source/entry.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/meshbuilder.h>
   3 #include <msp/gl/texture.h>
   4 #include <msp/input/keys.h>
   5 #include "entry.h"
   6 #include "graphic.h"
   7 #include "part.h"
   8 #include "slider.h"
   9 #include "style.h"
  10
  11 using namespace std;
  12
  13 namespace Msp {
  14 namespace GLtk {
  15
  16 Entry::Entry(const string &t)
  17 {
  18         input_type = INPUT_TEXT;
  19         set_text(t);
  20 }
  21
  22 void Entry::autosize_special(const Part &part, Geometry &ageom) const
  23 {
  24         if(part.get_name()=="text")
  25         {
  26                 const Sides &margin = part.get_margin();
  27                 const GL::Font &font = style->get_font();
  28                 unsigned en_width = static_cast<unsigned>(font.get_string_width("n")*style->get_font_size());
  29                 ageom.w = max(ageom.w, edit_width*en_width+margin.left+margin.right);
  30
  31                 unsigned line_height = static_cast<unsigned>((font.get_ascent()-font.get_descent())*style->get_font_size());
  32                 if(multiline)
  33                 {
  34                         unsigned line_spacing = style->get_font_size()*6/5;
  35                         ageom.h = max(ageom.h, line_height+line_spacing*(edit_height-1)+margin.top+margin.bottom);
  36                 }
  37                 else
  38                         ageom.h = max(ageom.h, line_height+margin.top+margin.bottom);
  39         }
  40         else if(part.get_name()=="slider" && multiline)
  41                 autosize_child(*slider, part, ageom);
  42 }
  43
  44 void Entry::set_text(const string &t)
  45 {
  46         if(t!=text.get())
  47         {
  48                 text = t;
  49                 signal_text_changed.emit(text.get());
  50         }
  51         set_edit_position(text.size());
  52 }
  53
  54 void Entry::insert(size_t pos, const string &t)
  55 {
  56         if(t.empty())
  57                 return;
  58
  59         text.insert(pos, t);
  60         signal_text_changed.emit(text.get());
  61
  62         adjust_edit_position_for_change(pos, t.size());
  63         if(multiline)
  64                 check_view_range();
  65
  66         mark_rebuild();
  67 }
  68
  69 void Entry::erase(size_t pos, size_t len)
  70 {
  71         if(!len)
  72                 return;
  73
  74         text.erase(pos, len);
  75         signal_text_changed.emit(text.get());
  76
  77         adjust_edit_position_for_change(pos, -len);
  78         if(multiline)
  79                 check_view_range();
  80
  81         mark_rebuild();
  82 }
  83
  84 bool Entry::get_selection(size_t &start, size_t &end) const
  85 {
  86         if(!selection_active)
  87                 return false;
  88
  89         start = selection_pos;
  90         end = edit_pos;
  91         if(start>end)
  92                 swap(start, end);
  93
  94         return true;
  95 }
  96
  97 void Entry::translate_position(size_t pos, size_t &row, size_t &col) const
  98 {
  99         text.offset_to_coords(pos, row, col);
 100 }
 101
 102 size_t Entry::translate_position(size_t row, size_t col) const
 103 {
 104         return text.coords_to_offset(row, col);
 105 }
 106
 107 void Entry::set_edit_size(unsigned w, unsigned h)
 108 {
 109         edit_width = w;
 110         edit_height = h;
 111         signal_autosize_changed.emit();
 112 }
 113
 114 void Entry::set_multiline(bool m)
 115 {
 116         multiline = m;
 117         if(multiline)
 118         {
 119                 if(!slider)
 120                 {
 121                         unique_ptr<VSlider> s = make_unique<VSlider>();
 122                         slider = s.get();
 123                         add(move(s));
 124                         slider->set_step(1);
 125                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
 126                         mark_rebuild();
 127                 }
 128                 check_view_range();
 129         }
 130 }
 131
 132 void Entry::rebuild_special(const Part &part)
 133 {
 134         if(part.get_name()=="text")
 135                 text.build(part, state, geom, first_row, part_cache);
 136         else if(part.get_name()=="cursor")
 137         {
 138                 State cursor_state = (cursor_blink ? ACTIVE : NORMAL);
 139                 const Graphic *graphic = part.get_graphic(state|cursor_state);
 140                 if(!text_part || !graphic || !graphic->get_texture())
 141                         return;
 142
 143                 size_t row, col;
 144                 text.offset_to_coords(edit_pos, row, col);
 145
 146                 if(row<first_row || row>=first_row+visible_rows)
 147                         return;
 148
 149                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 150
 151                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 152                 bld.transform(GL::Matrix::translation(rgeom.x, rgeom.y, 0));
 153                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 154         }
 155         else if(part.get_name()=="selection")
 156         {
 157                 if(!selection_active)
 158                         return;
 159
 160                 const Graphic *graphic = part.get_graphic(state);
 161                 if(!text_part || !graphic || !graphic->get_texture())
 162                         return;
 163
 164                 size_t start, end;
 165                 get_selection(start, end);
 166
 167                 size_t row, col;
 168                 text.offset_to_coords(start, row, col);
 169                 size_t end_row, end_col;
 170                 text.offset_to_coords(end, end_row, end_col);
 171
 172                 if(end_row<first_row || row>=first_row+visible_rows)
 173                         return;
 174
 175                 if(row<first_row)
 176                 {
 177                         row = first_row;
 178                         col = 0;
 179                 }
 180
 181                 if(end_row>=first_row+visible_rows)
 182                 {
 183                         end_row = first_row+visible_rows-1;
 184                         end_col = text.get_line_length(end_row);
 185                 }
 186
 187                 while(row<=end_row)
 188                 {
 189                         size_t ec = (row==end_row ? end_col : text.get_line_length(row));
 190                         if(ec>col)
 191                         {
 192                                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 193                                 Geometry egeom = text.coords_to_geometry(*text_part, geom, first_row, row, ec);
 194
 195                                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 196                                 bld.transform(GL::Matrix::translation(rgeom.x, rgeom.y, 0));
 197                                 graphic->build(egeom.x-rgeom.x, part.get_geometry().h, bld);
 198                         }
 199
 200                         ++row;
 201                         col = 0;
 202                 }
 203         }
 204         else if(part.get_name()=="slider")
 205         {
 206                 if(multiline)
 207                 {
 208                         reposition_child(*slider, part);
 209                         Widget::rebuild_special(part);
 210                 }
 211         }
 212         else
 213                 Widget::rebuild_special(part);
 214 }
 215
 216 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 217 {
 218         if(part.get_name()=="slider" && multiline)
 219                 slider->render(renderer);
 220 }
 221
 222 void Entry::touch_press(int x, int y, unsigned finger)
 223 {
 224         if(finger==0)
 225                 set_focus();
 226         Widget::touch_press(x, y, finger);
 227 }
 228
 229 bool Entry::key_press(unsigned key, unsigned mod)
 230 {
 231         got_key_press = true;
 232         if(key==Input::KEY_BACKSPACE)
 233         {
 234                 if(selection_active)
 235                         erase_selection(true);
 236                 else if(edit_pos>0)
 237                 {
 238                         size_t start_pos = text.move_offset(edit_pos, -1);
 239                         erase(start_pos, edit_pos-start_pos);
 240                 }
 241         }
 242         else if(key==Input::KEY_DELETE)
 243         {
 244                 if(selection_active)
 245                         erase_selection(true);
 246                 else
 247                 {
 248                         size_t end_pos = text.move_offset(edit_pos, 1);
 249                         erase(edit_pos, end_pos-edit_pos);
 250                 }
 251         }
 252         else if(key==Input::KEY_ENTER && multiline)
 253                 insert(edit_pos, "\n");
 254         else if(key==Input::KEY_END)
 255         {
 256                 size_t row, col;
 257                 text.offset_to_coords(edit_pos, row, col);
 258                 set_edit_position(text.coords_to_offset(row, text.get_line_length(row)), mod==MOD_SHIFT);
 259         }
 260         else if(key==Input::KEY_HOME)
 261         {
 262                 size_t row, col;
 263                 text.offset_to_coords(edit_pos, row, col);
 264                 set_edit_position(text.coords_to_offset(row, 0), mod==MOD_SHIFT);
 265         }
 266         else if(key==Input::KEY_PGUP)
 267         {
 268                 size_t row, col;
 269                 text.offset_to_coords(edit_pos, row, col);
 270                 set_edit_position(text.coords_to_offset((row<visible_rows ? 0 : row-visible_rows), col), mod==MOD_SHIFT);
 271         }
 272         else if(key==Input::KEY_PGDN)
 273         {
 274                 size_t row, col;
 275                 text.offset_to_coords(edit_pos, row, col);
 276                 set_edit_position(text.coords_to_offset(row+visible_rows, col), mod==MOD_SHIFT);
 277         }
 278         else if(key==Input::KEY_LEFT && mod==MOD_SHIFT)
 279                 move_edit_position(NAV_LEFT, true);
 280         else if(key==Input::KEY_RIGHT && mod==MOD_SHIFT)
 281                 move_edit_position(NAV_RIGHT, true);
 282         else if(key==Input::KEY_UP && mod==MOD_SHIFT && multiline)
 283                 move_edit_position(NAV_UP, true);
 284         else if(key==Input::KEY_DOWN && mod==MOD_SHIFT && multiline)
 285                 move_edit_position(NAV_DOWN, true);
 286         else
 287                 return false;
 288
 289         return true;
 290 }
 291
 292 bool Entry::character(wchar_t ch)
 293 {
 294         if(got_key_press && ch>=' ' && ch!=0x7F)
 295         {
 296                 if(selection_active)
 297                         erase_selection(false);
 298                 insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 299                 return true;
 300         }
 301
 302         return false;
 303 }
 304
 305 void Entry::focus_in()
 306 {
 307         cursor_blink = true;
 308         Widget::focus_in();
 309         check_cursor_blink();
 310 }
 311
 312 void Entry::focus_out()
 313 {
 314         Widget::focus_out();
 315         got_key_press = false;
 316         check_cursor_blink();
 317 }
 318
 319 bool Entry::navigate(Navigation nav)
 320 {
 321         if(nav==NAV_LEFT || nav==NAV_RIGHT || ((nav==NAV_DOWN || nav==NAV_UP) && multiline))
 322                 move_edit_position(nav, false);
 323         else
 324                 return false;
 325
 326         return true;
 327 }
 328
 329 void Entry::animate(const Time::TimeDelta &)
 330 {
 331         cursor_blink = !cursor_blink;
 332         mark_rebuild();
 333 }
 334
 335 void Entry::on_size_change()
 336 {
 337         if(multiline)
 338                 check_view_range();
 339 }
 340
 341 void Entry::on_style_change()
 342 {
 343         text.set_style(style);
 344
 345         if(!style)
 346         {
 347                 text_part = nullptr;
 348                 return;
 349         }
 350
 351         text_part = style->find_part("text");
 352
 353         if(multiline)
 354                 check_view_range();
 355
 356         check_cursor_blink();
 357 }
 358
 359 void Entry::move_edit_position(Navigation nav, bool select)
 360 {
 361         if(nav==NAV_LEFT)
 362                 set_edit_position(text.move_offset(edit_pos, -1), select);
 363         else if(nav==NAV_RIGHT)
 364                 set_edit_position(text.move_offset(edit_pos, 1), select);
 365         else if(nav==NAV_DOWN)
 366         {
 367                 size_t row, col;
 368                 text.offset_to_coords(edit_pos, row, col);
 369                 set_edit_position(text.coords_to_offset(row+1, col), select);
 370         }
 371         else if(nav==NAV_UP)
 372         {
 373                 size_t row, col;
 374                 text.offset_to_coords(edit_pos, row, col);
 375                 set_edit_position((row>0 ? text.coords_to_offset(row-1, col) : 0), select);
 376         }
 377         else
 378                 throw invalid_argument("Entry::move_edit_position");
 379 }
 380
 381 void Entry::adjust_edit_position_for_change(size_t pos, ptrdiff_t change)
 382 {
 383         size_t old_edit_pos = edit_pos;
 384         size_t old_select_pos = selection_pos;
 385
 386         if(change>0)
 387         {
 388                 if(edit_pos>=pos)
 389                         edit_pos += change;
 390                 if(selection_active && selection_pos>=pos)
 391                         selection_pos += change;
 392         }
 393         else if(change<0)
 394         {
 395                 if(edit_pos>=pos)
 396                         edit_pos -= min<size_t>(edit_pos-pos, -change);
 397                 if(selection_active && selection_pos>=pos)
 398                         selection_pos -= min<size_t>(selection_pos-pos, -change);
 399         }
 400
 401         if(edit_pos!=old_edit_pos)
 402                 signal_edit_position_changed.emit(edit_pos);
 403         if(selection_active && (edit_pos!=old_edit_pos || selection_pos!=old_select_pos))
 404         {
 405                 size_t start, end;
 406                 if(get_selection(start, end))
 407                         signal_selection_changed.emit(start, end);
 408         }
 409 }
 410
 411 void Entry::set_edit_position(size_t ep, bool select)
 412 {
 413         bool selection_was_active = selection_active;
 414         if(select && !selection_active)
 415                 selection_pos = edit_pos;
 416         selection_active = select;
 417
 418         size_t old_edit_pos = edit_pos;
 419         edit_pos = min(ep, text.size());
 420
 421         if(edit_pos!=old_edit_pos)
 422         {
 423                 signal_edit_position_changed.emit(edit_pos);
 424                 size_t start, end;
 425                 if(get_selection(start, end))
 426                         signal_selection_changed.emit(start, end);
 427                 else if(selection_was_active)
 428                         signal_selection_changed.emit(edit_pos, edit_pos);
 429         }
 430
 431         if(multiline)
 432                 check_view_range();
 433         mark_rebuild();
 434 }
 435
 436 void Entry::erase_selection(bool emit_change)
 437 {
 438         size_t start, end;
 439         if(!get_selection(start, end))
 440                 return;
 441
 442         text.erase(start, end-start);
 443         if(emit_change)
 444                 signal_text_changed.emit(text.get());
 445         set_edit_position(start, false);
 446 }
 447
 448 void Entry::check_cursor_blink()
 449 {
 450         const Part *cursor_part = style->find_part("cursor");
 451         bool has_blink = (cursor_part && cursor_part->get_graphic(ACTIVE|FOCUS)!=cursor_part->get_graphic(NORMAL|FOCUS));
 452
 453         cursor_blink = (state&FOCUS);
 454         if((state&FOCUS) && style && has_blink)
 455         {
 456                 set_animation_interval(Time::sec/2);
 457                 mark_rebuild();
 458         }
 459         else
 460         {
 461                 if(has_blink)
 462                         mark_rebuild();
 463                 stop_animation();
 464         }
 465 }
 466
 467 void Entry::check_view_range()
 468 {
 469         if(!multiline || !text_part)
 470                 return;
 471
 472         visible_rows = text.get_visible_lines(*text_part, geom, nullptr);
 473
 474         size_t row, col;
 475         text.offset_to_coords(edit_pos, row, col);
 476
 477         size_t old_first_row = first_row;
 478         if(first_row>row)
 479                 first_row = row;
 480         else if(row>=first_row+visible_rows)
 481                 first_row = row+1-visible_rows;
 482
 483         size_t scroll = max<size_t>(text.get_n_lines(), visible_rows)-visible_rows;
 484         if(first_row>scroll)
 485                 first_row = scroll;
 486
 487         if(first_row!=old_first_row)
 488                 signal_scroll_position_changed.emit(first_row);
 489
 490         slider->set_range(0, scroll);
 491         slider->set_page_size(visible_rows);
 492         slider->set_value(scroll-first_row);
 493 }
 494
 495 void Entry::slider_value_changed(double value)
 496 {
 497         if(text.get_n_lines()>visible_rows)
 498         {
 499                 size_t old_first_row = first_row;
 500                 first_row = text.get_n_lines()-visible_rows-static_cast<size_t>(value);
 501                 if(first_row!=old_first_row)
 502                         signal_scroll_position_changed.emit(first_row);
 503                 mark_rebuild();
 504         }
 505 }
 506
 507
 508 Entry::Loader::Loader(Entry &e):
 509         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 510 {
 511         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 512         add("multiline", &Loader::multiline);
 513 }
 514
 515 void Entry::Loader::multiline(bool m)
 516 {
 517         obj.set_multiline(m);
 518 }
 519
 520 } // namespace GLtk
 521 } // namespace Msp