int RenderTextControl::textBlockLogicalHeight() const
{
    return logicalHeight() - borderAndPaddingLogicalHeight();
}
Ejemplo n.º 2
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int LayoutTextControl::textBlockLogicalHeight() const {
  return (logicalHeight() - borderAndPaddingLogicalHeight()).toInt();
}
Ejemplo n.º 3
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float RootInlineBox::placeEllipsis(const AtomicString& ellipsisStr,  bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox)
{
    if (!gEllipsisBoxMap)
        gEllipsisBoxMap = new EllipsisBoxMap();

    // Create an ellipsis box.
    auto newEllipsisBox = std::make_unique<EllipsisBox>(blockFlow(), ellipsisStr, this, ellipsisWidth - (markupBox ? markupBox->logicalWidth() : 0), logicalHeight(), y(), !prevRootBox(), isHorizontal(), markupBox);
    auto ellipsisBox = newEllipsisBox.get();

    gEllipsisBoxMap->add(this, std::move(newEllipsisBox));
    setHasEllipsisBox(true);

    // FIXME: Do we need an RTL version of this?
    if (ltr && (x() + logicalWidth() + ellipsisWidth) <= blockRightEdge) {
        ellipsisBox->setX(x() + logicalWidth());
        return logicalWidth() + ellipsisWidth;
    }

    // Now attempt to find the nearest glyph horizontally and place just to the right (or left in RTL)
    // of that glyph.  Mark all of the objects that intersect the ellipsis box as not painting (as being
    // truncated).
    bool foundBox = false;
    float truncatedWidth = 0;
    float position = placeEllipsisBox(ltr, blockLeftEdge, blockRightEdge, ellipsisWidth, truncatedWidth, foundBox);
    ellipsisBox->setX(position);
    return truncatedWidth;
}
Ejemplo n.º 4
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LayoutUnit RootInlineBox::lineSnapAdjustment(LayoutUnit delta) const
{
    // If our block doesn't have snapping turned on, do nothing.
    // FIXME: Implement bounds snapping.
    if (blockFlow().style().lineSnap() == LineSnapNone)
        return 0;

    // Get the current line grid and offset.
    LayoutState* layoutState = blockFlow().view().layoutState();
    RenderBlockFlow* lineGrid = layoutState->lineGrid();
    LayoutSize lineGridOffset = layoutState->lineGridOffset();
    if (!lineGrid || lineGrid->style().writingMode() != blockFlow().style().writingMode())
        return 0;

    // Get the hypothetical line box used to establish the grid.
    RootInlineBox* lineGridBox = lineGrid->lineGridBox();
    if (!lineGridBox)
        return 0;
    
    LayoutUnit lineGridBlockOffset = lineGrid->isHorizontalWritingMode() ? lineGridOffset.height() : lineGridOffset.width();
    LayoutUnit blockOffset = blockFlow().isHorizontalWritingMode() ? layoutState->layoutOffset().height() : layoutState->layoutOffset().width();

    // Now determine our position on the grid. Our baseline needs to be adjusted to the nearest baseline multiple
    // as established by the line box.
    // FIXME: Need to handle crazy line-box-contain values that cause the root line box to not be considered. I assume
    // the grid should honor line-box-contain.
    LayoutUnit gridLineHeight = lineGridBox->lineBottomWithLeading() - lineGridBox->lineTopWithLeading();
    if (!gridLineHeight)
        return 0;

    LayoutUnit lineGridFontAscent = lineGrid->style().fontMetrics().ascent(baselineType());
    LayoutUnit lineGridFontHeight = lineGridBox->logicalHeight();
    LayoutUnit firstTextTop = lineGridBlockOffset + lineGridBox->logicalTop();
    LayoutUnit firstLineTopWithLeading = lineGridBlockOffset + lineGridBox->lineTopWithLeading();
    LayoutUnit firstBaselinePosition = firstTextTop + lineGridFontAscent;

    LayoutUnit currentTextTop = blockOffset + logicalTop() + delta;
    LayoutUnit currentFontAscent = blockFlow().style().fontMetrics().ascent(baselineType());
    LayoutUnit currentBaselinePosition = currentTextTop + currentFontAscent;

    LayoutUnit lineGridPaginationOrigin = isHorizontal() ? layoutState->lineGridPaginationOrigin().height() : layoutState->lineGridPaginationOrigin().width();

    // If we're paginated, see if we're on a page after the first one. If so, the grid resets on subsequent pages.
    // FIXME: If the grid is an ancestor of the pagination establisher, then this is incorrect.
    LayoutUnit pageLogicalTop = 0;
    if (layoutState->isPaginated() && layoutState->pageLogicalHeight()) {
        pageLogicalTop = blockFlow().pageLogicalTopForOffset(lineTopWithLeading() + delta);
        if (pageLogicalTop > firstLineTopWithLeading)
            firstTextTop = pageLogicalTop + lineGridBox->logicalTop() - lineGrid->borderAndPaddingBefore() + lineGridPaginationOrigin;
    }

    if (blockFlow().style().lineSnap() == LineSnapContain) {
        // Compute the desired offset from the text-top of a grid line.
        // Look at our height (logicalHeight()).
        // Look at the total available height. It's going to be (textBottom - textTop) + (n-1)*(multiple with leading)
        // where n is number of grid lines required to enclose us.
        if (logicalHeight() <= lineGridFontHeight)
            firstTextTop += (lineGridFontHeight - logicalHeight()) / 2;
        else {
            LayoutUnit numberOfLinesWithLeading = ceilf(static_cast<float>(logicalHeight() - lineGridFontHeight) / gridLineHeight);
            LayoutUnit totalHeight = lineGridFontHeight + numberOfLinesWithLeading * gridLineHeight;
            firstTextTop += (totalHeight - logicalHeight()) / 2;
        }
        firstBaselinePosition = firstTextTop + currentFontAscent;
    } else
        firstBaselinePosition = firstTextTop + lineGridFontAscent;

    // If we're above the first line, just push to the first line.
    if (currentBaselinePosition < firstBaselinePosition)
        return delta + firstBaselinePosition - currentBaselinePosition;

    // Otherwise we're in the middle of the grid somewhere. Just push to the next line.
    LayoutUnit baselineOffset = currentBaselinePosition - firstBaselinePosition;
    LayoutUnit remainder = roundToInt(baselineOffset) % roundToInt(gridLineHeight);
    LayoutUnit result = delta;
    if (remainder)
        result += gridLineHeight - remainder;

    // If we aren't paginated we can return the result.
    if (!layoutState->isPaginated() || !layoutState->pageLogicalHeight() || result == delta)
        return result;
    
    // We may end up shifted to a new page. We need to do a re-snap when that happens.
    LayoutUnit newPageLogicalTop = blockFlow().pageLogicalTopForOffset(lineBottomWithLeading() + result);
    if (newPageLogicalTop == pageLogicalTop)
        return result;
    
    // Put ourselves at the top of the next page to force a snap onto the new grid established by that page.
    return lineSnapAdjustment(newPageLogicalTop - (blockOffset + lineTopWithLeading()));
}
unsigned MultiColumnFragmentainerGroup::columnIndexAtVisualPoint(const LayoutPoint& visualPoint) const
{
    bool isColumnProgressionInline = m_columnSet.multiColumnFlowThread()->progressionIsInline();
    bool isHorizontalWritingMode = m_columnSet.isHorizontalWritingMode();
    LayoutUnit columnLengthInColumnProgressionDirection = isColumnProgressionInline ? m_columnSet.pageLogicalWidth() : logicalHeight();
    LayoutUnit offsetInColumnProgressionDirection = isHorizontalWritingMode == isColumnProgressionInline ? visualPoint.x() : visualPoint.y();
    if (!m_columnSet.style()->isLeftToRightDirection() && isColumnProgressionInline)
        offsetInColumnProgressionDirection = m_columnSet.logicalWidth() - offsetInColumnProgressionDirection;
    LayoutUnit columnGap = m_columnSet.columnGap();
    if (columnLengthInColumnProgressionDirection + columnGap <= 0)
        return 0;
    // Column boundaries are in the middle of the column gap.
    int index = (offsetInColumnProgressionDirection + columnGap / 2) / (columnLengthInColumnProgressionDirection + columnGap);
    if (index < 0)
        return 0;
    return std::min(unsigned(index), actualColumnCount() - 1);
}