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Issue 29587914: Issue 5142 - Convert Element Hiding to C++ (Closed) Base URL: https://hg.adblockplus.org/adblockpluscore/
Patch Set: Added OwnedStringMap to address ownership of keys Created Nov. 25, 2017, 3:22 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 text as key
71 StringSet mUnconditionalSelectors;
72
73 mutable intrusive_ptr<ElemHide_SelectorList> mUnconditionalSelectorsCache;
74
75 static ElemHide* mInstance;
76 public:
77 enum Criteria
78 {
79 ALL_MATCHING = 0,
80 NO_UNCONDITIONAL = 1,
81 SPECIFIC_ONLY = 2,
82 };
83
84 static ElemHide* BINDINGS_EXPORTED GetInstance()
85 {
86 return mInstance;
87 }
88
89 void BINDINGS_EXPORTED Clear();
90 void BINDINGS_EXPORTED Add(ElemHideBase& filter);
91 void BINDINGS_EXPORTED Remove(ElemHideBase& filter);
92
93 ElemHide_SelectorList* BINDINGS_EXPORTED GetSelectorsForDomain(const String& d omain,
94 Criteria criter ia) const;
95 ElemHide_SelectorList* BINDINGS_EXPORTED GetUnconditionalSelectors() const;
96
97 ElemHideException* BINDINGS_EXPORTED GetException(const ElemHideBase& filter,
98 DependentString& docDomain) const;
99
100 private:
101 void AddToFiltersByDomain(ElemHideBase& filter);
102 };
103
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