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@niebert
niebert committed Jul 18, 2023
1 parent 31238e0 commit 298cea3
Showing 1 changed file with 128 additions and 56 deletions.
184 changes: 128 additions & 56 deletions src/closingbracket.js
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Original file line number Diff line number Diff line change
@@ -1,18 +1,4 @@
/* ---------------------------------------
Exported Module Variable: BracketHandler
Package: closingbracket
Version: 1.0.4 Date: 2020/10/16 19:04:09
Homepage: https://github.com/niebert/closingbracket#readme
Author: Engelbert Niehaus
License: MIT
Date: 2020/10/16 19:04:09
Require Module with:
const BracketHandler = require('closingbracket');
JSHint: installation with 'npm install jshint -g'
------------------------------------------ */

/*jshint laxcomma: true, asi: true, maxerr: 150 */
/*global alert, confirm, console, prompt */
function find_closing_bracket(expression,closebracket,startsearch_at){
var openbracket = "-";
var vResult = {
Expand Down Expand Up @@ -63,13 +49,13 @@ function find_closing_bracket(expression,closebracket,startsearch_at){
// from the bracket stack - i.e. pop from stack.
// If bracket stack is empty, then this closing
// bracket is the corresponding bracket for the
// first bracket pushed.
// last bracket pushed.
if (expression.charAt(index) == closebracket) {
bracket_stack.pop();
if (bracket_stack.length == 0) {
//console.log("Closing Bracket '" + closebracket+ "' found at position "+index);
vResult.closebracket_at = index;
index = expression.length;
index = expression.length; // to end while lopp
}
}
}
Expand All @@ -82,18 +68,135 @@ function find_closing_bracket(expression,closebracket,startsearch_at){
}
return vResult;
}

/*
var str = "MyCheck(asdas(iasd)asdas asd) ashdj(sakdjk))";
console.log("String: '" + str + "'");
console.log("find_closing_bracket() - String: '" + str + "'");
var vResult = find_closing_bracket(str,")",2);
console.log("Result: "+JSON.stringify(vResult,null,4));
console.log("Open Char At " + vResult.openbracket_at + ": '" + str.charAt(vResult.openbracket_at) + "'");
console.log("Close Char At " + vResult.closebracket_at + ": '" + str.charAt(vResult.closebracket_at) + "'");
console.log("find_closing_bracket() - Result: "+JSON.stringify(vResult,null,4));
console.log("find_closing_bracket() - Open Char At " + vResult.openbracket_at + ": '" + str.charAt(vResult.openbracket_at) + "'");
console.log("find_closing_bracket() - Close Char At " + vResult.closebracket_at + ": '" + str.charAt(vResult.closebracket_at) + "'");
*/

function find_opening_bracket(expression,openbracket,startsearch_at){
// searches backwards from the startsearch_at position and finds the
// corresponding opening bracket.
var closebracket = "-";
var pos_end = 0;
if (expression && expression.length > 0) {
startsearch_at = (startsearch_at || expression.length-1)
}
var vResult = {
"start_search": startsearch_at,
"openbracket_at": -1,
"closebracket_at": -1
};
switch (openbracket) {
case "[":
closebracket = "]";
break;
case "{":
closebracket = "}";
break;
case "(":
closebracket = ")";
break;
case "<":
closebracket = ">";
break;
default:
// undefined bracket
openbracket = "-";
}
if (openbracket != "-") {
var index = startsearch_at;
// check character at index if it is already
// the closing bracket to start with.
while ((index >=0) && (expression.charAt(index)!=closebracket)) {
index--;
}

//console.log("find_opening_bracket("+index+") - String: '" + str + "'");
if (index >= 0) {
vResult.closebracket_at = index;
//vResult.openbracket_at = index;
//console.log("Opening Bracket '" + openbracket+ "' found at position "+index);
var bracket_stack = [];
// Traverse through string starting from
// given index.
while (index >= 0){

function find_command_name(expression,startsearch_at) {
var index = (startsearch_at || 0);
if (expression.charAt(index) == closebracket) {
// If current character is an
// closing bracket push it in stack.
// that is performed for the last closing bracket as well.
bracket_stack.push(expression.charAt(index));
} else {
// If current character is a opening
// bracket, remove one closing bracket
// from the bracket stack - i.e. pop from stack.
// If bracket stack is empty, then this closing
// bracket is the corresponding bracket for the
// last bracket pushed.
if (expression.charAt(index) == openbracket) {
bracket_stack.pop();
// if backet stack is empty opening bracket found
if (bracket_stack.length == 0) {
//console.log("Closing Bracket '" + closebracket+ "' found at position "+index);
vResult.openbracket_at = index;
index = -1; // to end while loop
}
}
}
index--;
}

} else {
console.error("Opening Bracket not found in expression");
}
}
return vResult;
}

/*
var str = "MyCheck(asdas(iasd)asdas asd) ashdj(sakdjk))";
console.log("find_opening_bracket() - String: '" + str + "'");
var vResult = find_opening_bracket(str,"(",32);
console.log("find_opening_bracket() - Result: "+JSON.stringify(vResult,null,4));
console.log("find_opening_bracket() - Open Char At " + vResult.openbracket_at + ": '" + str.charAt(vResult.openbracket_at) + "'");
console.log("find_opening_bracket() - Close Char At " + vResult.closebracket_at + ": '" + str.charAt(vResult.closebracket_at) + "'");
*/

function find_parameter_of_function(expression,fct,fctpos) {
var vReturn = {
"start_search": 0,
"openbracket_at": -1,
"closebracket_at": -1
};
var params4fct = "-"; // undefined;
if (expression) {
var pos = fctpos || expression.indexOf(fct+"(");
if (pos >= 0) {
// command is found
params4fct = fct;
vReturn = find_closing_bracket(expression,")",pos);
if (vReturn.openbracket_at >= 0) {
if (vReturn.closebracket_at >= 0) {
params4fct = expression.substring(vReturn.openbracket_at+1,vReturn.closebracket_at);
console.log("parameter '"+params4fct+"' of function found fct='" + fct + "'");
}
}
}
}
//console.log("expression 3='"+expression+"'");
if (params4fct == "-") {
console.error("CALL: find_parameter_of_function() - function name not found");
}
return params4fct;
}


function find_command_name4newcommand(expression,startsearch_at) {
var cmd_name = "-"; // undefined;
var vReturn = find_closing_bracket(expression,"}",1);
/* undefined results for
Expand All @@ -111,7 +214,7 @@ function find_command_name(expression,startsearch_at) {
}
}
if (cmd_name == "-") {
console.error("CALL: find_command_name() - command name not found");
console.error("CALL: find_command_name4newcommand() - command name not found");
}
return cmd_name;
}
Expand Down Expand Up @@ -168,7 +271,7 @@ function parse_newcommands(expression,index) {
index = expression.indexOf("\\newcommand{");
expression = expression.substr(index);
//console.log("expression 3='"+expression+"'");
var cmd_name = find_command_name(expression,0);
var cmd_name = find_command_name4newcommand(expression,0);
if (cmd_name != "-") {
cmd.name = cmd_name;
// 12 = length "\newcommand{"
Expand Down Expand Up @@ -377,38 +480,6 @@ function replace_newcommands(expression,pNewCommands,pmax_recursion) {
return expression;
}



var latex = "Beispiel: \n \\newcommand{\\mycmd}[3]{Gleichung (\\ref{#1}) $\\frac{#2}{#3}$ Ende} bewirkt\n bei Einsatz in \\mycmd{Nr1}{Bla}{Blub} die Ausgabe";
latex += "\\newcommand{\\secondcmd}[4]{Gleichung {hjsd{}{}} enge} askjdkasld \\noparamdef ladslkl";
latex += "\n \\newcommand{\\noparamdef}{Definition as a no parameter {New{C}{om}}mand } askjdkasld";
latex = "Beispiel: \\newcommand{\\mycmd}[3]{Gleichung (\\ref{#1}) $\\frac{#2}{#3}$ Ende} bewirkt\n bei Einsatz in \\mycmd{Nr1}{Bla}{Blub} die Ausgabe \\mycmd{FIRST}{SECOND}{THIRD} XXXX";
latex = `
\\newcommand{\\tool}[2]{Title #1: The #1 is used for #2}
\\newcommand{\\cmd}[3]{\\int_{#1}^{#2} f(#3) d#3}
\\tool{hammer}{nails}
\\tool{hammer}{nails}
\\tool{hammer}{nails}
Mathematical expressions are
$\\cmd{4}{5}{x}$ and $\\cmd{a}{b}{y}$
`;
latex = `
\\newcommand{\\tool}[2]{\\tooltitle{#1} The #1 is used for #2}
\\newcommand{\\tooltitle}[1]{Title #1: }
\\tool{hammer}{nails}
`;

var vNewCommands = parse_newcommands(latex);
console.log("JSON: "+ JSON.stringify(vNewCommands,null,4));
var expression = replace_newcommands(latex,vNewCommands);
console.log("-------------------------------------");
console.log("Source: '" + latex + "'");
console.log("-------------------------------------");
console.log("Result: '" + expression + "'");
console.log("-------------------------------------");

function clone_json(a) {
var c = JSON.parse(JSON.stringify(a));
return c;
Expand All @@ -425,6 +496,7 @@ function concat_array (a,b) {

var BracketHandler = {
"find_closing_bracket": find_closing_bracket,
"find_opening_bracket": find_opening_bracket,
"parse_newcommands": parse_newcommands,
"replace_newcommands": replace_newcommands,
"concat_array":concat_array,
Expand Down

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