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/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package com.sun.javafx.font.coretext;
import com.sun.javafx.font.CompositeFontResource;
import com.sun.javafx.font.CompositeStrike;
import com.sun.javafx.font.FontResource;
import com.sun.javafx.font.FontStrike;
import com.sun.javafx.font.PGFont;
import com.sun.javafx.font.PrismFontFactory;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.javafx.scene.text.TextSpan;
import com.sun.javafx.text.GlyphLayout;
import com.sun.javafx.text.ScriptMapper;
import com.sun.javafx.text.PrismTextLayout;
import com.sun.javafx.text.TextRun;
import java.text.Bidi;
import java.util.Arrays;
import static com.sun.javafx.scene.text.TextLayout.FLAGS_ANALYSIS_VALID;
import static com.sun.javafx.scene.text.TextLayout.FLAGS_HAS_COMPLEX;
import static com.sun.javafx.scene.text.TextLayout.FLAGS_HAS_BIDI;
import static com.sun.javafx.scene.text.TextLayout.FLAGS_HAS_TABS;
import static com.sun.javafx.scene.text.TextLayout.FLAGS_HAS_EMBEDDED;
import static com.sun.javafx.scene.text.TextLayout.FLAGS_RTL_BASE;
class CTGlyphLayout extends GlyphLayout {
private TextRun addTextRun(PrismTextLayout layout, char[] chars, int start, int length,
PGFont font, TextSpan span, byte level, boolean complex) {
TextRun textRun = null;
if (complex) {
/* Use CoreText to analize the run */
long alloc = OS.kCFAllocatorDefault();
long textRef = OS.CFStringCreateWithCharacters(alloc, chars, start, length);
FontStrike fontStrike = font.getStrike(BaseTransform.IDENTITY_TRANSFORM);
boolean composite = fontStrike instanceof CompositeStrike;
if (composite) {
fontStrike = ((CompositeStrike)fontStrike).getStrikeSlot(0);
}
CTFontStrike strike = (CTFontStrike)fontStrike;
long fontRef = strike.getFontRef();
long attributes = OS.CFDictionaryCreateMutable(alloc, 4, OS.kCFTypeDictionaryKeyCallBacks(), OS.kCFTypeDictionaryValueCallBacks());
OS.CFDictionaryAddValue(attributes, OS.kCTFontAttributeName(), fontRef);
/* Note that by default CoreText will apply kerning depending on the font*/
long attString = OS.CFAttributedStringCreate(alloc, textRef, attributes);
long lineRef = OS.CTLineCreateWithAttributedString(attString);
OS.CFRelease(attributes);
OS.CFRelease(attString);
OS.CFRelease(textRef);
long runs = OS.CTLineGetGlyphRuns(lineRef);
long runCount = OS.CFArrayGetCount(runs);
/*
* Need to undo the bidi reordering done by CoreText as it will be
* done again in text layout after wrapping.
*/
boolean bidi = (level & 1) != 0;
int i = bidi ? (int)runCount - 1 : 0;
int step = bidi ? -1 : 1;
for (; 0 <= i && i < runCount; i += step) {
long run = OS.CFArrayGetValueAtIndex(runs, i);
int status = OS.CTRunGetStatus(run);
boolean runBidi = (status & OS.kCTRunStatusRightToLeft) != 0;
if (bidi != runBidi) {
if (PrismFontFactory.debugFonts) {
System.err.println("[CoreText] not expecing bidi level to differ.");
}
}
CFRange range = OS.CTRunGetStringRange(run);
int glyphCount = (int)OS.CTRunGetGlyphCount(run);
int[] glyphs = OS.CTRunGetGlyphsPtr(run);
/*
* The positions and indices returned by core text are
* relative to the line, the following native methods
* are custom to return values relative to the run.
*/
float[] positions = OS.CTRunGetPositionsPtr(run);
int[] indices = OS.CTRunGetStringIndicesPtr(run);
if (PrismFontFactory.debugFonts) {
System.err.println("Run " + i + " range " + (start+range.location) + ", " + range.length);
System.err.println("\tText=[" + new String(chars, start + (int)range.location, (int)range.length) + "]");
System.err.println("\tFont=" +strike.getFontResource());
System.err.println("\tStatus="+status);
System.err.println("\tGlyphs="+Arrays.toString(glyphs));
System.err.println("\tPositions="+Arrays.toString(positions));
System.err.println("\tIndices="+Arrays.toString(indices));
}
if (composite) {
long runAttrs = OS.CTRunGetAttributes(run);
long actualFont = OS.CFDictionaryGetValue(runAttrs, OS.kCTFontAttributeName());
String fontName = OS.CTFontCopyDisplayName(actualFont);
if (!fontName.equalsIgnoreCase(strike.getFontResource().getFullName())) {
CompositeFontResource fr = (CompositeFontResource)font.getFontResource();
int slot = fr.getSlotForFont(fontName) << 24;
if (PrismFontFactory.debugFonts) {
System.err.println("\tFallback front= "+ fontName + " slot=" + (slot>>24));
}
for (int j = 0; j < glyphs.length; j++) {
glyphs[j] |= slot;
}
}
}
textRun = new TextRun(start + (int)range.location, (int)range.length, level, true, 0, span, 0, false);
textRun.shape(glyphCount, glyphs, positions, indices);
layout.addTextRun(textRun);
}
OS.CFRelease(lineRef);
} else {
textRun = new TextRun(start, length, level, false, 0, span, 0, false);
layout.addTextRun(textRun);
}
return textRun;
}
public int breakRuns(PrismTextLayout layout, char[] chars, int flags) {
int length = chars.length;
boolean complexRun = false;
boolean complex = false;
boolean feature = false;
boolean checkComplex = true;
boolean checkBidi = true;
if ((flags & FLAGS_ANALYSIS_VALID) != 0) {
/* Avoid work when it is known neither complex
* text nor bidi are not present. */
checkComplex = (flags & FLAGS_HAS_COMPLEX) != 0;
checkBidi = (flags & FLAGS_HAS_BIDI) != 0;
}
TextRun run = null;
Bidi bidi = null;
byte bidiLevel = 0;
int bidiEnd = length;
int bidiIndex = 0;
int spanIndex = 0;
TextSpan span = null;
int spanEnd = length;
PGFont font = null;
TextSpan[] spans = layout.getTextSpans();
if (spans != null) {
if (spans.length > 0) {
span = spans[spanIndex];
spanEnd = span.getText().length();
font = (PGFont)span.getFont();
if (font == null) {
flags |= FLAGS_HAS_EMBEDDED;
}
}
} else {
font = layout.getFont();
}
if (font != null) {
FontResource fr = font.getFontResource();
int requestedFeatures = font.getFeatures();
int supportedFeatures = fr.getFeatures();
feature = (requestedFeatures & supportedFeatures) != 0;
}
if (checkBidi && length > 0) {
int direction = layout.getDirection();
bidi = new Bidi(chars, 0, null, 0, length, direction);
/* Temporary Code: See RT-26997 */
// bidiLevel = (byte)bidi.getRunLevel(bidiIndex);
bidiLevel = (byte)bidi.getLevelAt(bidi.getRunStart(bidiIndex));
bidiEnd = bidi.getRunLimit(bidiIndex);
if ((bidiLevel & 1) != 0) {
flags |= FLAGS_HAS_BIDI;
}
}
int start = 0;
int i = 0;
while (i < length) {
char ch = chars[i];
int codePoint = ch;
boolean delimiterChanged = ch == '\t' || ch == '\n' || ch == '\r';
boolean spanChanged = i >= spanEnd;
boolean levelChanged = i >= bidiEnd;
boolean complexChanged = false;
if (checkComplex) {
if (Character.isHighSurrogate(ch)) {
/* Only merge surrogate when the pair is in the same span. */
if (i + 1 < spanEnd && Character.isLowSurrogate(chars[i + 1])) {
codePoint = Character.toCodePoint(ch, chars[++i]);
}
}
if (Character.isWhitespace(codePoint)) {
complex = feature || complexRun;
} else {
complex = feature || ScriptMapper.isComplexCharCode(codePoint);
}
complexChanged = complex != complexRun;
}
if (delimiterChanged || spanChanged || levelChanged || complexChanged) {
/* Create text run */
if (i != start) {
run = addTextRun(layout, chars, start, i - start,
font, span, bidiLevel, complexRun);
if (complexRun) {
flags |= FLAGS_HAS_COMPLEX;
}
start = i;
}
if (delimiterChanged) {
i++;
/* Only merge \r\n when the are in the same text span */
if (ch == '\r' && i < spanEnd && chars[i] == '\n') {
i++;
}
/* Create delimiter run */
run = new TextRun(start, i - start, bidiLevel, false,
ScriptMapper.COMMON, span, 0, false);
if (ch == '\t') {
run.setTab();
flags |= FLAGS_HAS_TABS;
} else {
run.setLinebreak();
}
layout.addTextRun(run);
start = i;
if (i == length) break;
spanChanged = i >= spanEnd;
levelChanged = i >= bidiEnd;
}
if (spanChanged) {
/* Only true for rich text (spans != null) */
span = spans[++spanIndex];
spanEnd += span.getText().length();
font = (PGFont)span.getFont();
if (font == null) {
flags |= FLAGS_HAS_EMBEDDED;
} else {
FontResource fr = font.getFontResource();
int requestedFeatures = font.getFeatures();
int supportedFeatures = fr.getFeatures();
feature = (requestedFeatures & supportedFeatures) != 0;
}
}
if (levelChanged) {
bidiIndex++;
/* Temporary Code: See RT-26997 */
// bidiLevel = (byte)bidi.getRunLevel(bidiIndex);
bidiLevel = (byte)bidi.getLevelAt(bidi.getRunStart(bidiIndex));
bidiEnd = bidi.getRunLimit(bidiIndex);
if ((bidiLevel & 1) != 0) {
flags |= FLAGS_HAS_BIDI;
}
}
if (complexChanged) {
if (delimiterChanged) {
ch = chars[i]; /* update ch because of delimiterChanged */
if (Character.isHighSurrogate(ch)) {
/* Only merge surrogate when the pair is in the same span */
if (i + 1 < spanEnd && Character.isLowSurrogate(chars[i + 1])) {
codePoint = Character.toCodePoint(ch, chars[++i]);
}
}
if (Character.isWhitespace(codePoint)) {
complex = feature || complexRun;
} else {
complex = feature || ScriptMapper.isComplexCharCode(codePoint);
}
}
complexRun = complex;
}
}
if (!delimiterChanged) i++;
}
/* Create final text run */
if (start < length) {
addTextRun(layout, chars, start, length - start,
font, span, bidiLevel, complexRun);
if (complexRun) {
flags |= FLAGS_HAS_COMPLEX;
}
} else {
/* Ensure every lines has at least one run */
if (run == null || run.isLinebreak()) {
run = new TextRun(start, 0, (byte)0, false,
ScriptMapper.COMMON, span, 0, false);
layout.addTextRun(run);
}
}
if (bidi != null) {
if (!bidi.baseIsLeftToRight()) {
flags |= FLAGS_RTL_BASE;
}
}
flags |= FLAGS_ANALYSIS_VALID;
return flags;
}
public void layout(TextRun run, PGFont font, FontStrike strike, char[] text) {
// Nothing - complex run are analyzed by CoreText during break run
}
}
