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 "core/rendering/RenderIFrame.h"
28
29 #include "HTMLNames.h"
30 #include "core/html/HTMLIFrameElement.h"
31 #include "core/frame/Frame.h"
32 #include "core/frame/FrameView.h"
33 #include "core/rendering/LayoutRectRecorder.h"
34 #include "core/rendering/RenderView.h"
35
36 namespace WebCore {
37
38 using namespace HTMLNames;
39
RenderIFrame(Element * element)40 RenderIFrame::RenderIFrame(Element* element)
41 : RenderPart(element)
42 {
43 }
44
shouldComputeSizeAsReplaced() const45 bool RenderIFrame::shouldComputeSizeAsReplaced() const
46 {
47 // When we're seamless, we use normal block/box sizing code except when inline.
48 return !isSeamless();
49 }
50
isInlineBlockOrInlineTable() const51 bool RenderIFrame::isInlineBlockOrInlineTable() const
52 {
53 return isSeamless() && isInline();
54 }
55
minPreferredLogicalWidth() const56 LayoutUnit RenderIFrame::minPreferredLogicalWidth() const
57 {
58 if (!isSeamless())
59 return RenderPart::minPreferredLogicalWidth();
60
61 RenderView* childRoot = contentRootRenderer();
62 if (!childRoot)
63 return 0;
64
65 return childRoot->minPreferredLogicalWidth() + borderAndPaddingLogicalWidth();
66 }
67
maxPreferredLogicalWidth() const68 LayoutUnit RenderIFrame::maxPreferredLogicalWidth() const
69 {
70 if (!isSeamless())
71 return RenderPart::maxPreferredLogicalWidth();
72
73 RenderView* childRoot = contentRootRenderer();
74 if (!childRoot)
75 return 0;
76
77 return childRoot->maxPreferredLogicalWidth() + borderAndPaddingLogicalWidth();
78 }
79
isSeamless() const80 bool RenderIFrame::isSeamless() const
81 {
82 return node() && node()->hasTagName(iframeTag) && toHTMLIFrameElement(node())->shouldDisplaySeamlessly();
83 }
84
requiresLayer() const85 bool RenderIFrame::requiresLayer() const
86 {
87 return RenderPart::requiresLayer() || style()->resize() != RESIZE_NONE;
88 }
89
contentRootRenderer() const90 RenderView* RenderIFrame::contentRootRenderer() const
91 {
92 // FIXME: Is this always a valid cast? What about plugins?
93 ASSERT(!widget() || widget()->isFrameView());
94 FrameView* childFrameView = toFrameView(widget());
95 return childFrameView ? childFrameView->frame().contentRenderer() : 0;
96 }
97
layoutSeamlessly()98 void RenderIFrame::layoutSeamlessly()
99 {
100 updateLogicalWidth();
101 // FIXME: Containers set their height to 0 before laying out their kids (as we're doing here)
102 // however, this causes FrameView::layout() to add vertical scrollbars, incorrectly inflating
103 // the resulting contentHeight(). We'll need to make FrameView::layout() smarter.
104 setLogicalHeight(0);
105 updateWidgetPosition(); // Tell the Widget about our new width/height (it will also layout the child document).
106
107 // Laying out our kids is normally responsible for adjusting our height, so we set it here.
108 // Replaced elements normally do not respect padding, but seamless elements should: we'll add
109 // both padding and border to the child's logical height here.
110 FrameView* childFrameView = toFrameView(widget());
111 if (childFrameView) // Widget should never be null during layout(), but just in case.
112 setLogicalHeight(childFrameView->contentsHeight() + borderTop() + borderBottom() + paddingTop() + paddingBottom());
113 updateLogicalHeight();
114
115 updateWidgetPosition(); // Notify the Widget of our final height.
116
117 // Assert that the child document did a complete layout.
118 RenderView* childRoot = childFrameView ? childFrameView->frame().contentRenderer() : 0;
119 ASSERT(!childFrameView || !childFrameView->layoutPending());
120 ASSERT_UNUSED(childRoot, !childRoot || !childRoot->needsLayout());
121 }
122
layout()123 void RenderIFrame::layout()
124 {
125 ASSERT(needsLayout());
126
127 LayoutRectRecorder recorder(*this);
128 if (isSeamless()) {
129 layoutSeamlessly();
130 // Do not return so as to share the layer and overflow updates below.
131 } else {
132 updateLogicalWidth();
133 // No kids to layout as a replaced element.
134 updateLogicalHeight();
135 }
136
137 m_overflow.clear();
138 addVisualEffectOverflow();
139 updateLayerTransform();
140
141 clearNeedsLayout();
142 }
143
144 }
145