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, 412 insertions, 0 deletions

diff --git a/khtml/rendering/render_flow.cpp b/khtml/rendering/render_flow.cpp
new file mode 100644
index 000000000..88e06aab9
--- /dev/null
+++ b/khtml/rendering/render_flow.cpp
@@ -0,0 +1,412 @@
+/**
+ * This file is part of the html renderer for KDE.
+ *
+ * Copyright (C) 1999-2003 Lars Knoll ([email protected])
+ *           (C) 1999-2003 Antti Koivisto ([email protected])
+ *           (C) 2002-2003 Dirk Mueller ([email protected])
+ *           (C) 2003-2006 Apple Computer, Inc.
+ *
+ * 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 <kdebug.h>
+#include <assert.h>
+#include <qpainter.h>
+#include <kglobal.h>
+
+#include "rendering/render_flow.h"
+#include "rendering/render_text.h"
+#include "rendering/render_table.h"
+#include "rendering/render_canvas.h"
+#include "rendering/render_inline.h"
+#include "rendering/render_block.h"
+#include "rendering/render_arena.h"
+#include "rendering/render_line.h"
+#include "xml/dom_nodeimpl.h"
+#include "xml/dom_docimpl.h"
+#include "misc/htmltags.h"
+#include "html/html_formimpl.h"
+
+#include "khtmlview.h"
+
+using namespace DOM;
+using namespace khtml;
+
+RenderFlow* RenderFlow::createFlow(DOM::NodeImpl* node, RenderStyle* style, RenderArena* arena)
+{
+    RenderFlow* result;
+    if (style->display() == INLINE)
+        result = new (arena) RenderInline(node);
+    else
+        result = new (arena) RenderBlock(node);
+    result->setStyle(style);
+    return result;
+}
+
+RenderFlow* RenderFlow::continuationBefore(RenderObject* beforeChild)
+{
+    if (beforeChild && beforeChild->parent() == this)
+        return this;
+
+    RenderFlow* curr = continuation();
+    RenderFlow* nextToLast = this;
+    RenderFlow* last = this;
+    while (curr) {
+        if (beforeChild && beforeChild->parent() == curr) {
+            if (curr->firstChild() == beforeChild)
+                return last;
+            return curr;
+        }
+
+        nextToLast = last;
+        last = curr;
+        curr = curr->continuation();
+    }
+
+    if (!beforeChild && !last->firstChild())
+        return nextToLast;
+    return last;
+}
+
+void RenderFlow::addChildWithContinuation(RenderObject* newChild, RenderObject* beforeChild)
+{
+    RenderFlow* flow = continuationBefore(beforeChild);
+    while(beforeChild && beforeChild->parent() != flow && !beforeChild->parent()->isAnonymousBlock()) {
+        // skip implicit containers around beforeChild
+        beforeChild = beforeChild->parent();
+    }
+    RenderFlow* beforeChildParent = beforeChild ? static_cast<RenderFlow*>(beforeChild->parent()) :
+                                    (flow->continuation() ? flow->continuation() : flow);
+
+    if (newChild->isFloatingOrPositioned())
+        return beforeChildParent->addChildToFlow(newChild, beforeChild);
+
+    // A continuation always consists of two potential candidates: an inline or an anonymous
+    // block box holding block children.
+    bool childInline = newChild->isInline();
+    bool bcpInline = beforeChildParent->isInline();
+    bool flowInline = flow->isInline();
+
+    if (flow == beforeChildParent)
+        return flow->addChildToFlow(newChild, beforeChild);
+    else {
+        // The goal here is to match up if we can, so that we can coalesce and create the
+        // minimal # of continuations needed for the inline.
+        if (childInline == bcpInline)
+            return beforeChildParent->addChildToFlow(newChild, beforeChild);
+        else if (flowInline == childInline)
+            return flow->addChildToFlow(newChild, 0); // Just treat like an append.
+        else
+            return beforeChildParent->addChildToFlow(newChild, beforeChild);
+    }
+}
+
+void RenderFlow::addChild(RenderObject *newChild, RenderObject *beforeChild)
+{
+#ifdef DEBUG_LAYOUT
+    kdDebug( 6040 ) << renderName() << "(RenderFlow)::addChild( " << newChild->renderName() <<
+                       ", " << (beforeChild ? beforeChild->renderName() : "0") << " )" << endl;
+    kdDebug( 6040 ) << "current height = " << m_height << endl;
+#endif
+
+    if (continuation())
+        return addChildWithContinuation(newChild, beforeChild);
+    return addChildToFlow(newChild, beforeChild);
+}
+
+void RenderFlow::deleteInlineBoxes(RenderArena* arena)
+{
+    RenderBox::deleteInlineBoxes(arena); //In case we upcalled
+                                         //during construction
+    if (m_firstLineBox) {
+        if (!arena)
+            arena = renderArena();
+        InlineRunBox *curr=m_firstLineBox, *next=0;
+        while (curr) {
+            next = curr->nextLineBox();
+            curr->detach(arena);
+            curr = next;
+        }
+        m_firstLineBox = 0;
+        m_lastLineBox = 0;
+    }
+}
+
+void RenderFlow::deleteLastLineBox(RenderArena* arena)
+{
+    if (m_lastLineBox) {
+        if (!arena)
+            arena = renderArena();
+        InlineRunBox *curr=m_lastLineBox, *prev = m_lastLineBox;
+        if (m_firstLineBox == m_lastLineBox)
+            m_firstLineBox = m_lastLineBox = 0;
+        else {
+            prev = curr->prevLineBox();
+            while (!prev->isInlineFlowBox()) {
+                prev = prev->prevLineBox();
+                prev->detach(arena);
+            }
+            m_lastLineBox = static_cast<InlineFlowBox*>(prev);
+            prev->setNextLineBox(0);
+        }
+        if (curr->parent()) {
+            curr->parent()->removeFromLine(curr);
+        }
+        curr->detach(arena);
+    }
+}
+
+InlineBox* RenderFlow::createInlineBox(bool makePlaceHolderBox, bool isRootLineBox)
+{
+    if ( !isRootLineBox &&
+         (isReplaced() || makePlaceHolderBox) )       // Inline tables and inline blocks
+         return RenderBox::createInlineBox(false, false);    // (or positioned element placeholders).
+
+    InlineFlowBox* flowBox = 0;
+    if (isInlineFlow())
+        flowBox = new (renderArena()) InlineFlowBox(this);
+    else
+        flowBox = new (renderArena()) RootInlineBox(this);
+
+    if (!m_firstLineBox) {
+        m_firstLineBox = m_lastLineBox = flowBox;
+    } else {
+        m_lastLineBox->setNextLineBox(flowBox);
+        flowBox->setPreviousLineBox(m_lastLineBox);
+        m_lastLineBox = flowBox;
+    }
+
+    return flowBox;
+}
+
+void RenderFlow::paintLines(PaintInfo& i, int _tx, int _ty)
+{
+    // Only paint during the foreground/selection phases.
+    if (i.phase != PaintActionForeground && i.phase != PaintActionSelection && i.phase != PaintActionOutline)
+        return;
+
+    if (!firstLineBox())
+        return;
+
+    // We can check the first box and last box and avoid painting if we don't
+    // intersect.  This is a quick short-circuit that we can take to avoid walking any lines.
+    // FIXME: This check is flawed in two extremely obscure ways.
+    // (1) If some line in the middle has a huge overflow, it might actually extend below the last line.
+    // (2) The overflow from an inline block on a line is not reported to the line.
+    int maxOutlineSize = maximalOutlineSize(i.phase);
+    int yPos = firstLineBox()->root()->topOverflow() - maxOutlineSize;
+    int h = maxOutlineSize + lastLineBox()->root()->bottomOverflow() - yPos;
+    yPos += _ty;
+    if ((yPos >= i.r.y() + i.r.height()) || (yPos + h <= i.r.y()))
+        return;
+    for (InlineFlowBox* curr = firstLineBox(); curr; curr = curr->nextFlowBox()) {
+        yPos = curr->root()->topOverflow() - maxOutlineSize;
+        h = curr->root()->bottomOverflow() + maxOutlineSize - yPos;
+        yPos += _ty;
+        if ((yPos < i.r.y() + i.r.height()) && (yPos + h > i.r.y()))
+            curr->paint(i, _tx, _ty);
+    }
+
+    if (i.phase == PaintActionOutline && i.outlineObjects) {
+          QValueList<RenderFlow *>::iterator it;;
+          for( it = (*i.outlineObjects).begin(); it != (*i.outlineObjects).end(); ++it )
+              if ((*it)->isRenderInline())
+                  static_cast<RenderInline*>(*it)->paintOutlines(i.p, _tx, _ty);
+          i.outlineObjects->clear();
+    }
+}
+
+
+bool RenderFlow::hitTestLines(NodeInfo& i, int x, int y, int tx, int ty, HitTestAction hitTestAction)
+{
+   (void) hitTestAction;
+   /*
+    if (hitTestAction != HitTestForeground) // ### port hitTest
+        return false;
+   */
+
+    if (!firstLineBox())
+        return false;
+
+    // We can check the first box and last box and avoid hit testing if we don't
+    // contain the point.  This is a quick short-circuit that we can take to avoid walking any lines.
+    // FIXME: This check is flawed in two extremely obscure ways.
+    // (1) If some line in the middle has a huge overflow, it might actually extend below the last line.
+    // (2) The overflow from an inline block on a line is not reported to the line.
+    if ((y >= ty + lastLineBox()->root()->bottomOverflow()) || (y < ty + firstLineBox()->root()->topOverflow()))
+        return false;
+
+    // See if our root lines contain the point.  If so, then we hit test
+    // them further.  Note that boxes can easily overlap, so we can't make any assumptions
+    // based off positions of our first line box or our last line box.
+    for (InlineFlowBox* curr = lastLineBox(); curr; curr = curr->prevFlowBox()) {
+        if (y >= ty + curr->root()->topOverflow() && y < ty + curr->root()->bottomOverflow()) {
+            bool inside = curr->nodeAtPoint(i, x, y, tx, ty);
+            if (inside) {
+                setInnerNode(i);
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+
+void RenderFlow::repaint(Priority prior)
+{
+    if (isInlineFlow()) {
+        // Find our leftmost position.
+        int left = 0;
+        // root inline box not reliably availabe during relayout
+        int top = firstLineBox() ? (
+                needsLayout() ? firstLineBox()->xPos() : firstLineBox()->root()->topOverflow()
+            ) : 0;
+        for (InlineRunBox* curr = firstLineBox(); curr; curr = curr->nextLineBox())
+            if (curr == firstLineBox() || curr->xPos() < left)
+                left = curr->xPos();
+
+        // Now invalidate a rectangle.
+        int ow = style() ? style()->outlineSize() : 0;
+
+        // We need to add in the relative position offsets of any inlines (including us) up to our
+        // containing block.
+        RenderBlock* cb = containingBlock();
+        for (RenderObject* inlineFlow = this; inlineFlow && inlineFlow->isInlineFlow() && inlineFlow != cb;
+             inlineFlow = inlineFlow->parent()) {
+             if (inlineFlow->style() && inlineFlow->style()->position() == RELATIVE && inlineFlow->layer()) {
+                KHTMLAssert(inlineFlow->isBox());
+                static_cast<RenderBox*>(inlineFlow)->relativePositionOffset(left, top);
+             }
+        }
+
+        RootInlineBox *lastRoot = lastLineBox() && !needsLayout() ? lastLineBox()->root() : 0;
+        containingBlock()->repaintRectangle(-ow+left, -ow+top,
+                                            width()+ow*2,
+					    (lastRoot ? lastRoot->bottomOverflow() - top : height())+ow*2, prior);
+    }
+    else {
+        if (firstLineBox() && firstLineBox()->topOverflow() < 0) {
+            int ow = style() ? style()->outlineSize() : 0;
+            repaintRectangle(-ow, -ow+firstLineBox()->topOverflow(),
+                             effectiveWidth()+ow*2, effectiveHeight()+ow*2, prior);
+        }
+        else
+            return RenderBox::repaint(prior);
+    }
+}
+
+int
+RenderFlow::lowestPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+    int bottom = RenderBox::lowestPosition(includeOverflowInterior, includeSelf);
+    if (!includeOverflowInterior && hasOverflowClip())
+        return bottom;
+
+    // FIXME: Come up with a way to use the layer tree to avoid visiting all the kids.
+    // For now, we have to descend into all the children, since we may have a huge abs div inside
+    // a tiny rel div buried somewhere deep in our child tree.  In this case we have to get to
+    // the abs div.
+    for (RenderObject *c = firstChild(); c; c = c->nextSibling()) {
+        if (!c->isFloatingOrPositioned() && !c->isText() && !c->isInlineFlow()) {
+            int lp = c->yPos() + c->lowestPosition(false);
+            bottom = kMax(bottom, lp);
+        }
+    }
+
+    if (isRelPositioned()) {
+        int x;
+        relativePositionOffset(x, bottom);
+    }
+
+    return bottom;
+}
+
+int RenderFlow::rightmostPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+    int right = RenderBox::rightmostPosition(includeOverflowInterior, includeSelf);
+    if (!includeOverflowInterior && hasOverflowClip())
+        return right;
+
+    // FIXME: Come up with a way to use the layer tree to avoid visiting all the kids.
+    // For now, we have to descend into all the children, since we may have a huge abs div inside
+    // a tiny rel div buried somewhere deep in our child tree.  In this case we have to get to
+    // the abs div.
+    for (RenderObject *c = firstChild(); c; c = c->nextSibling()) {
+        if (!c->isFloatingOrPositioned() && !c->isText() && !c->isInlineFlow()) {
+            int rp = c->xPos() + c->rightmostPosition(false);
+            right = kMax(right, rp);
+        }
+    }
+
+    if (isRelPositioned()) {
+        int y;
+        relativePositionOffset(right, y);
+    }
+
+    return right;
+}
+
+int RenderFlow::leftmostPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+    int left = RenderBox::leftmostPosition(includeOverflowInterior, includeSelf);
+    if (!includeOverflowInterior && hasOverflowClip())
+        return left;
+
+    // FIXME: Come up with a way to use the layer tree to avoid visiting all the kids.
+    // For now, we have to descend into all the children, since we may have a huge abs div inside
+    // a tiny rel div buried somewhere deep in our child tree.  In this case we have to get to
+    // the abs div.
+    for (RenderObject *c = firstChild(); c; c = c->nextSibling()) {
+        if (!c->isFloatingOrPositioned() && !c->isText() && !c->isInlineFlow()) {
+            int lp = c->xPos() + c->leftmostPosition(false);
+            left = kMin(left, lp);
+        }
+    }
+
+    if (isRelPositioned()) {
+        int y;
+        relativePositionOffset(left, y);
+    }
+
+    return left;
+}
+
+int RenderFlow::highestPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+    int top = RenderBox::highestPosition(includeOverflowInterior, includeSelf);
+    if (!includeOverflowInterior && hasOverflowClip())
+        return top;
+
+    // FIXME: Come up with a way to use the layer tree to avoid visiting all the kids.
+    // For now, we have to descend into all the children, since we may have a huge abs div inside
+    // a tiny rel div buried somewhere deep in our child tree.  In this case we have to get to
+    // the abs div.
+    for (RenderObject *c = firstChild(); c; c = c->nextSibling()) {
+        if (!c->isFloatingOrPositioned() && !c->isText() && !c->isInlineFlow()) {
+            int hp = c->yPos() + c->highestPosition(false);
+            top = kMin(top, hp);
+        }
+    }
+
+    if (isRelPositioned()) {
+        int x;
+        relativePositionOffset(x, top);
+    }
+
+    return top;
+}