Scroll edit text into view when keyboard shows. (312cad6e) · Commits · e / os / android_frameworks_base

core/java/android/webkit/WebViewClassic.java

+71 −0

Original line number	Diff line number	Diff line
		@@ -609,6 +609,10 @@ public final class WebViewClassic implements WebViewProvider, WebViewProvider.Sc
		// The presumed scroll rate for the first scroll of edit text
		static private final long TEXT_SCROLL_FIRST_SCROLL_MS = 16;

		// Buffer pixels of the caret rectangle when moving edit text into view
		// after resize.
		static private final int EDIT_RECT_BUFFER = 10;

		// true means redraw the screen all-the-time. Only with AUTO_REDRAW_HACK
		private boolean mAutoRedraw;

		@@ -5581,9 +5585,76 @@ public final class WebViewClassic implements WebViewProvider, WebViewProvider.Sc
		// However, do not update the base layer as that hasn't changed
		setNewPicture(mLoadedPicture, false);
		}
		if (mIsEditingText) {
		scrollEditIntoView();
		}
		relocateAutoCompletePopup();
		}

		/**
		* Scrolls the edit field into view using the minimum scrolling necessary.
		* If the edit field is too large to fit in the visible window, the caret
		* dimensions are used so that at least the caret is visible.
		* A buffer of EDIT_RECT_BUFFER in view pixels is used to offset the
		* edit rectangle to ensure a margin with the edge of the screen.
		*/
		private void scrollEditIntoView() {
		Rect visibleRect = new Rect(viewToContentX(getScrollX()),
		viewToContentY(getScrollY()),
		viewToContentX(getScrollX() + getWidth()),
		viewToContentY(getScrollY() + getViewHeightWithTitle()));
		if (visibleRect.contains(mEditTextContentBounds)) {
		return; // no need to scroll
		}
		syncSelectionCursors();
		final int buffer = Math.max(1, viewToContentDimension(EDIT_RECT_BUFFER));
		Rect showRect = new Rect(
		Math.max(0, mEditTextContentBounds.left - buffer),
		Math.max(0, mEditTextContentBounds.top - buffer),
		mEditTextContentBounds.right + buffer,
		mEditTextContentBounds.bottom + buffer);
		Point caretTop = calculateCaretTop();
		if (visibleRect.width() < mEditTextContentBounds.width()) {
		// The whole edit won't fit in the width, so use the caret rect
		if (mSelectCursorBase.x < caretTop.x) {
		showRect.left = Math.max(0, mSelectCursorBase.x - buffer);
		showRect.right = caretTop.x + buffer;
		} else {
		showRect.left = Math.max(0, caretTop.x - buffer);
		showRect.right = mSelectCursorBase.x + buffer;
		}
		}
		if (visibleRect.height() < mEditTextContentBounds.height()) {
		// The whole edit won't fit in the height, so use the caret rect
		if (mSelectCursorBase.y > caretTop.y) {
		showRect.top = Math.max(0, caretTop.y - buffer);
		showRect.bottom = mSelectCursorBase.y + buffer;
		} else {
		showRect.top = Math.max(0, mSelectCursorBase.y - buffer);
		showRect.bottom = caretTop.y + buffer;
		}
		}

		if (visibleRect.contains(showRect)) {
		return; // no need to scroll
		}

		int scrollX = visibleRect.left;
		if (visibleRect.left > showRect.left) {
		scrollX = showRect.left;
		} else if (visibleRect.right < showRect.right) {
		scrollX = Math.max(0, showRect.right - visibleRect.width());
		}
		int scrollY = visibleRect.top;
		if (visibleRect.top > showRect.top) {
		scrollY = showRect.top;
		} else if (visibleRect.bottom < showRect.bottom) {
		scrollY = Math.max(0, showRect.bottom - visibleRect.height());
		}

		contentScrollTo(scrollX, scrollY, false);
		}

		@Override
		public void onScrollChanged(int l, int t, int oldl, int oldt) {
		if (!mInOverScrollMode) {