@Override
public void enterMode(final ModeSwitchHint... hints) throws CommandExecutionException {
boolean fixSelection = false;
boolean keepSelection = false;
boolean recallSelection = false;
ExecuteCommandHint onEnterCommand = null;
for (final ModeSwitchHint hint : hints) {
if (hint == FIX_SELECTION_HINT) {
keepSelection = true;
fixSelection = true;
}
if (hint == KEEP_SELECTION_HINT) {
keepSelection = true;
}
if (hint == RECALL_SELECTION_HINT) {
recallSelection = true;
}
if (hint instanceof ExecuteCommandHint) {
onEnterCommand = (ExecuteCommandHint) hint;
}
}
if (recallSelection) {
Selection previousSel = editorAdaptor.getLastActiveSelection();
CursorService cursorService = editorAdaptor.getCursorService();
Position from = cursorService.getMark(CursorService.INTERNAL_LAST_SELECT_FROM_MARK);
Position to = cursorService.getMark(CursorService.INTERNAL_LAST_SELECT_TO_MARK);
if (previousSel == null) {
VrapperLog.info("Previous selection was null, selection not recalled.");
} else {
Selection updatedSel = updateSelection(editorAdaptor, previousSel, from, to);
// Makes sure to set the sticky column.
editorAdaptor.setPosition(updatedSel.getTo(), StickyColumnPolicy.ON_CHANGE);
editorAdaptor.setSelection(updatedSel);
}
} else if (!keepSelection) {
editorAdaptor.setSelection(null);
}
Selection currentSelection = editorAdaptor.getSelection();
if (fixSelection && currentSelection != null) {
editorAdaptor.setSelection(fixSelection(currentSelection));
}
super.enterMode(hints);
if (onEnterCommand != null) {
try {
super.executeCommand(onEnterCommand.getCommand());
} catch (final CommandExecutionException e) {
editorAdaptor.getUserInterfaceService().setErrorMessage(e.getMessage());
}
}
fixCaret();
}
/**
* Vim doesn't start a delimited range on a newline or end a range on an empty line (try 'vi{'
* while within a function for proof).
*/
public static Position fixLeftDelimiter(TextContent model, CursorService cursor, Position delim) {
// check if the character after delimiter is a newline
if (isNewLine(model.getText(delim.getModelOffset() + 1, 1))) {
// start after newline
LineInformation line = model.getLineInformationOfOffset(delim.getModelOffset());
LineInformation nextLine = model.getLineInformation(line.getNumber() + 1);
delim = cursor.newPositionForModelOffset(nextLine.getBeginOffset());
} else {
delim = delim.addModelOffset(1);
}
return delim;
}
public static Position fixRightDelimiter(
TextContent model, CursorService cursor, Position delim) {
int delimIndex = delim.getModelOffset();
LineInformation line = model.getLineInformationOfOffset(delimIndex);
int lineStart = line.getBeginOffset();
if (delimIndex > lineStart) {
// is everything before the delimiter just whitespace?
String text = model.getText(lineStart, delimIndex - lineStart);
if (VimUtils.isBlank(text)) {
// end on previous line
LineInformation previousLine = model.getLineInformation(line.getNumber() - 1);
delimIndex = previousLine.getEndOffset();
delim = cursor.newPositionForModelOffset(delimIndex);
}
}
return delim;
}
/**
* Adds a (possibly negative) offset to a Position, then checks that the position didn't run into
* newline sequence or is past the last character. Windows endlines (CR LF) are notorious as they
* will make Eclipse puke.
*
* <p>This function will also account for the end of the text and the start of the text.
*
* @param adaptor {@link EditorAdaptor}
* @param original {@link Position} starting position
* @param delta {@link delta} how many characters to move. A CR LF newline will always count for
* two, whereas a CR newline only counts for one. The only special case is when the given
* delta makes us move into a CR LF sequence, in that case this function will move +/- 1
* character.
* @param allowPastLastChar whether the newly returned position can be past the last character.
* All motions want to pass <tt>true</tt> so that a selection includes the last character,
* while low-level positioning logic can pass <tt>false</tt> to keep the cursor on the last
* character. If the line is empty, the first position of the line is returned.
*/
public static Position safeAddModelOffset(
EditorAdaptor adaptor, Position original, int delta, boolean allowPastLastChar) {
CursorService cursorService = adaptor.getCursorService();
int originalPos = original.getModelOffset();
return cursorService.shiftPositionForModelOffset(originalPos, delta, allowPastLastChar);
}