Added methods for get floater info in the band and a method to compute the impact on the max-element-size of the floaters
This commit is contained in:
kipp%netscape.com
Родитель
c51e319f15
Коммит
296dd55975
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@ -104,13 +104,17 @@ void
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nsBlockBandData::ComputeAvailSpaceRect()
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{
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nsBandTrapezoid* trapezoid = mData;
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nsBandTrapezoid* rightTrapezoid = nsnull;
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PRInt32 leftFloaters = 0;
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PRInt32 rightFloaters = 0;
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if (count > 1) {
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// If there's more than one trapezoid that means there are floaters
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PRInt32 i;
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// Stop when we get to space occupied by a right floater, or when we've
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// looked at every trapezoid and none are right floaters
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// Examine each trapezoid in the band, counting up the number of
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// left and right floaters. Use the right-most floater to
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// determine where the right edge of the available space is.
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for (i = 0; i < count; i++) {
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trapezoid = &mData[i];
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if (trapezoid->state != nsBandTrapezoid::Available) {
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@ -119,40 +123,65 @@ nsBlockBandData::ComputeAvailSpaceRect()
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PRInt32 j, numFrames = trapezoid->frames->Count();
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NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
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for (j = 0; j < numFrames; j++) {
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nsIFrame* f = (nsIFrame*)trapezoid->frames->ElementAt(j);
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nsIFrame* f = (nsIFrame*) trapezoid->frames->ElementAt(j);
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f->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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goto foundRightFloater;
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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leftFloaters++;
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}
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else if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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rightFloaters++;
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if ((nsnull == rightTrapezoid) && (i > 0)) {
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rightTrapezoid = &mData[i - 1];
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}
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}
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}
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} else {
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trapezoid->frame->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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break;
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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leftFloaters++;
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}
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else if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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rightFloaters++;
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if ((nsnull == rightTrapezoid) && (i > 0)) {
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rightTrapezoid = &mData[i - 1];
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}
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}
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}
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}
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}
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foundRightFloater:
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if (i > 0) {
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trapezoid = &mData[i - 1];
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}
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}
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mLeftFloaters = leftFloaters;
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mRightFloaters = rightFloaters;
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if (nsnull != rightTrapezoid) {
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trapezoid = rightTrapezoid;
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}
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trapezoid->GetRect(mAvailSpace);
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if (nsBandTrapezoid::Available == trapezoid->state) {
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// The trapezoid is available
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trapezoid->GetRect(mAvailSpace);
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} else {
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// When there is no available space, we still need a proper X
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// coordinate to place objects that end up here anyway.
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if (nsBandTrapezoid::Available != trapezoid->state) {
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const nsStyleDisplay* display;
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// The trapezoid is occupied. That means there's no available space
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trapezoid->GetRect(mAvailSpace);
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// XXX Better handle the case of multiple frames
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if (nsBandTrapezoid::Occupied == trapezoid->state) {
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if (nsBandTrapezoid::OccupiedMultiple == trapezoid->state) {
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// It's not clear what coordinate to use when there is no
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// available space and the space is multiply occupied...So: If
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// any of the floaters that are a part of the trapezoid are left
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// floaters then we move over to the right edge of the
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// unavaliable space.
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PRInt32 j, numFrames = trapezoid->frames->Count();
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NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
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for (j = 0; j < numFrames; j++) {
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nsIFrame* f = (nsIFrame*) trapezoid->frames->ElementAt(j);
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f->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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mAvailSpace.x = mAvailSpace.XMost();
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break;
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}
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}
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}
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else {
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trapezoid->frame->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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@ -233,6 +262,8 @@ nsBlockBandData::GetFrameYMost(nsIFrame* aFrame)
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return y + r.height;
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}
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// XXX optimization? use mLeftFloaters && mRightFloaters to avoid
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// doing anything
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nscoord
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nsBlockBandData::ClearFloaters(nscoord aY, PRUint8 aBreakType)
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{
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@ -278,3 +309,38 @@ nsBlockBandData::ClearFloaters(nscoord aY, PRUint8 aBreakType)
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}
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return aY;
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}
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void
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nsBlockBandData::GetMaxElementSize(nscoord* aWidthResult,
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nscoord* aHeightResult) const
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{
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nsRect r;
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nscoord maxWidth = 0;
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nscoord maxHeight = 0;
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for (PRInt32 i = 0; i < count; i++) {
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const nsBandTrapezoid* trap = &mData[i];
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if (trap->state != nsBandTrapezoid::Available) {
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// Get the width of the impacted area and update the maxWidth
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trap->GetRect(r);
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if (r.width > maxWidth) maxWidth = r.width;
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// Get the total height of the frame to compute the maxHeight,
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// not just the height that is part of this band.
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// XXX vertical margins!
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if (nsBandTrapezoid::OccupiedMultiple == trap->state) {
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PRInt32 j, numFrames = trap->frames->Count();
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NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
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for (j = 0; j < numFrames; j++) {
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nsIFrame* f = (nsIFrame*) trap->frames->ElementAt(j);
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f->GetRect(r);
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if (r.height > maxHeight) maxHeight = r.height;
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}
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} else {
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trap->frame->GetRect(r);
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if (r.height > maxHeight) maxHeight = r.height;
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}
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}
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}
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*aWidthResult = maxWidth;
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*aHeightResult = maxHeight;
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}
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@ -40,10 +40,40 @@ public:
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// Clear any current floaters, returning a new Y coordinate
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nscoord ClearFloaters(nscoord aY, PRUint8 aBreakType);
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nscoord GetTrapezoidCount() const {
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// Get the raw trapezoid count for this band.
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PRInt32 GetTrapezoidCount() const {
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return count;
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}
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// Get the number of floaters that are impacting the current
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// band. Note that this value is relative to the current translation
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// in the space manager which means that some floaters may be hidden
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// by the translation and therefore won't be in the count.
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PRInt32 GetFloaterCount() const {
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return mLeftFloaters + mRightFloaters;
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}
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// Get the number of left floaters that are impacting the current
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// band. Note that this value is relative to the current translation
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// in the space manager which means that some floaters may be hidden
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// by the translation and therefore won't be in the count.
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PRInt32 GetLeftFloaterCount() const {
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return mLeftFloaters;
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}
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// Get the number of right floaters that are impacting the current
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// band. Note that this value is relative to the current translation
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// in the space manager which means that some floaters may be hidden
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// by the translation and therefore won't be in the count.
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PRInt32 GetRightFloaterCount() const {
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return mRightFloaters;
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}
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// Return the impact on the max-element-size for this band by
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// computing the maximum width and maximum height of all the
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// floaters.
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void GetMaxElementSize(nscoord* aWidthResult, nscoord* aHeightResult) const;
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protected:
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// The spacemanager we are getting space from
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nsISpaceManager* mSpaceManager;
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@ -59,6 +89,12 @@ protected:
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// Bounding rect of available space between any left and right floaters
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nsRect mAvailSpace;
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// Number of left and right floaters in the current band. Note that
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// this number may be less than the total number of floaters present
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// in the band, if our translation in the space manager "hides" some
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// floaters.
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PRInt32 mLeftFloaters, mRightFloaters;
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void ComputeAvailSpaceRect();
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void GetAvailableSpace(nscoord aY);
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PRBool ShouldClearFrame(nsIFrame* aFrame, PRUint8 aBreakType);
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@ -104,13 +104,17 @@ void
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nsBlockBandData::ComputeAvailSpaceRect()
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{
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nsBandTrapezoid* trapezoid = mData;
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nsBandTrapezoid* rightTrapezoid = nsnull;
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PRInt32 leftFloaters = 0;
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PRInt32 rightFloaters = 0;
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if (count > 1) {
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// If there's more than one trapezoid that means there are floaters
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PRInt32 i;
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// Stop when we get to space occupied by a right floater, or when we've
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// looked at every trapezoid and none are right floaters
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// Examine each trapezoid in the band, counting up the number of
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// left and right floaters. Use the right-most floater to
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// determine where the right edge of the available space is.
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for (i = 0; i < count; i++) {
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trapezoid = &mData[i];
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if (trapezoid->state != nsBandTrapezoid::Available) {
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@ -119,40 +123,65 @@ nsBlockBandData::ComputeAvailSpaceRect()
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PRInt32 j, numFrames = trapezoid->frames->Count();
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NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
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for (j = 0; j < numFrames; j++) {
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nsIFrame* f = (nsIFrame*)trapezoid->frames->ElementAt(j);
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nsIFrame* f = (nsIFrame*) trapezoid->frames->ElementAt(j);
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f->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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goto foundRightFloater;
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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leftFloaters++;
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}
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else if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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rightFloaters++;
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if ((nsnull == rightTrapezoid) && (i > 0)) {
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rightTrapezoid = &mData[i - 1];
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}
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}
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}
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} else {
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trapezoid->frame->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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break;
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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leftFloaters++;
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}
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else if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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rightFloaters++;
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if ((nsnull == rightTrapezoid) && (i > 0)) {
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rightTrapezoid = &mData[i - 1];
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}
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}
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}
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}
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}
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foundRightFloater:
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if (i > 0) {
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trapezoid = &mData[i - 1];
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}
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}
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mLeftFloaters = leftFloaters;
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mRightFloaters = rightFloaters;
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if (nsnull != rightTrapezoid) {
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trapezoid = rightTrapezoid;
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}
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trapezoid->GetRect(mAvailSpace);
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if (nsBandTrapezoid::Available == trapezoid->state) {
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// The trapezoid is available
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trapezoid->GetRect(mAvailSpace);
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} else {
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// When there is no available space, we still need a proper X
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// coordinate to place objects that end up here anyway.
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if (nsBandTrapezoid::Available != trapezoid->state) {
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const nsStyleDisplay* display;
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// The trapezoid is occupied. That means there's no available space
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trapezoid->GetRect(mAvailSpace);
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// XXX Better handle the case of multiple frames
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if (nsBandTrapezoid::Occupied == trapezoid->state) {
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if (nsBandTrapezoid::OccupiedMultiple == trapezoid->state) {
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// It's not clear what coordinate to use when there is no
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// available space and the space is multiply occupied...So: If
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// any of the floaters that are a part of the trapezoid are left
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// floaters then we move over to the right edge of the
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// unavaliable space.
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PRInt32 j, numFrames = trapezoid->frames->Count();
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NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
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for (j = 0; j < numFrames; j++) {
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nsIFrame* f = (nsIFrame*) trapezoid->frames->ElementAt(j);
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f->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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mAvailSpace.x = mAvailSpace.XMost();
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break;
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}
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}
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}
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else {
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trapezoid->frame->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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@ -233,6 +262,8 @@ nsBlockBandData::GetFrameYMost(nsIFrame* aFrame)
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return y + r.height;
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}
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// XXX optimization? use mLeftFloaters && mRightFloaters to avoid
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// doing anything
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nscoord
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nsBlockBandData::ClearFloaters(nscoord aY, PRUint8 aBreakType)
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{
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@ -278,3 +309,38 @@ nsBlockBandData::ClearFloaters(nscoord aY, PRUint8 aBreakType)
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}
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return aY;
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}
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void
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nsBlockBandData::GetMaxElementSize(nscoord* aWidthResult,
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nscoord* aHeightResult) const
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{
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nsRect r;
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nscoord maxWidth = 0;
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nscoord maxHeight = 0;
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for (PRInt32 i = 0; i < count; i++) {
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const nsBandTrapezoid* trap = &mData[i];
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if (trap->state != nsBandTrapezoid::Available) {
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// Get the width of the impacted area and update the maxWidth
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trap->GetRect(r);
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if (r.width > maxWidth) maxWidth = r.width;
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// Get the total height of the frame to compute the maxHeight,
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// not just the height that is part of this band.
|
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// XXX vertical margins!
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if (nsBandTrapezoid::OccupiedMultiple == trap->state) {
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PRInt32 j, numFrames = trap->frames->Count();
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NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
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for (j = 0; j < numFrames; j++) {
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nsIFrame* f = (nsIFrame*) trap->frames->ElementAt(j);
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f->GetRect(r);
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if (r.height > maxHeight) maxHeight = r.height;
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}
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} else {
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trap->frame->GetRect(r);
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if (r.height > maxHeight) maxHeight = r.height;
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}
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}
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}
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*aWidthResult = maxWidth;
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*aHeightResult = maxHeight;
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}
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|
|
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@ -40,10 +40,40 @@ public:
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// Clear any current floaters, returning a new Y coordinate
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nscoord ClearFloaters(nscoord aY, PRUint8 aBreakType);
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nscoord GetTrapezoidCount() const {
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// Get the raw trapezoid count for this band.
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PRInt32 GetTrapezoidCount() const {
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return count;
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}
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// Get the number of floaters that are impacting the current
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// band. Note that this value is relative to the current translation
|
||||
// in the space manager which means that some floaters may be hidden
|
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// by the translation and therefore won't be in the count.
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PRInt32 GetFloaterCount() const {
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return mLeftFloaters + mRightFloaters;
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}
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// Get the number of left floaters that are impacting the current
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// band. Note that this value is relative to the current translation
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// in the space manager which means that some floaters may be hidden
|
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// by the translation and therefore won't be in the count.
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PRInt32 GetLeftFloaterCount() const {
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return mLeftFloaters;
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}
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// Get the number of right floaters that are impacting the current
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// band. Note that this value is relative to the current translation
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// in the space manager which means that some floaters may be hidden
|
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// by the translation and therefore won't be in the count.
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PRInt32 GetRightFloaterCount() const {
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return mRightFloaters;
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}
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// Return the impact on the max-element-size for this band by
|
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// computing the maximum width and maximum height of all the
|
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// floaters.
|
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void GetMaxElementSize(nscoord* aWidthResult, nscoord* aHeightResult) const;
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|
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protected:
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// The spacemanager we are getting space from
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nsISpaceManager* mSpaceManager;
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|
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@ -59,6 +89,12 @@ protected:
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// Bounding rect of available space between any left and right floaters
|
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nsRect mAvailSpace;
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||||
|
||||
// Number of left and right floaters in the current band. Note that
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// this number may be less than the total number of floaters present
|
||||
// in the band, if our translation in the space manager "hides" some
|
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// floaters.
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PRInt32 mLeftFloaters, mRightFloaters;
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void ComputeAvailSpaceRect();
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void GetAvailableSpace(nscoord aY);
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PRBool ShouldClearFrame(nsIFrame* aFrame, PRUint8 aBreakType);
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|
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