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C++ NodeRenderingContext::previousRenderer方法代码示例

本文整理汇总了C++中NodeRenderingContext::previousRenderer方法的典型用法代码示例。如果您正苦于以下问题:C++ NodeRenderingContext::previousRenderer方法的具体用法?C++ NodeRenderingContext::previousRenderer怎么用?C++ NodeRenderingContext::previousRenderer使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在NodeRenderingContext的用法示例。


在下文中一共展示了NodeRenderingContext::previousRenderer方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: textRendererIsNeeded

bool Text::textRendererIsNeeded(const NodeRenderingContext& context)
{
    if (isEditingText())
        return true;

    if (!length())
        return false;

    if (context.style()->display() == NONE)
        return false;

    if (!containsOnlyWhitespace())
        return true;

    RenderObject* parent = context.parentRenderer();
    if (!parent->canHaveWhitespaceChildren())
        return false;

    if (context.style()->preserveNewline()) // pre/pre-wrap/pre-line always make renderers.
        return true;

    RenderObject* prev = context.previousRenderer();
    if (prev && prev->isBR()) // <span><br/> <br/></span>
        return false;

    if (parent->isRenderInline()) {
        // <span><div/> <div/></span>
        if (prev && !prev->isInline())
            return false;
    } else {
        if (parent->isRenderBlock() && !parent->childrenInline() && (!prev || !prev->isInline()))
            return false;

        // Avoiding creation of a Renderer for the text node is a non-essential memory optimization.
        // So to avoid blowing up on very wide DOMs, we limit the number of siblings to visit.
        unsigned maxSiblingsToVisit = 50;

        RenderObject* first = parent->firstChild();
        while (first && first->isFloatingOrOutOfFlowPositioned() && maxSiblingsToVisit--)
            first = first->nextSibling();
        if (!first || context.nextRenderer() == first)
            // Whitespace at the start of a block just goes away.  Don't even
            // make a render object for this text.
            return false;
    }
    return true;
}
开发者ID:Igalia,项目名称:blink,代码行数:47,代码来源:Text.cpp

示例2: textRendererIsNeeded

bool Text::textRendererIsNeeded(const NodeRenderingContext& context)
{
    if (isEditingText())
        return true;

    if (!length())
        return false;

    if (context.style()->display() == NONE)
        return false;

    bool onlyWS = containsOnlyWhitespace();
    if (!onlyWS)
        return true;

    RenderObject* parent = context.parentRenderer();
    if (parent->isTable() || parent->isTableRow() || parent->isTableSection() || parent->isRenderTableCol() || parent->isFrameSet())
        return false;
    
    if (context.style()->preserveNewline()) // pre/pre-wrap/pre-line always make renderers.
        return true;
    
    RenderObject* prev = context.previousRenderer();
    if (prev && prev->isBR()) // <span><br/> <br/></span>
        return false;
        
    if (parent->isRenderInline()) {
        // <span><div/> <div/></span>
        if (prev && !prev->isInline())
            return false;
    } else {
        if (parent->isRenderBlock() && !parent->childrenInline() && (!prev || !prev->isInline()))
            return false;
        
        RenderObject* first = parent->firstChild();
        while (first && first->isFloatingOrOutOfFlowPositioned())
            first = first->nextSibling();
        if (!first || context.nextRenderer() == first) {
            // Whitespace at the start of a block just goes away.  Don't even
            // make a render object for this text.
            return false;
        }
    }
    
    return true;
}
开发者ID:,项目名称:,代码行数:46,代码来源:


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