Merge "Clean up popup window positioning" into nyc-dev (69a3345e) · Commits · e / os / android_frameworks_base

core/java/android/widget/PopupWindow.java

+49 −41

Original line number	Diff line number	Diff line
		@@ -1499,8 +1499,8 @@ public class PopupWindow {
		*
		* @param anchor the view on which the popup window must be anchored
		* @param outParams the layout parameters used to display the drop down
		* @param xOffset horizontal offset used to adjust for background padding
		* @param yOffset vertical offset used to adjust for background padding
		* @param xOffset absolute horizontal offset from the top of the anchor
		* @param yOffset absolute vertical offset from the top of the anchor
		* @param gravity horizontal gravity specifying popup alignment
		* @return true if the popup is translated upwards to fit on screen
		*/
		@@ -1512,19 +1512,21 @@ public class PopupWindow {
		yOffset -= anchorHeight;
		}

		// Initially, align to the bottom-left corner of the anchor plus offsets.
		final int[] drawingLocation = mTmpDrawingLocation;
		anchor.getLocationInWindow(drawingLocation);
		outParams.x = drawingLocation[0] + xOffset;
		outParams.y = drawingLocation[1] + anchorHeight + yOffset;

		// If we need to adjust for gravity RIGHT, align to the bottom-right
		// corner of the anchor (still accounting for offsets).
		final int hgrav = Gravity.getAbsoluteGravity(gravity, anchor.getLayoutDirection())
		& Gravity.HORIZONTAL_GRAVITY_MASK;
		if (hgrav == Gravity.RIGHT) {
		// Flip the location to align the right sides of the popup and
		// anchor instead of left.
		outParams.x -= width - anchorWidth;
		}

		// Let the window manager know to align the top to y.
		outParams.gravity = Gravity.LEFT \| Gravity.TOP;

		final int[] screenLocation = mTmpScreenLocation;
		@@ -1533,14 +1535,15 @@ public class PopupWindow {
		final Rect displayFrame = new Rect();
		anchor.getWindowVisibleDisplayFrame(displayFrame);

		final boolean onTop;
		final int screenY = screenLocation[1] + anchorHeight + yOffset;
		boolean onTop = false;

		final View root = anchor.getRootView();
		if (screenY + height > displayFrame.bottom
		\|\| outParams.x + width - root.getWidth() > 0) {
		// If the drop down disappears at the bottom of the screen, we try
		// to scroll a parent scrollview or move the drop down back up on
		// top of the edit box.
		final int screenY = screenLocation[1] + anchorHeight + yOffset;
		final boolean tooFarDown = screenY + height > displayFrame.bottom;
		final boolean tooFarRight = outParams.x + width > root.getWidth();
		if (tooFarDown \|\| tooFarRight) {
		// If the popup extends beyond the visible area, try to scroll the
		// parent so that it is fully visible.
		if (mAllowScrollingAnchorParent) {
		final int scrollX = anchor.getScrollX();
		final int scrollY = anchor.getScrollY();
		@@ -1549,8 +1552,7 @@ public class PopupWindow {
		anchor.requestRectangleOnScreen(r, true);
		}

		// Now we re-evaluate the space available, and decide from that
		// whether the pop-up will go above or below the anchor.
		// Update for the new anchor position.
		anchor.getLocationInWindow(drawingLocation);
		outParams.x = drawingLocation[0] + xOffset;
		outParams.y = drawingLocation[1] + anchorHeight + yOffset;
		@@ -1560,25 +1562,30 @@ public class PopupWindow {
		outParams.x -= width - anchorWidth;
		}

		// Determine whether there is more space above or below the anchor.
		final int newScreenY = screenLocation[1] + anchorHeight + yOffset;
		final boolean stillTooFarDown = newScreenY + height > displayFrame.bottom;
		if (stillTooFarDown) {
		// If the popup is still too far down, re-evaluate the space
		// available and decide whether the pop-up will go above or
		// below the anchor.
		anchor.getLocationOnScreen(screenLocation);
		final int spaceBelow = displayFrame.bottom - screenLocation[1] - anchorHeight - yOffset;
		final int spaceAbove = screenLocation[1] - yOffset - displayFrame.top;
		onTop = spaceBelow < spaceAbove;

		if (!mOverlapAnchor) {
		final int below = displayFrame.bottom - screenLocation[1] - anchorHeight - yOffset;
		final int above = screenLocation[1] - displayFrame.top + yOffset;
		onTop = above > below;

		if (onTop) {
		outParams.gravity = Gravity.LEFT \| Gravity.BOTTOM;
		outParams.y = root.getHeight() - drawingLocation[1] + yOffset;
		} else {
		outParams.y = drawingLocation[1] + anchorHeight + yOffset;
		// Move everything up.
		if (mOverlapAnchor) {
		yOffset += anchorHeight;
		}
		outParams.y = drawingLocation[1] - height + yOffset;
		}
		}
		} else {
		onTop = false;
		}

		if (mClipToScreen) {
		// Use screen coordinates for comparison against display frame.
		final int winOffsetX = screenLocation[0] - drawingLocation[0];
		final int winOffsetY = screenLocation[1] - drawingLocation[1];
		outParams.x += winOffsetX;
		@@ -1586,30 +1593,32 @@ public class PopupWindow {

		final int right = outParams.x + width;
		if (right > displayFrame.right) {
		// The popup is too far right, move it back in.
		outParams.x -= right - displayFrame.right;
		}

		if (outParams.x < displayFrame.left) {
		// The popup is too far left, move it back in and clip if it's
		// still too large.
		outParams.x = displayFrame.left;

		final int displayFrameWidth = displayFrame.right - displayFrame.left;
		final int displayFrameWidth = displayFrame.width();
		width = Math.min(width, displayFrameWidth);
		}

		if (mOverlapAnchor) {
		final int bottom = outParams.y + width;
		final int bottom = outParams.y + height;
		if (bottom > displayFrame.bottom) {
		// The popup is too far down, move it back in.
		outParams.y -= bottom - displayFrame.bottom;
		}
		} else {
		if (onTop) {
		final int popupTop = screenLocation[1] + yOffset - height;
		if (popupTop < 0) {
		outParams.y += popupTop;
		}
		} else {
		outParams.y = Math.max(outParams.y, displayFrame.top);
		}

		if (outParams.y < displayFrame.top) {
		// The popup is too far up, move it back in and clip if
		// it's still too large.
		outParams.y = displayFrame.top;

		final int displayFrameHeight = displayFrame.height();
		height = Math.min(height, displayFrameHeight);
		}

		outParams.x -= winOffsetX;
		@@ -1618,7 +1627,6 @@ public class PopupWindow {

		outParams.width = width;
		outParams.height = height;
		outParams.gravity \|= Gravity.DISPLAY_CLIP_VERTICAL;

		return onTop;
		}