diff options
| -rw-r--r-- | core/java/android/text/Layout.java | 72 |
1 files changed, 52 insertions, 20 deletions
diff --git a/core/java/android/text/Layout.java b/core/java/android/text/Layout.java index 2c84ba005352..758cc82cf5ba 100644 --- a/core/java/android/text/Layout.java +++ b/core/java/android/text/Layout.java @@ -1678,20 +1678,22 @@ public abstract class Layout { } private void addSelection(int line, int start, int end, - int top, int bottom, Path dest) { + int top, int bottom, RectangleConsumer consumer) { int linestart = getLineStart(line); int lineend = getLineEnd(line); Directions dirs = getLineDirections(line); - if (lineend > linestart && mText.charAt(lineend - 1) == '\n') + if (lineend > linestart && mText.charAt(lineend - 1) == '\n') { lineend--; + } for (int i = 0; i < dirs.mDirections.length; i += 2) { int here = linestart + dirs.mDirections[i]; - int there = here + (dirs.mDirections[i+1] & RUN_LENGTH_MASK); + int there = here + (dirs.mDirections[i + 1] & RUN_LENGTH_MASK); - if (there > lineend) + if (there > lineend) { there = lineend; + } if (start <= there && end >= here) { int st = Math.max(start, here); @@ -1704,7 +1706,7 @@ public abstract class Layout { float left = Math.min(h1, h2); float right = Math.max(h1, h2); - dest.addRect(left, top, right, bottom, Path.Direction.CW); + consumer.accept(left, top, right, bottom); } } } @@ -1718,9 +1720,25 @@ public abstract class Layout { */ public void getSelectionPath(int start, int end, Path dest) { dest.reset(); + getSelection(start, end, (left, top, right, bottom) -> + dest.addRect(left, top, right, bottom, Path.Direction.CW)); + } - if (start == end) + /** + * Calculates the rectangles which should be highlighted to indicate a selection between start + * and end and feeds them into the given {@link RectangleConsumer}. + * + * @param start the starting index of the selection + * @param end the ending index of the selection + * @param consumer the {@link RectangleConsumer} which will receive the generated rectangles. It + * will be called every time a rectangle is generated. + * @hide + * @see #getSelectionPath(int, int, Path) + */ + public final void getSelection(int start, int end, final RectangleConsumer consumer) { + if (start == end) { return; + } if (end < start) { int temp = end; @@ -1735,35 +1753,35 @@ public abstract class Layout { int bottom = getLineBottomWithoutSpacing(endline); if (startline == endline) { - addSelection(startline, start, end, top, bottom, dest); + addSelection(startline, start, end, top, bottom, consumer); } else { final float width = mWidth; addSelection(startline, start, getLineEnd(startline), - top, getLineBottom(startline), dest); + top, getLineBottom(startline), consumer); - 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); + if (getParagraphDirection(startline) == DIR_RIGHT_TO_LEFT) { + consumer.accept(getLineLeft(startline), top, 0, getLineBottom(startline)); + } else { + consumer.accept(getLineRight(startline), top, width, getLineBottom(startline)); + } for (int i = startline + 1; i < endline; i++) { top = getLineTop(i); bottom = getLineBottom(i); - dest.addRect(0, top, width, bottom, Path.Direction.CW); + consumer.accept(0, top, width, bottom); } top = getLineTop(endline); bottom = getLineBottomWithoutSpacing(endline); - addSelection(endline, getLineStart(endline), end, top, bottom, dest); + addSelection(endline, getLineStart(endline), end, top, bottom, consumer); - 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); + if (getParagraphDirection(endline) == DIR_RIGHT_TO_LEFT) { + consumer.accept(width, top, getLineRight(endline), bottom); + } else { + consumer.accept(0, top, getLineLeft(endline), bottom); + } } } @@ -2262,4 +2280,18 @@ public abstract class Layout { public static final Directions DIRS_ALL_RIGHT_TO_LEFT = new Directions(new int[] { 0, RUN_LENGTH_MASK | RUN_RTL_FLAG }); + /** @hide */ + @FunctionalInterface + public interface RectangleConsumer { + /** + * Performs this operation on the given rectangle. + * + * @param left the left edge of the rectangle + * @param top the top edge of the rectangle + * @param right the right edge of the rectangle + * @param bottom the bottom edge of the rectangle + */ + void accept(float left, float top, float right, float bottom); + } + } |