/*
*******************************************************************************
*
- * Copyright (C) 1999-2003, International Business Machines
+ * Copyright (C) 1999-2005, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
#include "unicode/utypes.h"
#include "unicode/uchar.h"
#include "unicode/ubidi.h"
+#include "unicode/ustring.h"
#include "layout/ParagraphLayout.h"
#define MARGIN 10
#define LINE_GROW 32
+#define PARA_GROW 8
+
+#define CH_LF 0x000A
+#define CH_CR 0x000D
+#define CH_LSEP 0x2028
+#define CH_PSEP 0x2029
+
+static LEUnicode *skipLineEnd(LEUnicode *ptr)
+{
+ if (ptr[0] == CH_CR && ptr[1] == CH_LF) {
+ ptr += 1;
+ }
+
+ return ptr + 1;
+}
+
+static le_int32 findRun(const RunArray *runArray, le_int32 offset)
+{
+ le_int32 runCount = runArray->getCount();
+
+ for (le_int32 run = 0; run < runCount; run += 1) {
+ if (runArray->getLimit(run) > offset) {
+ return run;
+ }
+ }
+
+ return -1;
+}
+
+static void subsetFontRuns(const FontRuns *fontRuns, le_int32 start, le_int32 limit, FontRuns *sub)
+{
+ le_int32 startRun = findRun(fontRuns, start);
+ le_int32 endRun = findRun(fontRuns, limit - 1);
+
+ sub->reset();
+
+ for (le_int32 run = startRun; run <= endRun; run += 1) {
+ const LEFontInstance *runFont = fontRuns->getFont(run);
+ le_int32 runLimit = fontRuns->getLimit(run) - start;
+
+ if (run == endRun) {
+ runLimit = limit - start;
+ }
+
+ sub->add(runFont, runLimit);
+ }
+}
Paragraph::Paragraph(const LEUnicode chars[], int32_t charCount, const FontRuns *fontRuns, LEErrorCode &status)
- : fParagraphLayout(NULL), fLineCount(0), fLinesMax(0), fLinesGrow(LINE_GROW), fLines(NULL), fChars(NULL),
- fLineHeight(-1), fAscent(-1), fWidth(-1), fHeight(-1)
+ : 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};
+
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);
+ fChars = LE_NEW_ARRAY(LEUnicode, charCount + 1);
LE_ARRAY_COPY(fChars, chars, charCount);
+ fChars[charCount] = 0;
- fParagraphLayout = new ParagraphLayout(fChars, charCount, fontRuns, NULL, NULL, locales, UBIDI_DEFAULT_LTR, FALSE, status);
+ LEUnicode *pStart = &fChars[0];
- if (LE_FAILURE(status)) {
- return;
- }
+ while (*pStart != 0) {
+ LEUnicode *pEnd = u_strpbrk(pStart, separators);
+ le_int32 pAscent, pDescent, pLeading;
+ ParagraphLayout *paragraphLayout = NULL;
- le_int32 ascent = fParagraphLayout->getAscent();
- le_int32 descent = fParagraphLayout->getDescent();
- le_int32 leading = fParagraphLayout->getLeading();
+ 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)) {
+ 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;
LE_DELETE_ARRAY(fChars);
}
+void Paragraph::addLine(const ParagraphLayout::Line *line)
+{
+ if (fLineCount >= fLinesMax) {
+ fLines = (const ParagraphLayout::Line **) LE_GROW_ARRAY(fLines, fLinesMax + fLinesGrow);
+ fLinesMax += fLinesGrow;
+ }
+
+ fLines[fLineCount++] = line;
+}
+
void Paragraph::breakLines(le_int32 width, le_int32 height)
{
fHeight = height;
float lineWidth = (float) (width - 2 * MARGIN);
const ParagraphLayout::Line *line;
- le_int32 li;
// Free the old LineInfo's...
- for (li = 0; li < fLineCount; li += 1) {
+ for (le_int32 li = 0; li < fLineCount; li += 1) {
delete fLines[li];
}
- li = 0;
- fParagraphLayout->reflow();
- while ((line = fParagraphLayout->nextLine(lineWidth)) != NULL) {
- // grow the line array, if we need to.
- if (li >= fLinesMax) {
- fLines = (const ParagraphLayout::Line **) LE_GROW_ARRAY(fLines, fLinesMax + fLinesGrow);
- fLinesMax += fLinesGrow;
- }
+ fLineCount = 0;
- fLines[li++] = line;
- }
+ for (le_int32 p = 0; p < fParagraphCount; p += 1) {
+ ParagraphLayout *paragraphLayout = fParagraphLayout[p];
- fLineCount = li;
+ if (paragraphLayout != NULL) {
+ paragraphLayout->reflow();
+ while ((line = paragraphLayout->nextLine(lineWidth)) != NULL) {
+ addLine(line);
+ }
+ } else {
+ addLine(NULL);
+ }
+ }
}
void Paragraph::draw(RenderingSurface *surface, le_int32 firstLine, le_int32 lastLine)
for (li = firstLine; li <= lastLine; li += 1) {
const ParagraphLayout::Line *line = fLines[li];
- le_int32 runCount = line->countRuns();
- le_int32 run;
- if (fParagraphLayout->getParagraphLevel() == UBIDI_RTL) {
- le_int32 lastX = line->getWidth();
+ if (line != NULL) {
+ le_int32 runCount = line->countRuns();
+ le_int32 run;
+
+ if (fParagraphLevel == UBIDI_RTL) {
+ le_int32 lastX = line->getWidth();
- x = (fWidth - lastX - MARGIN);
- }
+ x = (fWidth - lastX - MARGIN);
+ }
- for (run = 0; run < runCount; run += 1) {
- const ParagraphLayout::VisualRun *visualRun = line->getVisualRun(run);
- le_int32 glyphCount = visualRun->getGlyphCount();
- const LEFontInstance *font = visualRun->getFont();
- const LEGlyphID *glyphs = visualRun->getGlyphs();
- const float *positions = visualRun->getPositions();
+ for (run = 0; run < runCount; run += 1) {
+ const ParagraphLayout::VisualRun *visualRun = line->getVisualRun(run);
+ le_int32 glyphCount = visualRun->getGlyphCount();
+ const LEFontInstance *font = visualRun->getFont();
+ const LEGlyphID *glyphs = visualRun->getGlyphs();
+ const float *positions = visualRun->getPositions();
- surface->drawGlyphs(font, glyphs, glyphCount, positions, x, y, fWidth, fHeight);
+ surface->drawGlyphs(font, glyphs, glyphCount, positions, x, y, fWidth, fHeight);
+ }
}
y += fLineHeight;
projects / apple / icu.git / blobdiff