render_frames.cpp

konqueror3 embedded版本, KDE环境下的当家浏览器的嵌入式版本源码包.

/**
 * This file is part of the KDE project.
 *
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 2000 Simon Hausmann <[e-mail]>
 *           (C) 2000 Stefan Schimanski ([e-mail])
 *           (C) 2003 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.
 *
 */
//#define DEBUG_LAYOUT

#include "rendering/render_frames.h"
#include "rendering/render_canvas.h"
#include "html/html_baseimpl.h"
#include "html/html_objectimpl.h"
#include "html/htmltokenizer.h"
#include "misc/htmlattrs.h"
#include "xml/dom2_eventsimpl.h"
#include "xml/dom_docimpl.h"
#include "misc/htmltags.h"
#include "khtmlview.h"
#include "khtml_part.h"

#include <kapplication.h>
#include <kmessagebox.h>
#include <kmimetype.h>
#include <klocale.h>
#include <kdebug.h>
#include <qtimer.h>
#include <qpainter.h>
#include <qcursor.h>

#include <assert.h>

using namespace khtml;
using namespace DOM;

RenderFrameSet::RenderFrameSet( HTMLFrameSetElementImpl *frameSet)
    : RenderBox(frameSet)
{
  // init RenderObject attributes
    setInline(false);

  for (int k = 0; k < 2; ++k) {
      m_gridLen[k] = -1;
      m_gridDelta[k] = 0;
      m_gridLayout[k] = 0;
  }

  m_resizing = m_clientresizing= false;

  m_cursor = Qt::ArrowCursor;

  m_hSplit = -1;
  m_vSplit = -1;

  m_hSplitVar = 0;
  m_vSplitVar = 0;
}

RenderFrameSet::~RenderFrameSet()
{
    for (int k = 0; k < 2; ++k) {
        delete [] m_gridLayout[k];
        delete [] m_gridDelta[k];
    }
    delete [] m_hSplitVar;
    delete [] m_vSplitVar;
}

bool RenderFrameSet::nodeAtPoint(NodeInfo& info, int _x, int _y, int _tx, int _ty, HitTestAction hitTestAction,  bool inBox)
{
    RenderBox::nodeAtPoint(info, _x, _y, _tx, _ty, hitTestAction, inBox);

    bool inside = m_resizing || canResize(_x, _y);

    if ( inside && element() && !element()->noResize() && !info.readonly()) {
        info.setInnerNode(element());
        info.setInnerNonSharedNode(element());
    }

    return inside || m_clientresizing;
}

void RenderFrameSet::layout( )
{
    KHTMLAssert( needsLayout() );
    KHTMLAssert( minMaxKnown() );

    if ( !parent()->isFrameSet() ) {
        KHTMLView* view = canvas()->view();
        m_width = view ? view->visibleWidth() : 0;
        m_height = view ? view->visibleHeight() : 0;
    }

#ifdef DEBUG_LAYOUT
    kdDebug( 6040 ) << renderName() << "(FrameSet)::layout( ) width=" << width() << ", height=" << height() << endl;
#endif

    int remainingLen[2];
    remainingLen[1] = m_width - (element()->totalCols()-1)*element()->border();
    if(remainingLen[1]<0) remainingLen[1]=0;
    remainingLen[0] = m_height - (element()->totalRows()-1)*element()->border();
    if(remainingLen[0]<0) remainingLen[0]=0;

    int availableLen[2];
    availableLen[0] = remainingLen[0];
    availableLen[1] = remainingLen[1];

    if (m_gridLen[0] != element()->totalRows() || m_gridLen[1] != element()->totalCols()) {
        // number of rows or cols changed
        // need to zero out the deltas
        m_gridLen[0] = element()->totalRows();
        m_gridLen[1] = element()->totalCols();
        for (int k = 0; k < 2; ++k) {
            delete [] m_gridDelta[k];
            m_gridDelta[k] = new int[m_gridLen[k]];
            delete [] m_gridLayout[k];
            m_gridLayout[k] = new int[m_gridLen[k]];
            for (int i = 0; i < m_gridLen[k]; ++i)
                m_gridDelta[k][i] = 0;
        }
    }

    for (int k = 0; k < 2; ++k) {
        int totalRelative = 0;
        int totalFixed = 0;
        int totalPercent = 0;
        int countRelative = 0;
        int countPercent = 0;
        int gridLen = m_gridLen[k];
        int* gridDelta = m_gridDelta[k];
        khtml::Length* grid =  k ? element()->m_cols : element()->m_rows;
        int* gridLayout = m_gridLayout[k];

        if (grid) {
            // first distribute the available width for fixed rows, then handle the
            // percentage ones and distribute remaining over relative
            for(int i = 0; i< gridLen; ++i)
                if (grid[i].isFixed()) {
                    gridLayout[i] = kMin(grid[i].value() > 0 ? grid[i].value() : 0, remainingLen[k]);
                    remainingLen[k] -= gridLayout[i];
                    totalFixed += gridLayout[i];
                }
                else if(grid[i].isRelative()) {
                    totalRelative += grid[i].value() > 1 ? grid[i].value() : 1;
                    countRelative++;
                }

            for(int i = 0; i < gridLen; i++)
                if(grid[i].isPercent()) {
                    gridLayout[i] = kMin(kMax(grid[i].width(availableLen[k]), 0), remainingLen[k]);
                    remainingLen[k] -= gridLayout[i];
                    totalPercent += grid[i].value();
                    countPercent++;
                }

            assert(remainingLen[k] >= 0);

            if (countRelative) {
                int remaining = remainingLen[k];
                for (int i = 0; i < gridLen; ++i)
                    if (grid[i].isRelative()) {
                        gridLayout[i] = ((grid[i].value() > 1 ? grid[i].value() : 1) * remaining) / totalRelative;
                        remainingLen[k] -= gridLayout[i];
                    }
            }

            // distribute the rest
            if (remainingLen[k]) {
                LengthType distributeType = countPercent ? Percent : Fixed;
                int total = countPercent ? totalPercent : totalFixed;
                if (!total) total = 1;
                for (int i = 0; i < gridLen; ++i)
                    if (grid[i].type() == distributeType) {
                        int toAdd = (remainingLen[k] * grid[i].value()) / total;
                        gridLayout[i] += toAdd;
                    }
            }

            // now we have the final layout, distribute the delta over it
            bool worked = true;
            for (int i = 0; i < gridLen; ++i) {
                if (gridLayout[i] && gridLayout[i] + gridDelta[i] <= 0)
                    worked = false;
                gridLayout[i] += gridDelta[i];
            }
            // now the delta's broke something, undo it and reset deltas
            if (!worked)
                for (int i = 0; i < gridLen; ++i) {
                    gridLayout[i] -= gridDelta[i];
                    gridDelta[i] = 0;
                }
        }
        else
            gridLayout[0] = remainingLen[k];
    }

    positionFrames();

    RenderObject *child = firstChild();
    if ( !child )
      return;

    if(!m_hSplitVar && !m_vSplitVar)
    {
#ifdef DEBUG_LAYOUT
        kdDebug( 6031 ) << "calculationg fixed Splitters" << endl;
#endif
        if(!m_vSplitVar && element()->totalCols() > 1)
        {
            m_vSplitVar = new bool[element()->totalCols()];
            for(int i = 0; i < element()->totalCols(); i++) m_vSplitVar[i] = true;
        }
        if(!m_hSplitVar && element()->totalRows() > 1)
        {
            m_hSplitVar = new bool[element()->totalRows()];
            for(int i = 0; i < element()->totalRows(); i++) m_hSplitVar[i] = true;
        }

        for(int r = 0; r < element()->totalRows(); r++)
        {
            for(int c = 0; c < element()->totalCols(); c++)
            {
                bool fixed = false;

                if ( child->isFrameSet() )
                  fixed = static_cast<RenderFrameSet *>(child)->element()->noResize();
                else
                  fixed = static_cast<RenderFrame *>(child)->element()->noResize();

                if(fixed)
                {
#ifdef DEBUG_LAYOUT
                    kdDebug( 6031 ) << "found fixed cell " << r << "/" << c << "!" << endl;
#endif
                    if( element()->totalCols() > 1)
                    {
                        if(c>0) m_vSplitVar[c-1] = false;
                        m_vSplitVar[c] = false;
                    }
                    if( element()->totalRows() > 1)
                    {
                        if(r>0) m_hSplitVar[r-1] = false;
                        m_hSplitVar[r] = false;
                    }
                    child = child->nextSibling();
                    if(!child) goto end2;
                }
#ifdef DEBUG_LAYOUT
                else
                    kdDebug( 6031 ) << "not fixed: " << r << "/" << c << "!" << endl;
#endif
            }
        }

    }
    RenderContainer::layout();
 end2:
    setNeedsLayout(false);
}

void RenderFrameSet::positionFrames()
{
  int r;
  int c;

  RenderObject *child = firstChild();
  if ( !child )
    return;

  //  NodeImpl *child = _first;
  //  if(!child) return;

  int yPos = 0;

  for(r = 0; r < element()->totalRows(); r++)
  {
    int xPos = 0;
    for(c = 0; c < element()->totalCols(); c++)
    {
      child->setPos( xPos, yPos );