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                         slider = new VSlider;
 122                         add(*slider);
 123                         slider->set_step(1);
 124                         slider->signal_value_changed.connect(sigc::mem_fun(this, &Entry::slider_value_changed));
 125                         mark_rebuild();
 126                 }
 127                 check_view_range();
 128         }
 129 }
 130
 131 void Entry::rebuild_special(const Part &part)
 132 {
 133         if(part.get_name()=="text")
 134                 text.build(part, state, geom, first_row, part_cache);
 135         else if(part.get_name()=="cursor")
 136         {
 137                 State cursor_state = (cursor_blink ? ACTIVE : NORMAL);
 138                 const Graphic *graphic = part.get_graphic(state|cursor_state);
 139                 if(!text_part || !graphic || !graphic->get_texture())
 140                         return;
 141
 142                 size_t row, col;
 143                 text.offset_to_coords(edit_pos, row, col);
 144
 145                 if(row<first_row || row>=first_row+visible_rows)
 146                         return;
 147
 148                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 149
 150                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 151                 bld.transform(GL::Matrix::translation(rgeom.x, rgeom.y, 0));
 152                 graphic->build(part.get_geometry().w, part.get_geometry().h, bld);
 153         }
 154         else if(part.get_name()=="selection")
 155         {
 156                 if(!selection_active)
 157                         return;
 158
 159                 const Graphic *graphic = part.get_graphic(state);
 160                 if(!text_part || !graphic || !graphic->get_texture())
 161                         return;
 162
 163                 size_t start, end;
 164                 get_selection(start, end);
 165
 166                 size_t row, col;
 167                 text.offset_to_coords(start, row, col);
 168                 size_t end_row, end_col;
 169                 text.offset_to_coords(end, end_row, end_col);
 170
 171                 if(end_row<first_row || row>=first_row+visible_rows)
 172                         return;
 173
 174                 if(row<first_row)
 175                 {
 176                         row = first_row;
 177                         col = 0;
 178                 }
 179
 180                 if(end_row>=first_row+visible_rows)
 181                 {
 182                         end_row = first_row+visible_rows-1;
 183                         end_col = text.get_line_length(end_row);
 184                 }
 185
 186                 while(row<=end_row)
 187                 {
 188                         size_t ec = (row==end_row ? end_col : text.get_line_length(row));
 189                         if(ec>col)
 190                         {
 191                                 Geometry rgeom = text.coords_to_geometry(*text_part, geom, first_row, row, col);
 192                                 Geometry egeom = text.coords_to_geometry(*text_part, geom, first_row, row, ec);
 193
 194                                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
 195                                 bld.transform(GL::Matrix::translation(rgeom.x, rgeom.y, 0));
 196                                 graphic->build(egeom.x-rgeom.x, part.get_geometry().h, bld);
 197                         }
 198
 199                         ++row;
 200                         col = 0;
 201                 }
 202         }
 203         else if(part.get_name()=="slider")
 204         {
 205                 if(multiline)
 206                 {
 207                         reposition_child(*slider, part);
 208                         Widget::rebuild_special(part);
 209                 }
 210         }
 211         else
 212                 Widget::rebuild_special(part);
 213 }
 214
 215 void Entry::render_special(const Part &part, GL::Renderer &renderer) const
 216 {
 217         if(part.get_name()=="slider" && multiline)
 218                 slider->render(renderer);
 219 }
 220
 221 void Entry::touch_press(int x, int y, unsigned finger)
 222 {
 223         if(finger==0)
 224                 set_focus();
 225         Widget::touch_press(x, y, finger);
 226 }
 227
 228 bool Entry::key_press(unsigned key, unsigned mod)
 229 {
 230         got_key_press = true;
 231         if(key==Input::KEY_BACKSPACE)
 232         {
 233                 if(selection_active)
 234                         erase_selection(true);
 235                 else if(edit_pos>0)
 236                 {
 237                         size_t start_pos = text.move_offset(edit_pos, -1);
 238                         erase(start_pos, edit_pos-start_pos);
 239                 }
 240         }
 241         else if(key==Input::KEY_DELETE)
 242         {
 243                 if(selection_active)
 244                         erase_selection(true);
 245                 else
 246                 {
 247                         size_t end_pos = text.move_offset(edit_pos, 1);
 248                         erase(edit_pos, end_pos-edit_pos);
 249                 }
 250         }
 251         else if(key==Input::KEY_ENTER && multiline)
 252                 insert(edit_pos, "\n");
 253         else if(key==Input::KEY_END)
 254         {
 255                 size_t row, col;
 256                 text.offset_to_coords(edit_pos, row, col);
 257                 set_edit_position(text.coords_to_offset(row, text.get_line_length(row)), mod==MOD_SHIFT);
 258         }
 259         else if(key==Input::KEY_HOME)
 260         {
 261                 size_t row, col;
 262                 text.offset_to_coords(edit_pos, row, col);
 263                 set_edit_position(text.coords_to_offset(row, 0), mod==MOD_SHIFT);
 264         }
 265         else if(key==Input::KEY_PGUP)
 266         {
 267                 size_t row, col;
 268                 text.offset_to_coords(edit_pos, row, col);
 269                 set_edit_position(text.coords_to_offset((row<visible_rows ? 0 : row-visible_rows), col), mod==MOD_SHIFT);
 270         }
 271         else if(key==Input::KEY_PGDN)
 272         {
 273                 size_t row, col;
 274                 text.offset_to_coords(edit_pos, row, col);
 275                 set_edit_position(text.coords_to_offset(row+visible_rows, col), mod==MOD_SHIFT);
 276         }
 277         else if(key==Input::KEY_LEFT && mod==MOD_SHIFT)
 278                 move_edit_position(NAV_LEFT, true);
 279         else if(key==Input::KEY_RIGHT && mod==MOD_SHIFT)
 280                 move_edit_position(NAV_RIGHT, true);
 281         else if(key==Input::KEY_UP && mod==MOD_SHIFT && multiline)
 282                 move_edit_position(NAV_UP, true);
 283         else if(key==Input::KEY_DOWN && mod==MOD_SHIFT && multiline)
 284                 move_edit_position(NAV_DOWN, true);
 285         else
 286                 return false;
 287
 288         return true;
 289 }
 290
 291 bool Entry::character(wchar_t ch)
 292 {
 293         if(got_key_press && ch>=' ' && ch!=0x7F)
 294         {
 295                 if(selection_active)
 296                         erase_selection(false);
 297                 insert(edit_pos, StringCodec::encode<StringCodec::Utf8>(StringCodec::ustring(1, ch)));
 298                 return true;
 299         }
 300
 301         return false;
 302 }
 303
 304 void Entry::focus_in()
 305 {
 306         cursor_blink = true;
 307         Widget::focus_in();
 308         check_cursor_blink();
 309 }
 310
 311 void Entry::focus_out()
 312 {
 313         Widget::focus_out();
 314         got_key_press = false;
 315         check_cursor_blink();
 316 }
 317
 318 bool Entry::navigate(Navigation nav)
 319 {
 320         if(nav==NAV_LEFT || nav==NAV_RIGHT || ((nav==NAV_DOWN || nav==NAV_UP) && multiline))
 321                 move_edit_position(nav, false);
 322         else
 323                 return false;
 324
 325         return true;
 326 }
 327
 328 void Entry::animate(const Time::TimeDelta &)
 329 {
 330         cursor_blink = !cursor_blink;
 331         mark_rebuild();
 332 }
 333
 334 void Entry::on_size_change()
 335 {
 336         if(multiline)
 337                 check_view_range();
 338 }
 339
 340 void Entry::on_style_change()
 341 {
 342         text.set_style(style);
 343
 344         if(!style)
 345         {
 346                 text_part = nullptr;
 347                 return;
 348         }
 349
 350         text_part = style->find_part("text");
 351
 352         if(multiline)
 353                 check_view_range();
 354
 355         check_cursor_blink();
 356 }
 357
 358 void Entry::move_edit_position(Navigation nav, bool select)
 359 {
 360         if(nav==NAV_LEFT)
 361                 set_edit_position(text.move_offset(edit_pos, -1), select);
 362         else if(nav==NAV_RIGHT)
 363                 set_edit_position(text.move_offset(edit_pos, 1), select);
 364         else if(nav==NAV_DOWN)
 365         {
 366                 size_t row, col;
 367                 text.offset_to_coords(edit_pos, row, col);
 368                 set_edit_position(text.coords_to_offset(row+1, col), select);
 369         }
 370         else if(nav==NAV_UP)
 371         {
 372                 size_t row, col;
 373                 text.offset_to_coords(edit_pos, row, col);
 374                 set_edit_position((row>0 ? text.coords_to_offset(row-1, col) : 0), select);
 375         }
 376         else
 377                 throw invalid_argument("Entry::move_edit_position");
 378 }
 379
 380 void Entry::adjust_edit_position_for_change(size_t pos, ptrdiff_t change)
 381 {
 382         size_t old_edit_pos = edit_pos;
 383         size_t old_select_pos = selection_pos;
 384
 385         if(change>0)
 386         {
 387                 if(edit_pos>=pos)
 388                         edit_pos += change;
 389                 if(selection_active && selection_pos>=pos)
 390                         selection_pos += change;
 391         }
 392         else if(change<0)
 393         {
 394                 if(edit_pos>=pos)
 395                         edit_pos -= min<size_t>(edit_pos-pos, -change);
 396                 if(selection_active && selection_pos>=pos)
 397                         selection_pos -= min<size_t>(selection_pos-pos, -change);
 398         }
 399
 400         if(edit_pos!=old_edit_pos)
 401                 signal_edit_position_changed.emit(edit_pos);
 402         if(selection_active && (edit_pos!=old_edit_pos || selection_pos!=old_select_pos))
 403         {
 404                 size_t start, end;
 405                 if(get_selection(start, end))
 406                         signal_selection_changed.emit(start, end);
 407         }
 408 }
 409
 410 void Entry::set_edit_position(size_t ep, bool select)
 411 {
 412         bool selection_was_active = selection_active;
 413         if(select && !selection_active)
 414                 selection_pos = edit_pos;
 415         selection_active = select;
 416
 417         size_t old_edit_pos = edit_pos;
 418         edit_pos = min(ep, text.size());
 419
 420         if(edit_pos!=old_edit_pos)
 421         {
 422                 signal_edit_position_changed.emit(edit_pos);
 423                 size_t start, end;
 424                 if(get_selection(start, end))
 425                         signal_selection_changed.emit(start, end);
 426                 else if(selection_was_active)
 427                         signal_selection_changed.emit(edit_pos, edit_pos);
 428         }
 429
 430         if(multiline)
 431                 check_view_range();
 432         mark_rebuild();
 433 }
 434
 435 void Entry::erase_selection(bool emit_change)
 436 {
 437         size_t start, end;
 438         if(!get_selection(start, end))
 439                 return;
 440
 441         text.erase(start, end-start);
 442         if(emit_change)
 443                 signal_text_changed.emit(text.get());
 444         set_edit_position(start, false);
 445 }
 446
 447 void Entry::check_cursor_blink()
 448 {
 449         const Part *cursor_part = style->find_part("cursor");
 450         bool has_blink = (cursor_part && cursor_part->get_graphic(ACTIVE|FOCUS)!=cursor_part->get_graphic(NORMAL|FOCUS));
 451
 452         cursor_blink = (state&FOCUS);
 453         if((state&FOCUS) && style && has_blink)
 454         {
 455                 set_animation_interval(Time::sec/2);
 456                 mark_rebuild();
 457         }
 458         else
 459         {
 460                 if(has_blink)
 461                         mark_rebuild();
 462                 stop_animation();
 463         }
 464 }
 465
 466 void Entry::check_view_range()
 467 {
 468         if(!multiline || !text_part)
 469                 return;
 470
 471         visible_rows = text.get_visible_lines(*text_part, geom, nullptr);
 472
 473         size_t row, col;
 474         text.offset_to_coords(edit_pos, row, col);
 475
 476         size_t old_first_row = first_row;
 477         if(first_row>row)
 478                 first_row = row;
 479         else if(row>=first_row+visible_rows)
 480                 first_row = row+1-visible_rows;
 481
 482         size_t scroll = max<size_t>(text.get_n_lines(), visible_rows)-visible_rows;
 483         if(first_row>scroll)
 484                 first_row = scroll;
 485
 486         if(first_row!=old_first_row)
 487                 signal_scroll_position_changed.emit(first_row);
 488
 489         slider->set_range(0, scroll);
 490         slider->set_page_size(visible_rows);
 491         slider->set_value(scroll-first_row);
 492 }
 493
 494 void Entry::slider_value_changed(double value)
 495 {
 496         if(text.get_n_lines()>visible_rows)
 497         {
 498                 size_t old_first_row = first_row;
 499                 first_row = text.get_n_lines()-visible_rows-static_cast<size_t>(value);
 500                 if(first_row!=old_first_row)
 501                         signal_scroll_position_changed.emit(first_row);
 502                 mark_rebuild();
 503         }
 504 }
 505
 506
 507 Entry::Loader::Loader(Entry &e):
 508         DataFile::DerivedObjectLoader<Entry, Widget::Loader>(e)
 509 {
 510         add("edit_size", &Entry::edit_width, &Entry::edit_height);
 511         add("multiline", &Loader::multiline);
 512 }
 513
 514 void Entry::Loader::multiline(bool m)
 515 {
 516         obj.set_multiline(m);
 517 }
 518
 519 } // namespace GLtk
 520 } // namespace Msp