/// <summary>
/// Gets the meta state used for movement using the modifiers tracked by the text
/// buffer as well as those present in the key event.
/// </summary>
/// <remarks>
/// Gets the meta state used for movement using the modifiers tracked by the text
/// buffer as well as those present in the key event.
/// The movement meta state excludes the state of locked modifiers or the SHIFT key
/// since they are not used by movement actions (but they may be used for selection).
/// </remarks>
/// <param name="buffer">The text buffer.</param>
/// <param name="event">The key event.</param>
/// <returns>The keyboard meta states used for movement.</returns>
protected internal virtual int getMovementMetaState(android.text.Spannable buffer
, android.view.KeyEvent @event)
{
// We ignore locked modifiers and SHIFT.
int metaState = (@event.getMetaState() | android.text.method.MetaKeyKeyListener.getMetaState
(buffer)) & ~(android.text.method.MetaKeyKeyListener.META_ALT_LOCKED | android.text.method.MetaKeyKeyListener
.META_SYM_LOCKED);
return android.view.KeyEvent.normalizeMetaState(metaState) & ~android.view.KeyEvent
.META_SHIFT_MASK;
}
private bool backspaceOrForwardDelete(android.view.View view, android.text.Editable
content, int keyCode, android.view.KeyEvent @event, bool isForwardDelete)
{
// Ensure the key event does not have modifiers except ALT or SHIFT.
if (!android.view.KeyEvent.metaStateHasNoModifiers(@event.getMetaState() & ~(android.view.KeyEvent
.META_SHIFT_MASK | android.view.KeyEvent.META_ALT_MASK)))
{
return(false);
}
// If there is a current selection, delete it.
if (deleteSelection(view, content))
{
return(true);
}
// Alt+Backspace or Alt+ForwardDelete deletes the current line, if possible.
if (@event.isAltPressed() || getMetaState(content, META_ALT_ON) == 1)
{
if (deleteLine(view, content))
{
return(true);
}
}
// Delete a character.
int start = android.text.Selection.getSelectionEnd(content);
int end;
if (isForwardDelete || @event.isShiftPressed() || getMetaState(content, META_SHIFT_ON
) == 1)
{
end = android.text.TextUtils.getOffsetAfter(content, start);
}
else
{
end = android.text.TextUtils.getOffsetBefore(content, start);
}
if (start != end)
{
content.delete(System.Math.Min(start, end), System.Math.Max(start, end));
return(true);
}
return(false);
}
/// <summary>Checks a key event.</summary>
/// <remarks>Checks a key event.</remarks>
/// <param name="event">The event.</param>
/// <param name="nestingLevel">
/// The nesting level: 0 if called from the base class,
/// or 1 from a subclass. If the event was already checked by this consistency verifier
/// at a higher nesting level, it will not be checked again. Used to handle the situation
/// where a subclass dispatching method delegates to its superclass's dispatching method
/// and both dispatching methods call into the consistency verifier.
/// </param>
public void onKeyEvent(android.view.KeyEvent @event, int nestingLevel)
{
if (!startEvent(@event, nestingLevel, EVENT_TYPE_KEY))
{
return;
}
try
{
ensureMetaStateIsNormalized(@event.getMetaState());
int action = @event.getAction();
int deviceId = @event.getDeviceId();
int source = @event.getSource();
int keyCode = @event.getKeyCode();
switch (action)
{
case android.view.KeyEvent.ACTION_DOWN:
{
android.view.InputEventConsistencyVerifier.KeyState state = findKeyState(deviceId
, source, keyCode, false);
if (state != null)
{
// If the key is already down, ensure it is a repeat.
// We don't perform this check when processing raw device input
// because the input dispatcher itself is responsible for setting
// the key repeat count before it delivers input events.
if (state.unhandled)
{
state.unhandled = false;
}
else
{
if ((mFlags & FLAG_RAW_DEVICE_INPUT) == 0 && @event.getRepeatCount() == 0)
{
problem("ACTION_DOWN but key is already down and this event " + "is not a key repeat."
);
}
}
}
else
{
addKeyState(deviceId, source, keyCode);
}
break;
}
case android.view.KeyEvent.ACTION_UP:
{
android.view.InputEventConsistencyVerifier.KeyState state = findKeyState(deviceId
, source, keyCode, true);
if (state == null)
{
problem("ACTION_UP but key was not down.");
}
else
{
state.recycle();
}
break;
}
case android.view.KeyEvent.ACTION_MULTIPLE:
{
break;
}
default:
{
problem("Invalid action " + android.view.KeyEvent.actionToString(action) + " for key event."
);
break;
}
}
}
finally
{
finishEvent();
}
}
public override bool onKeyDown(android.view.View view, android.text.Editable content
, int keyCode, android.view.KeyEvent @event)
{
int selStart;
int selEnd;
int pref = 0;
if (view != null)
{
pref = android.text.method.TextKeyListener.getInstance().getPrefs(view.getContext
());
}
{
int a = android.text.Selection.getSelectionStart(content);
int b = android.text.Selection.getSelectionEnd(content);
selStart = System.Math.Min(a, b);
selEnd = System.Math.Max(a, b);
if (selStart < 0 || selEnd < 0)
{
selStart = selEnd = 0;
android.text.Selection.setSelection(content, 0, 0);
}
}
int activeStart = content.getSpanStart(android.text.method.TextKeyListener.ACTIVE
);
int activeEnd = content.getSpanEnd(android.text.method.TextKeyListener.ACTIVE);
// QWERTY keyboard normal case
int i = @event.getUnicodeChar(@event.getMetaState() | getMetaState(content));
if (!mFullKeyboard)
{
int count = @event.getRepeatCount();
if (count > 0 && selStart == selEnd && selStart > 0)
{
char c = content[selStart - 1];
if (c == i || c == Sharpen.CharHelper.ToUpper(i) && view != null)
{
if (showCharacterPicker(view, content, c, false, count))
{
resetMetaState(content);
return(true);
}
}
}
}
if (i == android.view.KeyCharacterMap.PICKER_DIALOG_INPUT)
{
if (view != null)
{
showCharacterPicker(view, content, android.view.KeyCharacterMap.PICKER_DIALOG_INPUT
, true, 1);
}
resetMetaState(content);
return(true);
}
if (i == android.view.KeyCharacterMap.HEX_INPUT)
{
int start;
if (selStart == selEnd)
{
start = selEnd;
while (start > 0 && selEnd - start < 4 && Sharpen.CharHelper.Digit(content[start
- 1], 16) >= 0)
{
start--;
}
}
else
{
start = selStart;
}
int ch = -1;
try
{
string hex = android.text.TextUtils.substring(content, start, selEnd);
ch = System.Convert.ToInt32(hex, 16);
}
catch (System.ArgumentException)
{
}
if (ch >= 0)
{
selStart = start;
android.text.Selection.setSelection(content, selStart, selEnd);
i = ch;
}
else
{
i = 0;
}
}
if (i != 0)
{
bool dead = false;
if ((i & android.view.KeyCharacterMap.COMBINING_ACCENT) != 0)
{
dead = true;
i = i & android.view.KeyCharacterMap.COMBINING_ACCENT_MASK;
}
if (activeStart == selStart && activeEnd == selEnd)
{
bool replace = false;
if (selEnd - selStart - 1 == 0)
{
char accent = content[selStart];
int composed = android.view.KeyEvent.getDeadChar(accent, i);
if (composed != 0)
{
i = composed;
replace = true;
}
}
if (!replace)
{
android.text.Selection.setSelection(content, selEnd);
content.removeSpan(android.text.method.TextKeyListener.ACTIVE);
selStart = selEnd;
}
}
if ((pref & android.text.method.TextKeyListener.AUTO_CAP) != 0 && Sharpen.CharHelper.IsLower
(i) && android.text.method.TextKeyListener.shouldCap(mAutoCap, content, selStart
))
{
int where = content.getSpanEnd(android.text.method.TextKeyListener.CAPPED);
int flags = content.getSpanFlags(android.text.method.TextKeyListener.CAPPED);
if (where == selStart && (((flags >> 16) & unchecked ((int)(0xFFFF))) == i))
{
content.removeSpan(android.text.method.TextKeyListener.CAPPED);
}
else
{
flags = i << 16;
i = Sharpen.CharHelper.ToUpper(i);
if (selStart == 0)
{
content.setSpan(android.text.method.TextKeyListener.CAPPED, 0, 0, android.text.SpannedClass.SPAN_MARK_MARK
| flags);
}
else
{
content.setSpan(android.text.method.TextKeyListener.CAPPED, selStart - 1, selStart
, android.text.SpannedClass.SPAN_EXCLUSIVE_EXCLUSIVE | flags);
}
}
}
if (selStart != selEnd)
{
android.text.Selection.setSelection(content, selEnd);
}
content.setSpan(OLD_SEL_START, selStart, selStart, android.text.SpannedClass.SPAN_MARK_MARK
);
content.replace(selStart, selEnd, java.lang.CharSequenceProxy.Wrap(((char)i).ToString
()));
int oldStart = content.getSpanStart(OLD_SEL_START);
selEnd = android.text.Selection.getSelectionEnd(content);
if (oldStart < selEnd)
{
content.setSpan(android.text.method.TextKeyListener.LAST_TYPED, oldStart, selEnd,
android.text.SpannedClass.SPAN_EXCLUSIVE_EXCLUSIVE);
if (dead)
{
android.text.Selection.setSelection(content, oldStart, selEnd);
content.setSpan(android.text.method.TextKeyListener.ACTIVE, oldStart, selEnd, android.text.SpannedClass.SPAN_EXCLUSIVE_EXCLUSIVE
);
}
}
adjustMetaAfterKeypress(content);
// potentially do autotext replacement if the character
// that was typed was an autotext terminator
if ((pref & android.text.method.TextKeyListener.AUTO_TEXT) != 0 && mAutoText && (
i == ' ' || i == '\t' || i == '\n' || i == ',' || i == '.' || i == '!' || i == '?' ||
i == '"' || Sharpen.CharHelper.GetType(i) == Sharpen.CharHelper.END_PUNCTUATION
) && content.getSpanEnd(android.text.method.TextKeyListener.INHIBIT_REPLACEMENT)
!= oldStart)
{
int x;
for (x = oldStart; x > 0; x--)
{
char c = content[x - 1];
if (c != '\'' && !System.Char.IsLetter(c))
{
break;
}
}
string rep = getReplacement(content, x, oldStart, view);
if (rep != null)
{
android.text.method.QwertyKeyListener.Replaced[] repl = content.getSpans <android.text.method.QwertyKeyListener
.Replaced>(0, content.Length);
{
for (int a = 0; a < repl.Length; a++)
{
content.removeSpan(repl[a]);
}
}
char[] orig = new char[oldStart - x];
android.text.TextUtils.getChars(content, x, oldStart, orig, 0);
content.setSpan(new android.text.method.QwertyKeyListener.Replaced(orig), x, oldStart
, android.text.SpannedClass.SPAN_EXCLUSIVE_EXCLUSIVE);
content.replace(x, oldStart, java.lang.CharSequenceProxy.Wrap(rep));
}
}
// Replace two spaces by a period and a space.
if ((pref & android.text.method.TextKeyListener.AUTO_PERIOD) != 0 && mAutoText)
{
selEnd = android.text.Selection.getSelectionEnd(content);
if (selEnd - 3 >= 0)
{
if (content[selEnd - 1] == ' ' && content[selEnd - 2] == ' ')
{
char c = content[selEnd - 3];
{
for (int j = selEnd - 3; j > 0; j--)
{
if (c == '"' || Sharpen.CharHelper.GetType(c) == Sharpen.CharHelper.END_PUNCTUATION)
{
c = content[j - 1];
}
else
{
break;
}
}
}
if (System.Char.IsLetter(c) || System.Char.IsDigit(c))
{
content.replace(selEnd - 2, selEnd - 1, java.lang.CharSequenceProxy.Wrap("."));
}
}
}
}
return(true);
}
else
{
if (keyCode == android.view.KeyEvent.KEYCODE_DEL && (@event.hasNoModifiers() || @event
.hasModifiers(android.view.KeyEvent.META_ALT_ON)) && selStart == selEnd)
{
// special backspace case for undoing autotext
int consider = 1;
// if backspacing over the last typed character,
// it undoes the autotext prior to that character
// (unless the character typed was newline, in which
// case this behavior would be confusing)
if (content.getSpanEnd(android.text.method.TextKeyListener.LAST_TYPED) == selStart)
{
if (content[selStart - 1] != '\n')
{
consider = 2;
}
}
android.text.method.QwertyKeyListener.Replaced[] repl = content.getSpans <android.text.method.QwertyKeyListener
.Replaced>(selStart - consider, selStart);
if (repl.Length > 0)
{
int st = content.getSpanStart(repl[0]);
int en = content.getSpanEnd(repl[0]);
string old = new string(repl[0].mText);
content.removeSpan(repl[0]);
// only cancel the autocomplete if the cursor is at the end of
// the replaced span (or after it, because the user is
// backspacing over the space after the word, not the word
// itself).
if (selStart >= en)
{
content.setSpan(android.text.method.TextKeyListener.INHIBIT_REPLACEMENT, en, en,
android.text.SpannedClass.SPAN_POINT_POINT);
content.replace(st, en, java.lang.CharSequenceProxy.Wrap(old));
en = content.getSpanStart(android.text.method.TextKeyListener.INHIBIT_REPLACEMENT
);
if (en - 1 >= 0)
{
content.setSpan(android.text.method.TextKeyListener.INHIBIT_REPLACEMENT, en - 1,
en, android.text.SpannedClass.SPAN_EXCLUSIVE_EXCLUSIVE);
}
else
{
content.removeSpan(android.text.method.TextKeyListener.INHIBIT_REPLACEMENT);
}
adjustMetaAfterKeypress(content);
}
else
{
adjustMetaAfterKeypress(content);
return(base.onKeyDown(view, content, keyCode, @event));
}
return(true);
}
}
}
return(base.onKeyDown(view, content, keyCode, @event));
}