/*

 * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.

 * Copyright (C) 2006 Alexey Proskuryakov

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "FontData.h"

#include <wtf/MathExtras.h>

namespace WebCore {

FontData::FontData(const FontPlatformData& f)

    : m_font(f)

    , m_treatAsFixedPitch(false)

    , m_smallCapsFontData(0)

{    

    platformInit();

#if !PLATFORM(SYMBIAN)    

    GlyphPage* glyphPageZero = GlyphPageTreeNode::getRootChild(this, 0)->page();

    if (!glyphPageZero) {

        LOG_ERROR("Failed to get glyph page zero.");

        m_spaceGlyph = 0;

        m_spaceWidth = 0;

        m_adjustedSpaceWidth = 0;

        determinePitch();

        m_missingGlyphData.fontData = this;

        m_missingGlyphData.glyph = 0;

        return;

    }

    // Nasty hack to determine if we should round or ceil space widths.

    // If the font is monospace or fake monospace we ceil to ensure that 

    // every character and the space are the same width.  Otherwise we round.

    m_spaceGlyph = glyphPageZero->glyphDataForCharacter(' ').glyph;

    float width = widthForGlyph(m_spaceGlyph);

    m_spaceWidth = width;

    determinePitch();

    m_adjustedSpaceWidth = m_treatAsFixedPitch ? ceilf(width) : roundf(width);

    // Force the glyph for ZERO WIDTH SPACE to have zero width, unless it is shared with SPACE.

    // Helvetica is an example of a non-zero width ZERO WIDTH SPACE glyph.

    // See <http://bugs.webkit.org/show_bug.cgi?id=13178>

    // Ask for the glyph for 0 to avoid paging in ZERO WIDTH SPACE. Control characters, including 0,

    // are mapped to the ZERO WIDTH SPACE glyph.

    Glyph zeroWidthSpaceGlyph = glyphPageZero->glyphDataForCharacter(0).glyph;

    if (zeroWidthSpaceGlyph) {

        if (zeroWidthSpaceGlyph != m_spaceGlyph)

            m_glyphToWidthMap.setWidthForGlyph(zeroWidthSpaceGlyph, 0);

        else

            LOG_ERROR("Font maps SPACE and ZERO WIDTH SPACE to the same glyph. Glyph width not overridden.");

    }

    m_missingGlyphData.fontData = this;

    m_missingGlyphData.glyph = 0;

#endif

}

FontData::~FontData()

{

    platformDestroy();

    // We only get deleted when the cache gets cleared.  Since the smallCapsRenderer is also in that cache,

    // it will be deleted then, so we don't need to do anything here.

}

float FontData::widthForGlyph(Glyph glyph) const

{

    float width = m_glyphToWidthMap.widthForGlyph(glyph);

    if (width != cGlyphWidthUnknown)

        return width;

    width = platformWidthForGlyph(glyph);

    m_glyphToWidthMap.setWidthForGlyph(glyph, width);

    return width;

}

} // namespace WebCore