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) 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 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
