| /* |
| * Copyright (C) 2011 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: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT |
| * OWNER OR 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. |
| */ |
| |
| #include "core/editing/markers/DocumentMarker.h" |
| |
| #include "core/editing/markers/TextMatchMarker.h" |
| #include "platform/wtf/StdLibExtras.h" |
| |
| namespace blink { |
| |
| DocumentMarkerDetails::~DocumentMarkerDetails() {} |
| |
| class DocumentMarkerDescription final : public DocumentMarkerDetails { |
| public: |
| static DocumentMarkerDescription* Create(const String&); |
| |
| const String& Description() const { return description_; } |
| bool IsDescription() const override { return true; } |
| |
| private: |
| explicit DocumentMarkerDescription(const String& description) |
| : description_(description) {} |
| |
| String description_; |
| }; |
| |
| DocumentMarkerDescription* DocumentMarkerDescription::Create( |
| const String& description) { |
| return new DocumentMarkerDescription(description); |
| } |
| |
| inline DocumentMarkerDescription* ToDocumentMarkerDescription( |
| DocumentMarkerDetails* details) { |
| if (details && details->IsDescription()) |
| return static_cast<DocumentMarkerDescription*>(details); |
| return 0; |
| } |
| |
| class TextCompositionMarkerDetails final : public DocumentMarkerDetails { |
| public: |
| static TextCompositionMarkerDetails* Create(Color underline_color, |
| bool thick, |
| Color background_color); |
| |
| bool IsComposition() const override { return true; } |
| Color UnderlineColor() const { return underline_color_; } |
| bool Thick() const { return thick_; } |
| Color BackgroundColor() const { return background_color_; } |
| |
| private: |
| TextCompositionMarkerDetails(Color underline_color, |
| bool thick, |
| Color background_color) |
| : underline_color_(underline_color), |
| background_color_(background_color), |
| thick_(thick) {} |
| |
| Color underline_color_; |
| Color background_color_; |
| bool thick_; |
| }; |
| |
| TextCompositionMarkerDetails* TextCompositionMarkerDetails::Create( |
| Color underline_color, |
| bool thick, |
| Color background_color) { |
| return new TextCompositionMarkerDetails(underline_color, thick, |
| background_color); |
| } |
| |
| inline TextCompositionMarkerDetails* ToTextCompositionMarkerDetails( |
| DocumentMarkerDetails* details) { |
| if (details && details->IsComposition()) |
| return static_cast<TextCompositionMarkerDetails*>(details); |
| return nullptr; |
| } |
| |
| DocumentMarker::DocumentMarker(MarkerType type, |
| unsigned start_offset, |
| unsigned end_offset) |
| : type_(type), start_offset_(start_offset), end_offset_(end_offset) { |
| DCHECK_LT(start_offset, end_offset); |
| } |
| |
| DocumentMarker::DocumentMarker(MarkerType type, |
| unsigned start_offset, |
| unsigned end_offset, |
| const String& description) |
| : type_(type), |
| start_offset_(start_offset), |
| end_offset_(end_offset), |
| details_(description.IsEmpty() |
| ? nullptr |
| : DocumentMarkerDescription::Create(description)) {} |
| |
| DocumentMarker::DocumentMarker(unsigned start_offset, |
| unsigned end_offset, |
| Color underline_color, |
| bool thick, |
| Color background_color) |
| : type_(DocumentMarker::kComposition), |
| start_offset_(start_offset), |
| end_offset_(end_offset), |
| details_(TextCompositionMarkerDetails::Create(underline_color, |
| thick, |
| background_color)) {} |
| |
| Optional<DocumentMarker::MarkerOffsets> |
| DocumentMarker::ComputeOffsetsAfterShift(unsigned offset, |
| unsigned old_length, |
| unsigned new_length) const { |
| MarkerOffsets result; |
| result.start_offset = StartOffset(); |
| result.end_offset = EndOffset(); |
| |
| // algorithm inspired by https://dom.spec.whatwg.org/#concept-cd-replace |
| // but with some changes |
| |
| // Deviation from the concept-cd-replace algorithm: second condition in the |
| // next line (don't include text inserted immediately before a marker in the |
| // marked range, but do include the new text if it's replacing text in the |
| // marked range) |
| if (StartOffset() > offset || (StartOffset() == offset && old_length == 0)) { |
| if (StartOffset() <= offset + old_length) { |
| // Marker start was in the replaced text. Move to end of new text |
| // (Deviation from the concept-cd-replace algorithm: that algorithm |
| // would move to the beginning of the new text here) |
| result.start_offset = offset + new_length; |
| } else { |
| // Marker start was after the replaced text. Shift by length |
| // difference |
| result.start_offset = StartOffset() + new_length - old_length; |
| } |
| } |
| |
| if (EndOffset() > offset) { |
| // Deviation from the concept-cd-replace algorithm: < instead of <= in |
| // the next line |
| if (EndOffset() < offset + old_length) { |
| // Marker end was in the replaced text. Move to beginning of new text |
| result.end_offset = offset; |
| } else { |
| // Marker end was after the replaced text. Shift by length difference |
| result.end_offset = EndOffset() + new_length - old_length; |
| } |
| } |
| |
| if (result.start_offset >= result.end_offset) |
| return WTF::nullopt; |
| |
| return result; |
| } |
| |
| void DocumentMarker::ShiftOffsets(int delta) { |
| start_offset_ += delta; |
| end_offset_ += delta; |
| } |
| |
| const String& DocumentMarker::Description() const { |
| if (DocumentMarkerDescription* details = |
| ToDocumentMarkerDescription(details_.Get())) |
| return details->Description(); |
| return g_empty_string; |
| } |
| |
| Color DocumentMarker::UnderlineColor() const { |
| if (TextCompositionMarkerDetails* details = |
| ToTextCompositionMarkerDetails(details_.Get())) |
| return details->UnderlineColor(); |
| return Color::kTransparent; |
| } |
| |
| bool DocumentMarker::Thick() const { |
| if (TextCompositionMarkerDetails* details = |
| ToTextCompositionMarkerDetails(details_.Get())) |
| return details->Thick(); |
| return false; |
| } |
| |
| Color DocumentMarker::BackgroundColor() const { |
| if (TextCompositionMarkerDetails* details = |
| ToTextCompositionMarkerDetails(details_.Get())) |
| return details->BackgroundColor(); |
| return Color::kTransparent; |
| } |
| |
| DEFINE_TRACE(DocumentMarker) { |
| visitor->Trace(details_); |
| } |
| |
| } // namespace blink |
