/*

 * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.

 * Copyright (C) 2007-2009 Torch Mobile, Inc.

 *

 * 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 "Frame.h"

#include "Document.h"

#include "FloatRect.h"

#include "FrameView.h"

#include "GraphicsContext.h"

#include "HTMLIFrameElement.h"

#include "HTMLNames.h"

#include "HTMLTableCellElement.h"

#include "KeyboardEvent.h"

#include "Page.h"

#include "RenderFrame.h"

#include "RenderLayer.h"

#include "RenderView.h"

#include "ResourceHandle.h"

#include <windows.h>

using std::min;

namespace WebCore {

using namespace HTMLNames;

extern HDC g_screenDC;

void computePageRectsForFrame(Frame* frame, const IntRect& printRect, float headerHeight, float footerHeight, float userScaleFactor, Vector<IntRect>& pages, int& outPageHeight)

{

    ASSERT(frame);

    pages.clear();

    outPageHeight = 0;

    if (!frame->document() || !frame->view() || !frame->document()->renderer())

        return;

    RenderView* root = toRenderView(frame->document()->renderer());

    if (!root) {

        LOG_ERROR("document to be printed has no renderer");

        return;

    }

    if (userScaleFactor <= 0) {

        LOG_ERROR("userScaleFactor has bad value %.2f", userScaleFactor);

        return;

    }

    float ratio = (float)printRect.height() / (float)printRect.width();

    float pageWidth  = (float) root->rightLayoutOverflow();

    float pageHeight = pageWidth * ratio;

    outPageHeight = (int) pageHeight;   // this is the height of the page adjusted by margins

    pageHeight -= (headerHeight + footerHeight);

    if (pageHeight <= 0) {

        LOG_ERROR("pageHeight has bad value %.2f", pageHeight);

        return;

    }

    float currPageHeight = pageHeight / userScaleFactor;

    float docHeight      = root->layer()->height();

    float docWidth       = root->layer()->width();

    float currPageWidth  = pageWidth / userScaleFactor;

    // always return at least one page, since empty files should print a blank page

    float printedPagesHeight = 0.0;

    do {

        float proposedBottom = min(docHeight, printedPagesHeight + pageHeight);

        frame->view()->adjustPageHeight(&proposedBottom, printedPagesHeight, proposedBottom, printedPagesHeight);

        currPageHeight = max(1.0f, proposedBottom - printedPagesHeight);

        pages.append(IntRect(0, printedPagesHeight, currPageWidth, currPageHeight));

        printedPagesHeight += currPageHeight;

    } while (printedPagesHeight < docHeight);

}

HBITMAP imageFromSelection(Frame* frame, bool forceBlackText)

{

    if (!frame->view())

        return 0;

    frame->view()->setPaintRestriction(forceBlackText ? PaintRestrictionSelectionOnlyBlackText : PaintRestrictionSelectionOnly);

    FloatRect fr = frame->selectionBounds();

    IntRect ir((int)fr.x(), (int)fr.y(), (int)fr.width(), (int)fr.height());

    if (ir.isEmpty())

        return 0;

    int w;

    int h;

    FrameView* view = frame->view();

    if (view->parent()) {

        ir.setLocation(view->parent()->convertChildToSelf(view, ir.location()));

        w = ir.width() * view->zoomFactor() + 0.5;

        h = ir.height() * view->zoomFactor() + 0.5;

    } else {

        ir = view->contentsToWindow(ir);

        w = ir.width();

        h = ir.height();

    }

    OwnPtr<HDC> bmpDC(CreateCompatibleDC(g_screenDC));

    HBITMAP hBmp = MemoryManager::createCompatibleBitmap(g_screenDC, w, h);

    if (!hBmp)

        return 0;

    HBITMAP hbmpOld = (HBITMAP)SelectObject(bmpDC.get(), hBmp);

    {

        GraphicsContext gc(bmpDC.get());

        frame->document()->updateLayout();

        view->paint(&gc, ir);

    }

    SelectObject(bmpDC.get(), hbmpOld);

    frame->view()->setPaintRestriction(PaintRestrictionNone);

    return hBmp;

}

DragImageRef Frame::dragImageForSelection()

{

    if (selection()->isRange())

        return imageFromSelection(this, false);

    return 0;

}

} // namespace WebCore