Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 780 insertions, 0 deletions

diff --git a/khtml/rendering/render_canvas.cpp b/khtml/rendering/render_canvas.cpp
new file mode 100644
index 000000000..50cad914a
--- /dev/null
+++ b/khtml/rendering/render_canvas.cpp
@@ -0,0 +1,780 @@
+/**
+ * This file is part of the HTML widget for KDE.
+ *
+ * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ *           (C) 2003 Apple Computer, Inc.
+ *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+
+#include "rendering/render_canvas.h"
+#include "rendering/render_layer.h"
+#include "xml/dom_docimpl.h"
+
+#include "khtmlview.h"
+#include "khtml_part.h"
+#include <kdebug.h>
+#include <kglobal.h>
+
+using namespace khtml;
+
+//#define BOX_DEBUG
+//#define SPEED_DEBUG
+
+RenderCanvas::RenderCanvas(DOM::NodeImpl* node, KHTMLView *view)
+    : RenderBlock(node)
+{
+    // init RenderObject attributes
+    setInline(false);
+    setIsAnonymous(false);
+
+    m_view = view;
+    // try to contrain the width to the views width
+
+    m_minWidth = 0;
+    m_height = 0;
+
+    m_width = m_minWidth;
+    m_maxWidth = m_minWidth;
+
+    m_rootWidth = m_rootHeight = 0;
+    m_viewportWidth = m_viewportHeight = 0;
+    m_cachedDocWidth = m_cachedDocHeight = -1;
+
+    setPositioned(true); // to 0,0 :)
+
+    m_staticMode = false;
+    m_pagedMode = false;
+    m_printImages = true;
+
+    m_pageTop = 0;
+    m_pageBottom = 0;
+
+    m_page = 0;
+
+    m_maximalOutlineSize = 0;
+
+    m_selectionStart = 0;
+    m_selectionEnd = 0;
+    m_selectionStartPos = -1;
+    m_selectionEndPos = -1;
+
+    m_needsWidgetMasks = false;
+
+    // Create a new root layer for our layer hierarchy.
+    m_layer = new (node->getDocument()->renderArena()) RenderLayer(this);
+}
+
+RenderCanvas::~RenderCanvas()
+{
+    delete m_page;
+}
+
+void RenderCanvas::setStyle(RenderStyle* style)
+{
+    /*
+    if (m_pagedMode)
+        style->setOverflow(OHIDDEN); */
+    RenderBlock::setStyle(style);
+}
+
+void RenderCanvas::calcHeight()
+{
+    if (m_pagedMode || !m_view)
+        m_height = m_rootHeight;
+    else
+        m_height = m_view->visibleHeight();
+}
+
+void RenderCanvas::calcWidth()
+{
+    // the width gets set by KHTMLView::print when printing to a printer.
+    if(m_pagedMode || !m_view)
+    {
+        m_width = m_rootWidth;
+        return;
+    }
+
+    m_width = m_view ? m_view->frameWidth() : m_minWidth;
+
+    if (style()->marginLeft().isFixed())
+        m_marginLeft = style()->marginLeft().value();
+    else
+        m_marginLeft = 0;
+
+    if (style()->marginRight().isFixed())
+        m_marginRight = style()->marginRight().value();
+    else
+        m_marginRight = 0;
+}
+
+void RenderCanvas::calcMinMaxWidth()
+{
+    KHTMLAssert( !minMaxKnown() );
+
+    RenderBlock::calcMinMaxWidth();
+
+    m_maxWidth = m_minWidth;
+
+    setMinMaxKnown();
+}
+
+//#define SPEED_DEBUG
+
+void RenderCanvas::layout()
+{
+    if (m_pagedMode) {
+       m_minWidth = m_width;
+//        m_maxWidth = m_width;
+    }
+
+    m_needsFullRepaint =  markedForRepaint() || !view() || view()->needsFullRepaint() || m_pagedMode;
+
+    setChildNeedsLayout(true);
+    setMinMaxKnown(false);
+    for(RenderObject* c = firstChild(); c; c = c->nextSibling())
+        c->setChildNeedsLayout(true);
+
+    int oldWidth = m_width;
+    int oldHeight = m_height;
+
+    m_cachedDocWidth = m_cachedDocHeight = -1;
+
+    if (m_pagedMode || !m_view) {
+        m_width = m_rootWidth;
+        m_height = m_rootHeight;
+    }
+    else
+    {
+        m_viewportWidth = m_width = m_view->visibleWidth();
+        m_viewportHeight = m_height = m_view->visibleHeight();
+    }
+
+#ifdef SPEED_DEBUG
+    QTime qt;
+    qt.start();
+#endif
+
+    if ( recalcMinMax() )
+	recalcMinMaxWidths();
+
+#ifdef SPEED_DEBUG
+    kdDebug() << "RenderCanvas::calcMinMax time used=" << qt.elapsed() << endl;
+    qt.start();
+#endif
+
+    bool relayoutChildren = (oldWidth != m_width) || (oldHeight != m_height);
+
+    RenderBlock::layoutBlock( relayoutChildren );
+
+#ifdef SPEED_DEBUG
+    kdDebug() << "RenderCanvas::layout time used=" << qt.elapsed() << endl;
+    qt.start();
+#endif
+
+    updateDocumentSize();
+
+    layer()->updateLayerPositions( layer(), needsFullRepaint(), true );
+
+    if (!m_pagedMode && m_needsWidgetMasks)
+        layer()->updateWidgetMasks(layer());
+
+    scheduleDeferredRepaints();
+    setNeedsLayout(false);
+
+#ifdef SPEED_DEBUG
+    kdDebug() << "RenderCanvas::end time used=" << qt.elapsed() << endl;
+#endif
+}
+
+void RenderCanvas::updateDocumentSize()
+{
+     // update our cached document size
+    int hDocH = m_cachedDocHeight = docHeight();
+    int hDocW = m_cachedDocWidth = docWidth();
+
+    if (!m_pagedMode && m_view) {
+
+        bool vss = m_view->verticalScrollBar()->isShown();
+        bool hss = m_view->horizontalScrollBar()->isShown();
+        QSize s = m_view->viewportSize(m_cachedDocWidth, m_cachedDocHeight);
+
+        // if we are about to show a scrollbar, and the document is sized to the viewport w or h,
+        // then reserve the scrollbar space so that it doesn't trigger the _other_ scrollbar
+
+        if (!vss && m_width - m_view->verticalScrollBar()->sizeHint().width() == s.width() &&
+            m_cachedDocWidth <= m_width)
+            hDocW = kMin( m_cachedDocWidth, s.width() );
+
+        if (!hss && m_height - m_view->horizontalScrollBar()->sizeHint().height() == s.height() &&
+            m_cachedDocHeight <= m_height)
+            hDocH = kMin( m_cachedDocHeight, s.height() );
+
+        // likewise, if a scrollbar is shown, and we have a cunning plan to turn it off,
+        // think again if we are falling downright in the hysteresis zone
+
+        if (vss && s.width() > m_cachedDocWidth && m_cachedDocWidth > m_view->visibleWidth())
+            hDocW = s.width()+1;
+
+        if (hss && s.height() > m_cachedDocHeight && m_cachedDocHeight > m_view->visibleHeight())
+            hDocH = s.height()+1;
+
+        m_view->resizeContents(hDocW, hDocH);
+
+        setWidth( m_viewportWidth = s.width() );
+        setHeight( m_viewportHeight = s.height() );
+    }
+    layer()->resize( kMax( m_cachedDocWidth,int( m_width ) ), kMax( m_cachedDocHeight,m_height ) );
+}
+
+void RenderCanvas::updateDocSizeAfterLayerTranslation( RenderObject* o, bool posXOffset, bool posYOffset )
+{
+    if (needsLayout())
+        return;
+    int rightmost, lowest;
+    o->absolutePosition( rightmost, lowest );
+    if (posXOffset) {
+        rightmost += o->rightmostPosition(false, true);
+        setCachedDocWidth( kMax(docWidth(), rightmost) );
+    } else {
+        setCachedDocWidth( -1 );
+    }
+    if (posYOffset) {
+        lowest += o->lowestPosition(false, true);
+        setCachedDocHeight( kMax(docHeight(), lowest) );
+    } else {
+        setCachedDocHeight( -1 );
+    }
+//    kdDebug() << " posXOffset: " << posXOffset << " posYOffset " << posYOffset << " m_cachedDocWidth  " <<  m_cachedDocWidth << " m_cachedDocHeight  " << m_cachedDocHeight << endl;
+    updateDocumentSize();
+}
+
+bool RenderCanvas::needsFullRepaint() const
+{
+    return m_needsFullRepaint || m_pagedMode;
+}
+
+void RenderCanvas::repaintViewRectangle(int x, int y, int w, int h, bool asap)
+{
+  KHTMLAssert( view() );
+  view()->scheduleRepaint( x, y, w, h, asap );
+}
+
+bool RenderCanvas::absolutePosition(int &xPos, int &yPos, bool f) const
+{
+    if ( f && m_pagedMode) {
+        xPos = 0;
+        yPos = m_pageTop;
+    }
+    else if ( f && m_view) {
+        xPos = m_view->contentsX();
+        yPos = m_view->contentsY();
+    }
+    else {
+        xPos = yPos = 0;
+    }
+    return true;
+}
+
+void RenderCanvas::paint(PaintInfo& paintInfo, int _tx, int _ty)
+{
+#ifdef DEBUG_LAYOUT
+    kdDebug( 6040 ) << renderName() << this << " ::paintObject() w/h = (" << width() << "/" << height() << ")" << endl;
+#endif
+
+    // 1. paint background, borders etc
+    if(paintInfo.phase == PaintActionElementBackground) {
+        paintBoxDecorations(paintInfo, _tx, _ty);
+        return;
+    }
+
+    // 2. paint contents
+    for( RenderObject *child = firstChild(); child; child=child->nextSibling())
+        if(!child->layer() && !child->isFloating())
+            child->paint(paintInfo, _tx, _ty);
+
+    // 3. paint floats.
+    if (paintInfo.phase == PaintActionFloat)
+        paintFloats(paintInfo, _tx, _ty);
+
+#ifdef BOX_DEBUG
+    if (m_view)
+    {
+        _tx += m_view->contentsX();
+        _ty += m_view->contentsY();
+    }
+
+    outlineBox(p, _tx, _ty);
+#endif
+
+}
+
+void RenderCanvas::paintBoxDecorations(PaintInfo& paintInfo, int /*_tx*/, int /*_ty*/)
+{
+    if ((firstChild() && firstChild()->style()->visibility() == VISIBLE) || !view())
+        return;
+
+    paintInfo.p->fillRect(paintInfo.r, view()->palette().active().color(QColorGroup::Base));
+}
+
+void RenderCanvas::repaintRectangle(int x, int y, int w, int h, Priority p, bool f)
+{
+    if (m_staticMode) return;
+//    kdDebug( 6040 ) << "updating views contents (" << x << "/" << y << ") (" << w << "/" << h << ")" << endl;
+
+    if (f && m_pagedMode) {
+        y += m_pageTop;
+    } else
+    if ( f && m_view ) {
+        x += m_view->contentsX();
+        y += m_view->contentsY();
+    }
+
+    QRect vr = viewRect();
+    QRect ur(x, y, w, h);
+
+    if (m_view && ur.intersects(vr)) {
+
+        if (p == RealtimePriority)
+	// ### KWQ's updateContents has an additional parameter "now".
+	// It's not clear what the difference between updateContents(...,true)
+	// and repaintContents(...) is. As Qt doesn't have this, I'm leaving it out. (LS)
+            m_view->updateContents(ur/*, true*/);
+        else if (p == HighPriority)
+            m_view->scheduleRepaint(x, y, w, h, true /*asap*/);
+        else
+            m_view->scheduleRepaint(x, y, w, h);
+    }
+}
+
+void RenderCanvas::deferredRepaint( RenderObject* o )
+{
+    m_dirtyChildren.append( o );
+}
+
+void RenderCanvas::scheduleDeferredRepaints()
+{
+    if (!needsFullRepaint()) {
+        QValueList<RenderObject*>::const_iterator it;
+        for ( it = m_dirtyChildren.begin(); it != m_dirtyChildren.end(); ++it )
+            (*it)->repaint();
+    }
+    //kdDebug(6040) << "scheduled deferred repaints: " << m_dirtyChildren.count() << " needed full repaint: " << needsFullRepaint() << endl;
+    m_dirtyChildren.clear();
+}
+
+void RenderCanvas::repaint(Priority p)
+{
+    if (m_view && !m_staticMode) {
+        if (p == RealtimePriority) {
+            //m_view->resizeContents(docWidth(), docHeight());
+            m_view->unscheduleRepaint();
+            if (needsLayout()) {
+                m_view->scheduleRelayout();
+                return;
+            }
+	    // ### same as in repaintRectangle
+            m_view->updateContents(m_view->contentsX(), m_view->contentsY(),
+                                   m_view->visibleWidth(), m_view->visibleHeight()/*, true*/);
+        }
+        else if (p == HighPriority)
+            m_view->scheduleRepaint(m_view->contentsX(), m_view->contentsY(),
+                                    m_view->visibleWidth(), m_view->visibleHeight(), true /*asap*/);
+        else
+            m_view->scheduleRepaint(m_view->contentsX(), m_view->contentsY(),
+                                    m_view->visibleWidth(), m_view->visibleHeight());
+    }
+}
+
+static QRect enclosingPositionedRect (RenderObject *n)
+{
+    RenderObject *enclosingParent =  n->containingBlock();
+    QRect rect(0,0,0,0);
+    if (enclosingParent) {
+        int ox, oy;
+        enclosingParent->absolutePosition(ox, oy);
+        int off = 0;
+        if (!enclosingParent->hasOverflowClip()) {
+            ox += enclosingParent->overflowLeft();
+            oy += enclosingParent->overflowTop();
+        }
+        rect.setX(ox);
+        rect.setY(oy);
+        rect.setWidth(enclosingParent->effectiveWidth());
+        rect.setHeight(enclosingParent->effectiveHeight());
+    }
+    return rect;
+}
+
+QRect RenderCanvas::selectionRect() const
+{
+    RenderObject *r = m_selectionStart;
+    if (!r)
+        return QRect();
+
+    QRect selectionRect = enclosingPositionedRect(r);
+
+    while (r && r != m_selectionEnd)
+    {
+        RenderObject* n;
+        if ( !(n = r->firstChild()) ){
+            if ( !(n = r->nextSibling()) )
+            {
+                n = r->parent();
+                while (n && !n->nextSibling())
+                    n = n->parent();
+                if (n)
+                    n = n->nextSibling();
+            }
+        }
+        r = n;
+        if (r) {
+            selectionRect = selectionRect.unite(enclosingPositionedRect(r));
+        }
+    }
+
+    return selectionRect;
+}
+
+void RenderCanvas::setSelection(RenderObject *s, int sp, RenderObject *e, int ep)
+{
+    // Check we got valid renderobjects. www.msnbc.com and clicking
+    // around, to find the case where this happened.
+    if ( !s || !e )
+    {
+        kdWarning(6040) << "RenderCanvas::setSelection() called with start=" << s << " end=" << e << endl;
+        return;
+    }
+//     kdDebug( 6040 ) << "RenderCanvas::setSelection(" << s << "," << sp << "," << e << "," << ep << ")" << endl;
+
+    bool changedSelectionBorder = ( s != m_selectionStart || e != m_selectionEnd );
+
+    // Cut out early if the selection hasn't changed.
+    if ( !changedSelectionBorder && m_selectionStartPos == sp && m_selectionEndPos == ep )
+        return;
+
+    // Record the old selected objects.  Will be used later
+    // to delta against the selected objects.
+
+    RenderObject *oldStart = m_selectionStart;
+    int oldStartPos = m_selectionStartPos;
+    RenderObject *oldEnd = m_selectionEnd;
+    int oldEndPos = m_selectionEndPos;
+    QPtrList<RenderObject> oldSelectedInside;
+    QPtrList<RenderObject> newSelectedInside;
+    RenderObject *os = oldStart;
+
+    while (os && os != oldEnd)
+    {
+        RenderObject* no;
+        if ( !(no = os->firstChild()) ){
+            if ( !(no = os->nextSibling()) )
+            {
+                no = os->parent();
+                while (no && !no->nextSibling())
+                    no = no->parent();
+                if (no)
+                    no = no->nextSibling();
+            }
+        }
+        if (os->selectionState() == SelectionInside && !oldSelectedInside.containsRef(os))
+            oldSelectedInside.append(os);
+
+        os = no;
+    }
+    if (changedSelectionBorder)
+        clearSelection(false);
+
+    while (s->firstChild())
+        s = s->firstChild();
+    while (e->lastChild())
+        e = e->lastChild();
+
+#if 0
+    bool changedSelectionBorder = ( s != m_selectionStart || e != m_selectionEnd );
+
+    if ( !changedSelectionBorder && m_selectionStartPos == sp && m_selectionEndPos = ep )
+        return;
+#endif
+
+    // set selection start
+    if (m_selectionStart)
+        m_selectionStart->setIsSelectionBorder(false);
+    m_selectionStart = s;
+    if (m_selectionStart)
+        m_selectionStart->setIsSelectionBorder(true);
+    m_selectionStartPos = sp;
+
+    // set selection end
+    if (m_selectionEnd)
+        m_selectionEnd->setIsSelectionBorder(false);
+    m_selectionEnd = e;
+    if (m_selectionEnd)
+        m_selectionEnd->setIsSelectionBorder(true);
+    m_selectionEndPos = ep;
+
+#if 0
+    kdDebug( 6040 ) << "old selection (" << oldStart << "," << oldStartPos << "," << oldEnd << "," << oldEndPos << ")" << endl;
+    kdDebug( 6040 ) << "new selection (" << s << "," << sp << "," << e << "," << ep << ")" << endl;
+#endif
+
+    // update selection status of all objects between m_selectionStart and m_selectionEnd
+    RenderObject* o = s;
+
+    while (o && o!=e)
+    {
+        o->setSelectionState(SelectionInside);
+//      kdDebug( 6040 ) << "setting selected " << o << ", " << o->isText() << endl;
+        RenderObject* no;
+        if ( !(no = o->firstChild()) )
+            if ( !(no = o->nextSibling()) )
+            {
+                no = o->parent();
+                while (no && !no->nextSibling())
+                    no = no->parent();
+                if (no)
+                    no = no->nextSibling();
+            }
+        if (o->selectionState() == SelectionInside && !newSelectedInside.containsRef(o))
+            newSelectedInside.append(o);
+
+        o=no;
+    }
+    s->setSelectionState(SelectionStart);
+    e->setSelectionState(SelectionEnd);
+    if(s == e) s->setSelectionState(SelectionBoth);
+
+    if (!m_view)
+        return;
+
+    newSelectedInside.removeRef(s);
+    newSelectedInside.removeRef(e);
+
+    QRect updateRect;
+
+    // Don't use repaint() because it will cause all rects to
+    // be united (see khtmlview::scheduleRepaint()).  Instead
+    // just draw damage rects for objects that have a change
+    // in selection state.
+    // ### for Qt, updateContents will unite them, too. This has to be
+    // circumvented somehow (LS)
+
+    // Are any of the old fully selected objects not in the new selection?
+    // If so we have to draw them.
+    // Could be faster by building list of non-intersecting rectangles rather
+    // than unioning rectangles.
+    QPtrListIterator<RenderObject> oldIterator(oldSelectedInside);
+    bool firstRect = true;
+    for (; oldIterator.current(); ++oldIterator){
+        if (!newSelectedInside.containsRef(oldIterator.current())){
+            if (firstRect){
+                updateRect = enclosingPositionedRect(oldIterator.current());
+                firstRect = false;
+            }
+            else
+                updateRect = updateRect.unite(enclosingPositionedRect(oldIterator.current()));
+        }
+    }
+    if (!firstRect){
+        m_view->updateContents( updateRect );
+    }
+
+    // Are any of the new fully selected objects not in the previous selection?
+    // If so we have to draw them.
+    // Could be faster by building list of non-intersecting rectangles rather
+    // than unioning rectangles.
+    QPtrListIterator<RenderObject> newIterator(newSelectedInside);
+    firstRect = true;
+    for (; newIterator.current(); ++newIterator){
+        if (!oldSelectedInside.containsRef(newIterator.current())){
+            if (firstRect){
+                updateRect = enclosingPositionedRect(newIterator.current());
+                firstRect = false;
+            }
+            else
+                updateRect = updateRect.unite(enclosingPositionedRect(newIterator.current()));
+        }
+    }
+    if (!firstRect) {
+        m_view->updateContents( updateRect );
+    }
+
+    // Is the new starting object different, or did the position in the starting
+    // element change?  If so we have to draw it.
+    if (oldStart != m_selectionStart ||
+        (oldStart == oldEnd && (oldStartPos != m_selectionStartPos || oldEndPos != m_selectionEndPos)) ||
+        (oldStart == m_selectionStart && oldStartPos != m_selectionStartPos)){
+        m_view->updateContents( enclosingPositionedRect(m_selectionStart) );
+    }
+
+    // Draw the old selection start object if it's different than the new selection
+    // start object.
+    if (oldStart && oldStart != m_selectionStart){
+        m_view->updateContents( enclosingPositionedRect(oldStart) );
+    }
+
+    // Does the selection span objects and is the new end object different, or did the position
+    // in the end element change?  If so we have to draw it.
+    if (/*(oldStart != oldEnd || !oldEnd) &&*/
+        (oldEnd != m_selectionEnd ||
+        (oldEnd == m_selectionEnd && oldEndPos != m_selectionEndPos))){
+        m_view->updateContents( enclosingPositionedRect(m_selectionEnd) );
+    }
+
+    // Draw the old selection end object if it's different than the new selection
+    // end object.
+    if (oldEnd && oldEnd != m_selectionEnd){
+        m_view->updateContents( enclosingPositionedRect(oldEnd) );
+    }
+}
+
+void RenderCanvas::clearSelection(bool doRepaint)
+{
+    // update selection status of all objects between m_selectionStart and m_selectionEnd
+    RenderObject* o = m_selectionStart;
+    while (o && o!=m_selectionEnd)
+    {
+        if (o->selectionState()!=SelectionNone)
+            if (doRepaint)
+                o->repaint();
+        o->setSelectionState(SelectionNone);
+        o->repaint();
+        RenderObject* no;
+        if ( !(no = o->firstChild()) )
+            if ( !(no = o->nextSibling()) )
+            {
+                no = o->parent();
+                while (no && !no->nextSibling())
+                    no = no->parent();
+                if (no)
+                    no = no->nextSibling();
+            }
+        o=no;
+    }
+    if (m_selectionEnd) {
+        m_selectionEnd->setSelectionState(SelectionNone);
+        if (doRepaint)
+            m_selectionEnd->repaint();
+    }
+
+    // set selection start & end to 0
+    if (m_selectionStart)
+        m_selectionStart->setIsSelectionBorder(false);
+    m_selectionStart = 0;
+    m_selectionStartPos = -1;
+
+    if (m_selectionEnd)
+        m_selectionEnd->setIsSelectionBorder(false);
+    m_selectionEnd = 0;
+    m_selectionEndPos = -1;
+}
+
+void RenderCanvas::selectionStartEnd(int& spos, int& epos)
+{
+    spos = m_selectionStartPos;
+    epos = m_selectionEndPos;
+}
+
+QRect RenderCanvas::viewRect() const
+{
+    if (m_pagedMode)
+        if (m_pageTop == m_pageBottom) {
+            kdDebug(6040) << "viewRect: " << QRect(0, m_pageTop, m_width, m_height) << endl;
+            return QRect(0, m_pageTop, m_width, m_height);
+        }
+        else {
+            kdDebug(6040) << "viewRect: " << QRect(0, m_pageTop, m_width, m_pageBottom - m_pageTop) << endl;
+            return QRect(0, m_pageTop, m_width, m_pageBottom - m_pageTop);
+        }
+    else if (m_view)
+        return QRect(m_view->contentsX(),
+            m_view->contentsY(),
+            m_view->visibleWidth(),
+            m_view->visibleHeight());
+    else
+        return QRect(0,0,m_rootWidth,m_rootHeight);
+}
+
+int RenderCanvas::docHeight() const
+{
+    if (m_cachedDocHeight != -1)
+        return m_cachedDocHeight;
+
+    int h;
+    if (m_pagedMode || !m_view)
+        h = m_height;
+    else
+        h = 0;
+
+    RenderObject *fc = firstChild();
+    if(fc) {
+        int dh = fc->overflowHeight() + fc->marginTop() + fc->marginBottom();
+        int lowestPos = fc->lowestPosition(false);
+// kdDebug(6040) << "h " << h << " lowestPos " << lowestPos << " dh " << dh << " fc->rh " << fc->effectiveHeight() << " fc->height() " << fc->height() << endl;
+        if( lowestPos > dh )
+            dh = lowestPos;
+        lowestPos = lowestAbsolutePosition();
+        if( lowestPos > dh )
+            dh = lowestPos;
+        if( dh > h )
+            h = dh;
+    }
+
+    RenderLayer *layer = m_layer;
+    h = kMax( h, layer->yPos() + layer->height() );
+// kdDebug(6040) << "h " << h << " layer(" << layer->renderer()->renderName() << "@" << layer->renderer() << ")->height " << layer->height() << " lp " << (layer->yPos() + layer->height()) << " height() " << layer->renderer()->height() << " rh " << layer->renderer()->effectiveHeight() << endl;
+    return h;
+}
+
+int RenderCanvas::docWidth() const
+{
+    if (m_cachedDocWidth != -1)
+        return m_cachedDocWidth;
+
+    int w;
+    if (m_pagedMode || !m_view)
+        w = m_width;
+    else
+        w = 0;
+
+    RenderObject *fc = firstChild();
+    if(fc) {
+        // ow: like effectiveWidth() but without the negative
+        const int ow = fc->hasOverflowClip() ? fc->width() : fc->overflowWidth();
+        int dw = ow + fc->marginLeft() + fc->marginRight();
+        int rightmostPos = fc->rightmostPosition(false);
+// kdDebug(6040) << "w " << w << " rightmostPos " << rightmostPos << " dw " << dw << " fc->rw " << fc->effectiveWidth() << " fc->width() " << fc->width() << endl;
+        if( rightmostPos > dw )
+            dw = rightmostPos;
+        rightmostPos = rightmostAbsolutePosition();
+        if ( rightmostPos > dw )
+            dw = rightmostPos;
+        if( dw > w )
+            w = dw;
+    }
+
+    RenderLayer *layer = m_layer;
+    w = kMax( w, layer->xPos() + layer->width() );
+// kdDebug(6040) << "w " << w << " layer(" << layer->renderer()->renderName() << ")->width " << layer->width() << " rm " << (layer->xPos() + layer->width()) << " width() " << layer->renderer()->width() << " rw " << layer->renderer()->effectiveWidth() << endl;
+    return w;
+}
+
+RenderPage* RenderCanvas::page() {
+    if (!m_page) m_page = new RenderPage(this);
+    return m_page;
+}