/*
* テキストの内容の変化を通知してきた。
*/
private void EditContext_TextUpdating(CoreTextEditContext sender, CoreTextTextUpdatingEventArgs ev)
{
Debug.WriteLine("<<--- TextUpdating:({0},{1})->({2},{3}) [{4}] {5}",
ev.Range.StartCaretPosition, ev.Range.EndCaretPosition,
ev.NewSelection.StartCaretPosition, ev.NewSelection.EndCaretPosition,
ev.Text,
ev.Result
);
// カーソルがあると文字の操作に邪魔なので、いったん取り除きます。
RemoveCursor();
// 以前の選択位置の文字を末尾から取り除いていきます。
for (int i = ev.Range.EndCaretPosition - 1; ev.Range.StartCaretPosition <= i; i--)
{
EditText.Inlines.RemoveAt(i);
}
// 新しいテキストを挿入します。
for (int i = 0; i < ev.Text.Length; i++)
{
// １文字ごとにRunを作ります。
Run txt = new Run();
txt.Text = ev.Text.Substring(i, 1);
// RunをTextBlockに挿入します。
EditText.Inlines.Insert(ev.Range.StartCaretPosition + i, txt);
}
// アプリ内で持っているテキストの選択位置を更新します。
Selection = ev.NewSelection;
// カーソルを挿入します。
InsertCursor();
}
void EditContext_TextUpdating(CoreTextEditContext sender, CoreTextTextUpdatingEventArgs args)
{
if (!_compositionStarted) // Only update text when composition is started.
{
args.Result = CoreTextTextUpdatingResult.Failed;
return;
}
CoreTextRange range = args.Range;
string newText = args.Text;
CoreTextRange newSelection = args.NewSelection;
// Modify the internal text store.
_inputBuffer = _inputBuffer.Substring(0, range.StartCaretPosition) +
newText +
_inputBuffer.Substring(Math.Min(_inputBuffer.Length, range.EndCaretPosition));
// You can set the proper font or direction for the updated text based on the language by checking
// args.InputLanguage. We will not do that in this sample.
// Modify the current selection.
newSelection.EndCaretPosition = newSelection.StartCaretPosition;
// Update the selection of the edit context. There is no need to notify the system
// because the system itself changed the selection.
SetSelection(newSelection);
//var compStr = _inputBuffer;
//compStr = compStr.Insert(_selection.StartCaretPosition, "|");
//Debug.WriteLine("composition text: {0}, cursor pos: {1}", (object)compStr, _selection.StartCaretPosition);
OnTextComposition(_inputBuffer, _selection.StartCaretPosition);
}
void SetSelection(CoreTextRange selection)
{
// Modify the internal selection.
_selection = selection;
//Update the UI to show the new selection.
UpdateTextUI();
}
void EditContext_SelectionUpdating(CoreTextEditContext sender, CoreTextSelectionUpdatingEventArgs args)
{
// Set the new selection to the value specified by the system.
CoreTextRange range = args.Selection;
// Update the selection of the edit context. There is no need to notify the system
// because the system itself changed the selection.
SetSelection(range);
}
// Adjust the active endpoint of the selection in the specified direction.
void AdjustSelectionEndpoint(int direction)
{
CoreTextRange range = _selection;
if (_extendingLeft)
{
range.StartCaretPosition = Math.Max(0, range.StartCaretPosition + direction);
}
else
{
range.EndCaretPosition = Math.Min(_text.Length, range.EndCaretPosition + direction);
}
SetSelectionAndNotify(range);
}
void EditContext_SelectionUpdating(CoreTextEditContext sender, CoreTextSelectionUpdatingEventArgs args)
{
// Set the new selection to the value specified by the system.
CoreTextRange range = args.Selection;
// Update the selection of the edit context. There is no need to notify the system
// because the system itself changed the selection.
SetSelection(range);
//var compStr = _inputBuffer;
//compStr = compStr.Insert(_selection.StartCaretPosition, "|");
//Debug.WriteLine("composition text: {0}, cursor pos: {1}", (object)compStr, _selection.StartCaretPosition);
OnTextComposition(_inputBuffer, _selection.StartCaretPosition);
}
/*
* テキストの選択位置の変化を通知してきた。
*/
private void EditContext_SelectionUpdating(CoreTextEditContext sender, CoreTextSelectionUpdatingEventArgs ev)
{
Debug.WriteLine("<<--- SelectionUpdating: cancel:{0} result:{1} ({2},{3})",
ev.IsCanceled,
ev.Result,
ev.Selection.StartCaretPosition, ev.Selection.EndCaretPosition
);
// カーソルがあると文字の操作に邪魔なので、いったん取り除きます。
RemoveCursor();
// アプリ内で持っているテキストの選択位置を更新します。
Selection = ev.Selection;
// カーソルを挿入します。
InsertCursor();
}
// Replace the text in the specified range.
void ReplaceText(CoreTextRange modifiedRange, string text)
{
// Modify the internal text store.
_text = _text.Substring(0, modifiedRange.StartCaretPosition) +
text +
_text.Substring(modifiedRange.EndCaretPosition);
// Move the caret to the end of the replacement text.
_selection.StartCaretPosition = modifiedRange.StartCaretPosition + text.Length;
_selection.EndCaretPosition = _selection.StartCaretPosition;
// Update the selection of the edit context. There is no need to notify the system
// of the selection change because we are going to call NotifyTextChanged soon.
SetSelection(_selection);
// Let the CoreTextEditContext know what changed.
_editContext.NotifyTextChanged(modifiedRange, text.Length, _selection);
}
void EditContext_TextUpdating(CoreTextEditContext sender, CoreTextTextUpdatingEventArgs args)
{
CoreTextRange range = args.Range;
string newText = args.Text;
CoreTextRange newSelection = args.NewSelection;
// Modify the internal text store.
_text = _text.Substring(0, range.StartCaretPosition) +
newText +
_text.Substring(Math.Min(_text.Length, range.EndCaretPosition));
// You can set the proper font or direction for the updated text based on the language by checking
// args.InputLanguage. We will not do that in this sample.
// Modify the current selection.
newSelection.EndCaretPosition = newSelection.StartCaretPosition;
// Update the selection of the edit context. There is no need to notify the system
// because the system itself changed the selection.
SetSelection(newSelection);
}
async void EditContext_TextUpdating(CoreTextEditContext sender, CoreTextTextUpdatingEventArgs args)
{
CoreTextRange range = args.Range;
string newText = args.Text;
CoreTextRange newSelection = args.NewSelection;
var line = _content[CurrentLine].Text;
//// Modify the internal text store.
_content[CurrentLine].Text = line.Substring(0, range.StartCaretPosition) +
newText +
line.Substring(Math.Min(line.Length, range.EndCaretPosition));
if (_content[CurrentLine].Text.Trim().ToLower().StartsWith("todo:") && _content[CurrentLine] is not TodoTextItem)
{
var todoItem = new TodoTextItem()
{
Text = _content[CurrentLine].Text.Trim().Substring(5)
};
// convert item to todo
_content.RemoveAt(CurrentLine);
_content.Insert(CurrentLine, todoItem);
newSelection.StartCaretPosition = newSelection.EndCaretPosition = 0;
// had to add this to make sure it works
await Task.Delay(2);
SetSelectionAndNotify(newSelection);
}
else
{
//// Modify the current selection.
newSelection.EndCaretPosition = newSelection.StartCaretPosition;
//// Update the selection of the edit context. There is no need to notify the system
//// because the system itself changed the selection.
SetSelection(newSelection);
}
}
// Change the selection without notifying CoreTextEditContext of the new selection.
void SetSelection(CoreTextRange selection)
{
// Modify the internal selection.
_selection = selection;
}
void CoreWindow_KeyDown(CoreWindow sender, KeyEventArgs args)
{
// Do not process keyboard input if the custom edit control does not
// have focus.
if (!_internalFocus)
{
return;
}
// This holds the range we intend to operate on, or which we intend
// to become the new selection. Start with the current selection.
CoreTextRange range = _selection;
// For the purpose of this sample, we will support only the left and right
// arrow keys and the backspace key. A more complete text edit control
// would also handle keys like Home, End, and Delete, as well as
// hotkeys like Ctrl+V to paste.
//
// Note that this sample does not properly handle surrogate pairs
// nor does it handle grapheme clusters.
switch (args.VirtualKey)
{
// Backspace
case VirtualKey.Back:
if (range.StartCaretPosition == 0 && _content[CurrentLine] is TodoTextItem todoItem)
{
// convert todo item to a regular item
_content[CurrentLine] = new TextItem()
{
Text = "todo" + todoItem.Text
};
range.StartCaretPosition = range.EndCaretPosition = 4;
SetSelectionAndNotify(range);
}
else if (range.StartCaretPosition == 0 && CurrentLine > 0)
{
CurrentLine--;
range.StartCaretPosition = _content[CurrentLine].Text.Length;
range.EndCaretPosition = range.StartCaretPosition;
_content[CurrentLine].Text += _content[CurrentLine + 1].Text;
_content.RemoveAt(CurrentLine + 1);
SetSelectionAndNotify(range);
}
else
{
range.StartCaretPosition = Math.Max(0, range.StartCaretPosition - 1);
ReplaceText(range, "");
}
break;
// Left arrow
case VirtualKey.Left:
// There was no selection. Move the caret left one code unit if possible.
if (range.StartCaretPosition == 0 && CurrentLine > 0)
{
// move to previous line
CurrentLine--;
range.StartCaretPosition = _content[CurrentLine].Text.Length;
range.EndCaretPosition = range.StartCaretPosition;
}
else
{
range.StartCaretPosition = Math.Max(0, range.StartCaretPosition - 1);
range.EndCaretPosition = range.StartCaretPosition;
}
SetSelectionAndNotify(range);
break;
// Right arrow
case VirtualKey.Right:
// There was no selection. Move the caret right one code unit if possible.
if (range.StartCaretPosition == _content[CurrentLine].Text.Length && CurrentLine < _content.Count - 1)
{
// move to next line
CurrentLine++;
range.StartCaretPosition = 0;
range.EndCaretPosition = range.StartCaretPosition;
}
else
{
range.StartCaretPosition = Math.Min(_content[CurrentLine].Text.Length, range.StartCaretPosition + 1);
range.EndCaretPosition = range.StartCaretPosition;
}
SetSelectionAndNotify(range);
break;
case VirtualKey.Down:
if (CurrentLine < _content.Count - 1)
{
//if (_content[CurrentLine] is TodoTextItem item)
//{
// item.Update();
//}
CurrentLine++;
range.StartCaretPosition = Math.Min(_content[CurrentLine].Text.Length, range.StartCaretPosition);
range.EndCaretPosition = range.StartCaretPosition;
SetSelectionAndNotify(range);
}
break;
case VirtualKey.Up:
if (CurrentLine > 0)
{
//if (_content[CurrentLine] is TodoTextItem item)
//{
// item.Update();
//}
CurrentLine--;
range.StartCaretPosition = Math.Min(_content[CurrentLine].Text.Length, range.StartCaretPosition);
range.EndCaretPosition = range.StartCaretPosition;
SetSelectionAndNotify(range);
}
break;
case VirtualKey.Enter:
var line = _content[CurrentLine].Text;
var left = line.Substring(0, _selection.StartCaretPosition);
var right = line.Substring(_selection.EndCaretPosition);
_content[CurrentLine].Text = left;
_content.Insert(CurrentLine + 1, new TextItem()
{
Text = right
});
if (_content[CurrentLine] is TodoTextItem item)
{
item.Update();
}
CurrentLine++;
range.StartCaretPosition = 0;
range.EndCaretPosition = range.StartCaretPosition;
SetSelectionAndNotify(range);
break;
}
}
// Change the selection and notify CoreTextEditContext of the new selection.
void SetSelectionAndNotify(CoreTextRange selection)
{
SetSelection(selection);
_editContext.NotifySelectionChanged(_selection);
}
public static bool IsEmpty(this CoreTextRange range)
{
return(range.StartCaretPosition == range.EndCaretPosition);
}
public static int Size(this CoreTextRange range)
{
return(range.EndCaretPosition - range.StartCaretPosition);
}
// Replace the text in the specified range.
void ReplaceText(CoreTextRange modifiedRange, string text)
{
// Modify the internal text store.
_text = _text.Substring(0, modifiedRange.StartCaretPosition) +
text +
_text.Substring(modifiedRange.EndCaretPosition);
// Move the caret to the end of the replacement text.
_selection.StartCaretPosition = modifiedRange.StartCaretPosition + text.Length;
_selection.EndCaretPosition = _selection.StartCaretPosition;
// Update the selection of the edit context. There is no need to notify the system
// of the selection change because we are going to call NotifyTextChanged soon.
SetSelection(_selection);
// Let the CoreTextEditContext know what changed.
_editContext.NotifyTextChanged(modifiedRange, text.Length, _selection);
}
// Change the selection without notifying CoreTextEditContext of the new selection.
void SetSelection(CoreTextRange selection)
{
// Modify the internal selection.
_selection = selection;
//Update the UI to show the new selection.
UpdateTextUI();
}
void CoreWindow_KeyDown(CoreWindow sender, KeyEventArgs args)
{
// Do not process keyboard input if the custom edit control does not
// have focus.
if (!_internalFocus)
{
return;
}
// This holds the range we intend to operate on, or which we intend
// to become the new selection. Start with the current selection.
CoreTextRange range = _selection;
// For the purpose of this sample, we will support only the left and right
// arrow keys and the backspace key. A more complete text edit control
// would also handle keys like Home, End, and Delete, as well as
// hotkeys like Ctrl+V to paste.
//
// Note that this sample does not properly handle surrogate pairs
// nor does it handle grapheme clusters.
switch (args.VirtualKey)
{
// Backspace
case VirtualKey.Back:
// If there is a selection, then delete the selection.
if (HasSelection())
{
// Set the text in the selection to nothing.
ReplaceText(range, "");
}
else
{
// Delete the character to the left of the caret, if one exists,
// by creating a range that encloses the character to the left
// of the caret, and setting the contents of that range to nothing.
range.StartCaretPosition = Math.Max(0, range.StartCaretPosition - 1);
ReplaceText(range, "");
}
break;
// Left arrow
case VirtualKey.Left:
// If the shift key is down, then adjust the size of the selection.
if (_coreWindow.GetKeyState(VirtualKey.Shift).HasFlag(CoreVirtualKeyStates.Down))
{
// If this is the start of a selection, then remember which edge we are adjusting.
if (!HasSelection())
{
_extendingLeft = true;
}
// Adjust the selection and notify CoreTextEditContext.
AdjustSelectionEndpoint(-1);
}
else
{
// The shift key is not down. If there was a selection, then snap the
// caret at the left edge of the selection.
if (HasSelection())
{
range.EndCaretPosition = range.StartCaretPosition;
SetSelectionAndNotify(range);
}
else
{
// There was no selection. Move the caret left one code unit if possible.
range.StartCaretPosition = Math.Max(0, range.StartCaretPosition - 1);
range.EndCaretPosition = range.StartCaretPosition;
SetSelectionAndNotify(range);
}
}
break;
// Right arrow
case VirtualKey.Right:
// If the shift key is down, then adjust the size of the selection.
if (_coreWindow.GetKeyState(VirtualKey.Shift).HasFlag(CoreVirtualKeyStates.Down))
{
// If this is the start of a selection, then remember which edge we are adjusting.
if (!HasSelection())
{
_extendingLeft = false;
}
// Adjust the selection and notify CoreTextEditContext.
AdjustSelectionEndpoint(+1);
}
else
{
// The shift key is not down. If there was a selection, then snap the
// caret at the right edge of the selection.
if (HasSelection())
{
range.StartCaretPosition = range.EndCaretPosition;
SetSelectionAndNotify(range);
}
else
{
// There was no selection. Move the caret right one code unit if possible.
range.StartCaretPosition = Math.Min(_text.Length, range.StartCaretPosition + 1);
range.EndCaretPosition = range.StartCaretPosition;
SetSelectionAndNotify(range);
}
}
break;
}
}
// Change the selection and notify CoreTextEditContext of the new selection.
void SetSelectionAndNotify(CoreTextRange selection)
{
SetSelection(selection);
_editContext.NotifySelectionChanged(_selection);
}
public TextChangedEventArgs(CoreTextRange modifiedRange, int newLength, CoreTextRange newSelection)
{
ModifiedRange = modifiedRange;
NewLength = newLength;
NewSelection = newSelection;
}
public SelectionChangedEventArgs(CoreTextRange selection)
{
Selection = selection;
}
