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

Example 1 with TabStopSpan

use of android.text.style.TabStopSpan in project platform_frameworks_base by android.

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 2 with TabStopSpan

use of android.text.style.TabStopSpan in project platform_frameworks_base by android.

the class Layout method getLineExtent.

/**
     * Like {@link #getLineExtent(int,TabStops,boolean)} but determines the
     * tab stops instead of using the ones passed in.
     * @param line the index of the line
     * @param full whether to include trailing whitespace
     * @return the extent of the line
     */
private float getLineExtent(int line, boolean full) {
    int start = getLineStart(line);
    int end = full ? getLineEnd(line) : getLineVisibleEnd(line);
    boolean hasTabs = getLineContainsTab(line);
    TabStops tabStops = null;
    if (hasTabs && mText instanceof Spanned) {
        // Just checking this line should be good enough, tabs should be
        // consistent across all lines in a paragraph.
        TabStopSpan[] tabs = getParagraphSpans((Spanned) mText, start, end, TabStopSpan.class);
        if (tabs.length > 0) {
            // XXX should reuse
            tabStops = new TabStops(TAB_INCREMENT, tabs);
        }
    }
    Directions directions = getLineDirections(line);
    // Returned directions can actually be null
    if (directions == null) {
        return 0f;
    }
    int dir = getParagraphDirection(line);
    TextLine tl = TextLine.obtain();
    tl.set(mPaint, mText, start, end, dir, directions, hasTabs, tabStops);
    float width = tl.metrics(null);
    TextLine.recycle(tl);
    return width;
}

Example 3 with TabStopSpan

use of android.text.style.TabStopSpan in project platform_frameworks_base by android.

the class Layout method getHorizontal.

private float getHorizontal(int offset, boolean trailing, int line, boolean clamped) {
    int start = getLineStart(line);
    int end = getLineEnd(line);
    int dir = getParagraphDirection(line);
    boolean hasTab = getLineContainsTab(line);
    Directions directions = getLineDirections(line);
    TabStops tabStops = null;
    if (hasTab && mText instanceof Spanned) {
        // Just checking this line should be good enough, tabs should be
        // consistent across all lines in a paragraph.
        TabStopSpan[] tabs = getParagraphSpans((Spanned) mText, start, end, TabStopSpan.class);
        if (tabs.length > 0) {
            // XXX should reuse
            tabStops = new TabStops(TAB_INCREMENT, tabs);
        }
    }
    TextLine tl = TextLine.obtain();
    tl.set(mPaint, mText, start, end, dir, directions, hasTab, tabStops);
    float wid = tl.measure(offset - start, trailing, null);
    TextLine.recycle(tl);
    if (clamped && wid > mWidth) {
        wid = mWidth;
    }
    int left = getParagraphLeft(line);
    int right = getParagraphRight(line);
    return getLineStartPos(line, left, right) + wid;
}

Example 4 with TabStopSpan

use of android.text.style.TabStopSpan in project platform_frameworks_base by android.

the class Layout method nextTab.

/**
     * Returns the position of the next tab stop after h on the line.
     *
     * @param text the text
     * @param start start of the line
     * @param end limit of the line
     * @param h the current horizontal offset
     * @param tabs the tabs, can be null.  If it is null, any tabs in effect
     * on the line will be used.  If there are no tabs, a default offset
     * will be used to compute the tab stop.
     * @return the offset of the next tab stop.
     */
/* package */
static float nextTab(CharSequence text, int start, int end, float h, Object[] tabs) {
    float nh = Float.MAX_VALUE;
    boolean alltabs = false;
    if (text instanceof Spanned) {
        if (tabs == null) {
            tabs = getParagraphSpans((Spanned) text, start, end, TabStopSpan.class);
            alltabs = true;
        }
        for (int i = 0; i < tabs.length; i++) {
            if (!alltabs) {
                if (!(tabs[i] instanceof TabStopSpan))
                    continue;
            }
            int where = ((TabStopSpan) tabs[i]).getTabStop();
            if (where < nh && where > h)
                nh = where;
        }
        if (nh != Float.MAX_VALUE)
            return nh;
    }
    return ((int) ((h + TAB_INCREMENT) / TAB_INCREMENT)) * TAB_INCREMENT;
}

Example 5 with TabStopSpan

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

the class Layout method getLineExtent.

/**
     * Like {@link #getLineExtent(int,TabStops,boolean)} but determines the
     * tab stops instead of using the ones passed in.
     * @param line the index of the line
     * @param full whether to include trailing whitespace
     * @return the extent of the line
     */
private float getLineExtent(int line, boolean full) {
    int start = getLineStart(line);
    int end = full ? getLineEnd(line) : getLineVisibleEnd(line);
    boolean hasTabsOrEmoji = getLineContainsTab(line);
    TabStops tabStops = null;
    if (hasTabsOrEmoji && mText instanceof Spanned) {
        // Just checking this line should be good enough, tabs should be
        // consistent across all lines in a paragraph.
        TabStopSpan[] tabs = getParagraphSpans((Spanned) mText, start, end, TabStopSpan.class);
        if (tabs.length > 0) {
            // XXX should reuse
            tabStops = new TabStops(TAB_INCREMENT, tabs);
        }
    }
    Directions directions = getLineDirections(line);
    // Returned directions can actually be null
    if (directions == null) {
        return 0f;
    }
    int dir = getParagraphDirection(line);
    TextLine tl = TextLine.obtain();
    tl.set(mPaint, mText, start, end, dir, directions, hasTabsOrEmoji, tabStops);
    float width = tl.metrics(null);
    TextLine.recycle(tl);
    return width;
}