void textbox::append_text(const std::string& text, bool auto_scroll, const SDL_Color& color)
{
if(text_image_.get() == NULL) {
set_text(text, color);
return;
}
//disallow adding multi-line text to a single-line text box
if(wrap_ == false && std::find_if(text.begin(),text.end(),utils::isnewline) != text.end()) {
return;
}
const bool is_at_bottom = get_position() == get_max_position();
const wide_string& wtext = utils::string_to_wstring(text);
const surface new_text = add_text_line(wtext, color);
const surface new_surface = create_compatible_surface(text_image_,std::max<size_t>(text_image_->w,new_text->w),text_image_->h+new_text->h);
SDL_SetAlpha(new_text.get(),0,0);
SDL_SetAlpha(text_image_.get(),0,0);
SDL_BlitSurface(text_image_,NULL,new_surface,NULL);
SDL_Rect target = {0,text_image_->h,new_text->w,new_text->h};
SDL_BlitSurface(new_text,NULL,new_surface,&target);
text_image_.assign(new_surface);
text_.resize(text_.size() + wtext.size());
std::copy(wtext.begin(),wtext.end(),text_.end()-wtext.size());
set_dirty(true);
update_text_cache(false);
if(auto_scroll && is_at_bottom) scroll_to_bottom();
handle_text_changed(text_);
}
// set_text does not respect max_size_
void textbox::set_text(const std::string& text, const SDL_Color& color)
{
text_ = utils::string_to_wstring(text);
cursor_ = text_.size();
text_pos_ = 0;
selstart_ = -1;
selend_ = -1;
set_dirty(true);
update_text_cache(true, color);
handle_text_changed(text_);
}
void text_entry::try_delete_selection() {
if (!_is_read_only) {
if (get_selection_length() > 0) {
_text.erase(get_selection_begin(), get_selection_length());
_caret_pos += std::min(0, _selection_pos - _caret_pos);
_selection_pos = _caret_pos;
make_caret_visible();
handle_text_changed();
}
}
}
void textbox::clear()
{
text_.clear();
cursor_ = 0;
cursor_pos_ = 0;
text_pos_ = 0;
selstart_ = -1;
selend_ = -1;
set_dirty(true);
update_text_cache(true);
handle_text_changed(text_);
}
void text_entry::paste_text_from_clipboard(clipboard& clipboard) {
if (!_is_read_only) {
try_delete_selection();
std::wstring paste_text = clipboard.get_clipboard_text();
std::wstring new_text = _text;
new_text.insert(_caret_pos, paste_text);
copy_text_to_fit(new_text.c_str());
move_caret_right(paste_text.length(), false);
handle_text_changed();
}
}
void text_entry::handle_delete_key_down() {
if (!_is_read_only) {
if (get_selection_length() > 0) {
try_delete_selection();
}
else {
if (!_text.empty() && _caret_pos < uint_to_int(_text.length())) {
_text.erase(_caret_pos, 1);
handle_text_changed();
}
}
}
}
void text_entry::try_add_char(wchar_t c) {
if (!_is_read_only) {
if (is_char_valid(c)) {
try_delete_selection();
if (_text.length() < _max_text_length) {
_text.insert(_caret_pos, 1, c);
move_caret_right(1, false);
handle_text_changed();
handle_char_added(c);
}
}
}
}
void text_entry::handle_backspace_key_down() {
if (!_is_read_only) {
if (get_selection_length() > 0) {
try_delete_selection();
}
else {
if (!_text.empty() && _caret_pos > 0) {
_text.erase(_caret_pos - 1, 1);
move_caret_left(1, false);
handle_text_changed();
}
}
}
}
void textbox::handle_event(const SDL_Event& event)
{
scrollarea::handle_event(event);
if(hidden())
return;
bool changed = false;
const int old_selstart = selstart_;
const int old_selend = selend_;
//Sanity check: verify that selection start and end are within text
//boundaries
if(is_selection() && !(size_t(selstart_) <= text_.size() && size_t(selend_) <= text_.size())) {
WRN_DP << "out-of-boundary selection\n";
selstart_ = selend_ = -1;
}
int mousex, mousey;
const Uint8 mousebuttons = SDL_GetMouseState(&mousex,&mousey);
if(!(mousebuttons & SDL_BUTTON(1))) {
grabmouse_ = false;
}
SDL_Rect const &loc = inner_location();
bool clicked_inside = !mouse_locked() && (event.type == SDL_MOUSEBUTTONDOWN
&& (mousebuttons & SDL_BUTTON(1))
&& point_in_rect(mousex, mousey, loc));
if(clicked_inside) {
set_focus(true);
}
if ((grabmouse_ && (!mouse_locked() && event.type == SDL_MOUSEMOTION)) || clicked_inside) {
const int x = mousex - loc.x + text_pos_;
const int y = mousey - loc.y;
int pos = 0;
int distance = x;
for(unsigned int i = 1; i < char_x_.size(); ++i) {
if(static_cast<int>(yscroll_) + y < char_y_[i]) {
break;
}
// Check individually each distance (if, one day, we support
// RTL languages, char_x_[c] may not be monotonous.)
if(abs(x - char_x_[i]) < distance && yscroll_ + y < char_y_[i] + line_height_) {
pos = i;
distance = abs(x - char_x_[i]);
}
}
cursor_ = pos;
if(grabmouse_)
selend_ = cursor_;
update_text_cache(false);
if(!grabmouse_ && mousebuttons & SDL_BUTTON(1)) {
grabmouse_ = true;
selstart_ = selend_ = cursor_;
} else if (! (mousebuttons & SDL_BUTTON(1))) {
grabmouse_ = false;
}
set_dirty();
}
if(editable_ == false) {
return;
}
//if we don't have the focus, then see if we gain the focus,
//otherwise return
if(focus(&event) == false) {
if (!mouse_locked() && event.type == SDL_MOUSEMOTION && point_in_rect(mousex, mousey, loc))
events::focus_handler(this);
return;
}
if(event.type != SDL_KEYDOWN || focus(&event) != true) {
draw();
return;
}
const SDL_keysym& key = reinterpret_cast<const SDL_KeyboardEvent&>(event).keysym;
const SDLMod modifiers = SDL_GetModState();
const int c = key.sym;
const int old_cursor = cursor_;
if(c == SDLK_LEFT && cursor_ > 0)
--cursor_;
if(c == SDLK_RIGHT && cursor_ < static_cast<int>(text_.size()))
++cursor_;
// ctrl-a, ctrl-e and ctrl-u are readline style shortcuts, even on Macs
if(c == SDLK_END || (c == SDLK_e && (modifiers & KMOD_CTRL)))
cursor_ = text_.size();
if(c == SDLK_HOME || (c == SDLK_a && (modifiers & KMOD_CTRL)))
cursor_ = 0;
if((old_cursor != cursor_) && (modifiers & KMOD_SHIFT)) {
if(selstart_ == -1)
selstart_ = old_cursor;
selend_ = cursor_;
}
if(c == SDLK_BACKSPACE) {
changed = true;
if(is_selection()) {
erase_selection();
} else if(cursor_ > 0) {
--cursor_;
text_.erase(text_.begin()+cursor_);
}
}
if(c == SDLK_u && (modifiers & KMOD_CTRL)) { // clear line
changed = true;
cursor_ = 0;
text_.resize(0);
}
if(c == SDLK_DELETE && !text_.empty()) {
changed = true;
if(is_selection()) {
erase_selection();
} else {
if(cursor_ < static_cast<int>(text_.size())) {
text_.erase(text_.begin()+cursor_);
}
}
}
wchar_t character = key.unicode;
//movement characters may have a "Unicode" field on some platforms, so ignore it.
if(!(c == SDLK_UP || c == SDLK_DOWN || c == SDLK_LEFT || c == SDLK_RIGHT ||
c == SDLK_DELETE || c == SDLK_BACKSPACE || c == SDLK_END || c == SDLK_HOME ||
c == SDLK_PAGEUP || c == SDLK_PAGEDOWN)) {
if(character != 0) {
DBG_G << "Char: " << character << ", c = " << c << "\n";
}
if(event.key.keysym.mod & copypaste_modifier) {
switch(c) {
case SDLK_v: // paste
{
changed = true;
if(is_selection())
erase_selection();
std::string str = copy_from_clipboard(false);
//cut off anything after the first newline
str.erase(std::find_if(str.begin(),str.end(),utils::isnewline),str.end());
wide_string s = utils::string_to_wstring(str);
if(text_.size() < max_size_) {
if(s.size() + text_.size() > max_size_) {
s.resize(max_size_ - text_.size());
}
text_.insert(text_.begin()+cursor_, s.begin(), s.end());
cursor_ += s.size();
}
}
break;
case SDLK_c: // copy
{
const size_t beg = std::min<size_t>(size_t(selstart_),size_t(selend_));
const size_t end = std::max<size_t>(size_t(selstart_),size_t(selend_));
wide_string ws = wide_string(text_.begin() + beg, text_.begin() + end);
std::string s = utils::wstring_to_string(ws);
copy_to_clipboard(s, false);
}
break;
}
} else {
if(character >= 32 && character != 127) {
changed = true;
if(is_selection())
erase_selection();
if(text_.size() + 1 <= max_size_) {
text_.insert(text_.begin()+cursor_,character);
++cursor_;
}
}
}
}
if(is_selection() && (selend_ != cursor_))
selstart_ = selend_ = -1;
//since there has been cursor activity, make the cursor appear for
//at least the next 500ms.
show_cursor_ = true;
show_cursor_at_ = SDL_GetTicks();
if(changed || old_cursor != cursor_ || old_selstart != selstart_ || old_selend != selend_) {
text_image_ = NULL;
handle_text_changed(text_);
}
set_dirty(true);
}
