// Get the available reflow space for the current y coordinate. The
// available space is relative to our coordinate system (0,0) is our
// upper left corner.
nsresult
nsBlockBandData::GetAvailableSpace(nscoord aY, PRBool aRelaxHeightConstraint,
nsRect& aResult)
{
// Get the raw band data for the given Y coordinate
nsresult rv = GetBandData(aY, aRelaxHeightConstraint);
if (NS_FAILED(rv)) { return rv; }
// Compute the bounding rect of the available space, i.e. space
// between any left and right floats.
ComputeAvailSpaceRect();
aResult = mAvailSpace;
#ifdef REALLY_NOISY_COMPUTEAVAILSPACERECT
printf("nsBBD %p GetAvailableSpace(%d) returing (%d, %d, %d, %d)\n",
this, aY, aResult.x, aResult.y, aResult.width, aResult.height);
#endif
return NS_OK;
}
// Test of getting the band data
PRBool MySpaceManager::TestGetBandData()
{
nsresult status;
nscoord yMost;
// Clear any existing regions
ClearRegions();
NS_ASSERTION(mBandList.IsEmpty(), "clear regions failed");
// Make sure YMost() returns the correct result
if (NS_ERROR_ABORT != YMost(yMost)) {
printf("TestGetBandData: YMost() returned wrong result (#1)\n");
return PR_FALSE;
}
// Make a band with three rects
status = AddRectRegion((nsIFrame*)0x01, nsRect(100, 100, 100, 100));
NS_ASSERTION(NS_SUCCEEDED(status), "unexpected status");
status = AddRectRegion((nsIFrame*)0x02, nsRect(300, 100, 100, 100));
NS_ASSERTION(NS_SUCCEEDED(status), "unexpected status");
status = AddRectRegion((nsIFrame*)0x03, nsRect(500, 100, 100, 100));
NS_ASSERTION(NS_SUCCEEDED(status), "unexpected status");
// Verify that YMost() is correct
if ((NS_OK != YMost(yMost)) || (yMost != 200)) {
printf("TestGetBandData: YMost() returned wrong value (#2)\n");
return PR_FALSE;
}
// Get the band data using a very large clip rect and a band data struct
// that's large enough
nsBandData bandData;
nsBandTrapezoid trapezoids[16];
bandData.mSize = 16;
bandData.mTrapezoids = trapezoids;
status = GetBandData(100, nsSize(10000,10000), bandData);
NS_ASSERTION(NS_SUCCEEDED(status), "unexpected status");
// Verify that there are seven trapezoids
if (bandData.mCount != 7) {
printf("TestGetBandData: wrong trapezoid count (#3)\n");
return PR_FALSE;
}
// Get the band data using a very large clip rect and a band data struct
// that's too small
bandData.mSize = 3;
status = GetBandData(100, nsSize(10000,10000), bandData);
if (NS_SUCCEEDED(status)) {
printf("TestGetBandData: ignored band data count (#4)\n");
return PR_FALSE;
}
// Make sure the count has been updated to reflect the number of trapezoids
// required
if (bandData.mCount <= bandData.mSize) {
printf("TestGetBandData: bad band data count (#5)\n");
return PR_FALSE;
}
// XXX We need lots more tests here...
return PR_TRUE;
}
