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

Example 6 with LeadingMarginSpan

use of android.text.style.LeadingMarginSpan in project XobotOS by xamarin.

the class StaticLayout method generate.

/* package */
void generate(CharSequence source, int bufStart, int bufEnd, TextPaint paint, int outerWidth, Alignment align, TextDirectionHeuristic textDir, float spacingmult, float spacingadd, boolean includepad, boolean trackpad, float ellipsizedWidth, TextUtils.TruncateAt ellipsize) {
    mLineCount = 0;
    int v = 0;
    boolean needMultiply = (spacingmult != 1 || spacingadd != 0);
    Paint.FontMetricsInt fm = mFontMetricsInt;
    int[] chooseHtv = null;
    MeasuredText measured = mMeasured;
    Spanned spanned = null;
    if (source instanceof Spanned)
        spanned = (Spanned) source;
    // XXX
    int DEFAULT_DIR = DIR_LEFT_TO_RIGHT;
    int paraEnd;
    for (int paraStart = bufStart; paraStart <= bufEnd; paraStart = paraEnd) {
        paraEnd = TextUtils.indexOf(source, CHAR_NEW_LINE, paraStart, bufEnd);
        if (paraEnd < 0)
            paraEnd = bufEnd;
        else
            paraEnd++;
        int firstWidthLineLimit = mLineCount + 1;
        int firstWidth = outerWidth;
        int restWidth = outerWidth;
        LineHeightSpan[] chooseHt = null;
        if (spanned != null) {
            LeadingMarginSpan[] sp = getParagraphSpans(spanned, paraStart, paraEnd, LeadingMarginSpan.class);
            for (int i = 0; i < sp.length; i++) {
                LeadingMarginSpan lms = sp[i];
                firstWidth -= sp[i].getLeadingMargin(true);
                restWidth -= sp[i].getLeadingMargin(false);
                // paragraph.
                if (lms instanceof LeadingMarginSpan2) {
                    LeadingMarginSpan2 lms2 = (LeadingMarginSpan2) lms;
                    int lmsFirstLine = getLineForOffset(spanned.getSpanStart(lms2));
                    firstWidthLineLimit = lmsFirstLine + lms2.getLeadingMarginLineCount();
                }
            }
            chooseHt = getParagraphSpans(spanned, paraStart, paraEnd, 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 < paraStart) {
                        // starts in this layout, before the
                        // current paragraph
                        chooseHtv[i] = getLineTop(getLineForOffset(o));
                    } else {
                        // starts in this paragraph
                        chooseHtv[i] = v;
                    }
                }
            }
        }
        measured.setPara(source, paraStart, paraEnd, textDir);
        char[] chs = measured.mChars;
        float[] widths = measured.mWidths;
        byte[] chdirs = measured.mLevels;
        int dir = measured.mDir;
        boolean easy = measured.mEasy;
        int width = firstWidth;
        float w = 0;
        int here = paraStart;
        int ok = paraStart;
        float okWidth = w;
        int okAscent = 0, okDescent = 0, okTop = 0, okBottom = 0;
        int fit = paraStart;
        float fitWidth = w;
        int fitAscent = 0, fitDescent = 0, fitTop = 0, fitBottom = 0;
        boolean hasTabOrEmoji = false;
        boolean hasTab = false;
        TabStops tabStops = null;
        for (int spanStart = paraStart, spanEnd = spanStart, nextSpanStart; spanStart < paraEnd; spanStart = nextSpanStart) {
            if (spanStart == spanEnd) {
                if (spanned == null)
                    spanEnd = paraEnd;
                else
                    spanEnd = spanned.nextSpanTransition(spanStart, paraEnd, MetricAffectingSpan.class);
                int spanLen = spanEnd - spanStart;
                if (spanned == null) {
                    measured.addStyleRun(paint, spanLen, fm);
                } else {
                    MetricAffectingSpan[] spans = spanned.getSpans(spanStart, spanEnd, MetricAffectingSpan.class);
                    spans = TextUtils.removeEmptySpans(spans, spanned, MetricAffectingSpan.class);
                    measured.addStyleRun(paint, spans, spanLen, fm);
                }
            }
            nextSpanStart = spanEnd;
            int fmTop = fm.top;
            int fmBottom = fm.bottom;
            int fmAscent = fm.ascent;
            int fmDescent = fm.descent;
            for (int j = spanStart; j < spanEnd; j++) {
                char c = chs[j - paraStart];
                if (c == CHAR_NEW_LINE) {
                // intentionally left empty
                } else if (c == CHAR_TAB) {
                    if (hasTab == false) {
                        hasTab = true;
                        hasTabOrEmoji = true;
                        if (spanned != null) {
                            // First tab this para, check for tabstops
                            TabStopSpan[] spans = getParagraphSpans(spanned, paraStart, paraEnd, TabStopSpan.class);
                            if (spans.length > 0) {
                                tabStops = new TabStops(TAB_INCREMENT, spans);
                            }
                        }
                    }
                    if (tabStops != null) {
                        w = tabStops.nextTab(w);
                    } else {
                        w = TabStops.nextDefaultStop(w, TAB_INCREMENT);
                    }
                } else if (c >= CHAR_FIRST_HIGH_SURROGATE && c <= CHAR_LAST_LOW_SURROGATE && j + 1 < spanEnd) {
                    int emoji = Character.codePointAt(chs, j - paraStart);
                    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 = bm.getWidth() * -whichPaint.ascent() / bm.getHeight();
                            w += wid;
                            hasTabOrEmoji = true;
                            j++;
                        } else {
                            w += widths[j - paraStart];
                        }
                    } else {
                        w += widths[j - paraStart];
                    }
                } else {
                    w += widths[j - paraStart];
                }
                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;
                    if (c == CHAR_SPACE || c == CHAR_TAB || ((c == CHAR_DOT || c == CHAR_COMMA || c == CHAR_COLON || c == CHAR_SEMICOLON) && (j - 1 < here || !Character.isDigit(chs[j - 1 - paraStart])) && (j + 1 >= spanEnd || !Character.isDigit(chs[j + 1 - paraStart]))) || ((c == CHAR_SLASH || c == CHAR_HYPHEN) && (j + 1 >= spanEnd || !Character.isDigit(chs[j + 1 - paraStart]))) || (c >= CHAR_FIRST_CJK && isIdeographic(c, true) && j + 1 < spanEnd && isIdeographic(chs[j + 1 - paraStart], 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 {
                    final boolean moreChars = (j + 1 < spanEnd);
                    if (ok != here) {
                        while (ok < spanEnd && chs[ok - paraStart] == CHAR_SPACE) {
                            ok++;
                        }
                        v = out(source, here, ok, okAscent, okDescent, okTop, okBottom, v, spacingmult, spacingadd, chooseHt, chooseHtv, fm, hasTabOrEmoji, needMultiply, paraStart, chdirs, dir, easy, ok == bufEnd, includepad, trackpad, chs, widths, paraStart, ellipsize, ellipsizedWidth, okWidth, paint, moreChars);
                        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, hasTabOrEmoji, needMultiply, paraStart, chdirs, dir, easy, fit == bufEnd, includepad, trackpad, chs, widths, paraStart, ellipsize, ellipsizedWidth, fitWidth, paint, moreChars);
                        here = fit;
                    } else {
                        // Log.e("text", "output one " + here + " to " +(here + 1));
                        // XXX not sure why the existing fm wasn't ok.
                        // 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, hasTabOrEmoji, needMultiply, paraStart, chdirs, dir, easy, here + 1 == bufEnd, includepad, trackpad, chs, widths, paraStart, ellipsize, ellipsizedWidth, widths[here - paraStart], paint, moreChars);
                        here = here + 1;
                    }
                    if (here < spanStart) {
                        // didn't output all the text for this span
                        // we've measured the raw widths, though, so
                        // just reset the start point
                        j = nextSpanStart = here;
                    } else {
                        // continue looping
                        j = here - 1;
                    }
                    ok = fit = here;
                    w = 0;
                    fitAscent = fitDescent = fitTop = fitBottom = 0;
                    okAscent = okDescent = okTop = okBottom = 0;
                    if (--firstWidthLineLimit <= 0) {
                        width = restWidth;
                    }
                }
                if (mLineCount >= mMaximumVisibleLineCount) {
                    break;
                }
            }
        }
        if (paraEnd != here && mLineCount < mMaximumVisibleLineCount) {
            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, paraEnd, fitAscent, fitDescent, fitTop, fitBottom, v, spacingmult, spacingadd, chooseHt, chooseHtv, fm, hasTabOrEmoji, needMultiply, paraStart, chdirs, dir, easy, paraEnd == bufEnd, includepad, trackpad, chs, widths, paraStart, ellipsize, ellipsizedWidth, w, paint, paraEnd != bufEnd);
        }
        paraStart = paraEnd;
        if (paraEnd == bufEnd)
            break;
    }
    if ((bufEnd == bufStart || source.charAt(bufEnd - 1) == CHAR_NEW_LINE) && mLineCount < mMaximumVisibleLineCount) {
        // 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, null, DEFAULT_DIR, true, true, includepad, trackpad, null, null, bufStart, ellipsize, ellipsizedWidth, 0, paint, false);
    }
}

Example 7 with LeadingMarginSpan

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

the class Layout method drawText.

/**
     * @hide
     */
public void drawText(Canvas canvas, int firstLine, int lastLine) {
    int previousLineBottom = getLineTop(firstLine);
    int previousLineEnd = getLineStart(firstLine);
    ParagraphStyle[] spans = NO_PARA_SPANS;
    int spanEnd = 0;
    TextPaint paint = mPaint;
    CharSequence buf = mText;
    Alignment paraAlign = mAlignment;
    TabStops tabStops = null;
    boolean tabStopsIsInitialized = false;
    TextLine tl = TextLine.obtain();
    // The baseline is the top of the following line minus the current line's descent.
    for (int lineNum = firstLine; lineNum <= lastLine; lineNum++) {
        int start = previousLineEnd;
        previousLineEnd = getLineStart(lineNum + 1);
        int end = getLineVisibleEnd(lineNum, start, previousLineEnd);
        int ltop = previousLineBottom;
        int lbottom = getLineTop(lineNum + 1);
        previousLineBottom = lbottom;
        int lbaseline = lbottom - getLineDescent(lineNum);
        int dir = getParagraphDirection(lineNum);
        int left = 0;
        int right = mWidth;
        if (mSpannedText) {
            Spanned sp = (Spanned) buf;
            int textLength = buf.length();
            boolean isFirstParaLine = (start == 0 || buf.charAt(start - 1) == '\n');
            // our problem.
            if (start >= spanEnd && (lineNum == firstLine || isFirstParaLine)) {
                spanEnd = sp.nextSpanTransition(start, textLength, ParagraphStyle.class);
                spans = getParagraphSpans(sp, start, spanEnd, ParagraphStyle.class);
                paraAlign = mAlignment;
                for (int n = spans.length - 1; n >= 0; n--) {
                    if (spans[n] instanceof AlignmentSpan) {
                        paraAlign = ((AlignmentSpan) spans[n]).getAlignment();
                        break;
                    }
                }
                tabStopsIsInitialized = false;
            }
            // Draw all leading margin spans.  Adjust left or right according
            // to the paragraph direction of the line.
            final int length = spans.length;
            boolean useFirstLineMargin = isFirstParaLine;
            for (int n = 0; n < length; n++) {
                if (spans[n] instanceof LeadingMarginSpan2) {
                    int count = ((LeadingMarginSpan2) spans[n]).getLeadingMarginLineCount();
                    int startLine = getLineForOffset(sp.getSpanStart(spans[n]));
                    // the count that is greatest
                    if (lineNum < startLine + count) {
                        useFirstLineMargin = true;
                        break;
                    }
                }
            }
            for (int n = 0; n < length; n++) {
                if (spans[n] instanceof LeadingMarginSpan) {
                    LeadingMarginSpan margin = (LeadingMarginSpan) spans[n];
                    if (dir == DIR_RIGHT_TO_LEFT) {
                        margin.drawLeadingMargin(canvas, paint, right, dir, ltop, lbaseline, lbottom, buf, start, end, isFirstParaLine, this);
                        right -= margin.getLeadingMargin(useFirstLineMargin);
                    } else {
                        margin.drawLeadingMargin(canvas, paint, left, dir, ltop, lbaseline, lbottom, buf, start, end, isFirstParaLine, this);
                        left += margin.getLeadingMargin(useFirstLineMargin);
                    }
                }
            }
        }
        boolean hasTab = getLineContainsTab(lineNum);
        // Can't tell if we have tabs for sure, currently
        if (hasTab && !tabStopsIsInitialized) {
            if (tabStops == null) {
                tabStops = new TabStops(TAB_INCREMENT, spans);
            } else {
                tabStops.reset(TAB_INCREMENT, spans);
            }
            tabStopsIsInitialized = true;
        }
        // Determine whether the line aligns to normal, opposite, or center.
        Alignment align = paraAlign;
        if (align == Alignment.ALIGN_LEFT) {
            align = (dir == DIR_LEFT_TO_RIGHT) ? Alignment.ALIGN_NORMAL : Alignment.ALIGN_OPPOSITE;
        } else if (align == Alignment.ALIGN_RIGHT) {
            align = (dir == DIR_LEFT_TO_RIGHT) ? Alignment.ALIGN_OPPOSITE : Alignment.ALIGN_NORMAL;
        }
        int x;
        if (align == Alignment.ALIGN_NORMAL) {
            if (dir == DIR_LEFT_TO_RIGHT) {
                x = left + getIndentAdjust(lineNum, Alignment.ALIGN_LEFT);
            } else {
                x = right + getIndentAdjust(lineNum, Alignment.ALIGN_RIGHT);
            }
        } else {
            int max = (int) getLineExtent(lineNum, tabStops, false);
            if (align == Alignment.ALIGN_OPPOSITE) {
                if (dir == DIR_LEFT_TO_RIGHT) {
                    x = right - max + getIndentAdjust(lineNum, Alignment.ALIGN_RIGHT);
                } else {
                    x = left - max + getIndentAdjust(lineNum, Alignment.ALIGN_LEFT);
                }
            } else {
                // Alignment.ALIGN_CENTER
                max = max & ~1;
                x = ((right + left - max) >> 1) + getIndentAdjust(lineNum, Alignment.ALIGN_CENTER);
            }
        }
        paint.setHyphenEdit(getHyphen(lineNum));
        Directions directions = getLineDirections(lineNum);
        if (directions == DIRS_ALL_LEFT_TO_RIGHT && !mSpannedText && !hasTab) {
            // XXX: assumes there's nothing additional to be done
            canvas.drawText(buf, start, end, x, lbaseline, paint);
        } else {
            tl.set(paint, buf, start, end, dir, directions, hasTab, tabStops);
            tl.draw(canvas, x, ltop, lbaseline, lbottom);
        }
        paint.setHyphenEdit(0);
    }
    TextLine.recycle(tl);
}

Example 8 with LeadingMarginSpan

use of android.text.style.LeadingMarginSpan in project android_frameworks_base by AOSPA.

the class Layout method measurePara.

/* package */
static float measurePara(TextPaint paint, CharSequence text, int start, int end) {
    MeasuredText mt = MeasuredText.obtain();
    TextLine tl = TextLine.obtain();
    try {
        mt.setPara(text, start, end, TextDirectionHeuristics.LTR, null);
        Directions directions;
        int dir;
        if (mt.mEasy) {
            directions = DIRS_ALL_LEFT_TO_RIGHT;
            dir = Layout.DIR_LEFT_TO_RIGHT;
        } else {
            directions = AndroidBidi.directions(mt.mDir, mt.mLevels, 0, mt.mChars, 0, mt.mLen);
            dir = mt.mDir;
        }
        char[] chars = mt.mChars;
        int len = mt.mLen;
        boolean hasTabs = false;
        TabStops tabStops = null;
        // leading margins should be taken into account when measuring a paragraph
        int margin = 0;
        if (text instanceof Spanned) {
            Spanned spanned = (Spanned) text;
            LeadingMarginSpan[] spans = getParagraphSpans(spanned, start, end, LeadingMarginSpan.class);
            for (LeadingMarginSpan lms : spans) {
                margin += lms.getLeadingMargin(true);
            }
        }
        for (int i = 0; i < len; ++i) {
            if (chars[i] == '\t') {
                hasTabs = true;
                if (text instanceof Spanned) {
                    Spanned spanned = (Spanned) text;
                    int spanEnd = spanned.nextSpanTransition(start, end, TabStopSpan.class);
                    TabStopSpan[] spans = getParagraphSpans(spanned, start, spanEnd, TabStopSpan.class);
                    if (spans.length > 0) {
                        tabStops = new TabStops(TAB_INCREMENT, spans);
                    }
                }
                break;
            }
        }
        tl.set(paint, text, start, end, dir, directions, hasTabs, tabStops);
        return margin + tl.metrics(null);
    } finally {
        TextLine.recycle(tl);
        MeasuredText.recycle(mt);
    }
}

Example 9 with LeadingMarginSpan

use of android.text.style.LeadingMarginSpan in project android_frameworks_base by ResurrectionRemix.

the class StaticLayout method generate.

/* package */
void generate(Builder b, boolean includepad, boolean trackpad) {
    CharSequence source = b.mText;
    int bufStart = b.mStart;
    int bufEnd = b.mEnd;
    TextPaint paint = b.mPaint;
    int outerWidth = b.mWidth;
    TextDirectionHeuristic textDir = b.mTextDir;
    float spacingmult = b.mSpacingMult;
    float spacingadd = b.mSpacingAdd;
    float ellipsizedWidth = b.mEllipsizedWidth;
    TextUtils.TruncateAt ellipsize = b.mEllipsize;
    // TODO: move to builder to avoid allocation costs
    LineBreaks lineBreaks = new LineBreaks();
    // store span end locations
    int[] spanEndCache = new int[4];
    // store fontMetrics per span range
    // must be a multiple of 4 (and > 0) (store top, bottom, ascent, and descent per range)
    int[] fmCache = new int[4 * 4];
    // TODO: also respect LocaleSpan within the text
    b.setLocale(paint.getTextLocale());
    mLineCount = 0;
    int v = 0;
    boolean needMultiply = (spacingmult != 1 || spacingadd != 0);
    Paint.FontMetricsInt fm = b.mFontMetricsInt;
    int[] chooseHtv = null;
    MeasuredText measured = b.mMeasuredText;
    Spanned spanned = null;
    if (source instanceof Spanned)
        spanned = (Spanned) source;
    int paraEnd;
    for (int paraStart = bufStart; paraStart <= bufEnd; paraStart = paraEnd) {
        paraEnd = TextUtils.indexOf(source, CHAR_NEW_LINE, paraStart, bufEnd);
        if (paraEnd < 0)
            paraEnd = bufEnd;
        else
            paraEnd++;
        int firstWidthLineCount = 1;
        int firstWidth = outerWidth;
        int restWidth = outerWidth;
        LineHeightSpan[] chooseHt = null;
        if (spanned != null) {
            LeadingMarginSpan[] sp = getParagraphSpans(spanned, paraStart, paraEnd, LeadingMarginSpan.class);
            for (int i = 0; i < sp.length; i++) {
                LeadingMarginSpan lms = sp[i];
                firstWidth -= sp[i].getLeadingMargin(true);
                restWidth -= sp[i].getLeadingMargin(false);
                // leading margin spans, not just this particular one
                if (lms instanceof LeadingMarginSpan2) {
                    LeadingMarginSpan2 lms2 = (LeadingMarginSpan2) lms;
                    firstWidthLineCount = Math.max(firstWidthLineCount, lms2.getLeadingMarginLineCount());
                }
            }
            chooseHt = getParagraphSpans(spanned, paraStart, paraEnd, LineHeightSpan.class);
            if (chooseHt.length == 0) {
                // So that out() would not assume it has any contents
                chooseHt = null;
            } else {
                if (chooseHtv == null || chooseHtv.length < chooseHt.length) {
                    chooseHtv = ArrayUtils.newUnpaddedIntArray(chooseHt.length);
                }
                for (int i = 0; i < chooseHt.length; i++) {
                    int o = spanned.getSpanStart(chooseHt[i]);
                    if (o < paraStart) {
                        // starts in this layout, before the
                        // current paragraph
                        chooseHtv[i] = getLineTop(getLineForOffset(o));
                    } else {
                        // starts in this paragraph
                        chooseHtv[i] = v;
                    }
                }
            }
        }
        measured.setPara(source, paraStart, paraEnd, textDir, b);
        char[] chs = measured.mChars;
        float[] widths = measured.mWidths;
        byte[] chdirs = measured.mLevels;
        int dir = measured.mDir;
        boolean easy = measured.mEasy;
        // tab stop locations
        int[] variableTabStops = null;
        if (spanned != null) {
            TabStopSpan[] spans = getParagraphSpans(spanned, paraStart, paraEnd, TabStopSpan.class);
            if (spans.length > 0) {
                int[] stops = new int[spans.length];
                for (int i = 0; i < spans.length; i++) {
                    stops[i] = spans[i].getTabStop();
                }
                Arrays.sort(stops, 0, stops.length);
                variableTabStops = stops;
            }
        }
        nSetupParagraph(b.mNativePtr, chs, paraEnd - paraStart, firstWidth, firstWidthLineCount, restWidth, variableTabStops, TAB_INCREMENT, b.mBreakStrategy, b.mHyphenationFrequency);
        if (mLeftIndents != null || mRightIndents != null) {
            // TODO(raph) performance: it would be better to do this once per layout rather
            // than once per paragraph, but that would require a change to the native
            // interface.
            int leftLen = mLeftIndents == null ? 0 : mLeftIndents.length;
            int rightLen = mRightIndents == null ? 0 : mRightIndents.length;
            int indentsLen = Math.max(1, Math.max(leftLen, rightLen) - mLineCount);
            int[] indents = new int[indentsLen];
            for (int i = 0; i < indentsLen; i++) {
                int leftMargin = mLeftIndents == null ? 0 : mLeftIndents[Math.min(i + mLineCount, leftLen - 1)];
                int rightMargin = mRightIndents == null ? 0 : mRightIndents[Math.min(i + mLineCount, rightLen - 1)];
                indents[i] = leftMargin + rightMargin;
            }
            nSetIndents(b.mNativePtr, indents);
        }
        // measurement has to be done before performing line breaking
        // but we don't want to recompute fontmetrics or span ranges the
        // second time, so we cache those and then use those stored values
        int fmCacheCount = 0;
        int spanEndCacheCount = 0;
        for (int spanStart = paraStart, spanEnd; spanStart < paraEnd; spanStart = spanEnd) {
            if (fmCacheCount * 4 >= fmCache.length) {
                int[] grow = new int[fmCacheCount * 4 * 2];
                System.arraycopy(fmCache, 0, grow, 0, fmCacheCount * 4);
                fmCache = grow;
            }
            if (spanEndCacheCount >= spanEndCache.length) {
                int[] grow = new int[spanEndCacheCount * 2];
                System.arraycopy(spanEndCache, 0, grow, 0, spanEndCacheCount);
                spanEndCache = grow;
            }
            if (spanned == null) {
                spanEnd = paraEnd;
                int spanLen = spanEnd - spanStart;
                measured.addStyleRun(paint, spanLen, fm);
            } else {
                spanEnd = spanned.nextSpanTransition(spanStart, paraEnd, MetricAffectingSpan.class);
                int spanLen = spanEnd - spanStart;
                MetricAffectingSpan[] spans = spanned.getSpans(spanStart, spanEnd, MetricAffectingSpan.class);
                spans = TextUtils.removeEmptySpans(spans, spanned, MetricAffectingSpan.class);
                measured.addStyleRun(paint, spans, spanLen, fm);
            }
            // the order of storage here (top, bottom, ascent, descent) has to match the code below
            // where these values are retrieved
            fmCache[fmCacheCount * 4 + 0] = fm.top;
            fmCache[fmCacheCount * 4 + 1] = fm.bottom;
            fmCache[fmCacheCount * 4 + 2] = fm.ascent;
            fmCache[fmCacheCount * 4 + 3] = fm.descent;
            fmCacheCount++;
            spanEndCache[spanEndCacheCount] = spanEnd;
            spanEndCacheCount++;
        }
        nGetWidths(b.mNativePtr, widths);
        int breakCount = nComputeLineBreaks(b.mNativePtr, lineBreaks, lineBreaks.breaks, lineBreaks.widths, lineBreaks.flags, lineBreaks.breaks.length);
        int[] breaks = lineBreaks.breaks;
        float[] lineWidths = lineBreaks.widths;
        int[] flags = lineBreaks.flags;
        final int remainingLineCount = mMaximumVisibleLineCount - mLineCount;
        final boolean ellipsisMayBeApplied = ellipsize != null && (ellipsize == TextUtils.TruncateAt.END || (mMaximumVisibleLineCount == 1 && ellipsize != TextUtils.TruncateAt.MARQUEE));
        if (remainingLineCount > 0 && remainingLineCount < breakCount && ellipsisMayBeApplied) {
            // Calculate width and flag.
            float width = 0;
            int flag = 0;
            for (int i = remainingLineCount - 1; i < breakCount; i++) {
                if (i == breakCount - 1) {
                    width += lineWidths[i];
                } else {
                    for (int j = (i == 0 ? 0 : breaks[i - 1]); j < breaks[i]; j++) {
                        width += widths[j];
                    }
                }
                flag |= flags[i] & TAB_MASK;
            }
            // Treat the last line and overflowed lines as a single line.
            breaks[remainingLineCount - 1] = breaks[breakCount - 1];
            lineWidths[remainingLineCount - 1] = width;
            flags[remainingLineCount - 1] = flag;
            breakCount = remainingLineCount;
        }
        // here is the offset of the starting character of the line we are currently measuring
        int here = paraStart;
        int fmTop = 0, fmBottom = 0, fmAscent = 0, fmDescent = 0;
        int fmCacheIndex = 0;
        int spanEndCacheIndex = 0;
        int breakIndex = 0;
        for (int spanStart = paraStart, spanEnd; spanStart < paraEnd; spanStart = spanEnd) {
            // retrieve end of span
            spanEnd = spanEndCache[spanEndCacheIndex++];
            // retrieve cached metrics, order matches above
            fm.top = fmCache[fmCacheIndex * 4 + 0];
            fm.bottom = fmCache[fmCacheIndex * 4 + 1];
            fm.ascent = fmCache[fmCacheIndex * 4 + 2];
            fm.descent = fmCache[fmCacheIndex * 4 + 3];
            fmCacheIndex++;
            if (fm.top < fmTop) {
                fmTop = fm.top;
            }
            if (fm.ascent < fmAscent) {
                fmAscent = fm.ascent;
            }
            if (fm.descent > fmDescent) {
                fmDescent = fm.descent;
            }
            if (fm.bottom > fmBottom) {
                fmBottom = fm.bottom;
            }
            // skip breaks ending before current span range
            while (breakIndex < breakCount && paraStart + breaks[breakIndex] < spanStart) {
                breakIndex++;
            }
            while (breakIndex < breakCount && paraStart + breaks[breakIndex] <= spanEnd) {
                int endPos = paraStart + breaks[breakIndex];
                boolean moreChars = (endPos < bufEnd);
                v = out(source, here, endPos, fmAscent, fmDescent, fmTop, fmBottom, v, spacingmult, spacingadd, chooseHt, chooseHtv, fm, flags[breakIndex], needMultiply, chdirs, dir, easy, bufEnd, includepad, trackpad, chs, widths, paraStart, ellipsize, ellipsizedWidth, lineWidths[breakIndex], paint, moreChars);
                if (endPos < spanEnd) {
                    // preserve metrics for current span
                    fmTop = fm.top;
                    fmBottom = fm.bottom;
                    fmAscent = fm.ascent;
                    fmDescent = fm.descent;
                } else {
                    fmTop = fmBottom = fmAscent = fmDescent = 0;
                }
                here = endPos;
                breakIndex++;
                if (mLineCount >= mMaximumVisibleLineCount) {
                    return;
                }
            }
        }
        if (paraEnd == bufEnd)
            break;
    }
    if ((bufEnd == bufStart || source.charAt(bufEnd - 1) == CHAR_NEW_LINE) && mLineCount < mMaximumVisibleLineCount) {
        // Log.e("text", "output last " + bufEnd);
        measured.setPara(source, bufEnd, bufEnd, textDir, b);
        paint.getFontMetricsInt(fm);
        v = out(source, bufEnd, bufEnd, fm.ascent, fm.descent, fm.top, fm.bottom, v, spacingmult, spacingadd, null, null, fm, 0, needMultiply, measured.mLevels, measured.mDir, measured.mEasy, bufEnd, includepad, trackpad, null, null, bufStart, ellipsize, ellipsizedWidth, 0, paint, false);
    }
}

Example 10 with LeadingMarginSpan

use of android.text.style.LeadingMarginSpan in project android_frameworks_base by ResurrectionRemix.

the class Layout method drawText.

/**
     * @hide
     */
public void drawText(Canvas canvas, int firstLine, int lastLine) {
    int previousLineBottom = getLineTop(firstLine);
    int previousLineEnd = getLineStart(firstLine);
    ParagraphStyle[] spans = NO_PARA_SPANS;
    int spanEnd = 0;
    TextPaint paint = mPaint;
    CharSequence buf = mText;
    Alignment paraAlign = mAlignment;
    TabStops tabStops = null;
    boolean tabStopsIsInitialized = false;
    TextLine tl = TextLine.obtain();
    // The baseline is the top of the following line minus the current line's descent.
    for (int lineNum = firstLine; lineNum <= lastLine; lineNum++) {
        int start = previousLineEnd;
        previousLineEnd = getLineStart(lineNum + 1);
        int end = getLineVisibleEnd(lineNum, start, previousLineEnd);
        int ltop = previousLineBottom;
        int lbottom = getLineTop(lineNum + 1);
        previousLineBottom = lbottom;
        int lbaseline = lbottom - getLineDescent(lineNum);
        int dir = getParagraphDirection(lineNum);
        int left = 0;
        int right = mWidth;
        if (mSpannedText) {
            Spanned sp = (Spanned) buf;
            int textLength = buf.length();
            boolean isFirstParaLine = (start == 0 || buf.charAt(start - 1) == '\n');
            // our problem.
            if (start >= spanEnd && (lineNum == firstLine || isFirstParaLine)) {
                spanEnd = sp.nextSpanTransition(start, textLength, ParagraphStyle.class);
                spans = getParagraphSpans(sp, start, spanEnd, ParagraphStyle.class);
                paraAlign = mAlignment;
                for (int n = spans.length - 1; n >= 0; n--) {
                    if (spans[n] instanceof AlignmentSpan) {
                        paraAlign = ((AlignmentSpan) spans[n]).getAlignment();
                        break;
                    }
                }
                tabStopsIsInitialized = false;
            }
            // Draw all leading margin spans.  Adjust left or right according
            // to the paragraph direction of the line.
            final int length = spans.length;
            boolean useFirstLineMargin = isFirstParaLine;
            for (int n = 0; n < length; n++) {
                if (spans[n] instanceof LeadingMarginSpan2) {
                    int count = ((LeadingMarginSpan2) spans[n]).getLeadingMarginLineCount();
                    int startLine = getLineForOffset(sp.getSpanStart(spans[n]));
                    // the count that is greatest
                    if (lineNum < startLine + count) {
                        useFirstLineMargin = true;
                        break;
                    }
                }
            }
            for (int n = 0; n < length; n++) {
                if (spans[n] instanceof LeadingMarginSpan) {
                    LeadingMarginSpan margin = (LeadingMarginSpan) spans[n];
                    if (dir == DIR_RIGHT_TO_LEFT) {
                        margin.drawLeadingMargin(canvas, paint, right, dir, ltop, lbaseline, lbottom, buf, start, end, isFirstParaLine, this);
                        right -= margin.getLeadingMargin(useFirstLineMargin);
                    } else {
                        margin.drawLeadingMargin(canvas, paint, left, dir, ltop, lbaseline, lbottom, buf, start, end, isFirstParaLine, this);
                        left += margin.getLeadingMargin(useFirstLineMargin);
                    }
                }
            }
        }
        boolean hasTab = getLineContainsTab(lineNum);
        // Can't tell if we have tabs for sure, currently
        if (hasTab && !tabStopsIsInitialized) {
            if (tabStops == null) {
                tabStops = new TabStops(TAB_INCREMENT, spans);
            } else {
                tabStops.reset(TAB_INCREMENT, spans);
            }
            tabStopsIsInitialized = true;
        }
        // Determine whether the line aligns to normal, opposite, or center.
        Alignment align = paraAlign;
        if (align == Alignment.ALIGN_LEFT) {
            align = (dir == DIR_LEFT_TO_RIGHT) ? Alignment.ALIGN_NORMAL : Alignment.ALIGN_OPPOSITE;
        } else if (align == Alignment.ALIGN_RIGHT) {
            align = (dir == DIR_LEFT_TO_RIGHT) ? Alignment.ALIGN_OPPOSITE : Alignment.ALIGN_NORMAL;
        }
        int x;
        if (align == Alignment.ALIGN_NORMAL) {
            if (dir == DIR_LEFT_TO_RIGHT) {
                x = left + getIndentAdjust(lineNum, Alignment.ALIGN_LEFT);
            } else {
                x = right + getIndentAdjust(lineNum, Alignment.ALIGN_RIGHT);
            }
        } else {
            int max = (int) getLineExtent(lineNum, tabStops, false);
            if (align == Alignment.ALIGN_OPPOSITE) {
                if (dir == DIR_LEFT_TO_RIGHT) {
                    x = right - max + getIndentAdjust(lineNum, Alignment.ALIGN_RIGHT);
                } else {
                    x = left - max + getIndentAdjust(lineNum, Alignment.ALIGN_LEFT);
                }
            } else {
                // Alignment.ALIGN_CENTER
                max = max & ~1;
                x = ((right + left - max) >> 1) + getIndentAdjust(lineNum, Alignment.ALIGN_CENTER);
            }
        }
        paint.setHyphenEdit(getHyphen(lineNum));
        Directions directions = getLineDirections(lineNum);
        if (directions == DIRS_ALL_LEFT_TO_RIGHT && !mSpannedText && !hasTab) {
            // XXX: assumes there's nothing additional to be done
            canvas.drawText(buf, start, end, x, lbaseline, paint);
        } else {
            tl.set(paint, buf, start, end, dir, directions, hasTab, tabStops);
            tl.draw(canvas, x, ltop, lbaseline, lbottom);
        }
        paint.setHyphenEdit(0);
    }
    TextLine.recycle(tl);
}