| /* |
| * Copyright (C) 2010, Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_POSITION_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_POSITION_H_ |
| |
| #include <memory> |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/assertions.h" |
| #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| #include "third_party/blink/renderer/platform/wtf/wtf_export.h" |
| #include "third_party/blink/renderer/platform/wtf/wtf_size_t.h" |
| |
| namespace WTF { |
| |
| // An abstract number of element in a sequence. The sequence has a first |
| // element. This type should be used instead of integer because 2 |
| // contradicting traditions can call a first element '0' or '1' which makes |
| // integer type ambiguous. |
| class OrdinalNumber final { |
| DISALLOW_NEW(); |
| |
| public: |
| static OrdinalNumber FromZeroBasedInt(int zero_based_int) { |
| return OrdinalNumber(zero_based_int); |
| } |
| static OrdinalNumber FromOneBasedInt(int one_based_int) { |
| return OrdinalNumber(one_based_int - 1); |
| } |
| OrdinalNumber() : zero_based_value_(0) {} |
| |
| int ZeroBasedInt() const { return zero_based_value_; } |
| int OneBasedInt() const { return zero_based_value_ + 1; } |
| |
| bool operator==(OrdinalNumber other) const { |
| return zero_based_value_ == other.zero_based_value_; |
| } |
| bool operator!=(OrdinalNumber other) const { return !((*this) == other); } |
| |
| static OrdinalNumber First() { return OrdinalNumber(0); } |
| static OrdinalNumber BeforeFirst() { return OrdinalNumber(-1); } |
| |
| private: |
| OrdinalNumber(int zero_based_int) : zero_based_value_(zero_based_int) {} |
| int zero_based_value_; |
| }; |
| |
| // TextPosition structure specifies coordinates within an text resource. It is |
| // used mostly |
| // for saving script source position. |
| class TextPosition final { |
| DISALLOW_NEW(); |
| |
| public: |
| TextPosition(OrdinalNumber line, OrdinalNumber column) |
| : line_(line), column_(column) {} |
| TextPosition() = default; |
| bool operator==(const TextPosition& other) const { |
| return line_ == other.line_ && column_ == other.column_; |
| } |
| bool operator!=(const TextPosition& other) const { |
| return !((*this) == other); |
| } |
| WTF_EXPORT OrdinalNumber ToOffset(const Vector<unsigned>&); |
| |
| // A 'minimum' value of position, used as a default value. |
| static TextPosition MinimumPosition() { |
| return TextPosition(OrdinalNumber::First(), OrdinalNumber::First()); |
| } |
| |
| // A value with line value less than a minimum; used as an impossible |
| // position. |
| static TextPosition BelowRangePosition() { |
| return TextPosition(OrdinalNumber::BeforeFirst(), |
| OrdinalNumber::BeforeFirst()); |
| } |
| |
| // A value corresponding to a position with given offset within text having |
| // the specified line ending offsets. |
| WTF_EXPORT static TextPosition FromOffsetAndLineEndings( |
| unsigned, |
| const Vector<unsigned>&); |
| |
| OrdinalNumber line_; |
| OrdinalNumber column_; |
| }; |
| |
| WTF_EXPORT std::unique_ptr<Vector<wtf_size_t>> GetLineEndings(const String&); |
| |
| } // namespace WTF |
| |
| using WTF::OrdinalNumber; |
| |
| using WTF::TextPosition; |
| |
| using WTF::GetLineEndings; |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_POSITION_H_ |