--- /dev/null
+/*
+ *
+ * (C) Copyright IBM Corp. 1998-2007 - All Rights Reserved
+ *
+ */
+
+#include "unicode/utypes.h"
+#include "unicode/uchar.h"
+#include "unicode/ubidi.h"
+#include "unicode/ustring.h"
+
+#include "layout/LETypes.h"
+
+#include "layout/loengine.h"
+#include "layout/playout.h"
+#include "layout/plruns.h"
+
+#include "pflow.h"
+
+#include "arraymem.h"
+#include "ucreader.h"
+
+/*
+ * Move the line below out of this comment
+ * to add a locale run to the pl_paragraphs
+ * that are created.
+#define TEST_LOCALE "zh_TW"
+ */
+
+#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
+
+struct pf_object
+{
+ pl_paragraph **fParagraphLayout;
+
+ le_int32 fParagraphCount;
+ le_int32 fParagraphMax;
+ le_int32 fParagraphGrow;
+
+ le_int32 fLineCount;
+ le_int32 fLinesMax;
+ le_int32 fLinesGrow;
+
+ pl_line **fLines;
+
+ LEUnicode *fChars;
+
+ le_int32 fLineHeight;
+ le_int32 fAscent;
+ le_int32 fWidth;
+ le_int32 fHeight;
+ UBiDiLevel fParagraphLevel;
+};
+
+typedef struct pf_object pf_object;
+
+
+static LEUnicode *skipLineEnd(LEUnicode *ptr)
+{
+ if (ptr[0] == CH_CR && ptr[1] == CH_LF) {
+ ptr += 1;
+ }
+
+ return ptr + 1;
+}
+
+static le_int32 findFontRun(const pl_fontRuns *fontRuns, le_int32 offset)
+{
+ le_int32 runCount = pl_getFontRunCount(fontRuns);
+ le_int32 run;
+
+ for (run = 0; run < runCount; run += 1) {
+ if (pl_getFontRunLimit(fontRuns, run) > offset) {
+ return run;
+ }
+ }
+
+ return -1;
+}
+
+static void subsetFontRuns(const pl_fontRuns *fontRuns, le_int32 start, le_int32 limit, pl_fontRuns *sub)
+{
+ le_int32 startRun = findFontRun(fontRuns, start);
+ le_int32 endRun = findFontRun(fontRuns, limit - 1);
+ le_int32 run;
+
+ pl_resetFontRuns(sub);
+
+ for (run = startRun; run <= endRun; run += 1) {
+ const le_font *runFont = pl_getFontRunFont(fontRuns, run);
+ le_int32 runLimit = pl_getFontRunLimit(fontRuns, run) - start;
+
+ if (run == endRun) {
+ runLimit = limit - start;
+ }
+
+ pl_addFontRun(sub, runFont, runLimit);
+ }
+}
+
+pf_flow *pf_create(const LEUnicode chars[], le_int32 charCount, const pl_fontRuns *fontRuns, LEErrorCode *status)
+{
+ pf_object *flow;
+ le_int32 ascent = 0;
+ le_int32 descent = 0;
+ le_int32 leading = 0;
+ pl_localeRuns *locales = NULL;
+ pl_fontRuns *fr;
+ LEUnicode *pStart;
+ static const LEUnicode separators[] = {CH_LF, CH_CR, CH_LSEP, CH_PSEP, 0x0000};
+
+ if (LE_FAILURE(*status)) {
+ return NULL;
+ }
+
+ flow = NEW_ARRAY(pf_object, 1);
+
+ flow->fParagraphLayout = NULL;
+ flow->fParagraphCount = 0;
+ flow->fParagraphMax = PARA_GROW;
+ flow->fParagraphGrow = PARA_GROW;
+ flow->fLineCount = 0;
+ flow->fLinesMax = LINE_GROW;
+ flow->fLinesGrow = LINE_GROW;
+ flow->fLines = NULL;
+ flow->fChars = NULL;
+ flow->fLineHeight = -1;
+ flow->fAscent = -1;
+ flow->fWidth = -1;
+ flow->fHeight = -1;
+ flow->fParagraphLevel = UBIDI_DEFAULT_LTR;
+
+ fr = pl_openEmptyFontRuns(0);
+
+#ifdef TEST_LOCALE
+ locales = pl_openEmptyLocaleRuns(0);
+#endif
+
+ flow->fLines = NEW_ARRAY(pl_line *, flow->fLinesMax);
+ flow->fParagraphLayout = NEW_ARRAY(pl_paragraph *, flow->fParagraphMax);
+
+ flow->fChars = NEW_ARRAY(LEUnicode, charCount + 1);
+ LE_ARRAY_COPY(flow->fChars, chars, charCount);
+ flow->fChars[charCount] = 0;
+
+ pStart = &flow->fChars[0];
+
+ while (*pStart != 0) {
+ LEUnicode *pEnd = u_strpbrk(pStart, separators);
+ le_int32 pAscent, pDescent, pLeading;
+ pl_paragraph *paragraphLayout = NULL;
+
+ if (pEnd == NULL) {
+ pEnd = &flow->fChars[charCount];
+ }
+
+ if (pEnd != pStart) {
+ subsetFontRuns(fontRuns, pStart - flow->fChars, pEnd - flow->fChars, fr);
+
+#ifdef TEST_LOCALE
+ pl_resetLocaleRuns(locales);
+ pl_addLocaleRun(locales, TEST_LOCALE, pEnd - pStart);
+#endif
+
+ paragraphLayout = pl_create(pStart, pEnd - pStart, fr, NULL, NULL, locales, flow->fParagraphLevel, FALSE, status);
+
+ if (LE_FAILURE(*status)) {
+ break; /* return? something else? */
+ }
+
+ if (flow->fParagraphLevel == UBIDI_DEFAULT_LTR) {
+ flow->fParagraphLevel = pl_getParagraphLevel(paragraphLayout);
+ }
+
+ pAscent = pl_getAscent(paragraphLayout);
+ pDescent = pl_getDescent(paragraphLayout);
+ pLeading = pl_getLeading(paragraphLayout);
+
+ if (pAscent > ascent) {
+ ascent = pAscent;
+ }
+
+ if (pDescent > descent) {
+ descent = pDescent;
+ }
+
+ if (pLeading > leading) {
+ leading = pLeading;
+ }
+ }
+
+ if (flow->fParagraphCount >= flow->fParagraphMax) {
+ flow->fParagraphLayout = (pl_paragraph **) GROW_ARRAY(flow->fParagraphLayout, flow->fParagraphMax + flow->fParagraphGrow);
+ flow->fParagraphMax += flow->fParagraphGrow;
+ }
+
+ flow->fParagraphLayout[flow->fParagraphCount++] = paragraphLayout;
+
+ if (*pEnd == 0) {
+ break;
+ }
+
+ pStart = skipLineEnd(pEnd);
+ }
+
+ flow->fLineHeight = ascent + descent + leading;
+ flow->fAscent = ascent;
+
+ pl_closeLocaleRuns(locales);
+ pl_closeFontRuns(fr);
+
+ return (pf_flow *) flow;
+}
+
+void pf_close(pf_flow *flow)
+{
+ pf_object *obj = (pf_object *) flow;
+ le_int32 i;
+
+ for (i = 0; i < obj->fLineCount; i += 1) {
+ DELETE_ARRAY(obj->fLines[i]);
+ }
+
+ DELETE_ARRAY(obj->fLines);
+
+ for (i = 0; i < obj->fParagraphCount; i += 1) {
+ pl_close(obj->fParagraphLayout[i]);
+ }
+
+ DELETE_ARRAY(obj->fParagraphLayout);
+
+ DELETE_ARRAY(obj->fChars);
+
+ DELETE_ARRAY(obj);
+}
+
+
+le_int32 pf_getAscent(pf_flow *flow)
+{
+ pf_object *obj = (pf_object *) flow;
+
+ return obj->fAscent;
+}
+
+le_int32 pf_getLineHeight(pf_flow *flow)
+{
+ pf_object *obj = (pf_object *) flow;
+
+ return obj->fLineHeight;
+}
+
+le_int32 pf_getLineCount(pf_flow *flow)
+{
+ pf_object *obj = (pf_object *) flow;
+
+ return obj->fLineCount;
+}
+
+static void addLine(pf_object *obj, pl_line *line)
+{
+ if (obj->fLineCount >= obj->fLinesMax) {
+ obj->fLines = (pl_line **) GROW_ARRAY(obj->fLines, obj->fLinesMax + obj->fLinesGrow);
+ obj->fLinesMax += obj->fLinesGrow;
+ }
+
+ obj->fLines[obj->fLineCount++] = line;
+}
+
+void pf_breakLines(pf_flow *flow, le_int32 width, le_int32 height)
+{
+ pf_object *obj = (pf_object *) flow;
+ le_int32 li, p;
+ float lineWidth;
+ pl_line *line;
+
+ obj->fHeight = height;
+
+ /* don't re-break if the width hasn't changed */
+ if (obj->fWidth == width) {
+ return;
+ }
+
+ obj->fWidth = width;
+
+ lineWidth = (float) (width - 2 * MARGIN);
+
+ /* Free the old Lines... */
+ for (li = 0; li < obj->fLineCount; li += 1) {
+ pl_closeLine(obj->fLines[li]);
+ }
+
+ obj->fLineCount = 0;
+
+ for (p = 0; p < obj->fParagraphCount; p += 1) {
+ pl_paragraph *paragraphLayout = obj->fParagraphLayout[p];
+
+ if (paragraphLayout != NULL) {
+ pl_reflow(paragraphLayout);
+ while ((line = pl_nextLine(paragraphLayout, lineWidth)) != NULL) {
+ addLine(obj, line);
+ }
+ } else {
+ addLine(obj, NULL);
+ }
+ }
+}
+
+void pf_draw(pf_flow *flow, rs_surface *surface, le_int32 firstLine, le_int32 lastLine)
+{
+ pf_object *obj = (pf_object *) flow;
+ le_int32 li, x, y;
+
+ x = MARGIN;
+ y = obj->fAscent;
+
+ for (li = firstLine; li <= lastLine; li += 1) {
+ const pl_line *line = obj->fLines[li];
+
+ if (line != NULL) {
+ le_int32 runCount = pl_countLineRuns(line);
+ le_int32 run;
+
+ if (obj->fParagraphLevel == UBIDI_RTL) {
+ le_int32 lastX = pl_getLineWidth(line);
+
+ x = (obj->fWidth - lastX - MARGIN);
+ }
+
+
+ for (run = 0; run < runCount; run += 1) {
+ const pl_visualRun *visualRun = pl_getLineVisualRun(line, run);
+ le_int32 glyphCount = pl_getVisualRunGlyphCount(visualRun);
+ const le_font *font = pl_getVisualRunFont(visualRun);
+ const LEGlyphID *glyphs = pl_getVisualRunGlyphs(visualRun);
+ const float *positions = pl_getVisualRunPositions(visualRun);
+
+ rs_drawGlyphs(surface, font, glyphs, glyphCount, positions, x, y, obj->fWidth, obj->fHeight);
+ }
+ }
+
+ y += obj->fLineHeight;
+ }
+}
+
+pf_flow *pf_factory(const char *fileName, const le_font *font, gs_guiSupport *guiSupport)
+{
+ LEErrorCode status = LE_NO_ERROR;
+ le_int32 charCount;
+ const UChar *text = uc_readFile(fileName, guiSupport, &charCount);
+ pl_fontRuns *fontRuns;
+ pf_flow *result = NULL;
+
+ if (text == NULL) {
+ return NULL;
+ }
+
+ fontRuns = pl_openEmptyFontRuns(0);
+
+ pl_addFontRun(fontRuns, font, charCount);
+
+ result = pf_create(text, charCount, fontRuns, &status);
+
+ if (LE_FAILURE(status)) {
+ pf_close(result);
+ result = NULL;
+ }
+
+ pl_closeFontRuns(fontRuns);
+
+ DELETE_ARRAY(text);
+
+ return result;
+}
+
projects / apple / icu.git / blobdiff