latex.hsnips

global
const langChanger = require("child_process").spawn("powershell", ["$wshell = New-Object -ComObject wscript.shell;while($true){$in = Read-Host;if($in -eq \"\"){break;}$wshell.SendKeys('+^');}"]);
function math(context) {
    return context.scopes.some(s => s.startsWith("meta.math"));
}
endglobal

# AUTO SNIPPETS

snippet `\\\(\s$` "Change language when inside math" A
``
    langChanger.stdin.write("1\n")
    rv = "\\( "
``
endsnippet

snippet `\\\)[ ,.]$` "Change language when end math" A
``
    langChanger.stdin.write("1\n")
    rv = m[0]
``
endsnippet

snippet `\\\[\s$` "Change language when inside math" A
``
    langChanger.stdin.write("1\n")
    rv = "\\[ "
``
endsnippet

snippet `\\\][ ,.]$` "Change language when end math" A
``
    langChanger.stdin.write("1\n")
    rv = m[0]
``
endsnippet

# snippet mk "Math start" A
snippet ьл "Math start" A
\($1\)$0
endsnippet

snippet ьд "Big math start" A
\[$1\]$0
endsnippet

# snippet em "Emph" A
# \emph{$1}$0 
# endsnippet

snippet уь "Emph" A
\emph{$1}$0 
endsnippet

# snippet `\\emph{\s$` "Change language when inside emph" A
# ``
#     langChanger.stdin.write("1\n")
#     rv = "\\emph{"
# ``
# endsnippet

# SNIPPETS ENABLED IN MATH MODE

context math(context)
snippet txt "Text inside math" A
\text{$1}$0 
endsnippet

context math(context)
snippet `\\text{\s$` "Change language when inside text" A
``
    langChanger.stdin.write("1\n")
    rv = "\\text{"
``
endsnippet

context math(context)
snippet `(.+)\/` "Fraction" A
``
    let str = m[1];
    let lastIndex = str.length - 1;
    let depth = 0;
    let i = lastIndex;
    for (i; i >= 0; i--) {
        if (str[i] == '}') depth += 1;
        if (str[i] == '{') depth -= 1;
        if ((depth < 0) || (depth == 0 && str[i] == ' ')) break;
    }
    i++;
    let over = str.slice(i);
    if (over.slice(0, 1) == "{" 
    && over.slice(-1) == "}" 
    && depth == 0) {
        over = over.slice(1,over.length - 1);    
    }
    rv = str.slice(0, i) + "\\dfrac{ " + over + "}";
``{ $1}$0
endsnippet

context math(context)
snippet `\\dfrac{(.*)}{(.*)}s` "Change to simple fraction" A
``
    let str = m[0];
    let res = str;
    let lastIndex = str.length - 1;
    let depth = 0;
    let brackets_count = 0;
    let first_in_brackets = "";
    let second_in_brackets = "";
    let end_of_second_index = lastIndex;
    let i = lastIndex;
    for (i; i >= 0; i--) {
        if (str[i] == '}') depth += 1;
        if (str[i] == '{') depth -= 1;
        if (depth < 0) break;
        if (depth == 0 && str[i] == '{') {
            brackets_count++;
            if (brackets_count == 1) {
                first_in_brackets = str.slice(i + 1, lastIndex - 1);
                end_of_second_index = i - 1;
            }
            if (brackets_count == 2) second_in_brackets = str.slice(i + 1, end_of_second_index);
        }
        if (brackets_count == 2) {
            if (str.slice(i - 6, i) == "\\dfrac") res = str.slice(0, i - 6) + "\\frac{" + second_in_brackets + "}{" + first_in_brackets + "}";
            break;
        }
    }
    rv = res;
``
endsnippet

context math(context)
snippet `(.)ml` "Brackets (start with left)" A
``
    rv = m[1]
``\left( $1\right)$0
endsnippet

context math(context)
snippet `(.)mk` "Brackets (start with left)" A
``
    rv = m[1]
``\left( $1\right)$0
endsnippet

context math(context)
snippet `(.)}` "Curly brackets" A
``
    rv = m[1]
``\left\{ $1\right\\}$0
endsnippet

context math(context)
snippet `(.)\]` "Square brackets" A
``
    rv = m[1]
``\left[ $1\right]$0
endsnippet

context math(context)
snippet `(.)\|` "Abs" A
``
    rv = m[1]
``\left| $1\right|$0
endsnippet

context math(context)
snippet <= "leq" A
\leq 
endsnippet

context math(context)
snippet >= "geq" A
\geq 
endsnippet

context math(context)
snippet != "neq" A
\neq 
endsnippet

# context math(context)
# snippet `\\;\s\s$` "Space limit" A
# \; 
# endsnippet

snippet `\s\s$` "Space" A
\quad
endsnippet

context math(context)
snippet `([^\,\.\s]+)\..` "High index" A
``rv = m[1]``^{ $1}$0
endsnippet

context math(context)
snippet `([^\,\.\s]+)\,,` "Low index" A
``rv = m[1]``_{ $1}$0
endsnippet

context math(context)
snippet ol "Overline" A
\tilde{$1}$0
endsnippet

context math(context)
snippet `(\S+)ul` "Underline" A
\underline{``rv = m[1]``}
endsnippet

context math(context)
snippet `(\S+)os` "Overset" A
\overset{ $1}{``rv = m[1]``}$0
endsnippet

context math(context)
snippet `(\S+)us` "Underset" A
\underset{ $1}{``rv = m[1]``}$0
endsnippet

context math(context)
snippet nl "New line" A
``
    rv = "\\\\\\\n"
``
endsnippet

context math(context)
snippet ` in ` "In" A
 \in 
endsnippet

context math(context)
snippet to "To" A
\to 
endsnippet

context math(context)
snippet ra "Right arrow" A
\longrightarrow 
endsnippet

context math(context)
snippet imp "Implies" A
\implies 
endsnippet

context math(context)
snippet lra "Left right arrow" A
\longleftrightarrow 
endsnippet

context math(context)
snippet ri "Right implies" A
\Longrightarrow 
endsnippet

context math(context)
snippet li "Left implies" A
\Longleftarrow 
endsnippet

context math(context)
snippet lri "Left right implies" A
\Longleftrightarrow 
endsnippet

context math(context)
snippet le "Let" A
\Let \; 
endsnippet

context math(context)
snippet fa "Forall" A
\forall \\;
endsnippet

context math(context)
snippet phi "Phi" A
\Phi
endsnippet

context math(context)
snippet ro "Rho" A
\rho
endsnippet

context math(context)
snippet ex "Exists" A
\exists \; 
endsnippet

context math(context)
snippet lo "Look" A
\measuredangle \; 
endsnippet

context math(context)
snippet sb "Subset" A
\subseteq
endsnippet

context math(context)
snippet sp "Supset" A
\supset 
endsnippet

context math(context)
snippet sp "Supset" A
\supset 
endsnippet

context math(context)
snippet sum "Sum" A
\sum\limits_{ $1}^{ $2} $0
endsnippet

context math(context)
snippet int "Integral" A
\displaystyle\int\limits_{ $1}^{ $2} $0
endsnippet

context math(context)
snippet oint "Contour integral" A
\displaystyle\oint\limits_{ $1}^{ $2} $0
endsnippet

context math(context)
snippet iint "Double integral" A
\displaystyle\iint\limits_{ $1}^{ $2} $0
endsnippet

context math(context)
snippet lm "Limit" A
\lim\limits_{ $1} $0
endsnippet

context math(context)
snippet ... "Dots" A
\dots
endsnippet

context math(context)
snippet max "Max" A
\max\limits_{ $1} $0
endsnippet

context math(context)
snippet min "Min" A
\min\limits_{ $1} $0
endsnippet

context math(context)
snippet bu "Big cup" A
\bigcup\limits_{ $1}^{ $2} $0
endsnippet

context math(context)
snippet ba "Big cap" A
\bigcap\limits_{ $1}^{ $2} $0
endsnippet

context math(context)
snippet uu "Cup" A
\cup 
endsnippet

context math(context)
snippet aa "Cap" A
\cap 
endsnippet

context math(context)
snippet bs "Backslash" A
\backslash 
endsnippet

context math(context)
snippet rt "Root" A
\sqrt[$1]{$2}$0
endsnippet

context math(context)
snippet eps "Epsilon" A
\varepsilon 
endsnippet

context math(context)
snippet del "Delta" A
\delta 
endsnippet

context math(context)
snippet Del "Big Delta" A
\Delta 
endsnippet

context math(context)
snippet lam "Lambda" A
\lambda 
endsnippet

context math(context)
snippet vf "Little phi" A
\varphi 
endsnippet

context math(context)
snippet va "Alpha" A
\alpha 
endsnippet

context math(context)
snippet vb "Beta" A
\beta 
endsnippet

context math(context)
snippet vr "Rho" A
\rho
endsnippet

# Partial need to be in the end
context math(context)
snippet `(.*[^\\\s])pp` "Partial" A
``
    let str = m[1];
    let lastIndex = str.length - 1;
    let depth = 0;
    let i = lastIndex;
    for (i; i >= 0; i--) {
        if (str[i] == '}') depth += 1;
        if (str[i] == '{') depth -= 1;
        if ((depth < 0) || (depth == 0 && str[i] == ' ')) break;
    }
    i++;
    let over = str.slice(i);
    if (over.slice(0, 1) == "{" 
    && over.slice(-1) == "}" 
    && depth == 0) {
        over = over.slice(1,over.length - 1);    
    }
    rv = str.slice(0, i) + "\\dfrac{ \\partial " + over + "}";
``{ \partial $1}$0
endsnippet

context math(context)
snippet `\\dfrac{ \\partial (\S+)}{ \\partial (\S+)\^` "Partial with the power" A
\dfrac{ \partial^{$1} ``rv = m[1] + "}{ \\partial " + m[2]``^{$1}
endsnippet

snippet beg "[G] begin/end" w
\\begin{$1}
	$0
\\end{$1}
endsnippet