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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2013 ChangSeok Oh <shivamidow@gmail.com>
* Copyright (C) 2013 Adobe Systems Inc. All right reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "TrailingObjects.h"
#include "InlineIterator.h"
namespace WebCore {
void TrailingObjects::updateMidpointsForTrailingBoxes(LineMidpointState& lineMidpointState, const InlineIterator& lBreak, CollapseFirstSpaceOrNot collapseFirstSpace)
{
if (!m_whitespace)
return;
// This object is either going to be part of the last midpoint, or it is going to be the actual endpoint.
// In both cases we just decrease our pos by 1 level to exclude the space, allowing it to - in effect - collapse into the newline.
if (lineMidpointState.numMidpoints() % 2) {
// Find the trailing space object's midpoint.
int trailingSpaceMidpoint = lineMidpointState.numMidpoints() - 1;
for ( ; trailingSpaceMidpoint > 0 && lineMidpointState.midpoints()[trailingSpaceMidpoint].renderer() != m_whitespace; --trailingSpaceMidpoint) { }
ASSERT(trailingSpaceMidpoint >= 0);
if (collapseFirstSpace == CollapseFirstSpace)
lineMidpointState.midpoints()[trailingSpaceMidpoint].fastDecrement();
// Now make sure every single trailingPositionedBox following the trailingSpaceMidpoint properly stops and starts
// ignoring spaces.
size_t currentMidpoint = trailingSpaceMidpoint + 1;
for (size_t i = 0; i < m_boxes.size(); ++i) {
if (currentMidpoint >= lineMidpointState.numMidpoints()) {
// We don't have a midpoint for this box yet.
lineMidpointState.ensureLineBoxInsideIgnoredSpaces(m_boxes[i]);
} else {
ASSERT(lineMidpointState.midpoints()[currentMidpoint].renderer() == m_boxes[i]);
ASSERT(lineMidpointState.midpoints()[currentMidpoint + 1].renderer() == m_boxes[i]);
}
currentMidpoint += 2;
}
} else if (!lBreak.renderer()) {
ASSERT(m_whitespace->isText());
ASSERT(collapseFirstSpace == CollapseFirstSpace);
// Add a new end midpoint that stops right at the very end.
unsigned length = m_whitespace->textLength();
unsigned pos = length >= 2 ? length - 2 : UINT_MAX;
InlineIterator endMid(0, m_whitespace, pos);
lineMidpointState.startIgnoringSpaces(endMid);
for (size_t i = 0; i < m_boxes.size(); ++i)
lineMidpointState.ensureLineBoxInsideIgnoredSpaces(m_boxes[i]);
}
}
}
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