Task 703: .SVG File Format
Task 703: .SVG File Format
The SVG (Scalable Vector Graphics) file format is defined by the World Wide Web Consortium (W3C) in its official specifications. The primary specifications are SVG 2 and SVG 1.1, which describe SVG as an XML-based markup language for two-dimensional vector graphics, supporting interactivity, animation, and scalability without quality loss.
Based on the specifications, the following is a list of key properties intrinsic to the SVG file format's structure (focusing on the XML header declaration and root <svg> element attributes that define the document's core format, namespace, viewport, and rendering behavior). These are encoded within the file itself and are essential for parsing and rendering:
- XML Version: The version of XML used (typically "1.0").
- XML Encoding: The character encoding (e.g., "UTF-8").
- XML Standalone: Indicates if external dependencies are needed ("yes" or "no").
- SVG Namespace (xmlns): The default namespace URI for SVG elements (http://www.w3.org/2000/svg).
- XLink Namespace (xmlns:xlink): Optional namespace for linking (http://www.w3.org/1999/xlink).
- SVG Version: The SVG specification version (e.g., "1.1" or "2").
- Base Profile: Deprecated; minimum language profile required (e.g., "full", "basic", "tiny").
- Width: The viewport width (length, percentage, or "auto").
- Height: The viewport height (length, percentage, or "auto").
- X: The x-coordinate for positioning (length or percentage; no effect on outermost root).
- Y: The y-coordinate for positioning (length or percentage; no effect on outermost root).
- ViewBox: Viewport coordinates for scaling (list of four numbers: min-x min-y width height).
- PreserveAspectRatio: Aspect ratio handling (e.g., "xMidYMid meet").
- ZoomAndPan: Controls zooming and panning ("disable" or "magnify").
Two direct download links for sample .SVG files:
- https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/car.svg
- https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/AJ_Digital_Camera.svg
Below is embeddable HTML/JavaScript code for a Ghost blog post (or any HTML context). It creates a drag-and-drop area where a user can drop an .SVG file. The script reads the file as text, extracts the properties from the list above (parsing the XML declaration manually and using DOMParser for the root <svg> attributes), and dumps them to the screen in a preformatted block. Include this in a Ghost post via the HTML card.
Drag and Drop SVG File to Dump Properties
Drop .SVG file here
- Below is a Python class for handling .SVG files. It opens the file, decodes/parses it (using
xml.etree.ElementTreefor the XML structure and manual parsing for the XML declaration), reads the properties, prints them to console, and supports writing (modifying a property and saving to a new file).
import xml.etree.ElementTree as ET
import re
class SVGHandler:
def __init__(self):
self.properties = {}
self.root = None
self.text = None
def open(self, filename):
with open(filename, 'r', encoding='utf-8') as f:
self.text = f.read()
self._parse_declaration()
self.root = ET.fromstring(self.text)
if self.root.tag.lower() != '{http://www.w3.org/2000/svg}svg':
# Adjust for no namespace prefix
self.root = ET.fromstring(self.text.replace('<svg', '<svg xmlns="http://www.w3.org/2000/svg"'))
self._extract_properties()
def _parse_declaration(self):
xml_decl_match = re.search(r'<\?xml\s+[^?]*\?>', self.text, re.IGNORECASE)
if xml_decl_match:
decl = xml_decl_match.group(0)
version_match = re.search(r'version\s*=\s*["\']([^"\']+)["\']', decl, re.IGNORECASE)
if version_match:
self.properties['XML Version'] = version_match.group(1)
encoding_match = re.search(r'encoding\s*=\s*["\']([^"\']+)["\']', decl, re.IGNORECASE)
if encoding_match:
self.properties['XML Encoding'] = encoding_match.group(1)
standalone_match = re.search(r'standalone\s*=\s*["\']([^"\']+)["\']', decl, re.IGNORECASE)
if standalone_match:
self.properties['XML Standalone'] = standalone_match.group(1)
def _extract_properties(self):
ns = {'svg': 'http://www.w3.org/2000/svg'}
self.properties['SVG Namespace (xmlns)'] = self.root.get('xmlns', 'Implicit')
self.properties['XLink Namespace (xmlns:xlink)'] = self.root.get('{http://www.w3.org/2000/xmlns/}xlink', 'Not present')
self.properties['SVG Version'] = self.root.get('version', 'Not specified')
self.properties['Base Profile'] = self.root.get('baseProfile', 'Not specified')
self.properties['Width'] = self.root.get('width', 'auto')
self.properties['Height'] = self.root.get('height', 'auto')
self.properties['X'] = self.root.get('x', '0')
self.properties['Y'] = self.root.get('y', '0')
self.properties['ViewBox'] = self.root.get('viewBox', 'none')
self.properties['PreserveAspectRatio'] = self.root.get('preserveAspectRatio', 'xMidYMid meet')
self.properties['ZoomAndPan'] = self.root.get('zoomAndPan', 'magnify')
def print_properties(self):
for key, value in self.properties.items():
print(f"{key}: {value or 'Not found'}")
def set_property(self, key, value):
if key in ['XML Version', 'XML Encoding', 'XML Standalone']:
# Modify declaration; rebuild text
self.text = re.sub(r'<\?xml\s+[^?]*\?>', self._build_declaration(), self.text)
else:
attr_map = {
'SVG Namespace (xmlns)': 'xmlns',
'XLink Namespace (xmlns:xlink)': '{http://www.w3.org/2000/xmlns/}xlink',
'SVG Version': 'version',
'Base Profile': 'baseProfile',
'Width': 'width',
'Height': 'height',
'X': 'x',
'Y': 'y',
'ViewBox': 'viewBox',
'PreserveAspectRatio': 'preserveAspectRatio',
'ZoomAndPan': 'zoomAndPan'
}
if key in attr_map:
self.root.set(attr_map[key], value)
self.properties[key] = value
def _build_declaration(self):
parts = []
if 'XML Version' in self.properties:
parts.append(f'version="{self.properties["XML Version"]}"')
if 'XML Encoding' in self.properties:
parts.append(f'encoding="{self.properties["XML Encoding"]}"')
if 'XML Standalone' in self.properties:
parts.append(f'standalone="{self.properties["XML Standalone"]}"')
return '<?xml ' + ' '.join(parts) + '?>'
def save(self, filename):
tree = ET.ElementTree(self.root)
with open(filename, 'wb') as f:
f.write(ET.tostring(tree.getroot(), encoding='utf-8', method='xml'))
# Example usage:
# handler = SVGHandler()
# handler.open('example.svg')
# handler.print_properties()
# handler.set_property('Width', '500')
# handler.save('modified.svg')
- Below is a Java class for handling .SVG files. It opens the file, decodes/parses it (using
DocumentBuilderfor XML and manual parsing for the declaration), reads the properties, prints them to console, and supports writing (modifying a property and saving to a new file).
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
public class SVGHandler {
private Map<String, String> properties = new HashMap<>();
private Document doc;
private String text;
public void open(String filename) throws Exception {
BufferedReader reader = new BufferedReader(new FileReader(filename));
StringBuilder sb = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
sb.append(line).append("\n");
}
text = sb.toString();
reader.close();
parseDeclaration();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
DocumentBuilder builder = factory.newDocumentBuilder();
doc = builder.parse(new ByteArrayInputStream(text.getBytes("UTF-8")));
Element root = doc.getDocumentElement();
if (!root.getTagName().equalsIgnoreCase("svg")) {
throw new IllegalArgumentException("Not a valid SVG file");
}
extractProperties(root);
}
private void parseDeclaration() {
Pattern xmlDeclPattern = Pattern.compile("<\\?xml\\s+[^?]*\\?>", Pattern.CASE_INSENSITIVE);
Matcher matcher = xmlDeclPattern.matcher(text);
if (matcher.find()) {
String decl = matcher.group(0);
Pattern versionPattern = Pattern.compile("version\\s*=\\s*[\"']([^\"']+)[\"']", Pattern.CASE_INSENSITIVE);
Matcher versionMatcher = versionPattern.matcher(decl);
if (versionMatcher.find()) properties.put("XML Version", versionMatcher.group(1));
Pattern encodingPattern = Pattern.compile("encoding\\s*=\\s*[\"']([^\"']+)[\"']", Pattern.CASE_INSENSITIVE);
Matcher encodingMatcher = encodingPattern.matcher(decl);
if (encodingMatcher.find()) properties.put("XML Encoding", encodingMatcher.group(1));
Pattern standalonePattern = Pattern.compile("standalone\\s*=\\s*[\"']([^\"']+)[\"']", Pattern.CASE_INSENSITIVE);
Matcher standaloneMatcher = standalonePattern.matcher(decl);
if (standaloneMatcher.find()) properties.put("XML Standalone", standaloneMatcher.group(1));
}
}
private void extractProperties(Element root) {
properties.put("SVG Namespace (xmlns)", root.getAttribute("xmlns") != null ? root.getAttribute("xmlns") : "Implicit");
properties.put("XLink Namespace (xmlns:xlink)", root.getAttributeNS("http://www.w3.org/2000/xmlns/", "xlink") != null ? root.getAttributeNS("http://www.w3.org/2000/xmlns/", "xlink") : "Not present");
properties.put("SVG Version", root.getAttribute("version") != null ? root.getAttribute("version") : "Not specified");
properties.put("Base Profile", root.getAttribute("baseProfile") != null ? root.getAttribute("baseProfile") : "Not specified");
properties.put("Width", root.getAttribute("width") != null ? root.getAttribute("width") : "auto");
properties.put("Height", root.getAttribute("height") != null ? root.getAttribute("height") : "auto");
properties.put("X", root.getAttribute("x") != null ? root.getAttribute("x") : "0");
properties.put("Y", root.getAttribute("y") != null ? root.getAttribute("y") : "0");
properties.put("ViewBox", root.getAttribute("viewBox") != null ? root.getAttribute("viewBox") : "none");
properties.put("PreserveAspectRatio", root.getAttribute("preserveAspectRatio") != null ? root.getAttribute("preserveAspectRatio") : "xMidYMid meet");
properties.put("ZoomAndPan", root.getAttribute("zoomAndPan") != null ? root.getAttribute("zoomAndPan") : "magnify");
}
public void printProperties() {
for (Map.Entry<String, String> entry : properties.entrySet()) {
System.out.println(entry.getKey() + ": " + (entry.getValue() != null ? entry.getValue() : "Not found"));
}
}
public void setProperty(String key, String value) throws Exception {
Element root = doc.getDocumentElement();
Map<String, String> attrMap = new HashMap<>();
attrMap.put("SVG Namespace (xmlns)", "xmlns");
attrMap.put("XLink Namespace (xmlns:xlink)", "xlink");
attrMap.put("SVG Version", "version");
attrMap.put("Base Profile", "baseProfile");
attrMap.put("Width", "width");
attrMap.put("Height", "height");
attrMap.put("X", "x");
attrMap.put("Y", "y");
attrMap.put("ViewBox", "viewBox");
attrMap.put("PreserveAspectRatio", "preserveAspectRatio");
attrMap.put("ZoomAndPan", "zoomAndPan");
if (attrMap.containsKey(key)) {
if (key.equals("XLink Namespace (xmlns:xlink)")) {
root.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:xlink", value);
} else {
root.setAttribute(attrMap.get(key), value);
}
properties.put(key, value);
} else if (key.startsWith("XML ")) {
// Rebuild text for declaration changes
text = text.replaceAll("<\\?xml\\s+[^?]*\\?>", buildDeclaration());
openFromText(text); // Reparse
}
}
private String buildDeclaration() {
StringBuilder decl = new StringBuilder("<?xml");
if (properties.containsKey("XML Version")) decl.append(" version=\"").append(properties.get("XML Version")).append("\"");
if (properties.containsKey("XML Encoding")) decl.append(" encoding=\"").append(properties.get("XML Encoding")).append("\"");
if (properties.containsKey("XML Standalone")) decl.append(" standalone=\"").append(properties.get("XML Standalone")).append("\"");
decl.append("?>");
return decl.toString();
}
private void openFromText(String newText) throws Exception {
text = newText;
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
DocumentBuilder builder = factory.newDocumentBuilder();
doc = builder.parse(new ByteArrayInputStream(text.getBytes("UTF-8")));
extractProperties(doc.getDocumentElement());
}
public void save(String filename) throws Exception {
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File(filename));
transformer.transform(source, result);
}
// Example usage:
// public static void main(String[] args) throws Exception {
// SVGHandler handler = new SVGHandler();
// handler.open("example.svg");
// handler.printProperties();
// handler.setProperty("Width", "500");
// handler.save("modified.svg");
// }
}
- Below is a JavaScript class for handling .SVG files (browser context; use FileReader). It opens the file, decodes/parses it (manual for declaration, DOMParser for root), reads the properties, prints them to console, and supports writing (modifying a property and saving via Blob/download).
class SVGHandler {
constructor() {
this.properties = {};
this.doc = null;
this.text = null;
}
open(file) {
return new Promise((resolve, reject) => {
const reader = new FileReader();
reader.onload = (event) => {
this.text = event.target.result;
this.parseDeclaration();
const parser = new DOMParser();
this.doc = parser.parseFromString(this.text, 'image/svg+xml');
const root = this.doc.documentElement;
if (root.tagName.toLowerCase() !== 'svg') {
reject('Not a valid SVG file');
}
this.extractProperties(root);
resolve();
};
reader.readAsText(file);
});
}
parseDeclaration() {
const xmlDeclMatch = this.text.match(/<\?xml\s+[^?]*\?>/i);
if (xmlDeclMatch) {
const decl = xmlDeclMatch[0];
const versionMatch = decl.match(/version\s*=\s*["']([^"']+)["']/i);
if (versionMatch) this.properties['XML Version'] = versionMatch[1];
const encodingMatch = decl.match(/encoding\s*=\s*["']([^"']+)["']/i);
if (encodingMatch) this.properties['XML Encoding'] = encodingMatch[1];
const standaloneMatch = decl.match(/standalone\s*=\s*["']([^"']+)["']/i);
if (standaloneMatch) this.properties['XML Standalone'] = standaloneMatch[1];
}
}
extractProperties(root) {
this.properties['SVG Namespace (xmlns)'] = root.getAttribute('xmlns') || 'Implicit';
this.properties['XLink Namespace (xmlns:xlink)'] = root.getAttribute('xmlns:xlink') || 'Not present';
this.properties['SVG Version'] = root.getAttribute('version') || 'Not specified';
this.properties['Base Profile'] = root.getAttribute('baseProfile') || 'Not specified';
this.properties['Width'] = root.getAttribute('width') || 'auto';
this.properties['Height'] = root.getAttribute('height') || 'auto';
this.properties['X'] = root.getAttribute('x') || '0';
this.properties['Y'] = root.getAttribute('y') || '0';
this.properties['ViewBox'] = root.getAttribute('viewBox') || 'none';
this.properties['PreserveAspectRatio'] = root.getAttribute('preserveAspectRatio') || 'xMidYMid meet';
this.properties['ZoomAndPan'] = root.getAttribute('zoomAndPan') || 'magnify';
}
printProperties() {
for (const [key, value] of Object.entries(this.properties)) {
console.log(`${key}: ${value || 'Not found'}`);
}
}
setProperty(key, value) {
const root = this.doc.documentElement;
const attrMap = {
'SVG Namespace (xmlns)': 'xmlns',
'XLink Namespace (xmlns:xlink)': 'xmlns:xlink',
'SVG Version': 'version',
'Base Profile': 'baseProfile',
'Width': 'width',
'Height': 'height',
'X': 'x',
'Y': 'y',
'ViewBox': 'viewBox',
'PreserveAspectRatio': 'preserveAspectRatio',
'ZoomAndPan': 'zoomAndPan'
};
if (attrMap[key]) {
root.setAttribute(attrMap[key], value);
this.properties[key] = value;
} else if (key.startsWith('XML ')) {
// Rebuild declaration in text
this.text = this.text.replace(/<\?xml\s+[^?]*\?>/i, this.buildDeclaration());
// Reparse
const parser = new DOMParser();
this.doc = parser.parseFromString(this.text, 'image/svg+xml');
this.extractProperties(this.doc.documentElement);
}
}
buildDeclaration() {
let decl = '<?xml';
if (this.properties['XML Version']) decl += ` version="${this.properties['XML Version']}"`;
if (this.properties['XML Encoding']) decl += ` encoding="${this.properties['XML Encoding']}"`;
if (this.properties['XML Standalone']) decl += ` standalone="${this.properties['XML Standalone']}"`;
decl += '?>';
return decl;
}
save(filename) {
const serializer = new XMLSerializer();
const xmlStr = serializer.serializeToString(this.doc);
const blob = new Blob([xmlStr], { type: 'image/svg+xml' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = filename;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
URL.revokeObjectURL(url);
}
}
// Example usage:
// const handler = new SVGHandler();
// const input = document.createElement('input');
// input.type = 'file';
// input.onchange = async (e) => {
// await handler.open(e.target.files[0]);
// handler.printProperties();
// handler.setProperty('Width', '500');
// handler.save('modified.svg');
// };
// document.body.appendChild(input);
- Below is a C++ class for handling .SVG files (using standard libraries only; manual string parsing for simplicity, as no built-in XML parser). It opens the file, decodes/parses it (string searches for declaration and attributes), reads the properties, prints them to console, and supports writing (modifying a property and saving to a new file). Note: This is a basic parser and may not handle all edge cases.
#include <iostream>
#include <fstream>
#include <string>
#include <map>
#include <regex>
class SVGHandler {
private:
std::map<std::string, std::string> properties;
std::string text;
void parseDeclaration() {
std::regex xmlDeclRegex(R"(<\?xml\s+[^?]*\?>)", std::regex::icase);
std::smatch match;
if (std::regex_search(text, match, xmlDeclRegex)) {
std::string decl = match[0];
std::regex versionRegex(R"(version\s*=\s*["']([^"']+)["'])", std::regex::icase);
std::smatch versionMatch;
if (std::regex_search(decl, versionMatch, versionRegex)) {
properties["XML Version"] = versionMatch[1];
}
std::regex encodingRegex(R"(encoding\s*=\s*["']([^"']+)["'])", std::regex::icase);
std::smatch encodingMatch;
if (std::regex_search(decl, encodingMatch, encodingRegex)) {
properties["XML Encoding"] = encodingMatch[1];
}
std::regex standaloneRegex(R"(standalone\s*=\s*["']([^"']+)["'])", std::regex::icase);
std::smatch standaloneMatch;
if (std::regex_search(decl, standaloneMatch, standaloneRegex)) {
properties["XML Standalone"] = standaloneMatch[1];
}
}
}
void extractProperties() {
size_t svgStart = text.find("<svg");
if (svgStart == std::string::npos) return;
size_t svgEnd = text.find(">", svgStart);
if (svgEnd == std::string::npos) return;
std::string svgTag = text.substr(svgStart, svgEnd - svgStart + 1);
std::map<std::string, std::string> attrDefaults = {
{"xmlns", "Implicit"},
{"xmlns:xlink", "Not present"},
{"version", "Not specified"},
{"baseProfile", "Not specified"},
{"width", "auto"},
{"height", "auto"},
{"x", "0"},
{"y", "0"},
{"viewBox", "none"},
{"preserveAspectRatio", "xMidYMid meet"},
{"zoomAndPan", "magnify"}
};
std::regex attrRegex(R"(\s+([^\s=]+)\s*=\s*["']([^"']*)["'])");
auto words_begin = std::sregex_iterator(svgTag.begin(), svgTag.end(), attrRegex);
auto words_end = std::sregex_iterator();
for (std::sregex_iterator i = words_begin; i != words_end; ++i) {
std::smatch m = *i;
std::string key = m[1];
std::string value = m[2];
if (key == "xmlns") properties["SVG Namespace (xmlns)"] = value;
else if (key == "xmlns:xlink") properties["XLink Namespace (xmlns:xlink)"] = value;
else if (key == "version") properties["SVG Version"] = value;
else if (key == "baseProfile") properties["Base Profile"] = value;
else if (key == "width") properties["Width"] = value;
else if (key == "height") properties["Height"] = value;
else if (key == "x") properties["X"] = value;
else if (key == "y") properties["Y"] = value;
else if (key == "viewBox") properties["ViewBox"] = value;
else if (key == "preserveAspectRatio") properties["PreserveAspectRatio"] = value;
else if (key == "zoomAndPan") properties["ZoomAndPan"] = value;
}
// Apply defaults if not found
if (properties.find("SVG Namespace (xmlns)") == properties.end()) properties["SVG Namespace (xmlns)"] = attrDefaults["xmlns"];
if (properties.find("XLink Namespace (xmlns:xlink)") == properties.end()) properties["XLink Namespace (xmlns:xlink)"] = attrDefaults["xmlns:xlink"];
if (properties.find("SVG Version") == properties.end()) properties["SVG Version"] = attrDefaults["version"];
if (properties.find("Base Profile") == properties.end()) properties["Base Profile"] = attrDefaults["baseProfile"];
if (properties.find("Width") == properties.end()) properties["Width"] = attrDefaults["width"];
if (properties.find("Height") == properties.end()) properties["Height"] = attrDefaults["height"];
if (properties.find("X") == properties.end()) properties["X"] = attrDefaults["x"];
if (properties.find("Y") == properties.end()) properties["Y"] = attrDefaults["y"];
if (properties.find("ViewBox") == properties.end()) properties["ViewBox"] = attrDefaults["viewBox"];
if (properties.find("PreserveAspectRatio") == properties.end()) properties["PreserveAspectRatio"] = attrDefaults["preserveAspectRatio"];
if (properties.find("ZoomAndPan") == properties.end()) properties["ZoomAndPan"] = attrDefaults["zoomAndPan"];
}
public:
void open(const std::string& filename) {
std::ifstream file(filename);
if (!file) {
std::cerr << "Failed to open file" << std::endl;
return;
}
std::string line;
text.clear();
while (std::getline(file, line)) {
text += line + "\n";
}
file.close();
parseDeclaration();
extractProperties();
}
void printProperties() {
for (const auto& pair : properties) {
std::cout << pair.first << ": " << (pair.second.empty() ? "Not found" : pair.second) << std::endl;
}
}
void setProperty(const std::string& key, const std::string& value) {
std::map<std::string, std::string> attrMap = {
{"SVG Namespace (xmlns)", "xmlns"},
{"XLink Namespace (xmlns:xlink)", "xmlns:xlink"},
{"SVG Version", "version"},
{"Base Profile", "baseProfile"},
{"Width", "width"},
{"Height", "height"},
{"X", "x"},
{"Y", "y"},
{"ViewBox", "viewBox"},
{"PreserveAspectRatio", "preserveAspectRatio"},
{"ZoomAndPan", "zoomAndPan"}
};
if (attrMap.find(key) != attrMap.end()) {
std::string attr = attrMap[key];
std::regex attrRegex("\\s+" + attr + "\\s*=\\s*[\"'][^\"']*[\"']");
std::string replacement = " " + attr + "=\"" + value + "\"";
if (std::regex_search(text, attrRegex)) {
text = std::regex_replace(text, attrRegex, replacement);
} else {
// Add if not present
size_t svgStart = text.find("<svg");
size_t insertPos = text.find(" ", svgStart); // After <svg
text.insert(insertPos, replacement);
}
properties[key] = value;
} else if (key.find("XML ") == 0) {
// Rebuild declaration
std::string decl = "<?xml";
if (key == "XML Version") properties["XML Version"] = value;
if (properties.find("XML Version") != properties.end()) decl += " version=\"" + properties["XML Version"] + "\"";
if (properties.find("XML Encoding") != properties.end()) decl += " encoding=\"" + properties["XML Encoding"] + "\"";
if (properties.find("XML Standalone") != properties.end()) decl += " standalone=\"" + properties["XML Standalone"] + "\"";
decl += "?>";
std::regex xmlDeclRegex(R"(<\?xml\s+[^?]*\?>)", std::regex::icase);
text = std::regex_replace(text, xmlDeclRegex, decl);
}
}
void save(const std::string& filename) {
std::ofstream file(filename);
if (file) {
file << text;
file.close();
} else {
std::cerr << "Failed to save file" << std::endl;
}
}
};
// Example usage:
// int main() {
// SVGHandler handler;
// handler.open("example.svg");
// handler.printProperties();
// handler.setProperty("Width", "500");
// handler.save("modified.svg");
// return 0;
// }