From cbc68a3e044345b086adfe25172cda195299a055 Mon Sep 17 00:00:00 2001 From: miwanczuk Date: Wed, 8 May 2019 23:56:00 +0200 Subject: Change rules of indenting for spaces Now indentations and deindentations of spaces attemt to align text to closest full indent level. It works with tab/tab+shift (both with selection and no selection) as well as backspace. Also fixes bug where selection and cursor position were mispaced after (un)indenting selected text. --- scene/gui/text_edit.cpp | 125 +++++++++++++++++++++++++++++++----------------- 1 file changed, 81 insertions(+), 44 deletions(-) (limited to 'scene/gui/text_edit.cpp') diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp index 10bd9e2a8b..9655aab1b6 100644 --- a/scene/gui/text_edit.cpp +++ b/scene/gui/text_edit.cpp @@ -104,6 +104,13 @@ static CharType _get_right_pair_symbol(CharType c) { return 0; } +static int _find_first_non_whitespace_column_of_line(const String &line) { + int left = 0; + while (left < line.length() && _is_whitespace(line[left])) + left++; + return left; +} + void TextEdit::Text::set_font(const Ref &p_font) { font = p_font; @@ -1632,31 +1639,25 @@ void TextEdit::backspace_at_cursor() { _consume_backspace_for_pair_symbol(prev_line, prev_column); } else { // handle space indentation - if (cursor.column - indent_size >= 0 && indent_using_spaces) { - - // if there is enough spaces to count as a tab + if (cursor.column != 0 && indent_using_spaces) { + // check if there are no other chars before cursor, just indentation bool unindent = true; - for (int i = 1; i <= indent_size; i++) { - if (text[cursor.line][cursor.column - i] != ' ') { - unindent = false; - break; - } - } - - // and it is before the first character int i = 0; while (i < cursor.column && i < text[cursor.line].length()) { - if (text[cursor.line][i] != ' ' && text[cursor.line][i] != '\t') { + if (!_is_whitespace(text[cursor.line][i])) { unindent = false; break; } i++; } - // then we can remove it as a single character. + // then we can remove all spaces as a single character. if (unindent) { - _remove_text(cursor.line, cursor.column - indent_size, cursor.line, cursor.column); - prev_column = cursor.column - indent_size; + // we want to remove spaces up to closest indent + // or whole indent if cursor is pointing at it + int spaces_to_delete = _calculate_spaces_till_next_left_indent(cursor.column); + prev_column = cursor.column - spaces_to_delete; + _remove_text(cursor.line, prev_column, cursor.line, cursor.column); } else { _remove_text(prev_line, prev_column, cursor.line, cursor.column); } @@ -1673,6 +1674,10 @@ void TextEdit::indent_right() { int start_line; int end_line; + + // this value informs us by how much we changed selection position by indenting right + // default is 1 for tab indentation + int selection_offset = 1; begin_complex_operation(); if (is_selection_active()) { @@ -1691,18 +1696,24 @@ void TextEdit::indent_right() { for (int i = start_line; i <= end_line; i++) { String line_text = get_line(i); if (indent_using_spaces) { - line_text = space_indent + line_text; + // we don't really care where selection is - we just need to know indentation level at the beginning of the line + int left = _find_first_non_whitespace_column_of_line(line_text); + int spaces_to_add = _calculate_spaces_till_next_right_indent(left); + // since we will add this much spaces we want move whole selection and cursor by this much + selection_offset = spaces_to_add; + for (int j = 0; j < spaces_to_add; j++) + line_text = ' ' + line_text; } else { line_text = '\t' + line_text; } set_line(i, line_text); } - // fix selection and cursor being off by one on the last line + // fix selection and cursor being off after shifting selection right if (is_selection_active()) { - select(selection.from_line, selection.from_column + 1, selection.to_line, selection.to_column + 1); + select(selection.from_line, selection.from_column + selection_offset, selection.to_line, selection.to_column + selection_offset); } - cursor_set_column(cursor.column + 1, false); + cursor_set_column(cursor.column + selection_offset, false); end_complex_operation(); update(); } @@ -1711,6 +1722,15 @@ void TextEdit::indent_left() { int start_line; int end_line; + + // moving cursor and selection after unindenting can get tricky + // because changing content of line can move cursor and selection on it's own (if new line ends before previous position of either) + // therefore we just remember initial values + // and at the end of the operation offset them by number of removed characters + int removed_characters = 0; + int initial_selection_end_column = selection.to_column; + int initial_cursor_column = cursor.column; + begin_complex_operation(); if (is_selection_active()) { @@ -1733,21 +1753,43 @@ void TextEdit::indent_left() { if (line_text.begins_with("\t")) { line_text = line_text.substr(1, line_text.length()); set_line(i, line_text); - } else if (line_text.begins_with(space_indent)) { - line_text = line_text.substr(indent_size, line_text.length()); + removed_characters = 1; + } else if (line_text.begins_with(" ")) { + // when unindenting we aim to remove spaces before line that has selection no matter what is selected + // so we start of by finding first non whitespace character of line + int left = _find_first_non_whitespace_column_of_line(line_text); + + // here we remove only enough spaces to align text to nearest full multiple of indentation_size + // in case where selection begins at the start of indentation_size multiple we remove whole indentation level + int spaces_to_remove = _calculate_spaces_till_next_left_indent(left); + + line_text = line_text.substr(spaces_to_remove, line_text.length()); set_line(i, line_text); + removed_characters = spaces_to_remove; } } // fix selection and cursor being off by one on the last line if (is_selection_active() && last_line_text != get_line(end_line)) { - select(selection.from_line, selection.from_column - 1, selection.to_line, selection.to_column - 1); + select(selection.from_line, selection.from_column - removed_characters, + selection.to_line, initial_selection_end_column - removed_characters); } - cursor_set_column(cursor.column - 1, false); + cursor_set_column(initial_cursor_column - removed_characters, false); end_complex_operation(); update(); } +int TextEdit::_calculate_spaces_till_next_left_indent(int column) { + int spaces_till_indent = column % indent_size; + if (spaces_till_indent == 0) + spaces_till_indent = indent_size; + return spaces_till_indent; +} + +int TextEdit::_calculate_spaces_till_next_right_indent(int column) { + return indent_size - column % indent_size; +} + void TextEdit::_get_mouse_pos(const Point2i &p_mouse, int &r_row, int &r_col) const { float rows = p_mouse.y; @@ -2504,15 +2546,11 @@ void TextEdit::_gui_input(const Ref &p_gui_input) { } else { if (k->get_shift()) { - //simple unindent + // simple unindent int cc = cursor.column; - - const int len = text[cursor.line].length(); const String &line = text[cursor.line]; - int left = 0; // number of whitespace chars at beginning of line - while (left < len && (line[left] == '\t' || line[left] == ' ')) - left++; + int left = _find_first_non_whitespace_column_of_line(line); cc = MIN(cc, left); while (cc < indent_size && cc < left && line[cc] == ' ') @@ -2520,24 +2558,18 @@ void TextEdit::_gui_input(const Ref &p_gui_input) { if (cc > 0 && cc <= text[cursor.line].length()) { if (text[cursor.line][cc - 1] == '\t') { + // tabs unindentation _remove_text(cursor.line, cc - 1, cursor.line, cc); if (cursor.column >= left) cursor_set_column(MAX(0, cursor.column - 1)); update(); } else { - int n = 0; - - for (int i = 1; i <= MIN(cc, indent_size); i++) { - if (line[cc - i] != ' ') { - break; - } - n++; - } - - if (n > 0) { - _remove_text(cursor.line, cc - n, cursor.line, cc); - if (cursor.column > left - n) // inside text? - cursor_set_column(MAX(0, cursor.column - n)); + // spaces unindentation + int spaces_to_remove = _calculate_spaces_till_next_left_indent(cc); + if (spaces_to_remove > 0) { + _remove_text(cursor.line, cc - spaces_to_remove, cursor.line, cc); + if (cursor.column > left - spaces_to_remove) // inside text? + cursor_set_column(MAX(0, cursor.column - spaces_to_remove)); update(); } } @@ -2546,9 +2578,14 @@ void TextEdit::_gui_input(const Ref &p_gui_input) { update(); } } else { - //simple indent + // simple indent if (indent_using_spaces) { - _insert_text_at_cursor(space_indent); + // insert only as much spaces as needed till next indentation level + int spaces_to_add = _calculate_spaces_till_next_right_indent(cursor.column); + String indent_to_insert = String(); + for (int i = 0; i < spaces_to_add; i++) + indent_to_insert = ' ' + indent_to_insert; + _insert_text_at_cursor(indent_to_insert); } else { _insert_text_at_cursor("\t"); } -- cgit v1.2.3