C++ selectionState函数代码示例

IntRect RenderSVGInlineText::selectionRectForRepaint(RenderBoxModelObject* repaintContainer, bool /*clipToVisibleContent*/)
{
    ASSERT(!needsLayout());

    if (selectionState() == SelectionNone)
        return IntRect();

    // Early exit if we're ie. a <text> within a <defs> section.
    if (isChildOfHiddenContainer(this))
        return IntRect();

    // Now calculate startPos and endPos for painting selection.
    // We include a selection while endPos > 0
    int startPos, endPos;
    if (selectionState() == SelectionInside) {
        // We are fully selected.
        startPos = 0;
        endPos = textLength();
    } else {
        selectionStartEnd(startPos, endPos);
        if (selectionState() == SelectionStart)
            endPos = textLength();
        else if (selectionState() == SelectionEnd)
            startPos = 0;
    }

    if (startPos == endPos)
        return IntRect();

    return computeRepaintRectForRange(repaintContainer, startPos, endPos);
}

void RenderReplaced::paint(PaintInfo& paintInfo, int tx, int ty)
{
    if (!shouldPaint(paintInfo, tx, ty))
        return;
    
    tx += x();
    ty += y();
    
    if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 
        paintBoxDecorations(paintInfo, tx, ty);
    
    if (paintInfo.phase == PaintPhaseMask) {
        paintMask(paintInfo, tx, ty);
        return;
    }

    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
        paintOutline(paintInfo.context, tx, ty, width(), height());
    
    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)
        return;
    
    if (!paintInfo.shouldPaintWithinRoot(this))
        return;
    
    bool drawSelectionTint = selectionState() != SelectionNone && !document()->printing();
    if (paintInfo.phase == PaintPhaseSelection) {
        if (selectionState() == SelectionNone)
            return;
        drawSelectionTint = false;
    }

    bool completelyClippedOut = false;
    if (style()->hasBorderRadius()) {
        IntRect borderRect = IntRect(tx, ty, width(), height());

        if (borderRect.isEmpty())
            completelyClippedOut = true;
        else {
            // Push a clip if we have a border radius, since we want to round the foreground content that gets painted.
            paintInfo.context->save();
            paintInfo.context->addRoundedRectClip(style()->getRoundedBorderFor(borderRect));
        }
    }

    if (!completelyClippedOut) {
        paintReplaced(paintInfo, tx, ty);

        if (style()->hasBorderRadius())
            paintInfo.context->restore();
    }
        
    // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of
    // surrounding content.
    if (drawSelectionTint) {
        IntRect selectionPaintingRect = localSelectionRect();
        selectionPaintingRect.move(tx, ty);
        paintInfo.context->fillRect(selectionPaintingRect, selectionBackgroundColor(), style()->colorSpace());
    }
}

void RenderReplaced::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    if (!shouldPaint(paintInfo, paintOffset))
        return;
    
    LayoutPoint adjustedPaintOffset = paintOffset + location();
    
    if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 
        paintBoxDecorations(paintInfo, adjustedPaintOffset);
    
    if (paintInfo.phase == PaintPhaseMask) {
        paintMask(paintInfo, adjustedPaintOffset);
        return;
    }

    LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size());
    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
        paintOutline(paintInfo.context, paintRect);
    
    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && !canHaveChildren())
        return;
    
    if (!paintInfo.shouldPaintWithinRoot(this))
        return;
    
    bool drawSelectionTint = selectionState() != SelectionNone && !document()->printing();
    if (paintInfo.phase == PaintPhaseSelection) {
        if (selectionState() == SelectionNone)
            return;
        drawSelectionTint = false;
    }

    bool completelyClippedOut = false;
    if (style()->hasBorderRadius()) {
        LayoutRect borderRect = LayoutRect(adjustedPaintOffset, size());

        if (borderRect.isEmpty())
            completelyClippedOut = true;
        else {
            // Push a clip if we have a border radius, since we want to round the foreground content that gets painted.
            paintInfo.context->save();
            paintInfo.context->addRoundedRectClip(style()->getRoundedBorderFor(paintRect, view()));
        }
    }

    if (!completelyClippedOut) {
        paintReplaced(paintInfo, adjustedPaintOffset);

        if (style()->hasBorderRadius())
            paintInfo.context->restore();
    }
        
    // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of
    // surrounding content.
    if (drawSelectionTint) {
        LayoutRect selectionPaintingRect = localSelectionRect();
        selectionPaintingRect.moveBy(adjustedPaintOffset);
        paintInfo.context->fillRect(pixelSnappedIntRect(selectionPaintingRect), selectionBackgroundColor(), style()->colorSpace());
    }
}

IntRect RenderSVGInlineText::selectionRect(bool)
{
    ASSERT(!needsLayout());

    IntRect rect;
    if (selectionState() == SelectionNone)
        return rect;

    // Early exit if we're ie. a <text> within a <defs> section.
    if (isChildOfHiddenContainer(this))
        return rect;

    // Now calculate startPos and endPos for painting selection.
    // We include a selection while endPos > 0
    int startPos, endPos;
    if (selectionState() == SelectionInside) {
        // We are fully selected.
        startPos = 0;
        endPos = textLength();
    } else {
        selectionStartEnd(startPos, endPos);
        if (selectionState() == SelectionStart)
            endPos = textLength();
        else if (selectionState() == SelectionEnd)
            startPos = 0;
    }

    if (startPos == endPos)
        return rect;

    return computeAbsoluteRectForRange(startPos, endPos);
}

GapRects RenderBlockFlow::inlineSelectionGaps(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
    LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo* paintInfo)
{
    GapRects result;

    bool containsStart = selectionState() == SelectionStart || selectionState() == SelectionBoth;

    if (!firstLineBox()) {
        if (containsStart) {
            // Go ahead and update our lastLogicalTop to be the bottom of the block.  <hr>s or empty blocks with height can trip this
            // case.
            lastLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + logicalHeight();
            lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, logicalHeight());
            lastLogicalRight = logicalRightSelectionOffset(rootBlock, logicalHeight());
        }
        return result;
    }

    RootInlineBox* lastSelectedLine = 0;
    RootInlineBox* curr;
    for (curr = firstRootBox(); curr && !curr->hasSelectedChildren(); curr = curr->nextRootBox()) { }

    // Now paint the gaps for the lines.
    for (; curr && curr->hasSelectedChildren(); curr = curr->nextRootBox()) {
        LayoutUnit selTop =  curr->selectionTopAdjustedForPrecedingBlock();
        LayoutUnit selHeight = curr->selectionHeightAdjustedForPrecedingBlock();

        if (!containsStart && !lastSelectedLine && selectionState() != SelectionStart && selectionState() != SelectionBoth) {
            result.uniteCenter(blockSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, lastLogicalTop,
                lastLogicalLeft, lastLogicalRight, selTop, paintInfo));
        }

        LayoutRect logicalRect(curr->logicalLeft(), selTop, curr->logicalWidth(), selTop + selHeight);
        logicalRect.move(offsetFromRootBlock);
        LayoutRect physicalRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect);
        if (!paintInfo || (physicalRect.y() < paintInfo->rect.maxY() && physicalRect.maxY() > paintInfo->rect.y()))
            result.unite(curr->lineSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, selTop, selHeight, paintInfo));

        lastSelectedLine = curr;
    }

    if (containsStart && !lastSelectedLine) {
        // VisibleSelection must start just after our last line.
        lastSelectedLine = lastRootBox();
    }

    if (lastSelectedLine && selectionState() != SelectionEnd && selectionState() != SelectionBoth) {
        // Go ahead and update our lastY to be the bottom of the last selected line.
        lastLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + lastSelectedLine->selectionBottom();
        lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, lastSelectedLine->selectionBottom());
        lastLogicalRight = logicalRightSelectionOffset(rootBlock, lastSelectedLine->selectionBottom());
    }
    return result;
}

EventCommand* DialogCommandChangeState::getCommand() const{
    QVector<QString> command;
    selectionState(command);
    operation(command);

    return new EventCommand(EventCommandKind::ChangeState, command);
}

void EllipsisBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
{
    GraphicsContext* context = paintInfo.context;
    RenderStyle* style = renderer().style(isFirstLineStyle());
    const Font& font = style->font();
    FloatPoint boxOrigin = locationIncludingFlipping();
    boxOrigin.moveBy(FloatPoint(paintOffset));
    if (!isHorizontal())
        boxOrigin.move(0, -virtualLogicalHeight());
    FloatRect boxRect(boxOrigin, LayoutSize(logicalWidth(), virtualLogicalHeight()));
    GraphicsContextStateSaver stateSaver(*context);
    if (!isHorizontal())
        context->concatCTM(InlineTextBox::rotation(boxRect, InlineTextBox::Clockwise));
    FloatPoint textOrigin(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent());

    bool isPrinting = renderer().document().printing();
    bool haveSelection = !isPrinting && paintInfo.phase != PaintPhaseTextClip && selectionState() != RenderObject::SelectionNone;

    if (haveSelection)
        paintSelection(context, boxOrigin, style, font);
    else if (paintInfo.phase == PaintPhaseSelection)
        return;

    TextPainter::Style textStyle = TextPainter::textPaintingStyle(renderer(), style, paintInfo.forceBlackText(), isPrinting);
    if (haveSelection)
        textStyle = TextPainter::selectionPaintingStyle(renderer(), true, paintInfo.forceBlackText(), isPrinting, textStyle);

    TextRun textRun = constructTextRun(&renderer(), font, m_str, style, TextRun::AllowTrailingExpansion);
    TextPainter textPainter(context, font, textRun, textOrigin, boxRect, isHorizontal());
    textPainter.paint(0, m_str.length(), m_str.length(), textStyle);

    paintMarkupBox(paintInfo, paintOffset, lineTop, lineBottom, style);
}

void SVGInlineTextBox::paintSelectionBackground(PaintInfo& paintInfo)
{
    ASSERT(paintInfo.shouldPaintWithinRoot(renderer()));
    ASSERT(paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection);
    ASSERT(truncation() == cNoTruncation);

    if (renderer()->style()->visibility() != VISIBLE)
        return;

    RenderObject* parentRenderer = parent()->renderer();
    ASSERT(parentRenderer);
    ASSERT(!parentRenderer->document().printing());

    // Determine whether or not we're selected.
    bool paintSelectedTextOnly = paintInfo.phase == PaintPhaseSelection;
    bool hasSelection = selectionState() != RenderObject::SelectionNone;
    if (!hasSelection || paintSelectedTextOnly)
        return;

    Color backgroundColor = renderer()->selectionBackgroundColor();
    if (!backgroundColor.alpha())
        return;

    RenderSVGInlineText* textRenderer = toRenderSVGInlineText(this->textRenderer());
    ASSERT(textRenderer);
    if (!textShouldBePainted(textRenderer))
        return;

    RenderStyle* style = parentRenderer->style();
    ASSERT(style);

    int startPosition, endPosition;
    selectionStartEnd(startPosition, endPosition);

    int fragmentStartPosition = 0;
    int fragmentEndPosition = 0;
    AffineTransform fragmentTransform;
    unsigned textFragmentsSize = m_textFragments.size();
    for (unsigned i = 0; i < textFragmentsSize; ++i) {
        SVGTextFragment& fragment = m_textFragments.at(i);
        ASSERT(!m_paintingResource);

        fragmentStartPosition = startPosition;
        fragmentEndPosition = endPosition;
        if (!mapStartEndPositionsIntoFragmentCoordinates(fragment, fragmentStartPosition, fragmentEndPosition))
            continue;

        GraphicsContextStateSaver stateSaver(*paintInfo.context);
        fragment.buildFragmentTransform(fragmentTransform);
        if (!fragmentTransform.isIdentity())
            paintInfo.context->concatCTM(fragmentTransform);

        paintInfo.context->setFillColor(backgroundColor);
        paintInfo.context->fillRect(selectionRectForTextFragment(fragment, fragmentStartPosition, fragmentEndPosition, style), backgroundColor);

        m_paintingResourceMode = ApplyToDefaultMode;
    }

    ASSERT(!m_paintingResource);
}

void SVGRootInlineBox::paint(PaintInfo& paintInfo, const LayoutPoint&, LayoutUnit, LayoutUnit)
{
    ASSERT(paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection);
    ASSERT(!paintInfo.context->paintingDisabled());

    bool isPrinting = renderSVGText().document().printing();
    bool hasSelection = !isPrinting && selectionState() != RenderObject::SelectionNone;

    PaintInfo childPaintInfo(paintInfo);
    if (hasSelection) {
        for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) {
            if (child->isSVGInlineTextBox())
                toSVGInlineTextBox(child)->paintSelectionBackground(childPaintInfo);
            else if (child->isSVGInlineFlowBox())
                toSVGInlineFlowBox(child)->paintSelectionBackground(childPaintInfo);
        }
    }

    SVGRenderingContext renderingContext(renderSVGText(), paintInfo, SVGRenderingContext::SaveGraphicsContext);
    if (renderingContext.isRenderingPrepared()) {
        for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) {
            if (child->isSVGInlineTextBox())
                SVGInlineFlowBox::computeTextMatchMarkerRectForRenderer(&toSVGInlineTextBox(child)->renderer());

            child->paint(paintInfo, LayoutPoint(), 0, 0);
        }
    }
}

void EllipsisBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
{
    GraphicsContext* context = paintInfo.context;
    RenderStyle* style = renderer().style(isFirstLineStyle());

    const Font& font = style->font();
    FloatPoint boxOrigin = locationIncludingFlipping();
    boxOrigin.moveBy(FloatPoint(paintOffset));
    if (!isHorizontal())
        boxOrigin.move(0, -virtualLogicalHeight());
    FloatRect boxRect(boxOrigin, LayoutSize(logicalWidth(), virtualLogicalHeight()));
    GraphicsContextStateSaver stateSaver(*context);
    if (!isHorizontal())
        context->concatCTM(InlineTextBox::rotation(boxRect, InlineTextBox::Clockwise));
    FloatPoint textOrigin = FloatPoint(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent());

    Color styleTextColor = renderer().resolveColor(style, CSSPropertyWebkitTextFillColor);
    if (styleTextColor != context->fillColor())
        context->setFillColor(styleTextColor);

    if (selectionState() != RenderObject::SelectionNone) {
        paintSelection(context, boxOrigin, style, font);

        // Select the correct color for painting the text.
        Color foreground = paintInfo.forceBlackText() ? Color::black : renderer().selectionForegroundColor();
        if (foreground != styleTextColor)
            context->setFillColor(foreground);
    }

    // Text shadows are disabled when printing. http://crbug.com/258321
    const ShadowList* shadowList = context->printing() ? 0 : style->textShadow();
    bool hasShadow = shadowList;
    if (hasShadow) {
        OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create();
        for (size_t i = shadowList->shadows().size(); i--; ) {
            const ShadowData& shadow = shadowList->shadows()[i];
            float shadowX = isHorizontal() ? shadow.x() : shadow.y();
            float shadowY = isHorizontal() ? shadow.y() : -shadow.x();
            FloatSize offset(shadowX, shadowY);
            drawLooperBuilder->addShadow(offset, shadow.blur(), shadow.color(),
                DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha);
        }
        drawLooperBuilder->addUnmodifiedContent();
        context->setDrawLooper(drawLooperBuilder.release());
    }

    TextRun textRun = RenderBlockFlow::constructTextRun(&renderer(), font, m_str, style, TextRun::AllowTrailingExpansion);
    TextRunPaintInfo textRunPaintInfo(textRun);
    textRunPaintInfo.bounds = boxRect;
    context->drawText(font, textRunPaintInfo, textOrigin);

    // Restore the regular fill color.
    if (styleTextColor != context->fillColor())
        context->setFillColor(styleTextColor);

    if (hasShadow)
        context->clearDrawLooper();

    paintMarkupBox(paintInfo, paintOffset, lineTop, lineBottom, style);
}

void RenderWidget::setSelectionState(SelectionState state)
{
    if (selectionState() != state) {
        RenderReplaced::setSelectionState(state);
        if (m_widget)
            m_widget->setIsSelected(isSelected());
    }
}

void RenderBoxModelObject::setSelectionState(SelectionState state)
{
    if (state == SelectionInside && selectionState() != SelectionNone)
        return;

    if ((state == SelectionStart && selectionState() == SelectionEnd)
        || (state == SelectionEnd && selectionState() == SelectionStart))
        RenderObject::setSelectionState(SelectionBoth);
    else
        RenderObject::setSelectionState(state);

    // FIXME: We should consider whether it is OK propagating to ancestor RenderInlines.
    // This is a workaround for http://webkit.org/b/32123
    // The containing block can be null in case of an orphaned tree.
    RenderBlock* containingBlock = this->containingBlock();
    if (containingBlock && !containingBlock->isRenderView())
        containingBlock->setSelectionState(state);
}

GapRects RootInlineBox::lineSelectionGap(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
    LayoutUnit selTop, LayoutUnit selHeight, const LogicalSelectionOffsetCaches& cache, const PaintInfo* paintInfo)
{
    RenderObject::SelectionState lineState = selectionState();

    bool leftGap, rightGap;
    blockFlow().getSelectionGapInfo(lineState, leftGap, rightGap);

    GapRects result;

    InlineBox* firstBox = firstSelectedBox();
    InlineBox* lastBox = lastSelectedBox();
    if (leftGap) {
        result.uniteLeft(blockFlow().logicalLeftSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, &firstBox->parent()->renderer(), firstBox->logicalLeft(),
            selTop, selHeight, cache, paintInfo));
    }
    if (rightGap) {
        result.uniteRight(blockFlow().logicalRightSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, &lastBox->parent()->renderer(), lastBox->logicalRight(),
            selTop, selHeight, cache, paintInfo));
    }

    // When dealing with bidi text, a non-contiguous selection region is possible.
    // e.g. The logical text aaaAAAbbb (capitals denote RTL text and non-capitals LTR) is layed out
    // visually as 3 text runs |aaa|bbb|AAA| if we select 4 characters from the start of the text the
    // selection will look like (underline denotes selection):
    // |aaa|bbb|AAA|
    //  ___       _
    // We can see that the |bbb| run is not part of the selection while the runs around it are.
    if (firstBox && firstBox != lastBox) {
        // Now fill in any gaps on the line that occurred between two selected elements.
        LayoutUnit lastLogicalLeft = firstBox->logicalRight();
        bool isPreviousBoxSelected = firstBox->selectionState() != RenderObject::SelectionNone;
        for (InlineBox* box = firstBox->nextLeafChild(); box; box = box->nextLeafChild()) {
            if (box->selectionState() != RenderObject::SelectionNone) {
                LayoutRect logicalRect(lastLogicalLeft, selTop, box->logicalLeft() - lastLogicalLeft, selHeight);
                logicalRect.move(renderer().isHorizontalWritingMode() ? offsetFromRootBlock : LayoutSize(offsetFromRootBlock.height(), offsetFromRootBlock.width()));
                LayoutRect gapRect = rootBlock.logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect);
                if (isPreviousBoxSelected && gapRect.width() > 0 && gapRect.height() > 0) {
                    if (paintInfo && box->parent()->renderer().style().visibility() == VISIBLE)
                        paintInfo->context->fillRect(gapRect, box->parent()->renderer().selectionBackgroundColor(), box->parent()->renderer().style().colorSpace());
                    // VisibleSelection may be non-contiguous, see comment above.
                    result.uniteCenter(gapRect);
                }
                lastLogicalLeft = box->logicalRight();
            }
            if (box == lastBox)
                break;
            isPreviousBoxSelected = box->selectionState() != RenderObject::SelectionNone;
        }
    }

    return result;
}

void RenderReplaced::paint(PaintInfo& paintInfo, int tx, int ty)
{
    if (!shouldPaint(paintInfo, tx, ty))
        return;
    
    tx += m_x;
    ty += m_y;
    
    if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 
        paintBoxDecorations(paintInfo, tx, ty);
    
    if (paintInfo.phase == PaintPhaseMask) {
        paintMask(paintInfo, tx, ty);
        return;
    }

    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
        paintOutline(paintInfo.context, tx, ty, width(), height(), style());
    
    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)
        return;
    
    if (!shouldPaintWithinRoot(paintInfo))
        return;
    
    bool drawSelectionTint = selectionState() != SelectionNone && !document()->printing();
    if (paintInfo.phase == PaintPhaseSelection) {
        if (selectionState() == SelectionNone)
            return;
        drawSelectionTint = false;
    }

    paintReplaced(paintInfo, tx, ty);
    
    if (drawSelectionTint) {
        IntRect selectionPaintingRect = localSelectionRect();
        selectionPaintingRect.move(tx, ty);
        paintInfo.context->fillRect(selectionPaintingRect, selectionBackgroundColor());
    }
}

LayoutRect LayoutListMarker::selectionRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const
{
    ASSERT(!needsLayout());

    if (selectionState() == SelectionNone || !inlineBoxWrapper())
        return LayoutRect();

    RootInlineBox& root = inlineBoxWrapper()->root();
    LayoutRect rect(0, root.selectionTop() - location().y(), size().width(), root.selectionHeight());
    mapToVisibleRectInAncestorSpace(paintInvalidationContainer, rect, nullptr);
    // FIXME: groupedMapping() leaks the squashing abstraction.
    if (paintInvalidationContainer->layer()->groupedMapping())
        PaintLayer::mapRectToPaintBackingCoordinates(paintInvalidationContainer, rect);
    return rect;
}