1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 2000 Simon Hausmann <hausmann@kde.org>
4 *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
5 * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB.  If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24#include "config.h"
25#include "RenderFrame.h"
26
27#include "FrameView.h"
28#include "HTMLFrameElement.h"
29#include "RenderView.h"
30
31#ifdef FLATTEN_FRAMESET
32#include "Frame.h"
33#include "Document.h"
34#include "RenderView.h"
35#endif
36
37namespace WebCore {
38
39RenderFrame::RenderFrame(HTMLFrameElement* frame)
40    : RenderPart(frame)
41{
42    setInline(false);
43}
44
45FrameEdgeInfo RenderFrame::edgeInfo() const
46{
47    HTMLFrameElement* element = static_cast<HTMLFrameElement*>(node());
48    return FrameEdgeInfo(element->noResize(), element->hasFrameBorder());
49}
50
51void RenderFrame::viewCleared()
52{
53    HTMLFrameElement* element = static_cast<HTMLFrameElement*>(node());
54    if (!element || !widget() || !widget()->isFrameView())
55        return;
56
57    FrameView* view = static_cast<FrameView*>(widget());
58
59    int marginw = element->getMarginWidth();
60    int marginh = element->getMarginHeight();
61
62    if (marginw != -1)
63        view->setMarginWidth(marginw);
64    if (marginh != -1)
65        view->setMarginHeight(marginh);
66}
67
68#ifdef FLATTEN_FRAMESET
69void RenderFrame::layout()
70{
71    if (widget() && widget()->isFrameView()) {
72        FrameView* view = static_cast<FrameView*>(widget());
73        RenderView* root = NULL;
74        if (view->frame() && view->frame()->document() &&
75            view->frame()->document()->renderer() &&
76            view->frame()->document()->renderer()->isRenderView())
77            root = static_cast<RenderView*>(view->frame()->document()->renderer());
78        if (root) {
79            // Resize the widget so that the RenderView will layout according to those dimensions.
80            view->resize(width(), height());
81            view->layout();
82            // We can only grow in width and height because if positionFrames gives us a width and we become smaller,
83            // then the fixup process of forcing the frame to fill extra space will fail.
84            if (width() > root->docWidth()) {
85                view->resize(root->docWidth(), 0);
86                view->layout();
87            }
88            // Honor the height set by RenderFrameSet::positionFrames unless our document height is larger.
89            setHeight(max(root->docHeight(), height()));
90            setWidth(max(root->docWidth(), width()));
91        }
92    }
93    setNeedsLayout(false);
94}
95#endif
96void RenderFrame::layoutWithFlattening(bool fixedWidth, bool fixedHeight)
97{
98    // NOTE: The width and height have been set at this point by
99    // RenderFrameSet::positionFramesWithFlattening()
100
101    FrameView* childFrameView = static_cast<FrameView*>(widget());
102    RenderView* childRoot = childFrameView ? static_cast<RenderView*>(childFrameView->frame()->contentRenderer()) : 0;
103    HTMLFrameElement* element = static_cast<HTMLFrameElement*>(node());
104
105    // Do not expand framesets which has zero width or height
106    if (!width() || !height() || !childRoot) {
107        updateWidgetPosition();
108        if (childFrameView)
109            childFrameView->layout();
110        setNeedsLayout(false);
111        return;
112    }
113
114    // need to update to calculate min/max correctly
115    updateWidgetPosition();
116    if (childRoot->prefWidthsDirty())
117        childRoot->calcPrefWidths();
118
119    // if scrollbars are off, and the width or height are fixed
120    // we obey them and do not expand. With frame flattening
121    // no subframe much ever become scrollable.
122
123    bool isScrollable = element->scrollingMode() != ScrollbarAlwaysOff;
124
125    // make sure minimum preferred width is enforced
126    if (isScrollable || !fixedWidth || childRoot->isFrameSet())
127        setWidth(max(width(), childRoot->minPrefWidth()));
128
129    // update again to pass the width to the child frame
130    updateWidgetPosition();
131    childFrameView->layout();
132
133    // expand the frame by setting frame height = content height
134    if (isScrollable || !fixedHeight || childRoot->isFrameSet())
135        setHeight(max(height(), childFrameView->contentsHeight()));
136    if (isScrollable || !fixedWidth || childRoot->isFrameSet())
137        setWidth(max(width(), childFrameView->contentsWidth()));
138
139    updateWidgetPosition();
140
141    ASSERT(!childFrameView->layoutPending());
142    ASSERT(!childRoot->needsLayout());
143    ASSERT(!childRoot->firstChild() || !childRoot->firstChild()->firstChild() || !childRoot->firstChild()->firstChild()->needsLayout());
144
145    setNeedsLayout(false);
146}
147
148} // namespace WebCore
149