|
|
//----------------------------------------------------------------------------
|
|
|
// Copyright (C) 2008-2012 The IPython Development Team
|
|
|
//
|
|
|
// Distributed under the terms of the BSD License. The full license is in
|
|
|
// the file COPYING, distributed as part of this software.
|
|
|
//----------------------------------------------------------------------------
|
|
|
|
|
|
//============================================================================
|
|
|
// MathJax utility functions
|
|
|
//============================================================================
|
|
|
|
|
|
IPython.namespace('IPython.mathjaxutils');
|
|
|
|
|
|
IPython.mathjaxutils = (function (IPython) {
|
|
|
|
|
|
var init = function () {
|
|
|
if (window.MathJax) {
|
|
|
// MathJax loaded
|
|
|
MathJax.Hub.Config({
|
|
|
tex2jax: {
|
|
|
inlineMath: [ ['$','$'], ["\\(","\\)"] ],
|
|
|
displayMath: [ ['$$','$$'], ["\\[","\\]"] ],
|
|
|
processEnvironments: true
|
|
|
},
|
|
|
displayAlign: 'left', // Change this to 'center' to center equations.
|
|
|
"HTML-CSS": {
|
|
|
styles: {'.MathJax_Display': {"margin": 0}}
|
|
|
}
|
|
|
});
|
|
|
MathJax.Hub.Configured();
|
|
|
} else if (window.mathjax_url != "") {
|
|
|
// Don't have MathJax, but should. Show dialog.
|
|
|
var dialog = $('<div></div>')
|
|
|
.append(
|
|
|
$("<p></p>").addClass('dialog').html(
|
|
|
"Math/LaTeX rendering will be disabled."
|
|
|
)
|
|
|
).append(
|
|
|
$("<p></p>").addClass('dialog').html(
|
|
|
"If you have administrative access to the notebook server and" +
|
|
|
" a working internet connection, you can install a local copy" +
|
|
|
" of MathJax for offline use with the following command on the server" +
|
|
|
" at a Python or IPython prompt:"
|
|
|
)
|
|
|
).append(
|
|
|
$("<pre></pre>").addClass('dialog').html(
|
|
|
">>> from IPython.external import mathjax; mathjax.install_mathjax()"
|
|
|
)
|
|
|
).append(
|
|
|
$("<p></p>").addClass('dialog').html(
|
|
|
"This will try to install MathJax into the IPython source directory."
|
|
|
)
|
|
|
).append(
|
|
|
$("<p></p>").addClass('dialog').html(
|
|
|
"If IPython is installed to a location that requires" +
|
|
|
" administrative privileges to write, you will need to make this call as" +
|
|
|
" an administrator, via 'sudo'."
|
|
|
)
|
|
|
).append(
|
|
|
$("<p></p>").addClass('dialog').html(
|
|
|
"When you start the notebook server, you can instruct it to disable MathJax support altogether:"
|
|
|
)
|
|
|
).append(
|
|
|
$("<pre></pre>").addClass('dialog').html(
|
|
|
"$ ipython notebook --no-mathjax"
|
|
|
)
|
|
|
).append(
|
|
|
$("<p></p>").addClass('dialog').html(
|
|
|
"which will prevent this dialog from appearing."
|
|
|
)
|
|
|
).dialog({
|
|
|
title: "Failed to retrieve MathJax from '" + window.mathjax_url + "'",
|
|
|
width: "70%",
|
|
|
modal: true,
|
|
|
})
|
|
|
} else {
|
|
|
// No MathJax, but none expected. No dialog.
|
|
|
};
|
|
|
};
|
|
|
|
|
|
// Some magic for deferring mathematical expressions to MathJax
|
|
|
// by hiding them from the Markdown parser.
|
|
|
// Some of the code here is adapted with permission from Davide Cervone
|
|
|
// under the terms of the Apache2 license governing the MathJax project.
|
|
|
// Other minor modifications are also due to StackExchange and are used with
|
|
|
// permission.
|
|
|
|
|
|
var inline = "$"; // the inline math delimiter
|
|
|
var blocks, start, end, last, braces; // used in searching for math
|
|
|
var math; // stores math until pagedown (Markdown parser) is done
|
|
|
|
|
|
// MATHSPLIT contains the pattern for math delimiters and special symbols
|
|
|
// needed for searching for math in the text input.
|
|
|
var MATHSPLIT = /(\$\$?|\\(?:begin|end)\{[a-z]*\*?\}|\\[\\{}$]|[{}]|(?:\n\s*)+|@@\d+@@)/i;
|
|
|
|
|
|
// The math is in blocks i through j, so
|
|
|
// collect it into one block and clear the others.
|
|
|
// Replace &, <, and > by named entities.
|
|
|
// For IE, put <br> at the ends of comments since IE removes \n.
|
|
|
// Clear the current math positions and store the index of the
|
|
|
// math, then push the math string onto the storage array.
|
|
|
// The preProcess function is called on all blocks if it has been passed in
|
|
|
var process_math = function (i, j, pre_process) {
|
|
|
var hub = MathJax.Hub;
|
|
|
var block = blocks.slice(i, j + 1).join("").replace(/&/g, "&") // use HTML entity for &
|
|
|
.replace(/</g, "<") // use HTML entity for <
|
|
|
.replace(/>/g, ">") // use HTML entity for >
|
|
|
;
|
|
|
if (hub.Browser.isMSIE) {
|
|
|
block = block.replace(/(%[^\n]*)\n/g, "$1<br/>\n")
|
|
|
}
|
|
|
while (j > i) {
|
|
|
blocks[j] = "";
|
|
|
j--;
|
|
|
}
|
|
|
blocks[i] = "@@" + math.length + "@@"; // replace the current block text with a unique tag to find later
|
|
|
if (pre_process)
|
|
|
block = pre_process(block);
|
|
|
math.push(block);
|
|
|
start = end = last = null;
|
|
|
}
|
|
|
|
|
|
// Break up the text into its component parts and search
|
|
|
// through them for math delimiters, braces, linebreaks, etc.
|
|
|
// Math delimiters must match and braces must balance.
|
|
|
// Don't allow math to pass through a double linebreak
|
|
|
// (which will be a paragraph).
|
|
|
//
|
|
|
var remove_math = function (text) {
|
|
|
if (!window.MathJax) {
|
|
|
return text;
|
|
|
}
|
|
|
|
|
|
start = end = last = null; // for tracking math delimiters
|
|
|
math = []; // stores math strings for later
|
|
|
|
|
|
// Except for extreme edge cases, this should catch precisely those pieces of the markdown
|
|
|
// source that will later be turned into code spans. While MathJax will not TeXify code spans,
|
|
|
// we still have to consider them at this point; the following issue has happened several times:
|
|
|
//
|
|
|
// `$foo` and `$bar` are varibales. --> <code>$foo ` and `$bar</code> are variables.
|
|
|
|
|
|
var hasCodeSpans = /`/.test(text),
|
|
|
de_tilde;
|
|
|
if (hasCodeSpans) {
|
|
|
text = text.replace(/~/g, "~T").replace(/(^|[^\\])(`+)([^\n]*?[^`\n])\2(?!`)/gm, function (wholematch) {
|
|
|
return wholematch.replace(/\$/g, "~D");
|
|
|
});
|
|
|
de_tilde = function (text) { return text.replace(/~([TD])/g, function (wholematch, character) { return { T: "~", D: "$" }[character]; }) };
|
|
|
} else {
|
|
|
de_tilde = function (text) { return text; };
|
|
|
}
|
|
|
|
|
|
blocks = IPython.utils.regex_split(text.replace(/\r\n?/g, "\n"),MATHSPLIT);
|
|
|
|
|
|
for (var i = 1, m = blocks.length; i < m; i += 2) {
|
|
|
var block = blocks[i];
|
|
|
if (block.charAt(0) === "@") {
|
|
|
//
|
|
|
// Things that look like our math markers will get
|
|
|
// stored and then retrieved along with the math.
|
|
|
//
|
|
|
blocks[i] = "@@" + math.length + "@@";
|
|
|
math.push(block);
|
|
|
}
|
|
|
else if (start) {
|
|
|
//
|
|
|
// If we are in math, look for the end delimiter,
|
|
|
// but don't go past double line breaks, and
|
|
|
// and balance braces within the math.
|
|
|
//
|
|
|
if (block === end) {
|
|
|
if (braces) {
|
|
|
last = i
|
|
|
}
|
|
|
else {
|
|
|
process_math(start, i, de_tilde)
|
|
|
}
|
|
|
}
|
|
|
else if (block.match(/\n.*\n/)) {
|
|
|
if (last) {
|
|
|
i = last;
|
|
|
process_math(start, i, de_tilde)
|
|
|
}
|
|
|
start = end = last = null;
|
|
|
braces = 0;
|
|
|
}
|
|
|
else if (block === "{") {
|
|
|
braces++
|
|
|
}
|
|
|
else if (block === "}" && braces) {
|
|
|
braces--
|
|
|
}
|
|
|
}
|
|
|
else {
|
|
|
//
|
|
|
// Look for math start delimiters and when
|
|
|
// found, set up the end delimiter.
|
|
|
//
|
|
|
if (block === inline || block === "$$") {
|
|
|
start = i;
|
|
|
end = block;
|
|
|
braces = 0;
|
|
|
}
|
|
|
else if (block.substr(1, 5) === "begin") {
|
|
|
start = i;
|
|
|
end = "\\end" + block.substr(6);
|
|
|
braces = 0;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
if (last) {
|
|
|
process_math(start, last, de_tilde)
|
|
|
}
|
|
|
return de_tilde(blocks.join(""));
|
|
|
}
|
|
|
|
|
|
//
|
|
|
// Put back the math strings that were saved,
|
|
|
// and clear the math array (no need to keep it around).
|
|
|
//
|
|
|
var replace_math = function (text) {
|
|
|
if (!window.MathJax) {
|
|
|
return text;
|
|
|
}
|
|
|
|
|
|
text = text.replace(/@@(\d+)@@/g, function (match, n) {
|
|
|
return math[n]
|
|
|
});
|
|
|
math = null;
|
|
|
return text;
|
|
|
}
|
|
|
|
|
|
return {
|
|
|
init : init,
|
|
|
process_math : process_math,
|
|
|
remove_math : remove_math,
|
|
|
replace_math : replace_math
|
|
|
};
|
|
|
|
|
|
}(IPython));
|
