// private static int pin(int value, int min, int max) {
// return value < min ? 0 : (value > max ? max : value);
// }
/// <summary>
/// Set the selection anchor to <code>start</code> and the selection edge
/// to <code>stop</code>.
/// </summary>
/// <remarks>
/// Set the selection anchor to <code>start</code> and the selection edge
/// to <code>stop</code>.
/// </remarks>
public static void setSelection(android.text.Spannable text, int start, int stop)
{
// int len = text.length();
// start = pin(start, 0, len); XXX remove unless we really need it
// stop = pin(stop, 0, len);
int ostart = getSelectionStart(text);
int oend = getSelectionEnd(text);
if (ostart != start || oend != stop)
{
text.setSpan(SELECTION_START, start, start, android.text.SpannedClass.SPAN_POINT_POINT
| android.text.SpannedClass.SPAN_INTERMEDIATE);
text.setSpan(SELECTION_END, stop, stop, android.text.SpannedClass.SPAN_POINT_POINT
);
}
}
private static void addParagraphSpan(android.text.Spannable buffer, object what,
int start, int end)
{
int len = buffer.Length;
if (start != 0 && start != len && buffer[start - 1] != '\n')
{
for (start--; start > 0; start--)
{
if (buffer[start - 1] == '\n')
{
break;
}
}
}
if (end != 0 && end != len && buffer[end - 1] != '\n')
{
for (end++; end < len; end++)
{
if (buffer[end - 1] == '\n')
{
break;
}
}
}
buffer.setSpan(what, start, end, android.text.SpannedClass.SPAN_PARAGRAPH);
}
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);
}
/// <summary>
/// Marks the specified region of <code>content</code> as having
/// contained <code>original</code> prior to AutoText replacement.
/// </summary>
/// <remarks>
/// Marks the specified region of <code>content</code> as having
/// contained <code>original</code> prior to AutoText replacement.
/// Call this method when you have done or are about to do an
/// AutoText-style replacement on a region of text and want to let
/// the same mechanism (the user pressing DEL immediately after the
/// change) undo the replacement.
/// </remarks>
/// <param name="content">the Editable text where the replacement was made</param>
/// <param name="start">the start of the replaced region</param>
/// <param name="end">the end of the replaced region; the location of the cursor</param>
/// <param name="original">the text to be restored if the user presses DEL</param>
public static void markAsReplaced(android.text.Spannable content, int start, int
end, string original)
{
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]);
}
}
int len = original.Length;
char[] orig = new char[len];
Sharpen.StringHelper.GetCharsForString(original, 0, len, orig, 0);
content.setSpan(new android.text.method.QwertyKeyListener.Replaced(orig), start,
end, android.text.SpannedClass.SPAN_EXCLUSIVE_EXCLUSIVE);
}
/// <summary>Move the selection edge to offset <code>index</code>.</summary>
/// <remarks>Move the selection edge to offset <code>index</code>.</remarks>
public static void extendSelection(android.text.Spannable text, int index)
{
if (text.getSpanStart(SELECTION_END) != index)
{
text.setSpan(SELECTION_END, index, index, android.text.SpannedClass.SPAN_POINT_POINT
);
}
}
// no super to call through to
private void release(android.text.Editable content, object what, android.view.KeyEvent
@event)
{
int current = content.getSpanFlags(what);
switch (@event.getKeyCharacterMap().getModifierBehavior())
{
case android.view.KeyCharacterMap.MODIFIER_BEHAVIOR_CHORDED_OR_TOGGLED:
{
if (current == USED)
{
content.removeSpan(what);
}
else
{
if (current == PRESSED)
{
content.setSpan(what, 0, 0, RELEASED);
}
}
break;
}
default:
{
content.removeSpan(what);
break;
}
}
}
/// <summary>Start selecting text.</summary>
/// <remarks>Start selecting text.</remarks>
/// <hide>pending API review</hide>
public static void startSelecting(android.view.View view, android.text.Spannable
content)
{
content.setSpan(SELECTING, 0, 0, PRESSED);
}
// no super to call through to
private void press(android.text.Editable content, object what)
{
int state = content.getSpanFlags(what);
if (state == PRESSED)
{
}
else
{
// repeat before use
if (state == RELEASED)
{
content.setSpan(what, 0, 0, LOCKED);
}
else
{
if (state == USED)
{
}
else
{
// repeat after use
if (state == LOCKED)
{
content.removeSpan(what);
}
else
{
content.setSpan(what, 0, 0, PRESSED);
}
}
}
}
}
private static void adjust(android.text.Spannable content, object what)
{
int current = content.getSpanFlags(what);
if (current == PRESSED)
{
content.setSpan(what, 0, 0, USED);
}
else
{
if (current == RELEASED)
{
content.removeSpan(what);
}
}
}
public override bool onTouchEvent(android.widget.TextView widget, android.text.Spannable
buffer, android.view.MotionEvent @event)
{
int initialScrollX = -1;
int initialScrollY = -1;
int action = @event.getAction();
if (action == android.view.MotionEvent.ACTION_UP)
{
initialScrollX = android.text.method.Touch.getInitialScrollX(widget, buffer);
initialScrollY = android.text.method.Touch.getInitialScrollY(widget, buffer);
}
bool handled = android.text.method.Touch.onTouchEvent(widget, buffer, @event);
if (widget.isFocused() && !widget.didTouchFocusSelect())
{
if (action == android.view.MotionEvent.ACTION_DOWN)
{
if (isSelecting(buffer))
{
int offset = widget.getOffsetForPosition(@event.getX(), @event.getY());
buffer.setSpan(LAST_TAP_DOWN, offset, offset, android.text.SpannedClass.SPAN_POINT_POINT
);
// Disallow intercepting of the touch events, so that
// users can scroll and select at the same time.
// without this, users would get booted out of select
// mode once the view detected it needed to scroll.
widget.getParent().requestDisallowInterceptTouchEvent(true);
}
}
else
{
if (action == android.view.MotionEvent.ACTION_MOVE)
{
if (isSelecting(buffer) && handled)
{
// Before selecting, make sure we've moved out of the "slop".
// handled will be true, if we're in select mode AND we're
// OUT of the slop
// Turn long press off while we're selecting. User needs to
// re-tap on the selection to enable long press
widget.cancelLongPress();
// Update selection as we're moving the selection area.
// Get the current touch position
int offset = widget.getOffsetForPosition(@event.getX(), @event.getY());
android.text.Selection.extendSelection(buffer, offset);
return true;
}
}
else
{
if (action == android.view.MotionEvent.ACTION_UP)
{
// If we have scrolled, then the up shouldn't move the cursor,
// but we do need to make sure the cursor is still visible at
// the current scroll offset to avoid the scroll jumping later
// to show it.
if ((initialScrollY >= 0 && initialScrollY != widget.getScrollY()) || (initialScrollX
>= 0 && initialScrollX != widget.getScrollX()))
{
widget.moveCursorToVisibleOffset();
return true;
}
int offset = widget.getOffsetForPosition(@event.getX(), @event.getY());
if (isSelecting(buffer))
{
buffer.removeSpan(LAST_TAP_DOWN);
android.text.Selection.extendSelection(buffer, offset);
}
else
{
if (!widget.shouldIgnoreActionUpEvent())
{
android.text.Selection.setSelection(buffer, offset);
}
}
android.text.method.MetaKeyKeyListener.adjustMetaAfterKeypress(buffer);
android.text.method.MetaKeyKeyListener.resetLockedMeta(buffer);
return true;
}
}
}
}
return handled;
}