/// ------------------------------------------------------------------------------------
/// <summary>
/// Get the start and end reference of the specified position <paramref name="ivPos"/>
/// in the paragraph. Section reference could be used, if available, to fill in missing
/// information, but (at least for now) we will not search back into previous sections.
/// </summary>
/// <param name="wsBT">HVO of the writing system of the BT to search, or -1 to search
/// the vernacular.</param>
/// <param name="ivPos">Character offset in the paragraph.</param>
/// <param name="fAssocPrev">Consider this position to be associated with any preceding
/// text in the paragraph (in the case where ichPos is at a chapter boundary).</param>
/// <param name="refStart">[out] Start reference</param>
/// <param name="refEnd">[out] End reference</param>
/// <remarks><p><paramref name="refStart"/> and <paramref name="refEnd"/> are only
/// different if we have bridged verse numbers.</p>
/// <p>May return incomplete or invalid reference if, for example, the section
/// object does not have a valid start reference.</p>
/// <p>If ivPos LT zero, we will not search this para, but look only in previous
/// paragraphs</p></remarks>
/// ------------------------------------------------------------------------------------
public void GetBCVRefAtPosition(int wsBT, int ivPos, bool fAssocPrev,
out BCVRef refStart, out BCVRef refEnd)
{
refStart = new BCVRef();
refEnd = new BCVRef();
// Might be trying to get the BCVRef in a footnote
int ownerOwnFlid = m_cache.GetOwningFlidOfObject(OwnerHVO);
if (ownerOwnFlid == (int)ScrBook.ScrBookTags.kflidFootnotes)
{
ScrFootnote footnote = new ScrFootnote(m_cache, OwnerHVO);
refStart = footnote.StartRef;
refEnd = footnote.StartRef;
return;
}
BCVRef refStartT = new BCVRef();
BCVRef refEndT = new BCVRef();
ChapterVerseFound found = ChapterVerseFound.None;
bool fGotVerse = false;
ScrTxtPara para = this; // curent paragraph being examined for reference
int chvoParas = 0; // count of paragraphs in the section
int ihvoPara = 0; // index of the paragraph within the section
BCVRef sectRefStart;
BCVRef sectRefEnd;
GetSectionStartAndEndRefs(out sectRefStart, out sectRefEnd);
while (true)
{
if (para == this)
{
found = para.GetBCVRefAtPosWithinPara(wsBT, ivPos, fAssocPrev, out refStartT,
out refEndT);
}
else
{
found = para.GetBCVRefAtEndOfPara(out refStartT, out refEndT);
}
// if we found a verse, remember it
if (!fGotVerse && ((found & ChapterVerseFound.Verse) != 0))
{
refStart.Verse = refStartT.Verse;
refEnd.Verse = refEndT.Verse;
fGotVerse = true;
}
// if we found a chapter, process it
if ((found & ChapterVerseFound.Chapter) != 0)
{
if (sectRefStart != null && !sectRefStart.IsEmpty)
{
refStart.Book = refEnd.Book = sectRefStart.Book; //may not exist
}
refStart.Chapter = refEnd.Chapter = refStartT.Chapter;
// GetBCVwithinPara always returns a verse if it finds a chapter number
// so we have already built the full reference
Debug.Assert(fGotVerse);
return;
}
// We got to the beginning of the paragraph being edited and still haven't
// found a decent reference for our edited text, so keep looking back to
// get it from a previous paragraph.
// First time thru, figure out which paragraph we are in
if (chvoParas == 0)
{
// REVIEW (EberhardB): does this work if not all paragraphs are
// loaded in the cache?
chvoParas = m_cache.GetVectorSize(OwnerHVO,
(int)StText.StTextTags.kflidParagraphs);
// Go forward through vector of paragraphs to find the one being parsed
for (ihvoPara = 0; ihvoPara < chvoParas; ihvoPara++)
{
int hvoPara = m_cache.GetVectorItem(OwnerHVO,
(int)StText.StTextTags.kflidParagraphs, ihvoPara);
if (hvoPara == Hvo)
{
break; // found our current para
}
}
}
// Move to the previous paragraph
ihvoPara--;
if (ihvoPara < 0)
{
// We are at the beginning of the section. We can't look back any further.
// ENHANCE TomB: If we search all the way through to the beginning of the
// section and never get a valid reference, this section begins in the
// middle of a verse or chapter (unlikely in the case of a verse, but
// quite likely in the case of a chapter). OR (most likely) this edit
// happened at the very beginning of the section, and when we start
// parsing, the first thing we'll get is a decent reference.
// REVIEW: we're using the section reference, but since they don't get
// updated, a change (like removing a chapter) in a previous section
// could mess up this section.
if (fGotVerse)
{
// Use the verse we got previously (already set), along with the
// first chapter for the section and the book, if available.
if (sectRefStart != 0)
{
refStart.Chapter = refEnd.Chapter = sectRefStart.Chapter;
refStart.Book = refEnd.Book = sectRefStart.Book;
}
}
else
{
// REVIEW:
// For now, we're just using the first verse for the section, but this
// could be wrong if the section begins in the middle of a verse bridge
// or misleading if the section just doesn't yet have verse numbers
// marked.
if (sectRefStart != 0)
{
refStart = new BCVRef(sectRefStart);
refEnd = new BCVRef(sectRefStart);
}
// If we are looking for a negative position in the first para of a section
// the needed result is not precisely defined yet,
// but this is where you could set it
// if (para == this && ivPos < 0)
// refStart.Verse = refEnd.Verse = ????;
}
return;
}
// Set up for the previous paragraph in this section, and we'll try again
int hvoNewPara = m_cache.GetVectorItem(OwnerHVO,
(int)StText.StTextTags.kflidParagraphs, ihvoPara);
// use a special constructor since we already know the section refs
para = new ScrTxtPara(m_cache, hvoNewPara, false, false);
}
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Find the start and end reference, by searching backwards in the given ITsString
/// from the given position.
/// </summary>
/// <param name="tss">the given ITsString</param>
/// <param name="ichPos">Index of character in paragraph whose reference we want</param>
/// <param name="fAssocPrev">Consider this position to be associated with any preceding
/// text in the paragraph (in the case where ichPos is at a chapter boundary).</param>
/// <param name="refStart">[out] Start reference for the paragraph.</param>
/// <param name="refEnd">[out] End reference for the paragraph.</param>
/// <returns>A value of <see cref="ChapterVerseFound"/> that tells if a chapter and/or
/// verse number was found in this paragraph.</returns>
/// <remarks>If ichPos LT zero, we will not search this para, and simply return.
/// Be careful not to use this method to search the contents of paragraph using
/// character offsets from the BT!
/// </remarks>
/// ------------------------------------------------------------------------------------
static public ChapterVerseFound GetBCVRefAtPosWithinTss(ITsString tss, int ichPos,
bool fAssocPrev, out BCVRef refStart, out BCVRef refEnd)
{
refStart = new BCVRef();
refEnd = new BCVRef();
ChapterVerseFound retVal = ChapterVerseFound.None;
if (tss.Length <= 0)
{
return(retVal);
}
TsRunInfo tsi;
ITsTextProps ttpRun;
bool fGotVerse = false;
int ich = ichPos;
if (ich > tss.Length)
{
ich = tss.Length;
}
while (ich >= 0)
{
// Get props of current run.
ttpRun = tss.FetchRunInfoAt(ich, out tsi);
// If we're at (the front edge of) a C/V number boundary and the
// caller said to associate the position with the previous material, then
// ignore this run unless we're at the beginning of the para.
// The run is actually the *following* run, which we don't care about.
if (!fAssocPrev || ichPos <= 0 || ichPos != tsi.ichMin)
{
// See if it is our verse number style.
if (!fGotVerse && StStyle.IsStyle(ttpRun, ScrStyleNames.VerseNumber))
{
// The whole run is the verse number. Extract it.
string sVerseNum = tss.get_RunText(tsi.irun);
// string sVerseNum = tss.Text.Substring(tsi.ichMin,
// tsi.ichLim - tsi.ichMin);
int startVerse, endVerse;
ScrReference.VerseToInt(sVerseNum, out startVerse, out endVerse);
refStart.Verse = startVerse;
refEnd.Verse = endVerse;
fGotVerse = true;
retVal = ChapterVerseFound.Verse;
}
// See if it is our chapter number style.
else if (StStyle.IsStyle(ttpRun, ScrStyleNames.ChapterNumber))
{
try
{
// Assume the whole run is the chapter number. Extract it.
string sChapterNum = tss.get_RunText(tsi.irun);
int nChapter = ScrReference.ChapterToInt(sChapterNum);
refStart.Chapter = refEnd.Chapter = nChapter;
if (fGotVerse)
{
// Found a chapter number to go with the verse number we
// already found, so build the full reference using this
// chapter with the previously found verse (already set).
retVal |= ChapterVerseFound.Chapter;
}
else
{
// Found a chapter number but no verse number, so assume the
// edited text is in verse 1 of the chapter.
refStart.Verse = refEnd.Verse = 1;
fGotVerse = true;
retVal = ChapterVerseFound.Chapter | ChapterVerseFound.Verse;
}
break;
}
catch (ArgumentException)
{
// ignore runs with invalid Chapter numbers
}
}
}
// move index (going backwards) to the character just before the Min of the run
// we just looked at
ich = tsi.ichMin - 1;
}
return(retVal);
}
