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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "core/editing/markers/EditingMarkerList.h" |
| 6 |
| 7 #include <algorithm> |
| 8 #include "core/editing/markers/DocumentMarkerController.h" |
| 9 |
| 10 namespace blink { |
| 11 |
| 12 namespace { |
| 13 |
| 14 bool compareByStart(const Member<DocumentMarker>& lhv, |
| 15 const Member<DocumentMarker>& rhv) { |
| 16 return lhv->startOffset() < rhv->startOffset(); |
| 17 } |
| 18 |
| 19 } // namespace |
| 20 |
| 21 EditingMarkerList::EditingMarkerList( |
| 22 DocumentMarkerController* documentMarkerController) |
| 23 : DocumentMarkerList(documentMarkerController), m_markersAreSorted(false) {} |
| 24 |
| 25 void EditingMarkerList::clear() { |
| 26 m_markers.clear(); |
| 27 m_markersAreSorted = true; |
| 28 } |
| 29 |
| 30 bool EditingMarkerList::copyMarkers(unsigned startOffset, |
| 31 int length, |
| 32 Node* dstNode, |
| 33 int delta) const { |
| 34 bool docDirty = false; |
| 35 unsigned endOffset = startOffset + length - 1; |
| 36 for (Member<DocumentMarker> marker : m_markers) { |
| 37 // pin the marker to the specified range and apply the shift delta |
| 38 if (marker->endOffset() >= startOffset && |
| 39 marker->startOffset() <= endOffset) { |
| 40 docDirty = true; |
| 41 if (marker->startOffset() < startOffset) |
| 42 marker->setStartOffset(startOffset); |
| 43 if (marker->endOffset() > endOffset) |
| 44 marker->setEndOffset(endOffset); |
| 45 marker->shiftOffsets(delta); |
| 46 |
| 47 m_documentMarkerController->addMarker(dstNode, marker); |
| 48 } |
| 49 } |
| 50 |
| 51 return docDirty; |
| 52 } |
| 53 |
| 54 void EditingMarkerList::removeMarkers( |
| 55 unsigned startOffset, |
| 56 int length, |
| 57 bool shouldRemovePartiallyOverlappingMarkers, |
| 58 bool* didRemoveMarker) { |
| 59 unsigned endOffset = startOffset + length; |
| 60 size_t markerIndex = 0; |
| 61 if (m_markersAreSorted) { |
| 62 markerIndex = |
| 63 getPosOfFirstMarkerNotEndingBefore(markerIndex) - m_markers.begin(); |
| 64 } |
| 65 |
| 66 for (; markerIndex < m_markers.size(); ++markerIndex) { |
| 67 DocumentMarker& marker = *m_markers.at(markerIndex); |
| 68 |
| 69 if (!m_markersAreSorted) { |
| 70 if (marker.endOffset() <= startOffset) |
| 71 continue; |
| 72 } |
| 73 |
| 74 if (marker.startOffset() >= endOffset) { |
| 75 if (m_markersAreSorted) |
| 76 break; |
| 77 continue; |
| 78 } |
| 79 |
| 80 // pitch the old marker |
| 81 m_markers.remove(markerIndex); |
| 82 *didRemoveMarker = true; |
| 83 |
| 84 if (shouldRemovePartiallyOverlappingMarkers) { |
| 85 // Stop here. Don't add resulting slices back. |
| 86 continue; |
| 87 } |
| 88 |
| 89 // add either of the resulting slices that are left after removing target |
| 90 if (startOffset > marker.startOffset()) { |
| 91 DocumentMarker* newLeft = new DocumentMarker(marker); |
| 92 newLeft->setEndOffset(startOffset); |
| 93 m_markers.insert(markerIndex, *newLeft); |
| 94 // Move to the marker after the inserted one. |
| 95 ++markerIndex; |
| 96 } |
| 97 if (marker.endOffset() > endOffset) { |
| 98 DocumentMarker* newRight = new DocumentMarker(marker); |
| 99 newRight->setStartOffset(endOffset); |
| 100 m_markers.insert(markerIndex, *newRight); |
| 101 // Move to the marker after the inserted one. |
| 102 ++markerIndex; |
| 103 } |
| 104 } |
| 105 } |
| 106 |
| 107 bool EditingMarkerList::shiftMarkers(unsigned offset, |
| 108 unsigned oldLength, |
| 109 unsigned newLength) { |
| 110 bool didShift = false; |
| 111 for (auto it = m_markers.begin(); it != m_markers.end(); ++it) { |
| 112 DocumentMarker& marker = **it; |
| 113 |
| 114 DocumentMarker::ShiftMarkerResult result = |
| 115 marker.getShiftedMarkerPosition(offset, oldLength, newLength); |
| 116 if (result.shouldRemoveMarker) { |
| 117 m_markers.remove(it - m_markers.begin()); |
| 118 --it; |
| 119 |
| 120 didShift = true; |
| 121 } else if (result.newStartOffset != marker.startOffset() || |
| 122 result.newEndOffset != marker.endOffset()) { |
| 123 marker.setStartOffset(result.newStartOffset); |
| 124 marker.setEndOffset(result.newEndOffset); |
| 125 |
| 126 didShift = true; |
| 127 } |
| 128 } |
| 129 |
| 130 return didShift; |
| 131 } |
| 132 |
| 133 void EditingMarkerList::insert(DocumentMarker* marker) { |
| 134 DCHECK(marker->type() == allowedMarkerType()); |
| 135 if (m_markersAreSorted && !m_markers.isEmpty() && |
| 136 m_markers.back()->endOffset() > marker->startOffset()) |
| 137 m_markersAreSorted = false; |
| 138 m_markers.push_back(marker); |
| 139 } |
| 140 |
| 141 void EditingMarkerList::sortMarkerList() { |
| 142 std::sort(m_markers.begin(), m_markers.end(), compareByStart); |
| 143 } |
| 144 |
| 145 DEFINE_TRACE(EditingMarkerList) { |
| 146 visitor->trace(m_markers); |
| 147 DocumentMarkerList::trace(visitor); |
| 148 } |
| 149 |
| 150 } // namespace blink |
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