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) 2013 ChangSeok Oh <shivamidow@gmail.com>
6 * Copyright (C) 2013 Adobe Systems Inc. All right reserved.
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25#include "config.h"
26#include "TrailingObjects.h"
27
28#include "InlineIterator.h"
29
30namespace WebCore {
31
32void TrailingObjects::updateWhitespaceCollapsingTransitionsForTrailingBoxes(LineWhitespaceCollapsingState& lineWhitespaceCollapsingState, const InlineIterator& lBreak, CollapseFirstSpaceOrNot collapseFirstSpace)
33{
34 if (!m_whitespace)
35 return;
36
37 // This object is either going to be part of the last transition, or it is going to be the actual endpoint.
38 // In both cases we just decrease our pos by 1 level to exclude the space, allowing it to - in effect - collapse into the newline.
39 if (lineWhitespaceCollapsingState.numTransitions() % 2) {
40 // Find the trailing space object's transition.
41 int trailingSpaceTransition = lineWhitespaceCollapsingState.numTransitions() - 1;
42 for ( ; trailingSpaceTransition > 0 && lineWhitespaceCollapsingState.transitions()[trailingSpaceTransition].renderer() != m_whitespace; --trailingSpaceTransition) { }
43 ASSERT(trailingSpaceTransition >= 0);
44 if (collapseFirstSpace == CollapseFirstSpace)
45 lineWhitespaceCollapsingState.decrementTransitionAt(trailingSpaceTransition);
46
47 // Now make sure every single trailingPositionedBox following the trailingSpaceTransition properly stops and starts
48 // ignoring spaces.
49 size_t currentTransition = trailingSpaceTransition + 1;
50 for (size_t i = 0; i < m_boxes.size(); ++i) {
51 if (currentTransition >= lineWhitespaceCollapsingState.numTransitions()) {
52 // We don't have a transition for this box yet.
53 lineWhitespaceCollapsingState.ensureLineBoxInsideIgnoredSpaces(m_boxes[i]);
54 } else {
55 ASSERT(lineWhitespaceCollapsingState.transitions()[currentTransition].renderer() == &(m_boxes[i].get()));
56 ASSERT(lineWhitespaceCollapsingState.transitions()[currentTransition + 1].renderer() == &(m_boxes[i].get()));
57 }
58 currentTransition += 2;
59 }
60 } else if (!lBreak.renderer()) {
61 ASSERT(m_whitespace->isText());
62 ASSERT(collapseFirstSpace == CollapseFirstSpace);
63 // Add a new end transition that stops right at the very end.
64 unsigned length = m_whitespace->text().length();
65 unsigned pos = length >= 2 ? length - 2 : UINT_MAX;
66 InlineIterator endMid(0, m_whitespace, pos);
67 lineWhitespaceCollapsingState.startIgnoringSpaces(endMid);
68 for (size_t i = 0; i < m_boxes.size(); ++i)
69 lineWhitespaceCollapsingState.ensureLineBoxInsideIgnoredSpaces(m_boxes[i]);
70 }
71}
72
73}
74