зеркало из https://github.com/mozilla/gecko-dev.git
Added code to do ebina style margins; perform horizontal alignment and relative positioning for blocks
This commit is contained in:
kipp
Родитель
c8f38f4ede
Коммит
382a176fe8
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@ -31,6 +31,7 @@
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#include "nsReflowCommand.h"
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#include "nsIFontMetrics.h"
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#include "nsHTMLFrame.h"
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#include "nsScrollFrame.h"
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#undef NOISY_REFLOW
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@ -699,20 +700,41 @@ nsLineLayout::ReflowChild(nsReflowCommand* aReflowCommand,
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negTopMargin = 0;
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posTopMargin = kidMargin.top;
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}
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nscoord maxPos =
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PR_MAX(mBlockReflowState.mPrevPosBottomMargin, posTopMargin);
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nscoord maxNeg =
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PR_MAX(mBlockReflowState.mPrevNegBottomMargin, negTopMargin);
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nscoord topMargin = maxPos - maxNeg;
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// Save away bottom margin information for later
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if (kidMargin.bottom < 0) {
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mBlockReflowState.mPrevNegBottomMargin = -kidMargin.bottom;
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mBlockReflowState.mPrevPosBottomMargin = 0;
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} else {
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mBlockReflowState.mPrevNegBottomMargin = 0;
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mBlockReflowState.mPrevPosBottomMargin = kidMargin.bottom;
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// XXX if (nav4_compatability)
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// Calculate the previous margin's positive and negative value.
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// If the current top margin is not defined by css then just use
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// what is cached in the block reflow state. Otherwise if the top
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// margin is defined by css then wipe out any synthetic margin.
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nscoord prevPos = mBlockReflowState.mPrevPosBottomMargin;
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nscoord prevNeg = mBlockReflowState.mPrevNegBottomMargin;
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if (eStyleUnit_Null != kidSpacing->mMargin.GetTopUnit()) {
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if (mBlockReflowState.mPrevMarginSynthetic) {
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prevPos = 0;
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prevNeg = 0;
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}
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}
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else {
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// When our top margin is not specified by css...act like
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// ebina's engine.
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if ((nsnull != mLine->mPrevLine) && !mLine->mPrevLine->mIsBlock) {
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// Supply a default top margin
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nsIStyleContext* blockSC;
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mBlock->GetStyleContext(mPresContext, blockSC);
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nsStyleFont* styleFont = (nsStyleFont*)
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blockSC->GetData(eStyleStruct_Font);
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nsIFontMetrics* fm = mPresContext->GetMetricsFor(styleFont->mFont);
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mBlockReflowState.mPrevNegBottomMargin = 0;
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mBlockReflowState.mPrevPosBottomMargin = fm->GetHeight();
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mBlockReflowState.mPrevMarginSynthetic = PR_TRUE;
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NS_RELEASE(fm);
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NS_RELEASE(blockSC);
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}
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}
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nscoord maxPos = PR_MAX(prevPos, posTopMargin);
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nscoord maxNeg = PR_MAX(prevNeg, negTopMargin);
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nscoord topMargin = maxPos - maxNeg;
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// This is no longer a break point
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mSavedState.mKidFrame = nsnull;
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@ -730,6 +752,43 @@ nsLineLayout::ReflowChild(nsReflowCommand* aReflowCommand,
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mSpaceManager, kidMetrics, kidReflowState,
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kidRect, kidReflowStatus);
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mSpaceManager->Translate(-dx, -mY);
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if ((0 == kidRect.width) && (0 == kidRect.height)) {
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// When a block child collapses into nothingness we don't apply
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// it's margins.
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mY -= topMargin;
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mBlockReflowState.mY -= topMargin;
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}
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else {
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// XXX if (nav4_compatability)
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// If the block frame we just reflowed has no bottom margin as
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// specified by css, then we supply our own.
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if (eStyleUnit_Null == kidSpacing->mMargin.GetBottomUnit()) {
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// ebina's engine uses the height of the font for the bottom margin.
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nsIStyleContext* blockSC;
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mBlock->GetStyleContext(mPresContext, blockSC);
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nsStyleFont* styleFont = (nsStyleFont*)
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blockSC->GetData(eStyleStruct_Font);
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nsIFontMetrics* fm = mPresContext->GetMetricsFor(styleFont->mFont);
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mBlockReflowState.mPrevNegBottomMargin = 0;
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mBlockReflowState.mPrevPosBottomMargin = fm->GetHeight();
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mBlockReflowState.mPrevMarginSynthetic = PR_TRUE;
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NS_RELEASE(fm);
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NS_RELEASE(blockSC);
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}
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else {
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// Save away bottom margin information for later
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if (kidMargin.bottom < 0) {
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mBlockReflowState.mPrevNegBottomMargin = -kidMargin.bottom;
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mBlockReflowState.mPrevPosBottomMargin = 0;
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} else {
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mBlockReflowState.mPrevNegBottomMargin = 0;
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mBlockReflowState.mPrevPosBottomMargin = kidMargin.bottom;
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}
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mBlockReflowState.mPrevMarginSynthetic = PR_FALSE;
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}
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}
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kidRect.x = dx;
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kidRect.y = mY;
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kidMetrics.width = kidRect.width;
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@ -1364,12 +1423,21 @@ nsLineLayout::CreateFrameFor(nsIContent* aKid)
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if (NS_OK == rv) {
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kidFrame->SetStyleContext(mPresContext, kidSC);
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}
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} else if (NS_STYLE_FLOAT_NONE != kidDisplay->mFloats) {
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}
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else if (NS_STYLE_FLOAT_NONE != kidDisplay->mFloats) {
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rv = nsPlaceholderFrame::NewFrame(&kidFrame, aKid, mBlock);
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if (NS_OK == rv) {
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kidFrame->SetStyleContext(mPresContext, kidSC);
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}
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} else if (nsnull == mKidPrevInFlow) {
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}
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else if ((NS_STYLE_OVERFLOW_SCROLL == kidDisplay->mOverflow) ||
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(NS_STYLE_OVERFLOW_AUTO == kidDisplay->mOverflow)) {
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rv = NS_NewScrollFrame(&kidFrame, aKid, mBlock);
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if (NS_OK == rv) {
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kidFrame->SetStyleContext(mPresContext, kidSC);
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}
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}
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else if (nsnull == mKidPrevInFlow) {
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// Create initial frame for the child
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nsIContentDelegate* kidDel;
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switch (kidDisplay->mDisplay) {
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@ -1576,9 +1644,8 @@ nsLineLayout::AlignChildren()
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// Block lines don't require (or allow!) alignment
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if (mLine->mIsBlock) {
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mLineHeight = mState.mMaxAscent + mState.mMaxDescent;
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return;
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}
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else {
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// Avoid alignment when we didn't actually reflow any frames and we
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// also didn't change the number of frames we had (which means the
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// pullup code didn't pull anything up). When this happens it means
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@ -1586,7 +1653,7 @@ nsLineLayout::AlignChildren()
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// work.
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if ((0 == mFramesReflowed) && (mOldChildCount == mLine->mChildCount)) {
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mLineHeight = mLine->mBounds.height;
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return;
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}
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}
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nsIStyleContextPtr blockSC;
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@ -1600,12 +1667,14 @@ nsLineLayout::AlignChildren()
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// First vertically align the children on the line; this will
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// compute the actual line height for us.
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if (!mLine->mIsBlock) {
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mLineHeight =
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nsCSSLayout::VerticallyAlignChildren(mPresContext, mBlock, blockFont,
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mY,
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mLine->mFirstChild,
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mLine->mChildCount,
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mAscents, mState.mMaxAscent);
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}
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// Now horizontally place the children
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nsCSSLayout::HorizontallyPlaceChildren(mPresContext, mBlock,
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@ -31,6 +31,7 @@
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#include "nsReflowCommand.h"
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#include "nsIFontMetrics.h"
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#include "nsHTMLFrame.h"
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#include "nsScrollFrame.h"
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#undef NOISY_REFLOW
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@ -699,20 +700,41 @@ nsLineLayout::ReflowChild(nsReflowCommand* aReflowCommand,
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negTopMargin = 0;
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posTopMargin = kidMargin.top;
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}
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nscoord maxPos =
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PR_MAX(mBlockReflowState.mPrevPosBottomMargin, posTopMargin);
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nscoord maxNeg =
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PR_MAX(mBlockReflowState.mPrevNegBottomMargin, negTopMargin);
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nscoord topMargin = maxPos - maxNeg;
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// Save away bottom margin information for later
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if (kidMargin.bottom < 0) {
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mBlockReflowState.mPrevNegBottomMargin = -kidMargin.bottom;
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mBlockReflowState.mPrevPosBottomMargin = 0;
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} else {
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mBlockReflowState.mPrevNegBottomMargin = 0;
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mBlockReflowState.mPrevPosBottomMargin = kidMargin.bottom;
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// XXX if (nav4_compatability)
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// Calculate the previous margin's positive and negative value.
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// If the current top margin is not defined by css then just use
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// what is cached in the block reflow state. Otherwise if the top
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// margin is defined by css then wipe out any synthetic margin.
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nscoord prevPos = mBlockReflowState.mPrevPosBottomMargin;
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nscoord prevNeg = mBlockReflowState.mPrevNegBottomMargin;
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if (eStyleUnit_Null != kidSpacing->mMargin.GetTopUnit()) {
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if (mBlockReflowState.mPrevMarginSynthetic) {
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prevPos = 0;
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prevNeg = 0;
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}
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}
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else {
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// When our top margin is not specified by css...act like
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// ebina's engine.
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if ((nsnull != mLine->mPrevLine) && !mLine->mPrevLine->mIsBlock) {
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// Supply a default top margin
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nsIStyleContext* blockSC;
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mBlock->GetStyleContext(mPresContext, blockSC);
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nsStyleFont* styleFont = (nsStyleFont*)
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blockSC->GetData(eStyleStruct_Font);
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nsIFontMetrics* fm = mPresContext->GetMetricsFor(styleFont->mFont);
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mBlockReflowState.mPrevNegBottomMargin = 0;
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mBlockReflowState.mPrevPosBottomMargin = fm->GetHeight();
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mBlockReflowState.mPrevMarginSynthetic = PR_TRUE;
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NS_RELEASE(fm);
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NS_RELEASE(blockSC);
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}
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}
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nscoord maxPos = PR_MAX(prevPos, posTopMargin);
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nscoord maxNeg = PR_MAX(prevNeg, negTopMargin);
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nscoord topMargin = maxPos - maxNeg;
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// This is no longer a break point
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mSavedState.mKidFrame = nsnull;
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@ -730,6 +752,43 @@ nsLineLayout::ReflowChild(nsReflowCommand* aReflowCommand,
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mSpaceManager, kidMetrics, kidReflowState,
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kidRect, kidReflowStatus);
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mSpaceManager->Translate(-dx, -mY);
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if ((0 == kidRect.width) && (0 == kidRect.height)) {
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// When a block child collapses into nothingness we don't apply
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// it's margins.
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mY -= topMargin;
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mBlockReflowState.mY -= topMargin;
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}
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else {
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// XXX if (nav4_compatability)
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// If the block frame we just reflowed has no bottom margin as
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// specified by css, then we supply our own.
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if (eStyleUnit_Null == kidSpacing->mMargin.GetBottomUnit()) {
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// ebina's engine uses the height of the font for the bottom margin.
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nsIStyleContext* blockSC;
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mBlock->GetStyleContext(mPresContext, blockSC);
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nsStyleFont* styleFont = (nsStyleFont*)
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blockSC->GetData(eStyleStruct_Font);
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nsIFontMetrics* fm = mPresContext->GetMetricsFor(styleFont->mFont);
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mBlockReflowState.mPrevNegBottomMargin = 0;
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mBlockReflowState.mPrevPosBottomMargin = fm->GetHeight();
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mBlockReflowState.mPrevMarginSynthetic = PR_TRUE;
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NS_RELEASE(fm);
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NS_RELEASE(blockSC);
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}
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else {
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// Save away bottom margin information for later
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if (kidMargin.bottom < 0) {
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mBlockReflowState.mPrevNegBottomMargin = -kidMargin.bottom;
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mBlockReflowState.mPrevPosBottomMargin = 0;
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} else {
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mBlockReflowState.mPrevNegBottomMargin = 0;
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mBlockReflowState.mPrevPosBottomMargin = kidMargin.bottom;
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}
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mBlockReflowState.mPrevMarginSynthetic = PR_FALSE;
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}
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}
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kidRect.x = dx;
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kidRect.y = mY;
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kidMetrics.width = kidRect.width;
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@ -1364,12 +1423,21 @@ nsLineLayout::CreateFrameFor(nsIContent* aKid)
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if (NS_OK == rv) {
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kidFrame->SetStyleContext(mPresContext, kidSC);
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}
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} else if (NS_STYLE_FLOAT_NONE != kidDisplay->mFloats) {
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}
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else if (NS_STYLE_FLOAT_NONE != kidDisplay->mFloats) {
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rv = nsPlaceholderFrame::NewFrame(&kidFrame, aKid, mBlock);
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if (NS_OK == rv) {
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kidFrame->SetStyleContext(mPresContext, kidSC);
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}
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} else if (nsnull == mKidPrevInFlow) {
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}
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else if ((NS_STYLE_OVERFLOW_SCROLL == kidDisplay->mOverflow) ||
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(NS_STYLE_OVERFLOW_AUTO == kidDisplay->mOverflow)) {
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rv = NS_NewScrollFrame(&kidFrame, aKid, mBlock);
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if (NS_OK == rv) {
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kidFrame->SetStyleContext(mPresContext, kidSC);
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}
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}
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else if (nsnull == mKidPrevInFlow) {
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// Create initial frame for the child
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nsIContentDelegate* kidDel;
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switch (kidDisplay->mDisplay) {
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@ -1576,9 +1644,8 @@ nsLineLayout::AlignChildren()
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// Block lines don't require (or allow!) alignment
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if (mLine->mIsBlock) {
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mLineHeight = mState.mMaxAscent + mState.mMaxDescent;
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return;
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}
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else {
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// Avoid alignment when we didn't actually reflow any frames and we
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// also didn't change the number of frames we had (which means the
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// pullup code didn't pull anything up). When this happens it means
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@ -1586,7 +1653,7 @@ nsLineLayout::AlignChildren()
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// work.
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if ((0 == mFramesReflowed) && (mOldChildCount == mLine->mChildCount)) {
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mLineHeight = mLine->mBounds.height;
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return;
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}
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}
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nsIStyleContextPtr blockSC;
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@ -1600,12 +1667,14 @@ nsLineLayout::AlignChildren()
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// First vertically align the children on the line; this will
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// compute the actual line height for us.
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if (!mLine->mIsBlock) {
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mLineHeight =
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nsCSSLayout::VerticallyAlignChildren(mPresContext, mBlock, blockFont,
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mY,
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mLine->mFirstChild,
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mLine->mChildCount,
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mAscents, mState.mMaxAscent);
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}
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// Now horizontally place the children
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nsCSSLayout::HorizontallyPlaceChildren(mPresContext, mBlock,
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