1 /*

     2  * Copyright (C) 2010 Apple Inc. All rights reserved.

     3  *

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

     5  * modification, are permitted provided that the following conditions

     6  * are met:

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

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

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

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

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

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

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

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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

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

    24  */

    25 

    26 #include "config.h"

    27 #include "RenderFrameBase.h"

    28 

    29 #include "FrameView.h"

    30 #include "HTMLFrameElementBase.h"

    31 #include "RenderView.h"

    32 

    33 namespace WebCore {

    34     

    35 RenderFrameBase::RenderFrameBase(Element* element)

    36     : RenderPart(element)

    37 {

    38 }

    39 

    40 void RenderFrameBase::layoutWithFlattening(bool fixedWidth, bool fixedHeight)

    41 {

    42     FrameView* childFrameView = static_cast<FrameView*>(widget());

    43     RenderView* childRoot = childFrameView ? static_cast<RenderView*>(childFrameView->frame()->contentRenderer()) : 0;

    44 

    45     // Do not expand frames which has zero width or height

    46     if (!width() || !height() || !childRoot) {

    47         updateWidgetPosition();

    48         if (childFrameView)

    49             childFrameView->layout();

    50         setNeedsLayout(false);

    51         return;

    52     }

    53 

    54     // need to update to calculate min/max correctly

    55     updateWidgetPosition();

    56     if (childRoot->prefWidthsDirty())

    57         childRoot->calcPrefWidths();

    58 

    59     // if scrollbars are off, and the width or height are fixed

    60     // we obey them and do not expand. With frame flattening

    61     // no subframe much ever become scrollable.

    62 

    63     HTMLFrameElementBase* element = static_cast<HTMLFrameElementBase*>(node());

    64     bool isScrollable = element->scrollingMode() != ScrollbarAlwaysOff;

    65 

    66     // consider iframe inset border

    67     int hBorder = borderLeft() + borderRight();

    68     int vBorder = borderTop() + borderBottom();

    69 

    70     // make sure minimum preferred width is enforced

    71     if (isScrollable || !fixedWidth) {

    72         setWidth(max(width(), childRoot->minPrefWidth() + hBorder));

    73         // update again to pass the new width to the child frame

    74         updateWidgetPosition();

    75         childFrameView->layout();

    76     }

    77 

    78     // expand the frame by setting frame height = content height

    79     if (isScrollable || !fixedHeight || childRoot->isFrameSet())

    80         setHeight(max(height(), childFrameView->contentsHeight() + vBorder));

    81     if (isScrollable || !fixedWidth || childRoot->isFrameSet())

    82         setWidth(max(width(), childFrameView->contentsWidth() + hBorder));

    83 

    84     updateWidgetPosition();

    85 

    86     ASSERT(!childFrameView->layoutPending());

    87     ASSERT(!childRoot->needsLayout());

    88     ASSERT(!childRoot->firstChild() || !childRoot->firstChild()->firstChild() || !childRoot->firstChild()->firstChild()->needsLayout());

    89 

    90     setNeedsLayout(false);

    91 }

    92 

    93 }