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73 lines
3.4 KiB
C++
73 lines
3.4 KiB
C++
/*
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* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
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* Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
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* Copyright (C) 2010 Google Inc. All rights reserved.
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* Copyright (C) 2014 Adobe Systems Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "config.h"
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#include "core/rendering/line/TrailingObjects.h"
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#include "core/rendering/InlineIterator.h"
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namespace blink {
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void TrailingObjects::updateMidpointsForTrailingObjects(LineMidpointState& lineMidpointState, const InlineIterator& lBreak, CollapseFirstSpaceOrNot collapseFirstSpace)
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{
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if (!m_whitespace)
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return;
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// This object is either going to be part of the last midpoint, or it is going to be the actual endpoint.
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// In both cases we just decrease our pos by 1 level to exclude the space, allowing it to - in effect - collapse into the newline.
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if (lineMidpointState.numMidpoints() % 2) {
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// Find the trailing space object's midpoint.
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int trailingSpaceMidpoint = lineMidpointState.numMidpoints() - 1;
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for ( ; trailingSpaceMidpoint > 0 && lineMidpointState.midpoints()[trailingSpaceMidpoint].object() != m_whitespace; --trailingSpaceMidpoint) { }
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ASSERT(trailingSpaceMidpoint >= 0);
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if (collapseFirstSpace == CollapseFirstSpace)
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lineMidpointState.midpoints()[trailingSpaceMidpoint].setOffset(lineMidpointState.midpoints()[trailingSpaceMidpoint].offset() -1);
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// Now make sure every single trailingPositionedBox following the trailingSpaceMidpoint properly stops and starts
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// ignoring spaces.
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size_t currentMidpoint = trailingSpaceMidpoint + 1;
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for (size_t i = 0; i < m_objects.size(); ++i) {
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if (currentMidpoint >= lineMidpointState.numMidpoints()) {
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// We don't have a midpoint for this box yet.
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lineMidpointState.ensureLineBoxInsideIgnoredSpaces(m_objects[i]);
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} else {
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ASSERT(lineMidpointState.midpoints()[currentMidpoint].object() == m_objects[i]);
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ASSERT(lineMidpointState.midpoints()[currentMidpoint + 1].object() == m_objects[i]);
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}
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currentMidpoint += 2;
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}
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} else if (!lBreak.object()) {
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ASSERT(collapseFirstSpace == CollapseFirstSpace);
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// Add a new end midpoint that stops right at the very end.
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unsigned length = m_whitespace->textLength();
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unsigned pos = length >= 2 ? length - 2 : UINT_MAX;
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InlineIterator endMid(0, m_whitespace, pos);
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lineMidpointState.startIgnoringSpaces(endMid);
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for (size_t i = 0; i < m_objects.size(); ++i) {
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lineMidpointState.ensureLineBoxInsideIgnoredSpaces(m_objects[i]);
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}
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}
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}
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}
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