/*

 * Copyright (C) 2007 Apple Inc.  All rights reserved.

 *

 * 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR

 * 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 "WebKitGraphics.h"

#include "WebKit.h"

#include "WebKitDLL.h"

#include "WebPreferences.h"

#pragma warning(push, 0)

#include <WebCore/CharacterNames.h>

#include <WebCore/Font.h>

#include <WebCore/FontDescription.h>

#include <WebCore/FontSelector.h>

#include <WebCore/GraphicsContext.h>

#include <WebCore/PlatformString.h>

#include <WebCore/StringTruncator.h>

#include <WebCore/WebCoreTextRenderer.h>

#include <CoreGraphics/CoreGraphics.h>

#pragma warning(pop)

#include <WebKitSystemInterface/WebKitSystemInterface.h>

using namespace WebCore;

static Font makeFont(const WebFontDescription& description)

{

    AtomicString::init();

    String fontFamilyString(description.family, description.familyLength);

    FontDescription f;

    FontFamily family;

    family.setFamily(fontFamilyString);

    f.setFamily(family);

    f.setSpecifiedSize(description.size);

    f.setComputedSize(description.size);

    f.setItalic(description.italic);

    f.setWeight(description.bold ? FontWeightBold : FontWeightNormal);

    f.setIsAbsoluteSize(true);

    FontSmoothingType smoothingType;

    if (SUCCEEDED(WebPreferences::sharedStandardPreferences()->fontSmoothing(&smoothingType)))

        f.setRenderingMode(smoothingType == FontSmoothingTypeWindows ? AlternateRenderingMode : NormalRenderingMode);

    Font font(f, 0, 0);

    font.update(0);

    return font;

}

// Text shadow is added post 3.1.1.  In order for nightlies to not break Safari 3.1.1, we should still allow

// the old WebTextRenderInfo that has a smaller structSize than the current one with the new text shadow data members.

struct WebTextRenderInfoWithoutShadow

{

    DWORD structSize;

    CGContextRef cgContext;

    LPCTSTR text;

    int length;

    POINT pt;

    const WebFontDescription* description;

    CGColorRef color;

    int underlinedIndex;

    bool drawAsPassword;

    int overrideSmoothingLevel; // pass in -1 if caller does not want to override smoothing level

};

void WebDrawText(WebTextRenderInfo* info)

{

    if (!info || info->structSize < sizeof(WebTextRenderInfoWithoutShadow) || !info->cgContext || !info->description)

        return;

    int oldFontSmoothingLevel = -1;

    if (info->overrideSmoothingLevel >= 0) {

        oldFontSmoothingLevel = wkGetFontSmoothingLevel();

        wkSetFontSmoothingLevel(info->overrideSmoothingLevel);

    }

    {

        GraphicsContext context(info->cgContext);

        String drawString(info->text, info->length);

        if (info->drawAsPassword)

            drawString = drawString.impl()->secure(WebCore::bullet);

        context.save();

        // Set shadow setting

        if (info->structSize == sizeof(WebTextRenderInfo) &&

            (info->shadowOffset.cx || info->shadowOffset.cy || info->shadowBlur || info->shadowColor))

            context.setShadow(FloatSize(info->shadowOffset.cx, info->shadowOffset.cy), info->shadowBlur, info->shadowColor, DeviceColorSpace);

        WebCoreDrawTextAtPoint(context, drawString, info->pt, makeFont(*(info->description)), info->color, info->underlinedIndex);

        context.restore();

    }

    if (info->overrideSmoothingLevel >= 0)

        wkSetFontSmoothingLevel(oldFontSmoothingLevel);

}

float TextFloatWidth(LPCTSTR text, int length, const WebFontDescription& description)

{

    return WebCoreTextFloatWidth(String(text, length), makeFont(description));

}

void FontMetrics(const WebFontDescription& description, int* ascent, int* descent, int* lineSpacing)

{

    if (!ascent && !descent && !lineSpacing)

        return;

    Font font(makeFont(description));

    if (ascent)

        *ascent = font.ascent();

    if (descent)

        *descent = font.descent();

    if (lineSpacing)

        *lineSpacing = font.lineSpacing();

}

unsigned CenterTruncateStringToWidth(LPCTSTR text, int length, const WebFontDescription& description, float width, WCHAR* buffer)

{

    ASSERT(buffer);

    String result = StringTruncator::centerTruncate(String(text, length), width, makeFont(description), false);

    memcpy(buffer, result.characters(), result.length() * sizeof(UChar));

    buffer[result.length()] = '\0';

    return result.length();

}

unsigned RightTruncateStringToWidth(LPCTSTR text, int length, const WebFontDescription& description, float width, WCHAR* buffer)

{

    ASSERT(buffer);

    String result = StringTruncator::rightTruncate(String(text, length), width, makeFont(description), false);

    memcpy(buffer, result.characters(), result.length() * sizeof(UChar));

    buffer[result.length()] = '\0';

    return result.length();

}

void WebKitSetShouldUseFontSmoothing(bool smooth)

{

    WebCoreSetShouldUseFontSmoothing(smooth);

}

bool WebKitShouldUseFontSmoothing()

{

    return WebCoreShouldUseFontSmoothing();

}