
+        return p0;
+
+    colNr += 4;
+    p     += 4;
+
+    DOMString buf;
+
+    while (p<len-3)
+        {
+        if (match(p, "-->"))
+            {
+            p     += 3;
+            colNr += 3;
+            break;
+            }
+        int ch = get(p++);
+        buf.push_back(ch);
+        }
+
+    comment->setNodeValue(buf);
+
+    return p;
+}
+
+
+
+/**
+ *
+ */
+int XmlReader::parseCDATA(int p0, CDATASection *cdata)
+{
+
+    int p = p0;
+
+    if (!match(p, "<![CDATA["))
+        return p0;
+
+    colNr += 9;
+    p     += 9;
+
+    DOMString buf;
+
+    while (p<len)
+        {
+        if (match(p, "]]>"))
+            {
+            p     +=3;
+            colNr += 3;
+            break;
+            }
+        int ch = get(p++);
+        buf.push_back(ch);
+        }
+
+    /*printf("Got CDATA:%s\n",buf.c_str());*/
+    cdata->setNodeValue(buf);
+
+    return p;
+}
+
+
+
+/**
+ *
+ */
+int XmlReader::parseText(int p0, Text *text)
+{
+
+    int p = p0;
+
+    DOMString buf;
+
+    while (p<len)
+        {
+        if (peek(p) == '&')
+            {
+            p = parseEntity(p, buf);
+            if (p < 0) //error?
+                return p0;
+            }
+        else if (peek(p) == '<')
+            {
+            break;
+            }
+        else
+            {
+            int ch = get(p++);
+            buf.push_back(ch);
+            }
+        }
+
+    /*printf("Got Text:%s\n",buf.c_str());*/
+    text->setNodeValue(buf);
+
+    return p;
+}
+
+
+
+
+
+/**
+ * Parses attributes of a node.  Should end pointing at either the
+ * '?' of a version or doctype tag, or a '>' of a normal tag
+ */
+int XmlReader::parseAttributes(int p0, Node *node, bool *quickClose)
+{
+    *quickClose = false;
+
+    int p = p0;
+
+    NamedNodeMap attributes;
+
+    while (p<len)
+        {
+        /*printf("ch:%c\n",ch);*/
+        p  = skipwhite(p);
+        int ch = get(p);
+
+        /*printf("ch:%c\n",ch);*/
+        if (ch == '?'  ||  ch == '>')//done
+            break;
+        else if (ch=='/' && p<len+1)
+            {
+            p++;
+            p = skipwhite(p);
+            ch = peek(p);
+            if (ch == '>')
+                {
+                p++;
+                *quickClose = true;
+                /*printf("quick close\n");*/
+                return p;
+                }
+            }
+        DOMString shortName;
+        DOMString prefix;
+        DOMString qualifiedName;
+        int p2 = getPrefixedWord(p, prefix, shortName, qualifiedName);
+        if (p2 <= p)
+            break;
+
+        /*printf("name:%s",buf);*/
+        p = p2;
+        p = skipwhite(p);
+        ch = get(p);
+        /*printf("ch:%c\n",ch);*/
+        if (ch != '=')
+            break;
+        p++;
+        p = skipwhite(p);
+        /*ch = parsebuf[p];*/
+        /*printf("ch:%c\n",ch);*/
+        DOMString attrValue;
+        p2 = getQuoted(p, attrValue);
+        p  = p2;
+        /*printf("name:'%s'   value:'%s'\n",buf,buf2);*/
+
+        DOMString namespaceURI = "";
+        if (prefix == "xmlns" || shortName == "xmlns")
+            namespaceURI = XMLNSNAME;
+
+        //## Now let us make the attribute and give it to the node
+        Attr *attr = document->createAttributeNS(namespaceURI, qualifiedName);
+        attr->setValue(attrValue);
+        node->getAttributes().setNamedItemNS(attr);
+
+        }//while p<len
+
+    return p;
+}
+
+/**
+ * Appends the value of an entity to the buffer
+ */
+int XmlReader::parseEntity(int p0, DOMString &buf)
+{
+    int p = p0;
+    for (EntityInfo *info = entityTable ; info->escape ; info++)
+        {
+        if (match(p, info->escape))
+            {
+            p     += info->escapeLength;
+            colNr += info->escapeLength;
+            buf   += info->value;
+            return p;
+            }
+        }
+
+    error("unterminated entity");
+    return -1;
+}
+
+
+//#########################################################################
+//# P A R S E    A    N O D E
+//#########################################################################
+
+/**
+ *  Parse as a document, preserving the original structure as much as
+ *  possible
+ */
+int XmlReader::parseNode(int p0, Node *node, int depth)
+{
+
+    int p = p0;
+
+
+    //### OPEN TAG
+    int ch = get(p++);
+    if (ch !=  '<')
+        return p0;
+
+    p = skipwhite(p);
+    DOMString openTagName;
+    DOMString openTagNamePrefix;
+    DOMString openTagQualifiedName;
+    int p2 = getPrefixedWord(p,openTagNamePrefix,
+                    openTagName, openTagQualifiedName);
+    if (p2 <= p)
+        return p0;
+    p = p2;
+    p = skipwhite(p);
+
+    //printf("qualifiedName:%s\n", openTagQualifiedName.c_str());
+    DOMString namespaceURI = node->lookupNamespaceURI(openTagNamePrefix);
+    document->renameNode(node, namespaceURI, openTagQualifiedName);
+
+    //### ATTRIBUTES
+    bool quickClose;
+    p = parseAttributes(p, node, &quickClose);
+    if (quickClose)  //trivial tag:  <name/>
+        return p;
+
+    p++; //skip over '>'
+
+
+    DOMString nodeValue;
+
+    /* ### Get intervening data ### */
+    while (p<len && keepGoing)
+        {
+        //### COMMENT
+        if (match(p, "<!--"))
+            {
+            Comment *comment = document->createComment("");
+            p2 = parseComment(p, comment);
+            if (p2 <= p)
+                return p0;
+            p = p2;
+            if (parseAsData)
+                { //throw away
+                delete comment;
+                }
+            else
+                {
+                node->appendChild(comment);
+                }
+            }
+        //### VERSION
+        else if (match(p, "<?xml"))
+            {
+            p2 = parseVersion(p);
+            if (p2 <= p)
+                return p0;
+            }
+        //### DOCTYPE
+        else if (match(p, "<!DOCTYPE"))
+            {
+            p2 = parseDoctype(p);
+            if (p2 <= p)
+                return p0;
+            }
+        //### CDATA
+        else if (match(p, "<![CDATA["))
+            {
+            CDATASection *cdata = document->createCDATASection("");
+            p2 = parseCDATA(p, cdata);
+            if (p2 <= p)
+                return p0;
+            p = p2;
+            if (parseAsData)
+                {
+                nodeValue += cdata->getNodeValue();
+                delete cdata;
+                }
+            else
+                {
+                node->appendChild(cdata);
+                }
+            }
+         //### OPEN OR CLOSE TAG
+        else if (peek(p) == '<')
+            {
+            p2 = skipwhite(p+1);
+            if (peek(p2) =='/')
+                {
+                p = p2;
+                break;
+                }
+            else
+                {
+                /*Add element to tree*/
+                Element *elem = document->createElement(""); //fill in name later
+                node->appendChild(elem);
+                p2 = parseNode(p, elem, depth+1);
+                if (p2 <= p)
+                    {
+                    /*printf("problem on element:%ls.  p2:%d p:%d\n",n->name, p2, p);*/
+                    return p0;
+                    }
+                p = p2;
+                }
+            }
+        //### TEXT
+        else
+            {
+            Text *text = document->createTextNode("");
+            p2 = parseText(p, text);
+            if (p2 <= p)
+                return p0;
+            p = p2;
+            if (parseAsData)
+                {
+                nodeValue += text->getNodeValue();
+                delete text;
+                }
+            else
+                {
+                node->appendChild(text);
+                }
+            }
+
+        }//while (p<len)
+
+    //printf("%d : nodeValue:'%s'\n", p, nodeValue.c_str());
+    trim(nodeValue);
+    node->setNodeValue(nodeValue);
+
+    //### get close tag.  we should be pointing at '/'
+    p = skipwhite(p);
+    ch = get(p);
+    if (ch != '/')
+        {
+        error("no / on end tag");
+        return p0;
+        }
+    p++;
+
+    //### get word after '/'
+    p = skipwhite(p);
+    DOMString closeTagName;
+    DOMString closeTagNamePrefix;
+    DOMString closeTagQualifiedName;
+    p = getPrefixedWord(p, closeTagNamePrefix, closeTagName,
+                        closeTagQualifiedName);
+    if (openTagQualifiedName != closeTagQualifiedName)
+        {
+        error("Mismatched closing tag.  Expected </%S>. Got '%S'.",
+              openTagQualifiedName.c_str(), closeTagQualifiedName.c_str());
+        return p0;
+        }
+    p = skipwhite(p);
+    if (parsebuf[p] != '>')
+        {
+        error("no > on end tag");
+        return p0;
+        }
+    p++;
+    /*printf("close element:%ls\n",buf);*/
+    return p;
+}
+
+
+/**
+ *
+ */
+org::w3c::dom::Document *
+XmlReader::parse(const DOMString &buf, int bufferOffset, int parseLen)
+{
+    len      = parseLen;
+    parsebuf = buf;
+
+    DOMImplementationSourceImpl source;
+    DOMImplementation *domImpl = source.getDOMImplementation("");
+
+    keepGoing = true;
+
+    document = domImpl->createDocument("", "", NULL);
+    //document = new svg::SVGDocumentImpl(domImpl, "", "", NULL);
+
+    int p  = bufferOffset;
+    int p2 = 0;
+
+    while (p<len && keepGoing)
+        {
+        p = skipwhite(p);
+        //### COMMENT
+        if (match(p, "<!--"))
+            {
+            Comment *comment = document->createComment("");
+            p2 = parseComment(p, comment);
+            if (p2 <= p)
+                return document;
+            p = p2;
+            if (parseAsData)
+                { //throw away
+                delete comment;
+                }
+            else
+                {
+                document->appendChild(comment);
+                }
+            }
+        //### VERSION
+        else if (match(p, "<?xml"))
+            {
+            p2 = parseVersion(p);
+            if (p2 <= p)
+                return document;
+            p = p2;
+            }
+        //### DOCTYPE
+        else if (match(p, "<!DOCTYPE"))
+            {
+            p2 = parseDoctype(p);
+            if (p2 <= p)
+                return document;
+            p = p2;
+            }
+        else
+            {
+            break;
+            }
+        }
+
+    p = skipwhite(p);
+    p = parseNode(p, document->getDocumentElement(), 0);
+
+    keepGoing = false;
+
+    return document;
+}
+
+
+/**
+ *
+ */
+org::w3c::dom::Document *
+XmlReader::parse(const DOMString &str)
+{
+
+    Document *doc = parse(str, 0, str.size());
+    doc->normalizeDocument();
+
+    return doc;
+}
+
+/**
+ *
+ */
+org::w3c::dom::Document *
+XmlReader::parseFile(char *fileName)
+{
+
+    DOMString buf = loadFile(fileName);
+
+    Document *doc = parse(buf, 0, buf.size());
+
+    return doc;
+}
+
+
+
+//#########################################################################
+//# S T R E A M    R E A D I N G
+//#########################################################################
+
+/**
+ *
+ */
+org::w3c::dom::DOMString
+XmlReader::loadFile(char *fileName)
+{
+
+    if (!fileName)
+        return NULL;
+    FILE *f = fopen(fileName, "rb");
+    if (!f)
+        return NULL;
+
+    DOMString buf;
+    while (!feof(f))
+        {
+        int ch = fgetc(f);
+        if (ch<0)
+            break;
+        buf.push_back(ch);
+        }
+    fclose(f);
+
+    return buf;
+}
+
+
+//#########################################################################
+//# C O N S T R U C T O R    /    D E S T R U C T O R
+//#########################################################################
+
+
+/**
+ *
+ */
+XmlReader::XmlReader()
+{
+    len         = 0;
+    lineNr      = 1;
+    colNr       = 0;
+    parseAsData = false;
+    keepGoing   = false;
+}
+
+/**
+ *
+ */
+XmlReader::XmlReader(bool parseAsDataArg)
+{
+    len         = 0;
+    lineNr      = 1;
+    colNr       = 0;
+    parseAsData = parseAsDataArg;
+    keepGoing   = false;
+}
+
+
+
+/**
+ *
+ */
+XmlReader::~XmlReader()
+{
+}
+
+
+}  //namespace dom
+}  //namespace w3c
+}  //namespace org
+
+
+//#########################################################################
+//# E N D    O F    F I L E
+//#########################################################################
+
-- 
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