| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.text; |
| |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| import android.graphics.Path; |
| import com.android.internal.util.ArrayUtils; |
| import android.util.Config; |
| |
| import junit.framework.Assert; |
| import android.text.style.*; |
| import android.text.method.TextKeyListener; |
| import android.view.KeyEvent; |
| |
| /** |
| * A base class that manages text layout in visual elements on |
| * the screen. |
| * <p>For text that will be edited, use a {@link DynamicLayout}, |
| * which will be updated as the text changes. |
| * For text that will not change, use a {@link StaticLayout}. |
| */ |
| public abstract class Layout { |
| /** |
| * Return how wide a layout would be necessary to display the |
| * specified text with one line per paragraph. |
| */ |
| public static float getDesiredWidth(CharSequence source, |
| TextPaint paint) { |
| return getDesiredWidth(source, 0, source.length(), paint); |
| } |
| |
| /** |
| * Return how wide a layout would be necessary to display the |
| * specified text slice with one line per paragraph. |
| */ |
| public static float getDesiredWidth(CharSequence source, |
| int start, int end, |
| TextPaint paint) { |
| float need = 0; |
| TextPaint workPaint = new TextPaint(); |
| |
| int next; |
| for (int i = start; i <= end; i = next) { |
| next = TextUtils.indexOf(source, '\n', i, end); |
| |
| if (next < 0) |
| next = end; |
| |
| float w = measureText(paint, workPaint, |
| source, i, next, null, true, null); |
| |
| if (w > need) |
| need = w; |
| |
| next++; |
| } |
| |
| return need; |
| } |
| |
| /** |
| * Subclasses of Layout use this constructor to set the display text, |
| * width, and other standard properties. |
| */ |
| protected Layout(CharSequence text, TextPaint paint, |
| int width, Alignment align, |
| float spacingmult, float spacingadd) { |
| if (width < 0) |
| throw new IllegalArgumentException("Layout: " + width + " < 0"); |
| |
| mText = text; |
| mPaint = paint; |
| mWorkPaint = new TextPaint(); |
| mWidth = width; |
| mAlignment = align; |
| mSpacingMult = spacingmult; |
| mSpacingAdd = spacingadd; |
| mSpannedText = text instanceof Spanned; |
| } |
| |
| /** |
| * Replace constructor properties of this Layout with new ones. Be careful. |
| */ |
| /* package */ void replaceWith(CharSequence text, TextPaint paint, |
| int width, Alignment align, |
| float spacingmult, float spacingadd) { |
| if (width < 0) { |
| throw new IllegalArgumentException("Layout: " + width + " < 0"); |
| } |
| |
| mText = text; |
| mPaint = paint; |
| mWidth = width; |
| mAlignment = align; |
| mSpacingMult = spacingmult; |
| mSpacingAdd = spacingadd; |
| mSpannedText = text instanceof Spanned; |
| } |
| |
| /** |
| * Draw this Layout on the specified Canvas. |
| */ |
| public void draw(Canvas c) { |
| draw(c, null, null, 0); |
| } |
| |
| /** |
| * Draw the specified rectangle from this Layout on the specified Canvas, |
| * with the specified path drawn between the background and the text. |
| */ |
| public void draw(Canvas c, Path highlight, Paint highlightpaint, |
| int cursorOffsetVertical) { |
| int dtop, dbottom; |
| |
| synchronized (sTempRect) { |
| if (!c.getClipBounds(sTempRect)) { |
| return; |
| } |
| |
| dtop = sTempRect.top; |
| dbottom = sTempRect.bottom; |
| } |
| |
| TextPaint paint = mPaint; |
| |
| int top = 0; |
| // getLineBottom(getLineCount() -1) just calls getLineTop(getLineCount) |
| int bottom = getLineTop(getLineCount()); |
| |
| |
| if (dtop > top) { |
| top = dtop; |
| } |
| if (dbottom < bottom) { |
| bottom = dbottom; |
| } |
| |
| int first = getLineForVertical(top); |
| int last = getLineForVertical(bottom); |
| |
| int previousLineBottom = getLineTop(first); |
| int previousLineEnd = getLineStart(first); |
| |
| CharSequence buf = mText; |
| |
| ParagraphStyle[] nospans = ArrayUtils.emptyArray(ParagraphStyle.class); |
| ParagraphStyle[] spans = nospans; |
| int spanend = 0; |
| int textLength = 0; |
| boolean spannedText = mSpannedText; |
| |
| if (spannedText) { |
| spanend = 0; |
| textLength = buf.length(); |
| for (int i = first; i <= last; i++) { |
| int start = previousLineEnd; |
| int end = getLineStart(i+1); |
| previousLineEnd = end; |
| |
| int ltop = previousLineBottom; |
| int lbottom = getLineTop(i+1); |
| previousLineBottom = lbottom; |
| int lbaseline = lbottom - getLineDescent(i); |
| |
| if (start >= spanend) { |
| Spanned sp = (Spanned) buf; |
| spanend = sp.nextSpanTransition(start, textLength, |
| LineBackgroundSpan.class); |
| spans = sp.getSpans(start, spanend, |
| LineBackgroundSpan.class); |
| } |
| |
| for (int n = 0; n < spans.length; n++) { |
| LineBackgroundSpan back = (LineBackgroundSpan) spans[n]; |
| |
| back.drawBackground(c, paint, 0, mWidth, |
| ltop, lbaseline, lbottom, |
| buf, start, end, |
| i); |
| } |
| } |
| // reset to their original values |
| spanend = 0; |
| previousLineBottom = getLineTop(first); |
| previousLineEnd = getLineStart(first); |
| spans = nospans; |
| } |
| |
| // There can be a highlight even without spans if we are drawing |
| // a non-spanned transformation of a spanned editing buffer. |
| if (highlight != null) { |
| if (cursorOffsetVertical != 0) { |
| c.translate(0, cursorOffsetVertical); |
| } |
| |
| c.drawPath(highlight, highlightpaint); |
| |
| if (cursorOffsetVertical != 0) { |
| c.translate(0, -cursorOffsetVertical); |
| } |
| } |
| |
| Alignment align = mAlignment; |
| |
| for (int i = first; i <= last; i++) { |
| int start = previousLineEnd; |
| |
| previousLineEnd = getLineStart(i+1); |
| int end = getLineVisibleEnd(i, start, previousLineEnd); |
| |
| int ltop = previousLineBottom; |
| int lbottom = getLineTop(i+1); |
| previousLineBottom = lbottom; |
| int lbaseline = lbottom - getLineDescent(i); |
| |
| boolean par = false; |
| if (spannedText) { |
| if (start == 0 || buf.charAt(start - 1) == '\n') { |
| par = true; |
| } |
| if (start >= spanend) { |
| |
| Spanned sp = (Spanned) buf; |
| |
| spanend = sp.nextSpanTransition(start, textLength, |
| ParagraphStyle.class); |
| spans = sp.getSpans(start, spanend, ParagraphStyle.class); |
| |
| align = mAlignment; |
| |
| for (int n = spans.length-1; n >= 0; n--) { |
| if (spans[n] instanceof AlignmentSpan) { |
| align = ((AlignmentSpan) spans[n]).getAlignment(); |
| break; |
| } |
| } |
| } |
| } |
| |
| int dir = getParagraphDirection(i); |
| int left = 0; |
| int right = mWidth; |
| |
| if (spannedText) { |
| final int length = spans.length; |
| 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(c, paint, right, dir, ltop, |
| lbaseline, lbottom, buf, |
| start, end, par, this); |
| |
| right -= margin.getLeadingMargin(par); |
| } else { |
| margin.drawLeadingMargin(c, paint, left, dir, ltop, |
| lbaseline, lbottom, buf, |
| start, end, par, this); |
| |
| left += margin.getLeadingMargin(par); |
| } |
| } |
| } |
| } |
| |
| int x; |
| if (align == Alignment.ALIGN_NORMAL) { |
| if (dir == DIR_LEFT_TO_RIGHT) { |
| x = left; |
| } else { |
| x = right; |
| } |
| } else { |
| int max = (int)getLineMax(i, spans, false); |
| if (align == Alignment.ALIGN_OPPOSITE) { |
| if (dir == DIR_RIGHT_TO_LEFT) { |
| x = left + max; |
| } else { |
| x = right - max; |
| } |
| } else { |
| // Alignment.ALIGN_CENTER |
| max = max & ~1; |
| int half = (right - left - max) >> 1; |
| if (dir == DIR_RIGHT_TO_LEFT) { |
| x = right - half; |
| } else { |
| x = left + half; |
| } |
| } |
| } |
| |
| Directions directions = getLineDirections(i); |
| boolean hasTab = getLineContainsTab(i); |
| if (directions == DIRS_ALL_LEFT_TO_RIGHT && |
| !spannedText && !hasTab) { |
| if (Config.DEBUG) { |
| Assert.assertTrue(dir == DIR_LEFT_TO_RIGHT); |
| Assert.assertNotNull(c); |
| } |
| c.drawText(buf, start, end, x, lbaseline, paint); |
| } else { |
| drawText(c, buf, start, end, dir, directions, |
| x, ltop, lbaseline, lbottom, paint, mWorkPaint, |
| hasTab, spans); |
| } |
| } |
| } |
| |
| /** |
| * Return the text that is displayed by this Layout. |
| */ |
| public final CharSequence getText() { |
| return mText; |
| } |
| |
| /** |
| * Return the base Paint properties for this layout. |
| * Do NOT change the paint, which may result in funny |
| * drawing for this layout. |
| */ |
| public final TextPaint getPaint() { |
| return mPaint; |
| } |
| |
| /** |
| * Return the width of this layout. |
| */ |
| public final int getWidth() { |
| return mWidth; |
| } |
| |
| /** |
| * Return the width to which this Layout is ellipsizing, or |
| * {@link #getWidth} if it is not doing anything special. |
| */ |
| public int getEllipsizedWidth() { |
| return mWidth; |
| } |
| |
| /** |
| * Increase the width of this layout to the specified width. |
| * Be careful to use this only when you know it is appropriate -- |
| * it does not cause the text to reflow to use the full new width. |
| */ |
| public final void increaseWidthTo(int wid) { |
| if (wid < mWidth) { |
| throw new RuntimeException("attempted to reduce Layout width"); |
| } |
| |
| mWidth = wid; |
| } |
| |
| /** |
| * Return the total height of this layout. |
| */ |
| public int getHeight() { |
| return getLineTop(getLineCount()); // same as getLineBottom(getLineCount() - 1); |
| } |
| |
| /** |
| * Return the base alignment of this layout. |
| */ |
| public final Alignment getAlignment() { |
| return mAlignment; |
| } |
| |
| /** |
| * Return what the text height is multiplied by to get the line height. |
| */ |
| public final float getSpacingMultiplier() { |
| return mSpacingMult; |
| } |
| |
| /** |
| * Return the number of units of leading that are added to each line. |
| */ |
| public final float getSpacingAdd() { |
| return mSpacingAdd; |
| } |
| |
| /** |
| * Return the number of lines of text in this layout. |
| */ |
| public abstract int getLineCount(); |
| |
| /** |
| * Return the baseline for the specified line (0…getLineCount() - 1) |
| * If bounds is not null, return the top, left, right, bottom extents |
| * of the specified line in it. |
| * @param line which line to examine (0..getLineCount() - 1) |
| * @param bounds Optional. If not null, it returns the extent of the line |
| * @return the Y-coordinate of the baseline |
| */ |
| public int getLineBounds(int line, Rect bounds) { |
| if (bounds != null) { |
| bounds.left = 0; // ??? |
| bounds.top = getLineTop(line); |
| bounds.right = mWidth; // ??? |
| bounds.bottom = getLineBottom(line); |
| } |
| return getLineBaseline(line); |
| } |
| |
| /** |
| * Return the vertical position of the top of the specified line. |
| * If the specified line is one beyond the last line, returns the |
| * bottom of the last line. |
| */ |
| public abstract int getLineTop(int line); |
| |
| /** |
| * Return the descent of the specified line. |
| */ |
| public abstract int getLineDescent(int line); |
| |
| /** |
| * Return the text offset of the beginning of the specified line. |
| * If the specified line is one beyond the last line, returns the |
| * end of the last line. |
| */ |
| public abstract int getLineStart(int line); |
| |
| /** |
| * Returns the primary directionality of the paragraph containing |
| * the specified line. |
| */ |
| public abstract int getParagraphDirection(int line); |
| |
| /** |
| * Returns whether the specified line contains one or more tabs. |
| */ |
| public abstract boolean getLineContainsTab(int line); |
| |
| /** |
| * Returns an array of directionalities for the specified line. |
| * The array alternates counts of characters in left-to-right |
| * and right-to-left segments of the line. |
| */ |
| public abstract Directions getLineDirections(int line); |
| |
| /** |
| * Returns the (negative) number of extra pixels of ascent padding in the |
| * top line of the Layout. |
| */ |
| public abstract int getTopPadding(); |
| |
| /** |
| * Returns the number of extra pixels of descent padding in the |
| * bottom line of the Layout. |
| */ |
| public abstract int getBottomPadding(); |
| |
| /** |
| * Get the primary horizontal position for the specified text offset. |
| * This is the location where a new character would be inserted in |
| * the paragraph's primary direction. |
| */ |
| public float getPrimaryHorizontal(int offset) { |
| return getHorizontal(offset, false, true); |
| } |
| |
| /** |
| * Get the secondary horizontal position for the specified text offset. |
| * This is the location where a new character would be inserted in |
| * the direction other than the paragraph's primary direction. |
| */ |
| public float getSecondaryHorizontal(int offset) { |
| return getHorizontal(offset, true, true); |
| } |
| |
| private float getHorizontal(int offset, boolean trailing, boolean alt) { |
| int line = getLineForOffset(offset); |
| |
| return getHorizontal(offset, trailing, alt, line); |
| } |
| |
| private float getHorizontal(int offset, boolean trailing, boolean alt, |
| int line) { |
| int start = getLineStart(line); |
| int end = getLineVisibleEnd(line); |
| int dir = getParagraphDirection(line); |
| boolean tab = getLineContainsTab(line); |
| Directions directions = getLineDirections(line); |
| |
| TabStopSpan[] tabs = null; |
| if (tab && mText instanceof Spanned) { |
| tabs = ((Spanned) mText).getSpans(start, end, TabStopSpan.class); |
| } |
| |
| float wid = measureText(mPaint, mWorkPaint, mText, start, offset, end, |
| dir, directions, trailing, alt, tab, tabs); |
| |
| if (offset > end) { |
| if (dir == DIR_RIGHT_TO_LEFT) |
| wid -= measureText(mPaint, mWorkPaint, |
| mText, end, offset, null, tab, tabs); |
| else |
| wid += measureText(mPaint, mWorkPaint, |
| mText, end, offset, null, tab, tabs); |
| } |
| |
| Alignment align = getParagraphAlignment(line); |
| int left = getParagraphLeft(line); |
| int right = getParagraphRight(line); |
| |
| if (align == Alignment.ALIGN_NORMAL) { |
| if (dir == DIR_RIGHT_TO_LEFT) |
| return right + wid; |
| else |
| return left + wid; |
| } |
| |
| float max = getLineMax(line); |
| |
| if (align == Alignment.ALIGN_OPPOSITE) { |
| if (dir == DIR_RIGHT_TO_LEFT) |
| return left + max + wid; |
| else |
| return right - max + wid; |
| } else { /* align == Alignment.ALIGN_CENTER */ |
| int imax = ((int) max) & ~1; |
| |
| if (dir == DIR_RIGHT_TO_LEFT) |
| return right - (((right - left) - imax) / 2) + wid; |
| else |
| return left + ((right - left) - imax) / 2 + wid; |
| } |
| } |
| |
| /** |
| * Get the leftmost position that should be exposed for horizontal |
| * scrolling on the specified line. |
| */ |
| public float getLineLeft(int line) { |
| int dir = getParagraphDirection(line); |
| Alignment align = getParagraphAlignment(line); |
| |
| if (align == Alignment.ALIGN_NORMAL) { |
| if (dir == DIR_RIGHT_TO_LEFT) |
| return getParagraphRight(line) - getLineMax(line); |
| else |
| return 0; |
| } else if (align == Alignment.ALIGN_OPPOSITE) { |
| if (dir == DIR_RIGHT_TO_LEFT) |
| return 0; |
| else |
| return mWidth - getLineMax(line); |
| } else { /* align == Alignment.ALIGN_CENTER */ |
| int left = getParagraphLeft(line); |
| int right = getParagraphRight(line); |
| int max = ((int) getLineMax(line)) & ~1; |
| |
| return left + ((right - left) - max) / 2; |
| } |
| } |
| |
| /** |
| * Get the rightmost position that should be exposed for horizontal |
| * scrolling on the specified line. |
| */ |
| public float getLineRight(int line) { |
| int dir = getParagraphDirection(line); |
| Alignment align = getParagraphAlignment(line); |
| |
| if (align == Alignment.ALIGN_NORMAL) { |
| if (dir == DIR_RIGHT_TO_LEFT) |
| return mWidth; |
| else |
| return getParagraphLeft(line) + getLineMax(line); |
| } else if (align == Alignment.ALIGN_OPPOSITE) { |
| if (dir == DIR_RIGHT_TO_LEFT) |
| return getLineMax(line); |
| else |
| return mWidth; |
| } else { /* align == Alignment.ALIGN_CENTER */ |
| int left = getParagraphLeft(line); |
| int right = getParagraphRight(line); |
| int max = ((int) getLineMax(line)) & ~1; |
| |
| return right - ((right - left) - max) / 2; |
| } |
| } |
| |
| /** |
| * Gets the horizontal extent of the specified line, excluding |
| * trailing whitespace. |
| */ |
| public float getLineMax(int line) { |
| return getLineMax(line, null, false); |
| } |
| |
| /** |
| * Gets the horizontal extent of the specified line, including |
| * trailing whitespace. |
| */ |
| public float getLineWidth(int line) { |
| return getLineMax(line, null, true); |
| } |
| |
| private float getLineMax(int line, Object[] tabs, boolean full) { |
| int start = getLineStart(line); |
| int end; |
| |
| if (full) { |
| end = getLineEnd(line); |
| } else { |
| end = getLineVisibleEnd(line); |
| } |
| boolean tab = getLineContainsTab(line); |
| |
| if (tabs == null && tab && mText instanceof Spanned) { |
| tabs = ((Spanned) mText).getSpans(start, end, TabStopSpan.class); |
| } |
| |
| return measureText(mPaint, mWorkPaint, |
| mText, start, end, null, tab, tabs); |
| } |
| |
| /** |
| * Get the line number corresponding to the specified vertical position. |
| * If you ask for a position above 0, you get 0; if you ask for a position |
| * below the bottom of the text, you get the last line. |
| */ |
| // FIXME: It may be faster to do a linear search for layouts without many lines. |
| public int getLineForVertical(int vertical) { |
| int high = getLineCount(), low = -1, guess; |
| |
| while (high - low > 1) { |
| guess = (high + low) / 2; |
| |
| if (getLineTop(guess) > vertical) |
| high = guess; |
| else |
| low = guess; |
| } |
| |
| if (low < 0) |
| return 0; |
| else |
| return low; |
| } |
| |
| /** |
| * Get the line number on which the specified text offset appears. |
| * If you ask for a position before 0, you get 0; if you ask for a position |
| * beyond the end of the text, you get the last line. |
| */ |
| public int getLineForOffset(int offset) { |
| int high = getLineCount(), low = -1, guess; |
| |
| while (high - low > 1) { |
| guess = (high + low) / 2; |
| |
| if (getLineStart(guess) > offset) |
| high = guess; |
| else |
| low = guess; |
| } |
| |
| if (low < 0) |
| return 0; |
| else |
| return low; |
| } |
| |
| /** |
| * Get the character offset on the specfied line whose position is |
| * closest to the specified horizontal position. |
| */ |
| public int getOffsetForHorizontal(int line, float horiz) { |
| int max = getLineEnd(line) - 1; |
| int min = getLineStart(line); |
| Directions dirs = getLineDirections(line); |
| |
| if (line == getLineCount() - 1) |
| max++; |
| |
| int best = min; |
| float bestdist = Math.abs(getPrimaryHorizontal(best) - horiz); |
| |
| int here = min; |
| for (int i = 0; i < dirs.mDirections.length; i++) { |
| int there = here + dirs.mDirections[i]; |
| int swap = ((i & 1) == 0) ? 1 : -1; |
| |
| if (there > max) |
| there = max; |
| |
| int high = there - 1 + 1, low = here + 1 - 1, guess; |
| |
| while (high - low > 1) { |
| guess = (high + low) / 2; |
| int adguess = getOffsetAtStartOf(guess); |
| |
| if (getPrimaryHorizontal(adguess) * swap >= horiz * swap) |
| high = guess; |
| else |
| low = guess; |
| } |
| |
| if (low < here + 1) |
| low = here + 1; |
| |
| if (low < there) { |
| low = getOffsetAtStartOf(low); |
| |
| float dist = Math.abs(getPrimaryHorizontal(low) - horiz); |
| |
| int aft = TextUtils.getOffsetAfter(mText, low); |
| if (aft < there) { |
| float other = Math.abs(getPrimaryHorizontal(aft) - horiz); |
| |
| if (other < dist) { |
| dist = other; |
| low = aft; |
| } |
| } |
| |
| if (dist < bestdist) { |
| bestdist = dist; |
| best = low; |
| } |
| } |
| |
| float dist = Math.abs(getPrimaryHorizontal(here) - horiz); |
| |
| if (dist < bestdist) { |
| bestdist = dist; |
| best = here; |
| } |
| |
| here = there; |
| } |
| |
| float dist = Math.abs(getPrimaryHorizontal(max) - horiz); |
| |
| if (dist < bestdist) { |
| bestdist = dist; |
| best = max; |
| } |
| |
| return best; |
| } |
| |
| /** |
| * Return the text offset after the last character on the specified line. |
| */ |
| public final int getLineEnd(int line) { |
| return getLineStart(line + 1); |
| } |
| |
| /** |
| * Return the text offset after the last visible character (so whitespace |
| * is not counted) on the specified line. |
| */ |
| public int getLineVisibleEnd(int line) { |
| return getLineVisibleEnd(line, getLineStart(line), getLineStart(line+1)); |
| } |
| |
| private int getLineVisibleEnd(int line, int start, int end) { |
| if (Config.DEBUG) { |
| Assert.assertTrue(getLineStart(line) == start && getLineStart(line+1) == end); |
| } |
| |
| CharSequence text = mText; |
| char ch; |
| if (line == getLineCount() - 1) { |
| return end; |
| } |
| |
| for (; end > start; end--) { |
| ch = text.charAt(end - 1); |
| |
| if (ch == '\n') { |
| return end - 1; |
| } |
| |
| if (ch != ' ' && ch != '\t') { |
| break; |
| } |
| |
| } |
| |
| return end; |
| } |
| |
| /** |
| * Return the vertical position of the bottom of the specified line. |
| */ |
| public final int getLineBottom(int line) { |
| return getLineTop(line + 1); |
| } |
| |
| /** |
| * Return the vertical position of the baseline of the specified line. |
| */ |
| public final int getLineBaseline(int line) { |
| // getLineTop(line+1) == getLineTop(line) |
| return getLineTop(line+1) - getLineDescent(line); |
| } |
| |
| /** |
| * Get the ascent of the text on the specified line. |
| * The return value is negative to match the Paint.ascent() convention. |
| */ |
| public final int getLineAscent(int line) { |
| // getLineTop(line+1) - getLineDescent(line) == getLineBaseLine(line) |
| return getLineTop(line) - (getLineTop(line+1) - getLineDescent(line)); |
| } |
| |
| /** |
| * Return the text offset that would be reached by moving left |
| * (possibly onto another line) from the specified offset. |
| */ |
| public int getOffsetToLeftOf(int offset) { |
| int line = getLineForOffset(offset); |
| int start = getLineStart(line); |
| int end = getLineEnd(line); |
| Directions dirs = getLineDirections(line); |
| |
| if (line != getLineCount() - 1) |
| end--; |
| |
| float horiz = getPrimaryHorizontal(offset); |
| |
| int best = offset; |
| float besth = Integer.MIN_VALUE; |
| int candidate; |
| |
| candidate = TextUtils.getOffsetBefore(mText, offset); |
| if (candidate >= start && candidate <= end) { |
| float h = getPrimaryHorizontal(candidate); |
| |
| if (h < horiz && h > besth) { |
| best = candidate; |
| besth = h; |
| } |
| } |
| |
| candidate = TextUtils.getOffsetAfter(mText, offset); |
| if (candidate >= start && candidate <= end) { |
| float h = getPrimaryHorizontal(candidate); |
| |
| if (h < horiz && h > besth) { |
| best = candidate; |
| besth = h; |
| } |
| } |
| |
| int here = start; |
| for (int i = 0; i < dirs.mDirections.length; i++) { |
| int there = here + dirs.mDirections[i]; |
| if (there > end) |
| there = end; |
| |
| float h = getPrimaryHorizontal(here); |
| |
| if (h < horiz && h > besth) { |
| best = here; |
| besth = h; |
| } |
| |
| candidate = TextUtils.getOffsetAfter(mText, here); |
| if (candidate >= start && candidate <= end) { |
| h = getPrimaryHorizontal(candidate); |
| |
| if (h < horiz && h > besth) { |
| best = candidate; |
| besth = h; |
| } |
| } |
| |
| candidate = TextUtils.getOffsetBefore(mText, there); |
| if (candidate >= start && candidate <= end) { |
| h = getPrimaryHorizontal(candidate); |
| |
| if (h < horiz && h > besth) { |
| best = candidate; |
| besth = h; |
| } |
| } |
| |
| here = there; |
| } |
| |
| float h = getPrimaryHorizontal(end); |
| |
| if (h < horiz && h > besth) { |
| best = end; |
| besth = h; |
| } |
| |
| if (best != offset) |
| return best; |
| |
| int dir = getParagraphDirection(line); |
| |
| if (dir > 0) { |
| if (line == 0) |
| return best; |
| else |
| return getOffsetForHorizontal(line - 1, 10000); |
| } else { |
| if (line == getLineCount() - 1) |
| return best; |
| else |
| return getOffsetForHorizontal(line + 1, 10000); |
| } |
| } |
| |
| /** |
| * Return the text offset that would be reached by moving right |
| * (possibly onto another line) from the specified offset. |
| */ |
| public int getOffsetToRightOf(int offset) { |
| int line = getLineForOffset(offset); |
| int start = getLineStart(line); |
| int end = getLineEnd(line); |
| Directions dirs = getLineDirections(line); |
| |
| if (line != getLineCount() - 1) |
| end--; |
| |
| float horiz = getPrimaryHorizontal(offset); |
| |
| int best = offset; |
| float besth = Integer.MAX_VALUE; |
| int candidate; |
| |
| candidate = TextUtils.getOffsetBefore(mText, offset); |
| if (candidate >= start && candidate <= end) { |
| float h = getPrimaryHorizontal(candidate); |
| |
| if (h > horiz && h < besth) { |
| best = candidate; |
| besth = h; |
| } |
| } |
| |
| candidate = TextUtils.getOffsetAfter(mText, offset); |
| if (candidate >= start && candidate <= end) { |
| float h = getPrimaryHorizontal(candidate); |
| |
| if (h > horiz && h < besth) { |
| best = candidate; |
| besth = h; |
| } |
| } |
| |
| int here = start; |
| for (int i = 0; i < dirs.mDirections.length; i++) { |
| int there = here + dirs.mDirections[i]; |
| if (there > end) |
| there = end; |
| |
| float h = getPrimaryHorizontal(here); |
| |
| if (h > horiz && h < besth) { |
| best = here; |
| besth = h; |
| } |
| |
| candidate = TextUtils.getOffsetAfter(mText, here); |
| if (candidate >= start && candidate <= end) { |
| h = getPrimaryHorizontal(candidate); |
| |
| if (h > horiz && h < besth) { |
| best = candidate; |
| besth = h; |
| } |
| } |
| |
| candidate = TextUtils.getOffsetBefore(mText, there); |
| if (candidate >= start && candidate <= end) { |
| h = getPrimaryHorizontal(candidate); |
| |
| if (h > horiz && h < besth) { |
| best = candidate; |
| besth = h; |
| } |
| } |
| |
| here = there; |
| } |
| |
| float h = getPrimaryHorizontal(end); |
| |
| if (h > horiz && h < besth) { |
| best = end; |
| besth = h; |
| } |
| |
| if (best != offset) |
| return best; |
| |
| int dir = getParagraphDirection(line); |
| |
| if (dir > 0) { |
| if (line == getLineCount() - 1) |
| return best; |
| else |
| return getOffsetForHorizontal(line + 1, -10000); |
| } else { |
| if (line == 0) |
| return best; |
| else |
| return getOffsetForHorizontal(line - 1, -10000); |
| } |
| } |
| |
| private int getOffsetAtStartOf(int offset) { |
| if (offset == 0) |
| return 0; |
| |
| CharSequence text = mText; |
| char c = text.charAt(offset); |
| |
| if (c >= '\uDC00' && c <= '\uDFFF') { |
| char c1 = text.charAt(offset - 1); |
| |
| if (c1 >= '\uD800' && c1 <= '\uDBFF') |
| offset -= 1; |
| } |
| |
| if (mSpannedText) { |
| ReplacementSpan[] spans = ((Spanned) text).getSpans(offset, offset, |
| ReplacementSpan.class); |
| |
| for (int i = 0; i < spans.length; i++) { |
| int start = ((Spanned) text).getSpanStart(spans[i]); |
| int end = ((Spanned) text).getSpanEnd(spans[i]); |
| |
| if (start < offset && end > offset) |
| offset = start; |
| } |
| } |
| |
| return offset; |
| } |
| |
| /** |
| * Fills in the specified Path with a representation of a cursor |
| * at the specified offset. This will often be a vertical line |
| * but can be multiple discontinous lines in text with multiple |
| * directionalities. |
| */ |
| public void getCursorPath(int point, Path dest, |
| CharSequence editingBuffer) { |
| dest.reset(); |
| |
| int line = getLineForOffset(point); |
| int top = getLineTop(line); |
| int bottom = getLineTop(line+1); |
| |
| float h1 = getPrimaryHorizontal(point) - 0.5f; |
| float h2 = getSecondaryHorizontal(point) - 0.5f; |
| |
| int caps = TextKeyListener.getMetaState(editingBuffer, |
| KeyEvent.META_SHIFT_ON) | |
| TextKeyListener.getMetaState(editingBuffer, |
| TextKeyListener.META_SELECTING); |
| int fn = TextKeyListener.getMetaState(editingBuffer, |
| KeyEvent.META_ALT_ON); |
| int dist = 0; |
| |
| if (caps != 0 || fn != 0) { |
| dist = (bottom - top) >> 2; |
| |
| if (fn != 0) |
| top += dist; |
| if (caps != 0) |
| bottom -= dist; |
| } |
| |
| if (h1 < 0.5f) |
| h1 = 0.5f; |
| if (h2 < 0.5f) |
| h2 = 0.5f; |
| |
| if (h1 == h2) { |
| dest.moveTo(h1, top); |
| dest.lineTo(h1, bottom); |
| } else { |
| dest.moveTo(h1, top); |
| dest.lineTo(h1, (top + bottom) >> 1); |
| |
| dest.moveTo(h2, (top + bottom) >> 1); |
| dest.lineTo(h2, bottom); |
| } |
| |
| if (caps == 2) { |
| dest.moveTo(h2, bottom); |
| dest.lineTo(h2 - dist, bottom + dist); |
| dest.lineTo(h2, bottom); |
| dest.lineTo(h2 + dist, bottom + dist); |
| } else if (caps == 1) { |
| dest.moveTo(h2, bottom); |
| dest.lineTo(h2 - dist, bottom + dist); |
| |
| dest.moveTo(h2 - dist, bottom + dist - 0.5f); |
| dest.lineTo(h2 + dist, bottom + dist - 0.5f); |
| |
| dest.moveTo(h2 + dist, bottom + dist); |
| dest.lineTo(h2, bottom); |
| } |
| |
| if (fn == 2) { |
| dest.moveTo(h1, top); |
| dest.lineTo(h1 - dist, top - dist); |
| dest.lineTo(h1, top); |
| dest.lineTo(h1 + dist, top - dist); |
| } else if (fn == 1) { |
| dest.moveTo(h1, top); |
| dest.lineTo(h1 - dist, top - dist); |
| |
| dest.moveTo(h1 - dist, top - dist + 0.5f); |
| dest.lineTo(h1 + dist, top - dist + 0.5f); |
| |
| dest.moveTo(h1 + dist, top - dist); |
| dest.lineTo(h1, top); |
| } |
| } |
| |
| private void addSelection(int line, int start, int end, |
| int top, int bottom, Path dest) { |
| int linestart = getLineStart(line); |
| int lineend = getLineEnd(line); |
| Directions dirs = getLineDirections(line); |
| |
| if (lineend > linestart && mText.charAt(lineend - 1) == '\n') |
| lineend--; |
| |
| int here = linestart; |
| for (int i = 0; i < dirs.mDirections.length; i++) { |
| int there = here + dirs.mDirections[i]; |
| if (there > lineend) |
| there = lineend; |
| |
| if (start <= there && end >= here) { |
| int st = Math.max(start, here); |
| int en = Math.min(end, there); |
| |
| if (st != en) { |
| float h1 = getHorizontal(st, false, false, line); |
| float h2 = getHorizontal(en, true, false, line); |
| |
| dest.addRect(h1, top, h2, bottom, Path.Direction.CW); |
| } |
| } |
| |
| here = there; |
| } |
| } |
| |
| /** |
| * Fills in the specified Path with a representation of a highlight |
| * between the specified offsets. This will often be a rectangle |
| * or a potentially discontinuous set of rectangles. If the start |
| * and end are the same, the returned path is empty. |
| */ |
| public void getSelectionPath(int start, int end, Path dest) { |
| dest.reset(); |
| |
| if (start == end) |
| return; |
| |
| if (end < start) { |
| int temp = end; |
| end = start; |
| start = temp; |
| } |
| |
| int startline = getLineForOffset(start); |
| int endline = getLineForOffset(end); |
| |
| int top = getLineTop(startline); |
| int bottom = getLineBottom(endline); |
| |
| if (startline == endline) { |
| addSelection(startline, start, end, top, bottom, dest); |
| } else { |
| final float width = mWidth; |
| |
| addSelection(startline, start, getLineEnd(startline), |
| top, getLineBottom(startline), dest); |
| |
| if (getParagraphDirection(startline) == DIR_RIGHT_TO_LEFT) |
| dest.addRect(getLineLeft(startline), top, |
| 0, getLineBottom(startline), Path.Direction.CW); |
| else |
| dest.addRect(getLineRight(startline), top, |
| width, getLineBottom(startline), Path.Direction.CW); |
| |
| for (int i = startline + 1; i < endline; i++) { |
| top = getLineTop(i); |
| bottom = getLineBottom(i); |
| dest.addRect(0, top, width, bottom, Path.Direction.CW); |
| } |
| |
| top = getLineTop(endline); |
| bottom = getLineBottom(endline); |
| |
| addSelection(endline, getLineStart(endline), end, |
| top, bottom, dest); |
| |
| if (getParagraphDirection(endline) == DIR_RIGHT_TO_LEFT) |
| dest.addRect(width, top, getLineRight(endline), bottom, Path.Direction.CW); |
| else |
| dest.addRect(0, top, getLineLeft(endline), bottom, Path.Direction.CW); |
| } |
| } |
| |
| /** |
| * Get the alignment of the specified paragraph, taking into account |
| * markup attached to it. |
| */ |
| public final Alignment getParagraphAlignment(int line) { |
| Alignment align = mAlignment; |
| |
| if (mSpannedText) { |
| Spanned sp = (Spanned) mText; |
| AlignmentSpan[] spans = sp.getSpans(getLineStart(line), |
| getLineEnd(line), |
| AlignmentSpan.class); |
| |
| int spanLength = spans.length; |
| if (spanLength > 0) { |
| align = spans[spanLength-1].getAlignment(); |
| } |
| } |
| |
| return align; |
| } |
| |
| /** |
| * Get the left edge of the specified paragraph, inset by left margins. |
| */ |
| public final int getParagraphLeft(int line) { |
| int dir = getParagraphDirection(line); |
| |
| int left = 0; |
| |
| boolean par = false; |
| int off = getLineStart(line); |
| if (off == 0 || mText.charAt(off - 1) == '\n') |
| par = true; |
| |
| if (dir == DIR_LEFT_TO_RIGHT) { |
| if (mSpannedText) { |
| Spanned sp = (Spanned) mText; |
| LeadingMarginSpan[] spans = sp.getSpans(getLineStart(line), |
| getLineEnd(line), |
| LeadingMarginSpan.class); |
| |
| for (int i = 0; i < spans.length; i++) { |
| left += spans[i].getLeadingMargin(par); |
| } |
| } |
| } |
| |
| return left; |
| } |
| |
| /** |
| * Get the right edge of the specified paragraph, inset by right margins. |
| */ |
| public final int getParagraphRight(int line) { |
| int dir = getParagraphDirection(line); |
| |
| int right = mWidth; |
| |
| boolean par = false; |
| int off = getLineStart(line); |
| if (off == 0 || mText.charAt(off - 1) == '\n') |
| par = true; |
| |
| |
| if (dir == DIR_RIGHT_TO_LEFT) { |
| if (mSpannedText) { |
| Spanned sp = (Spanned) mText; |
| LeadingMarginSpan[] spans = sp.getSpans(getLineStart(line), |
| getLineEnd(line), |
| LeadingMarginSpan.class); |
| |
| for (int i = 0; i < spans.length; i++) { |
| right -= spans[i].getLeadingMargin(par); |
| } |
| } |
| } |
| |
| return right; |
| } |
| |
| private static void drawText(Canvas canvas, |
| CharSequence text, int start, int end, |
| int dir, Directions directions, |
| float x, int top, int y, int bottom, |
| TextPaint paint, |
| TextPaint workPaint, |
| boolean hasTabs, Object[] parspans) { |
| char[] buf; |
| if (!hasTabs) { |
| if (directions == DIRS_ALL_LEFT_TO_RIGHT) { |
| if (Config.DEBUG) { |
| Assert.assertTrue(DIR_LEFT_TO_RIGHT == dir); |
| } |
| Styled.drawText(canvas, text, start, end, dir, false, x, top, y, bottom, paint, workPaint, false); |
| return; |
| } |
| buf = null; |
| } else { |
| buf = TextUtils.obtain(end - start); |
| TextUtils.getChars(text, start, end, buf, 0); |
| } |
| |
| float h = 0; |
| |
| int here = 0; |
| for (int i = 0; i < directions.mDirections.length; i++) { |
| int there = here + directions.mDirections[i]; |
| if (there > end - start) |
| there = end - start; |
| |
| int segstart = here; |
| for (int j = hasTabs ? here : there; j <= there; j++) { |
| if (j == there || buf[j] == '\t') { |
| h += Styled.drawText(canvas, text, |
| start + segstart, start + j, |
| dir, (i & 1) != 0, x + h, |
| top, y, bottom, paint, workPaint, |
| start + j != end); |
| |
| if (j != there && buf[j] == '\t') |
| h = dir * nextTab(text, start, end, h * dir, parspans); |
| |
| segstart = j + 1; |
| } |
| } |
| |
| here = there; |
| } |
| |
| if (hasTabs) |
| TextUtils.recycle(buf); |
| } |
| |
| private static float measureText(TextPaint paint, |
| TextPaint workPaint, |
| CharSequence text, |
| int start, int offset, int end, |
| int dir, Directions directions, |
| boolean trailing, boolean alt, |
| boolean hasTabs, Object[] tabs) { |
| char[] buf = null; |
| |
| if (hasTabs) { |
| buf = TextUtils.obtain(end - start); |
| TextUtils.getChars(text, start, end, buf, 0); |
| } |
| |
| float h = 0; |
| |
| if (alt) { |
| if (dir == DIR_RIGHT_TO_LEFT) |
| trailing = !trailing; |
| } |
| |
| int here = 0; |
| for (int i = 0; i < directions.mDirections.length; i++) { |
| if (alt) |
| trailing = !trailing; |
| |
| int there = here + directions.mDirections[i]; |
| if (there > end - start) |
| there = end - start; |
| |
| int segstart = here; |
| for (int j = hasTabs ? here : there; j <= there; j++) { |
| if (j == there || buf[j] == '\t') { |
| float segw; |
| |
| if (offset < start + j || |
| (trailing && offset <= start + j)) { |
| if (dir == DIR_LEFT_TO_RIGHT && (i & 1) == 0) { |
| h += Styled.measureText(paint, workPaint, text, |
| start + segstart, offset, |
| null); |
| return h; |
| } |
| |
| if (dir == DIR_RIGHT_TO_LEFT && (i & 1) != 0) { |
| h -= Styled.measureText(paint, workPaint, text, |
| start + segstart, offset, |
| null); |
| return h; |
| } |
| } |
| |
| segw = Styled.measureText(paint, workPaint, text, |
| start + segstart, start + j, |
| null); |
| |
| if (offset < start + j || |
| (trailing && offset <= start + j)) { |
| if (dir == DIR_LEFT_TO_RIGHT) { |
| h += segw - Styled.measureText(paint, workPaint, |
| text, |
| start + segstart, |
| offset, null); |
| return h; |
| } |
| |
| if (dir == DIR_RIGHT_TO_LEFT) { |
| h -= segw - Styled.measureText(paint, workPaint, |
| text, |
| start + segstart, |
| offset, null); |
| return h; |
| } |
| } |
| |
| if (dir == DIR_RIGHT_TO_LEFT) |
| h -= segw; |
| else |
| h += segw; |
| |
| if (j != there && buf[j] == '\t') { |
| if (offset == start + j) |
| return h; |
| |
| h = dir * nextTab(text, start, end, h * dir, tabs); |
| } |
| |
| segstart = j + 1; |
| } |
| } |
| |
| here = there; |
| } |
| |
| if (hasTabs) |
| TextUtils.recycle(buf); |
| |
| return h; |
| } |
| |
| /* package */ static float measureText(TextPaint paint, |
| TextPaint workPaint, |
| CharSequence text, |
| int start, int end, |
| Paint.FontMetricsInt fm, |
| boolean hasTabs, Object[] tabs) { |
| char[] buf = null; |
| |
| if (hasTabs) { |
| buf = TextUtils.obtain(end - start); |
| TextUtils.getChars(text, start, end, buf, 0); |
| } |
| |
| int len = end - start; |
| |
| int here = 0; |
| float h = 0; |
| int ab = 0, be = 0; |
| int top = 0, bot = 0; |
| |
| if (fm != null) { |
| fm.ascent = 0; |
| fm.descent = 0; |
| } |
| |
| for (int i = hasTabs ? 0 : len; i <= len; i++) { |
| if (i == len || buf[i] == '\t') { |
| workPaint.baselineShift = 0; |
| |
| h += Styled.measureText(paint, workPaint, text, |
| start + here, start + i, |
| fm); |
| |
| if (fm != null) { |
| if (workPaint.baselineShift < 0) { |
| fm.ascent += workPaint.baselineShift; |
| fm.top += workPaint.baselineShift; |
| } else { |
| fm.descent += workPaint.baselineShift; |
| fm.bottom += workPaint.baselineShift; |
| } |
| } |
| |
| if (i != len) |
| h = nextTab(text, start, end, h, tabs); |
| |
| if (fm != null) { |
| if (fm.ascent < ab) { |
| ab = fm.ascent; |
| } |
| if (fm.descent > be) { |
| be = fm.descent; |
| } |
| |
| if (fm.top < top) { |
| top = fm.top; |
| } |
| if (fm.bottom > bot) { |
| bot = fm.bottom; |
| } |
| } |
| |
| here = i + 1; |
| } |
| } |
| |
| if (fm != null) { |
| fm.ascent = ab; |
| fm.descent = be; |
| fm.top = top; |
| fm.bottom = bot; |
| } |
| |
| if (hasTabs) |
| TextUtils.recycle(buf); |
| |
| return h; |
| } |
| |
| /* 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 = ((Spanned) text).getSpans(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; |
| } |
| |
| protected final boolean isSpanned() { |
| return mSpannedText; |
| } |
| |
| private void ellipsize(int start, int end, int line, |
| char[] dest, int destoff) { |
| int ellipsisCount = getEllipsisCount(line); |
| |
| if (ellipsisCount == 0) { |
| return; |
| } |
| |
| int ellipsisStart = getEllipsisStart(line); |
| int linestart = getLineStart(line); |
| |
| for (int i = ellipsisStart; i < ellipsisStart + ellipsisCount; i++) { |
| char c; |
| |
| if (i == ellipsisStart) { |
| c = '\u2026'; // ellipsis |
| } else { |
| c = '\uFEFF'; // 0-width space |
| } |
| |
| int a = i + linestart; |
| |
| if (a >= start && a < end) { |
| dest[destoff + a - start] = c; |
| } |
| } |
| } |
| |
| /** |
| * Stores information about bidirectional (left-to-right or right-to-left) |
| * text within the layout of a line. TODO: This work is not complete |
| * or correct and will be fleshed out in a later revision. |
| */ |
| public static class Directions { |
| private short[] mDirections; |
| |
| /* package */ Directions(short[] dirs) { |
| mDirections = dirs; |
| } |
| } |
| |
| /** |
| * Return the offset of the first character to be ellipsized away, |
| * relative to the start of the line. (So 0 if the beginning of the |
| * line is ellipsized, not getLineStart().) |
| */ |
| public abstract int getEllipsisStart(int line); |
| /** |
| * Returns the number of characters to be ellipsized away, or 0 if |
| * no ellipsis is to take place. |
| */ |
| public abstract int getEllipsisCount(int line); |
| |
| /* package */ static class Ellipsizer implements CharSequence, GetChars { |
| /* package */ CharSequence mText; |
| /* package */ Layout mLayout; |
| /* package */ int mWidth; |
| /* package */ TextUtils.TruncateAt mMethod; |
| |
| public Ellipsizer(CharSequence s) { |
| mText = s; |
| } |
| |
| public char charAt(int off) { |
| char[] buf = TextUtils.obtain(1); |
| getChars(off, off + 1, buf, 0); |
| char ret = buf[0]; |
| |
| TextUtils.recycle(buf); |
| return ret; |
| } |
| |
| public void getChars(int start, int end, char[] dest, int destoff) { |
| int line1 = mLayout.getLineForOffset(start); |
| int line2 = mLayout.getLineForOffset(end); |
| |
| TextUtils.getChars(mText, start, end, dest, destoff); |
| |
| for (int i = line1; i <= line2; i++) { |
| mLayout.ellipsize(start, end, i, dest, destoff); |
| } |
| } |
| |
| public int length() { |
| return mText.length(); |
| } |
| |
| public CharSequence subSequence(int start, int end) { |
| char[] s = new char[end - start]; |
| getChars(start, end, s, 0); |
| return new String(s); |
| } |
| |
| public String toString() { |
| char[] s = new char[length()]; |
| getChars(0, length(), s, 0); |
| return new String(s); |
| } |
| |
| } |
| |
| /* package */ static class SpannedEllipsizer |
| extends Ellipsizer implements Spanned { |
| private Spanned mSpanned; |
| |
| public SpannedEllipsizer(CharSequence display) { |
| super(display); |
| mSpanned = (Spanned) display; |
| } |
| |
| public <T> T[] getSpans(int start, int end, Class<T> type) { |
| return mSpanned.getSpans(start, end, type); |
| } |
| |
| public int getSpanStart(Object tag) { |
| return mSpanned.getSpanStart(tag); |
| } |
| |
| public int getSpanEnd(Object tag) { |
| return mSpanned.getSpanEnd(tag); |
| } |
| |
| public int getSpanFlags(Object tag) { |
| return mSpanned.getSpanFlags(tag); |
| } |
| |
| public int nextSpanTransition(int start, int limit, Class type) { |
| return mSpanned.nextSpanTransition(start, limit, type); |
| } |
| |
| public CharSequence subSequence(int start, int end) { |
| char[] s = new char[end - start]; |
| getChars(start, end, s, 0); |
| |
| SpannableString ss = new SpannableString(new String(s)); |
| TextUtils.copySpansFrom(mSpanned, start, end, Object.class, ss, 0); |
| return ss; |
| } |
| } |
| |
| private CharSequence mText; |
| private TextPaint mPaint; |
| /* package */ TextPaint mWorkPaint; |
| private int mWidth; |
| private Alignment mAlignment = Alignment.ALIGN_NORMAL; |
| private float mSpacingMult; |
| private float mSpacingAdd; |
| private static Rect sTempRect = new Rect(); |
| private boolean mSpannedText; |
| |
| public static final int DIR_LEFT_TO_RIGHT = 1; |
| public static final int DIR_RIGHT_TO_LEFT = -1; |
| |
| public enum Alignment { |
| ALIGN_NORMAL, |
| ALIGN_OPPOSITE, |
| ALIGN_CENTER, |
| // XXX ALIGN_LEFT, |
| // XXX ALIGN_RIGHT, |
| } |
| |
| private static final int TAB_INCREMENT = 20; |
| |
| /* package */ static final Directions DIRS_ALL_LEFT_TO_RIGHT = |
| new Directions(new short[] { 32767 }); |
| /* package */ static final Directions DIRS_ALL_RIGHT_TO_LEFT = |
| new Directions(new short[] { 0, 32767 }); |
| |
| } |
| |
