1 /*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
4 * Copyright (C) 2010 Google Inc. All rights reserved.
5 * Copyright (C) 2014 Adobe Systems Inc.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24 #include "config.h"
25 #include "core/rendering/line/TrailingObjects.h"
26
27 #include "core/rendering/InlineIterator.h"
28
29 namespace blink {
30
updateMidpointsForTrailingObjects(LineMidpointState & lineMidpointState,const InlineIterator & lBreak,CollapseFirstSpaceOrNot collapseFirstSpace)31 void TrailingObjects::updateMidpointsForTrailingObjects(LineMidpointState& lineMidpointState, const InlineIterator& lBreak, CollapseFirstSpaceOrNot collapseFirstSpace)
32 {
33 if (!m_whitespace)
34 return;
35
36 // This object is either going to be part of the last midpoint, or it is going to be the actual endpoint.
37 // In both cases we just decrease our pos by 1 level to exclude the space, allowing it to - in effect - collapse into the newline.
38 if (lineMidpointState.numMidpoints() % 2) {
39 // Find the trailing space object's midpoint.
40 int trailingSpaceMidpoint = lineMidpointState.numMidpoints() - 1;
41 for ( ; trailingSpaceMidpoint > 0 && lineMidpointState.midpoints()[trailingSpaceMidpoint].object() != m_whitespace; --trailingSpaceMidpoint) { }
42 ASSERT(trailingSpaceMidpoint >= 0);
43 if (collapseFirstSpace == CollapseFirstSpace)
44 lineMidpointState.midpoints()[trailingSpaceMidpoint].setOffset(lineMidpointState.midpoints()[trailingSpaceMidpoint].offset() -1);
45
46 // Now make sure every single trailingPositionedBox following the trailingSpaceMidpoint properly stops and starts
47 // ignoring spaces.
48 size_t currentMidpoint = trailingSpaceMidpoint + 1;
49 for (size_t i = 0; i < m_objects.size(); ++i) {
50 if (currentMidpoint >= lineMidpointState.numMidpoints()) {
51 // We don't have a midpoint for this box yet.
52 lineMidpointState.ensureLineBoxInsideIgnoredSpaces(m_objects[i]);
53 } else {
54 ASSERT(lineMidpointState.midpoints()[currentMidpoint].object() == m_objects[i]);
55 ASSERT(lineMidpointState.midpoints()[currentMidpoint + 1].object() == m_objects[i]);
56 }
57 currentMidpoint += 2;
58 }
59 } else if (!lBreak.object()) {
60 ASSERT(collapseFirstSpace == CollapseFirstSpace);
61 // Add a new end midpoint that stops right at the very end.
62 unsigned length = m_whitespace->textLength();
63 unsigned pos = length >= 2 ? length - 2 : UINT_MAX;
64 InlineIterator endMid(0, m_whitespace, pos);
65 lineMidpointState.startIgnoringSpaces(endMid);
66 for (size_t i = 0; i < m_objects.size(); ++i) {
67 lineMidpointState.ensureLineBoxInsideIgnoredSpaces(m_objects[i]);
68 }
69 }
70 }
71
72 }
73