mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-09-19 18:59:42 +00:00
9612aac296
Now shadow tiddlers are any tiddler whose title starts with "$:/"
331 lines
12 KiB
JavaScript
331 lines
12 KiB
JavaScript
/*\
|
|
title: $:/core/modules/filters.js
|
|
type: application/javascript
|
|
module-type: wikimethod
|
|
|
|
Adds tiddler filtering to the $tw.Wiki object.
|
|
|
|
\*/
|
|
(function(){
|
|
|
|
/*jslint node: true, browser: true */
|
|
/*global $tw: false */
|
|
"use strict";
|
|
|
|
exports.filterTiddlers = function(filterString,currTiddlerTitle,tiddlerList) {
|
|
var fn = this.compileFilter(filterString);
|
|
return fn.call(this,tiddlerList || this.tiddlers,currTiddlerTitle);
|
|
};
|
|
|
|
/*
|
|
Compiling a filter gives a JavaScript function that is invoked as `this.filter(source)`, where `source` is a hashmap of source tiddler titles (the values don't matter, so it is possible to use a store or a changes object). It returns an array of tiddler titles that satisfy the filter
|
|
*/
|
|
exports.compileFilter = function(filterString) {
|
|
var filter = this.parseFilter(filterString),
|
|
output = [],
|
|
t,operation,operationInfo,type,p,operator,operatorInfo,fn;
|
|
output.push(this.filterFragments.prologue);
|
|
for(t=0; t<filter.length; t++) {
|
|
operation = filter[t];
|
|
operationInfo = this.filterFragments.operation.prefix[operation.prefix || ""];
|
|
output.push(operationInfo.prologue);
|
|
type = "selector";
|
|
if(operation.prefix === "+") {
|
|
type = "filter";
|
|
}
|
|
for(p=0; p<operation.operators.length; p++) {
|
|
operator = operation.operators[p];
|
|
operatorInfo = this.operators[operator.operator];
|
|
if(!operatorInfo) { // Check for it being a field operator
|
|
operatorInfo = this.operators.field;
|
|
}
|
|
output.push(operatorInfo[type](operator));
|
|
type = "filter";
|
|
}
|
|
output.push(operationInfo.epilogue);
|
|
}
|
|
output.push(this.filterFragments.epilogue);
|
|
try {
|
|
/*jslint evil: true */
|
|
fn = eval(output.join("\n"));
|
|
} catch(ex) {
|
|
throw "Error in filter expression: " + ex;
|
|
}
|
|
return fn;
|
|
};
|
|
|
|
exports.filterFragments = {
|
|
prologue: "(function(source,currTiddlerTitle) {\nvar results = [], subResults, subResultsTemp, title, r, t;",
|
|
epilogue: "return results;\n})",
|
|
operation: {
|
|
prefix: {
|
|
"": {
|
|
prologue: "subResults = [];",
|
|
epilogue: "$tw.utils.pushTop(results,subResults);"
|
|
},
|
|
"+": {
|
|
prologue: "subResults = results.slice(0);\nresults.splice(0,results.length);",
|
|
epilogue: "$tw.utils.pushTop(results,subResults);"
|
|
},
|
|
"-": {
|
|
prologue: "subResults = [];",
|
|
epilogue: "$tw.utils.removeArrayEntries(results,subResults);"
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
exports.operators = {
|
|
"title": { // Filter by title
|
|
selector: function(operator) {
|
|
return "$tw.utils.pushTop(subResults,\"" + $tw.utils.stringify(operator.operand) + "\");";
|
|
},
|
|
filter: function(operator) {
|
|
return "if(subResults.indexOf(\"" + $tw.utils.stringify(operator.operand) + "\") !== -1) {subResults = [\"" + $tw.utils.stringify(operator.operand) + "\"];} else {subResults = [];}";
|
|
}
|
|
},
|
|
"prefix": { // Filter by title prefix
|
|
selector: function(operator) {
|
|
var op = operator.prefix === "!" ? "!" : "=";
|
|
return "for(title in source) {if(title.substr(0," + operator.operand.length + ")" + op + "==\"" + $tw.utils.stringify(operator.operand) + "\") {$tw.utils.pushTop(subResults,title);}}";
|
|
},
|
|
filter: function(operator) {
|
|
var op = operator.prefix === "!" ? "=" : "!";
|
|
return "for(r=subResults.length-1; r>=0; r--) {if(title.substr(0," + operator.operand.length + ")" + op + "==\"" + $tw.utils.stringify(operator.operand) + "\") {subResults.splice(r,1);}}";
|
|
}
|
|
},
|
|
"is": { // Filter by status
|
|
selector: function(operator) {
|
|
var op = operator.prefix === "!" ? "!" : "";
|
|
switch(operator.operand) {
|
|
case "current":
|
|
if(operator.prefix === "!") {
|
|
return "for(title in source) {if(title !== currTiddlerTitle) {$tw.utils.pushTop(subResults,title);}}";
|
|
} else {
|
|
return "$tw.utils.pushTop(subResults,currTiddlerTitle);";
|
|
}
|
|
break;
|
|
case "shadow":
|
|
return "for(title in source) {if(" + op + "this.getTiddler(title).isShadow()) {$tw.utils.pushTop(subResults,title);}}";
|
|
default:
|
|
throw "Unknown operand for 'is' filter operator";
|
|
}
|
|
},
|
|
filter: function(operator) {
|
|
var op = operator.prefix === "!" ? "" : "!";
|
|
switch(operator.operand) {
|
|
case "current":
|
|
if(operator.prefix === "!") {
|
|
return "for(r=subResults.length-1; r>=0; r--) {if(subResults[r] === currTiddlerTitle) {subResults.splice(r,1);}}";
|
|
} else {
|
|
return "r = subResults.indexOf(currTiddlerTitle);\nif(r !== -1) {subResults = [currTiddlerTitle];} else {subResults = [];}";
|
|
}
|
|
break;
|
|
case "shadow":
|
|
return "for(r=subResults.length-1; r>=0; r--) {if(" + op + "this.getTiddler(subResults[r]).isShadow()) {subResults.splice(r,1);}}";
|
|
default:
|
|
throw "Unknown operand for 'is' filter operator";
|
|
}
|
|
}
|
|
},
|
|
"tag": { // Filter by tag
|
|
selector: function(operator) {
|
|
var op = operator.prefix === "!" ? "!" : "";
|
|
return "for(title in source) {if(" + op + "this.getTiddler(title).hasTag(\"" + $tw.utils.stringify(operator.operand) + "\")) {$tw.utils.pushTop(subResults,title);}}";
|
|
},
|
|
filter: function(operator) {
|
|
var op = operator.prefix === "!" ? "" : "!";
|
|
return "for(r=subResults.length-1; r>=0; r--) {if(" + op + "this.getTiddler(subResults[r]).hasTag(\"" + $tw.utils.stringify(operator.operand) + "\")) {subResults.splice(r,1);}}";
|
|
}
|
|
},
|
|
"tags": { // Return all tags used on selected tiddlers
|
|
selector: function(operator) {
|
|
return "for(title in source) {r = this.getTiddler(title); if(r && r.fields.tags) {$tw.utils.pushTop(subResults,r.fields.tags);}}";
|
|
},
|
|
filter: function(operator) {
|
|
return "subResultsTemp = subResults;\nsubResults = [];for(t=subResultsTemp.length-1; t>=0; t--) {r = this.getTiddler(subResultsTemp[t]); if(r && r.fields.tags) {$tw.utils.pushTop(subResults,r.fields.tags);}}";
|
|
}
|
|
},
|
|
"tagging": { // Return all tiddlers tagged with any of the selected tags
|
|
selector: function(operator) {
|
|
return "for(title in source) {$tw.utils.pushTop(subResults,this.getTiddlersWithTag(title));}";
|
|
},
|
|
filter: function(operator) {
|
|
return "subResultsTemp = subResults;\nsubResults = [];for(t=subResultsTemp.length-1; t>=0; t--) {$tw.utils.pushTop(subResults,this.getTiddlersWithTag(subResultsTemp[t]));}";
|
|
}
|
|
},
|
|
"has": { // Filter by presence of a particular field
|
|
selector: function(operator) {
|
|
var op = operator.prefix === "!" ? "=" : "!";
|
|
return "for(title in source) {if(this.getTiddler(title).fields[\"" + $tw.utils.stringify(operator.operand) + "\"] " + op + "== undefined) {$tw.utils.pushTop(subResults,title);}}";
|
|
},
|
|
filter: function(operator) {
|
|
var op = operator.prefix === "!" ? "!" : "=";
|
|
return "for(r=subResults.length-1; r>=0; r--) {if(this.getTiddler(subResults[r]).fields[\"" + $tw.utils.stringify(operator.operand) + "\"] " + op + "== undefined) {subResults.splice(r,1);}}";
|
|
}
|
|
},
|
|
"sort": { // Sort selected tiddlers
|
|
selector: function(operator) {
|
|
throw "Cannot use sort operator at the start of a filter operation";
|
|
},
|
|
filter: function(operator) {
|
|
var desc = operator.prefix === "!" ? "true" : "false";
|
|
return "this.sortTiddlers(subResults,\"" + $tw.utils.stringify(operator.operand) + "\"," + desc + ");";
|
|
}
|
|
}, // Case insensitive sort of selected tiddlers
|
|
"sort-case-sensitive": {
|
|
selector: function(operator) {
|
|
throw "Cannot use sort operator at the start of a filter operation";
|
|
},
|
|
filter: function(operator) {
|
|
var desc = operator.prefix === "!" ? "true" : "false";
|
|
return "this.sortTiddlers(subResults,\"" + $tw.utils.stringify(operator.operand) + "\"," + desc + ",true);";
|
|
}
|
|
},
|
|
"limit": { // Limit number of members of selection
|
|
selector: function(operator) {
|
|
throw "Cannot use limit operator at the start of a filter operation";
|
|
},
|
|
filter: function(operator) {
|
|
var limit = parseInt(operator.operand,10),
|
|
base = operator.prefix === "!" ? 0 : limit;
|
|
return "if(subResults.length > " + limit + ") {subResults.splice(" + base + ",subResults.length-" + limit + ");}";
|
|
}
|
|
},
|
|
"list": { // Select all tiddlers that are listed (or not listed) in the specified tiddler
|
|
selector: function(operator) {
|
|
if(operator.prefix === "!") {
|
|
return "var list = this.getTiddlerList(\"" + $tw.utils.stringify(operator.operand) + "\");" +
|
|
"for(title in source) {if(list.indexOf(title) === -1) {$tw.utils.pushTop(subResults,title);}}";
|
|
} else {
|
|
return "$tw.utils.pushTop(subResults,this.getTiddlerList(\"" + $tw.utils.stringify(operator.operand) + "\"));";
|
|
}
|
|
},
|
|
filter: function(operator) {
|
|
var op = operator.prefix === "!" ? "!==" : "===";
|
|
return "var list = this.getTiddlerList(\"" + $tw.utils.stringify(operator.operand) + "\");" +
|
|
"for(r=subResults.length-1; r>=0; r--) {if(list.indexOf(title) " + op + " -1) {subResults.splice(r,1);}}";
|
|
}
|
|
},
|
|
"searchVia": { // Search for the string in the operand tiddler
|
|
selector: function(operator) {
|
|
var op = operator.prefix === "!" ? "true" : "false";
|
|
return "var term = this.getTiddler(\"" + $tw.utils.stringify(operator.operand) + "\").fields.text;" +
|
|
"$tw.utils.pushTop(subResults,this.search(term,{titles: source, invert: " + op + ", exclude: [\"" + $tw.utils.stringify(operator.operand) + "\"]}));";
|
|
},
|
|
filter: function(operator) {
|
|
var op = operator.prefix === "!" ? "true" : "false";
|
|
return "var term = this.getTiddler(\"" + $tw.utils.stringify(operator.operand) + "\").fields.text;" +
|
|
"subResults = this.search(term,{titles: subResults, invert: " + op + ", exclude: [\"" + $tw.utils.stringify(operator.operand) + "\"]});";
|
|
}
|
|
},
|
|
"field": { // Special handler for field comparisons
|
|
selector: function(operator) {
|
|
var op = operator.prefix === "!" ? "!" : "=";
|
|
return "for(title in source) {if(this.getTiddler(title).fields[\"" + $tw.utils.stringify(operator.operator) + "\"] " + op + "== \"" + operator.operand + "\") {$tw.utils.pushTop(subResults,title);}}";
|
|
},
|
|
filter: function(operator) {
|
|
var op = operator.prefix === "!" ? "=" : "!";
|
|
return "for(r=subResults.length-1; r>=0; r--) {if(this.getTiddler(subResults[r]).fields[\"" + $tw.utils.stringify(operator.operator) + "\"] " + op + "== \"" + operator.operand + "\") {subResults.splice(r,1);}}";
|
|
}
|
|
}
|
|
};
|
|
|
|
/*
|
|
Parses an operation within a filter string
|
|
results: Array of array of operator nodes into which results should be inserted
|
|
filterString: filter string
|
|
p: start position within the string
|
|
Returns the new start position, after the parsed operation
|
|
*/
|
|
function parseFilterOperation(operators,filterString,p) {
|
|
var operator, operand, bracketPos;
|
|
// Skip the starting square bracket
|
|
if(filterString[p++] !== "[") {
|
|
throw "Missing [ in filter expression";
|
|
}
|
|
// Process each operator in turn
|
|
do {
|
|
operator = {};
|
|
// Check for an operator prefix
|
|
if(filterString[p] === "!") {
|
|
operator.prefix = filterString[p++];
|
|
}
|
|
// Get the operator name
|
|
bracketPos = filterString.indexOf("[",p);
|
|
if(bracketPos === -1) {
|
|
throw "Missing [ in filter expression";
|
|
}
|
|
operator.operator = filterString.substring(p,bracketPos);
|
|
if(operator.operator === "") {
|
|
operator.operator = "title";
|
|
}
|
|
p = bracketPos + 1;
|
|
// Get the operand
|
|
bracketPos = filterString.indexOf("]",p);
|
|
if(bracketPos === -1) {
|
|
throw "Missing ] in filter expression";
|
|
}
|
|
operator.operand = filterString.substring(p,bracketPos);
|
|
p = bracketPos + 1;
|
|
// Push this operator
|
|
operators.push(operator);
|
|
} while(filterString[p] !== "]");
|
|
// Skip the ending square bracket
|
|
if(filterString[p++] !== "]") {
|
|
throw "Missing ] in filter expression";
|
|
}
|
|
// Return the parsing position
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
Parse a filter string
|
|
*/
|
|
exports.parseFilter = function(filterString) {
|
|
filterString = filterString || "";
|
|
var results = [], // Array of arrays of operator nodes {operator:,operand:}
|
|
p = 0, // Current position in the filter string
|
|
match;
|
|
var whitespaceRegExp = /(\s+)/mg,
|
|
operandRegExp = /((?:\+|\-)?)(?:(\[)|("(?:[^"])*")|('(?:[^'])*')|([^\s\[\]]+))/mg;
|
|
while(p < filterString.length) {
|
|
// Skip any whitespace
|
|
whitespaceRegExp.lastIndex = p;
|
|
match = whitespaceRegExp.exec(filterString);
|
|
if(match && match.index === p) {
|
|
p = p + match[0].length;
|
|
}
|
|
// Match the start of the operation
|
|
if(p < filterString.length) {
|
|
operandRegExp.lastIndex = p;
|
|
match = operandRegExp.exec(filterString);
|
|
if(!match || match.index !== p) {
|
|
throw "Syntax error in filter expression";
|
|
}
|
|
var operation = {
|
|
prefix: "",
|
|
operators: []
|
|
};
|
|
if(match[1]) {
|
|
operation.prefix = match[1];
|
|
p++;
|
|
}
|
|
if(match[2]) { // Opening square bracket
|
|
p = parseFilterOperation(operation.operators,filterString,p);
|
|
} else {
|
|
p = match.index + match[0].length;
|
|
}
|
|
if(match[3] || match[4] || match[5]) { // Double quoted string, single quoted string or unquoted title
|
|
operation.operators.push(
|
|
{operator: "title", operand: match[3] || match[4] || match[5]}
|
|
);
|
|
}
|
|
results.push(operation);
|
|
}
|
|
}
|
|
return results;
|
|
};
|
|
|
|
})();
|