Control, Shift and Arrow Key functionality for Chromebook (#20204)
* added keyboard functionatliy to android builds * Added tests * almost ready for review * ready for review * Fixes * final comments * final commit * removing raw keyboard changes * removing raw keyboard changes * removing raw keyboard changes * actual last commit * fixed the imports * a few more changes * A few more changes * a few changes * Final changes * Final changes2 * final actual commit for real * final actual commit for real2 * final actual commit for real3 * final actual commit for real4 * final * final 2 * f * f2 * fin * fin 2 * fin3 * fin4
This commit is contained in:
jslavitz
GitHub
parent
dc5a5c18a9
commit
3900d42bfa
@ -198,6 +198,186 @@ class RenderEditable extends RenderBox {
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Rect _lastCaretRect;
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Rect _lastCaretRect;
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static const int _kLeftArrowCode = 21;
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static const int _kRightArrowCode = 22;
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static const int _kUpArrowCode = 19;
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static const int _kDownArrowCode = 20;
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// The extent offset of the current selection
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int _extentOffset = -1;
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// The base offset of the current selection
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int _baseOffset = -1;
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// Holds the last location the user selected in the case that he selects all
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// the way to the end or beginning of the field.
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int _previousCursorLocation = -1;
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// Whether we should reset the location of the cursor in the case the user
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// selects all the way to the end or the beginning of a field.
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bool _resetCursor = false;
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static const int _kShiftMask = 1; // https://developer.android.com/reference/android/view/KeyEvent.html#META_SHIFT_ON
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static const int _kControlMask = 1 << 12; // https://developer.android.com/reference/android/view/KeyEvent.html#META_CTRL_ON
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// TODO(goderbauer): doesn't handle extended grapheme clusters with more than one Unicode scalar value (https://github.com/flutter/flutter/issues/13404).
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void _handleKeyEvent(RawKeyEvent keyEvent){
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if (defaultTargetPlatform != TargetPlatform.android)
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return;
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if (keyEvent is RawKeyUpEvent)
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return;
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final RawKeyEventDataAndroid rawAndroidEvent = keyEvent.data;
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final int pressedKeyCode = rawAndroidEvent.keyCode;
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final int pressedKeyMetaState = rawAndroidEvent.metaState;
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if (selection.isCollapsed) {
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_extentOffset = selection.extentOffset;
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_baseOffset = selection.baseOffset;
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}
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// Update current key states
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final bool shift = pressedKeyMetaState & _kShiftMask > 0;
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final bool ctrl = pressedKeyMetaState & _kControlMask > 0;
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final bool rightArrow = pressedKeyCode == _kRightArrowCode;
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final bool leftArrow = pressedKeyCode == _kLeftArrowCode;
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final bool upArrow = pressedKeyCode == _kUpArrowCode;
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final bool downArrow = pressedKeyCode == _kDownArrowCode;
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final bool arrow = leftArrow || rightArrow || upArrow || downArrow;
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// We will only move select or more the caret if an arrow is pressed
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if (arrow) {
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int newOffset = _extentOffset;
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// Because the user can use multiple keys to change how he selects
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// the new offset variable is threaded through these four functions
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// and potentially changes after each one.
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if (ctrl)
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newOffset = _handleControl(rightArrow, leftArrow, ctrl, newOffset);
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newOffset = _handleHorizontalArrows(rightArrow, leftArrow, shift, newOffset);
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if (downArrow || upArrow)
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newOffset = _handleVerticalArrows(upArrow, downArrow, shift, newOffset);
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newOffset = _handleShift(rightArrow, leftArrow, shift, newOffset);
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_extentOffset = newOffset;
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}
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}
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// Handles full word traversal using control.
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int _handleControl(bool rightArrow, bool leftArrow, bool ctrl, int newOffset) {
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// If control is pressed, we will decide which way to look for a word
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// based on which arrow is pressed.
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if (leftArrow && _extentOffset > 2) {
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final TextSelection textSelection = _selectWordAtOffset(new TextPosition(offset: _extentOffset - 2));
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newOffset = textSelection.baseOffset + 1;
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} else if (rightArrow && _extentOffset < text.text.length - 2) {
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final TextSelection textSelection = _selectWordAtOffset(new TextPosition(offset: _extentOffset + 1));
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newOffset = textSelection.extentOffset - 1;
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}
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return newOffset;
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}
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int _handleHorizontalArrows(bool rightArrow, bool leftArrow, bool shift, int newOffset) {
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// Set the new offset to be +/- 1 depending on which arrow is pressed
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// If shift is down, we also want to update the previous cursor location
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if (rightArrow && _extentOffset < text.text.length) {
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newOffset += 1;
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if (shift)
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_previousCursorLocation += 1;
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}
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if (leftArrow && _extentOffset > 0) {
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newOffset -= 1;
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if (shift)
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_previousCursorLocation -= 1;
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}
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return newOffset;
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}
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// Handles moving the cursor vertically as well as taking care of the
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// case where the user moves the cursor to the end or beginning of the text
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// and then back up or down.
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int _handleVerticalArrows(bool upArrow, bool downArrow, bool shift, int newOffset) {
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// The caret offset gives a location in the upper left hand corner of
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// the caret so the middle of the line above is a half line above that
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// point and the line below is 1.5 lines below that point.
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final double plh = _textPainter.preferredLineHeight;
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final double verticalOffset = upArrow ? -0.5 * plh : 1.5 * plh;
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final Offset caretOffset = _textPainter.getOffsetForCaret(new TextPosition(offset: _extentOffset), _caretPrototype);
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final Offset caretOffsetTranslated = caretOffset.translate(0.0, verticalOffset);
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final TextPosition position = _textPainter.getPositionForOffset(caretOffsetTranslated);
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// To account for the possibility where the user vertically highlights
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// all the way to the top or bottom of the text, we hold the previous
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// cursor location. This allows us to restore to this position in the
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// case that the user wants to unhighlight some text.
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if (position.offset == _extentOffset) {
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if (downArrow)
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newOffset = text.text.length;
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else if (upArrow)
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newOffset = 0;
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_resetCursor = shift;
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} else if (_resetCursor && shift) {
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newOffset = _previousCursorLocation;
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_resetCursor = false;
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} else {
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newOffset = position.offset;
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_previousCursorLocation = newOffset;
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}
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return newOffset;
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}
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// Handles the selection of text or removal of the selection and placing
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// of the caret.
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int _handleShift(bool rightArrow, bool leftArrow, bool shift, int newOffset) {
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if (onSelectionChanged == null)
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return newOffset;
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// In the text_selection class, a TextSelection is defined such that the
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// base offset is always less than the extent offset.
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if (shift) {
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if (_baseOffset < newOffset) {
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onSelectionChanged(
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new TextSelection(
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baseOffset: _baseOffset,
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extentOffset: newOffset
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),
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this,
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SelectionChangedCause.keyboard,
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);
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} else {
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onSelectionChanged(
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new TextSelection(
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baseOffset: newOffset,
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extentOffset: _baseOffset
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),
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this,
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SelectionChangedCause.keyboard,
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);
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}
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} else {
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// We want to put the cursor at the correct location depending on which
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// arrow is used while there is a selection.
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if (!selection.isCollapsed) {
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if (leftArrow)
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newOffset = _baseOffset < _extentOffset ? _baseOffset : _extentOffset;
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else if (rightArrow)
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newOffset = _baseOffset > _extentOffset ? _baseOffset : _extentOffset;
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}
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onSelectionChanged(
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new TextSelection.fromPosition(
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new TextPosition(
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offset: newOffset
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)
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),
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this,
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SelectionChangedCause.keyboard,
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);
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}
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return newOffset;
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}
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/// Marks the render object as needing to be laid out again and have its text
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/// Marks the render object as needing to be laid out again and have its text
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/// metrics recomputed.
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/// metrics recomputed.
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///
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///
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@ -300,11 +480,23 @@ class RenderEditable extends RenderBox {
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/// Whether the editable is currently focused.
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/// Whether the editable is currently focused.
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bool get hasFocus => _hasFocus;
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bool get hasFocus => _hasFocus;
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bool _hasFocus;
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bool _hasFocus;
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bool _listenerAttached = false;
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set hasFocus(bool value) {
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set hasFocus(bool value) {
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assert(value != null);
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assert(value != null);
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if (_hasFocus == value)
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if (_hasFocus == value)
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return;
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return;
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_hasFocus = value;
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_hasFocus = value;
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if (_hasFocus) {
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assert(!_listenerAttached);
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RawKeyboard.instance.addListener(_handleKeyEvent);
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_listenerAttached = true;
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}
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else {
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assert(_listenerAttached);
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RawKeyboard.instance.removeListener(_handleKeyEvent);
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_listenerAttached = false;
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}
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markNeedsSemanticsUpdate();
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markNeedsSemanticsUpdate();
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}
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}
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@ -574,6 +766,8 @@ class RenderEditable extends RenderBox {
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void detach() {
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void detach() {
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_offset.removeListener(markNeedsPaint);
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_offset.removeListener(markNeedsPaint);
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_showCursor.removeListener(markNeedsPaint);
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_showCursor.removeListener(markNeedsPaint);
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if (_listenerAttached)
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RawKeyboard.instance.removeListener(_handleKeyEvent);
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super.detach();
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super.detach();
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}
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}
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@ -1764,6 +1764,316 @@ void main() {
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semantics.dispose();
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semantics.dispose();
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});
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});
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void sendFakeKeyEvent(Map<String, dynamic> data) {
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BinaryMessages.handlePlatformMessage(
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SystemChannels.keyEvent.name,
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SystemChannels.keyEvent.codec.encodeMessage(data),
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(ByteData data) { },
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);
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}
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void sendKeyEventWithCode(int code, bool down, bool shiftDown, bool ctrlDown) {
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int metaState = shiftDown ? 1 : 0;
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if (ctrlDown)
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metaState |= 1 << 12;
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sendFakeKeyEvent(<String, dynamic>{
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'type': down ? 'keydown' : 'keyup',
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'keymap': 'android',
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'keyCode' : code,
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'hidUsage': 0x04,
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'codePoint': 0x64,
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'metaState': metaState,
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});
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}
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group('Keyboard Tests', (){
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TextEditingController controller;
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setUp( () {
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controller = new TextEditingController();
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});
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MaterialApp setupWidget() {
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final FocusNode focusNode = new FocusNode();
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controller = new TextEditingController();
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return new MaterialApp(
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home: Material(
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child: new RawKeyboardListener(
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focusNode: focusNode,
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onKey: null,
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child: TextField(
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controller: controller,
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maxLines: 3,
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),
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) ,
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),
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);
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}
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testWidgets('Shift test 1', (WidgetTester tester) async{
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await tester.pumpWidget(setupWidget());
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const String testValue = 'a big house';
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await tester.enterText(find.byType(TextField), testValue);
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await tester.idle();
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await tester.tap(find.byType(TextField));
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await tester.pumpAndSettle();
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sendKeyEventWithCode(22, true, true, false); // RIGHT_ARROW keydown, SHIFT_ON
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expect(controller.selection.extentOffset - controller.selection.baseOffset, 1);
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});
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testWidgets('Control Shift test', (WidgetTester tester) async{
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await tester.pumpWidget(setupWidget());
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const String testValue = 'their big house';
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await tester.enterText(find.byType(TextField), testValue);
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await tester.idle();
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await tester.tap(find.byType(TextField));
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await tester.pumpAndSettle();
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await tester.pumpAndSettle();
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sendKeyEventWithCode(22, true, true, true); // RIGHT_ARROW keydown SHIFT_ON, CONTROL_ON
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await tester.pumpAndSettle();
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expect(controller.selection.extentOffset - controller.selection.baseOffset, 5);
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});
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testWidgets('Down and up test', (WidgetTester tester) async{
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await tester.pumpWidget(setupWidget());
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const String testValue = 'a big house';
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await tester.enterText(find.byType(TextField), testValue);
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await tester.idle();
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await tester.tap(find.byType(TextField));
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await tester.pumpAndSettle();
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sendKeyEventWithCode(20, true, true, false); // DOWN_ARROW keydown
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await tester.pumpAndSettle();
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expect(controller.selection.extentOffset - controller.selection.baseOffset, 11);
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sendKeyEventWithCode(20, false, true, false); // DOWN_ARROW keyup
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await tester.pumpAndSettle();
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sendKeyEventWithCode(19, true, true, false); // UP_ARROW keydown
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await tester.pumpAndSettle();
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expect(controller.selection.extentOffset - controller.selection.baseOffset, 0);
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});
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testWidgets('Down and up test 2', (WidgetTester tester) async{
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await tester.pumpWidget(setupWidget());
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const String testValue = 'a big house\njumped over a mouse\nOne more line yay'; // 11 \n 19
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await tester.enterText(find.byType(TextField), testValue);
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await tester.idle();
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await tester.tap(find.byType(TextField));
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await tester.pumpAndSettle();
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for (int i = 0; i < 5; i += 1) {
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sendKeyEventWithCode(22, true, false, false); // RIGHT_ARROW keydown
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await tester.pumpAndSettle();
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sendKeyEventWithCode(22, false, false, false); // RIGHT_ARROW keyup
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await tester.pumpAndSettle();
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}
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sendKeyEventWithCode(20, true, true, false); // DOWN_ARROW keydown
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await tester.pumpAndSettle();
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sendKeyEventWithCode(20, false, true, false); // DOWN_ARROW keyup
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await tester.pumpAndSettle();
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expect(controller.selection.extentOffset - controller.selection.baseOffset, 12);
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sendKeyEventWithCode(20, true, true, false); // DOWN_ARROW keydown
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await tester.pumpAndSettle();
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sendKeyEventWithCode(20, false, true, false); // DOWN_ARROW keyup
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await tester.pumpAndSettle();
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expect(controller.selection.extentOffset - controller.selection.baseOffset, 32);
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sendKeyEventWithCode(19, true, true, false); // UP_ARROW keydown
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await tester.pumpAndSettle();
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sendKeyEventWithCode(19, false, true, false); // UP_ARROW keyup
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await tester.pumpAndSettle();
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expect(controller.selection.extentOffset - controller.selection.baseOffset, 12);
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sendKeyEventWithCode(19, true, true, false); // UP_ARROW keydown
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await tester.pumpAndSettle();
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sendKeyEventWithCode(19, false, true, false); // UP_ARROW keyup
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await tester.pumpAndSettle();
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||||||
|
|
||||||
|
expect(controller.selection.extentOffset - controller.selection.baseOffset, 0);
|
||||||
|
|
||||||
|
sendKeyEventWithCode(19, true, true, false); // UP_ARROW keydown
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
sendKeyEventWithCode(19, false, true, false); // UP_ARROW keyup
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
|
||||||
|
expect(controller.selection.extentOffset - controller.selection.baseOffset, 5);
|
||||||
|
});
|
||||||
|
});
|
||||||
|
|
||||||
|
testWidgets('Changing positions of text fields', (WidgetTester tester) async{
|
||||||
|
|
||||||
|
final FocusNode focusNode = new FocusNode();
|
||||||
|
final List<RawKeyEvent> events = <RawKeyEvent>[];
|
||||||
|
|
||||||
|
final TextEditingController c1 = new TextEditingController();
|
||||||
|
final TextEditingController c2 = new TextEditingController();
|
||||||
|
final Key key1 = new UniqueKey();
|
||||||
|
final Key key2 = new UniqueKey();
|
||||||
|
|
||||||
|
await tester.pumpWidget(
|
||||||
|
new MaterialApp(
|
||||||
|
home:
|
||||||
|
Material(
|
||||||
|
child: new RawKeyboardListener(
|
||||||
|
focusNode: focusNode,
|
||||||
|
onKey: events.add,
|
||||||
|
child: new Column(
|
||||||
|
crossAxisAlignment: CrossAxisAlignment.stretch,
|
||||||
|
children: <Widget>[
|
||||||
|
TextField(
|
||||||
|
key: key1,
|
||||||
|
controller: c1,
|
||||||
|
maxLines: 3,
|
||||||
|
),
|
||||||
|
TextField(
|
||||||
|
key: key2,
|
||||||
|
controller: c2,
|
||||||
|
maxLines: 3,
|
||||||
|
),
|
||||||
|
],
|
||||||
|
),
|
||||||
|
),
|
||||||
|
),
|
||||||
|
),
|
||||||
|
);
|
||||||
|
|
||||||
|
const String testValue = 'a big house';
|
||||||
|
await tester.enterText(find.byType(TextField).first, testValue);
|
||||||
|
|
||||||
|
await tester.idle();
|
||||||
|
await tester.tap(find.byType(TextField).first);
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
|
||||||
|
for (int i = 0; i < 5; i += 1) {
|
||||||
|
sendKeyEventWithCode(22, true, true, false); // RIGHT_ARROW keydown
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
}
|
||||||
|
|
||||||
|
expect(c1.selection.extentOffset - c1.selection.baseOffset, 5);
|
||||||
|
|
||||||
|
await tester.pumpWidget(
|
||||||
|
new MaterialApp(
|
||||||
|
home:
|
||||||
|
Material(
|
||||||
|
child: new RawKeyboardListener(
|
||||||
|
focusNode: focusNode,
|
||||||
|
onKey: events.add,
|
||||||
|
child: new Column(
|
||||||
|
crossAxisAlignment: CrossAxisAlignment.stretch,
|
||||||
|
children: <Widget>[
|
||||||
|
TextField(
|
||||||
|
key: key2,
|
||||||
|
controller: c2,
|
||||||
|
maxLines: 3,
|
||||||
|
),
|
||||||
|
TextField(
|
||||||
|
key: key1,
|
||||||
|
controller: c1,
|
||||||
|
maxLines: 3,
|
||||||
|
),
|
||||||
|
],
|
||||||
|
),
|
||||||
|
),
|
||||||
|
),
|
||||||
|
),
|
||||||
|
);
|
||||||
|
|
||||||
|
for (int i = 0; i < 5; i += 1) {
|
||||||
|
sendKeyEventWithCode(22, true, true, false); // RIGHT_ARROW keydown
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
}
|
||||||
|
|
||||||
|
expect(c1.selection.extentOffset - c1.selection.baseOffset, 10);
|
||||||
|
});
|
||||||
|
|
||||||
|
|
||||||
|
testWidgets('Changing focus test', (WidgetTester tester) async {
|
||||||
|
final FocusNode focusNode = new FocusNode();
|
||||||
|
final List<RawKeyEvent> events = <RawKeyEvent>[];
|
||||||
|
|
||||||
|
final TextEditingController c1 = new TextEditingController();
|
||||||
|
final TextEditingController c2 = new TextEditingController();
|
||||||
|
final Key key1 = new UniqueKey();
|
||||||
|
final Key key2 = new UniqueKey();
|
||||||
|
|
||||||
|
await tester.pumpWidget(
|
||||||
|
new MaterialApp(
|
||||||
|
home:
|
||||||
|
Material(
|
||||||
|
child: new RawKeyboardListener(
|
||||||
|
focusNode: focusNode,
|
||||||
|
onKey: events.add,
|
||||||
|
child: new Column(
|
||||||
|
crossAxisAlignment: CrossAxisAlignment.stretch,
|
||||||
|
children: <Widget>[
|
||||||
|
TextField(
|
||||||
|
key: key1,
|
||||||
|
controller: c1,
|
||||||
|
maxLines: 3,
|
||||||
|
),
|
||||||
|
TextField(
|
||||||
|
key: key2,
|
||||||
|
controller: c2,
|
||||||
|
maxLines: 3,
|
||||||
|
),
|
||||||
|
],
|
||||||
|
),
|
||||||
|
),
|
||||||
|
),
|
||||||
|
),
|
||||||
|
);
|
||||||
|
|
||||||
|
await tester.idle();
|
||||||
|
await tester.tap(find.byType(TextField).first);
|
||||||
|
|
||||||
|
const String testValue = 'a big house';
|
||||||
|
await tester.enterText(find.byType(TextField).first, testValue);
|
||||||
|
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
|
||||||
|
for (int i = 0; i < 5; i += 1) {
|
||||||
|
sendKeyEventWithCode(22, true, true, false); // RIGHT_ARROW keydown
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
}
|
||||||
|
|
||||||
|
expect(c1.selection.extentOffset - c1.selection.baseOffset, 5);
|
||||||
|
expect(c2.selection.extentOffset - c2.selection.baseOffset, 0);
|
||||||
|
|
||||||
|
await tester.idle();
|
||||||
|
await tester.tap(find.byType(TextField).last);
|
||||||
|
|
||||||
|
await tester.enterText(find.byType(TextField).last, testValue);
|
||||||
|
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
|
||||||
|
for (int i = 0; i < 5; i += 1) {
|
||||||
|
sendKeyEventWithCode(22, true, true, false); // RIGHT_ARROW keydown
|
||||||
|
await tester.pumpAndSettle();
|
||||||
|
}
|
||||||
|
|
||||||
|
expect(c1.selection.extentOffset - c1.selection.baseOffset, 0);
|
||||||
|
expect(c2.selection.extentOffset - c2.selection.baseOffset, 5);
|
||||||
|
});
|
||||||
|
|
||||||
testWidgets('Caret works when maxLines is null', (WidgetTester tester) async {
|
testWidgets('Caret works when maxLines is null', (WidgetTester tester) async {
|
||||||
final TextEditingController controller = new TextEditingController();
|
final TextEditingController controller = new TextEditingController();
|
||||||
|
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user