1 files changed, 92 insertions, 0 deletions
diff --git a/dviware/dvisvgm/src/SVGCharHandler.cpp b/dviware/dvisvgm/src/SVGCharHandler.cpp
new file mode 100644
index 0000000000..3733053e4d
--- /dev/null
+++ b/dviware/dvisvgm/src/SVGCharHandler.cpp
@@ -0,0 +1,92 @@
+/*************************************************************************
+** SVGCharHandler.cpp                                                   **
+**                                                                      **
+** This file is part of dvisvgm -- a fast DVI to SVG converter          **
+** Copyright (C) 2005-2019 Martin Gieseking <martin.gieseking@uos.de>   **
+**                                                                      **
+** This program is free software; you can redistribute it and/or        **
+** modify it under the terms of the GNU General Public License as       **
+** published by the Free Software Foundation; either version 3 of       **
+** the License, or (at your option) any later version.                  **
+**                                                                      **
+** This program 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 General Public License for more details.                         **
+**                                                                      **
+** You should have received a copy of the GNU General Public License    **
+** along with this program; if not, see <http://www.gnu.org/licenses/>. **
+*************************************************************************/
+
+#include "SVGCharHandler.hpp"
+#include "utility.hpp"
+#include "XMLNode.hpp"
+
+using namespace std;
+
+
+void SVGCharHandler::setInitialContextNode (XMLElement *node) {
+	resetContextNode();
+	_initialContextNode = node;
+}
+
+
+/** Changes the context element. All following nodes will be appended to this node.
+ *  @param[in] node the new context node
+ *  @return bare pointer to the new context node or 0 if context hasn't changed */
+XMLElement* SVGCharHandler::pushContextNode (unique_ptr<XMLElement> node) {
+	if (node && (_contextNodeStack.empty() || node.get() != _contextNodeStack.top())) {
+		XMLElement *nodeptr = node.get();
+		contextNode()->append(std::move(node));
+		_contextNodeStack.push(nodeptr);
+		return nodeptr;
+	}
+	return nullptr;
+}
+
+
+void SVGCharHandler::popContextNode () {
+	if (!_contextNodeStack.empty())
+		_contextNodeStack.pop();
+}
+
+
+/** Resets the context node to the initial element node. */
+void SVGCharHandler::resetContextNode () {
+	while (!_contextNodeStack.empty())
+		_contextNodeStack.pop();
+}
+
+
+/** Creates and returns a new SVG text element.
+ *  @param[in] x current x coordinate
+ *  @param[in] y current y coordinate */
+unique_ptr<XMLElement> SVGCharTextHandler::createTextNode (double x, double y) const {
+	const Font *font = _font.get();
+	if (!font)
+		return nullptr;
+	auto textNode = util::make_unique<XMLElement>("text");
+	if (_selectFontByClass)
+		textNode->addAttribute("class", string("f")+XMLString(_fontnum));
+	else {
+		textNode->addAttribute("font-family", font->name());
+		textNode->addAttribute("font-size", XMLString(font->scaledSize()));
+		if (font->color() != Color::BLACK)
+			textNode->addAttribute("fill", font->color().svgColorString());
+	}
+	if (_vertical) {
+		textNode->addAttribute("writing-mode", "tb");
+		// align glyphs designed for horizontal layout properly
+		if (auto pf = dynamic_cast<const PhysicalFont*>(font)) {
+			if (!pf->getMetrics()->verticalLayout()) { // alphabetic text designed for horizontal layout?
+				x += pf->scaledAscent()/2.5; // move vertical baseline to the right by strikethrough offset
+				textNode->addAttribute("glyph-orientation-vertical", 90); // ensure rotation
+			}
+		}
+	}
+	textNode->addAttribute("x", x);
+	textNode->addAttribute("y", y);
+	if (!_matrix.get().isIdentity())
+		textNode->addAttribute("transform", _matrix.get().toSVG());
+	return textNode;
+}