src/guiChatConsole.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "guiChatConsole.h"
  21 #include "chat.h"
  22 #include "client.h"
  23 #include "debug.h"
  24 #include "gettime.h"
  25 #include "keycode.h"
  26 #include "settings.h"
  27 #include "porting.h"
  28 #include "client/tile.h"
  29 #include "fontengine.h"
  30 #include "log.h"
  31 #include "gettext.h"
  32 #include <string>
  33
  34 #if USE_FREETYPE
  35         #include "xCGUITTFont.h"
  36 #endif
  37
  38 inline u32 clamp_u8(s32 value)
  39 {
  40         return (u32) MYMIN(MYMAX(value, 0), 255);
  41 }
  42
  43
  44 GUIChatConsole::GUIChatConsole(
  45                 gui::IGUIEnvironment* env,
  46                 gui::IGUIElement* parent,
  47                 s32 id,
  48                 ChatBackend* backend,
  49                 Client* client,
  50                 IMenuManager* menumgr
  51 ):
  52         IGUIElement(gui::EGUIET_ELEMENT, env, parent, id,
  53                         core::rect<s32>(0,0,100,100)),
  54         m_chat_backend(backend),
  55         m_client(client),
  56         m_menumgr(menumgr),
  57         m_screensize(v2u32(0,0)),
  58         m_animate_time_old(0),
  59         m_open(false),
  60         m_close_on_enter(false),
  61         m_height(0),
  62         m_desired_height(0),
  63         m_desired_height_fraction(0.0),
  64         m_height_speed(5.0),
  65         m_open_inhibited(0),
  66         m_cursor_blink(0.0),
  67         m_cursor_blink_speed(0.0),
  68         m_cursor_height(0.0),
  69         m_background(NULL),
  70         m_background_color(255, 0, 0, 0),
  71         m_font(NULL),
  72         m_fontsize(0, 0)
  73 {
  74         m_animate_time_old = getTimeMs();
  75
  76         // load background settings
  77         s32 console_alpha = g_settings->getS32("console_alpha");
  78         m_background_color.setAlpha(clamp_u8(console_alpha));
  79
  80         // load the background texture depending on settings
  81         ITextureSource *tsrc = client->getTextureSource();
  82         if (tsrc->isKnownSourceImage("background_chat.jpg")) {
  83                 m_background = tsrc->getTexture("background_chat.jpg");
  84                 m_background_color.setRed(255);
  85                 m_background_color.setGreen(255);
  86                 m_background_color.setBlue(255);
  87         } else {
  88                 v3f console_color = g_settings->getV3F("console_color");
  89                 m_background_color.setRed(clamp_u8(myround(console_color.X)));
  90                 m_background_color.setGreen(clamp_u8(myround(console_color.Y)));
  91                 m_background_color.setBlue(clamp_u8(myround(console_color.Z)));
  92         }
  93
  94         m_font = g_fontengine->getFont(FONT_SIZE_UNSPECIFIED, FM_Mono);
  95
  96         if (m_font == NULL)
  97         {
  98                 errorstream << "GUIChatConsole: Unable to load mono font ";
  99         }
 100         else
 101         {
 102                 core::dimension2d<u32> dim = m_font->getDimension(L"M");
 103                 m_fontsize = v2u32(dim.Width, dim.Height);
 104                 m_font->grab();
 105         }
 106         m_fontsize.X = MYMAX(m_fontsize.X, 1);
 107         m_fontsize.Y = MYMAX(m_fontsize.Y, 1);
 108
 109         // set default cursor options
 110         setCursor(true, true, 2.0, 0.1);
 111 }
 112
 113 GUIChatConsole::~GUIChatConsole()
 114 {
 115         if (m_font)
 116                 m_font->drop();
 117 }
 118
 119 void GUIChatConsole::openConsole(f32 height)
 120 {
 121         m_open = true;
 122         m_desired_height_fraction = height;
 123         m_desired_height = height * m_screensize.Y;
 124         reformatConsole();
 125         m_animate_time_old = getTimeMs();
 126         IGUIElement::setVisible(true);
 127         Environment->setFocus(this);
 128         m_menumgr->createdMenu(this);
 129 }
 130
 131 bool GUIChatConsole::isOpen() const
 132 {
 133         return m_open;
 134 }
 135
 136 bool GUIChatConsole::isOpenInhibited() const
 137 {
 138         return m_open_inhibited > 0;
 139 }
 140
 141 void GUIChatConsole::closeConsole()
 142 {
 143         m_open = false;
 144         Environment->removeFocus(this);
 145         m_menumgr->deletingMenu(this);
 146 }
 147
 148 void GUIChatConsole::closeConsoleAtOnce()
 149 {
 150         closeConsole();
 151         m_height = 0;
 152         recalculateConsolePosition();
 153 }
 154
 155 f32 GUIChatConsole::getDesiredHeight() const
 156 {
 157         return m_desired_height_fraction;
 158 }
 159
 160 void GUIChatConsole::replaceAndAddToHistory(std::wstring line)
 161 {
 162         ChatPrompt& prompt = m_chat_backend->getPrompt();
 163         prompt.addToHistory(prompt.getLine());
 164         prompt.replace(line);
 165 }
 166
 167
 168 void GUIChatConsole::setCursor(
 169         bool visible, bool blinking, f32 blink_speed, f32 relative_height)
 170 {
 171         if (visible)
 172         {
 173                 if (blinking)
 174                 {
 175                         // leave m_cursor_blink unchanged
 176                         m_cursor_blink_speed = blink_speed;
 177                 }
 178                 else
 179                 {
 180                         m_cursor_blink = 0x8000;  // on
 181                         m_cursor_blink_speed = 0.0;
 182                 }
 183         }
 184         else
 185         {
 186                 m_cursor_blink = 0;  // off
 187                 m_cursor_blink_speed = 0.0;
 188         }
 189         m_cursor_height = relative_height;
 190 }
 191
 192 void GUIChatConsole::draw()
 193 {
 194         if(!IsVisible)
 195                 return;
 196
 197         video::IVideoDriver* driver = Environment->getVideoDriver();
 198
 199         // Check screen size
 200         v2u32 screensize = driver->getScreenSize();
 201         if (screensize != m_screensize)
 202         {
 203                 // screen size has changed
 204                 // scale current console height to new window size
 205                 if (m_screensize.Y != 0)
 206                         m_height = m_height * screensize.Y / m_screensize.Y;
 207                 m_desired_height = m_desired_height_fraction * m_screensize.Y;
 208                 m_screensize = screensize;
 209                 reformatConsole();
 210         }
 211
 212         // Animation
 213         u32 now = getTimeMs();
 214         animate(now - m_animate_time_old);
 215         m_animate_time_old = now;
 216
 217         // Draw console elements if visible
 218         if (m_height > 0)
 219         {
 220                 drawBackground();
 221                 drawText();
 222                 drawPrompt();
 223         }
 224
 225         gui::IGUIElement::draw();
 226 }
 227
 228 void GUIChatConsole::reformatConsole()
 229 {
 230         s32 cols = m_screensize.X / m_fontsize.X - 2; // make room for a margin (looks better)
 231         s32 rows = m_desired_height / m_fontsize.Y - 1; // make room for the input prompt
 232         if (cols <= 0 || rows <= 0)
 233                 cols = rows = 0;
 234         m_chat_backend->reformat(cols, rows);
 235 }
 236
 237 void GUIChatConsole::recalculateConsolePosition()
 238 {
 239         core::rect<s32> rect(0, 0, m_screensize.X, m_height);
 240         DesiredRect = rect;
 241         recalculateAbsolutePosition(false);
 242 }
 243
 244 void GUIChatConsole::animate(u32 msec)
 245 {
 246         // animate the console height
 247         s32 goal = m_open ? m_desired_height : 0;
 248
 249         // Set invisible if close animation finished (reset by openConsole)
 250         // This function (animate()) is never called once its visibility becomes false so do not
 251         //              actually set visible to false before the inhibited period is over
 252         if (!m_open && m_height == 0 && m_open_inhibited == 0)
 253                 IGUIElement::setVisible(false);
 254
 255         if (m_height != goal)
 256         {
 257                 s32 max_change = msec * m_screensize.Y * (m_height_speed / 1000.0);
 258                 if (max_change == 0)
 259                         max_change = 1;
 260
 261                 if (m_height < goal)
 262                 {
 263                         // increase height
 264                         if (m_height + max_change < goal)
 265                                 m_height += max_change;
 266                         else
 267                                 m_height = goal;
 268                 }
 269                 else
 270                 {
 271                         // decrease height
 272                         if (m_height > goal + max_change)
 273                                 m_height -= max_change;
 274                         else
 275                                 m_height = goal;
 276                 }
 277
 278                 recalculateConsolePosition();
 279         }
 280
 281         // blink the cursor
 282         if (m_cursor_blink_speed != 0.0)
 283         {
 284                 u32 blink_increase = 0x10000 * msec * (m_cursor_blink_speed / 1000.0);
 285                 if (blink_increase == 0)
 286                         blink_increase = 1;
 287                 m_cursor_blink = ((m_cursor_blink + blink_increase) & 0xffff);
 288         }
 289
 290         // decrease open inhibit counter
 291         if (m_open_inhibited > msec)
 292                 m_open_inhibited -= msec;
 293         else
 294                 m_open_inhibited = 0;
 295 }
 296
 297 void GUIChatConsole::drawBackground()
 298 {
 299         video::IVideoDriver* driver = Environment->getVideoDriver();
 300         if (m_background != NULL)
 301         {
 302                 core::rect<s32> sourcerect(0, -m_height, m_screensize.X, 0);
 303                 driver->draw2DImage(
 304                         m_background,
 305                         v2s32(0, 0),
 306                         sourcerect,
 307                         &AbsoluteClippingRect,
 308                         m_background_color,
 309                         false);
 310         }
 311         else
 312         {
 313                 driver->draw2DRectangle(
 314                         m_background_color,
 315                         core::rect<s32>(0, 0, m_screensize.X, m_height),
 316                         &AbsoluteClippingRect);
 317         }
 318 }
 319
 320 void GUIChatConsole::drawText()
 321 {
 322         if (m_font == NULL)
 323                 return;
 324
 325         ChatBuffer& buf = m_chat_backend->getConsoleBuffer();
 326         for (u32 row = 0; row < buf.getRows(); ++row)
 327         {
 328                 const ChatFormattedLine& line = buf.getFormattedLine(row);
 329                 if (line.fragments.empty())
 330                         continue;
 331
 332                 s32 line_height = m_fontsize.Y;
 333                 s32 y = row * line_height + m_height - m_desired_height;
 334                 if (y + line_height < 0)
 335                         continue;
 336
 337                 for (u32 i = 0; i < line.fragments.size(); ++i)
 338                 {
 339                         const ChatFormattedFragment& fragment = line.fragments[i];
 340                         s32 x = (fragment.column + 1) * m_fontsize.X;
 341                         core::rect<s32> destrect(
 342                                 x, y, x + m_fontsize.X * fragment.text.size(), y + m_fontsize.Y);
 343
 344
 345                         #if USE_FREETYPE
 346                         // Draw colored text if FreeType is enabled
 347                                 irr::gui::CGUITTFont *tmp = static_cast<irr::gui::CGUITTFont*>(m_font);
 348                                 tmp->draw(
 349                                         fragment.text,
 350                                         destrect,
 351                                         video::SColor(255, 255, 255, 255),
 352                                         false,
 353                                         false,
 354                                         &AbsoluteClippingRect);
 355                         #else
 356                         // Otherwise use standard text
 357                                 m_font->draw(
 358                                         fragment.text.c_str(),
 359                                         destrect,
 360                                         video::SColor(255, 255, 255, 255),
 361                                         false,
 362                                         false,
 363                                         &AbsoluteClippingRect);
 364                         #endif
 365                 }
 366         }
 367 }
 368
 369 void GUIChatConsole::drawPrompt()
 370 {
 371         if (m_font == NULL)
 372                 return;
 373
 374         u32 row = m_chat_backend->getConsoleBuffer().getRows();
 375         s32 line_height = m_fontsize.Y;
 376         s32 y = row * line_height + m_height - m_desired_height;
 377
 378         ChatPrompt& prompt = m_chat_backend->getPrompt();
 379         std::wstring prompt_text = prompt.getVisiblePortion();
 380
 381         // FIXME Draw string at once, not character by character
 382         // That will only work with the cursor once we have a monospace font
 383         for (u32 i = 0; i < prompt_text.size(); ++i)
 384         {
 385                 wchar_t ws[2] = {prompt_text[i], 0};
 386                 s32 x = (1 + i) * m_fontsize.X;
 387                 core::rect<s32> destrect(
 388                         x, y, x + m_fontsize.X, y + m_fontsize.Y);
 389                 m_font->draw(
 390                         ws,
 391                         destrect,
 392                         video::SColor(255, 255, 255, 255),
 393                         false,
 394                         false,
 395                         &AbsoluteClippingRect);
 396         }
 397
 398         // Draw the cursor during on periods
 399         if ((m_cursor_blink & 0x8000) != 0)
 400         {
 401                 s32 cursor_pos = prompt.getVisibleCursorPosition();
 402                 if (cursor_pos >= 0)
 403                 {
 404                         s32 cursor_len = prompt.getCursorLength();
 405                         video::IVideoDriver* driver = Environment->getVideoDriver();
 406                         s32 x = (1 + cursor_pos) * m_fontsize.X;
 407                         core::rect<s32> destrect(
 408                                 x,
 409                                 y + m_fontsize.Y * (1.0 - m_cursor_height),
 410                                 x + m_fontsize.X * MYMAX(cursor_len, 1),
 411                                 y + m_fontsize.Y * (cursor_len ? m_cursor_height+1 : 1)
 412                         );
 413                         video::SColor cursor_color(255,255,255,255);
 414                         driver->draw2DRectangle(
 415                                 cursor_color,
 416                                 destrect,
 417                                 &AbsoluteClippingRect);
 418                 }
 419         }
 420
 421 }
 422
 423 bool GUIChatConsole::OnEvent(const SEvent& event)
 424 {
 425
 426         ChatPrompt &prompt = m_chat_backend->getPrompt();
 427
 428         if(event.EventType == EET_KEY_INPUT_EVENT && event.KeyInput.PressedDown)
 429         {
 430                 // Key input
 431                 if(KeyPress(event.KeyInput) == getKeySetting("keymap_console"))
 432                 {
 433                         closeConsole();
 434
 435                         // inhibit open so the_game doesn't reopen immediately
 436                         m_open_inhibited = 50;
 437                         m_close_on_enter = false;
 438                         return true;
 439                 }
 440                 else if(event.KeyInput.Key == KEY_ESCAPE)
 441                 {
 442                         closeConsoleAtOnce();
 443                         m_close_on_enter = false;
 444                         // inhibit open so the_game doesn't reopen immediately
 445                         m_open_inhibited = 1; // so the ESCAPE button doesn't open the "pause menu"
 446                         return true;
 447                 }
 448                 else if(event.KeyInput.Key == KEY_PRIOR)
 449                 {
 450                         m_chat_backend->scrollPageUp();
 451                         return true;
 452                 }
 453                 else if(event.KeyInput.Key == KEY_NEXT)
 454                 {
 455                         m_chat_backend->scrollPageDown();
 456                         return true;
 457                 }
 458                 else if(event.KeyInput.Key == KEY_RETURN)
 459                 {
 460                         prompt.addToHistory(prompt.getLine());
 461                         std::wstring text = prompt.replace(L"");
 462                         m_client->typeChatMessage(text);
 463                         if (m_close_on_enter) {
 464                                 closeConsoleAtOnce();
 465                                 m_close_on_enter = false;
 466                         }
 467                         return true;
 468                 }
 469                 else if(event.KeyInput.Key == KEY_UP)
 470                 {
 471                         // Up pressed
 472                         // Move back in history
 473                         prompt.historyPrev();
 474                         return true;
 475                 }
 476                 else if(event.KeyInput.Key == KEY_DOWN)
 477                 {
 478                         // Down pressed
 479                         // Move forward in history
 480                         prompt.historyNext();
 481                         return true;
 482                 }
 483                 else if(event.KeyInput.Key == KEY_LEFT || event.KeyInput.Key == KEY_RIGHT)
 484                 {
 485                         // Left/right pressed
 486                         // Move/select character/word to the left depending on control and shift keys
 487                         ChatPrompt::CursorOp op = event.KeyInput.Shift ?
 488                                 ChatPrompt::CURSOROP_SELECT :
 489                                 ChatPrompt::CURSOROP_MOVE;
 490                         ChatPrompt::CursorOpDir dir = event.KeyInput.Key == KEY_LEFT ?
 491                                 ChatPrompt::CURSOROP_DIR_LEFT :
 492                                 ChatPrompt::CURSOROP_DIR_RIGHT;
 493                         ChatPrompt::CursorOpScope scope = event.KeyInput.Control ?
 494                                 ChatPrompt::CURSOROP_SCOPE_WORD :
 495                                 ChatPrompt::CURSOROP_SCOPE_CHARACTER;
 496                         prompt.cursorOperation(op, dir, scope);
 497                         return true;
 498                 }
 499                 else if(event.KeyInput.Key == KEY_HOME)
 500                 {
 501                         // Home pressed
 502                         // move to beginning of line
 503                         prompt.cursorOperation(
 504                                 ChatPrompt::CURSOROP_MOVE,
 505                                 ChatPrompt::CURSOROP_DIR_LEFT,
 506                                 ChatPrompt::CURSOROP_SCOPE_LINE);
 507                         return true;
 508                 }
 509                 else if(event.KeyInput.Key == KEY_END)
 510                 {
 511                         // End pressed
 512                         // move to end of line
 513                         prompt.cursorOperation(
 514                                 ChatPrompt::CURSOROP_MOVE,
 515                                 ChatPrompt::CURSOROP_DIR_RIGHT,
 516                                 ChatPrompt::CURSOROP_SCOPE_LINE);
 517                         return true;
 518                 }
 519                 else if(event.KeyInput.Key == KEY_BACK)
 520                 {
 521                         // Backspace or Ctrl-Backspace pressed
 522                         // delete character / word to the left
 523                         ChatPrompt::CursorOpScope scope =
 524                                 event.KeyInput.Control ?
 525                                 ChatPrompt::CURSOROP_SCOPE_WORD :
 526                                 ChatPrompt::CURSOROP_SCOPE_CHARACTER;
 527                         prompt.cursorOperation(
 528                                 ChatPrompt::CURSOROP_DELETE,
 529                                 ChatPrompt::CURSOROP_DIR_LEFT,
 530                                 scope);
 531                         return true;
 532                 }
 533                 else if(event.KeyInput.Key == KEY_DELETE)
 534                 {
 535                         // Delete or Ctrl-Delete pressed
 536                         // delete character / word to the right
 537                         ChatPrompt::CursorOpScope scope =
 538                                 event.KeyInput.Control ?
 539                                 ChatPrompt::CURSOROP_SCOPE_WORD :
 540                                 ChatPrompt::CURSOROP_SCOPE_CHARACTER;
 541                         prompt.cursorOperation(
 542                                 ChatPrompt::CURSOROP_DELETE,
 543                                 ChatPrompt::CURSOROP_DIR_RIGHT,
 544                                 scope);
 545                         return true;
 546                 }
 547                 else if(event.KeyInput.Key == KEY_KEY_A && event.KeyInput.Control)
 548                 {
 549                         // Ctrl-A pressed
 550                         // Select all text
 551                         prompt.cursorOperation(
 552                                 ChatPrompt::CURSOROP_SELECT,
 553                                 ChatPrompt::CURSOROP_DIR_LEFT, // Ignored
 554                                 ChatPrompt::CURSOROP_SCOPE_LINE);
 555                         return true;
 556                 }
 557                 else if(event.KeyInput.Key == KEY_KEY_C && event.KeyInput.Control)
 558                 {
 559                         // Ctrl-C pressed
 560                         // Copy text to clipboard
 561                         if (prompt.getCursorLength() <= 0)
 562                                 return true;
 563                         std::wstring wselected = prompt.getSelection();
 564                         std::string selected(wselected.begin(), wselected.end());
 565                         Environment->getOSOperator()->copyToClipboard(selected.c_str());
 566                         return true;
 567                 }
 568                 else if(event.KeyInput.Key == KEY_KEY_V && event.KeyInput.Control)
 569                 {
 570                         // Ctrl-V pressed
 571                         // paste text from clipboard
 572                         if (prompt.getCursorLength() > 0) {
 573                                 // Delete selected section of text
 574                                 prompt.cursorOperation(
 575                                         ChatPrompt::CURSOROP_DELETE,
 576                                         ChatPrompt::CURSOROP_DIR_LEFT, // Ignored
 577                                         ChatPrompt::CURSOROP_SCOPE_SELECTION);
 578                         }
 579                         IOSOperator *os_operator = Environment->getOSOperator();
 580                         const c8 *text = os_operator->getTextFromClipboard();
 581                         if (!text)
 582                                 return true;
 583                         std::basic_string<unsigned char> str((const unsigned char*)text);
 584                         prompt.input(std::wstring(str.begin(), str.end()));
 585                         return true;
 586                 }
 587                 else if(event.KeyInput.Key == KEY_KEY_X && event.KeyInput.Control)
 588                 {
 589                         // Ctrl-X pressed
 590                         // Cut text to clipboard
 591                         if (prompt.getCursorLength() <= 0)
 592                                 return true;
 593                         std::wstring wselected = prompt.getSelection();
 594                         std::string selected(wselected.begin(), wselected.end());
 595                         Environment->getOSOperator()->copyToClipboard(selected.c_str());
 596                         prompt.cursorOperation(
 597                                 ChatPrompt::CURSOROP_DELETE,
 598                                 ChatPrompt::CURSOROP_DIR_LEFT, // Ignored
 599                                 ChatPrompt::CURSOROP_SCOPE_SELECTION);
 600                         return true;
 601                 }
 602                 else if(event.KeyInput.Key == KEY_KEY_U && event.KeyInput.Control)
 603                 {
 604                         // Ctrl-U pressed
 605                         // kill line to left end
 606                         prompt.cursorOperation(
 607                                 ChatPrompt::CURSOROP_DELETE,
 608                                 ChatPrompt::CURSOROP_DIR_LEFT,
 609                                 ChatPrompt::CURSOROP_SCOPE_LINE);
 610                         return true;
 611                 }
 612                 else if(event.KeyInput.Key == KEY_KEY_K && event.KeyInput.Control)
 613                 {
 614                         // Ctrl-K pressed
 615                         // kill line to right end
 616                         prompt.cursorOperation(
 617                                 ChatPrompt::CURSOROP_DELETE,
 618                                 ChatPrompt::CURSOROP_DIR_RIGHT,
 619                                 ChatPrompt::CURSOROP_SCOPE_LINE);
 620                         return true;
 621                 }
 622                 else if(event.KeyInput.Key == KEY_TAB)
 623                 {
 624                         // Tab or Shift-Tab pressed
 625                         // Nick completion
 626                         std::list<std::string> names = m_client->getConnectedPlayerNames();
 627                         bool backwards = event.KeyInput.Shift;
 628                         prompt.nickCompletion(names, backwards);
 629                         return true;
 630                 }
 631                 else if(event.KeyInput.Char != 0 && !event.KeyInput.Control)
 632                 {
 633                         #if defined(__linux__) && (IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR < 9)
 634                                 wchar_t wc = L'_';
 635                                 mbtowc( &wc, (char *) &event.KeyInput.Char, sizeof(event.KeyInput.Char) );
 636                                 prompt.input(wc);
 637                         #else
 638                                 prompt.input(event.KeyInput.Char);
 639                         #endif
 640                         return true;
 641                 }
 642         }
 643         else if(event.EventType == EET_MOUSE_INPUT_EVENT)
 644         {
 645                 if(event.MouseInput.Event == EMIE_MOUSE_WHEEL)
 646                 {
 647                         s32 rows = myround(-3.0 * event.MouseInput.Wheel);
 648                         m_chat_backend->scroll(rows);
 649                 }
 650         }
 651
 652         return Parent ? Parent->OnEvent(event) : false;
 653 }
 654
 655 void GUIChatConsole::setVisible(bool visible)
 656 {
 657         m_open = visible;
 658         IGUIElement::setVisible(visible);
 659         if (!visible) {
 660                 m_height = 0;
 661                 recalculateConsolePosition();
 662         }
 663 }
 664