public JoinNextParagraphCommand(
ITextEditingCommandController <TContext> controller,
LinePosition line)
: base(true, false)
{
// Joining a paragraph consists of inserting the text of the current
// paragraph into the previous one with a space and then moving the
// cursor to the end of the original first paragraph (and space).
// Insert the text from the line into the prvious line.
var joinedLine = new LinePosition(line);
IInsertTextFromTextRangeCommand <TContext> insertCommand =
controller.CreateInsertTextFromTextRangeCommand(
new TextPosition(joinedLine, CharacterPosition.End),
new SingleLineTextRange(
(int)line + 1, CharacterPosition.Begin, CharacterPosition.End));
// Finally, delete the current line since we merged it.
IDeleteLineCommand <TContext> deleteCommand =
controller.CreateDeleteLineCommand((int)line + 1);
// Add the commands into the composite and indicate that the whitespace
// command controls where the text position will end up.
Commands.Add(insertCommand);
Commands.Add(deleteCommand);
}
public JoinPreviousParagraphCommand(
ITextEditingCommandController <TContext> controller,
LinePosition line)
: base(true, false)
{
// Establish our code contracts.
if (line.Index <= 0)
{
throw new InvalidOperationException(
"Cannot join the paragraph on the first line.");
}
// Joining a paragraph consists of inserting the text of the current
// paragraph into the previous one with a space and then moving the
// cursor to the end of the original first paragraph (and space).
// Insert the text from the line into the prvious line.
var joinedLine = new LinePosition((int)line - 1);
IInsertTextFromTextRangeCommand <TContext> insertCommand =
controller.CreateInsertTextFromTextRangeCommand(
new TextPosition(joinedLine, CharacterPosition.End),
new SingleLineTextRange(
line, CharacterPosition.Begin, CharacterPosition.End));
insertCommand.UpdateTextPosition = DoTypes.All;
// Finally, delete the current line since we merged it.
IDeleteLineCommand <TContext> deleteCommand =
controller.CreateDeleteLineCommand(line);
deleteCommand.UpdateTextPosition = DoTypes.None;
// Add the commands into the composite and indicate that the whitespace
// command controls where the text position will end up.
Commands.Add(insertCommand);
Commands.Add(deleteCommand);
}