katex

main.cpp

@@ -22,6 +22,7 @@
 #include <queue>
 
 #include <base64.h>
+#define katex_support
 
 extern "C" {
 /*
@@ -67,7 +68,6 @@ They are provided by the lyx-fonts package in fedora, and the ttf-lyx package in
 
 #include "itex2MML.h"
 #include "mtex2MML.h"
-#include "SimpleSvg.hh"
 
 namespace lex {
 extern "C" {
@@ -509,7 +509,6 @@ class builder {
     std::unordered_map<fs::path, time_t, pathHash> last_build;
     gnu_highlighter shl {};
     imtex::Imtex imtx {};
-    SimpleSVG mathRenderer{} ;
 
 
     const std::set<std::string> apply_templates_exts {"md","html", "txt", "markdown", "xml", "atom", "rss"};
@@ -558,30 +557,24 @@ class builder {
             const std::string tt {(const char *)text, (const char *)text + len};
 
 #ifdef katex_support
-            std::string mtext = dukengine.eval_katex(tt);
+            std::string mathtext = dukengine.eval_katex(tt);
 #endif
 
-            std::string mtext = imtx.get_svg_from_mtex(tt);
+//            std::string mtext = imtx.get_svg_from_mtex(tt);
 
             const unsigned char local_name[] = "math";
 
-            std::string style = "inline-math";
-            if (text[1] == '[') 
-                style = "display-math";
+ //           auto mathtext = "<img src='data:image/svg+xml;base64, " + base64_encode_mime(mtext) + "'/>";
 
+            lxb_html_element_t * ele = lxb_html_document_create_element(document, local_name, 
+                    (size_t)4, nullptr);
 
-            lxb_html_element_t * elem = lxb_html_document_create_element(document, (const unsigned char *)"img", 3, NULL);
-            auto nelem = lxb_dom_interface_element(elem);
-
-            std::string alttext = tt.substr(2, tt.length() - 4);
-
-            auto imgsrc = "data:image/svg+xml;base64, " + base64_encode_mime(mtext);
-            lxb_dom_element_set_attribute(nelem, (const unsigned char*)"alt", 3, (const unsigned char*)alttext.c_str(), alttext.length());
-            lxb_dom_element_set_attribute(nelem, (const unsigned char*)"src", 3, (const unsigned char*)imgsrc.c_str(), imgsrc.length());
-            lxb_dom_element_set_attribute(nelem, (const unsigned char*)"class", 5, (const unsigned char*)style.c_str(), style.length());
+             auto elem = lxb_dom_interface_element(ele);
 
+            lxb_dom_node_t *n = lxb_html_document_parse_fragment(document, 
+                    elem, (const unsigned char *)mathtext.c_str(), mathtext.length());
 
-            lxb_dom_node_insert_after(&element->node, lxb_dom_interface_node(nelem));
+            lxb_dom_node_insert_after(&element->node, n);
             lxb_dom_node_remove(&element->node);
         }
 

notes/math.md

@@ -35,3 +35,14 @@ curl -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/cmex10.ttf \
 source: https://github.com/gjtorikian/mathematical
 
 azip of all t3 fonts: https://mirror.aarnet.edu.au/pub/CTAN/fonts/cm/ps-type3.zip
+
+
+### Alternative to Lexbor
+
+- libtidy to convert to XHTML
+    - https://api.html-tidy.org/tidy/tidylib_api_5.8.0/libtidy_04.html
+- pugixml to edit XHTML
+    - https://pugixml.org/docs/quickstart.html
+- use katex in quickjs to render math
+
+

notes/math.sync-conflict-20210727-160813-SROMGUW.md

@@ -0,0 +1,35 @@
+
+
+Wikipedia uses mathml on top of svg with the following css:
+
+```css
+.mwe-math-mathml-a11y {
+    clip: rect(1px,1px,1px,1px);
+    overflow: hidden;
+    position: absolute;
+    width: 1px;
+    height: 1px;
+    opacity: 0;
+}
+```
+
+The mathml is before the image, with overflow hidden set and 0 opacity.  The latex is set as the SVG's alt text.
+
+Each equation is its own request.
+
+## Fonts
+
+Fonts can be downloaded this way 
+
+```sh
+curl -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/cmex10.ttf \
+     -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/cmmi10.ttf \
+     -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/cmr10.ttf \
+     -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/cmsy10.ttf \
+     -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/esint10.ttf \
+     -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/eufm10.ttf \
+     -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/msam10.ttf \
+     -LO http://mirrors.ctan.org/fonts/cm/ps-type1/bakoma/ttf/msbm10.ttf
+```
+
+source: https://github.com/gjtorikian/mathematical

notes/syntax.md

@@ -0,0 +1,5 @@
+
+
+- syntax can be generated using syntect 
+    - https://crates.io/crates/syntect
+    - Write a c interface to the rust library and call the c interface from c++.