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Issue 29587914: Issue 5142 - Convert Element Hiding to C++ (Closed) Base URL: https://hg.adblockplus.org/adblockpluscore/
Patch Set: Fixed leaks in test. Extracted changes to string and string map. Created Jan. 22, 2018, 4:48 p.m.
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1 /*
2 * This file is part of Adblock Plus <https://adblockplus.org/>,
3 * Copyright (C) 2006-present eyeo GmbH
4 *
5 * Adblock Plus is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 3 as
7 * published by the Free Software Foundation.
8 *
9 * Adblock Plus is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 /**
19 * @fileOverview Element hiding implementation.
20 */
21
22 #pragma once
23
24 #include <unordered_map>
25 #include <vector>
26
27 #include "bindings/runtime.h"
28 #include "intrusive_ptr.h"
29 #include "StringMap.h"
30 #include "filter/Filter.h"
31 #include "filter/ElemHideBase.h"
32 #include "filter/ElemHideException.h"
33
34 class ElemHide_SelectorList : public ref_counted
35 {
36 std::vector<ElemHideBasePtr> mSelectors;
37 public:
38 size_t BINDINGS_EXPORTED GetSelectorCount() const
39 {
40 return mSelectors.size();
41 }
42 OwnedString BINDINGS_EXPORTED SelectorAt(size_t idx) const;
43 const String& BINDINGS_EXPORTED FilterKeyAt(size_t idx) const;
44
45 void push_back(const ElemHideBasePtr& filter)
46 {
47 mSelectors.push_back(filter);
48 }
49
50 void append(const ElemHide_SelectorList& list)
51 {
52 mSelectors.insert(mSelectors.end(),
53 list.mSelectors.cbegin(), list.mSelectors.cend());
54 }
55 };
56
57 class ElemHide : public ref_counted
58 {
59 // All filters. Key is filter text. Exception filters excluded.
60 StringMap<ElemHideBasePtr> mFilters;
61 // StringMap is non copyable. std::unordered_map<> it is
62 // Filters by domain. Key is domain. Subkey is filter text.
63 StringMap<std::unordered_map<DependentString,ElemHideBasePtr,StringHash>> mFil tersByDomain;
64
65 // Exceptions. The key is the selector.
66 OwnedStringMap<std::vector<ElemHideExceptionPtr>> mExceptions;
67 // Known exceptions. Filter text as keys.
68 StringSet mKnownExceptions;
69
70 // Unconditional selectors. Filter selector as key. Text as value.
71 OwnedStringMap<DependentString> mUnconditionalSelectors;
72
73 mutable intrusive_ptr<ElemHide_SelectorList> mUnconditionalSelectorsCache;
74
75 public:
76 static ElemHide* BINDINGS_EXPORTED Create()
77 {
78 return new ElemHide();
79 }
80 // Used by GetSelectorsForDomain to narrow down selectors to return.
81 // Keep these value up to date in the ElemHide.js import script.
82 enum Criteria
83 {
84 // Return all selectors applying to a particular hostname.
85 ALL_MATCHING = 0,
86 // Exclude selectors which apply to all websites without exception.
87 NO_UNCONDITIONAL = 1,
88 // Return only selectors for filters which specifically match the
89 // given host name.
90 SPECIFIC_ONLY = 2,
91 };
92
93 void BINDINGS_EXPORTED Clear();
94 void BINDINGS_EXPORTED Add(ElemHideBase& filter);
95 void BINDINGS_EXPORTED Remove(ElemHideBase& filter);
96
97 ElemHide_SelectorList* BINDINGS_EXPORTED GetSelectorsForDomain(const String& d omain,
98 Criteria criter ia) const;
99 ElemHide_SelectorList* BINDINGS_EXPORTED GetUnconditionalSelectors() const;
100
101 ElemHideException* BINDINGS_EXPORTED GetException(const ElemHideBase& filter,
102 DependentString& docDomain) const;
103
104 private:
105 static const ActiveFilter::DomainMap defaultDomains;
106 void AddToFiltersByDomain(ElemHideBase& filter);
107 };
108
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