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

Example 21 with LeadingMarginSpan

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

the class Layout method getParagraphLeadingMargin.

/**
     * Returns the effective leading margin (unsigned) for this line,
     * taking into account LeadingMarginSpan and LeadingMarginSpan2.
     * @param line the line index
     * @return the leading margin of this line
     */
private int getParagraphLeadingMargin(int line) {
    if (!mSpannedText) {
        return 0;
    }
    Spanned spanned = (Spanned) mText;
    int lineStart = getLineStart(line);
    int lineEnd = getLineEnd(line);
    int spanEnd = spanned.nextSpanTransition(lineStart, lineEnd, LeadingMarginSpan.class);
    LeadingMarginSpan[] spans = getParagraphSpans(spanned, lineStart, spanEnd, LeadingMarginSpan.class);
    if (spans.length == 0) {
        // no leading margin span;
        return 0;
    }
    int margin = 0;
    boolean isFirstParaLine = lineStart == 0 || spanned.charAt(lineStart - 1) == '\n';
    boolean useFirstLineMargin = isFirstParaLine;
    for (int i = 0; i < spans.length; i++) {
        if (spans[i] instanceof LeadingMarginSpan2) {
            int spStart = spanned.getSpanStart(spans[i]);
            int spanLine = getLineForOffset(spStart);
            int count = ((LeadingMarginSpan2) spans[i]).getLeadingMarginLineCount();
            // if there is more than one LeadingMarginSpan2, use the count that is greatest
            useFirstLineMargin |= line < spanLine + count;
        }
    }
    for (int i = 0; i < spans.length; i++) {
        LeadingMarginSpan span = spans[i];
        margin += span.getLeadingMargin(useFirstLineMargin);
    }
    return margin;
}

Example 22 with LeadingMarginSpan

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

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 23 with LeadingMarginSpan

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

the class Layout method getParagraphLeadingMargin.

/**
     * Returns the effective leading margin (unsigned) for this line,
     * taking into account LeadingMarginSpan and LeadingMarginSpan2.
     * @param line the line index
     * @return the leading margin of this line
     */
private int getParagraphLeadingMargin(int line) {
    if (!mSpannedText) {
        return 0;
    }
    Spanned spanned = (Spanned) mText;
    int lineStart = getLineStart(line);
    int lineEnd = getLineEnd(line);
    int spanEnd = spanned.nextSpanTransition(lineStart, lineEnd, LeadingMarginSpan.class);
    LeadingMarginSpan[] spans = getParagraphSpans(spanned, lineStart, spanEnd, LeadingMarginSpan.class);
    if (spans.length == 0) {
        // no leading margin span;
        return 0;
    }
    int margin = 0;
    boolean isFirstParaLine = lineStart == 0 || spanned.charAt(lineStart - 1) == '\n';
    boolean useFirstLineMargin = isFirstParaLine;
    for (int i = 0; i < spans.length; i++) {
        if (spans[i] instanceof LeadingMarginSpan2) {
            int spStart = spanned.getSpanStart(spans[i]);
            int spanLine = getLineForOffset(spStart);
            int count = ((LeadingMarginSpan2) spans[i]).getLeadingMarginLineCount();
            // if there is more than one LeadingMarginSpan2, use the count that is greatest
            useFirstLineMargin |= line < spanLine + count;
        }
    }
    for (int i = 0; i < spans.length; i++) {
        LeadingMarginSpan span = spans[i];
        margin += span.getLeadingMargin(useFirstLineMargin);
    }
    return margin;
}

Example 24 with LeadingMarginSpan

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

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 25 with LeadingMarginSpan

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

the class Layout method getParagraphLeadingMargin.

/**
     * Returns the effective leading margin (unsigned) for this line,
     * taking into account LeadingMarginSpan and LeadingMarginSpan2.
     * @param line the line index
     * @return the leading margin of this line
     */
private int getParagraphLeadingMargin(int line) {
    if (!mSpannedText) {
        return 0;
    }
    Spanned spanned = (Spanned) mText;
    int lineStart = getLineStart(line);
    int lineEnd = getLineEnd(line);
    int spanEnd = spanned.nextSpanTransition(lineStart, lineEnd, LeadingMarginSpan.class);
    LeadingMarginSpan[] spans = getParagraphSpans(spanned, lineStart, spanEnd, LeadingMarginSpan.class);
    if (spans.length == 0) {
        // no leading margin span;
        return 0;
    }
    int margin = 0;
    boolean isFirstParaLine = lineStart == 0 || spanned.charAt(lineStart - 1) == '\n';
    boolean useFirstLineMargin = isFirstParaLine;
    for (int i = 0; i < spans.length; i++) {
        if (spans[i] instanceof LeadingMarginSpan2) {
            int spStart = spanned.getSpanStart(spans[i]);
            int spanLine = getLineForOffset(spStart);
            int count = ((LeadingMarginSpan2) spans[i]).getLeadingMarginLineCount();
            // if there is more than one LeadingMarginSpan2, use the count that is greatest
            useFirstLineMargin |= line < spanLine + count;
        }
    }
    for (int i = 0; i < spans.length; i++) {
        LeadingMarginSpan span = spans[i];
        margin += span.getLeadingMargin(useFirstLineMargin);
    }
    return margin;
}