/* virtual */ nsresult
nsMathMLmpaddedFrame::MeasureForWidth(nsRenderingContext& aRenderingContext,
nsHTMLReflowMetrics& aDesiredSize)
{
ProcessAttributes();
return Place(aRenderingContext, false, aDesiredSize);
}
NS_IMETHODIMP
nsMathMLmspaceFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
ProcessAttributes(aPresContext);
mBoundingMetrics.Clear();
mBoundingMetrics.width = mWidth;
mBoundingMetrics.ascent = mHeight;
mBoundingMetrics.descent = mDepth;
aDesiredSize.ascent = mHeight;
aDesiredSize.descent = mDepth;
aDesiredSize.width = mWidth;
aDesiredSize.height = aDesiredSize.ascent + aDesiredSize.descent;
if (aDesiredSize.mComputeMEW) {
aDesiredSize.mMaxElementWidth = aDesiredSize.width;
}
// Also return our bounding metrics
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
/* virtual */ nsresult
nsMathMLmpaddedFrame::MeasureForWidth(DrawTarget* aDrawTarget,
ReflowOutput& aDesiredSize)
{
ProcessAttributes();
return Place(aDrawTarget, false, aDesiredSize);
}
void
nsMathMLmspaceFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
MarkInReflow();
mPresentationData.flags &= ~NS_MATHML_ERROR;
ProcessAttributes(aPresContext);
mBoundingMetrics = nsBoundingMetrics();
mBoundingMetrics.width = mWidth;
mBoundingMetrics.ascent = mHeight;
mBoundingMetrics.descent = mDepth;
mBoundingMetrics.leftBearing = 0;
mBoundingMetrics.rightBearing = mBoundingMetrics.width;
aDesiredSize.SetBlockStartAscent(mHeight);
aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
aDesiredSize.Height() = aDesiredSize.BlockStartAscent() + mDepth;
// Also return our bounding metrics
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
}
/* virtual */ nsresult
nsMathMLmspaceFrame::MeasureForWidth(nsRenderingContext& aRenderingContext,
nsHTMLReflowMetrics& aDesiredSize)
{
ProcessAttributes(PresContext());
mBoundingMetrics = nsBoundingMetrics();
mBoundingMetrics.width = mWidth;
aDesiredSize.Width() = std::max(0, mBoundingMetrics.width);
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
return NS_OK;
}
void
nsMathMLmpaddedFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
ProcessAttributes();
///////////////
// Let the base class format our content like an inferred mrow
nsMathMLContainerFrame::Reflow(aPresContext, aDesiredSize,
aReflowState, aStatus);
//NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "bad status");
}
void
nsMathMLmpaddedFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus)
{
mPresentationData.flags &= ~NS_MATHML_ERROR;
ProcessAttributes();
///////////////
// Let the base class format our content like an inferred mrow
nsMathMLContainerFrame::Reflow(aPresContext, aDesiredSize,
aReflowInput, aStatus);
//NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "bad status");
}
/* virtual */ nsresult
nsMathMLmmultiscriptsFrame::Place(nsRenderingContext& aRenderingContext,
bool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize)
{
////////////////////////////////////
// Get the children's desired sizes
nscoord minShiftFromXHeight, subDrop, supDrop;
////////////////////////////////////////
// Initialize super/sub shifts that
// depend only on the current font
////////////////////////////////////////
ProcessAttributes();
// get x-height (an ex)
const nsStyleFont* font = GetStyleFont();
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
aRenderingContext.SetFont(fm);
nscoord xHeight = fm->XHeight();
nscoord ruleSize;
GetRuleThickness (aRenderingContext, fm, ruleSize);
// scriptspace from TeX for extra spacing after sup/subscript (0.5pt in plain TeX)
// forced to be at least 1 pixel here
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
nscoord scriptSpace = NS_MAX(nsPresContext::CSSPointsToAppUnits(0.5f), onePixel);
/////////////////////////////////////
// first the shift for the subscript
// subScriptShift{1,2}
// = minimum amount to shift the subscript down
// = sub{1,2} in TeXbook
// subScriptShift1 = subscriptshift attribute * x-height
nscoord subScriptShift1, subScriptShift2;
// Get subScriptShift{1,2} default from font
GetSubScriptShifts (fm, subScriptShift1, subScriptShift2);
if (0 < mSubScriptShift) {
// the user has set the subscriptshift attribute
float scaler = ((float) subScriptShift2) / subScriptShift1;
subScriptShift1 = NS_MAX(subScriptShift1, mSubScriptShift);
subScriptShift2 = NSToCoordRound(scaler * subScriptShift1);
}
// the font dependent shift
nscoord subScriptShift = NS_MAX(subScriptShift1,subScriptShift2);
/////////////////////////////////////
// next the shift for the superscript
// supScriptShift{1,2,3}
// = minimum amount to shift the supscript up
// = sup{1,2,3} in TeX
// supScriptShift1 = superscriptshift attribute * x-height
// Note that there are THREE values for supscript shifts depending
// on the current style
nscoord supScriptShift1, supScriptShift2, supScriptShift3;
// Set supScriptShift{1,2,3} default from font
GetSupScriptShifts (fm, supScriptShift1, supScriptShift2, supScriptShift3);
if (0 < mSupScriptShift) {
// the user has set the superscriptshift attribute
float scaler2 = ((float) supScriptShift2) / supScriptShift1;
float scaler3 = ((float) supScriptShift3) / supScriptShift1;
supScriptShift1 = NS_MAX(supScriptShift1, mSupScriptShift);
supScriptShift2 = NSToCoordRound(scaler2 * supScriptShift1);
supScriptShift3 = NSToCoordRound(scaler3 * supScriptShift1);
}
// get sup script shift depending on current script level and display style
// Rule 18c, App. G, TeXbook
nscoord supScriptShift;
if ( font->mScriptLevel == 0 &&
NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags) &&
!NS_MATHML_IS_COMPRESSED(mPresentationData.flags)) {
// Style D in TeXbook
supScriptShift = supScriptShift1;
}
else if (NS_MATHML_IS_COMPRESSED(mPresentationData.flags)) {
// Style C' in TeXbook = D',T',S',SS'
supScriptShift = supScriptShift3;
}
else {
// everything else = T,S,SS
supScriptShift = supScriptShift2;
}
////////////////////////////////////
// Get the children's sizes
////////////////////////////////////
nscoord width = 0, prescriptsWidth = 0, rightBearing = 0;
nsIFrame* mprescriptsFrame = nsnull; // frame of <mprescripts/>, if there.
bool isSubScript = false;
nscoord minSubScriptShift = 0, minSupScriptShift = 0;
nscoord trySubScriptShift = subScriptShift;
nscoord trySupScriptShift = supScriptShift;
nscoord maxSubScriptShift = subScriptShift;
nscoord maxSupScriptShift = supScriptShift;
PRInt32 count = 0;
nsHTMLReflowMetrics baseSize;
nsHTMLReflowMetrics subScriptSize;
nsHTMLReflowMetrics supScriptSize;
nsIFrame* baseFrame = nsnull;
nsIFrame* subScriptFrame = nsnull;
nsIFrame* supScriptFrame = nsnull;
bool firstPrescriptsPair = false;
nsBoundingMetrics bmBase, bmSubScript, bmSupScript;
nscoord italicCorrection = 0;
mBoundingMetrics.width = 0;
mBoundingMetrics.ascent = mBoundingMetrics.descent = -0x7FFFFFFF;
nscoord ascent = -0x7FFFFFFF, descent = -0x7FFFFFFF;
aDesiredSize.width = aDesiredSize.height = 0;
nsIFrame* childFrame = mFrames.FirstChild();
while (childFrame) {
if (childFrame->GetContent()->Tag() == nsGkAtoms::mprescripts_) {
if (mprescriptsFrame) {
// duplicate <mprescripts/> found
// report an error, encourage people to get their markups in order
return ReflowError(aRenderingContext, aDesiredSize);
}
mprescriptsFrame = childFrame;
firstPrescriptsPair = true;
}
else {
if (0 == count) {
// base
baseFrame = childFrame;
GetReflowAndBoundingMetricsFor(baseFrame, baseSize, bmBase);
GetItalicCorrection(bmBase, italicCorrection);
// for the superscript, we always add "a little to spare"
italicCorrection += onePixel;
// we update mBoundingMetrics.{ascent,descent} with that
// of the baseFrame only after processing all the sup/sub pairs
// XXX need italic correction only *if* there are postscripts ?
mBoundingMetrics.width = bmBase.width + italicCorrection;
mBoundingMetrics.rightBearing = bmBase.rightBearing;
mBoundingMetrics.leftBearing = bmBase.leftBearing; // until overwritten
}
else {
// super/subscript block
if (isSubScript) {
// subscript
subScriptFrame = childFrame;
GetReflowAndBoundingMetricsFor(subScriptFrame, subScriptSize, bmSubScript);
// get the subdrop from the subscript font
GetSubDropFromChild (subScriptFrame, subDrop);
// parameter v, Rule 18a, App. G, TeXbook
minSubScriptShift = bmBase.descent + subDrop;
trySubScriptShift = NS_MAX(minSubScriptShift,subScriptShift);
mBoundingMetrics.descent =
NS_MAX(mBoundingMetrics.descent,bmSubScript.descent);
descent = NS_MAX(descent,subScriptSize.height - subScriptSize.ascent);
width = bmSubScript.width + scriptSpace;
rightBearing = bmSubScript.rightBearing;
}
else {
// supscript
supScriptFrame = childFrame;
GetReflowAndBoundingMetricsFor(supScriptFrame, supScriptSize, bmSupScript);
// get the supdrop from the supscript font
GetSupDropFromChild (supScriptFrame, supDrop);
// parameter u, Rule 18a, App. G, TeXbook
minSupScriptShift = bmBase.ascent - supDrop;
// get min supscript shift limit from x-height
// = d(x) + 1/4 * sigma_5, Rule 18c, App. G, TeXbook
minShiftFromXHeight = NSToCoordRound
((bmSupScript.descent + (1.0f/4.0f) * xHeight));
trySupScriptShift =
NS_MAX(minSupScriptShift,NS_MAX(minShiftFromXHeight,supScriptShift));
mBoundingMetrics.ascent =
NS_MAX(mBoundingMetrics.ascent,bmSupScript.ascent);
ascent = NS_MAX(ascent,supScriptSize.ascent);
width = NS_MAX(width, bmSupScript.width + scriptSpace);
rightBearing = NS_MAX(rightBearing, bmSupScript.rightBearing);
if (!mprescriptsFrame) { // we are still looping over base & postscripts
mBoundingMetrics.rightBearing = mBoundingMetrics.width + rightBearing;
mBoundingMetrics.width += width;
}
else {
prescriptsWidth += width;
if (firstPrescriptsPair) {
firstPrescriptsPair = false;
mBoundingMetrics.leftBearing =
NS_MIN(bmSubScript.leftBearing, bmSupScript.leftBearing);
}
}
width = rightBearing = 0;
// negotiate between the various shifts so that
// there is enough gap between the sup and subscripts
// Rule 18e, App. G, TeXbook
nscoord gap =
(trySupScriptShift - bmSupScript.descent) -
(bmSubScript.ascent - trySubScriptShift);
if (gap < 4.0f * ruleSize) {
// adjust trySubScriptShift to get a gap of (4.0 * ruleSize)
trySubScriptShift += NSToCoordRound ((4.0f * ruleSize) - gap);
}
// next we want to ensure that the bottom of the superscript
// will be > (4/5) * x-height above baseline
gap = NSToCoordRound ((4.0f/5.0f) * xHeight -
(trySupScriptShift - bmSupScript.descent));
if (gap > 0.0f) {
trySupScriptShift += gap;
trySubScriptShift -= gap;
}
maxSubScriptShift = NS_MAX(maxSubScriptShift, trySubScriptShift);
maxSupScriptShift = NS_MAX(maxSupScriptShift, trySupScriptShift);
trySubScriptShift = subScriptShift;
trySupScriptShift = supScriptShift;
}
}
isSubScript = !isSubScript;
}
count++;
childFrame = childFrame->GetNextSibling();
}
// note: width=0 if all sup-sub pairs match correctly
if ((0 != width) || !baseFrame || !subScriptFrame || !supScriptFrame) {
// report an error, encourage people to get their markups in order
return ReflowError(aRenderingContext, aDesiredSize);
}
// we left out the width of prescripts, so ...
mBoundingMetrics.rightBearing += prescriptsWidth;
mBoundingMetrics.width += prescriptsWidth;
// we left out the base during our bounding box updates, so ...
mBoundingMetrics.ascent =
NS_MAX(mBoundingMetrics.ascent+maxSupScriptShift,bmBase.ascent);
mBoundingMetrics.descent =
NS_MAX(mBoundingMetrics.descent+maxSubScriptShift,bmBase.descent);
// get the reflow metrics ...
aDesiredSize.ascent =
NS_MAX(ascent+maxSupScriptShift,baseSize.ascent);
aDesiredSize.height = aDesiredSize.ascent +
NS_MAX(descent+maxSubScriptShift,baseSize.height - baseSize.ascent);
aDesiredSize.width = mBoundingMetrics.width;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
//////////////////
// Place Children
// Place prescripts, followed by base, and then postscripts.
// The list of frames is in the order: {base} {postscripts} {prescripts}
// We go over the list in a circular manner, starting at <prescripts/>
if (aPlaceOrigin) {
nscoord dx = 0, dy = 0;
count = 0;
childFrame = mprescriptsFrame;
do {
if (!childFrame) { // end of prescripts,
// place the base ...
childFrame = baseFrame;
dy = aDesiredSize.ascent - baseSize.ascent;
FinishReflowChild (baseFrame, PresContext(), nsnull, baseSize,
MirrorIfRTL(aDesiredSize.width,
baseSize.width,
dx),
dy, 0);
dx += bmBase.width + italicCorrection;
}
else if (mprescriptsFrame != childFrame) {
// process each sup/sub pair
if (0 == count) {
subScriptFrame = childFrame;
count = 1;
}
else if (1 == count) {
supScriptFrame = childFrame;
count = 0;
// get the ascent/descent of sup/subscripts stored in their rects
// rect.x = descent, rect.y = ascent
GetReflowAndBoundingMetricsFor(subScriptFrame, subScriptSize, bmSubScript);
GetReflowAndBoundingMetricsFor(supScriptFrame, supScriptSize, bmSupScript);
// center w.r.t. largest width
width = NS_MAX(subScriptSize.width, supScriptSize.width);
dy = aDesiredSize.ascent - subScriptSize.ascent +
maxSubScriptShift;
FinishReflowChild (subScriptFrame, PresContext(), nsnull,
subScriptSize,
MirrorIfRTL(aDesiredSize.width,
subScriptSize.width,
dx + (width-subScriptSize.width)/2),
dy, 0);
dy = aDesiredSize.ascent - supScriptSize.ascent -
maxSupScriptShift;
FinishReflowChild (supScriptFrame, PresContext(), nsnull,
supScriptSize,
MirrorIfRTL(aDesiredSize.width,
supScriptSize.width,
dx + (width-supScriptSize.width)/2),
dy, 0);
dx += width + scriptSpace;
}
}
childFrame = childFrame->GetNextSibling();
} while (mprescriptsFrame != childFrame);
}
return NS_OK;
}
void CXMLparser::ProcessNode (CXMLelement & parent)
{
CString strName;
CString strValue;
CString strPrefix;
UINT iNodeStart = m_xmlPos;
UINT iFirstLine = m_xmlLine;
while (m_xmlBuff [m_xmlPos])
{
// bypass spaces and comments
SkipComments (true);
// nothing left? all done
if (m_xmlBuff [m_xmlPos] == 0)
break;
// look for element start
if (m_xmlBuff [m_xmlPos] != '<')
{
// not element - must be content
// can't have content at root level
if (parent.strName.IsEmpty ())
ThrowErrorException ("Expected '<', got \"%c\" (content not permitted here)",
m_xmlBuff [m_xmlPos]);
if (m_xmlBuff [m_xmlPos] == '\n')
m_xmlLine++; // count lines
// <![CDATA[ terminator invalid here (ie. ]]> )
if (m_xmlBuff [m_xmlPos] == ']' &&
m_xmlBuff [m_xmlPos + 1] == ']' &&
m_xmlBuff [m_xmlPos + 2] == '>')
ThrowErrorException ("CDATA terminator ']]>' invalid");
// don't let them slip in non-printables
if ((unsigned char) m_xmlBuff [m_xmlPos] < ' ' &&
(unsigned char) m_xmlBuff [m_xmlPos] != '\n' &&
(unsigned char) m_xmlBuff [m_xmlPos] != '\r')
ThrowErrorException ("Non-printable character, code %i, not permitted",
(int) m_xmlBuff [m_xmlPos]);
m_xmlPos++; // skip character
continue; // keep processing content
}
m_xmlPos++; // skip <
// special cases: <?xml blah?> <!doctype blah> </end-of-something>
if (m_xmlBuff [m_xmlPos] == '!' ||
m_xmlBuff [m_xmlPos] == '?' ||
m_xmlBuff [m_xmlPos] == '/')
{
strPrefix = m_xmlBuff [m_xmlPos];
m_xmlPos++; // bypass special types
}
else
strPrefix.Empty ();
// special and bizarre case of <![CDATA[ ... ]]>
if (strPrefix == '!' &&
m_xmlBuff [m_xmlPos] == '[' &&
m_xmlBuff [m_xmlPos + 1] == 'C' &&
m_xmlBuff [m_xmlPos + 2] == 'D' &&
m_xmlBuff [m_xmlPos + 3] == 'A' &&
m_xmlBuff [m_xmlPos + 4] == 'T' &&
m_xmlBuff [m_xmlPos + 5] == 'A' &&
m_xmlBuff [m_xmlPos + 6] == '[')
{
// can't have content at root level
if (parent.strName.IsEmpty ())
ThrowErrorException ("<![CDATA[ invalid at root level");
m_xmlPos += 7; // skip [CDATA[
while (m_xmlBuff [m_xmlPos] != ']' ||
m_xmlBuff [m_xmlPos + 1] != ']' ||
m_xmlBuff [m_xmlPos + 2] != '>')
{
// shouldn't have end-of-file before the ]]>
if (m_xmlBuff [m_xmlPos] == 0)
ThrowErrorException ("Unexpected end-of-file inside [CDATA[ definition");
// don't let them slip in non-printables
if ((unsigned char) m_xmlBuff [m_xmlPos] < ' ' &&
(unsigned char) m_xmlBuff [m_xmlPos] != '\n' &&
(unsigned char) m_xmlBuff [m_xmlPos] != '\r')
ThrowErrorException ("Non-printable character, code %i, not permitted",
(int) m_xmlBuff [m_xmlPos]);
if (m_xmlBuff [m_xmlPos] == '\n')
m_xmlLine++; // count lines
m_xmlPos++; // try next character
}
m_xmlPos += 3; // skip ]]>
continue; // back to start of loop
} // end of <![CDATA[ section
int iLine = m_xmlLine; // line where we expect to see name
strName = GetName ("Element");
// check for sequence </blah xxx>
if (strPrefix == '/' && m_xmlBuff [m_xmlPos] != '>')
if (m_xmlBuff [m_xmlPos] == 0)
ThrowErrorException ("Unexpected end-of-file after '</%s'",
(LPCTSTR) strName);
else
ThrowErrorException ("Surplus characters after '</%s'",
(LPCTSTR) strName);
// check for sequence </blah>
if (strPrefix == '/')
{
if (strName != parent.strName)
if (parent.strName.IsEmpty ()) // can't go up a level here :)
ThrowErrorException ("Unexpected closing tag </%s> - "
"no corresponding opening tag",
(LPCTSTR) strName);
else
ThrowErrorException ("Elements terminated out of sequence, "
"expected </%s>, got </%s>",
(LPCTSTR) parent.strName,
(LPCTSTR) strName);
AssembleContent (parent, iFirstLine, iNodeStart);
m_xmlPos++; // skip terminating >
return; // terminated this node
}
if (strPrefix == '!')
ProcessDeclaration (strName); // process declaration, eg. <!DOCTYPE
else
{ // not a declaration, must be an ordinary element
// time to create a new element
CXMLelement * pElement = new CXMLelement;
if (!pElement)
ThrowErrorException ("Could not allocate memory for XML parsing of element %s",
(LPCTSTR) strName);
// remember its name
pElement->strName = strPrefix + strName;
pElement->iLine = iLine;
parent.ChildrenList.AddTail (pElement); // add to parent's list of children
// OK, we have a new sibling for our parent, let's see if it has any attributes ...
ProcessAttributes (*pElement); // process its attributes
// hmm - we have now got something like <blah> ...
// drop down to find children for it - unless 'empty' element
if (!pElement->bEmpty)
ProcessNode (*pElement);
} // end of non-declaration
} // end of processing buffer
if (!parent.strName.IsEmpty ())
ThrowErrorException ("Unexpected end-of-file while looking for </%s>",
(LPCTSTR) parent.strName);
} // end of CXMLparser::ProcessNode
OsisData::OsisData(const QMetaObject& _mo, QDomElement& categoryElement, QString& elementName)
: mo(_mo)
, ElementName(elementName)
{
ProcessAttributes(categoryElement);
}
