view.groupChanges(function() {
var tabstop = settings.get('tabstop');
var selection = view.getSelectedRange();
var str = '';
if (m_range.isZeroLength(selection)){
var line = env.model.lines[selection.start.row];
var trailspaces = line.substring(selection.start.col).
match(/^\s*/)[0].length;
var count = tabstop - (selection.start.col + trailspaces) % tabstop;
for (var i = 0; i < count; i++) {
str += ' ';
}
view.replaceCharacters({
start: selection.start,
end: selection.start
}, str);
view.moveCursorTo({
col: selection.start.col + count + trailspaces,
row: selection.end.row
});
} else {
for (var i = 0; i < tabstop; i++) {
str += ' ';
}
var startCol;
var row = selection.start.row - 1;
while (row++ < selection.end.row) {
startCol = row == selection.start.row ? selection.start.col : 0;
view.replaceCharacters({
start: { row: row, col: startCol},
end: { row: row, col: startCol}
}, str);
}
view.setSelection({
start: selection.start,
end: {
col: selection.end.col + tabstop,
row: selection.end.row
}
});
}
}.bind(this));
view.groupChanges(function() {
var tabstop = settings.get('tabstop');
var selection = view.getSelectedRange();
var lines = env.model.lines;
var count = 0;
if (m_range.isZeroLength(selection)){
count = Math.min(
lines[selection.start.row].substring(0, selection.start.col).
match(/\s*$/)[0].length,
(selection.start.col - tabstop) % tabstop || tabstop);
view.replaceCharacters({
start: {
col: selection.start.col - count,
row: selection.start.row
},
end: selection.start
}, '');
view.moveCursorTo({
row: selection.start.row,
col: selection.end.col - count
});
} else {
var startCol;
var row = selection.start.row - 1;
while (row++ < selection.end.row) {
startCol = row == selection.start.row ? selection.start.col : 0;
count = Math.min(
lines[row].substring(startCol).match(/^\s*/)[0].length,
tabstop);
view.replaceCharacters({
start: { row: row, col: startCol},
end: { row: row, col: startCol + count}
}, '');
}
view.setSelection({
start: { row: selection.start.row, col: selection.start.col},
end: { row: selection.end.row, col: selection.end.col - count}
});
}
}.bind(this));
performBackspaceOrDelete: function(isBackspace) {
if (this._isReadOnly()) {
return false;
}
var model = this.editor.layoutManager.textStorage;
var lines = model.lines;
var line = '', count = 0;
var tabstop = settings.get('tabstop');
var range = this.getSelectedRange();
if (Range.isZeroLength(range)) {
if (isBackspace) {
var start = range.start;
line = lines[start.row];
var preWhitespaces = line.substring(0, start.col).
match(/\s*$/)[0].length;
// If there are less then n-tabstop whitespaces in front, OR
// the current cursor position is not n times tabstop, THEN
// delete only 1 character.
if (preWhitespaces < tabstop
|| (start.col - tabstop) % tabstop != 0) {
count = 1;
} else {
// Otherwise delete tabstop whitespaces.
count = tabstop;
}
range = {
start: model.displacePosition(start, count * -1),
end: range.end
};
} else {
var end = range.end;
line = lines[end.row];
var trailingWhitespaces = line.substring(end.col).
match(/^\s*/)[0].length;
// If there are less then n-tabstop whitespaces after the cursor
// position, then delete only 1 character. Otherwise delete
// tabstop whitespaces.
if (trailingWhitespaces < tabstop) {
count = 1;
} else {
count = tabstop;
}
range = {
start: range.start,
end: model.displacePosition(range.end, count)
};
}
}
this.groupChanges(function() {
this.replaceCharacters(range, '');
// Position the insertion point at the start of all the ranges that
// were just deleted.
this.moveCursorTo(range.start);
}.bind(this));
return true;
},
_rangeIsInsertionPoint: function(range) {
return Range.isZeroLength(range);
},