mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-10-29 22:26:17 +00:00
299 lines
8.8 KiB
JavaScript
299 lines
8.8 KiB
JavaScript
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//--
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//-- Augmented methods for the JavaScript String() object
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//--
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// Get characters from the right end of a string
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String.prototype.right = function(n)
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{
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return n < this.length ? this.slice(this.length-n) : this;
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};
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// Trim whitespace from both ends of a string
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String.prototype.trim = function()
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{
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return this.replace(/^\s*|\s*$/g,"");
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};
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// Convert a string from a CSS style property name to a JavaScript style name ("background-color" -> "backgroundColor")
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String.prototype.unDash = function()
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{
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var t,s = this.split("-");
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if(s.length > 1) {
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for(t=1; t<s.length; t++)
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s[t] = s[t].substr(0,1).toUpperCase() + s[t].substr(1);
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}
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return s.join("");
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};
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// Substitute substrings from an array into a format string that includes '%1'-type specifiers
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String.prototype.format = function(s)
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{
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var substrings = s && s.constructor == Array ? s : arguments;
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var subRegExp = /(?:%(\d+))/mg;
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var currPos = 0;
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var match,r = [];
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do {
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match = subRegExp.exec(this);
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if(match && match[1]) {
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if(match.index > currPos)
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r.push(this.substring(currPos,match.index));
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r.push(substrings[parseInt(match[1],10)]);
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currPos = subRegExp.lastIndex;
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}
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} while(match);
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if(currPos < this.length)
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r.push(this.substring(currPos,this.length));
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return r.join("");
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};
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// Escape any special RegExp characters with that character preceded by a backslash
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String.prototype.escapeRegExp = function()
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{
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var s = "\\^$*+?()=!|,{}[].";
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var t,c = this;
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for(t=0; t<s.length; t++)
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c = c.replace(new RegExp("\\" + s.substr(t,1),"g"),"\\" + s.substr(t,1));
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return c;
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};
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// Convert "\" to "\s", newlines to "\n" (and remove carriage returns)
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String.prototype.escapeLineBreaks = function()
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{
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return this.replace(/\\/mg,"\\s").replace(/\n/mg,"\\n").replace(/\r/mg,"");
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};
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// Convert "\n" to newlines, "\b" to " ", "\s" to "\" (and remove carriage returns)
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String.prototype.unescapeLineBreaks = function()
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{
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return this.replace(/\\n/mg,"\n").replace(/\\b/mg," ").replace(/\\s/mg,"\\").replace(/\r/mg,"");
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};
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// Convert & to "&", < to "<", > to ">" and " to """
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String.prototype.htmlEncode = function()
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{
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return this.replace(/&/mg,"&").replace(/</mg,"<").replace(/>/mg,">").replace(/\"/mg,""");
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};
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// Convert "&" to &, "<" to <, ">" to > and """ to "
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String.prototype.htmlDecode = function()
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{
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return this.replace(/</mg,"<").replace(/>/mg,">").replace(/"/mg,"\"").replace(/&/mg,"&");
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};
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// Parse a space-separated string of name:value parameters
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//# where:
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//# - the name or the value can be optional (in which case separate defaults are used instead)
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//# - in case of ambiguity, a lone word is taken to be a value
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//# - if 'cascadeDefaults' is set to true, then the defaults are modified by updated by each specified name or value
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//# - name prefixes are not allowed if the 'noNames' parameter is true
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//# - if both the name and value are present they must be separated by a colon
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//# - the name and the value may both be quoted with single- or double-quotes, double-square brackets
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//# - names or values quoted with {{double-curly braces}} are evaluated as a JavaScript expression
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//# - as long as the 'allowEval' parameter is true
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// The result is an array of objects:
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// result[0] = object with a member for each parameter name, value of that member being an array of values
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// result[1..n] = one object for each parameter, with 'name' and 'value' members
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String.prototype.parseParams = function(defaultName,defaultValue,allowEval,noNames,cascadeDefaults)
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{
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var parseToken = function(match,p) {
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var n;
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if(match[p]) // Double quoted
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n = match[p];
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else if(match[p+1]) // Single quoted
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n = match[p+1];
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else if(match[p+2]) // Double-square-bracket quoted
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n = match[p+2];
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else if(match[p+3]) // Double-brace quoted
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try {
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n = match[p+3];
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if(allowEval && config.evaluateMacroParameters != "none") {
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if(config.evaluateMacroParameters == "restricted") {
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if(window.restrictedEval) {
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n = window.restrictedEval(n);
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}
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} else {
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n = window.eval(n);
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}
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}
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} catch(ex) {
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throw "Unable to evaluate {{" + match[p+3] + "}}: " + exceptionText(ex);
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}
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else if(match[p+4]) // Unquoted
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n = match[p+4];
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else if(match[p+5]) // empty quote
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n = "";
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return n;
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};
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var r = [{}];
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var dblQuote = "(?:\"((?:(?:\\\\\")|[^\"])+)\")";
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var sngQuote = "(?:'((?:(?:\\\\\')|[^'])+)')";
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var dblSquare = "(?:\\[\\[((?:\\s|\\S)*?)\\]\\])";
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var dblBrace = "(?:\\{\\{((?:\\s|\\S)*?)\\}\\})";
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var unQuoted = noNames ? "([^\"'\\s]\\S*)" : "([^\"':\\s][^\\s:]*)";
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var emptyQuote = "((?:\"\")|(?:''))";
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var skipSpace = "(?:\\s*)";
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var token = "(?:" + dblQuote + "|" + sngQuote + "|" + dblSquare + "|" + dblBrace + "|" + unQuoted + "|" + emptyQuote + ")";
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var re = noNames ? new RegExp(token,"mg") : new RegExp(skipSpace + token + skipSpace + "(?:(\\:)" + skipSpace + token + ")?","mg");
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var match;
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do {
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match = re.exec(this);
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if(match) {
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var n = parseToken(match,1);
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if(noNames) {
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r.push({name:"",value:n});
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} else {
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var v = parseToken(match,8);
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if(v == null && defaultName) {
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v = n;
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n = defaultName;
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} else if(v == null && defaultValue) {
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v = defaultValue;
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}
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r.push({name:n,value:v});
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if(cascadeDefaults) {
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defaultName = n;
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defaultValue = v;
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}
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}
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}
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} while(match);
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// Summarise parameters into first element
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var t;
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for(t=1; t<r.length; t++) {
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if(r[0][r[t].name])
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r[0][r[t].name].push(r[t].value);
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else
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r[0][r[t].name] = [r[t].value];
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}
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return r;
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};
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// Process a string list of macro parameters into an array. Parameters can be quoted with "", '',
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// [[]], {{ }} or left unquoted (and therefore space-separated). Double-braces {{}} results in
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// an *evaluated* parameter: e.g. {{config.options.txtUserName}} results in the current user's name.
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String.prototype.readMacroParams = function(notAllowEval)
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{
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var p = this.parseParams("list",null,!notAllowEval,true);
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var t,n = [];
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for(t=1; t<p.length; t++)
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n.push(p[t].value);
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return n;
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};
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// Process a string list of unique tiddler names into an array. Tiddler names that have spaces in them must be [[bracketed]]
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String.prototype.readBracketedList = function(unique)
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{
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var p = this.parseParams("list",null,false,true);
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var t,n = [];
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for(t=1; t<p.length; t++) {
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if(p[t].value)
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n.pushUnique(p[t].value,unique);
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}
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return n;
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};
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// Returns array with start and end index of chunk between given start and end marker, or undefined.
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String.prototype.getChunkRange = function(start,end)
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{
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var s = this.indexOf(start);
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if(s != -1) {
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s += start.length;
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var e = this.indexOf(end,s);
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if(e != -1)
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return [s,e];
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}
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};
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// Replace a chunk of a string given start and end markers
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String.prototype.replaceChunk = function(start,end,sub)
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{
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var r = this.getChunkRange(start,end);
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return r ? this.substring(0,r[0]) + sub + this.substring(r[1]) : this;
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};
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// Returns a chunk of a string between start and end markers, or undefined
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String.prototype.getChunk = function(start,end)
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{
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var r = this.getChunkRange(start,end);
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if(r)
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return this.substring(r[0],r[1]);
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};
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// Static method to bracket a string with double square brackets if it contains a space
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String.encodeTiddlyLink = function(title)
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{
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return title.indexOf(" ") == -1 ? title : "[[" + title + "]]";
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};
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// Static method to encodeTiddlyLink for every item in an array and join them with spaces
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String.encodeTiddlyLinkList = function(list)
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{
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if(list) {
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var t,results = [];
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for(t=0; t<list.length; t++)
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results.push(String.encodeTiddlyLink(list[t]));
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return results.join(" ");
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} else {
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return "";
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}
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};
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// Convert a string as a sequence of name:"value" pairs into a hashmap
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String.prototype.decodeHashMap = function()
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{
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var fields = this.parseParams("anon","",false);
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var t,r = {};
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for(t=1; t<fields.length; t++)
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r[fields[t].name] = fields[t].value;
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return r;
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};
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// Static method to encode a hashmap into a name:"value"... string
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String.encodeHashMap = function(hashmap)
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{
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var t,r = [];
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for(t in hashmap)
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r.push(t + ':"' + hashmap[t] + '"');
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return r.join(" ");
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};
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// Static method to left-pad a string with 0s to a certain width
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String.zeroPad = function(n,d)
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{
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var s = n.toString();
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if(s.length < d)
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s = "000000000000000000000000000".substr(0,d-s.length) + s;
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return s;
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};
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String.prototype.startsWith = function(prefix)
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{
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return !prefix || this.substring(0,prefix.length) == prefix;
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};
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// Returns the first value of the given named parameter.
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//#
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//# @param params
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//# as returned by parseParams or null/undefined
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//# @return [may be null/undefined]
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//#
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function getParam(params,name,defaultValue)
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{
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if(!params)
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return defaultValue;
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var p = params[0][name];
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return p ? p[0] : defaultValue;
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}
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// Returns the first value of the given boolean named parameter.
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//#
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//# @param params
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//# as returned by parseParams or null/undefined
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//#
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function getFlag(params,name,defaultValue)
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{
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return !!getParam(params,name,defaultValue);
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}
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