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line_edit.cpp
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line_edit.cpp
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/*************************************************************************/
/* line_edit.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "line_edit.h"
#include "core/message_queue.h"
#include "core/os/keyboard.h"
#include "core/os/os.h"
#include "core/print_string.h"
#include "core/translation.h"
#include "label.h"
#ifdef TOOLS_ENABLED
#include "editor/editor_scale.h"
#include "editor/editor_settings.h"
#endif
static bool _is_text_char(CharType c) {
return !is_symbol(c);
}
void LineEdit::_gui_input(Ref<InputEvent> p_event) {
Ref<InputEventMouseButton> b = p_event;
if (b.is_valid()) {
if (b->is_pressed() && b->get_button_index() == BUTTON_RIGHT && context_menu_enabled) {
menu->set_position(get_global_transform().xform(get_local_mouse_position()));
menu->set_size(Vector2(1, 1));
menu->set_scale(get_global_transform().get_scale());
menu->popup();
grab_focus();
accept_event();
return;
}
if (b->get_button_index() != BUTTON_LEFT)
return;
_reset_caret_blink_timer();
if (b->is_pressed()) {
accept_event(); //don't pass event further when clicked on text field
if (!text.empty() && is_editable() && _is_over_clear_button(b->get_position())) {
clear_button_status.press_attempt = true;
clear_button_status.pressing_inside = true;
return;
}
shift_selection_check_pre(b->get_shift());
set_cursor_at_pixel_pos(b->get_position().x);
if (b->get_shift()) {
selection_fill_at_cursor();
selection.creating = true;
} else {
if (b->is_doubleclick() && selecting_enabled) {
selection.enabled = true;
selection.begin = 0;
selection.end = text.length();
selection.doubleclick = true;
}
selection.drag_attempt = false;
if ((cursor_pos < selection.begin) || (cursor_pos > selection.end) || !selection.enabled) {
deselect();
selection.cursor_start = cursor_pos;
selection.creating = true;
} else if (selection.enabled) {
selection.drag_attempt = true;
}
}
update();
} else {
if (!text.empty() && is_editable() && clear_button_enabled) {
bool press_attempt = clear_button_status.press_attempt;
clear_button_status.press_attempt = false;
if (press_attempt && clear_button_status.pressing_inside && _is_over_clear_button(b->get_position())) {
clear();
return;
}
}
if ((!selection.creating) && (!selection.doubleclick)) {
deselect();
}
selection.creating = false;
selection.doubleclick = false;
if (OS::get_singleton()->has_virtual_keyboard())
OS::get_singleton()->show_virtual_keyboard(text, get_global_rect());
}
update();
}
Ref<InputEventMouseMotion> m = p_event;
if (m.is_valid()) {
if (!text.empty() && is_editable() && clear_button_enabled) {
bool last_press_inside = clear_button_status.pressing_inside;
clear_button_status.pressing_inside = clear_button_status.press_attempt && _is_over_clear_button(m->get_position());
if (last_press_inside != clear_button_status.pressing_inside) {
update();
}
}
if (m->get_button_mask() & BUTTON_LEFT) {
if (selection.creating) {
set_cursor_at_pixel_pos(m->get_position().x);
selection_fill_at_cursor();
}
}
}
Ref<InputEventKey> k = p_event;
if (k.is_valid()) {
if (!k->is_pressed())
return;
#ifdef APPLE_STYLE_KEYS
if (k->get_control() && !k->get_shift() && !k->get_alt() && !k->get_command()) {
uint32_t remap_key = KEY_UNKNOWN;
switch (k->get_scancode()) {
case KEY_F: {
remap_key = KEY_RIGHT;
} break;
case KEY_B: {
remap_key = KEY_LEFT;
} break;
case KEY_P: {
remap_key = KEY_UP;
} break;
case KEY_N: {
remap_key = KEY_DOWN;
} break;
case KEY_D: {
remap_key = KEY_DELETE;
} break;
case KEY_H: {
remap_key = KEY_BACKSPACE;
} break;
}
if (remap_key != KEY_UNKNOWN) {
k->set_scancode(remap_key);
k->set_control(false);
}
}
#endif
unsigned int code = k->get_scancode();
if (k->get_command() && is_shortcut_keys_enabled()) {
bool handled = true;
switch (code) {
case (KEY_X): { // CUT.
if (editable) {
cut_text();
}
} break;
case (KEY_C): { // COPY.
copy_text();
} break;
case (KEY_V): { // PASTE.
if (editable) {
paste_text();
}
} break;
case (KEY_Z): { // Undo/redo.
if (editable) {
if (k->get_shift()) {
redo();
} else {
undo();
}
}
} break;
case (KEY_U): { // Delete from start to cursor.
if (editable) {
deselect();
text = text.substr(cursor_pos, text.length() - cursor_pos);
Ref<Font> font = get_font("font");
cached_width = 0;
if (font != NULL) {
for (int i = 0; i < text.length(); i++)
cached_width += font->get_char_size(text[i]).width;
}
set_cursor_position(0);
_text_changed();
}
} break;
case (KEY_Y): { // PASTE (Yank for unix users).
if (editable) {
paste_text();
}
} break;
case (KEY_K): { // Delete from cursor_pos to end.
if (editable) {
deselect();
text = text.substr(0, cursor_pos);
_text_changed();
}
} break;
case (KEY_A): { // Select all.
select();
} break;
#ifdef APPLE_STYLE_KEYS
case (KEY_LEFT): { // Go to start of text - like HOME key.
set_cursor_position(0);
} break;
case (KEY_RIGHT): { // Go to end of text - like END key.
set_cursor_position(text.length());
} break;
#endif
default: {
handled = false;
}
}
if (handled) {
accept_event();
return;
}
}
_reset_caret_blink_timer();
if (!k->get_metakey()) {
bool handled = true;
switch (code) {
case KEY_KP_ENTER:
case KEY_ENTER: {
emit_signal("text_entered", text);
if (OS::get_singleton()->has_virtual_keyboard())
OS::get_singleton()->hide_virtual_keyboard();
return;
} break;
case KEY_BACKSPACE: {
if (!editable)
break;
if (selection.enabled) {
selection_delete();
break;
}
#ifdef APPLE_STYLE_KEYS
if (k->get_alt()) {
#else
if (k->get_alt()) {
handled = false;
break;
} else if (k->get_command()) {
#endif
int cc = cursor_pos;
bool prev_char = false;
while (cc > 0) {
bool ischar = _is_text_char(text[cc - 1]);
if (prev_char && !ischar)
break;
prev_char = ischar;
cc--;
}
delete_text(cc, cursor_pos);
set_cursor_position(cc);
} else {
delete_char();
}
} break;
case KEY_KP_4: {
if (k->get_unicode() != 0) {
handled = false;
break;
}
FALLTHROUGH;
}
case KEY_LEFT: {
#ifndef APPLE_STYLE_KEYS
if (!k->get_alt())
#endif
shift_selection_check_pre(k->get_shift());
#ifdef APPLE_STYLE_KEYS
if (k->get_command()) {
set_cursor_position(0);
} else if (k->get_alt()) {
#else
if (k->get_alt()) {
handled = false;
break;
} else if (k->get_command()) {
#endif
bool prev_char = false;
int cc = cursor_pos;
while (cc > 0) {
bool ischar = _is_text_char(text[cc - 1]);
if (prev_char && !ischar)
break;
prev_char = ischar;
cc--;
}
set_cursor_position(cc);
} else {
set_cursor_position(get_cursor_position() - 1);
}
shift_selection_check_post(k->get_shift());
} break;
case KEY_KP_6: {
if (k->get_unicode() != 0) {
handled = false;
break;
}
FALLTHROUGH;
}
case KEY_RIGHT: {
shift_selection_check_pre(k->get_shift());
#ifdef APPLE_STYLE_KEYS
if (k->get_command()) {
set_cursor_position(text.length());
} else if (k->get_alt()) {
#else
if (k->get_alt()) {
handled = false;
break;
} else if (k->get_command()) {
#endif
bool prev_char = false;
int cc = cursor_pos;
while (cc < text.length()) {
bool ischar = _is_text_char(text[cc]);
if (prev_char && !ischar)
break;
prev_char = ischar;
cc++;
}
set_cursor_position(cc);
} else {
set_cursor_position(get_cursor_position() + 1);
}
shift_selection_check_post(k->get_shift());
} break;
case KEY_UP: {
shift_selection_check_pre(k->get_shift());
if (get_cursor_position() == 0) handled = false;
set_cursor_position(0);
shift_selection_check_post(k->get_shift());
} break;
case KEY_DOWN: {
shift_selection_check_pre(k->get_shift());
if (get_cursor_position() == text.length()) handled = false;
set_cursor_position(text.length());
shift_selection_check_post(k->get_shift());
} break;
case KEY_DELETE: {
if (!editable)
break;
if (k->get_shift() && !k->get_command() && !k->get_alt()) {
cut_text();
break;
}
if (selection.enabled) {
selection_delete();
break;
}
int text_len = text.length();
if (cursor_pos == text_len)
break; // Nothing to do.
#ifdef APPLE_STYLE_KEYS
if (k->get_alt()) {
#else
if (k->get_alt()) {
handled = false;
break;
} else if (k->get_command()) {
#endif
int cc = cursor_pos;
bool prev_char = false;
while (cc < text.length()) {
bool ischar = _is_text_char(text[cc]);
if (prev_char && !ischar)
break;
prev_char = ischar;
cc++;
}
delete_text(cursor_pos, cc);
} else {
set_cursor_position(cursor_pos + 1);
delete_char();
}
} break;
case KEY_KP_7: {
if (k->get_unicode() != 0) {
handled = false;
break;
}
FALLTHROUGH;
}
case KEY_HOME: {
shift_selection_check_pre(k->get_shift());
set_cursor_position(0);
shift_selection_check_post(k->get_shift());
} break;
case KEY_KP_1: {
if (k->get_unicode() != 0) {
handled = false;
break;
}
FALLTHROUGH;
}
case KEY_END: {
shift_selection_check_pre(k->get_shift());
set_cursor_position(text.length());
shift_selection_check_post(k->get_shift());
} break;
case KEY_MENU: {
if (context_menu_enabled) {
Point2 pos = Point2(get_cursor_pixel_pos(), (get_size().y + get_font("font")->get_height()) / 2);
menu->set_position(get_global_transform().xform(pos));
menu->set_size(Vector2(1, 1));
menu->set_scale(get_global_transform().get_scale());
menu->popup();
menu->grab_focus();
}
} break;
default: {
handled = false;
} break;
}
if (handled) {
accept_event();
} else if (!k->get_command()) {
if (k->get_unicode() >= 32 && k->get_scancode() != KEY_DELETE) {
if (editable) {
selection_delete();
CharType ucodestr[2] = { (CharType)k->get_unicode(), 0 };
append_at_cursor(ucodestr);
_text_changed();
accept_event();
}
} else {
return;
}
}
update();
}
return;
}
}
void LineEdit::set_align(Align p_align) {
ERR_FAIL_INDEX((int)p_align, 4);
align = p_align;
update();
}
LineEdit::Align LineEdit::get_align() const {
return align;
}
Variant LineEdit::get_drag_data(const Point2 &p_point) {
if (selection.drag_attempt && selection.enabled) {
String t = text.substr(selection.begin, selection.end - selection.begin);
Label *l = memnew(Label);
l->set_text(t);
set_drag_preview(l);
return t;
}
return Variant();
}
bool LineEdit::can_drop_data(const Point2 &p_point, const Variant &p_data) const {
return p_data.get_type() == Variant::STRING;
}
void LineEdit::drop_data(const Point2 &p_point, const Variant &p_data) {
if (p_data.get_type() == Variant::STRING) {
set_cursor_at_pixel_pos(p_point.x);
int selected = selection.end - selection.begin;
Ref<Font> font = get_font("font");
if (font != NULL) {
for (int i = selection.begin; i < selection.end; i++)
cached_width -= font->get_char_size(text[i]).width;
}
text.erase(selection.begin, selected);
append_at_cursor(p_data);
selection.begin = cursor_pos - selected;
selection.end = cursor_pos;
}
}
Control::CursorShape LineEdit::get_cursor_shape(const Point2 &p_pos) const {
if (!text.empty() && is_editable() && _is_over_clear_button(p_pos)) {
return CURSOR_ARROW;
}
return Control::get_cursor_shape(p_pos);
}
bool LineEdit::_is_over_clear_button(const Point2 &p_pos) const {
if (!clear_button_enabled || !has_point(p_pos)) {
return false;
}
Ref<Texture> icon = Control::get_icon("clear");
int x_ofs = get_stylebox("normal")->get_offset().x;
return p_pos.x > get_size().width - icon->get_width() - x_ofs;
}
void LineEdit::_notification(int p_what) {
switch (p_what) {
#ifdef TOOLS_ENABLED
case NOTIFICATION_ENTER_TREE: {
if (Engine::get_singleton()->is_editor_hint() && !get_tree()->is_node_being_edited(this)) {
cursor_set_blink_enabled(EDITOR_DEF("text_editor/cursor/caret_blink", false));
cursor_set_blink_speed(EDITOR_DEF("text_editor/cursor/caret_blink_speed", 0.65));
if (!EditorSettings::get_singleton()->is_connected("settings_changed", this, "_editor_settings_changed")) {
EditorSettings::get_singleton()->connect("settings_changed", this, "_editor_settings_changed");
}
}
} break;
#endif
case NOTIFICATION_RESIZED: {
window_pos = 0;
set_cursor_position(get_cursor_position());
} break;
case NOTIFICATION_TRANSLATION_CHANGED: {
placeholder_translated = tr(placeholder);
update_placeholder_width();
update();
} break;
case MainLoop::NOTIFICATION_WM_FOCUS_IN: {
window_has_focus = true;
draw_caret = true;
update();
} break;
case MainLoop::NOTIFICATION_WM_FOCUS_OUT: {
window_has_focus = false;
draw_caret = false;
update();
} break;
case NOTIFICATION_DRAW: {
if ((!has_focus() && !menu->has_focus()) || !window_has_focus) {
draw_caret = false;
}
int width, height;
Size2 size = get_size();
width = size.width;
height = size.height;
RID ci = get_canvas_item();
Ref<StyleBox> style = get_stylebox("normal");
if (!is_editable()) {
style = get_stylebox("read_only");
draw_caret = false;
}
Ref<Font> font = get_font("font");
style->draw(ci, Rect2(Point2(), size));
if (has_focus()) {
get_stylebox("focus")->draw(ci, Rect2(Point2(), size));
}
int x_ofs = 0;
bool using_placeholder = text.empty() && ime_text.empty();
int cached_text_width = using_placeholder ? cached_placeholder_width : cached_width;
switch (align) {
case ALIGN_FILL:
case ALIGN_LEFT: {
x_ofs = style->get_offset().x;
} break;
case ALIGN_CENTER: {
if (window_pos != 0)
x_ofs = style->get_offset().x;
else
x_ofs = MAX(style->get_margin(MARGIN_LEFT), int(size.width - (cached_text_width)) / 2);
} break;
case ALIGN_RIGHT: {
x_ofs = MAX(style->get_margin(MARGIN_LEFT), int(size.width - style->get_margin(MARGIN_RIGHT) - (cached_text_width)));
} break;
}
int ofs_max = width - style->get_margin(MARGIN_RIGHT);
int char_ofs = window_pos;
int y_area = height - style->get_minimum_size().height;
int y_ofs = style->get_offset().y + (y_area - font->get_height()) / 2;
int font_ascent = font->get_ascent();
Color selection_color = get_color("selection_color");
Color font_color = is_editable() ? get_color("font_color") : get_color("font_color_uneditable");
Color font_color_selected = get_color("font_color_selected");
Color cursor_color = get_color("cursor_color");
const String &t = using_placeholder ? placeholder_translated : text;
// Draw placeholder color.
if (using_placeholder)
font_color.a *= placeholder_alpha;
bool display_clear_icon = !using_placeholder && is_editable() && clear_button_enabled;
if (right_icon.is_valid() || display_clear_icon) {
Ref<Texture> r_icon = display_clear_icon ? Control::get_icon("clear") : right_icon;
Color color_icon(1, 1, 1, !is_editable() ? .5 * .9 : .9);
if (display_clear_icon) {
if (clear_button_status.press_attempt && clear_button_status.pressing_inside) {
color_icon = get_color("clear_button_color_pressed");
} else {
color_icon = get_color("clear_button_color");
}
}
r_icon->draw(ci, Point2(width - r_icon->get_width() - style->get_margin(MARGIN_RIGHT), height / 2 - r_icon->get_height() / 2), color_icon);
if (align == ALIGN_CENTER) {
if (window_pos == 0) {
x_ofs = MAX(style->get_margin(MARGIN_LEFT), int(size.width - cached_text_width - r_icon->get_width() - style->get_margin(MARGIN_RIGHT) * 2) / 2);
}
} else {
x_ofs = MAX(style->get_margin(MARGIN_LEFT), x_ofs - r_icon->get_width() - style->get_margin(MARGIN_RIGHT));
}
ofs_max -= r_icon->get_width();
}
int caret_height = font->get_height() > y_area ? y_area : font->get_height();
FontDrawer drawer(font, Color(1, 1, 1));
while (true) {
// End of string, break.
if (char_ofs >= t.length())
break;
if (char_ofs == cursor_pos) {
if (ime_text.length() > 0) {
int ofs = 0;
while (true) {
if (ofs >= ime_text.length())
break;
CharType cchar = (pass && !text.empty()) ? secret_character[0] : ime_text[ofs];
CharType next = (pass && !text.empty()) ? secret_character[0] : ime_text[ofs + 1];
int im_char_width = font->get_char_size(cchar, next).width;
if ((x_ofs + im_char_width) > ofs_max)
break;
bool selected = ofs >= ime_selection.x && ofs < ime_selection.x + ime_selection.y;
if (selected) {
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(x_ofs, y_ofs + caret_height), Size2(im_char_width, 3)), font_color);
} else {
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(x_ofs, y_ofs + caret_height), Size2(im_char_width, 1)), font_color);
}
drawer.draw_char(ci, Point2(x_ofs, y_ofs + font_ascent), cchar, next, font_color);
x_ofs += im_char_width;
ofs++;
}
}
}
CharType cchar = (pass && !text.empty()) ? secret_character[0] : t[char_ofs];
CharType next = (pass && !text.empty()) ? secret_character[0] : t[char_ofs + 1];
int char_width = font->get_char_size(cchar, next).width;
// End of widget, break.
if ((x_ofs + char_width) > ofs_max)
break;
bool selected = selection.enabled && char_ofs >= selection.begin && char_ofs < selection.end;
if (selected)
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(x_ofs, y_ofs), Size2(char_width, caret_height)), selection_color);
int yofs = y_ofs + (caret_height - font->get_height()) / 2;
drawer.draw_char(ci, Point2(x_ofs, yofs + font_ascent), cchar, next, selected ? font_color_selected : font_color);
if (char_ofs == cursor_pos && draw_caret && !using_placeholder) {
if (ime_text.length() == 0) {
#ifdef TOOLS_ENABLED
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(x_ofs, y_ofs), Size2(Math::round(EDSCALE), caret_height)), cursor_color);
#else
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(x_ofs, y_ofs), Size2(1, caret_height)), cursor_color);
#endif
}
}
x_ofs += char_width;
char_ofs++;
}
if (char_ofs == cursor_pos) {
if (ime_text.length() > 0) {
int ofs = 0;
while (true) {
if (ofs >= ime_text.length())
break;
CharType cchar = (pass && !text.empty()) ? secret_character[0] : ime_text[ofs];
CharType next = (pass && !text.empty()) ? secret_character[0] : ime_text[ofs + 1];
int im_char_width = font->get_char_size(cchar, next).width;
if ((x_ofs + im_char_width) > ofs_max)
break;
bool selected = ofs >= ime_selection.x && ofs < ime_selection.x + ime_selection.y;
if (selected) {
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(x_ofs, y_ofs + caret_height), Size2(im_char_width, 3)), font_color);
} else {
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(x_ofs, y_ofs + caret_height), Size2(im_char_width, 1)), font_color);
}
drawer.draw_char(ci, Point2(x_ofs, y_ofs + font_ascent), cchar, next, font_color);
x_ofs += im_char_width;
ofs++;
}
}
}
if ((char_ofs == cursor_pos || using_placeholder) && draw_caret) { // May be at the end, or placeholder.
if (ime_text.length() == 0) {
int caret_x_ofs = x_ofs;
if (using_placeholder) {
switch (align) {
case ALIGN_LEFT:
case ALIGN_FILL: {
caret_x_ofs = style->get_offset().x;
} break;
case ALIGN_CENTER: {
caret_x_ofs = ofs_max / 2;
} break;
case ALIGN_RIGHT: {
caret_x_ofs = ofs_max;
} break;
}
}
#ifdef TOOLS_ENABLED
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(caret_x_ofs, y_ofs), Size2(Math::round(EDSCALE), caret_height)), cursor_color);
#else
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(Point2(caret_x_ofs, y_ofs), Size2(1, caret_height)), cursor_color);
#endif
}
}
if (has_focus()) {
OS::get_singleton()->set_ime_active(true);
OS::get_singleton()->set_ime_position(get_global_position() + Point2(using_placeholder ? 0 : x_ofs, y_ofs + caret_height));
}
} break;
case NOTIFICATION_FOCUS_ENTER: {
if (caret_blink_enabled) {
caret_blink_timer->start();
} else {
draw_caret = true;
}
OS::get_singleton()->set_ime_active(true);
Point2 cursor_pos = Point2(get_cursor_position(), 1) * get_minimum_size().height;
OS::get_singleton()->set_ime_position(get_global_position() + cursor_pos);
if (OS::get_singleton()->has_virtual_keyboard())
OS::get_singleton()->show_virtual_keyboard(text, get_global_rect());
} break;
case NOTIFICATION_FOCUS_EXIT: {
if (caret_blink_enabled) {
caret_blink_timer->stop();
}
OS::get_singleton()->set_ime_position(Point2());
OS::get_singleton()->set_ime_active(false);
ime_text = "";
ime_selection = Point2();
if (OS::get_singleton()->has_virtual_keyboard())
OS::get_singleton()->hide_virtual_keyboard();
} break;
case MainLoop::NOTIFICATION_OS_IME_UPDATE: {
if (has_focus()) {
ime_text = OS::get_singleton()->get_ime_text();
ime_selection = OS::get_singleton()->get_ime_selection();
update();
}
} break;
}
}
void LineEdit::copy_text() {
if (selection.enabled && !pass) {
OS::get_singleton()->set_clipboard(text.substr(selection.begin, selection.end - selection.begin));
}
}
void LineEdit::cut_text() {
if (selection.enabled && !pass) {
OS::get_singleton()->set_clipboard(text.substr(selection.begin, selection.end - selection.begin));
selection_delete();
}
}
void LineEdit::paste_text() {
// Strip escape characters like \n and \t as they can't be displayed on LineEdit.
String paste_buffer = OS::get_singleton()->get_clipboard().strip_escapes();
if (paste_buffer != "") {
if (selection.enabled) selection_delete();
append_at_cursor(paste_buffer);
if (!text_changed_dirty) {
if (is_inside_tree()) {
MessageQueue::get_singleton()->push_call(this, "_text_changed");
}
text_changed_dirty = true;
}
}
}
void LineEdit::undo() {
if (undo_stack_pos == NULL) {
if (undo_stack.size() <= 1) {
return;
}
undo_stack_pos = undo_stack.back();
} else if (undo_stack_pos == undo_stack.front()) {
return;
}
undo_stack_pos = undo_stack_pos->prev();
TextOperation op = undo_stack_pos->get();
text = op.text;
cached_width = op.cached_width;
window_pos = op.window_pos;
set_cursor_position(op.cursor_pos);
if (expand_to_text_length)
minimum_size_changed();
_emit_text_change();
}
void LineEdit::redo() {
if (undo_stack_pos == NULL) {
return;