khtmlview.cpp.orig

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) 1998, 1999 Torben Weis <[e-mail]>
 *                     1999 Lars Knoll <[e-mail]>
 *                     1999 Antti Koivisto <[e-mail]>
 *                     2000-2004 Dirk Mueller <[e-mail]>
 *                     2003 Leo Savernik <[e-mail]>
 *                     2003-2004 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 "khtmlview.moc"

#include "khtmlview.h"

#include "khtml_part.h"
#include "khtml_events.h"

#include "html/html_documentimpl.h"
#include "html/html_inlineimpl.h"
#include "html/html_formimpl.h"
#include "rendering/render_arena.h"
#include "rendering/render_canvas.h"
#include "rendering/render_frames.h"
#include "rendering/render_replaced.h"
#include "rendering/render_layer.h"
#include "rendering/render_line.h"
#include "rendering/render_table.h"
// removeme
#define protected public
#include "rendering/render_text.h"
#undef protected
#include "xml/dom2_eventsimpl.h"
#include "css/cssstyleselector.h"
#include "css/csshelper.h"
#include "misc/htmlhashes.h"
#include "misc/helper.h"
#include "khtml_settings.h"
#include "khtml_printsettings.h"

#include "khtmlpart_p.h"

#ifndef KHTML_NO_CARET
#include "khtml_caret_p.h"
#include "xml/dom2_rangeimpl.h"
#endif

#include <kapplication.h>
#include <kcursor.h>
#include <kdebug.h>
#include <kdialogbase.h>
#include <kiconloader.h>
#include <kimageio.h>
#include <klocale.h>
#include <knotifyclient.h>
#include <kprinter.h>
#include <ksimpleconfig.h>
#include <kstandarddirs.h>
#include <kstdaccel.h>
#include <kstringhandler.h>
#include <kurldrag.h>

#include <qbitmap.h>
#include <qlabel.h>
#include <qobjectlist.h>
#include <qpaintdevicemetrics.h>
#include <qpainter.h>
#include <qptrdict.h>
#include <qtooltip.h>
#include <qstring.h>
#include <qstylesheet.h>
#include <qtimer.h>
#include <qvaluevector.h>

//#define DEBUG_NO_PAINT_BUFFER

//#define DEBUG_FLICKER

//#define DEBUG_PIXEL

#ifdef Q_WS_X11
#include <X11/Xlib.h>
#include <fixx11h.h>
#endif

#define PAINT_BUFFER_HEIGHT 128

#if 0
namespace khtml {
    void dumpLineBoxes(RenderFlow *flow);
}
#endif

using namespace DOM;
using namespace khtml;
class KHTMLToolTip;


#ifndef QT_NO_TOOLTIP

class KHTMLToolTip : public QToolTip
{
public:
    KHTMLToolTip(KHTMLView *view,  KHTMLViewPrivate* vp) : QToolTip(view->viewport())
    {
        m_view = view;
        m_viewprivate = vp;
    };

protected:
    virtual void maybeTip(const QPoint &);

private:
    KHTMLView *m_view;
    KHTMLViewPrivate* m_viewprivate;
};

#endif

class KHTMLViewPrivate {
    friend class KHTMLToolTip;
public:

    enum PseudoFocusNodes {
	PFNone,
	PFTop,
	PFBottom
    };

    enum CompletedState {
        CSNone = 0,
        CSFull,
        CSActionPending
    };

    KHTMLViewPrivate()
        : underMouse( 0 ), underMouseNonShared( 0 )
    {
#ifndef KHTML_NO_CARET
	m_caretViewContext = 0;
	m_editorContext = 0;
#endif // KHTML_NO_CARET
        postponed_autorepeat = NULL;
        reset();
        vmode = QScrollView::Auto;
 	hmode = QScrollView::Auto;
        tp=0;
        paintBuffer=0;
        vertPaintBuffer=0;
        formCompletions=0;
        prevScrollbarVisible = true;
	tooltip = 0;
        possibleTripleClick = false;
        emitCompletedAfterRepaint = CSNone;
	cursor_icon_widget = NULL;
        m_mouseScrollTimer = 0;
        m_mouseScrollIndicator = 0;
    }
    ~KHTMLViewPrivate()
    {
        delete formCompletions;
        delete tp; tp = 0;
        delete paintBuffer; paintBuffer =0;
        delete vertPaintBuffer;
        delete postponed_autorepeat;
        if (underMouse)
	    underMouse->deref();
        if (underMouseNonShared)
	    underMouseNonShared->deref();
	delete tooltip;
#ifndef KHTML_NO_CARET
	delete m_caretViewContext;
	delete m_editorContext;
#endif // KHTML_NO_CARET
        delete cursor_icon_widget;
        delete m_mouseScrollTimer;
        delete m_mouseScrollIndicator;
    }
    void reset()
    {
        if (underMouse)
	    underMouse->deref();
	underMouse = 0;
        if (underMouseNonShared)
	    underMouseNonShared->deref();
	underMouseNonShared = 0;
        linkPressed = false;
        useSlowRepaints = false;
	tabMovePending = false;
	lastTabbingDirection = true;
	pseudoFocusNode = PFNone;
#ifndef KHTML_NO_SCROLLBARS
        //We don't turn off the toolbars here
	//since if the user turns them
	//off, then chances are they want them turned
	//off always - even after a reset.
#else
        vmode = QScrollView::AlwaysOff;
        hmode = QScrollView::AlwaysOff;
#endif
#ifdef DEBUG_PIXEL
        timer.start();
        pixelbooth = 0;
        repaintbooth = 0;
#endif
        scrollBarMoved = false;
        contentsMoving = false;
        ignoreWheelEvents = false;
	borderX = 30;
	borderY = 30;
        paged = false;
	clickX = -1;
	clickY = -1;
        prevMouseX = -1;
        prevMouseY = -1;
	clickCount = 0;
	isDoubleClick = false;
	scrollingSelf = false;
        delete postponed_autorepeat;
        postponed_autorepeat = NULL;
	layoutTimerId = 0;
        repaintTimerId = 0;
        scrollTimerId = 0;
        scrollSuspended = false;
        scrollSuspendPreActivate = false;
        complete = false;
        firstRelayout = true;
        needsFullRepaint = true;
        dirtyLayout = false;
        layoutSchedulingEnabled = true;
        painting = false;
        updateRegion = QRegion();
        m_dialogsAllowed = true;
#ifndef KHTML_NO_CARET
        if (m_caretViewContext) {
          m_caretViewContext->caretMoved = false;
	  m_caretViewContext->keyReleasePending = false;
        }/*end if*/
#endif // KHTML_NO_CARET
#ifndef KHTML_NO_TYPE_AHEAD_FIND
        typeAheadActivated = false;
#endif // KHTML_NO_TYPE_AHEAD_FIND
	accessKeysActivated = false;
	accessKeysPreActivate = false;

        // We ref/deref to ensure defaultHTMLSettings is available
        KHTMLFactory::ref();
        accessKeysEnabled = KHTMLFactory::defaultHTMLSettings()->accessKeysEnabled();
        KHTMLFactory::deref();

        emitCompletedAfterRepaint = CSNone;
    }
    void newScrollTimer(QWidget *view, int tid)
    {
        //kdDebug(6000) << "newScrollTimer timer " << tid << endl;
        view->killTimer(scrollTimerId);
        scrollTimerId = tid;
        scrollSuspended = false;
    }
    enum ScrollDirection { ScrollLeft, ScrollRight, ScrollUp, ScrollDown };

    void adjustScroller(QWidget *view, ScrollDirection direction, ScrollDirection oppositedir)
    {
        static const struct { int msec, pixels; } timings [] = {
            {320,1}, {224,1}, {160,1}, {112,1}, {80,1}, {56,1}, {40,1},
            {28,1}, {20,1}, {20,2}, {20,3}, {20,4}, {20,6}, {20,8}, {0,0}
        };
        if (!scrollTimerId ||
            (scrollDirection != direction &&
             (scrollDirection != oppositedir || scrollSuspended))) {
            scrollTiming = 6;
            scrollBy = timings[scrollTiming].pixels;
            scrollDirection = direction;
            newScrollTimer(view, view->startTimer(timings[scrollTiming].msec));
        } else if (scrollDirection == direction &&
                   timings[scrollTiming+1].msec && !scrollSuspended) {
            scrollBy = timings[++scrollTiming].pixels;
            newScrollTimer(view, view->startTimer(timings[scrollTiming].msec));
        } else if (scrollDirection == oppositedir) {
            if (scrollTiming) {
                scrollBy = timings[--scrollTiming].pixels;
                newScrollTimer(view, view->startTimer(timings[scrollTiming].msec));
            }
        }
        scrollSuspended = false;
    }

#ifndef KHTML_NO_CARET
    /** this function returns an instance of the caret view context. If none
     * exists, it will be instantiated.
     */
    CaretViewContext *caretViewContext() {
      if (!m_caretViewContext) m_caretViewContext = new CaretViewContext();
      return m_caretViewContext;
    }
    /** this function returns an instance of the editor context. If none
     * exists, it will be instantiated.
     */
    EditorContext *editorContext() {
      if (!m_editorContext) m_editorContext = new EditorContext();
      return m_editorContext;
    }
#endif // KHTML_NO_CARET

#ifdef DEBUG_PIXEL
    QTime timer;
    unsigned int pixelbooth;
    unsigned int repaintbooth;
#endif

    QPainter *tp;
    QPixmap  *paintBuffer;
    QPixmap  *vertPaintBuffer;
    NodeImpl *underMouse;
    NodeImpl *underMouseNonShared;

    bool tabMovePending:1;
    bool lastTabbingDirection:1;
    PseudoFocusNodes pseudoFocusNode:2;
    bool scrollBarMoved:1;
    bool contentsMoving:1;

    QScrollView::ScrollBarMode vmode;
    QScrollView::ScrollBarMode hmode;
    bool prevScrollbarVisible:1;
    bool linkPressed:1;
    bool useSlowRepaints:1;
    bool ignoreWheelEvents:1;

    int borderX, borderY;
    KSimpleConfig *formCompletions;

    bool paged;

    int clickX, clickY, clickCount;
    bool isDoubleClick;

    int prevMouseX, prevMouseY;
    bool scrollingSelf;
    int layoutTimerId;
    QKeyEvent* postponed_autorepeat;

    int repaintTimerId;
    int scrollTimerId;
    int scrollTiming;
    int scrollBy;
    ScrollDirection scrollDirection		:2;
    bool scrollSuspended			:1;
    bool scrollSuspendPreActivate		:1;
    bool complete				:1;
    bool firstRelayout				:1;
    bool layoutSchedulingEnabled		:1;
    bool needsFullRepaint			:1;
    bool painting				:1;
    bool possibleTripleClick			:1;
    bool dirtyLayout				:1;
    bool m_dialogsAllowed			:1;
    QRegion updateRegion;
    KHTMLToolTip *tooltip;
    QPtrDict<QWidget> visibleWidgets;
#ifndef KHTML_NO_CARET
    CaretViewContext *m_caretViewContext;
    EditorContext *m_editorContext;
#endif // KHTML_NO_CARET
#ifndef KHTML_NO_TYPE_AHEAD_FIND
    QString findString;
    QTimer timer;
    bool findLinksOnly;
    bool typeAheadActivated;
#endif // KHTML_NO_TYPE_AHEAD_FIND
    bool accessKeysEnabled;
    bool accessKeysActivated;
    bool accessKeysPreActivate;
    CompletedState emitCompletedAfterRepaint;

    QWidget* cursor_icon_widget;

    // scrolling activated by MMB
    int m_mouseScroll_byX : 4;
    int m_mouseScroll_byY : 4;
    QTimer *m_mouseScrollTimer;
    QWidget *m_mouseScrollIndicator;
};

#ifndef QT_NO_TOOLTIP

/** calculates the client-side image map rectangle for the given image element
 * @param img image element
 * @param scrollOfs scroll offset of viewport in content coordinates
 * @param p position to be probed in viewport coordinates
 * @param r returns the bounding rectangle in content coordinates
 * @param s returns the title string
 * @return true if an appropriate area was found -- only in this case r and
 *	s are valid, false otherwise
 */
static bool findImageMapRect(HTMLImageElementImpl *img, const QPoint &scrollOfs,