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
RenderFrameBase(Element * element)35 RenderFrameBase::RenderFrameBase(Element* element)
36 : RenderPart(element)
37 {
38 }
39
layoutWithFlattening(bool fixedWidth,bool fixedHeight)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->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