/*
 * Copyright (C) 2006 Apple Computer, 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 "BitmapImage.h"
#include "CairoUtilities.h"
#include "GOwnPtr.h"
#include "SharedBuffer.h"
#include <wtf/text/CString.h>
#include <cairo.h>
#include <gtk/gtk.h>

#ifdef _WIN32
#  include <mbstring.h>
#  include <shlobj.h>
/* search for data relative to where we are installed */

static HMODULE hmodule;

#ifdef __cplusplus
extern "C" {
#endif
BOOL WINAPI
DllMain(HINSTANCE hinstDLL,
    DWORD     fdwReason,
    LPVOID    lpvReserved)
{
    switch (fdwReason) {
    case DLL_PROCESS_ATTACH:
        hmodule = hinstDLL;
        break;
    }

    return TRUE;
}
#ifdef __cplusplus
}
#endif

static char *
get_webkit_datadir(void)
{
    static char retval[1000];
    static int beenhere = 0;

    unsigned char *p;

    if (beenhere)
        return retval;

    if (!GetModuleFileName (hmodule, (CHAR *) retval, sizeof(retval) - 10))
        return DATA_DIR;

    p = _mbsrchr((const unsigned char *) retval, '\\');
    *p = '\0';
    p = _mbsrchr((const unsigned char *) retval, '\\');
    if (p) {
        if (!stricmp((const char *) (p+1), "bin"))
            *p = '\0';
    }
    strcat(retval, "\\share");

    beenhere = 1;

    return retval;
}

#undef DATA_DIR
#define DATA_DIR get_webkit_datadir ()
#endif


namespace WTF {

template <> void freeOwnedGPtr<GtkIconInfo>(GtkIconInfo* info)
{
    if (info)
        gtk_icon_info_free(info);
}

}

namespace WebCore {

static CString getThemeIconFileName(const char* name, int size)
{
    GtkIconInfo* iconInfo = gtk_icon_theme_lookup_icon(gtk_icon_theme_get_default(),
                                                       name, size, GTK_ICON_LOOKUP_NO_SVG);
    // Try to fallback on MISSING_IMAGE.
    if (!iconInfo)
        iconInfo = gtk_icon_theme_lookup_icon(gtk_icon_theme_get_default(),
                                              GTK_STOCK_MISSING_IMAGE, size,
                                              GTK_ICON_LOOKUP_NO_SVG);
    if (iconInfo) {
        GOwnPtr<GtkIconInfo> info(iconInfo);
        return CString(gtk_icon_info_get_filename(info.get()));
    }

    // No icon was found, this can happen if not GTK theme is set. In
    // that case an empty Image will be created.
    return CString();
}

static PassRefPtr<SharedBuffer> loadResourceSharedBuffer(CString name)
{
    GOwnPtr<gchar> content;
    gsize length;
    if (!g_file_get_contents(name.data(), &content.outPtr(), &length, 0))
        return SharedBuffer::create();

    return SharedBuffer::create(content.get(), length);
}

void BitmapImage::initPlatformData()
{
}

void BitmapImage::invalidatePlatformData()
{
}

PassRefPtr<Image> loadImageFromFile(CString fileName)
{
    RefPtr<BitmapImage> img = BitmapImage::create();
    if (!fileName.isNull()) {
        RefPtr<SharedBuffer> buffer = loadResourceSharedBuffer(fileName);
        img->setData(buffer.release(), true);
    }
    return img.release();
}

PassRefPtr<Image> Image::loadPlatformResource(const char* name)
{
    CString fileName;
    if (!strcmp("missingImage", name))
        fileName = getThemeIconFileName(GTK_STOCK_MISSING_IMAGE, 16);
    if (fileName.isNull()) {
        gchar* imagename = g_strdup_printf("%s.png", name);
        gchar* glibFileName = g_build_filename(DATA_DIR, "webkit-1.0", "images", imagename, NULL);
        fileName = glibFileName;
        g_free(imagename);
        g_free(glibFileName);
    }

    return loadImageFromFile(fileName);
}

PassRefPtr<Image> Image::loadPlatformThemeIcon(const char* name, int size)
{
    return loadImageFromFile(getThemeIconFileName(name, size));
}

GdkPixbuf* BitmapImage::getGdkPixbuf()
{
    return cairoImageSurfaceToGdkPixbuf(frameAtIndex(currentFrame()));
}

}