dom_nodeimpl.h

将konqueror浏览器移植到ARM9 2410中

/**
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 1999 Antti Koivisto ([e-mail])
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * $Id: dom_nodeimpl.h,v 1.88.2.1 2001/11/02 14:19:04 mueller Exp $
 */
#ifndef _DOM_NodeImpl_h_
#define _DOM_NodeImpl_h_

#include "dom/dom_misc.h"
#include "dom/dom_string.h"
#include "dom/dom_node.h"

#include <qlist.h>

class QPainter;
class KHTMLView;
class QRect;
class QMouseEvent;

namespace khtml {
    class RenderStyle;
    class RenderObject;

    //enumerator for findSelectionNode
    enum FindSelectionResult { SelectionPointBefore,
                               SelectionPointAfter,
                               SelectionPointInside };
};

namespace DOM {

class NodeListImpl;
class NamedNodeMapImpl;
class DocumentImpl;
class CSSStyleDeclarationImpl;
class RegisteredEventListener;
class EventImpl;

    class DocumentPtr : public DomShared
    {
    public:
        DocumentImpl *document() const { return doc; }
    private:
        DocumentPtr() { doc = 0; }
        void resetDocument() { doc = 0; }
        friend class DocumentImpl;

        DocumentImpl *doc;
    };

// Skeleton of a node. No children and no parents are allowed.
// We use this class as a basic Node Implementation, and derive all other
// Node classes from it. This is done to reduce memory overhead.
// Derived classes will only implement the functionality needed, and only
// use as much storage as they really need; i.e. if a node has no children
// or even no parent; it does not need to store null pointers.
// (Such nodes could be attributes or readonly nodes at the end of the
// tree)
class NodeImpl : public DomShared
{
public:
    NodeImpl(DocumentPtr *doc);
    virtual ~NodeImpl();

    virtual const DOMString nodeName() const;

    virtual DOMString nodeValue() const;

    virtual void setNodeValue( const DOMString &, int& exceptioncode );

    virtual unsigned short nodeType() const;

    virtual bool isElementNode() const { return false; }
    virtual bool isAttributeNode() const { return false; }
    virtual bool isTextNode() const { return false; }
    virtual bool isDocumentNode() const { return false; }
    virtual bool isXMLElementNode() const { return false; }

    virtual NodeImpl *parentNode() const;

    virtual NodeListImpl *childNodes();

    virtual NodeImpl *firstChild() const;

    virtual NodeImpl *lastChild() const;

    virtual NodeImpl *previousSibling() const;

    virtual NodeImpl *nextSibling() const;

    virtual NamedNodeMapImpl *attributes();

    DocumentImpl *ownerDocument() const
        { return document->document(); }

    virtual NodeImpl *insertBefore ( NodeImpl *newChild, NodeImpl *refChild, int &exceptioncode );

    virtual NodeImpl *replaceChild ( NodeImpl *newChild, NodeImpl *oldChild, int &exceptioncode );

    virtual NodeImpl *removeChild ( NodeImpl *oldChild, int &exceptioncode );

    virtual NodeImpl *appendChild ( NodeImpl *newChild, int &exceptioncode );

    virtual bool hasChildNodes (  ) const;

    virtual NodeImpl *cloneNode ( bool deep, int &exceptioncode ) = 0;

    // helper functions not being part of the DOM
    // Attention: all these functions assume the caller did
    //            the consistency checking!!!!
    virtual void setParent(NodeImpl *parent);

    virtual void setPreviousSibling(NodeImpl *);
    virtual void setNextSibling(NodeImpl *);

    virtual void setFirstChild(NodeImpl *child);
    virtual void setLastChild(NodeImpl *child);

    // used by the parser. Doesn't do as many error checkings as
    // appendChild(), and returns the node into which will be parsed next.
    virtual NodeImpl *addChild(NodeImpl *newChild);

    virtual unsigned short id() const { return 0; };

    enum MouseEventType {
        MousePress,
        MouseRelease,
        MouseClick,
        MouseDblClick,
        MouseMove
    };

    struct MouseEvent
    {
        MouseEvent( int _button, MouseEventType _type,
                    const DOMString &_url = DOMString(), NodeImpl *_innerNode = 0, bool _noHref = false )
            {
                button = _button; type = _type;
                url = _url;
                innerNode = _innerNode; 
                currentZIndex = -1;
                zIndex = -1;
                noHref = _noHref;
            }

        int button;
        MouseEventType type;
        DOMString url; // url under mouse or empty
        Node innerNode;
        int zIndex; // used to select the one most on top
        int currentZIndex; // temporary variable to avoid passing a param around
        bool noHref; // whether anchor should be blocked by a map element
        int nodeAbsX, nodeAbsY; // temporary hack for selection stuff
    };

    /*
     * Called whenever we are getting ready to handle a mouse event.
     * Does not actually perform any actions e.g. rollovers - this
     * is handled in eventDefault()
     *
     * This fills in ev with appropriate info such as innerNode, url etc.
     *
     * Returns true if the mouse is within this node (or it's children),
     * false otherwise
     */
    virtual bool prepareMouseEvent( int /*_x*/, int /*_y*/,
                                    int /*_tx*/, int /*_ty*/,
                                    MouseEvent */*ev*/ ) { return false; }

    virtual khtml::FindSelectionResult findSelectionNode( int /*_x*/, int /*_y*/, int /*_tx*/, int /*_ty*/,
                                                   DOM::Node & /*node*/, int & /*offset*/ )
                                                   { return khtml::SelectionPointBefore; }

    virtual void setStyle(khtml::RenderStyle *) {}
    virtual khtml::RenderStyle *style() const { return 0; }

    virtual void setRenderer(khtml::RenderObject *object) { m_render = object; }
    virtual khtml::RenderObject *renderer() const { return m_render; }

    virtual DOM::CSSStyleDeclarationImpl *styleRules() { return 0; }

    // for LINK and STYLE
    virtual void sheetLoaded() {}

    bool hasEvents() const  { return m_hasEvents; }
    bool hasID() const      { return m_hasId; }
    bool hasClass() const   { return m_hasClass; }
    bool hasStyle() const   { return m_hasStyle; }
    bool pressed() const    { return m_pressed; }
    bool active() const     { return m_active; }
    bool mouseInside() const { return m_mouseInside; }
    bool attached() const   { return m_attached; }
    bool changed() const    { return m_changed; }
    bool complexText() const { return m_complexText; }
    void setComplexText(bool b=true) { m_complexText = b; }
    void setHasEvents(bool b=true) { m_hasEvents = b; }
    void setHasID(bool b=true) { m_hasId = b; }
    void setHasClass(bool b=true) { m_hasClass = b; }
    void setHasStyle(bool b=true) { m_hasStyle = b; }
    void setPressed(bool b=true) { m_pressed = b; }
    void setMouseInside(bool b=true) { m_mouseInside = b; }
    void setAttached(bool b=true) { m_attached = b; }
    virtual void setFocus(bool b=true) { m_focused = b; }
    virtual void setActive(bool b=true) { m_active = b; }
    virtual void setChanged(bool b=true);

    /**
     * whether this node can receive the keyboard focus.
     */
    virtual bool isSelectable() const { return false; };

    /**
     * attach to a KHTMLView. Additional info (like style information,
     * frames, etc...) will only get loaded, when attached to a widget.
     */
    virtual void attach() { setAttached(true); }  
    /**
     * detach from a HTMLWidget
     */
    virtual void detach() { setAttached(false); }

    // ### check if this function is still needed at all...
    virtual bool isInline() const { return true; }
    virtual void printTree(int indent=0);
    virtual QString toHTML() const;
    QString recursive_toHTML(bool start = false) const;

    virtual void applyChanges(bool top = true, bool force = true);
    virtual void getCursor(int offset, int &_x, int &_y, int &height);
    virtual QRect getRect() const;

    virtual void recalcStyle() {}

    virtual DOMString namespaceURI() const;

    virtual unsigned long nodeIndex() const;

    virtual DocumentImpl *getDocument()
        { return document->document(); } // different from ownerDocument() in that it is never null

    void addEventListener(int id, EventListener *listener, const bool useCapture);
    void addEventListener(const DOMString &type, EventListener *listener,
                                  const bool useCapture, int &exceptioncode);
    void removeEventListener(int id, EventListener *listener, bool useCapture);
    void removeEventListener(const DOMString &type, EventListener *listener,
                                     bool useCapture,int &exceptioncode);
    void removeHTMLEventListener(int id);
    void setHTMLEventListener(int id, EventListener *listener);
    EventListener *getHTMLEventListener(int id);

    bool dispatchEvent(EventImpl *evt, int &exceptioncode);
    bool dispatchGenericEvent( EventImpl *evt, int &exceptioncode);
    bool dispatchHTMLEvent(int _id, bool canBubbleArg, bool cancelableArg);
    bool dispatchWindowEvent(int _id, bool canBubbleArg, bool cancelableArg);
    bool dispatchMouseEvent(QMouseEvent *e, int overrideId = 0, int overrideDetail = 0);
    bool dispatchUIEvent(int _id, int detail = 0);