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 Adobe Systems Incorporated.
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/BreakingContextInlineHeaders.h"
26
27 namespace blink {
28
handleEndOfLine()29 InlineIterator BreakingContext::handleEndOfLine()
30 {
31 if (m_lineBreak == m_resolver.position() && (!m_lineBreak.object() || !m_lineBreak.object()->isBR())) {
32 // we just add as much as possible
33 if (m_blockStyle->whiteSpace() == PRE && !m_current.offset()) {
34 m_lineBreak.moveTo(m_lastObject, m_lastObject->isText() ? m_lastObject->length() : 0);
35 } else if (m_lineBreak.object()) {
36 // Don't ever break in the middle of a word if we can help it.
37 // There's no room at all. We just have to be on this line,
38 // even though we'll spill out.
39 m_lineBreak.moveTo(m_current.object(), m_current.offset());
40 }
41 }
42
43 // FIXME Bug 100049: We do not need to consume input in a multi-segment line
44 // unless no segment will.
45 if (m_lineBreak == m_resolver.position())
46 m_lineBreak.increment();
47
48 // Sanity check our midpoints.
49 m_lineMidpointState.checkMidpoints(m_lineBreak);
50
51 m_trailingObjects.updateMidpointsForTrailingObjects(m_lineMidpointState, m_lineBreak, TrailingObjects::CollapseFirstSpace);
52
53 // We might have made lineBreak an iterator that points past the end
54 // of the object. Do this adjustment to make it point to the start
55 // of the next object instead to avoid confusing the rest of the
56 // code.
57 if (m_lineBreak.offset()) {
58 // This loop enforces the invariant that line breaks should never point
59 // at an empty inline. See http://crbug.com/305904.
60 do {
61 m_lineBreak.setOffset(m_lineBreak.offset() - 1);
62 m_lineBreak.increment();
63 } while (!m_lineBreak.atEnd() && isEmptyInline(m_lineBreak.object()));
64 }
65
66 return m_lineBreak;
67 }
68
69 }
70