// scale the rect but round to smallest containing rect
nsRect& nsRect::ScaleRoundOut(float aScale)
{
nscoord right = NSToCoordCeil(float(XMost()) * aScale);
nscoord bottom = NSToCoordCeil(float(YMost()) * aScale);
x = NSToCoordFloor(float(x) * aScale);
y = NSToCoordFloor(float(y) * aScale);
width = (right - x);
height = (bottom - y);
return *this;
}
//------------------------------------------------------------------------------
void
nsPageFrame::PaintPageContent(nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt) {
nsIFrame* pageContentFrame = mFrames.FirstChild();
nsRect rect = aDirtyRect;
float scale = PresContext()->GetPageScale();
aRenderingContext.PushState();
nsPoint framePos = aPt + pageContentFrame->GetOffsetTo(this);
aRenderingContext.Translate(framePos.x, framePos.y);
// aPt translates to coords relative to this, then margins translate to
// pageContentFrame's coords
rect -= framePos;
aRenderingContext.Scale(scale, scale);
rect.ScaleRoundOut(1.0f / scale);
// Make sure we don't draw where we aren't supposed to draw, especially
// when printing selection
nsRect clipRect(nsPoint(0, 0), pageContentFrame->GetSize());
// Note: this computation matches how we compute maxSize.height
// in nsPageFrame::Reflow
nscoord expectedPageContentHeight =
NSToCoordCeil((GetSize().height - mPD->mReflowMargin.TopBottom()) / scale);
if (clipRect.height > expectedPageContentHeight) {
// We're doing print-selection, with one long page-content frame.
// Clip to the appropriate page-content slice for the current page.
NS_ASSERTION(mPageNum > 0, "page num should be positive");
// Note: The pageContentFrame's y-position has been set such that a zero
// y-value matches the top edge of the current page. So, to clip to the
// current page's content (in coordinates *relative* to the page content
// frame), we just negate its y-position and add the top margin.
clipRect.y = NSToCoordCeil((-pageContentFrame->GetRect().y +
mPD->mReflowMargin.top) / scale);
clipRect.height = expectedPageContentHeight;
NS_ASSERTION(clipRect.y < pageContentFrame->GetSize().height,
"Should be clipping to region inside the page content bounds");
}
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);
nsRect backgroundRect = nsRect(nsPoint(0, 0), pageContentFrame->GetSize());
nsCSSRendering::PaintBackground(PresContext(), aRenderingContext, this,
rect, backgroundRect,
nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES);
nsLayoutUtils::PaintFrame(&aRenderingContext, pageContentFrame,
nsRegion(rect), NS_RGBA(0,0,0,0),
nsLayoutUtils::PAINT_SYNC_DECODE_IMAGES);
aRenderingContext.PopState();
}
static void
GetTextRunBoundingMetrics(gfxTextRun *aTextRun, PRUint32 aStart, PRUint32 aLength,
nsThebesRenderingContext *aContext,
nsBoundingMetrics &aBoundingMetrics)
{
StubPropertyProvider provider;
gfxTextRun::Metrics theMetrics =
aTextRun->MeasureText(aStart, aLength, PR_TRUE, aContext->ThebesContext(), &provider);
aBoundingMetrics.leftBearing = NSToCoordFloor(theMetrics.mBoundingBox.X());
aBoundingMetrics.rightBearing = NSToCoordCeil(theMetrics.mBoundingBox.XMost());
aBoundingMetrics.width = NSToCoordRound(theMetrics.mAdvanceWidth);
aBoundingMetrics.ascent = NSToCoordCeil(- theMetrics.mBoundingBox.Y());
aBoundingMetrics.descent = NSToCoordCeil(theMetrics.mBoundingBox.YMost());
}
nscoord
nsMathMLmfracFrame::CalcLineThickness(nsPresContext* aPresContext,
nsStyleContext* aStyleContext,
nsString& aThicknessAttribute,
nscoord onePixel,
nscoord aDefaultRuleThickness)
{
nscoord defaultThickness = aDefaultRuleThickness;
nscoord lineThickness = aDefaultRuleThickness;
nscoord minimumThickness = onePixel;
// linethickness
//
// "Specifies the thickness of the horizontal 'fraction bar', or 'rule'. The
// default value is 'medium', 'thin' is thinner, but visible, 'thick' is
// thicker; the exact thickness of these is left up to the rendering agent."
//
// values: length | "thin" | "medium" | "thick"
// default: medium
//
if (!aThicknessAttribute.IsEmpty()) {
if (aThicknessAttribute.EqualsLiteral("thin")) {
lineThickness = NSToCoordFloor(defaultThickness * THIN_FRACTION_LINE);
minimumThickness = onePixel * THIN_FRACTION_LINE_MINIMUM_PIXELS;
// should visually decrease by at least one pixel, if default is not a pixel
if (defaultThickness > onePixel && lineThickness > defaultThickness - onePixel)
lineThickness = defaultThickness - onePixel;
}
else if (aThicknessAttribute.EqualsLiteral("medium")) {
// medium is default
}
else if (aThicknessAttribute.EqualsLiteral("thick")) {
lineThickness = NSToCoordCeil(defaultThickness * THICK_FRACTION_LINE);
minimumThickness = onePixel * THICK_FRACTION_LINE_MINIMUM_PIXELS;
// should visually increase by at least one pixel
if (lineThickness < defaultThickness + onePixel)
lineThickness = defaultThickness + onePixel;
}
else {
// length value
lineThickness = defaultThickness;
ParseNumericValue(aThicknessAttribute, &lineThickness,
nsMathMLElement::PARSE_ALLOW_UNITLESS,
aPresContext, aStyleContext);
}
}
// use minimum if the lineThickness is a non-zero value less than minimun
if (lineThickness && lineThickness < minimumThickness)
lineThickness = minimumThickness;
return lineThickness;
}
nscoord
nsMathMLmfracFrame::CalcLineThickness(nsPresContext* aPresContext,
nsStyleContext* aStyleContext,
nsString& aThicknessAttribute,
nscoord onePixel,
nscoord aDefaultRuleThickness)
{
nscoord defaultThickness = aDefaultRuleThickness;
nscoord lineThickness = aDefaultRuleThickness;
nscoord minimumThickness = onePixel;
if (!aThicknessAttribute.IsEmpty()) {
if (aThicknessAttribute.EqualsLiteral("thin")) {
lineThickness = NSToCoordFloor(defaultThickness * THIN_FRACTION_LINE);
minimumThickness = onePixel * THIN_FRACTION_LINE_MINIMUM_PIXELS;
// should visually decrease by at least one pixel, if default is not a pixel
if (defaultThickness > onePixel && lineThickness > defaultThickness - onePixel)
lineThickness = defaultThickness - onePixel;
}
else if (aThicknessAttribute.EqualsLiteral("medium")) {
lineThickness = NSToCoordRound(defaultThickness * MEDIUM_FRACTION_LINE);
minimumThickness = onePixel * MEDIUM_FRACTION_LINE_MINIMUM_PIXELS;
// should visually increase by at least one pixel
if (lineThickness < defaultThickness + onePixel)
lineThickness = defaultThickness + onePixel;
}
else if (aThicknessAttribute.EqualsLiteral("thick")) {
lineThickness = NSToCoordCeil(defaultThickness * THICK_FRACTION_LINE);
minimumThickness = onePixel * THICK_FRACTION_LINE_MINIMUM_PIXELS;
// should visually increase by at least two pixels
if (lineThickness < defaultThickness + 2*onePixel)
lineThickness = defaultThickness + 2*onePixel;
}
else { // see if it is a plain number, or a percentage, or a h/v-unit like 1ex, 2px, 1em
nsCSSValue cssValue;
if (ParseNumericValue(aThicknessAttribute, cssValue)) {
nsCSSUnit unit = cssValue.GetUnit();
if (eCSSUnit_Number == unit)
lineThickness = nscoord(float(defaultThickness) * cssValue.GetFloatValue());
else if (eCSSUnit_Percent == unit)
lineThickness = nscoord(float(defaultThickness) * cssValue.GetPercentValue());
else if (eCSSUnit_Null != unit)
lineThickness = CalcLength(aPresContext, aStyleContext, cssValue);
}
}
}
// use minimum if the lineThickness is a non-zero value less than minimun
if (lineThickness && lineThickness < minimumThickness)
lineThickness = minimumThickness;
return lineThickness;
}
nsBoundingMetrics
nsFontMetrics::GetBoundingMetrics(const PRUnichar *aString, PRUint32 aLength,
nsRenderingContext *aContext)
{
if (aLength == 0)
return nsBoundingMetrics();
StubPropertyProvider provider;
AutoTextRun textRun(this, aContext, aString, aLength);
gfxTextRun::Metrics theMetrics =
textRun->MeasureText(0, aLength,
gfxFont::TIGHT_HINTED_OUTLINE_EXTENTS,
aContext->ThebesContext(), &provider);
nsBoundingMetrics m;
m.leftBearing = NSToCoordFloor( theMetrics.mBoundingBox.X());
m.rightBearing = NSToCoordCeil( theMetrics.mBoundingBox.XMost());
m.ascent = NSToCoordCeil( -theMetrics.mBoundingBox.Y());
m.descent = NSToCoordCeil( theMetrics.mBoundingBox.YMost());
m.width = NSToCoordRound( theMetrics.mAdvanceWidth);
return m;
}
static nsBoundingMetrics
GetTextBoundingMetrics(nsFontMetrics* aMetrics, const char16_t* aString,
uint32_t aLength, mozilla::gfx::DrawTarget* aDrawTarget,
gfxFont::BoundingBoxType aType)
{
if (aLength == 0)
return nsBoundingMetrics();
StubPropertyProvider provider;
AutoTextRun textRun(aMetrics, aDrawTarget, aString, aLength);
nsBoundingMetrics m;
if (textRun.get()) {
gfxTextRun::Metrics theMetrics = textRun->MeasureText(
gfxTextRun::Range(0, aLength), aType, aDrawTarget, &provider);
m.leftBearing = NSToCoordFloor( theMetrics.mBoundingBox.X());
m.rightBearing = NSToCoordCeil( theMetrics.mBoundingBox.XMost());
m.ascent = NSToCoordCeil( -theMetrics.mBoundingBox.Y());
m.descent = NSToCoordCeil( theMetrics.mBoundingBox.YMost());
m.width = NSToCoordRound( theMetrics.mAdvanceWidth);
}
return m;
}
static nsBoundingMetrics
GetTextBoundingMetrics(nsFontMetrics* aMetrics, const PRUnichar *aString, uint32_t aLength,
nsRenderingContext *aContext, gfxFont::BoundingBoxType aType)
{
if (aLength == 0)
return nsBoundingMetrics();
StubPropertyProvider provider;
AutoTextRun textRun(aMetrics, aContext, aString, aLength);
nsBoundingMetrics m;
if (textRun.get()) {
gfxTextRun::Metrics theMetrics =
textRun->MeasureText(0, aLength,
aType,
aContext->ThebesContext(), &provider);
m.leftBearing = NSToCoordFloor( theMetrics.mBoundingBox.X());
m.rightBearing = NSToCoordCeil( theMetrics.mBoundingBox.XMost());
m.ascent = NSToCoordCeil( -theMetrics.mBoundingBox.Y());
m.descent = NSToCoordCeil( theMetrics.mBoundingBox.YMost());
m.width = NSToCoordRound( theMetrics.mAdvanceWidth);
}
return m;
}
//------------------------------------------------------------------------------
void
nsPageFrame::PaintPageContent(nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt) {
nsIFrame* pageContentFrame = mFrames.FirstChild();
nsRect rect = aDirtyRect;
float scale = PresContext()->GetPageScale();
aRenderingContext.PushState();
nsPoint framePos = aPt + pageContentFrame->GetOffsetTo(this);
aRenderingContext.Translate(framePos.x, framePos.y);
// aPt translates to coords relative to this, then margins translate to
// pageContentFrame's coords
rect -= framePos;
aRenderingContext.Scale(scale, scale);
rect.ScaleRoundOut(1.0f / scale);
// Make sure we don't draw where we aren't supposed to draw, especially
// when printing selection
nsRect clipRect(nsPoint(0, 0), pageContentFrame->GetSize());
// Note: this computation matches how we compute maxSize.height
// in nsPageFrame::Reflow
nscoord expectedPageContentHeight =
NSToCoordCeil((GetSize().height - mPD->mReflowMargin.TopBottom()) / scale);
if (clipRect.height > expectedPageContentHeight) {
// We're doing print-selection, with one long page-content frame.
// Clip to the appropriate page-content slice for the current page.
NS_ASSERTION(mPageNum > 0, "page num should be positive");
clipRect.y = expectedPageContentHeight * (mPageNum - 1);
clipRect.height = expectedPageContentHeight;
NS_ASSERTION(clipRect.y < pageContentFrame->GetSize().height,
"Should be clipping to region inside the page content bounds");
}
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);
const nsStyleBorder* border = GetStyleBorder();
const nsStylePadding* padding = GetStylePadding();
nsRect backgroundRect = nsRect(nsPoint(0, 0), pageContentFrame->GetSize());
nsCSSRendering::PaintBackground(PresContext(), aRenderingContext, this,
rect, backgroundRect, *border, *padding,
PR_TRUE);
nsLayoutUtils::PaintFrame(&aRenderingContext, pageContentFrame,
nsRegion(rect), NS_RGBA(0,0,0,0));
aRenderingContext.PopState();
}
NS_IMETHODIMP nsPageFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsPageFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
aStatus = NS_FRAME_COMPLETE; // initialize out parameter
NS_ASSERTION(mFrames.FirstChild() &&
nsGkAtoms::pageContentFrame == mFrames.FirstChild()->GetType(),
"pageFrame must have a pageContentFrame child");
// Resize our frame allowing it only to be as big as we are
// XXX Pay attention to the page's border and padding...
if (mFrames.NotEmpty()) {
nsIFrame* frame = mFrames.FirstChild();
// When the reflow size is NS_UNCONSTRAINEDSIZE it means we are reflowing
// a single page to print selection. So this means we want to use
// NS_UNCONSTRAINEDSIZE without altering it
nscoord avHeight;
if (mPD->mReflowSize.height == NS_UNCONSTRAINEDSIZE) {
avHeight = NS_UNCONSTRAINEDSIZE;
} else {
avHeight = mPD->mReflowSize.height - mPD->mReflowMargin.TopBottom();
}
nsSize maxSize(mPD->mReflowSize.width - mPD->mReflowMargin.LeftRight(),
avHeight);
float scale = aPresContext->GetPageScale();
maxSize.width = NSToCoordCeil(maxSize.width / scale);
if (maxSize.height != NS_UNCONSTRAINEDSIZE) {
maxSize.height = NSToCoordCeil(maxSize.height / scale);
}
// Get the number of Twips per pixel from the PresContext
nscoord onePixelInTwips = nsPresContext::CSSPixelsToAppUnits(1);
// insurance against infinite reflow, when reflowing less than a pixel
// XXX Shouldn't we do something more friendly when invalid margins
// are set?
if (maxSize.width < onePixelInTwips || maxSize.height < onePixelInTwips) {
aDesiredSize.width = 0;
aDesiredSize.height = 0;
NS_WARNING("Reflow aborted; no space for content");
return NS_OK;
}
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize);
kidReflowState.mFlags.mIsTopOfPage = PR_TRUE;
kidReflowState.mFlags.mTableIsSplittable = PR_TRUE;
// calc location of frame
nscoord xc = mPD->mReflowMargin.left + mPD->mExtraMargin.left;
nscoord yc = mPD->mReflowMargin.top + mPD->mExtraMargin.top;
// Get the child's desired size
ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, xc, yc, 0, aStatus);
// Place and size the child
FinishReflowChild(frame, aPresContext, &kidReflowState, aDesiredSize, xc, yc, 0);
NS_ASSERTION(!NS_FRAME_IS_FULLY_COMPLETE(aStatus) ||
!frame->GetNextInFlow(), "bad child flow list");
}
PR_PL(("PageFrame::Reflow %p ", this));
PR_PL(("[%d,%d][%d,%d]\n", aDesiredSize.width, aDesiredSize.height, aReflowState.availableWidth, aReflowState.availableHeight));
// Return our desired size
aDesiredSize.width = aReflowState.availableWidth;
if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
aDesiredSize.height = aReflowState.availableHeight;
}
PR_PL(("PageFrame::Reflow %p ", this));
PR_PL(("[%d,%d]\n", aReflowState.availableWidth, aReflowState.availableHeight));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
//------------------------------------------------------------------------------
NS_IMETHODIMP
nsPageFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
nsDisplayListCollection set;
nsresult rv;
if (PresContext()->IsScreen()) {
rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
nsDisplayList content;
nsIFrame *child = mFrames.FirstChild();
rv = child->BuildDisplayListForStackingContext(aBuilder, aDirtyRect - child->GetOffsetTo(this), &content);
NS_ENSURE_SUCCESS(rv, rv);
// We may need to paint out-of-flow frames whose placeholders are
// on other pages. Add those pages to our display list. Note that
// out-of-flow frames can't be placed after their placeholders so
// we don't have to process earlier pages. The display lists for
// these extra pages are pruned so that only display items for the
// page we currently care about (which we would have reached by
// following placeholders to their out-of-flows) end up on the list.
nsIFrame* page = child;
nscoord y = child->GetSize().height;
while ((page = GetNextPage(page)) != nullptr) {
rv = BuildDisplayListForExtraPage(aBuilder, page, y, &content);
if (NS_FAILED(rv))
break;
y += page->GetSize().height;
}
float scale = PresContext()->GetPageScale();
nsRect clipRect(nsPoint(0, 0), child->GetSize());
// Note: this computation matches how we compute maxSize.height
// in nsPageFrame::Reflow
nscoord expectedPageContentHeight =
NSToCoordCeil((GetSize().height - mPD->mReflowMargin.TopBottom()) / scale);
if (clipRect.height > expectedPageContentHeight) {
// We're doing print-selection, with one long page-content frame.
// Clip to the appropriate page-content slice for the current page.
NS_ASSERTION(mPageNum > 0, "page num should be positive");
// Note: The pageContentFrame's y-position has been set such that a zero
// y-value matches the top edge of the current page. So, to clip to the
// current page's content (in coordinates *relative* to the page content
// frame), we just negate its y-position and add the top margin.
clipRect.y = NSToCoordCeil((-child->GetRect().y +
mPD->mReflowMargin.top) / scale);
clipRect.height = expectedPageContentHeight;
NS_ASSERTION(clipRect.y < child->GetSize().height,
"Should be clipping to region inside the page content bounds");
}
clipRect += aBuilder->ToReferenceFrame(child);
rv = content.AppendNewToTop(new (aBuilder) nsDisplayClip(aBuilder, child, &content, clipRect));
NS_ENSURE_SUCCESS(rv, rv);
rv = content.AppendNewToTop(new (aBuilder) nsDisplayTransform(aBuilder, child, &content, ::ComputePageTransform));
NS_ENSURE_SUCCESS(rv, rv);
set.Content()->AppendToTop(&content);
if (PresContext()->IsRootPaginatedDocument()) {
rv = set.Content()->AppendNewToTop(new (aBuilder)
nsDisplayGeneric(aBuilder, this, ::PaintHeaderFooter,
"HeaderFooter",
nsDisplayItem::TYPE_HEADER_FOOTER));
NS_ENSURE_SUCCESS(rv, rv);
}
set.MoveTo(aLists);
return NS_OK;
}
NS_IMETHODIMP
nsSVGForeignObjectFrame::PaintSVG(nsSVGRenderState *aContext,
const nsIntRect *aDirtyRect)
{
if (IsDisabled())
return NS_OK;
nsIFrame* kid = GetFirstChild(nsnull);
if (!kid)
return NS_OK;
gfxMatrix matrixForChildren = GetCanvasTMForChildren();
gfxMatrix matrix = GetCanvasTM();
nsRenderingContext *ctx = aContext->GetRenderingContext(this);
if (!ctx || matrixForChildren.IsSingular()) {
NS_WARNING("Can't render foreignObject element!");
return NS_ERROR_FAILURE;
}
/* Check if we need to draw anything. */
if (aDirtyRect) {
PRInt32 appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
if (!mRect.ToOutsidePixels(appUnitsPerDevPx).Intersects(*aDirtyRect))
return NS_OK;
}
gfxContext *gfx = aContext->GetGfxContext();
gfx->Save();
if (GetStyleDisplay()->IsScrollableOverflow()) {
float x, y, width, height;
static_cast<nsSVGElement*>(mContent)->
GetAnimatedLengthValues(&x, &y, &width, &height, nsnull);
gfxRect clipRect =
nsSVGUtils::GetClipRectForFrame(this, 0.0f, 0.0f, width, height);
nsSVGUtils::SetClipRect(gfx, matrix, clipRect);
}
gfx->Multiply(matrixForChildren);
// Transform the dirty rect into the rectangle containing the
// transformed dirty rect.
gfxMatrix invmatrix = matrix.Invert();
NS_ASSERTION(!invmatrix.IsSingular(),
"inverse of non-singular matrix should be non-singular");
gfxRect transDirtyRect = gfxRect(aDirtyRect->x, aDirtyRect->y,
aDirtyRect->width, aDirtyRect->height);
transDirtyRect = invmatrix.TransformBounds(transDirtyRect);
transDirtyRect.Scale(nsPresContext::AppUnitsPerCSSPixel());
nsPoint tl(NSToCoordFloor(transDirtyRect.X()),
NSToCoordFloor(transDirtyRect.Y()));
nsPoint br(NSToCoordCeil(transDirtyRect.XMost()),
NSToCoordCeil(transDirtyRect.YMost()));
nsRect kidDirtyRect(tl.x, tl.y, br.x - tl.x, br.y - tl.y);
kidDirtyRect.IntersectRect(kidDirtyRect, kid->GetRect());
PRUint32 flags = nsLayoutUtils::PAINT_IN_TRANSFORM;
if (aContext->IsPaintingToWindow()) {
flags |= nsLayoutUtils::PAINT_TO_WINDOW;
}
nsresult rv = nsLayoutUtils::PaintFrame(ctx, kid, nsRegion(kidDirtyRect),
NS_RGBA(0,0,0,0), flags);
gfx->Restore();
return rv;
}
