1 /* 2 * Copyright (C) 2000 Lars Knoll (knoll (at) 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 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
