| /* |
| * This file is part of the DOM implementation for WebCore. |
| * |
| * Copyright (C) 2006 Apple Computer, Inc. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_MARKERS_DOCUMENT_MARKER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_MARKERS_DOCUMENT_MARKER_H_ |
| |
| #include "base/optional.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/platform/graphics/color.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h" |
| #include "third_party/blink/renderer/platform/wtf/vector_traits.h" |
| |
| namespace blink { |
| |
| // A range of a node within a document that is "marked", such as the range of a |
| // misspelled word. It optionally includes a description that could be displayed |
| // in the user interface. |
| class CORE_EXPORT DocumentMarker : public GarbageCollected<DocumentMarker> { |
| public: |
| enum MarkerTypeIndex { |
| kSpellingMarkerIndex = 0, |
| kGrammarMarkerIndex, |
| kTextMatchMarkerIndex, |
| kCompositionMarkerIndex, |
| kActiveSuggestionMarkerIndex, |
| kSuggestionMarkerIndex, |
| kTextFragmentMarkerIndex, |
| kMarkerTypeIndexesCount |
| }; |
| |
| enum MarkerType { |
| kSpelling = 1 << kSpellingMarkerIndex, |
| kGrammar = 1 << kGrammarMarkerIndex, |
| kTextMatch = 1 << kTextMatchMarkerIndex, |
| kComposition = 1 << kCompositionMarkerIndex, |
| kActiveSuggestion = 1 << kActiveSuggestionMarkerIndex, |
| kSuggestion = 1 << kSuggestionMarkerIndex, |
| kTextFragment = 1 << kTextFragmentMarkerIndex, |
| }; |
| |
| class MarkerTypesIterator |
| : public std::iterator<std::forward_iterator_tag, MarkerType> { |
| public: |
| explicit MarkerTypesIterator(unsigned marker_types) |
| : remaining_types_(marker_types) {} |
| MarkerTypesIterator(const MarkerTypesIterator& other) = default; |
| |
| bool operator==(const MarkerTypesIterator& other) { |
| return remaining_types_ == other.remaining_types_; |
| } |
| bool operator!=(const MarkerTypesIterator& other) { |
| return !operator==(other); |
| } |
| |
| MarkerTypesIterator& operator++() { |
| DCHECK(remaining_types_); |
| // Turn off least significant 1-bit (from Hacker's Delight 2-1) |
| // Example: |
| // 7: 7 & 6 = 6 |
| // 6: 6 & 5 = 4 |
| // 4: 4 & 3 = 0 |
| remaining_types_ &= (remaining_types_ - 1); |
| return *this; |
| } |
| |
| MarkerType operator*() const { |
| DCHECK(remaining_types_); |
| // Isolate least significant 1-bit (from Hacker's Delight 2-1) |
| // Example: |
| // 7: 7 & -7 = 1 |
| // 6: 6 & -6 = 2 |
| // 4: 4 & -4 = 4 |
| return static_cast<MarkerType>(remaining_types_ & |
| (~remaining_types_ + 1)); |
| } |
| |
| private: |
| unsigned remaining_types_; |
| }; |
| |
| class MarkerTypes { |
| DISALLOW_NEW(); |
| |
| public: |
| explicit MarkerTypes(unsigned mask = 0) : mask_(mask) {} |
| |
| static MarkerTypes All() { |
| return MarkerTypes((1 << kMarkerTypeIndexesCount) - 1); |
| } |
| |
| static MarkerTypes AllBut(const MarkerTypes& types) { |
| return MarkerTypes(All().mask_ & ~types.mask_); |
| } |
| |
| static MarkerTypes ActiveSuggestion() { |
| return MarkerTypes(kActiveSuggestion); |
| } |
| static MarkerTypes Composition() { return MarkerTypes(kComposition); } |
| static MarkerTypes Grammar() { return MarkerTypes(kGrammar); } |
| static MarkerTypes Misspelling() { |
| return MarkerTypes(kSpelling | kGrammar); |
| } |
| static MarkerTypes Spelling() { return MarkerTypes(kSpelling); } |
| static MarkerTypes TextMatch() { return MarkerTypes(kTextMatch); } |
| static MarkerTypes Suggestion() { return MarkerTypes(kSuggestion); } |
| static MarkerTypes TextFragment() { return MarkerTypes(kTextFragment); } |
| |
| bool Contains(MarkerType type) const { return mask_ & type; } |
| bool Intersects(const MarkerTypes& types) const { |
| return (mask_ & types.mask_); |
| } |
| bool operator==(const MarkerTypes& other) const { |
| return mask_ == other.mask_; |
| } |
| |
| MarkerTypes Add(const MarkerTypes& types) const { |
| return MarkerTypes(mask_ | types.mask_); |
| } |
| |
| MarkerTypesIterator begin() const { return MarkerTypesIterator(mask_); } |
| MarkerTypesIterator end() const { return MarkerTypesIterator(0); } |
| |
| private: |
| unsigned mask_; |
| }; |
| |
| virtual ~DocumentMarker(); |
| |
| virtual MarkerType GetType() const = 0; |
| unsigned StartOffset() const { return start_offset_; } |
| unsigned EndOffset() const { return end_offset_; } |
| |
| struct MarkerOffsets { |
| unsigned start_offset; |
| unsigned end_offset; |
| }; |
| |
| base::Optional<MarkerOffsets> ComputeOffsetsAfterShift( |
| unsigned offset, |
| unsigned old_length, |
| unsigned new_length) const; |
| |
| // Offset modifications are done by DocumentMarkerController. |
| // Other classes should not call following setters. |
| void SetStartOffset(unsigned offset) { start_offset_ = offset; } |
| void SetEndOffset(unsigned offset) { end_offset_ = offset; } |
| void ShiftOffsets(int delta); |
| |
| virtual void Trace(Visitor* visitor) const {} |
| |
| protected: |
| DocumentMarker(unsigned start_offset, unsigned end_offset); |
| |
| private: |
| unsigned start_offset_; |
| unsigned end_offset_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DocumentMarker); |
| }; |
| |
| using DocumentMarkerVector = HeapVector<Member<DocumentMarker>>; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_MARKERS_DOCUMENT_MARKER_H_ |