Acquired Opera AdBlock code

files/parse.js

Index: files/parse.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/files/parse.js
@@ -0,0 +1,106 @@
+const parse = {
+	adblock: function(content, add) {
+		var url = this.wildcard(content.replace(/^@@/, '').replace(/\$.*$/, ''));
+		var option = undefined;
+		if(content.match(/\$/)) { //Is a type-specific rule
+			option = this.options(content.split('$')[1].split(','));
+		}
+		
+		if(content.match(/^@@/)) {
+			if(add)
+				opera.extension.urlfilter.allow.add(url, option);
+			else
+				opera.extension.urlfilter.allow.remove(url, option);
+		}
+		else {
+			if(add)
+				opera.extension.urlfilter.block.add(url, option);
+			else
+				opera.extension.urlfilter.block.remove(url, option);
+		}
+	},
+	adblockOld: function(content, add) { //Parsing of the content for older versions of Opera
+		if(!content.match(/^@@/)) { //Whitelist is not supported 
+			var url = this.sepCharacters([this.wildcard(content.replace(/\$.*$/, ''))]); //Removes the special rules as those are not supported on older versions of Opera
+			if(add)
+				for(i in url)
+					opera.extension.urlfilter.block.add(url[i]);
+			else
+				for(i in url)
+					opera.extension.urlfilter.block.remove(url[i]);
+		}
+	},
+	map: {
+		'script': opera.extension.urlfilter.RESOURCE_SCRIPT,
+		'image': opera.extension.urlfilter.RESOURCE_IMAGE,
+		'stylesheet': opera.extension.urlfilter.RESOURCE_STYLESHEET,
+		'object': opera.extension.urlfilter.RESOURCE_OBJECT,
+		'xmlhttprequest': opera.extension.urlfilter.RESOURCE_XMLHTTPREQUEST,
+		'object-subrequest': opera.extension.urlfilter.RESOURCE_OBJECT_SUBREQUEST,
+		'subdocument': opera.extension.urlfilter.RESOURCE_SUBDOCUMENT,
+		'document': opera.extension.urlfilter.RESOURCE_DOCUMENT,
+		//'refresh': opera.extension.urlfilter.RESOURCE_REFRESH,
+		//'media': opera.extension.urlfilter.RESOURCE_MEDIA,
+		//'font': opera.extension.urlfilter.RESOURCE_FONT,
+		'other': opera.extension.urlfilter.RESOURCE_OTHER,
+		'all': opera.extension.urlfilter.RESOURCE_SCRIPT | opera.extension.urlfilter.RESOURCE_IMAGE | opera.extension.urlfilter.RESOURCE_STYLESHEET | opera.extension.urlfilter.RESOURCE_OBJECT |
+			opera.extension.urlfilter.RESOURCE_XMLHTTPREQUEST | opera.extension.urlfilter.RESOURCE_OBJECT_SUBREQUEST | opera.extension.urlfilter.RESOURCE_SUBDOCUMENT | opera.extension.urlfilter.RESOURCE_DOCUMENT |
+			opera.extension.urlfilter.RESOURCE_REFRESH | opera.extension.urlfilter.RESOURCE_MEDIA | opera.extension.urlfilter.RESOURCE_FONT | opera.extension.urlfilter.RESOURCE_OTHER
+	},
+	options: function(special) {
+		var option = {excludeDomains: [], includeDomains: [], resources: this.map['all']};
+		var additive = false;
+		for(i in special) {
+			var element = special[i];
+			if(element.match(/^domain/i) == 0) { //TESTED
+				var domains = special[i].split('=')[1].split(',');
+				for(j in domains) {
+					if(domains[j].match(/^~/)) //Don't apply on this website
+						option['excludeDomains'].push(domains[j]);
+					else //Apply on this website
+						option['includeDomains'].push(domains[j]);
+				}
+			}
+			else if(!element.match(/^elemhide/i)) { //No support for ElemHide - TESTED
+				if(!element.match(/^~/i)) {
+					if(!additive) {
+						additive = true;
+						option['resources'] = 0;
+					}
+					option['resources'] += this.map[element];
+				}
+				else if(!additive)
+					option['resources'] -= this.map[element];
+			}
+		}
+		return option;
+	},
+	wildcard: function(url) { //TESTED
+		//| at the beginning or end means no wildcard
+		if(!url.match(/^\|\|/)) { //Does not starts with ||
+			if(url.match(/^\|/)) //Starts with |
+				url = url.replace(/^\|/, ''); //Remove the |
+			else if(!url.match(/^\*/)) //Avoid **
+				url = '*' + url; //Add the wildcard
+		}
+		if(url.match(/\|$/)) //Ends with |
+			url =  url.replace(/\|$/, ''); //Remove the |
+		else if(!url.match(/\*$/)) //Avoid **
+			url = url + '*'; //Add the wildcard
+		
+		return url;
+	},
+	sepCharacters: function(value) { //Separator charactor not supported in <12.1
+		//var characters = '(){}[],;:!?/|\\"\'#$&*+<=>@^`~'; //WARNING: Using the longer list WILL freeze the browser in some instances
+		var characters = ':?/#&='; //Shorter string to avoid over-processing
+		var values = new Array();
+		for(i in value) {
+			for(j in characters) {
+				values.push(value[i].replace(/\^/, characters[j]));
+			}
+			if(values[0].match(/\^/))
+				return this.sepCharacters(values);
+		}
+		return values;
+	}
+};