/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.text;
import android.graphics.Bitmap;
import android.graphics.Paint;
import com.android.internal.util.ArrayUtils;
import android.util.Log;
import android.text.style.LeadingMarginSpan;
import android.text.style.LineHeightSpan;
import android.text.style.MetricAffectingSpan;
import android.text.style.ReplacementSpan;
/**
* StaticLayout is a Layout for text that will not be edited after it
* is laid out. Use {@link DynamicLayout} for text that may change.
* <p>This is used by widgets to control text layout. You should not need
* to use this class directly unless you are implementing your own widget
* or custom display object, or would be tempted to call
* {@link android.graphics.Canvas#drawText(java.lang.CharSequence, int, int, float, float, android.graphics.Paint)
* Canvas.drawText()} directly.</p>
*/
public class
StaticLayout
extends Layout
{
public StaticLayout(CharSequence source, TextPaint paint,
int width,
Alignment align, float spacingmult, float spacingadd,
boolean includepad) {
this(source, 0, source.length(), paint, width, align,
spacingmult, spacingadd, includepad);
}
public StaticLayout(CharSequence source, int bufstart, int bufend,
TextPaint paint, int outerwidth,
Alignment align,
float spacingmult, float spacingadd,
boolean includepad) {
this(source, bufstart, bufend, paint, outerwidth, align,
spacingmult, spacingadd, includepad, null, 0);
}
public StaticLayout(CharSequence source, int bufstart, int bufend,
TextPaint paint, int outerwidth,
Alignment align,
float spacingmult, float spacingadd,
boolean includepad,
TextUtils.TruncateAt ellipsize, int ellipsizedWidth) {
super((ellipsize == null)
? source
: (source instanceof Spanned)
? new SpannedEllipsizer(source)
: new Ellipsizer(source),
paint, outerwidth, align, spacingmult, spacingadd);
/*
* This is annoying, but we can't refer to the layout until
* superclass construction is finished, and the superclass
* constructor wants the reference to the display text.
*
* This will break if the superclass constructor ever actually
* cares about the content instead of just holding the reference.
*/
if (ellipsize != null) {
Ellipsizer e = (Ellipsizer) getText();
e.mLayout = this;
e.mWidth = ellipsizedWidth;
e.mMethod = ellipsize;
mEllipsizedWidth = ellipsizedWidth;
mColumns = COLUMNS_ELLIPSIZE;
} else {
mColumns = COLUMNS_NORMAL;
mEllipsizedWidth = outerwidth;
}
mLines = new int[ArrayUtils.idealIntArraySize(2 * mColumns)];
mLineDirections = new Directions[
ArrayUtils.idealIntArraySize(2 * mColumns)];
generate(source, bufstart, bufend, paint, outerwidth, align,
spacingmult, spacingadd, includepad, includepad,
ellipsize != null, ellipsizedWidth, ellipsize);
mChdirs = null;
mChs = null;
mWidths = null;
mFontMetricsInt = null;
}
/* package */ StaticLayout(boolean ellipsize) {
super(null, null, 0, null, 0, 0);
mColumns = COLUMNS_ELLIPSIZE;
mLines = new int[ArrayUtils.idealIntArraySize(2 * mColumns)];
mLineDirections = new Directions[
ArrayUtils.idealIntArraySize(2 * mColumns)];
}
/* package */ void generate(CharSequence source, int bufstart, int bufend,
TextPaint paint, int outerwidth,
Alignment align,
float spacingmult, float spacingadd,
boolean includepad, boolean trackpad,
boolean breakOnlyAtSpaces,
float ellipsizedWidth, TextUtils.TruncateAt where) {
mLineCount = 0;
int v = 0;
boolean needMultiply = (spacingmult != 1 || spacingadd != 0);
Paint.FontMetricsInt fm = mFontMetricsInt;
int[] choosehtv = null;
int end = TextUtils.indexOf(source, '\n', bufstart, bufend);
int bufsiz = end >= 0 ? end - bufstart : bufend - bufstart;
boolean first = true;
if (mChdirs == null) {
mChdirs = new byte[ArrayUtils.idealByteArraySize(bufsiz + 1)];
mChs = new char[ArrayUtils.idealCharArraySize(bufsiz + 1)];
mWidths = new float[ArrayUtils.idealIntArraySize((bufsiz + 1) * 2)];
}
byte[] chdirs = mChdirs;
char[] chs = mChs;
float[] widths = mWidths;
AlteredCharSequence alter = null;
Spanned spanned = null;
if (source instanceof Spanned)
spanned = (Spanned) source;
int DEFAULT_DIR = DIR_LEFT_TO_RIGHT; // XXX
for (int start = bufstart; start <= bufend; start = end) {
if (first)
first = false;
else
end = TextUtils.indexOf(source, '\n', start, bufend);
if (end < 0)
end = bufend;
else
end++;
int firstwidth = outerwidth;
int restwidth = outerwidth;
LineHeightSpan[] chooseht = null;
if (spanned != null) {
LeadingMarginSpan[] sp;
sp = spanned.getSpans(start, end, LeadingMarginSpan.class);
for (int i = 0; i < sp.length; i++) {
firstwidth -= sp[i].getLeadingMargin(true);
restwidth -= sp[i].getLeadingMargin(false);
}
chooseht = spanned.getSpans(start, end, LineHeightSpan.class);
if (chooseht.length != 0) {
if (choosehtv == null ||
choosehtv.length < chooseht.length) {
choosehtv = new int[ArrayUtils.idealIntArraySize(
chooseht.length)];
}
for (int i = 0; i < chooseht.length; i++) {
int o = spanned.getSpanStart(chooseht[i]);
if (o < start) {
// starts in this layout, before the
// current paragraph
choosehtv[i] = getLineTop(getLineForOffset(o));
} else {
// starts in this paragraph
choosehtv[i] = v;
}
}
}
}
if (end - start > chdirs.length) {
chdirs = new byte[ArrayUtils.idealByteArraySize(end - start)];
mChdirs = chdirs;
}
if (end - start > chs.length) {
chs = new char[ArrayUtils.idealCharArraySize(end - start)];
mChs = chs;
}
if ((end - start) * 2 > widths.length) {
widths = new float[ArrayUtils.idealIntArraySize((end - start) * 2)];
mWidths = widths;
}
TextUtils.getChars(source, start, end, chs, 0);
final int n = end - start;
boolean easy = true;
boolean altered = false;
int dir = DEFAULT_DIR; // XXX
for (int i = 0; i < n; i++) {
if (chs[i] >= FIRST_RIGHT_TO_LEFT) {
easy = false;
break;
}
}
if (!easy) {
AndroidCharacter.getDirectionalities(chs, chdirs, end - start);
/*
* Determine primary paragraph direction
*/
for (int j = start; j < end; j++) {
int d = chdirs[j - start];
if (d == Character.DIRECTIONALITY_LEFT_TO_RIGHT) {
dir = DIR_LEFT_TO_RIGHT;
break;
}
if (d == Character.DIRECTIONALITY_RIGHT_TO_LEFT) {
dir = DIR_RIGHT_TO_LEFT;
break;
}
}
/*
* XXX Explicit overrides should go here
*/
/*
* Weak type resolution
*/
final byte SOR = dir == DIR_LEFT_TO_RIGHT ?
Character.DIRECTIONALITY_LEFT_TO_RIGHT :
Character.DIRECTIONALITY_RIGHT_TO_LEFT;
// dump(chdirs, n, "initial");
// W1 non spacing marks
for (int j = 0; j < n; j++) {
if (chdirs[j] == Character.NON_SPACING_MARK) {
if (j == 0)
chdirs[j] = SOR;
else
chdirs[j] = chdirs[j - 1];
}
}
// dump(chdirs, n, "W1");
// W2 european numbers
byte cur = SOR;
for (int j = 0; j < n; j++) {
byte d = chdirs[j];
if (d == Character.DIRECTIONALITY_LEFT_TO_RIGHT ||
d == Character.DIRECTIONALITY_RIGHT_TO_LEFT ||
d == Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC)
cur = d;
else if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER) {
if (cur ==
Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC)
chdirs[j] = Character.DIRECTIONALITY_ARABIC_NUMBER;
}
}
// dump(chdirs, n, "W2");
// W3 arabic letters
for (int j = 0; j < n; j++) {
if (chdirs[j] == Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC)
chdirs[j] = Character.DIRECTIONALITY_RIGHT_TO_LEFT;
}
// dump(chdirs, n, "W3");
// W4 single separator between numbers
for (int j = 1; j < n - 1; j++) {
byte d = chdirs[j];
byte prev = chdirs[j - 1];
byte next = chdirs[j + 1];
if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR) {
if (prev == Character.DIRECTIONALITY_EUROPEAN_NUMBER &&
next == Character.DIRECTIONALITY_EUROPEAN_NUMBER)
chdirs[j] = Character.DIRECTIONALITY_EUROPEAN_NUMBER;
} else if (d == Character.DIRECTIONALITY_COMMON_NUMBER_SEPARATOR) {
if (prev == Character.DIRECTIONALITY_EUROPEAN_NUMBER &&
next == Character.DIRECTIONALITY_EUROPEAN_NUMBER)
chdirs[j] = Character.DIRECTIONALITY_EUROPEAN_NUMBER;
if (prev == Character.DIRECTIONALITY_ARABIC_NUMBER &&
next == Character.DIRECTIONALITY_ARABIC_NUMBER)
chdirs[j] = Character.DIRECTIONALITY_ARABIC_NUMBER;
}
}
// dump(chdirs, n, "W4");
// W5 european number terminators
boolean adjacent = false;
for (int j = 0; j < n; j++) {
byte d = chdirs[j];
if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER)
adjacent = true;
else if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR && adjacent)
chdirs[j] = Character.DIRECTIONALITY_EUROPEAN_NUMBER;
else
adjacent = false;
}
//dump(chdirs, n, "W5");
// W5 european number terminators part 2,
// W6 separators and terminators
adjacent = false;
for (int j = n - 1; j >= 0; j--) {
byte d = chdirs[j];
if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER)
adjacent = true;
else if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR) {
if (adjacent)
chdirs[j] = Character.DIRECTIONALITY_EUROPEAN_NUMBER;
else
chdirs[j] = Character.DIRECTIONALITY_OTHER_NEUTRALS;
}
else {
adjacent = false;
if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR ||
d == Character.DIRECTIONALITY_COMMON_NUMBER_SEPARATOR ||
d == Character.DIRECTIONALITY_PARAGRAPH_SEPARATOR ||
d == Character.DIRECTIONALITY_SEGMENT_SEPARATOR)
chdirs[j] = Character.DIRECTIONALITY_OTHER_NEUTRALS;
}
}
// dump(chdirs, n, "W6");
// W7 strong direction of european numbers
cur = SOR;
for (int j = 0; j < n; j++) {
byte d = chdirs[j];
if (d == SOR ||
d == Character.DIRECTIONALITY_LEFT_TO_RIGHT ||
d == Character.DIRECTIONALITY_RIGHT_TO_LEFT)
cur = d;
if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER)
chdirs[j] = cur;
}
// dump(chdirs, n, "W7");
// N1, N2 neutrals
cur = SOR;
for (int j = 0; j < n; j++) {
byte d = chdirs[j];
if (d == Character.DIRECTIONALITY_LEFT_TO_RIGHT ||
d == Character.DIRECTIONALITY_RIGHT_TO_LEFT) {
cur = d;
} else if (d == Character.DIRECTIONALITY_EUROPEAN_NUMBER ||
d == Character.DIRECTIONALITY_ARABIC_NUMBER) {
cur = Character.DIRECTIONALITY_RIGHT_TO_LEFT;
} else {
byte dd = SOR;
int k;
for (k = j + 1; k < n; k++) {
dd = chdirs[k];
if (dd == Character.DIRECTIONALITY_LEFT_TO_RIGHT ||
dd == Character.DIRECTIONALITY_RIGHT_TO_LEFT) {
break;
}
if (dd == Character.DIRECTIONALITY_EUROPEAN_NUMBER ||
dd == Character.DIRECTIONALITY_ARABIC_NUMBER) {
dd = Character.DIRECTIONALITY_RIGHT_TO_LEFT;
break;
}
}
for (int y = j; y < k; y++) {
if (dd == cur)
chdirs[y] = cur;
else
chdirs[y] = SOR;
}
j = k - 1;
}
}
// dump(chdirs, n, "final");
// extra: enforce that all tabs and surrogate characters go the
// primary direction
// TODO: actually do directions right for surrogates
for (int j = 0; j < n; j++) {
char c = chs[j];
if (c == '\t' || (c >= 0xD800 && c <= 0xDFFF)) {
chdirs[j] = SOR;
}
}
// extra: enforce that object replacements go to the
// primary direction
// and that none of the underlying characters are treated
// as viable breakpoints
if (source instanceof Spanned) {
Spanned sp = (Spanned) source;
ReplacementSpan[] spans = sp.getSpans(start, end, ReplacementSpan.class);
for (int y = 0; y < spans.length; y++) {
int a = sp.getSpanStart(spans[y]);
int b = sp.getSpanEnd(spans[y]);
for (int x = a; x < b; x++) {
chdirs[x - start] = SOR;
chs[x - start] = '\uFFFC';
}
}
}
// Do mirroring for right-to-left segments
for (int i = 0; i < n; i++) {
if (chdirs[i] == Character.DIRECTIONALITY_RIGHT_TO_LEFT) {
int j;
for (j = i; j < n; j++) {
if (chdirs[j] !=
Character.DIRECTIONALITY_RIGHT_TO_LEFT)
break;
}
if (AndroidCharacter.mirror(chs, i, j - i))
altered = true;
i = j - 1;
}
}
}
CharSequence sub;
if (altered) {
if (alter == null)
alter = AlteredCharSequence.make(source, chs, start, end);
else
alter.update(chs, start, end);
sub = alter;
} else {
sub = source;
}
int width = firstwidth;
float w = 0;
int here = start;
int ok = start;
float okwidth = w;
int okascent = 0, okdescent = 0, oktop = 0, okbottom = 0;
int fit = start;
float fitwidth = w;
int fitascent = 0, fitdescent = 0, fittop = 0, fitbottom = 0;
boolean tab = false;
int next;
for (int i = start; i < end; i = next) {
if (spanned == null)
next = end;
else
next = spanned.nextSpanTransition(i, end,
MetricAffectingSpan.
class);
if (spanned == null) {
paint.getTextWidths(sub, i, next, widths);
System.arraycopy(widths, 0, widths,
end - start + (i - start), next - i);
paint.getFontMetricsInt(fm);
} else {
mWorkPaint.baselineShift = 0;
Styled.getTextWidths(paint, mWorkPaint,
spanned, i, next,
widths, fm);
System.arraycopy(widths, 0, widths,
end - start + (i - start), next - i);
if (mWorkPaint.baselineShift < 0) {
fm.ascent += mWorkPaint.baselineShift;
fm.top += mWorkPaint.baselineShift;
} else {
fm.descent += mWorkPaint.baselineShift;
fm.bottom += mWorkPaint.baselineShift;
}
}
int fmtop = fm.top;
int fmbottom = fm.bottom;
int fmascent = fm.ascent;
int fmdescent = fm.descent;
if (false) {
StringBuilder sb = new StringBuilder();
for (int j = i; j < next; j++) {
sb.append(widths[j - start + (end - start)]);
sb.append(' ');
}
Log.e("text", sb.toString());
}
for (int j = i; j < next; j++) {
char c = chs[j - start];
float before = w;
if (c == '\n') {
;
} else if (c == '\t') {
w = Layout.nextTab(sub, start, end, w, null);
tab = true;
} else if (c >= 0xD800 && c <= 0xDFFF && j + 1 < next) {
int emoji = Character.codePointAt(chs, j - start);
if (emoji >= MIN_EMOJI && emoji <= MAX_EMOJI) {
Bitmap bm = EMOJI_FACTORY.
getBitmapFromAndroidPua(emoji);
if (bm != null) {
Paint whichPaint;
if (spanned == null) {
whichPaint = paint;
} else {
whichPaint = mWorkPaint;
}
float wid = (float) bm.getWidth() *
-whichPaint.ascent() /
bm.getHeight();
w += wid;
tab = true;
j++;
} else {
w += widths[j - start + (end - start)];
}
} else {
w += widths[j - start + (end - start)];
}
} else {
w += widths[j - start + (end - start)];
}
// Log.e("text", "was " + before + " now " + w + " after " + c + " within " + width);
if (w <= width) {
fitwidth = w;
fit = j + 1;
if (fmtop < fittop)
fittop = fmtop;
if (fmascent < fitascent)
fitascent = fmascent;
if (fmdescent > fitdescent)
fitdescent = fmdescent;
if (fmbottom > fitbottom)
fitbottom = fmbottom;
/*
* From the Unicode Line Breaking Algorithm:
* (at least approximately)
*
* .,:; are class IS: breakpoints
* except when adjacent to digits
* / is class SY: a breakpoint
* except when followed by a digit.
* - is class HY: a breakpoint
* except when followed by a digit.
*
* Ideographs are class ID: breakpoints when adjacent,
* except for NS (non-starters), which can be broken
* after but not before.
*/
if (c == ' ' || c == '\t' ||
((c == '.' || c == ',' || c == ':' || c == ';') &&
(j - 1 < here || !Character.isDigit(chs[j - 1 - start])) &&
(j + 1 >= next || !Character.isDigit(chs[j + 1 - start]))) ||
((c == '/' || c == '-') &&
(j + 1 >= next || !Character.isDigit(chs[j + 1 - start]))) ||
(c >= FIRST_CJK && isIdeographic(c, true) &&
j + 1 < next && isIdeographic(chs[j + 1 - start], false))) {
okwidth = w;
ok = j + 1;
if (fittop < oktop)
oktop = fittop;
if (fitascent < okascent)
okascent = fitascent;
if (fitdescent > okdescent)
okdescent = fitdescent;
if (fitbottom > okbottom)
okbottom = fitbottom;
}
} else if (breakOnlyAtSpaces) {
if (ok != here) {
// Log.e("text", "output ok " + here + " to " +ok);
while (ok < next && chs[ok - start] == ' ') {
ok++;
}
v = out(source,
here, ok,
okascent, okdescent, oktop, okbottom,
v,
spacingmult, spacingadd, chooseht,
choosehtv, fm, tab,
needMultiply, start, chdirs, dir, easy,
ok == bufend, includepad, trackpad,
widths, start, end - start,
where, ellipsizedWidth, okwidth,
paint);
here = ok;
} else {
// Act like it fit even though it didn't.
fitwidth = w;
fit = j + 1;
if (fmtop < fittop)
fittop = fmtop;
if (fmascent < fitascent)
fitascent = fmascent;
if (fmdescent > fitdescent)
fitdescent = fmdescent;
if (fmbottom > fitbottom)
fitbottom = fmbottom;
}
} else {
if (ok != here) {
// Log.e("text", "output ok " + here + " to " +ok);
while (ok < next && chs[ok - start] == ' ') {
ok++;
}
v = out(source,
here, ok,
okascent, okdescent, oktop, okbottom,
v,
spacingmult, spacingadd, chooseht,
choosehtv, fm, tab,
needMultiply, start, chdirs, dir, easy,
ok == bufend, includepad, trackpad,
widths, start, end - start,
where, ellipsizedWidth, okwidth,
paint);
here = ok;
} else if (fit != here) {
// Log.e("text", "output fit " + here + " to " +fit);
v = out(source,
here, fit,
fitascent, fitdescent,
fittop, fitbottom,
v,
spacingmult, spacingadd, chooseht,
choosehtv, fm, tab,
needMultiply, start, chdirs, dir, easy,
fit == bufend, includepad, trackpad,
widths, start, end - start,
where, ellipsizedWidth, fitwidth,
paint);
here = fit;
} else {
// Log.e("text", "output one " + here + " to " +(here + 1));
measureText(paint, mWorkPaint,
source, here, here + 1, fm, tab,
null);
v = out(source,
here, here+1,
fm.ascent, fm.descent,
fm.top, fm.bottom,
v,
spacingmult, spacingadd, chooseht,
choosehtv, fm, tab,
needMultiply, start, chdirs, dir, easy,
here + 1 == bufend, includepad,
trackpad,
widths, start, end - start,
where, ellipsizedWidth,
widths[here - start], paint);
here = here + 1;
}
if (here < i) {
j = next = here; // must remeasure
} else {
j = here - 1; // continue looping
}
ok = fit = here;
w = 0;
fitascent = fitdescent = fittop = fitbottom = 0;
okascent = okdescent = oktop = okbottom = 0;
width = restwidth;
}
}
}
if (end != here) {
if ((fittop | fitbottom | fitdescent | fitascent) == 0) {
paint.getFontMetricsInt(fm);
fittop = fm.top;
fitbottom = fm.bottom;
fitascent = fm.ascent;
fitdescent = fm.descent;
}
// Log.e("text", "output rest " + here + " to " + end);
v = out(source,
here, end, fitascent, fitdescent,
fittop, fitbottom,
v,
spacingmult, spacingadd, chooseht,
choosehtv, fm, tab,
needMultiply, start, chdirs, dir, easy,
end == bufend, includepad, trackpad,
widths, start, end - start,
where, ellipsizedWidth, w, paint);
}
start = end;
if (end == bufend)
break;
}
if (bufend == bufstart || source.charAt(bufend - 1) == '\n') {
// Log.e("text", "output last " + bufend);
paint.getFontMetricsInt(fm);
v = out(source,
bufend, bufend, fm.ascent, fm.descent,
fm.top, fm.bottom,
v,
spacingmult, spacingadd, null,
null, fm, false,
needMultiply, bufend, chdirs, DEFAULT_DIR, true,
true, includepad, trackpad,
widths, bufstart, 0,
where, ellipsizedWidth, 0, paint);
}
}
private static final char FIRST_CJK = '\u2E80';
/**
* Returns true if the specified character is one of those specified
* as being Ideographic (class ID) by the Unicode Line Breaking Algorithm
* (http://www.unicode.org/unicode/reports/tr14/), and is therefore OK
* to break between a pair of.
*
* @param includeNonStarters also return true for category NS
* (non-starters), which can be broken
* after but not before.
*/
private static final boolean isIdeographic(char c, boolean includeNonStarters) {
if (c >= '\u2E80' && c <= '\u2FFF') {
return true; // CJK, KANGXI RADICALS, DESCRIPTION SYMBOLS
}
if (c == '\u3000') {
return true; // IDEOGRAPHIC SPACE
}
if (c >= '\u3040' && c <= '\u309F') {
if (!includeNonStarters) {
switch (c) {
case '\u3041': // # HIRAGANA LETTER SMALL A
case '\u3043': // # HIRAGANA LETTER SMALL I
case '\u3045': // # HIRAGANA LETTER SMALL U
case '\u3047': // # HIRAGANA LETTER SMALL E
case '\u3049': // # HIRAGANA LETTER SMALL O
case '\u3063': // # HIRAGANA LETTER SMALL TU
case '\u3083': // # HIRAGANA LETTER SMALL YA
case '\u3085': // # HIRAGANA LETTER SMALL YU
case '\u3087': // # HIRAGANA LETTER SMALL YO
case '\u308E': // # HIRAGANA LETTER SMALL WA
case '\u3095': // # HIRAGANA LETTER SMALL KA
case '\u3096': // # HIRAGANA LETTER SMALL KE
case '\u309B': // # KATAKANA-HIRAGANA VOICED SOUND MARK
case '\u309C': // # KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
case '\u309D': // # HIRAGANA ITERATION MARK
case '\u309E': // # HIRAGANA VOICED ITERATION MARK
return false;
}
}
return true; // Hiragana (except small characters)
}
if (c >= '\u30A0' && c <= '\u30FF') {
if (!includeNonStarters) {
switch (c) {
case '\u30A0': // # KATAKANA-HIRAGANA DOUBLE HYPHEN
case '\u30A1': // # KATAKANA LETTER SMALL A
case '\u30A3': // # KATAKANA LETTER SMALL I
case '\u30A5': // # KATAKANA LETTER SMALL U
case '\u30A7': // # KATAKANA LETTER SMALL E
case '\u30A9': // # KATAKANA LETTER SMALL O
case '\u30C3': // # KATAKANA LETTER SMALL TU
case '\u30E3': // # KATAKANA LETTER SMALL YA
case '\u30E5': // # KATAKANA LETTER SMALL YU
case '\u30E7': // # KATAKANA LETTER SMALL YO
case '\u30EE': // # KATAKANA LETTER SMALL WA
case '\u30F5': // # KATAKANA LETTER SMALL KA
case '\u30F6': // # KATAKANA LETTER SMALL KE
case '\u30FB': // # KATAKANA MIDDLE DOT
case '\u30FC': // # KATAKANA-HIRAGANA PROLONGED SOUND MARK
case '\u30FD': // # KATAKANA ITERATION MARK
case '\u30FE': // # KATAKANA VOICED ITERATION MARK
return false;
}
}
return true; // Katakana (except small characters)
}
if (c >= '\u3400' && c <= '\u4DB5') {
return true; // CJK UNIFIED IDEOGRAPHS EXTENSION A
}
if (c >= '\u4E00' && c <= '\u9FBB') {
return true; // CJK UNIFIED IDEOGRAPHS
}
if (c >= '\uF900' && c <= '\uFAD9') {
return true; // CJK COMPATIBILITY IDEOGRAPHS
}
if (c >= '\uA000' && c <= '\uA48F') {
return true; // YI SYLLABLES
}
if (c >= '\uA490' && c <= '\uA4CF') {
return true; // YI RADICALS
}
if (c >= '\uFE62' && c <= '\uFE66') {
return true; // SMALL PLUS SIGN to SMALL EQUALS SIGN
}
if (c >= '\uFF10' && c <= '\uFF19') {
return true; // WIDE DIGITS
}
return false;
}
/*
private static void dump(byte[] data, int count, String label) {
if (false) {
System.out.print(label);
for (int i = 0; i < count; i++)
System.out.print(" " + data[i]);
System.out.println();
}
}
*/
private static int getFit(TextPaint paint,
TextPaint workPaint,
CharSequence text, int start, int end,
float wid) {
int high = end + 1, low = start - 1, guess;
while (high - low > 1) {
guess = (high + low) / 2;
if (measureText(paint, workPaint,
text, start, guess, null, true, null) > wid)
high = guess;
else
low = guess;
}
if (low < start)
return start;
else
return low;
}
private int out(CharSequence text, int start, int end,
int above, int below, int top, int bottom, int v,
float spacingmult, float spacingadd,
LineHeightSpan[] chooseht, int[] choosehtv,
Paint.FontMetricsInt fm, boolean tab,
boolean needMultiply, int pstart, byte[] chdirs,
int dir, boolean easy, boolean last,
boolean includepad, boolean trackpad,
float[] widths, int widstart, int widoff,
TextUtils.TruncateAt ellipsize, float ellipsiswidth,
float textwidth, TextPaint paint) {
int j = mLineCount;
int off = j * mColumns;
int want = off + mColumns + TOP;
int[] lines = mLines;
// Log.e("text", "line " + start + " to " + end + (last ? "===" : ""));
if (want >= lines.length) {
int nlen = ArrayUtils.idealIntArraySize(want + 1);
int[] grow = new int[nlen];
System.arraycopy(lines, 0, grow, 0, lines.length);
mLines = grow;
lines = grow;
Directions[] grow2 = new Directions[nlen];
System.arraycopy(mLineDirections, 0, grow2, 0,
mLineDirections.length);
mLineDirections = grow2;
}
if (chooseht != null) {
fm.ascent = above;
fm.descent = below;
fm.top = top;
fm.bottom = bottom;
for (int i = 0; i < chooseht.length; i++) {
chooseht[i].chooseHeight(text, start, end, choosehtv[i], v, fm);
}
above = fm.ascent;
below = fm.descent;
top = fm.top;
bottom = fm.bottom;
}
if (j == 0) {
if (trackpad) {
mTopPadding = top - above;
}
if (includepad) {
above = top;
}
}
if (last) {
if (trackpad) {
mBottomPadding = bottom - below;
}
if (includepad) {
below = bottom;
}
}
int extra;
if (needMultiply) {
extra = (int) ((below - above) * (spacingmult - 1)
+ spacingadd + 0.5);
} else {
extra = 0;
}
lines[off + START] = start;
lines[off + TOP] = v;
lines[off + DESCENT] = below + extra;
v += (below - above) + extra;
lines[off + mColumns + START] = end;
lines[off + mColumns + TOP] = v;
if (tab)
lines[off + TAB] |= TAB_MASK;
{
lines[off + DIR] |= dir << DIR_SHIFT;
int cur = Character.DIRECTIONALITY_LEFT_TO_RIGHT;
int count = 0;
if (!easy) {
for (int k = start; k < end; k++) {
if (chdirs[k - pstart] != cur) {
count++;
cur = chdirs[k - pstart];
}
}
}
Directions linedirs;
if (count == 0) {
linedirs = DIRS_ALL_LEFT_TO_RIGHT;
} else {
short[] ld = new short[count + 1];
cur = Character.DIRECTIONALITY_LEFT_TO_RIGHT;
count = 0;
int here = start;
for (int k = start; k < end; k++) {
if (chdirs[k - pstart] != cur) {
// XXX check to make sure we don't
// overflow short
ld[count++] = (short) (k - here);
cur = chdirs[k - pstart];
here = k;
}
}
ld[count] = (short) (end - here);
if (count == 1 && ld[0] == 0) {
linedirs = DIRS_ALL_RIGHT_TO_LEFT;
} else {
linedirs = new Directions(ld);
}
}
mLineDirections[j] = linedirs;
// If ellipsize is in marquee mode, do not apply ellipsis on the first line
if (ellipsize != null && (ellipsize != TextUtils.TruncateAt.MARQUEE || j != 0)) {
calculateEllipsis(start, end, widths, widstart, widoff,
ellipsiswidth, ellipsize, j,
textwidth, paint);
}
}
mLineCount++;
return v;
}
private void calculateEllipsis(int linestart, int lineend,
float[] widths, int widstart, int widoff,
float avail, TextUtils.TruncateAt where,
int line, float textwidth, TextPaint paint) {
int len = lineend - linestart;
if (textwidth <= avail) {
// Everything fits!
mLines[mColumns * line + ELLIPSIS_START] = 0;
mLines[mColumns * line + ELLIPSIS_COUNT] = 0;
return;
}
float ellipsiswid = paint.measureText("\u2026");
int ellipsisStart, ellipsisCount;
if (where == TextUtils.TruncateAt.START) {
float sum = 0;
int i;
for (i = len; i >= 0; i--) {
float w = widths[i - 1 + linestart - widstart + widoff];
if (w + sum + ellipsiswid > avail) {
break;
}
sum += w;
}
ellipsisStart = 0;
ellipsisCount = i;
} else if (where == TextUtils.TruncateAt.END || where == TextUtils.TruncateAt.MARQUEE) {
float sum = 0;
int i;
for (i = 0; i < len; i++) {
float w = widths[i + linestart - widstart + widoff];
if (w + sum + ellipsiswid > avail) {
break;
}
sum += w;
}
ellipsisStart = i;
ellipsisCount = len - i;
} else /* where = TextUtils.TruncateAt.MIDDLE */ {
float lsum = 0, rsum = 0;
int left = 0, right = len;
float ravail = (avail - ellipsiswid) / 2;
for (right = len; right >= 0; right--) {
float w = widths[right - 1 + linestart - widstart + widoff];
if (w + rsum > ravail) {
break;
}
rsum += w;
}
float lavail = avail - ellipsiswid - rsum;
for (left = 0; left < right; left++) {
float w = widths[left + linestart - widstart + widoff];
if (w + lsum > lavail) {
break;
}
lsum += w;
}
ellipsisStart = left;
ellipsisCount = right - left;
}
mLines[mColumns * line + ELLIPSIS_START] = ellipsisStart;
mLines[mColumns * line + ELLIPSIS_COUNT] = ellipsisCount;
}
// Override the baseclass so we can directly access our members,
// rather than relying on member functions.
// The logic mirrors that of Layout.getLineForVertical
// FIXME: It may be faster to do a linear search for layouts without many lines.
public int getLineForVertical(int vertical) {
int high = mLineCount;
int low = -1;
int guess;
int[] lines = mLines;
while (high - low > 1) {
guess = (high + low) >> 1;
if (lines[mColumns * guess + TOP] > vertical){
high = guess;
} else {
low = guess;
}
}
if (low < 0) {
return 0;
} else {
return low;
}
}
public int getLineCount() {
return mLineCount;
}
public int getLineTop(int line) {
return mLines[mColumns * line + TOP];
}
public int getLineDescent(int line) {
return mLines[mColumns * line + DESCENT];
}
public int getLineStart(int line) {
return mLines[mColumns * line + START] & START_MASK;
}
public int getParagraphDirection(int line) {
return mLines[mColumns * line + DIR] >> DIR_SHIFT;
}
public boolean getLineContainsTab(int line) {
return (mLines[mColumns * line + TAB] & TAB_MASK) != 0;
}
public final Directions getLineDirections(int line) {
return mLineDirections[line];
}
public int getTopPadding() {
return mTopPadding;
}
public int getBottomPadding() {
return mBottomPadding;
}
@Override
public int getEllipsisCount(int line) {
if (mColumns < COLUMNS_ELLIPSIZE) {
return 0;
}
return mLines[mColumns * line + ELLIPSIS_COUNT];
}
@Override
public int getEllipsisStart(int line) {
if (mColumns < COLUMNS_ELLIPSIZE) {
return 0;
}
return mLines[mColumns * line + ELLIPSIS_START];
}
@Override
public int getEllipsizedWidth() {
return mEllipsizedWidth;
}
private int mLineCount;
private int mTopPadding, mBottomPadding;
private int mColumns;
private int mEllipsizedWidth;
private static final int COLUMNS_NORMAL = 3;
private static final int COLUMNS_ELLIPSIZE = 5;
private static final int START = 0;
private static final int DIR = START;
private static final int TAB = START;
private static final int TOP = 1;
private static final int DESCENT = 2;
private static final int ELLIPSIS_START = 3;
private static final int ELLIPSIS_COUNT = 4;
private int[] mLines;
private Directions[] mLineDirections;
private static final int START_MASK = 0x1FFFFFFF;
private static final int DIR_MASK = 0xC0000000;
private static final int DIR_SHIFT = 30;
private static final int TAB_MASK = 0x20000000;
private static final char FIRST_RIGHT_TO_LEFT = '\u0590';
/*
* These are reused across calls to generate()
*/
private byte[] mChdirs;
private char[] mChs;
private float[] mWidths;
private Paint.FontMetricsInt mFontMetricsInt = new Paint.FontMetricsInt();
}
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