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Re-arrange parsing of type options to be order-independent

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Related commit:
- 1888033070

This removes the need to place `all` before any negated
type in the list of options.
This commit is contained in:
Raymond Hill 2019-05-21 14:04:21 -04:00
parent 5b47a06cbe
commit 32b04fa262
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GPG key ID: 25E1490B761470C2
1 changed files with 44 additions and 42 deletions
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86
src/js/static-net-filtering.js
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@ -1872,6 +1872,7 @@ FilterParser.prototype.reset = function() {
this.tokenHash = this.noTokenHash;
this.tokenBeg = 0;
this.types = 0;
this.notTypes = 0;
this.important = 0;
this.wildcarded = false;
this.unsupported = false;
@ -1894,26 +1895,11 @@ FilterParser.prototype.parseTypeOption = function(raw, not) {
? this.bitFromType(this.toNormalizedType[raw])
: allTypesBits;
if ( !not ) {
if ( not ) {
this.notTypes |= typeBit;
} else {
this.types |= typeBit;
return;
}
// Non-network types can only toggle themselves.
if ( (typeBit & allNetworkTypesBits) === 0 ) {
this.types &= ~typeBit;
return;
}
// Negated network type: the first negation imply all network types are
// toggled on.
if (
(typeBit & allNetworkTypesBits) !== 0 &&
(this.types & allNetworkTypesBits) === 0
) {
this.types |= allNetworkTypesBits;
}
this.types &= ~typeBit;
};
/******************************************************************************/
@ -1952,11 +1938,10 @@ FilterParser.prototype.parseDomainOption = function(s) {
FilterParser.prototype.parseOptions = function(s) {
this.fopts = s;
var opts = s.split(',');
var opt, not;
const opts = s.split(',');
for ( var i = 0; i < opts.length; i++ ) {
opt = opts[i];
not = opt.startsWith('~');
let opt = opts[i];
const not = opt.startsWith('~');
if ( not ) {
opt = opt.slice(1);
}
@ -2034,6 +2019,32 @@ FilterParser.prototype.parseOptions = function(s) {
this.unsupported = true;
break;
}
// Negated network types? Toggle on all network type bits.
if ( (this.notTypes & allNetworkTypesBits) !== 0 ) {
this.types |= allNetworkTypesBits & ~this.notTypes;
if ( this.types === 0 ) {
this.unsupported = true;
}
}
// Negated non-network types can only toggle themselves.
if ( this.notTypes !== 0 ) {
this.types &= ~this.notTypes;
if ( this.types === 0 ) {
this.unsupported = true;
}
}
// https://github.com/gorhill/uBlock/issues/2283
// Abort if type is only for unsupported types, otherwise
// toggle off `unsupported` bit.
if ( this.types & unsupportedTypeBit ) {
this.types &= ~unsupportedTypeBit;
if ( this.types === 0 ) {
this.unsupported = true;
}
}
};
/*******************************************************************************
@ -2094,16 +2105,7 @@ FilterParser.prototype.parse = function(raw) {
return this;
}
this.parseOptions(s.slice(pos + 1));
// https://github.com/gorhill/uBlock/issues/2283
// Abort if type is only for unsupported types, otherwise
// toggle off `unsupported` bit.
if ( this.types & unsupportedTypeBit ) {
this.types &= ~unsupportedTypeBit;
if ( this.types === 0 ) {
this.unsupported = true;
return this;
}
}
if ( this.unsupported ) { return this; }
s = s.slice(0, pos);
}
}
@ -2743,30 +2745,30 @@ FilterContainer.prototype.compileToAtomicFilter = function(
writer.select(0);
}
let descBits = parsed.action | parsed.important | parsed.party;
let type = parsed.types;
const descBits = parsed.action | parsed.important | parsed.party;
let typeBits = parsed.types;
// Typeless
if ( type === 0 ) {
if ( typeBits === 0 ) {
writer.push([ descBits, parsed.tokenHash, fdata ]);
return;
}
// If all network types are set, just use `no_type`.
if ( (type & allNetworkTypesBits) === allNetworkTypesBits ) {
// If all network types are set, create a typeless filter
if ( (typeBits & allNetworkTypesBits) === allNetworkTypesBits ) {
writer.push([ descBits, parsed.tokenHash, fdata ]);
type &= ~allNetworkTypesBits;
typeBits &= ~allNetworkTypesBits;
}
// Specific type(s)
// One filter per specific types
let bitOffset = 1;
do {
if ( type & 1 ) {
if ( typeBits & 1 ) {
writer.push([ descBits | (bitOffset << 4), parsed.tokenHash, fdata ]);
}
bitOffset += 1;
type >>>= 1;
} while ( type !== 0 );
typeBits >>>= 1;
} while ( typeBits !== 0 );
// Only static filter with an explicit type can be redirected. If we reach
// this point, it's because there is one or more explicit type.