/* libs/graphics/xml/SkXMLWriter.cpp
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include "SkXMLWriter.h"
#include "SkStream.h"
SkXMLWriter::SkXMLWriter(bool doEscapeMarkup) : fDoEscapeMarkup(doEscapeMarkup)
{
}
SkXMLWriter::~SkXMLWriter()
{
SkASSERT(fElems.count() == 0);
}
void SkXMLWriter::flush()
{
while (fElems.count())
this->endElement();
}
void SkXMLWriter::addAttribute(const char name[], const char value[])
{
this->addAttributeLen(name, value, strlen(value));
}
void SkXMLWriter::addS32Attribute(const char name[], int32_t value)
{
SkString tmp;
tmp.appendS32(value);
this->addAttribute(name, tmp.c_str());
}
void SkXMLWriter::addHexAttribute(const char name[], uint32_t value, int minDigits)
{
SkString tmp("0x");
tmp.appendHex(value, minDigits);
this->addAttribute(name, tmp.c_str());
}
void SkXMLWriter::addScalarAttribute(const char name[], SkScalar value)
{
SkString tmp;
tmp.appendScalar(value);
this->addAttribute(name, tmp.c_str());
}
void SkXMLWriter::doEnd(Elem* elem)
{
delete elem;
}
bool SkXMLWriter::doStart(const char name[], size_t length)
{
int level = fElems.count();
bool firstChild = level > 0 && !fElems[level-1]->fHasChildren;
if (firstChild)
fElems[level-1]->fHasChildren = true;
Elem** elem = fElems.push();
*elem = new Elem;
(*elem)->fName.set(name, length);
(*elem)->fHasChildren = 0;
return firstChild;
}
SkXMLWriter::Elem* SkXMLWriter::getEnd()
{
Elem* elem;
fElems.pop(&elem);
return elem;
}
const char* SkXMLWriter::getHeader()
{
static const char gHeader[] = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>";
return gHeader;
}
void SkXMLWriter::startElement(const char name[])
{
this->startElementLen(name, strlen(name));
}
static const char* escape_char(char c, char storage[2])
{
static const char* gEscapeChars[] = {
"<<",
">>",
//"\""",
//"''",
"&&"
};
const char** array = gEscapeChars;
for (unsigned i = 0; i < SK_ARRAY_COUNT(gEscapeChars); i++)
{
if (array[i][0] == c)
return &array[i][1];
}
storage[0] = c;
storage[1] = 0;
return storage;
}
static size_t escape_markup(char dst[], const char src[], size_t length)
{
size_t extra = 0;
const char* stop = src + length;
while (src < stop)
{
char orig[2];
const char* seq = escape_char(*src, orig);
size_t seqSize = strlen(seq);
if (dst)
{
memcpy(dst, seq, seqSize);
dst += seqSize;
}
// now record the extra size needed
extra += seqSize - 1; // minus one to subtract the original char
// bump to the next src char
src += 1;
}
return extra;
}
void SkXMLWriter::addAttributeLen(const char name[], const char value[], size_t length)
{
SkString valueStr;
if (fDoEscapeMarkup)
{
size_t extra = escape_markup(NULL, value, length);
if (extra)
{
valueStr.resize(length + extra);
(void)escape_markup(valueStr.writable_str(), value, length);
value = valueStr.c_str();
length += extra;
}
}
this->onAddAttributeLen(name, value, length);
}
void SkXMLWriter::startElementLen(const char elem[], size_t length)
{
this->onStartElementLen(elem, length);
}
////////////////////////////////////////////////////////////////////////////////////////
static void write_dom(const SkDOM& dom, const SkDOM::Node* node, SkXMLWriter* w, bool skipRoot)
{
if (!skipRoot)
{
w->startElement(dom.getName(node));
SkDOM::AttrIter iter(dom, node);
const char* name;
const char* value;
while ((name = iter.next(&value)) != NULL)
w->addAttribute(name, value);
}
node = dom.getFirstChild(node, NULL);
while (node)
{
write_dom(dom, node, w, false);
node = dom.getNextSibling(node, NULL);
}
if (!skipRoot)
w->endElement();
}
void SkXMLWriter::writeDOM(const SkDOM& dom, const SkDOM::Node* node, bool skipRoot)
{
if (node)
write_dom(dom, node, this, skipRoot);
}
void SkXMLWriter::writeHeader()
{
}
// SkXMLStreamWriter
static void tab(SkWStream& stream, int level)
{
for (int i = 0; i < level; i++)
stream.writeText("\t");
}
SkXMLStreamWriter::SkXMLStreamWriter(SkWStream* stream) : fStream(*stream)
{
}
SkXMLStreamWriter::~SkXMLStreamWriter()
{
this->flush();
}
void SkXMLStreamWriter::onAddAttributeLen(const char name[], const char value[], size_t length)
{
SkASSERT(!fElems.top()->fHasChildren);
fStream.writeText(" ");
fStream.writeText(name);
fStream.writeText("=\"");
fStream.write(value, length);
fStream.writeText("\"");
}
void SkXMLStreamWriter::onEndElement()
{
Elem* elem = getEnd();
if (elem->fHasChildren)
{
tab(fStream, fElems.count());
fStream.writeText("</");
fStream.writeText(elem->fName.c_str());
fStream.writeText(">");
}
else
fStream.writeText("/>");
fStream.newline();
doEnd(elem);
}
void SkXMLStreamWriter::onStartElementLen(const char name[], size_t length)
{
int level = fElems.count();
if (this->doStart(name, length))
{
// the first child, need to close with >
fStream.writeText(">");
fStream.newline();
}
tab(fStream, level);
fStream.writeText("<");
fStream.write(name, length);
}
void SkXMLStreamWriter::writeHeader()
{
const char* header = getHeader();
fStream.write(header, strlen(header));
fStream.newline();
}
////////////////////////////////////////////////////////////////////////////////////////////////
#include "SkXMLParser.h"
SkXMLParserWriter::SkXMLParserWriter(SkXMLParser* parser)
: SkXMLWriter(false), fParser(*parser)
{
}
SkXMLParserWriter::~SkXMLParserWriter()
{
this->flush();
}
void SkXMLParserWriter::onAddAttributeLen(const char name[], const char value[], size_t length)
{
SkASSERT(fElems.count() == 0 || !fElems.top()->fHasChildren);
SkString str(value, length);
fParser.addAttribute(name, str.c_str());
}
void SkXMLParserWriter::onEndElement()
{
Elem* elem = this->getEnd();
fParser.endElement(elem->fName.c_str());
this->doEnd(elem);
}
void SkXMLParserWriter::onStartElementLen(const char name[], size_t length)
{
(void)this->doStart(name, length);
SkString str(name, length);
fParser.startElement(str.c_str());
}
////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////
#ifdef SK_DEBUG
void SkXMLStreamWriter::UnitTest()
{
#ifdef SK_SUPPORT_UNITTEST
SkDebugWStream s;
SkXMLStreamWriter w(&s);
w.startElement("elem0");
w.addAttribute("hello", "world");
w.addS32Attribute("dec", 42);
w.addHexAttribute("hex", 0x42, 3);
#ifdef SK_SCALAR_IS_FLOAT
w.addScalarAttribute("scalar", -4.2f);
#endif
w.startElement("elem1");
w.endElement();
w.startElement("elem1");
w.addAttribute("name", "value");
w.endElement();
w.startElement("elem1");
w.startElement("elem2");
w.startElement("elem3");
w.addAttribute("name", "value");
w.endElement();
w.endElement();
w.startElement("elem2");
w.endElement();
w.endElement();
w.endElement();
#endif
}
#endif