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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2000 Simon Hausmann <hausmann (at) kde.org>
      4  *           (C) 2000 Stefan Schimanski (1Stein (at) 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 
     37 namespace WebCore {
     38 
     39 RenderFrame::RenderFrame(HTMLFrameElement* frame)
     40     : RenderPart(frame)
     41 {
     42     setInline(false);
     43 }
     44 
     45 FrameEdgeInfo RenderFrame::edgeInfo() const
     46 {
     47     HTMLFrameElement* element = static_cast<HTMLFrameElement*>(node());
     48     return FrameEdgeInfo(element->noResize(), element->hasFrameBorder());
     49 }
     50 
     51 void 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
     69 void 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
     96 void 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