Add svg conversion.

src/web/CMakeLists.txt

@@ -29,10 +29,12 @@ list(APPEND web_LIB_INCLUDES
     html/elements/HtmlParagraphElement.cpp
     svg/SvgDocument.h
     svg/SvgWriter.h
+	svg/SvgReader.h
     svg/SvgShapeElement.h
     svg/SvgElement.h
     svg/elements/SvgShapeElements.h
     svg/SvgDocument.cpp
+	svg/SvgReader.cpp
     svg/SvgWriter.cpp
     svg/SvgShapeElement.cpp
     svg/SvgElement.cpp

src/web/html/elements/HtmlParagraphElement.cpp

@@ -10,7 +10,7 @@ std::string HtmlParagraphElement::toString(unsigned depth, bool keepInline) cons
         content += " " + attribute->getName() + "=\"" + attribute->getValue() + "\"";
     }
 
-    const auto num_children = getNumChildren();
+    const auto num_children = mChildren.size();
     if (num_children == 0 && getText().empty())
     {
         content += "/>\n";
@@ -30,9 +30,9 @@ std::string HtmlParagraphElement::toString(unsigned depth, bool keepInline) cons
     {
         content += "\n";
     }
-    for (std::size_t idx=0; idx< getNumChildren(); idx++)
+
+    for(const auto& child : mChildren)
     {
-        auto child = getChild(idx);
         content += child->toString(depth+1, true);
     }
     if (num_children>0)

src/web/svg/SvgDocument.cpp

@@ -1,6 +1,7 @@
 #include "SvgDocument.h"
 
 #include "XmlAttribute.h"
+#include "StringUtils.h"
 
 #include <sstream>
 
@@ -19,10 +20,39 @@ SvgDocument::SvgDocument()
 
 void SvgDocument::setViewBox(double x, double y, double w, double h)
 {
-    auto viewbox = std::make_unique<XmlAttribute>("viewBox");
     std::stringstream sstr;
     sstr << x << " " << y << " " << w << " " << h;
-    viewbox->setValue(sstr.str());
+    setViewBox(sstr.str());
+}
 
+void SvgDocument::setViewBox(const std::string& data)
+{
+    auto viewbox = std::make_unique<XmlAttribute>("viewBox");
+    viewbox->setValue(data);
     getRoot()->addAttribute(std::move(viewbox));
 }
+
+SvgDocument::ViewBox SvgDocument::getViewBox() const
+{
+    ViewBox viewBox;
+
+    if (!getRoot())
+    {
+        return viewBox;
+    }
+
+    if (auto vb_attr = getRoot()->getAttribute("viewBox"); vb_attr)
+    {
+        auto entries = StringUtils::split(vb_attr->getValue());
+        if (entries.size() != 4)
+        {
+            return viewBox;
+        }
+
+        viewBox.mX = std::stod(entries[0]);
+        viewBox.mY = std::stod(entries[1]);
+        viewBox.mW = std::stod(entries[2]);
+        viewBox.mH = std::stod(entries[3]);
+    }
+    return viewBox;
+}

src/web/svg/SvgDocument.h

@@ -5,6 +5,18 @@
 class SvgDocument : public XmlDocument
 {
 public:
+    struct ViewBox
+    {
+        double mX{ 0 };
+        double mY{ 0 };
+        double mW{ 0 };
+        double mH{ 0 };
+    };
+
     SvgDocument();
+
+    ViewBox getViewBox() const;
+
+    void setViewBox(const std::string& data);
     void setViewBox(double x, double y, double w, double h);
 };

src/web/svg/SvgReader.cpp

@@ -0,0 +1,76 @@
+#include "SvgReader.h"
+
+#include "File.h"
+#include "XmlParser.h"
+#include "XmlAttribute.h"
+
+#include "SvgShapeElements.h"
+
+#include "FileLogger.h"
+
+std::unique_ptr<SvgDocument> SvgReader::read(const Path& path) const
+{
+	auto svg_doc = std::make_unique<SvgDocument>();
+
+    File in_file(path);
+    auto lines = in_file.readLines();
+
+    XmlParser parser;
+    for (const auto& line : lines)
+    {
+        parser.processLine(line);
+    }
+
+    auto xml_doc = parser.getDocument();
+
+    if (xml_doc->getRoot() && xml_doc->getRoot()->getTagName() == "svg")
+    {
+        onRoot(xml_doc->getRoot(), svg_doc.get());
+    }
+    return svg_doc;
+}
+
+void SvgReader::onRoot(XmlElement* element, SvgDocument* doc) const
+{
+    for (const auto& attr : element->getAttributes())
+    {
+        doc->getRoot()->addAttribute(attr.first, attr.second->getValue());
+    }
+
+    for (const auto& child : element->getChildren())
+    {
+        onChild(child.get(), doc->getRoot());
+    }
+}
+
+void SvgReader::onChild(XmlElement* element, XmlElement* svg_parent) const
+{
+    std::unique_ptr<XmlElement> new_svg;
+    if (element->getTagName() == "circle")
+    {
+        new_svg = std::make_unique<SvgCircle>();
+    }
+    else if (element->getTagName() == "ellipse")
+    {
+        new_svg = std::make_unique<SvgCircle>(SvgCircle::Type::ELLIPSE);
+    }
+    else if (element->getTagName() == "rect")
+    {
+        new_svg = std::make_unique<SvgRectangle>();
+    }
+    else
+    {
+        return;
+    }
+
+    for (const auto& attr : element->getAttributes())
+    {
+        new_svg->addAttribute(attr.first, attr.second->getValue());
+    }
+
+    for (const auto& child : element->getChildren())
+    {
+       onChild(child.get(), new_svg.get());
+    }
+    svg_parent->addChild(std::move(new_svg));
+}

src/web/svg/SvgReader.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "SvgDocument.h"
+
+#include <filesystem>
+
+using Path = std::filesystem::path;
+
+class SvgElement;
+
+class SvgReader
+{
+public:
+	std::unique_ptr<SvgDocument> read(const Path& path) const;
+
+private:
+	void onRoot(XmlElement* element, SvgDocument* doc) const;
+
+	void onChild(XmlElement* element, XmlElement* svg_parent) const;
+};

src/web/svg/SvgShapeElement.cpp

@@ -1,6 +1,7 @@
 #include "SvgShapeElement.h"
 
 #include "XmlAttribute.h"
+#include "StringUtils.h"
 
 #include <sstream>
 
@@ -10,6 +11,96 @@ SvgShapeElement::SvgShapeElement(const std::string& tagName)
 
 }
 
+Transform SvgShapeElement::getTransform() const
+{
+    Transform transform;
+    const std::string translate_key = "translate";
+    const std::string scale_key = "scale";
+
+    if (auto attr = getAttribute("transform"); attr)
+    {
+        const auto val = attr->getValue();
+        std::string working_string;
+        bool in_translate = false;
+        bool in_scale = false;
+        for (auto c : val)
+        {
+            if (StringUtils::stripSurroundingWhitepsace(working_string) == translate_key)
+            {
+                in_translate = true;
+                working_string.clear();
+                continue;
+            }
+            else if (StringUtils::stripSurroundingWhitepsace(working_string) == scale_key)
+            {
+                in_scale = true;
+                working_string.clear();
+                continue;
+            }
+            else if (c == '(')
+            {
+                continue;
+            }
+            else if (c == ')')
+            {
+                if (in_translate)
+                {
+                    const auto loc = parsePoint(working_string, 0.0);
+                    transform.setLocation(loc);
+                    in_translate = false;
+                }
+                else if (in_scale)
+                {
+                    const auto loc = parsePoint(working_string, 1.0);
+                    transform.setScale(loc.getX(), loc.getY(), loc.getZ());
+                    in_scale = false;
+                }
+                working_string.clear();
+            }
+            else
+            {
+                working_string += c;
+            }
+        }
+    }
+    return transform;
+}
+
+std::string SvgShapeElement::getLabelledContent(const std::string& key, const std::string& content) const
+{
+    return content.substr(key.size(), content.size() - key.size() - 2);
+}
+
+Point SvgShapeElement::parsePoint(const std::string& pointString, double defaultVal) const
+{
+    double x = defaultVal;
+    double y = defaultVal;
+    double z = defaultVal;
+
+    const auto split = StringUtils::split(pointString);
+    for (std::size_t idx = 0; idx < split.size(); idx++)
+    {
+        if (idx == 0)
+        {
+            x = std::stod(split[idx]);
+        }
+        else if (idx == 1)
+        {
+            y = std::stod(split[idx]);
+        }
+        else if (idx == 2)
+        {
+            z = std::stod(split[idx]);
+        }
+    }
+    return { x, y, z };
+}
+
+bool SvgShapeElement::hasTransform() const
+{
+    return bool(getAttribute("transform"));
+}
+
 void SvgShapeElement::setNoFill()
 {
     auto attr = std::make_unique<XmlAttribute>("fill");

src/web/svg/SvgShapeElement.h

@@ -2,12 +2,17 @@
 
 #include "SvgElement.h"
 #include "Color.h"
+#include "Transform.h"
 
 class SvgShapeElement : public SvgElement
 {
 public:
     SvgShapeElement(const std::string& tagName);
 
+    Transform getTransform() const;
+    
+    bool hasTransform() const;
+
     void setFill(const Color& fill);
 
     void setNoFill();
@@ -17,4 +22,8 @@ public:
     void setStrokeColor(const Color& stroke);
 
     void setNoStroke();
+
+private:
+    std::string getLabelledContent(const std::string& key, const std::string& content) const;
+    Point parsePoint(const std::string& pointString, double defaultVal = 0.0) const;
 };

src/web/svg/SvgWriter.cpp

@@ -1,8 +1,9 @@
 #include "SvgWriter.h"
 
 #include "SvgDocument.h"
+#include "File.h"
 
-std::string SvgWriter::toString(SvgDocument* document)
+std::string SvgWriter::toString(SvgDocument* document) const
 {
     std::string content = "";
     if (auto root = document->getRoot())
@@ -11,3 +12,9 @@ std::string SvgWriter::toString(SvgDocument* document)
     }
     return content;
 }
+
+void SvgWriter::toFile(const Path& path, SvgDocument* document) const
+{
+    File out_file(path);
+    out_file.writeText(toString(document));
+}

src/web/svg/SvgWriter.h

@@ -1,11 +1,16 @@
 #pragma once
 
 #include <string>
+#include <filesystem>
+
+using Path = std::filesystem::path;
 
 class SvgDocument;
 
 class SvgWriter
 {
 public:
-    std::string toString(SvgDocument* document);
+    std::string toString(SvgDocument* document) const;
+
+    void toFile(const Path& path, SvgDocument* document) const;
 };

src/web/svg/elements/SvgShapeElements.cpp

@@ -9,6 +9,50 @@ SvgCircle::SvgCircle(Type type)
 
 }
 
+Point SvgCircle::getLocation() const
+{
+    double cx = 0.0;
+    double cy = 0.0;
+    if (auto attr = getAttribute("cx"); attr)
+    {
+        cx = std::stod(attr->getValue());
+    }
+    if (auto attr = getAttribute("cy"); attr)
+    {
+        cy = std::stod(attr->getValue());
+    }
+    return { cx, cy };
+}
+
+double SvgCircle::getRadius() const
+{
+    double radius = 1.0;
+    if (auto attr = getAttribute("rx"); attr)
+    {
+        radius = std::stod(attr->getValue());
+    }
+    else if (auto attr = getAttribute("r"); attr)
+    {
+        radius = std::stod(attr->getValue());
+    }
+    return radius;
+}
+
+SvgCircle::Type SvgCircle::getType() const
+{
+    return mType;
+}
+
+double SvgCircle::getMinorRadius() const
+{
+    double radius = 0.0;
+    if (auto attr = getAttribute("ry"); attr)
+    {
+        radius = std::stod(attr->getValue());
+    }
+    return radius;
+}
+
 void SvgCircle::setLocation(const Point& loc)
 {
     auto cx = std::make_unique<XmlAttribute>("cx");

src/web/svg/elements/SvgShapeElements.h

@@ -16,6 +16,14 @@ public:
 
     SvgCircle(Type type = Type::REGULAR);
 
+    Point getLocation() const;
+
+    double getRadius() const;
+
+    Type getType() const;
+
+    double getMinorRadius() const;
+
     void setLocation(const Point& loc);
 
     void setRadius(double rad);

src/web/xml/XmlParser.cpp

@@ -193,6 +193,7 @@ void XmlParser::onRightBracket()
         case LS::Await_Attribute_Name:
         case LS::Await_Attribute_Name_End:
         case LS::Await_Attribute_Value:
+        case LS::Await_Tag_Inline_Close:
         {
             onTagClose();
             break;
@@ -220,13 +221,21 @@ void XmlParser::onQuestionMark()
 
 void XmlParser::onForwardSlash()
 {
-    if(mLineState == LS::Await_Tag_Follower)
+    if (mLineState == LS::Await_Tag_Follower)
     {
-        if(mDocumentState == DS::Await_Element || mDocumentState == DS::Build_Element)
+        if (mDocumentState == DS::Await_Element || mDocumentState == DS::Build_Element)
         {
             mDocumentState = DS::Close_Element;
         }
     }
+    else if(mLineState == LS::Await_Attribute_Name)
+    {
+        mLineState = LS::Await_Tag_Inline_Close;
+    }
+    else
+    {
+        onNonAlphaNumeric(StringUtils::FORWARD_SLASH);
+    }
 }
 
 void XmlParser::onEquals()
@@ -270,6 +279,13 @@ void XmlParser::onTagClose()
         {
             onTagNameEnd();
         }
+        else if (mLineState == LS::Await_Tag_Inline_Close)
+        {
+            if (!mWorkingElements.empty())
+            {
+                mWorkingElements.pop();
+            }
+        }
         onElementTagEnd();
     }
     else if(mDocumentState == DS::Close_Element)

src/web/xml/XmlParser.h

@@ -27,6 +27,7 @@ public:
         Await_Tag_Follower,
         Await_Tag_Name,
         Await_Tag_Name_End,
+        Await_Tag_Inline_Close,
         Await_Attribute_Name,
         Await_Attribute_Name_End,
         Await_Attribute_Value,
@@ -82,8 +83,6 @@ private:
 
     void onAttributeValueEnd();
 
-    void onPrologId();
-
     void onStartProlog();
 
     void onFinishProlog();

src/web/xml/xml-elements/XmlElement.cpp

@@ -34,6 +34,13 @@ void XmlElement::addAttribute(XmlAttributePtr attribute)
     mAttributes[attribute->getName()] = std::move(attribute);
 }
 
+void XmlElement::addAttribute(const std::string& name, const std::string& value)
+{
+    auto attr = std::make_unique<XmlAttribute>(name);
+    attr->setValue(value);
+    addAttribute(std::move(attr));
+}
+
 const std::string& XmlElement::getTagName() const
 {
     return mTagName;
@@ -62,6 +69,11 @@ XmlElement* XmlElement::getFirstChildWithTagName(const std::string& tag)
     return nullptr;
 }
 
+bool XmlElement::hasAttribute(const std::string& attribute) const
+{
+    return (bool)(getAttribute(attribute));
+}
+
 XmlAttribute* XmlElement::getAttribute(const std::string& attributeName) const
 {
     if (auto iter = mAttributes.find(attributeName); iter != mAttributes.end())
@@ -76,14 +88,9 @@ const std::unordered_map<std::string, XmlAttributePtr>& XmlElement::getAttribute
     return mAttributes;
 }
 
-std::size_t XmlElement::getNumChildren() const
+const std::vector<std::unique_ptr<XmlElement> >& XmlElement::getChildren() const
 {
-    return mChildren.size();
-}
-
-XmlElement* XmlElement::getChild(std::size_t index) const
-{
-    return mChildren[index].get();
+    return mChildren;
 }
 
 std::string XmlElement::toString(unsigned depth, bool keepInline) const
@@ -98,7 +105,7 @@ std::string XmlElement::toString(unsigned depth, bool keepInline) const
         content += " " + attribute->getName() + "=\"" + attribute->getValue() + "\"";
     }
 
-    const auto num_children = getNumChildren();
+    const auto num_children = mChildren.size();
     if (num_children == 0 && getText().empty())
     {
         content += "/>" + line_ending;
@@ -118,9 +125,9 @@ std::string XmlElement::toString(unsigned depth, bool keepInline) const
     {
         content += line_ending;
     }
-    for (std::size_t idx=0; idx< getNumChildren(); idx++)
+
+    for(const auto& child : mChildren)
     {
-        auto child = getChild(idx);
         content += child->toString(depth+1, keepInline);
     }
     if (num_children>0)

src/web/xml/xml-elements/XmlElement.h

@@ -17,15 +17,17 @@ public:
     static std::unique_ptr<XmlElement> Create(const std::string& tagName);
 
     void addAttribute(XmlAttributePtr attribute);
+    void addAttribute(const std::string& name, const std::string& value);
     void addChild(std::unique_ptr<XmlElement> child);
 
     const std::string& getTagName() const;
     const std::string& getText() const;
+
+    bool hasAttribute(const std::string& attribute) const;
     XmlAttribute* getAttribute(const std::string& attribute) const;
     const std::unordered_map<std::string, XmlAttributePtr>& getAttributes() const;
 
-    std::size_t getNumChildren() const;
-    XmlElement* getChild(std::size_t index) const;
+    const std::vector<std::unique_ptr<XmlElement> >& getChildren() const;
 
     XmlElement* getFirstChildWithTagName(const std::string& tag);