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shift+tab to remove space before cursor or selection

This commit is contained in:
Vadim Lopatin 2014-04-24 12:31:23 +04:00
parent 2473a3f604
commit 9fb9a451d4
1 changed files with 47 additions and 0 deletions
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47
src/dlangui/widgets/editors.d
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@ -1025,12 +1025,33 @@ class EditWidgetBase : WidgetGroup, EditableContentListener {
{
if (_selectionRange.empty) {
// remove spaces before caret
TextRange r = spaceBefore(_caretPos);
if (!r.empty) {
EditOperation op = new EditOperation(EditAction.Replace, r, [""d]);
_content.performOperation(op);
}
} else {
if (wholeLinesSelected()) {
// unindent range
indentRange(true);
} else {
// remove space before selection
TextRange r = spaceBefore(_selectionRange.start);
if (!r.empty) {
int nchars = r.end.pos - r.start.pos;
TextRange saveRange = _selectionRange;
TextPosition saveCursor = _caretPos;
EditOperation op = new EditOperation(EditAction.Replace, r, [""d]);
_content.performOperation(op);
if (saveCursor.line == saveRange.start.line)
saveCursor.pos -= nchars;
if (saveRange.end.line == saveRange.start.line)
saveRange.end.pos -= nchars;
saveRange.start.pos -= nchars;
_selectionRange = saveRange;
_caretPos = saveCursor;
ensureCaretVisible();
}
}
}
}
@ -1041,6 +1062,32 @@ class EditWidgetBase : WidgetGroup, EditableContentListener {
return super.handleAction(a);
}
protected TextRange spaceBefore(TextPosition pos) {
TextRange res = TextRange(pos, pos);
dstring s = _content[pos.line];
int x = 0;
int start = -1;
for (int i = 0; i < pos.pos; i++) {
dchar ch = s[i];
if (ch == ' ') {
if (start == -1 || (x % tabSize) == 0)
start = i;
x++;
} else if (ch == '\t') {
if (start == -1 || (x % tabSize) == 0)
start = i;
x = (x + tabSize + 1) / tabSize * tabSize;
} else {
x++;
start = -1;
}
}
if (start != -1) {
res.start.pos = start;
}
return res;
}
/// change line indent
protected dstring indentLine(dstring src, bool back) {
int firstNonSpace = -1;