Examples with MetricAffectingSpan android.text.style.MetricAffectingSpan used on opensource projects

Example 11 with MetricAffectingSpan

use of android.text.style.MetricAffectingSpan in project android_frameworks_base by crdroidandroid.

the class TextLine method handleRun.

/**
     * Utility function for handling a unidirectional run.  The run must not
     * contain tabs 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) {
            expandMetricsFromPaint(fmi, wp);
        }
        return 0f;
    }
    if (mSpanned == null) {
        TextPaint wp = mWorkPaint;
        wp.set(mPaint);
        final int mlimit = measureLimit;
        return handleText(wp, start, limit, start, limit, runIsRtl, c, x, top, y, bottom, fmi, needWidth || mlimit < measureLimit, mlimit);
    }
    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++) {
            // 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 + inext) - mStart;
            int offset = Math.min(jnext, mlimit);
            wp.set(mPaint);
            for (int k = 0; k < mCharacterStyleSpanSet.numberOfSpans; k++) {
                // Intentionally using >= and <= as explained above
                if ((mCharacterStyleSpanSet.spanStarts[k] >= mStart + offset) || (mCharacterStyleSpanSet.spanEnds[k] <= mStart + j))
                    continue;
                CharacterStyle span = mCharacterStyleSpanSet.spans[k];
                span.updateDrawState(wp);
            }
            // Only draw hyphen on last run in line
            if (jnext < mLen) {
                wp.setHyphenEdit(0);
            }
            x += handleText(wp, j, jnext, i, inext, runIsRtl, c, x, top, y, bottom, fmi, needWidth || jnext < measureLimit, offset);
        }
    }
    return x - originalX;
}

Example 12 with MetricAffectingSpan

use of android.text.style.MetricAffectingSpan in project android_frameworks_base by DirtyUnicorns.

the class TextLine method handleRun.

/**
     * Utility function for handling a unidirectional run.  The run must not
     * contain tabs 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) {
            expandMetricsFromPaint(fmi, wp);
        }
        return 0f;
    }
    if (mSpanned == null) {
        TextPaint wp = mWorkPaint;
        wp.set(mPaint);
        final int mlimit = measureLimit;
        return handleText(wp, start, limit, start, limit, runIsRtl, c, x, top, y, bottom, fmi, needWidth || mlimit < measureLimit, mlimit);
    }
    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++) {
            // 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 + inext) - mStart;
            int offset = Math.min(jnext, mlimit);
            wp.set(mPaint);
            for (int k = 0; k < mCharacterStyleSpanSet.numberOfSpans; k++) {
                // Intentionally using >= and <= as explained above
                if ((mCharacterStyleSpanSet.spanStarts[k] >= mStart + offset) || (mCharacterStyleSpanSet.spanEnds[k] <= mStart + j))
                    continue;
                CharacterStyle span = mCharacterStyleSpanSet.spans[k];
                span.updateDrawState(wp);
            }
            // Only draw hyphen on last run in line
            if (jnext < mLen) {
                wp.setHyphenEdit(0);
            }
            x += handleText(wp, j, jnext, i, inext, runIsRtl, c, x, top, y, bottom, fmi, needWidth || jnext < measureLimit, offset);
        }
    }
    return x - originalX;
}

Example 13 with MetricAffectingSpan

use of android.text.style.MetricAffectingSpan in project android_frameworks_base by DirtyUnicorns.

the class TextLine method getOffsetBeforeAfter.

/**
     * Returns the next valid offset within this directional run, skipping
     * conjuncts and zero-width characters.  This should not be called to walk
     * off the end of the line, since the returned values might not be valid
     * on neighboring lines.  If the returned offset is less than zero or
     * greater than the line length, the offset should be recomputed on the
     * preceding or following line, respectively.
     *
     * @param runIndex the run index
     * @param runStart the start of the run
     * @param runLimit the limit of the run
     * @param runIsRtl true if the run is right-to-left
     * @param offset the offset
     * @param after true if the new offset should logically follow the provided
     * offset
     * @return the new offset
     */
private int getOffsetBeforeAfter(int runIndex, int runStart, int runLimit, boolean runIsRtl, int offset, boolean after) {
    if (runIndex < 0 || offset == (after ? mLen : 0)) {
        // return accurate values.  These are a guess.
        if (after) {
            return TextUtils.getOffsetAfter(mText, offset + mStart) - mStart;
        }
        return TextUtils.getOffsetBefore(mText, offset + mStart) - mStart;
    }
    TextPaint wp = mWorkPaint;
    wp.set(mPaint);
    int spanStart = runStart;
    int spanLimit;
    if (mSpanned == null) {
        spanLimit = runLimit;
    } else {
        int target = after ? offset + 1 : offset;
        int limit = mStart + runLimit;
        while (true) {
            spanLimit = mSpanned.nextSpanTransition(mStart + spanStart, limit, MetricAffectingSpan.class) - mStart;
            if (spanLimit >= target) {
                break;
            }
            spanStart = spanLimit;
        }
        MetricAffectingSpan[] spans = mSpanned.getSpans(mStart + spanStart, mStart + spanLimit, MetricAffectingSpan.class);
        spans = TextUtils.removeEmptySpans(spans, mSpanned, MetricAffectingSpan.class);
        if (spans.length > 0) {
            ReplacementSpan replacement = null;
            for (int j = 0; j < spans.length; j++) {
                MetricAffectingSpan span = spans[j];
                if (span instanceof ReplacementSpan) {
                    replacement = (ReplacementSpan) span;
                } else {
                    span.updateMeasureState(wp);
                }
            }
            if (replacement != null) {
                // the start or end of this span.
                return after ? spanLimit : spanStart;
            }
        }
    }
    int dir = runIsRtl ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR;
    int cursorOpt = after ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE;
    if (mCharsValid) {
        return wp.getTextRunCursor(mChars, spanStart, spanLimit - spanStart, dir, offset, cursorOpt);
    } else {
        return wp.getTextRunCursor(mText, mStart + spanStart, mStart + spanLimit, dir, mStart + offset, cursorOpt) - mStart;
    }
}

Example 14 with MetricAffectingSpan

use of android.text.style.MetricAffectingSpan in project mongol-library by suragch.

the class MongolTextLine method getOffsetForAdvance.

int getOffsetForAdvance(float advance) {
    Log.i(TAG, "getOffsetForAdvance: " + advance);
    boolean hasSpan = mText instanceof Spanned;
    int offset = 0;
    float oldWidth = 0;
    float newWidth = 0;
    // measure each run and compare sum to advance
    for (TextRun run : mTextRuns) {
        final int start = run.offset;
        final int length = run.length;
        newWidth += run.measuredWidth;
        if (advance >= newWidth) {
            oldWidth = newWidth;
            offset += length;
        } else {
            // overshot so break up the run to the nearest offset
            if (run.isRotated) {
                // choose the closer offset
                if (advance - oldWidth > newWidth - advance) {
                    offset++;
                }
                break;
            }
            TextPaint wp = mWorkPaint;
            wp.set(mPaint);
            if (hasSpan) {
                MetricAffectingSpan[] maSpans = ((Spanned) mText).getSpans(start, start + length, MetricAffectingSpan.class);
                for (MetricAffectingSpan span : maSpans) {
                    span.updateDrawState(wp);
                }
            }
            float[] measuredWidth = new float[1];
            float maxWidth = advance - oldWidth;
            int charactersMeasured = wp.breakText(mText, start, start + length, true, maxWidth, measuredWidth);
            offset += charactersMeasured;
            newWidth = oldWidth + measuredWidth[0];
            int nextCharIndex = start + charactersMeasured;
            float widthOfNextChar = wp.measureText(mText, nextCharIndex, nextCharIndex + 1);
            // choose the closer offset
            if (advance - newWidth > newWidth + widthOfNextChar - advance) {
                offset++;
            }
            break;
        }
    }
    return offset;
}

Example 15 with MetricAffectingSpan

use of android.text.style.MetricAffectingSpan in project android_frameworks_base by ParanoidAndroid.

the class TextLine method handleRun.

/**
     * 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) {
            expandMetricsFromPaint(fmi, wp);
        }
        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++) {
            // 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;
}