Guppy is a Javascript-based WYSIWYG editor for mathematics whose content is stored in an XML format that makes Guppy mathematical expressions searchable, parseable, and renderable.
The content of the editor can easily be extracted in a very flexible XML format (for searching or otherwise manipulating), LaTeX (for rendering), or a plaintext format (for parsing).
A live demo can be found at https://daniel3735928559.github.io/guppy/
A stripped-down version of the demo page would look like:
<html>
<head>
<link rel="stylesheet" href="lib/katex/katex.min.css">
<script src="lib/katex/katex-modified.min.js"></script>
<script src="lib/mousetrap/mousetrap.min.js"></script>
<script type="text/javascript" src="src/guppy.js"></script>
</head>
<body>
<div id="guppy_div" style="width:400px;height:100px;"></div>
<script>
Guppy.guppy_init("src/transform.xsl","src/symbols.json");
new Guppy("guppy_div");
</script>
<button onclick="alert(Guppy.instances.guppy_div.get_content('xml'))">See XML</button>
<button onclick="alert(Guppy.instances.guppy_div.get_content('latex'))">See LaTeX</button>
<button onclick="alert(Guppy.instances.guppy_div.get_content('text'))">See ASCII</button>
</body>
</html>
-
Download the
libandsrcfolders. -
Include
src/guppy.jsafterlib/katex/katex-modified.min.js,lib/katex/katex.min.css, andlib/mousetrap/mousetrap.min.jsfiles in your page. -
Pass the paths to
src/transform.xslandsrc/symbols.jsontoGuppy.guppy_initas in the example above. This only needs to happen once per page. -
For each div that you want turned into a Guppy instance, call
new Guppy()passing in as the first argument either the Element object for that div or its ID.
The editor has many of the usual keyboard text-editing features: Navigation with the arrow keys, backspace, home, end, selection with shift-left/right, mod-z/x/c/v for undo, cut, copy, paste (respectively). Using the mouse to navigate and select is also supported.
If you type the name of a mathematical object such as sqrt, the
editor will automatically replace that entered text with the
corresponding object. The list of symbols supported by default is
documented in index.html (or just see the demo page). Further symbols
can be added by modifying symbols.json.
- The Javascript API for controlling the editor
- The JSON specification used to describe available symbols
- The XML format used to represent expressions
- Editor internals
The tests can be run by opening /test/test.html in a browser, for example, by going to https://daniel3735928559.github.io/guppy/test/test.html
Guppy is licensed under the MIT License.