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
33namespace WebCore {
34
35RenderFrameBase::RenderFrameBase(Element* element)
36    : RenderPart(element)
37{
38}
39
40void 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->preferredLogicalWidthsDirty())
57        childRoot->computePreferredLogicalWidths();
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->minPreferredLogicalWidth() + 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}
94