html_formimpl.cpp

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

void HTMLInputElementImpl::reset()
{
    setValue(getAttribute(ATTR_VALUE));
    setChecked(getAttribute(ATTR_CHECKED) != 0);
}

void HTMLInputElementImpl::setChecked(bool _checked)
{
    if (m_form && m_type == RADIO && _checked && !name().isEmpty())
        m_form->radioClicked(this);

    if (m_checked == _checked) return;
    m_checked = _checked;
    setChanged();
}


DOMString HTMLInputElementImpl::value() const
{
    if (m_type == CHECKBOX || m_type == RADIO) {
        const DOMString val = getAttribute(ATTR_VALUE);
        // If no attribute exists, then just use "on" or "" based off the checked() state
        // of the control.
        if (val.isNull()) {
            if (checked())
                return DOMString("on");
            else
                return DOMString("");
        }
        return val;
    }

    DOMString val = m_value;
    // It's important *not* to fall back to the value attribute for file inputs,
    // because that would allow a malicious web page to upload files by setting the
    // value attribute in markup.
    if (val.isNull() && m_type != FILE)
        val = getAttribute(ATTR_VALUE);

    return val.isNull() ? DOMString("") : val;
}


void HTMLInputElementImpl::setValue(DOMString val)
{
    if (m_type == FILE) return;

    m_value = (val.isNull() ? DOMString("") : val);
    setChanged();
}

void HTMLInputElementImpl::blur()
{
    if(getDocument()->focusNode() == this)
	getDocument()->setFocusNode(0);
}

void HTMLInputElementImpl::focus()
{
    getDocument()->setFocusNode(this);
}

void HTMLInputElementImpl::defaultEventHandler(EventImpl *evt)
{
    if ( !m_disabled )
    {

        if (evt->isMouseEvent()) {
	    MouseEventImpl* const me = static_cast<MouseEventImpl*>(evt);
            if ((m_type == RADIO || m_type == CHECKBOX)
		&& me->id() == EventImpl::MOUSEUP_EVENT && me->detail() > 0) {
		// click will follow
		setChecked(m_type == RADIO ? true : !checked());
	    }
            if (evt->id() == EventImpl::CLICK_EVENT && m_type == IMAGE && m_render) {
		// record the mouse position for when we get the DOMActivate event
		int offsetX, offsetY;
		m_render->absolutePosition(offsetX,offsetY);
		xPos = me->clientX()-offsetX;
		yPos = me->clientY()-offsetY;
                KHTMLView* v = getDocument()->view();
                if ( v ) {
                    xPos += v->contentsX();
                    yPos += v->contentsY();
                }
	    }
	}

        if (m_type == RADIO || m_type == CHECKBOX || m_type == SUBMIT || m_type == RESET || m_type == BUTTON ) {
	    bool check = false;
	    if (active() && ( evt->id() == EventImpl::KEYUP_EVENT ||
	                      evt->id() == EventImpl::KEYPRESS_EVENT ) ) {
		TextEventImpl* const te = static_cast<TextEventImpl *>(evt);
		if (te->keyVal() == ' ')
		    check = true;
		else if (te->keyVal() == '\r' && (m_type == BUTTON || m_type == RESET || m_type == SUBMIT))
		    check = true;
	    }
	    if (check) {
	        if (evt->id() == EventImpl::KEYUP_EVENT)
		    click();
	        // Tell the parent that we handle this key (keyup and keydown), even though only keyup activates (#70478)
	        evt->setDefaultHandled();
	    }
        }


        // DOMActivate events cause the input to be "activated" - in the case of image and submit inputs, this means
        // actually submitting the form. For reset inputs, the form is reset. These events are sent when the user clicks
        // on the element, or presses enter while it is the active element. Javascript code wishing to activate the element
        // must dispatch a DOMActivate event - a click event will not do the job.
        if (m_type == IMAGE || m_type == SUBMIT || m_type == RESET) {
	    bool act = (evt->id() == EventImpl::DOMACTIVATE_EVENT);
	    if (!act && evt->id() == EventImpl::KEYUP_EVENT) {
		QKeyEvent* const ke = static_cast<TextEventImpl *>(evt)->qKeyEvent();
		if (ke && active() && (ke->key() == Qt::Key_Return || ke->key() == Qt::Key_Enter || ke->key() == Qt::Key_Space))
		    act = true;
	    }
	    if (act)
		activate();
	}
    }
    HTMLGenericFormElementImpl::defaultEventHandler(evt);
}

void HTMLInputElementImpl::activate()
{
    if (!m_form)
        return;

    m_clicked = true;
    if (m_type == RESET) {
        m_form->reset();
    }
    else {
        m_activeSubmit = true;
        if (!m_form->prepareSubmit()) {
            xPos = 0;
            yPos = 0;
        }
        m_activeSubmit = false;
    }
}

bool HTMLInputElementImpl::isEditable()
{
    return ((m_type == TEXT) || (m_type == PASSWORD) || (m_type == ISINDEX) || (m_type == FILE));
}

// -------------------------------------------------------------------------

HTMLLabelElementImpl::HTMLLabelElementImpl(DocumentPtr *doc)
    : HTMLGenericFormElementImpl(doc)
{
}

HTMLLabelElementImpl::~HTMLLabelElementImpl()
{
}

NodeImpl::Id HTMLLabelElementImpl::id() const
{
    return ID_LABEL;
}

void HTMLLabelElementImpl::attach()
{
    // skip the generic handler
    HTMLElementImpl::attach();
}

NodeImpl* HTMLLabelElementImpl::getFormElement()
{
	    const DOMString formElementId = getAttribute(ATTR_FOR);
	    NodeImpl *newNode=0L;
    	    if (!formElementId.isEmpty())
	        newNode=getDocument()->getElementById(formElementId);
    	    if (!newNode){
    		const uint children=childNodeCount();
    		if (children>1)
    		    for (unsigned int i=0;i<children;++i){
			const uint nodeId=childNode(i)->id();
			if (nodeId==ID_INPUT || nodeId==ID_SELECT || nodeId==ID_TEXTAREA){
			    newNode=childNode(i);
			    break;
			}
		    }
		}
return newNode;
}

void HTMLLabelElementImpl::defaultEventHandler(EventImpl *evt)
{
    if ( !m_disabled ) {
	bool act = false;
	if ( evt->id() == EventImpl::CLICK_EVENT ) {
	    act = true;
	}
	else if ( evt->id() == EventImpl::KEYUP_EVENT ||
	                      evt->id() == EventImpl::KEYPRESS_EVENT ) {
	    QKeyEvent* const ke = static_cast<TextEventImpl *>(evt)->qKeyEvent();
	    if (ke && active() && (ke->key() == Qt::Key_Return || ke->key() == Qt::Key_Enter || ke->key() == Qt::Key_Space))
		act = true;
	}

	if (act) {
	    NodeImpl* const formNode=getFormElement();
	    if (formNode) {
		getDocument()->setFocusNode(formNode);
		if (formNode->id()==ID_INPUT)
		    static_cast<DOM::HTMLInputElementImpl*>(formNode)->click();
	    }
	    evt->setDefaultHandled();
	}
    }
    HTMLGenericFormElementImpl::defaultEventHandler(evt);
}

// -------------------------------------------------------------------------

HTMLLegendElementImpl::HTMLLegendElementImpl(DocumentPtr *doc, HTMLFormElementImpl *f)
    : HTMLGenericFormElementImpl(doc, f)
{
}

HTMLLegendElementImpl::~HTMLLegendElementImpl()
{
}

NodeImpl::Id HTMLLegendElementImpl::id() const
{
    return ID_LEGEND;
}

void HTMLLegendElementImpl::attach()
{
    assert(!attached());
    assert(!m_render);
    assert(parentNode());
    RenderStyle* const _style = getDocument()->styleSelector()->styleForElement(this);
    _style->ref();
    if (parentNode()->renderer() && _style->display() != NONE) {
        m_render = new (getDocument()->renderArena()) RenderLegend(this);
        m_render->setStyle(_style);
    }
    HTMLGenericFormElementImpl::attach();
    _style->deref();
}

void HTMLLegendElementImpl::parseAttribute(AttributeImpl *attr)
{
    switch(attr->id())
    {
    case ATTR_ACCESSKEY:
        break;
    default:
        HTMLElementImpl::parseAttribute(attr);
    }
}

// -------------------------------------------------------------------------

HTMLSelectElementImpl::HTMLSelectElementImpl(DocumentPtr *doc, HTMLFormElementImpl *f)
    : HTMLGenericFormElementImpl(doc, f)
{
    m_multiple = false;
    m_recalcListItems = false;
    // 0 means invalid (i.e. not set)
    m_size = 0;
    m_minwidth = 0;
    m_length   = 0;
}

HTMLSelectElementImpl::~HTMLSelectElementImpl()
{
    if (getDocument()) getDocument()->deregisterMaintainsState(this);
}

NodeImpl::Id HTMLSelectElementImpl::id() const
{
    return ID_SELECT;
}

DOMString HTMLSelectElementImpl::type() const
{
    return (m_multiple ? "select-multiple" : "select-one");
}

long HTMLSelectElementImpl::selectedIndex() const
{
    // return the number of the first option selected
    uint o = 0;
    QMemArray<HTMLGenericFormElementImpl*> items = listItems();
    const unsigned int itemsSize = items.size();
    for (unsigned int i = 0; i < itemsSize; ++i) {
        if (items[i]->id() == ID_OPTION) {
            if (static_cast<HTMLOptionElementImpl*>(items[i])->selected())
                return o;
            o++;
        }
    }
    Q_ASSERT(m_multiple || items.isEmpty());
    return -1;
}

void HTMLSelectElementImpl::setSelectedIndex( long  index )
{
    // deselect all other options and select only the new one
    QMemArray<HTMLGenericFormElementImpl*> items = listItems();
    int listIndex;
    const int itemsSize = int(items.size());
    for (listIndex = 0; listIndex < itemsSize; ++listIndex) {
        if (items[listIndex]->id() == ID_OPTION)
            static_cast<HTMLOptionElementImpl*>(items[listIndex])->setSelected(false);
    }
    listIndex = optionToListIndex(index);
    if (listIndex >= 0)
        static_cast<HTMLOptionElementImpl*>(items[listIndex])->setSelected(true);

    setChanged(true);
}

long HTMLSelectElementImpl::length() const
{
    if (m_recalcListItems)
        recalcListItems();
    return m_length;
}

void HTMLSelectElementImpl::add( const HTMLElement &element, const HTMLElement &before, int& exceptioncode )
{
    if(element.isNull() || element.handle()->id() != ID_OPTION)
        return;

    HTMLOptionElementImpl* option = static_cast<HTMLOptionElementImpl*>(element.handle());;
    //Fast path for appending an item. Can't be done if it is selected and 
    //we're single-select, since we may need to drop an implicitly-selected item
    bool fastAppendLast = false;
    if (before.handle() == 0 && (m_multiple || !option->selected()) && !m_recalcListItems)
        fastAppendLast = true;

    insertBefore(option, before.handle(), exceptioncode );

    if (fastAppendLast) {
        m_listItems.resize(m_listItems.size() + 1);
        m_listItems[m_listItems.size() - 1] = option;
        ++m_length;
        m_recalcListItems = false;
    } else if (!exceptioncode)
        setRecalcListItems();
}

void HTMLSelectElementImpl::remove( long index )
{
    int exceptioncode = 0;
    const int listIndex = optionToListIndex(index);

    QMemArray<HTMLGenericFormElementImpl*> items = listItems();
    if(listIndex < 0 || index >= int(items.size()))
        return; // ### what should we do ? remove the last item?

    //Fast path for last element, for e.g. clearing the box
    //Note that if this is a single-select, we may have to recompute
    //anyway if the item was selected, since we may want to set 
    //a different one
    bool fastRemoveLast = false;
    if ((listIndex == items.size() - 1) && !m_recalcListItems && 
        (m_multiple || !static_cast<HTMLOptionElementImpl*>(items[listIndex])->selected()))
            fastRemoveLast = true;

    removeChild(items[listIndex], exceptioncode);

    if (fastRemoveLast) {
        m_listItems.resize(m_listItems.size() - 1);
        --m_length;
        m_recalcListItems = false;
    } else if( !exceptioncode)
        setRecalcListItems();
}

void HTMLSelectElementImpl::blur()
{
    if(getDocument()->focusNode() == this)
	getDocument()->setFocusNode(0);
}

void HTMLSelectElementImpl::focus()
{
    getDocument()->setFocusNode(this);
}

DOMString HTMLInputElementImpl::valueWithDefault() const
{
    DOMString v = value();
    if (v.isEmpty()) {
        switch (m_type) {
            case RESET:
#ifdef APPLE_CHANGES
                v = resetButtonDefaultLabel();
#else
                v = i18n("Reset");
#endif