dan/node-html-parser
1
0
Fork 0
mirror of https://github.com/danbulant/node-html-parser synced 2026-06-18 22:21:24 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge pull request #2 from jnarowski/master

Browse source 
eliminated dependence on new Function
This commit is contained in:
taoqf 2018-11-12 14:10:06 +08:00 committed by GitHub
commit 50cbc8ebd4
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 2967 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2833
package-lock.json generated Normal file
View file

File diff suppressed because it is too large Load diff

147
src/index.ts Normal file → Executable file
View file

@ -452,15 +452,118 @@ export class HTMLElement extends Node {
} }
} }
interface MatherFunction { interface MatherFunction { func: any; tagName: string; classes: string | string[]; attr_key: any; value: any; }
(el: Node): boolean;
}
/** /**
* Cache to store generated match functions * Cache to store generated match functions
* @type {Object} * @type {Object}
*/ */
let pMatchFunctionCache = {} as { [name: string]: MatherFunction }; let pMatchFunctionCache = {} as { [name: string]: MatherFunction };
/**
* Function cache
*/
let functionCache = {
"f145":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
if (el.id != tagName.substr(1)) return false;
for (var cls = classes, i = 0; i < cls.length; i++) if (el.classNames.indexOf(cls[i]) === -1) return false;
return true;
},
"f45":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
for (var cls = classes, i = 0; i < cls.length; i++) if (el.classNames.indexOf(cls[i]) === -1) return false;
return true;
},
"f15":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
if (el.id != tagName.substr(1)) return false;
return true;
},
"f1":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
if (el.id != tagName.substr(1)) return false;
},
"f5":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
el = el||{};
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
return true;
},
"f245":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
var attrs = el.attributes;for (var key in attrs){const val = attrs[key]; if (key == attr_key && val == value){return true;}} return false;
// for (var cls = classes, i = 0; i < cls.length; i++) {if (el.classNames.indexOf(cls[i]) === -1){ return false;}}
// return true;
},
"f25":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
var attrs = el.attributes;for (var key in attrs){const val = attrs[key]; if (key == attr_key && val == value){return true;}} return false;
//return true;
},
"f2":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
var attrs = el.attributes;for (var key in attrs){const val = attrs[key]; if (key == attr_key && val == value){return true;}} return false;
},
"f345":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
if (el.tagName != tagName) return false;
for (var cls = classes, i = 0; i < cls.length; i++) if (el.classNames.indexOf(cls[i]) === -1) return false;
return true;
},
"f35":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
if (el.tagName != tagName) return false;
return true;
},
"f3":function(el: any,tagName: string,classes: any[],attr_key: string,value: string){
"use strict";
tagName = tagName||"";
classes = classes||[];
attr_key = attr_key||"";
value = value||"";
if (el.tagName != tagName) return false;
}
}
/** /**
* Matcher class to make CSS match * Matcher class to make CSS match
* *
@ -476,6 +579,7 @@ export class Matcher {
* @memberof Matcher * @memberof Matcher
*/ */
constructor(selector: string) { constructor(selector: string) {
functionCache["f5"] = functionCache["f5"];
this.matchers = selector.split(' ').map((matcher) => { this.matchers = selector.split(' ').map((matcher) => {
if (pMatchFunctionCache[matcher]) if (pMatchFunctionCache[matcher])
return pMatchFunctionCache[matcher]; return pMatchFunctionCache[matcher];
@ -483,12 +587,16 @@ export class Matcher {
const tagName = parts[0]; const tagName = parts[0];
const classes = parts.slice(1).sort(); const classes = parts.slice(1).sort();
let source = '"use strict";'; let source = '"use strict";';
let function_name = 'f';
let attr_key = "";
let value = "";
if (tagName && tagName != '*') { if (tagName && tagName != '*') {
let matcher: RegExpMatchArray; let matcher: RegExpMatchArray;
if (tagName[0] == '#') { if (tagName[0] == '#') {
source += 'if (el.id != ' + JSON.stringify(tagName.substr(1)) + ') return false;'; source += 'if (el.id != ' + JSON.stringify(tagName.substr(1)) + ') return false;';//1
function_name += '1';
} else if (matcher = tagName.match(/^\[\s*(\S+)\s*(=|!=)\s*((((["'])([^\6]*)\6))|(\S*?))\]\s*/)) { } else if (matcher = tagName.match(/^\[\s*(\S+)\s*(=|!=)\s*((((["'])([^\6]*)\6))|(\S*?))\]\s*/)) {
const attr_key = matcher[1]; attr_key = matcher[1];
let method = matcher[2]; let method = matcher[2];
if (method !== '=' && method !== '!=') { if (method !== '=' && method !== '!=') {
throw new Error('Selector not supported, Expect [key${op}value].op must be =,!='); throw new Error('Selector not supported, Expect [key${op}value].op must be =,!=');
@ -496,17 +604,30 @@ export class Matcher {
if (method === '=') { if (method === '=') {
method = '=='; method = '==';
} }
const value = matcher[7] || matcher[8]; value = matcher[7] || matcher[8];
source += `var attrs = el.attributes;for (var key in attrs){const val = attrs[key]; if (key == "${attr_key}" && val ${method} "${value}"){return true;}} return false;`;
source += `var attrs = el.attributes;for (var key in attrs){const val = attrs[key]; if (key == "${attr_key}" && val == "${value}"){return true;}} return false;`;//2
function_name += '2';
} else { } else {
source += 'if (el.tagName != ' + JSON.stringify(tagName) + ') return false;'; source += 'if (el.tagName != ' + JSON.stringify(tagName) + ') return false;';//3
function_name += '3';
} }
} }
if (classes.length > 0) { if (classes.length > 0) {
source += 'for (var cls = ' + JSON.stringify(classes) + ', i = 0; i < cls.length; i++) if (el.classNames.indexOf(cls[i]) === -1) return false;'; source += 'for (var cls = ' + JSON.stringify(classes) + ', i = 0; i < cls.length; i++) if (el.classNames.indexOf(cls[i]) === -1) return false;';//4
function_name += '4';
} }
source += 'return true;'; source += 'return true;';//5
return pMatchFunctionCache[matcher] = new Function('el', source) as MatherFunction; function_name += '5';
let obj = {
func : functionCache[function_name],
tagName: tagName||"",
classes : classes||"",
attr_key : attr_key||"",
value : value||""
}
source = source||"";
return pMatchFunctionCache[matcher] = obj as MatherFunction;
}); });
} }
/** /**
@ -516,7 +637,7 @@ export class Matcher {
*/ */
advance(el: Node) { advance(el: Node) {
if (this.nextMatch < this.matchers.length && if (this.nextMatch < this.matchers.length &&
this.matchers[this.nextMatch](el)) { this.matchers[this.nextMatch].func(el,this.matchers[this.nextMatch].tagName,this.matchers[this.nextMatch].classes,this.matchers[this.nextMatch].attr_key,this.matchers[this.nextMatch].value)) {
this.nextMatch++; this.nextMatch++;
return true; return true;
} }
@ -677,4 +798,4 @@ export function parse(data: string, options?: {
} }
} }
return root; return root;
} }