private void icUpdateGecko(boolean force) {
// Skip if receiving a repeated request, or
// if suppressing compositions during text selection.
if ((!force && mIcUpdateSeqno == mLastIcUpdateSeqno) || mSuppressCompositions) {
if (DEBUG) {
Log.d(LOGTAG, "icUpdateGecko() skipped");
}
return;
}
mLastIcUpdateSeqno = mIcUpdateSeqno;
mActionQueue.syncWithGecko();
if (DEBUG) {
Log.d(LOGTAG, "icUpdateGecko()");
}
final int selStart = mText.getSpanStart(Selection.SELECTION_START);
final int selEnd = mText.getSpanEnd(Selection.SELECTION_END);
int composingStart = mText.length();
int composingEnd = 0;
Object[] spans = mText.getSpans(0, composingStart, Object.class);
for (Object span : spans) {
if ((mText.getSpanFlags(span) & Spanned.SPAN_COMPOSING) != 0) {
composingStart = Math.min(composingStart, mText.getSpanStart(span));
composingEnd = Math.max(composingEnd, mText.getSpanEnd(span));
}
}
if (DEBUG) {
Log.d(LOGTAG, " range = " + composingStart + "-" + composingEnd);
Log.d(LOGTAG, " selection = " + selStart + "-" + selEnd);
}
if (composingStart >= composingEnd) {
if (selStart >= 0 && selEnd >= 0) {
onImeSetSelection(selStart, selEnd);
} else {
onImeRemoveComposition();
}
return;
}
if (selEnd >= composingStart && selEnd <= composingEnd) {
onImeAddCompositionRange(
selEnd - composingStart,
selEnd - composingStart,
IME_RANGE_CARETPOSITION,
0,
0,
false,
0,
0,
0);
}
int rangeStart = composingStart;
TextPaint tp = new TextPaint();
TextPaint emptyTp = new TextPaint();
// set initial foreground color to 0, because we check for tp.getColor() == 0
// below to decide whether to pass a foreground color to Gecko
emptyTp.setColor(0);
do {
int rangeType, rangeStyles = 0, rangeLineStyle = IME_RANGE_LINE_NONE;
boolean rangeBoldLine = false;
int rangeForeColor = 0, rangeBackColor = 0, rangeLineColor = 0;
int rangeEnd = mText.nextSpanTransition(rangeStart, composingEnd, Object.class);
if (selStart > rangeStart && selStart < rangeEnd) {
rangeEnd = selStart;
} else if (selEnd > rangeStart && selEnd < rangeEnd) {
rangeEnd = selEnd;
}
CharacterStyle[] styleSpans = mText.getSpans(rangeStart, rangeEnd, CharacterStyle.class);
if (DEBUG) {
Log.d(LOGTAG, " found " + styleSpans.length + " spans @ " + rangeStart + "-" + rangeEnd);
}
if (styleSpans.length == 0) {
rangeType =
(selStart == rangeStart && selEnd == rangeEnd)
? IME_RANGE_SELECTEDRAWTEXT
: IME_RANGE_RAWINPUT;
} else {
rangeType =
(selStart == rangeStart && selEnd == rangeEnd)
? IME_RANGE_SELECTEDCONVERTEDTEXT
: IME_RANGE_CONVERTEDTEXT;
tp.set(emptyTp);
for (CharacterStyle span : styleSpans) {
span.updateDrawState(tp);
}
int tpUnderlineColor = 0;
float tpUnderlineThickness = 0.0f;
// These TextPaint fields only exist on Android ICS+ and are not in the SDK.
if (Versions.feature14Plus) {
tpUnderlineColor = (Integer) getField(tp, "underlineColor", 0);
tpUnderlineThickness = (Float) getField(tp, "underlineThickness", 0.0f);
}
if (tpUnderlineColor != 0) {
rangeStyles |= IME_RANGE_UNDERLINE | IME_RANGE_LINECOLOR;
rangeLineColor = tpUnderlineColor;
// Approximately translate underline thickness to what Gecko understands
if (tpUnderlineThickness <= 0.5f) {
rangeLineStyle = IME_RANGE_LINE_DOTTED;
} else {
rangeLineStyle = IME_RANGE_LINE_SOLID;
if (tpUnderlineThickness >= 2.0f) {
rangeBoldLine = true;
}
}
} else if (tp.isUnderlineText()) {
rangeStyles |= IME_RANGE_UNDERLINE;
rangeLineStyle = IME_RANGE_LINE_SOLID;
}
if (tp.getColor() != 0) {
rangeStyles |= IME_RANGE_FORECOLOR;
rangeForeColor = tp.getColor();
}
if (tp.bgColor != 0) {
rangeStyles |= IME_RANGE_BACKCOLOR;
rangeBackColor = tp.bgColor;
}
}
onImeAddCompositionRange(
rangeStart - composingStart,
rangeEnd - composingStart,
rangeType,
rangeStyles,
rangeLineStyle,
rangeBoldLine,
rangeForeColor,
rangeBackColor,
rangeLineColor);
rangeStart = rangeEnd;
if (DEBUG) {
Log.d(
LOGTAG,
" added "
+ rangeType
+ " : "
+ Integer.toHexString(rangeStyles)
+ " : "
+ Integer.toHexString(rangeForeColor)
+ " : "
+ Integer.toHexString(rangeBackColor));
}
} while (rangeStart < composingEnd);
onImeUpdateComposition(composingStart, composingEnd);
}
/**
* Utility function for handling a unidirectional run. The run must not contain tabs or emoji but
* can contain styles.
*
* @param start the line-relative start of the run
* @param measureLimit the offset to measure to, between start and limit inclusive
* @param limit the limit of the run
* @param runIsRtl true if the run is right-to-left
* @param c the canvas, can be null
* @param x the end of the run closest to the leading margin
* @param top the top of the line
* @param y the baseline
* @param bottom the bottom of the line
* @param fmi receives metrics information, can be null
* @param needWidth true if the width is required
* @return the signed width of the run based on the run direction; only valid if needWidth is true
*/
private float handleRun(
int start,
int measureLimit,
int limit,
boolean runIsRtl,
Canvas c,
float x,
int top,
int y,
int bottom,
FontMetricsInt fmi,
boolean needWidth) {
// Case of an empty line, make sure we update fmi according to mPaint
if (start == measureLimit) {
TextPaint wp = mWorkPaint;
wp.set(mPaint);
if (fmi != null) {
/// M: new FontMetrics method for complex text support.
expandMetricsFromPaint(fmi, wp, mText);
}
return 0f;
}
if (mSpanned == null) {
TextPaint wp = mWorkPaint;
wp.set(mPaint);
final int mlimit = measureLimit;
return handleText(
wp,
start,
mlimit,
start,
limit,
runIsRtl,
c,
x,
top,
y,
bottom,
fmi,
needWidth || mlimit < measureLimit);
}
mMetricAffectingSpanSpanSet.init(mSpanned, mStart + start, mStart + limit);
mCharacterStyleSpanSet.init(mSpanned, mStart + start, mStart + limit);
// Shaping needs to take into account context up to metric boundaries,
// but rendering needs to take into account character style boundaries.
// So we iterate through metric runs to get metric bounds,
// then within each metric run iterate through character style runs
// for the run bounds.
final float originalX = x;
for (int i = start, inext; i < measureLimit; i = inext) {
TextPaint wp = mWorkPaint;
wp.set(mPaint);
inext = mMetricAffectingSpanSpanSet.getNextTransition(mStart + i, mStart + limit) - mStart;
int mlimit = Math.min(inext, measureLimit);
ReplacementSpan replacement = null;
for (int j = 0; j < mMetricAffectingSpanSpanSet.numberOfSpans; j++) {
// Both intervals [spanStarts..spanEnds] and [mStart + i..mStart + mlimit] are NOT
// empty by construction. This special case in getSpans() explains the >= & <= tests
if ((mMetricAffectingSpanSpanSet.spanStarts[j] >= mStart + mlimit)
|| (mMetricAffectingSpanSpanSet.spanEnds[j] <= mStart + i)) continue;
MetricAffectingSpan span = mMetricAffectingSpanSpanSet.spans[j];
if (span instanceof ReplacementSpan) {
replacement = (ReplacementSpan) span;
} else {
// We might have a replacement that uses the draw
// state, otherwise measure state would suffice.
span.updateDrawState(wp);
}
}
if (replacement != null) {
x +=
handleReplacement(
replacement,
wp,
i,
mlimit,
runIsRtl,
c,
x,
top,
y,
bottom,
fmi,
needWidth || mlimit < measureLimit);
continue;
}
for (int j = i, jnext; j < mlimit; j = jnext) {
jnext = mCharacterStyleSpanSet.getNextTransition(mStart + j, mStart + mlimit) - mStart;
wp.set(mPaint);
for (int k = 0; k < mCharacterStyleSpanSet.numberOfSpans; k++) {
// Intentionally using >= and <= as explained above
if ((mCharacterStyleSpanSet.spanStarts[k] >= mStart + jnext)
|| (mCharacterStyleSpanSet.spanEnds[k] <= mStart + j)) continue;
CharacterStyle span = mCharacterStyleSpanSet.spans[k];
span.updateDrawState(wp);
}
x +=
handleText(
wp,
j,
jnext,
i,
inext,
runIsRtl,
c,
x,
top,
y,
bottom,
fmi,
needWidth || jnext < measureLimit);
}
}
return x - originalX;
}
/**
* Draws and/or measures a uniform run of text on a single line. No span of interest should start
* or end in the middle of this run (if not drawing, character spans that don't affect metrics can
* be ignored). Neither should the run direction change in the middle of the run.
*
* <p>
*
* <p>The x position is the leading edge of the text. In a right-to-left paragraph, this will be
* to the right of the text to be drawn. Paint should not have an Align value other than LEFT or
* positioning will isCancelled confused.
*
* <p>
*
* <p>On return, workPaint will reflect the original paint plus any modifications made by
* character styles on the run.
*
* <p>
*
* <p>The returned width is signed and will be < 0 if the paragraph direction is right-to-left.
*/
private static float drawUniformRun(
Canvas canvas,
Spanned text,
int start,
int end,
int dir,
boolean runIsRtl,
float x,
int top,
int y,
int bottom,
Paint.FontMetricsInt fmi,
TextPaint paint,
TextPaint workPaint,
boolean needWidth) {
boolean haveWidth = false;
float ret = 0;
CharacterStyle[] spans = text.getSpans(start, end, CharacterStyle.class);
ReplacementSpan replacement = null;
// XXX: This shouldn't be modifying paint, only workPaint.
// However, the members belonging to TextPaint should have default
// values anyway. Better to ensure this in the Layout constructor.
paint.bgColor = 0;
paint.baselineShift = 0;
workPaint.set(paint);
if (spans.length > 0) {
for (CharacterStyle span : spans) {
if (span instanceof ReplacementSpan) {
replacement = (ReplacementSpan) span;
} else {
span.updateDrawState(workPaint);
}
}
}
if (replacement == null) {
CharSequence tmp;
int tmpstart, tmpend;
if (runIsRtl) {
tmp = TextUtils.getReverse(text, start, end);
tmpstart = 0;
// XXX: assumes getReverse doesn't change the length of the text
tmpend = end - start;
} else {
tmp = text;
tmpstart = start;
tmpend = end;
}
if (fmi != null) {
workPaint.getFontMetricsInt(fmi);
}
if (canvas != null) {
if (workPaint.bgColor != 0) {
int c = workPaint.getColor();
Paint.Style s = workPaint.getStyle();
workPaint.setColor(workPaint.bgColor);
workPaint.setStyle(Paint.Style.FILL);
if (!haveWidth) {
ret = workPaint.measureText(tmp, tmpstart, tmpend);
haveWidth = true;
}
if (dir == Layout.DIR_RIGHT_TO_LEFT) {
canvas.drawRect(x - ret, top, x, bottom, workPaint);
} else {
canvas.drawRect(x, top, x + ret, bottom, workPaint);
}
workPaint.setStyle(s);
workPaint.setColor(c);
}
if (dir == Layout.DIR_RIGHT_TO_LEFT) {
if (!haveWidth) {
ret = workPaint.measureText(tmp, tmpstart, tmpend);
haveWidth = true;
}
canvas.drawText(tmp, tmpstart, tmpend, x - ret, y + workPaint.baselineShift, workPaint);
} else {
if (needWidth) {
if (!haveWidth) {
ret = workPaint.measureText(tmp, tmpstart, tmpend);
haveWidth = true;
}
}
canvas.drawText(tmp, tmpstart, tmpend, x, y + workPaint.baselineShift, workPaint);
}
} else {
if (needWidth && !haveWidth) {
ret = workPaint.measureText(tmp, tmpstart, tmpend);
haveWidth = true;
}
}
} else {
ret = replacement.getSize(workPaint, text, start, end, fmi);
if (canvas != null) {
if (dir == Layout.DIR_RIGHT_TO_LEFT) {
replacement.draw(canvas, text, start, end, x - ret, top, y, bottom, workPaint);
} else {
replacement.draw(canvas, text, start, end, x, top, y, bottom, workPaint);
}
}
}
if (dir == Layout.DIR_RIGHT_TO_LEFT) {
return -ret;
} else {
return ret;
}
}