void Paragraph::breakLines(le_int32 width, le_int32 height)
{
fHeight = height;
// don't re-break if the width hasn't changed
if (fWidth == width) {
return;
}
fWidth = width;
float lineWidth = (float) (width - 2 * MARGIN);
const ParagraphLayout::Line *line;
// Free the old LineInfo's...
for (le_int32 li = 0; li < fLineCount; li += 1) {
delete fLines[li];
}
fLineCount = 0;
for (le_int32 p = 0; p < fParagraphCount; p += 1) {
ParagraphLayout *paragraphLayout = fParagraphLayout[p];
if (paragraphLayout != NULL) {
paragraphLayout->reflow();
while ((line = paragraphLayout->nextLine(lineWidth)) != NULL) {
addLine(line);
}
} else {
addLine(NULL);
}
}
}
U_CAPI le_int32 U_EXPORT2
pl_getDescent(const pl_paragraph *paragraph)
{
ParagraphLayout *pl = (ParagraphLayout *) paragraph;
if (pl == NULL) {
return 0;
}
return pl->getDescent();
}
U_CAPI UBiDiDirection U_EXPORT2
pl_getTextDirection(pl_paragraph *paragraph)
{
ParagraphLayout *pl = (ParagraphLayout *) paragraph;
if (pl == NULL) {
return UBIDI_LTR;
}
return pl->getTextDirection();
}
U_CAPI UBiDiLevel U_EXPORT2
pl_getParagraphLevel(pl_paragraph *paragraph)
{
ParagraphLayout *pl = (ParagraphLayout *) paragraph;
if (pl == NULL) {
return 0;
}
return pl->getParagraphLevel();
}
U_CAPI pl_line * U_EXPORT2
pl_nextLine(pl_paragraph *paragraph, float width)
{
ParagraphLayout *pl = (ParagraphLayout *) paragraph;
if (pl == NULL) {
return NULL;
}
return (pl_line *) pl->nextLine(width);
}
U_CAPI void U_EXPORT2
pl_reflow(pl_paragraph *paragraph)
{
ParagraphLayout *pl = (ParagraphLayout *) paragraph;
if (pl == NULL) {
return;
}
return pl->reflow();
}
ParagraphLayouter::Line *NextLine(int max_width)
{
ParagraphLayout::Line *l = p->nextLine(max_width);
return l == NULL ? NULL : new ICULine(l);
}
void Reflow() { p->reflow(); }
Paragraph::Paragraph(const LEUnicode chars[], int32_t charCount, const FontRuns *fontRuns, LEErrorCode &status)
: fParagraphLayout(NULL), fParagraphCount(0), fParagraphMax(PARA_GROW), fParagraphGrow(PARA_GROW),
fLineCount(0), fLinesMax(LINE_GROW), fLinesGrow(LINE_GROW), fLines(NULL), fChars(NULL),
fLineHeight(-1), fAscent(-1), fWidth(-1), fHeight(-1), fParagraphLevel(UBIDI_DEFAULT_LTR)
{
static const LEUnicode separators[] = {CH_LF, CH_CR, CH_LSEP, CH_PSEP, 0x0000};
if (LE_FAILURE(status)) {
return;
}
le_int32 ascent = 0;
le_int32 descent = 0;
le_int32 leading = 0;
LocaleRuns *locales = NULL;
FontRuns fr(0);
fLines = LE_NEW_ARRAY(const ParagraphLayout::Line *, fLinesMax);
fParagraphLayout = LE_NEW_ARRAY(ParagraphLayout *, fParagraphMax);
fChars = LE_NEW_ARRAY(LEUnicode, charCount + 1);
LE_ARRAY_COPY(fChars, chars, charCount);
fChars[charCount] = 0;
LEUnicode *pStart = &fChars[0];
while (*pStart != 0) {
LEUnicode *pEnd = u_strpbrk(pStart, separators);
le_int32 pAscent, pDescent, pLeading;
ParagraphLayout *paragraphLayout = NULL;
if (pEnd == NULL) {
pEnd = &fChars[charCount];
}
if (pEnd != pStart) {
subsetFontRuns(fontRuns, pStart - fChars, pEnd - fChars, &fr);
paragraphLayout = new ParagraphLayout(pStart, pEnd - pStart, &fr, NULL, NULL, locales, fParagraphLevel, FALSE, status);
if (LE_FAILURE(status)) {
delete paragraphLayout;
break; // return? something else?
}
if (fParagraphLevel == UBIDI_DEFAULT_LTR) {
fParagraphLevel = paragraphLayout->getParagraphLevel();
}
pAscent = paragraphLayout->getAscent();
pDescent = paragraphLayout->getDescent();
pLeading = paragraphLayout->getLeading();
if (pAscent > ascent) {
ascent = pAscent;
}
if (pDescent > descent) {
descent = pDescent;
}
if (pLeading > leading) {
leading = pLeading;
}
}
if (fParagraphCount >= fParagraphMax) {
fParagraphLayout = (ParagraphLayout **) LE_GROW_ARRAY(fParagraphLayout, fParagraphMax + fParagraphGrow);
fParagraphMax += fParagraphGrow;
}
fParagraphLayout[fParagraphCount++] = paragraphLayout;
if (*pEnd == 0) {
break;
}
pStart = skipLineEnd(pEnd);
}
fLineHeight = ascent + descent + leading;
fAscent = ascent;
}
