1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/xml/SkXMLWriter.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,331 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#include "SkXMLWriter.h"
1.14 +#include "SkStream.h"
1.15 +
1.16 +SkXMLWriter::SkXMLWriter(bool doEscapeMarkup) : fDoEscapeMarkup(doEscapeMarkup)
1.17 +{
1.18 +}
1.19 +
1.20 +SkXMLWriter::~SkXMLWriter()
1.21 +{
1.22 + SkASSERT(fElems.count() == 0);
1.23 +}
1.24 +
1.25 +void SkXMLWriter::flush()
1.26 +{
1.27 + while (fElems.count())
1.28 + this->endElement();
1.29 +}
1.30 +
1.31 +void SkXMLWriter::addAttribute(const char name[], const char value[])
1.32 +{
1.33 + this->addAttributeLen(name, value, strlen(value));
1.34 +}
1.35 +
1.36 +void SkXMLWriter::addS32Attribute(const char name[], int32_t value)
1.37 +{
1.38 + SkString tmp;
1.39 + tmp.appendS32(value);
1.40 + this->addAttribute(name, tmp.c_str());
1.41 +}
1.42 +
1.43 +void SkXMLWriter::addHexAttribute(const char name[], uint32_t value, int minDigits)
1.44 +{
1.45 + SkString tmp("0x");
1.46 + tmp.appendHex(value, minDigits);
1.47 + this->addAttribute(name, tmp.c_str());
1.48 +}
1.49 +
1.50 +void SkXMLWriter::addScalarAttribute(const char name[], SkScalar value)
1.51 +{
1.52 + SkString tmp;
1.53 + tmp.appendScalar(value);
1.54 + this->addAttribute(name, tmp.c_str());
1.55 +}
1.56 +
1.57 +void SkXMLWriter::doEnd(Elem* elem)
1.58 +{
1.59 + delete elem;
1.60 +}
1.61 +
1.62 +bool SkXMLWriter::doStart(const char name[], size_t length)
1.63 +{
1.64 + int level = fElems.count();
1.65 + bool firstChild = level > 0 && !fElems[level-1]->fHasChildren;
1.66 + if (firstChild)
1.67 + fElems[level-1]->fHasChildren = true;
1.68 + Elem** elem = fElems.push();
1.69 + *elem = new Elem;
1.70 + (*elem)->fName.set(name, length);
1.71 + (*elem)->fHasChildren = 0;
1.72 + return firstChild;
1.73 +}
1.74 +
1.75 +SkXMLWriter::Elem* SkXMLWriter::getEnd()
1.76 +{
1.77 + Elem* elem;
1.78 + fElems.pop(&elem);
1.79 + return elem;
1.80 +}
1.81 +
1.82 +const char* SkXMLWriter::getHeader()
1.83 +{
1.84 + static const char gHeader[] = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>";
1.85 + return gHeader;
1.86 +}
1.87 +
1.88 +void SkXMLWriter::startElement(const char name[])
1.89 +{
1.90 + this->startElementLen(name, strlen(name));
1.91 +}
1.92 +
1.93 +static const char* escape_char(char c, char storage[2])
1.94 +{
1.95 + static const char* gEscapeChars[] = {
1.96 + "<<",
1.97 + ">>",
1.98 + //"\""",
1.99 + //"''",
1.100 + "&&"
1.101 + };
1.102 +
1.103 + const char** array = gEscapeChars;
1.104 + for (unsigned i = 0; i < SK_ARRAY_COUNT(gEscapeChars); i++)
1.105 + {
1.106 + if (array[i][0] == c)
1.107 + return &array[i][1];
1.108 + }
1.109 + storage[0] = c;
1.110 + storage[1] = 0;
1.111 + return storage;
1.112 +}
1.113 +
1.114 +static size_t escape_markup(char dst[], const char src[], size_t length)
1.115 +{
1.116 + size_t extra = 0;
1.117 + const char* stop = src + length;
1.118 +
1.119 + while (src < stop)
1.120 + {
1.121 + char orig[2];
1.122 + const char* seq = escape_char(*src, orig);
1.123 + size_t seqSize = strlen(seq);
1.124 +
1.125 + if (dst)
1.126 + {
1.127 + memcpy(dst, seq, seqSize);
1.128 + dst += seqSize;
1.129 + }
1.130 +
1.131 + // now record the extra size needed
1.132 + extra += seqSize - 1; // minus one to subtract the original char
1.133 +
1.134 + // bump to the next src char
1.135 + src += 1;
1.136 + }
1.137 + return extra;
1.138 +}
1.139 +
1.140 +void SkXMLWriter::addAttributeLen(const char name[], const char value[], size_t length)
1.141 +{
1.142 + SkString valueStr;
1.143 +
1.144 + if (fDoEscapeMarkup)
1.145 + {
1.146 + size_t extra = escape_markup(NULL, value, length);
1.147 + if (extra)
1.148 + {
1.149 + valueStr.resize(length + extra);
1.150 + (void)escape_markup(valueStr.writable_str(), value, length);
1.151 + value = valueStr.c_str();
1.152 + length += extra;
1.153 + }
1.154 + }
1.155 + this->onAddAttributeLen(name, value, length);
1.156 +}
1.157 +
1.158 +void SkXMLWriter::startElementLen(const char elem[], size_t length)
1.159 +{
1.160 + this->onStartElementLen(elem, length);
1.161 +}
1.162 +
1.163 +////////////////////////////////////////////////////////////////////////////////////////
1.164 +
1.165 +static void write_dom(const SkDOM& dom, const SkDOM::Node* node, SkXMLWriter* w, bool skipRoot)
1.166 +{
1.167 + if (!skipRoot)
1.168 + {
1.169 + w->startElement(dom.getName(node));
1.170 +
1.171 + SkDOM::AttrIter iter(dom, node);
1.172 + const char* name;
1.173 + const char* value;
1.174 + while ((name = iter.next(&value)) != NULL)
1.175 + w->addAttribute(name, value);
1.176 + }
1.177 +
1.178 + node = dom.getFirstChild(node, NULL);
1.179 + while (node)
1.180 + {
1.181 + write_dom(dom, node, w, false);
1.182 + node = dom.getNextSibling(node, NULL);
1.183 + }
1.184 +
1.185 + if (!skipRoot)
1.186 + w->endElement();
1.187 +}
1.188 +
1.189 +void SkXMLWriter::writeDOM(const SkDOM& dom, const SkDOM::Node* node, bool skipRoot)
1.190 +{
1.191 + if (node)
1.192 + write_dom(dom, node, this, skipRoot);
1.193 +}
1.194 +
1.195 +void SkXMLWriter::writeHeader()
1.196 +{
1.197 +}
1.198 +
1.199 +// SkXMLStreamWriter
1.200 +
1.201 +static void tab(SkWStream& stream, int level)
1.202 +{
1.203 + for (int i = 0; i < level; i++)
1.204 + stream.writeText("\t");
1.205 +}
1.206 +
1.207 +SkXMLStreamWriter::SkXMLStreamWriter(SkWStream* stream) : fStream(*stream)
1.208 +{
1.209 +}
1.210 +
1.211 +SkXMLStreamWriter::~SkXMLStreamWriter()
1.212 +{
1.213 + this->flush();
1.214 +}
1.215 +
1.216 +void SkXMLStreamWriter::onAddAttributeLen(const char name[], const char value[], size_t length)
1.217 +{
1.218 + SkASSERT(!fElems.top()->fHasChildren);
1.219 + fStream.writeText(" ");
1.220 + fStream.writeText(name);
1.221 + fStream.writeText("=\"");
1.222 + fStream.write(value, length);
1.223 + fStream.writeText("\"");
1.224 +}
1.225 +
1.226 +void SkXMLStreamWriter::onEndElement()
1.227 +{
1.228 + Elem* elem = getEnd();
1.229 + if (elem->fHasChildren)
1.230 + {
1.231 + tab(fStream, fElems.count());
1.232 + fStream.writeText("</");
1.233 + fStream.writeText(elem->fName.c_str());
1.234 + fStream.writeText(">");
1.235 + }
1.236 + else
1.237 + fStream.writeText("/>");
1.238 + fStream.newline();
1.239 + doEnd(elem);
1.240 +}
1.241 +
1.242 +void SkXMLStreamWriter::onStartElementLen(const char name[], size_t length)
1.243 +{
1.244 + int level = fElems.count();
1.245 + if (this->doStart(name, length))
1.246 + {
1.247 + // the first child, need to close with >
1.248 + fStream.writeText(">");
1.249 + fStream.newline();
1.250 + }
1.251 +
1.252 + tab(fStream, level);
1.253 + fStream.writeText("<");
1.254 + fStream.write(name, length);
1.255 +}
1.256 +
1.257 +void SkXMLStreamWriter::writeHeader()
1.258 +{
1.259 + const char* header = getHeader();
1.260 + fStream.write(header, strlen(header));
1.261 + fStream.newline();
1.262 +}
1.263 +
1.264 +////////////////////////////////////////////////////////////////////////////////////////////////
1.265 +
1.266 +#include "SkXMLParser.h"
1.267 +
1.268 +SkXMLParserWriter::SkXMLParserWriter(SkXMLParser* parser)
1.269 + : SkXMLWriter(false), fParser(*parser)
1.270 +{
1.271 +}
1.272 +
1.273 +SkXMLParserWriter::~SkXMLParserWriter()
1.274 +{
1.275 + this->flush();
1.276 +}
1.277 +
1.278 +void SkXMLParserWriter::onAddAttributeLen(const char name[], const char value[], size_t length)
1.279 +{
1.280 + SkASSERT(fElems.count() == 0 || !fElems.top()->fHasChildren);
1.281 + SkString str(value, length);
1.282 + fParser.addAttribute(name, str.c_str());
1.283 +}
1.284 +
1.285 +void SkXMLParserWriter::onEndElement()
1.286 +{
1.287 + Elem* elem = this->getEnd();
1.288 + fParser.endElement(elem->fName.c_str());
1.289 + this->doEnd(elem);
1.290 +}
1.291 +
1.292 +void SkXMLParserWriter::onStartElementLen(const char name[], size_t length)
1.293 +{
1.294 + (void)this->doStart(name, length);
1.295 + SkString str(name, length);
1.296 + fParser.startElement(str.c_str());
1.297 +}
1.298 +
1.299 +
1.300 +////////////////////////////////////////////////////////////////////////////////////////
1.301 +////////////////////////////////////////////////////////////////////////////////////////
1.302 +
1.303 +#ifdef SK_DEBUG
1.304 +
1.305 +void SkXMLStreamWriter::UnitTest()
1.306 +{
1.307 +#ifdef SK_SUPPORT_UNITTEST
1.308 + SkDebugWStream s;
1.309 + SkXMLStreamWriter w(&s);
1.310 +
1.311 + w.startElement("elem0");
1.312 + w.addAttribute("hello", "world");
1.313 + w.addS32Attribute("dec", 42);
1.314 + w.addHexAttribute("hex", 0x42, 3);
1.315 + w.addScalarAttribute("scalar", -4.2f);
1.316 + w.startElement("elem1");
1.317 + w.endElement();
1.318 + w.startElement("elem1");
1.319 + w.addAttribute("name", "value");
1.320 + w.endElement();
1.321 + w.startElement("elem1");
1.322 + w.startElement("elem2");
1.323 + w.startElement("elem3");
1.324 + w.addAttribute("name", "value");
1.325 + w.endElement();
1.326 + w.endElement();
1.327 + w.startElement("elem2");
1.328 + w.endElement();
1.329 + w.endElement();
1.330 + w.endElement();
1.331 +#endif
1.332 +}
1.333 +
1.334 +#endif
