C++ TextControlInnerTextElement::renderer方法代码示例

int RenderTextControl::textBlockLogicalWidth() const
{
    TextControlInnerTextElement* innerText = innerTextElement();
    ASSERT(innerText);

    LayoutUnit unitWidth = logicalWidth() - borderAndPaddingLogicalWidth();
    if (innerText->renderer())
        unitWidth -= innerText->renderBox()->paddingStart() + innerText->renderBox()->paddingEnd();

    return unitWidth;
}

void RenderTextControl::hitInnerTextElement(HitTestResult& result, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset)
{
    TextControlInnerTextElement* innerText = innerTextElement();
    if (!innerText->renderer())
        return;

    LayoutPoint adjustedLocation = accumulatedOffset + location();
    LayoutPoint localPoint = pointInContainer - toLayoutSize(adjustedLocation + innerText->renderBox()->location()) + scrolledContentOffset();
    result.setInnerNode(innerText);
    result.setInnerNonSharedNode(innerText);
    result.setLocalPoint(localPoint);
}

void RenderTextControl::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
    RenderBlockFlow::styleDidChange(diff, oldStyle);
    TextControlInnerTextElement* innerText = innerTextElement();
    if (!innerText)
        return;
    RenderTextControlInnerBlock* innerTextRenderer = innerText->renderer();
    if (innerTextRenderer) {
        // We may have set the width and the height in the old style in layout().
        // Reset them now to avoid getting a spurious layout hint.
        innerTextRenderer->style().setHeight(Length());
        innerTextRenderer->style().setWidth(Length());
        innerTextRenderer->setStyle(createInnerTextStyle(&style()));
    }
    textFormControlElement().updatePlaceholderVisibility();
}

String HTMLTextFormControlElement::valueWithHardLineBreaks() const
{
    // FIXME: It's not acceptable to ignore the HardWrap setting when there is no renderer.
    // While we have no evidence this has ever been a practical problem, it would be best to fix it some day.
    if (!isTextFormControl())
        return value();

    TextControlInnerTextElement* innerText = innerTextElement();
    if (!innerText)
        return value();

    RenderTextControlInnerBlock* renderer = innerText->renderer();
    if (!renderer)
        return value();

    Node* breakNode;
    unsigned breakOffset;
    RootInlineBox* line = renderer->firstRootBox();
    if (!line)
        return value();

    getNextSoftBreak(line, breakNode, breakOffset);

    StringBuilder result;
    for (Node* node = innerText->firstChild(); node; node = NodeTraversal::next(*node, innerText)) {
        if (is<HTMLBRElement>(*node))
            result.append(newlineCharacter);
        else if (is<Text>(*node)) {
            String data = downcast<Text>(*node).data();
            unsigned length = data.length();
            unsigned position = 0;
            while (breakNode == node && breakOffset <= length) {
                if (breakOffset > position) {
                    result.append(data, position, breakOffset - position);
                    position = breakOffset;
                    result.append(newlineCharacter);
                }
                getNextSoftBreak(line, breakNode, breakOffset);
            }
            result.append(data, position, length - position);
        }
        while (breakNode == node)
            getNextSoftBreak(line, breakNode, breakOffset);
    }
    stripTrailingNewline(result);
    return result.toString();
}

void RenderTextControl::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
{
    TextControlInnerTextElement* innerText = innerTextElement();
    ASSERT(innerText);
    if (RenderBox* innerTextBox = innerText->renderBox()) {
        LayoutUnit nonContentHeight = innerTextBox->verticalBorderAndPaddingExtent() + innerTextBox->verticalMarginExtent();
        logicalHeight = computeControlLogicalHeight(innerTextBox->lineHeight(true, HorizontalLine, PositionOfInteriorLineBoxes), nonContentHeight) + verticalBorderAndPaddingExtent();

        // We are able to have a horizontal scrollbar if the overflow style is scroll, or if its auto and there's no word wrap.
        if ((isHorizontalWritingMode() && (style().overflowX() == OSCROLL ||  (style().overflowX() == OAUTO && innerText->renderer()->style().overflowWrap() == NormalOverflowWrap)))
            || (!isHorizontalWritingMode() && (style().overflowY() == OSCROLL ||  (style().overflowY() == OAUTO && innerText->renderer()->style().overflowWrap() == NormalOverflowWrap))))
            logicalHeight += scrollbarThickness();
    }

    RenderBox::computeLogicalHeight(logicalHeight, logicalTop, computedValues);
}

void RenderTextControl::updateFromElement()
{
    TextControlInnerTextElement* innerText = innerTextElement();
    if (innerText && innerText->renderer())
        updateUserModifyProperty(textFormControlElement(), &innerText->renderer()->style());
}