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Code Issues Releases Wiki Activity

Added limit filter operator

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Jeremy Ruston 2012-05-09 09:40:10 +01:00
parent d99b70e0b2
commit cfcb255c23
1 changed files with 12 additions and 0 deletions
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12
core/modules/wiki.filters.js
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@ -31,6 +31,8 @@ The operators look like `[operator[operand]]`, where `operator` is one of:
* ''title'': selects the tiddler with the title given in the operand
* ''is'': tests whether a tiddler is a member of the system defined set named in the operand (see below)
* ''has'': tests whether a tiddler has a specified field
* ''sort'': sorts the tiddlers by a given field
* ''limit'': limits the number of subresults
* ''tag'': tests whether a given tag is (`[tag[mytag]]`) or is not (`[!tag[mytag]]`) present on the tiddler
* ''<field>'': tests whether a tiddler field has a specified value (`[modifier[Jeremy]]`) or not (`[!modifier[Jeremy]]`)
@ -192,6 +194,16 @@ exports.operators = {
return "this.sortTiddlers(subResults,\"" + $tw.utils.stringify(operator.operand) + "\"," + desc + ");";
}
},
"limit": {
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 + ");}";
}
},
"field": {
selector: function(operator) {
var op = operator.prefix === "!" ? "!" : "=";