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87 lines
2.4 KiB
87 lines
2.4 KiB
var ElementType = require("domelementtype");
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var isTag = exports.isTag = ElementType.isTag;
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exports.testElement = function(options, element){
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for(var key in options){
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if(!options.hasOwnProperty(key));
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else if(key === "tag_name"){
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if(!isTag(element) || !options.tag_name(element.name)){
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return false;
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}
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} else if(key === "tag_type"){
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if(!options.tag_type(element.type)) return false;
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} else if(key === "tag_contains"){
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if(isTag(element) || !options.tag_contains(element.data)){
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return false;
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}
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} else if(!element.attribs || !options[key](element.attribs[key])){
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return false;
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}
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}
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return true;
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};
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var Checks = {
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tag_name: function(name){
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if(typeof name === "function"){
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return function(elem){ return isTag(elem) && name(elem.name); };
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} else if(name === "*"){
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return isTag;
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} else {
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return function(elem){ return isTag(elem) && elem.name === name; };
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}
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},
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tag_type: function(type){
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if(typeof type === "function"){
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return function(elem){ return type(elem.type); };
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} else {
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return function(elem){ return elem.type === type; };
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}
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},
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tag_contains: function(data){
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if(typeof data === "function"){
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return function(elem){ return !isTag(elem) && data(elem.data); };
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} else {
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return function(elem){ return !isTag(elem) && elem.data === data; };
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}
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}
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};
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function getAttribCheck(attrib, value){
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if(typeof value === "function"){
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return function(elem){ return elem.attribs && value(elem.attribs[attrib]); };
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} else {
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return function(elem){ return elem.attribs && elem.attribs[attrib] === value; };
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}
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}
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function combineFuncs(a, b){
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return function(elem){
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return a(elem) || b(elem);
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};
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}
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exports.getElements = function(options, element, recurse, limit){
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var funcs = Object.keys(options).map(function(key){
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var value = options[key];
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return key in Checks ? Checks[key](value) : getAttribCheck(key, value);
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});
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return funcs.length === 0 ? [] : this.filter(
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funcs.reduce(combineFuncs),
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element, recurse, limit
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);
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};
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exports.getElementById = function(id, element, recurse){
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if(!Array.isArray(element)) element = [element];
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return this.findOne(getAttribCheck("id", id), element, recurse !== false);
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};
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exports.getElementsByTagName = function(name, element, recurse, limit){
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return this.filter(Checks.tag_name(name), element, recurse, limit);
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};
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exports.getElementsByTagType = function(type, element, recurse, limit){
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return this.filter(Checks.tag_type(type), element, recurse, limit);
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};
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