src/error_gui.cpp

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file error_gui.cpp GUI related to errors. */
  11
  12 #include "stdafx.h"
  13 #include "landscape.h"
  14 #include "newgrf_text.h"
  15 #include "error.h"
  16 #include "viewport_func.h"
  17 #include "gfx_func.h"
  18 #include "string_func.h"
  19 #include "company_base.h"
  20 #include "company_manager_face.h"
  21 #include "strings_func.h"
  22 #include "zoom_func.h"
  23 #include "window_func.h"
  24 #include "console_func.h"
  25 #include "window_gui.h"
  26
  27 #include "widgets/error_widget.h"
  28
  29 #include "table/strings.h"
  30 #include <list>
  31
  32 #include "safeguards.h"
  33
  34 static const NWidgetPart _nested_errmsg_widgets[] = {
  35         NWidget(NWID_HORIZONTAL),
  36                 NWidget(WWT_CLOSEBOX, COLOUR_RED),
  37                 NWidget(WWT_CAPTION, COLOUR_RED, WID_EM_CAPTION), SetDataTip(STR_ERROR_MESSAGE_CAPTION, STR_NULL),
  38         EndContainer(),
  39         NWidget(WWT_PANEL, COLOUR_RED),
  40                 NWidget(WWT_EMPTY, COLOUR_RED, WID_EM_MESSAGE), SetPadding(0, 2, 0, 2), SetMinimalSize(236, 32),
  41         EndContainer(),
  42 };
  43
  44 static WindowDesc _errmsg_desc(
  45         WDP_MANUAL, "error", 0, 0,
  46         WC_ERRMSG, WC_NONE,
  47         0,
  48         _nested_errmsg_widgets, lengthof(_nested_errmsg_widgets)
  49 );
  50
  51 static const NWidgetPart _nested_errmsg_face_widgets[] = {
  52         NWidget(NWID_HORIZONTAL),
  53                 NWidget(WWT_CLOSEBOX, COLOUR_RED),
  54                 NWidget(WWT_CAPTION, COLOUR_RED, WID_EM_CAPTION), SetDataTip(STR_ERROR_MESSAGE_CAPTION_OTHER_COMPANY, STR_NULL),
  55         EndContainer(),
  56         NWidget(WWT_PANEL, COLOUR_RED),
  57                 NWidget(NWID_HORIZONTAL), SetPIP(2, 1, 2),
  58                         NWidget(WWT_EMPTY, COLOUR_RED, WID_EM_FACE), SetMinimalSize(92, 119), SetFill(0, 1), SetPadding(2, 0, 1, 0),
  59                         NWidget(WWT_EMPTY, COLOUR_RED, WID_EM_MESSAGE), SetFill(0, 1), SetMinimalSize(238, 123),
  60                 EndContainer(),
  61         EndContainer(),
  62 };
  63
  64 static WindowDesc _errmsg_face_desc(
  65         WDP_MANUAL, "error_face", 0, 0,
  66         WC_ERRMSG, WC_NONE,
  67         0,
  68         _nested_errmsg_face_widgets, lengthof(_nested_errmsg_face_widgets)
  69 );
  70
  71 /**
  72  * Copy the given data into our instance.
  73  * @param data The data to copy.
  74  */
  75 ErrorMessageData::ErrorMessageData(const ErrorMessageData &data)
  76 {
  77         *this = data;
  78         for (size_t i = 0; i < lengthof(this->strings); i++) {
  79                 if (this->strings[i] != NULL) {
  80                         this->strings[i] = stredup(this->strings[i]);
  81                         this->decode_params[i] = (size_t)this->strings[i];
  82                 }
  83         }
  84 }
  85
  86 /** Free all the strings. */
  87 ErrorMessageData::~ErrorMessageData()
  88 {
  89         for (size_t i = 0; i < lengthof(this->strings); i++) free(this->strings[i]);
  90 }
  91
  92 /**
  93  * Display an error message in a window.
  94  * @param summary_msg  General error message showed in first line. Must be valid.
  95  * @param detailed_msg Detailed error message showed in second line. Can be INVALID_STRING_ID.
  96  * @param duration     The amount of time to show this error message.
  97  * @param x            World X position (TileVirtX) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
  98  * @param y            World Y position (TileVirtY) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
  99  * @param textref_stack_grffile NewGRF that provides the #TextRefStack for the error message.
 100  * @param textref_stack_size Number of uint32 values to put on the #TextRefStack for the error message; 0 if the #TextRefStack shall not be used.
 101  * @param textref_stack Values to put on the #TextRefStack.
 102  */
 103 ErrorMessageData::ErrorMessageData(StringID summary_msg, StringID detailed_msg, uint duration, int x, int y, const GRFFile *textref_stack_grffile, uint textref_stack_size, const uint32 *textref_stack) :
 104         duration(duration),
 105         textref_stack_grffile(textref_stack_grffile),
 106         textref_stack_size(textref_stack_size),
 107         summary_msg(summary_msg),
 108         detailed_msg(detailed_msg),
 109         face(INVALID_COMPANY)
 110 {
 111         this->position.x = x;
 112         this->position.y = y;
 113
 114         memset(this->decode_params, 0, sizeof(this->decode_params));
 115         memset(this->strings, 0, sizeof(this->strings));
 116
 117         if (textref_stack_size > 0) MemCpyT(this->textref_stack, textref_stack, textref_stack_size);
 118
 119         assert(summary_msg != INVALID_STRING_ID);
 120 }
 121
 122 /**
 123  * Copy error parameters from current DParams.
 124  */
 125 void ErrorMessageData::CopyOutDParams()
 126 {
 127         /* Reset parameters */
 128         for (size_t i = 0; i < lengthof(this->strings); i++) free(this->strings[i]);
 129         memset(this->decode_params, 0, sizeof(this->decode_params));
 130         memset(this->strings, 0, sizeof(this->strings));
 131
 132         /* Get parameters using type information */
 133         if (this->textref_stack_size > 0) StartTextRefStackUsage(this->textref_stack_grffile, this->textref_stack_size, this->textref_stack);
 134         CopyOutDParam(this->decode_params, this->strings, this->detailed_msg == INVALID_STRING_ID ? this->summary_msg : this->detailed_msg, lengthof(this->decode_params));
 135         if (this->textref_stack_size > 0) StopTextRefStackUsage();
 136
 137         if (this->detailed_msg == STR_ERROR_OWNED_BY) {
 138                 CompanyID company = (CompanyID)GetDParamX(this->decode_params, 2);
 139                 if (company < MAX_COMPANIES) face = company;
 140         }
 141 }
 142
 143 /**
 144  * Set a error string parameter.
 145  * @param n Parameter index
 146  * @param v Parameter value
 147  */
 148 void ErrorMessageData::SetDParam(uint n, uint64 v)
 149 {
 150         this->decode_params[n] = v;
 151 }
 152
 153 /**
 154  * Set a rawstring parameter.
 155  * @param n Parameter index
 156  * @param str Raw string
 157  */
 158 void ErrorMessageData::SetDParamStr(uint n, const char *str)
 159 {
 160         free(this->strings[n]);
 161         this->strings[n] = stredup(str);
 162 }
 163
 164 /** Define a queue with errors. */
 165 typedef std::list<ErrorMessageData> ErrorList;
 166 /** The actual queue with errors. */
 167 ErrorList _error_list;
 168 /** Whether the window system is initialized or not. */
 169 bool _window_system_initialized = false;
 170
 171 /** Window class for displaying an error message window. */
 172 struct ErrmsgWindow : public Window, ErrorMessageData {
 173 private:
 174         uint height_summary;            ///< Height of the #summary_msg string in pixels in the #WID_EM_MESSAGE widget.
 175         uint height_detailed;           ///< Height of the #detailed_msg string in pixels in the #WID_EM_MESSAGE widget.
 176
 177 public:
 178         ErrmsgWindow(const ErrorMessageData &data) : Window(data.HasFace() ? &_errmsg_face_desc : &_errmsg_desc), ErrorMessageData(data)
 179         {
 180                 this->InitNested();
 181         }
 182
 183         virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
 184         {
 185                 switch (widget) {
 186                         case WID_EM_MESSAGE: {
 187                                 CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
 188                                 if (this->textref_stack_size > 0) StartTextRefStackUsage(this->textref_stack_grffile, this->textref_stack_size, this->textref_stack);
 189
 190                                 int text_width = max(0, (int)size->width - WD_FRAMETEXT_LEFT - WD_FRAMETEXT_RIGHT);
 191                                 this->height_summary = GetStringHeight(this->summary_msg, text_width);
 192                                 this->height_detailed = (this->detailed_msg == INVALID_STRING_ID) ? 0 : GetStringHeight(this->detailed_msg, text_width);
 193
 194                                 if (this->textref_stack_size > 0) StopTextRefStackUsage();
 195
 196                                 uint panel_height = WD_FRAMERECT_TOP + this->height_summary + WD_FRAMERECT_BOTTOM;
 197                                 if (this->detailed_msg != INVALID_STRING_ID) panel_height += this->height_detailed + WD_PAR_VSEP_WIDE;
 198
 199                                 size->height = max(size->height, panel_height);
 200                                 break;
 201                         }
 202                         case WID_EM_FACE: {
 203                                 Dimension face_size = GetSpriteSize(SPR_GRADIENT);
 204                                 size->width = max(size->width, face_size.width);
 205                                 size->height = max(size->height, face_size.height);
 206                                 break;
 207                         }
 208                 }
 209         }
 210
 211         virtual Point OnInitialPosition(int16 sm_width, int16 sm_height, int window_number)
 212         {
 213                 /* Position (0, 0) given, center the window. */
 214                 if (this->position.x == 0 && this->position.y == 0) {
 215                         Point pt = {(_screen.width - sm_width) >> 1, (_screen.height - sm_height) >> 1};
 216                         return pt;
 217                 }
 218
 219                 /* Find the free screen space between the main toolbar at the top, and the statusbar at the bottom.
 220                  * Add a fixed distance 20 to make it less cluttered.
 221                  */
 222                 int scr_top = GetMainViewTop() + 20;
 223                 int scr_bot = GetMainViewBottom() - 20;
 224
 225                 Point pt = RemapCoords2(this->position.x, this->position.y);
 226                 const ViewPort *vp = FindWindowById(WC_MAIN_WINDOW, 0)->viewport;
 227                 if (this->face == INVALID_COMPANY) {
 228                         /* move x pos to opposite corner */
 229                         pt.x = UnScaleByZoom(pt.x - vp->virtual_left, vp->zoom) + vp->left;
 230                         pt.x = (pt.x < (_screen.width >> 1)) ? _screen.width - sm_width - 20 : 20; // Stay 20 pixels away from the edge of the screen.
 231
 232                         /* move y pos to opposite corner */
 233                         pt.y = UnScaleByZoom(pt.y - vp->virtual_top, vp->zoom) + vp->top;
 234                         pt.y = (pt.y < (_screen.height >> 1)) ? scr_bot - sm_height : scr_top;
 235                 } else {
 236                         pt.x = Clamp(UnScaleByZoom(pt.x - vp->virtual_left, vp->zoom) + vp->left - (sm_width / 2),  0, _screen.width  - sm_width);
 237                         pt.y = Clamp(UnScaleByZoom(pt.y - vp->virtual_top,  vp->zoom) + vp->top  - (sm_height / 2), scr_top, scr_bot - sm_height);
 238                 }
 239                 return pt;
 240         }
 241
 242         /**
 243          * Some data on this window has become invalid.
 244          * @param data Information about the changed data.
 245          * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 246          */
 247         virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
 248         {
 249                 /* If company gets shut down, while displaying an error about it, remove the error message. */
 250                 if (this->face != INVALID_COMPANY && !Company::IsValidID(this->face)) delete this;
 251         }
 252
 253         virtual void SetStringParameters(int widget) const
 254         {
 255                 if (widget == WID_EM_CAPTION) CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
 256         }
 257
 258         virtual void DrawWidget(const Rect &r, int widget) const
 259         {
 260                 switch (widget) {
 261                         case WID_EM_FACE: {
 262                                 const Company *c = Company::Get(this->face);
 263                                 DrawCompanyManagerFace(c->face, c->colour, r.left, r.top);
 264                                 break;
 265                         }
 266
 267                         case WID_EM_MESSAGE:
 268                                 CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
 269                                 if (this->textref_stack_size > 0) StartTextRefStackUsage(this->textref_stack_grffile, this->textref_stack_size, this->textref_stack);
 270
 271                                 if (this->detailed_msg == INVALID_STRING_ID) {
 272                                         DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, r.top + WD_FRAMERECT_TOP, r.bottom - WD_FRAMERECT_BOTTOM,
 273                                                         this->summary_msg, TC_FROMSTRING, SA_CENTER);
 274                                 } else {
 275                                         int extra = (r.bottom - r.top + 1 - this->height_summary - this->height_detailed - WD_PAR_VSEP_WIDE) / 2;
 276
 277                                         /* Note: NewGRF supplied error message often do not start with a colour code, so default to white. */
 278                                         int top = r.top + WD_FRAMERECT_TOP;
 279                                         int bottom = top + this->height_summary + extra;
 280                                         DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, top, bottom, this->summary_msg, TC_WHITE, SA_CENTER);
 281
 282                                         bottom = r.bottom - WD_FRAMERECT_BOTTOM;
 283                                         top = bottom - this->height_detailed - extra;
 284                                         DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, top, bottom, this->detailed_msg, TC_WHITE, SA_CENTER);
 285                                 }
 286
 287                                 if (this->textref_stack_size > 0) StopTextRefStackUsage();
 288                                 break;
 289
 290                         default:
 291                                 break;
 292                 }
 293         }
 294
 295         virtual void OnMouseLoop()
 296         {
 297                 /* Disallow closing the window too easily, if timeout is disabled */
 298                 if (_right_button_down && this->duration != 0) delete this;
 299         }
 300
 301         virtual void OnHundredthTick()
 302         {
 303                 /* Timeout enabled? */
 304                 if (this->duration != 0) {
 305                         this->duration--;
 306                         if (this->duration == 0) delete this;
 307                 }
 308         }
 309
 310         ~ErrmsgWindow()
 311         {
 312                 SetRedErrorSquare(INVALID_TILE);
 313                 if (_window_system_initialized) ShowFirstError();
 314         }
 315
 316         virtual EventState OnKeyPress(WChar key, uint16 keycode)
 317         {
 318                 if (keycode != WKC_SPACE) return ES_NOT_HANDLED;
 319                 delete this;
 320                 return ES_HANDLED;
 321         }
 322
 323         /**
 324          * Check whether the currently shown error message was critical or not.
 325          * @return True iff the message was critical.
 326          */
 327         bool IsCritical()
 328         {
 329                 return this->duration == 0;
 330         }
 331 };
 332
 333 /**
 334  * Clear all errors from the queue.
 335  */
 336 void ClearErrorMessages()
 337 {
 338         UnshowCriticalError();
 339         _error_list.clear();
 340 }
 341
 342 /** Show the first error of the queue. */
 343 void ShowFirstError()
 344 {
 345         _window_system_initialized = true;
 346         if (!_error_list.empty()) {
 347                 new ErrmsgWindow(_error_list.front());
 348                 _error_list.pop_front();
 349         }
 350 }
 351
 352 /**
 353  * Unshow the critical error. This has to happen when a critical
 354  * error is shown and we uninitialise the window system, i.e.
 355  * remove all the windows.
 356  */
 357 void UnshowCriticalError()
 358 {
 359         ErrmsgWindow *w = (ErrmsgWindow*)FindWindowById(WC_ERRMSG, 0);
 360         if (_window_system_initialized && w != NULL) {
 361                 if (w->IsCritical()) _error_list.push_front(*w);
 362                 _window_system_initialized = false;
 363                 delete w;
 364         }
 365 }
 366
 367 /**
 368  * Display an error message in a window.
 369  * @param summary_msg  General error message showed in first line. Must be valid.
 370  * @param detailed_msg Detailed error message showed in second line. Can be INVALID_STRING_ID.
 371  * @param wl           Message severity.
 372  * @param x            World X position (TileVirtX) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
 373  * @param y            World Y position (TileVirtY) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
 374  * @param textref_stack_grffile NewGRF providing the #TextRefStack for the error message.
 375  * @param textref_stack_size Number of uint32 values to put on the #TextRefStack for the error message; 0 if the #TextRefStack shall not be used.
 376  * @param textref_stack Values to put on the #TextRefStack.
 377  */
 378 void ShowErrorMessage(StringID summary_msg, StringID detailed_msg, WarningLevel wl, int x, int y, const GRFFile *textref_stack_grffile, uint textref_stack_size, const uint32 *textref_stack)
 379 {
 380         assert(textref_stack_size == 0 || (textref_stack_grffile != NULL && textref_stack != NULL));
 381         if (summary_msg == STR_NULL) summary_msg = STR_EMPTY;
 382
 383         if (wl != WL_INFO) {
 384                 /* Print message to console */
 385                 char buf[DRAW_STRING_BUFFER];
 386
 387                 if (textref_stack_size > 0) StartTextRefStackUsage(textref_stack_grffile, textref_stack_size, textref_stack);
 388
 389                 char *b = GetString(buf, summary_msg, lastof(buf));
 390                 if (detailed_msg != INVALID_STRING_ID) {
 391                         b += seprintf(b, lastof(buf), " ");
 392                         GetString(b, detailed_msg, lastof(buf));
 393                 }
 394
 395                 if (textref_stack_size > 0) StopTextRefStackUsage();
 396
 397                 switch (wl) {
 398                         case WL_WARNING: IConsolePrint(CC_WARNING, buf); break;
 399                         default:         IConsoleError(buf); break;
 400                 }
 401         }
 402
 403         bool no_timeout = wl == WL_CRITICAL;
 404
 405         if (_settings_client.gui.errmsg_duration == 0 && !no_timeout) return;
 406
 407         ErrorMessageData data(summary_msg, detailed_msg, no_timeout ? 0 : _settings_client.gui.errmsg_duration, x, y, textref_stack_grffile, textref_stack_size, textref_stack);
 408         data.CopyOutDParams();
 409
 410         ErrmsgWindow *w = (ErrmsgWindow*)FindWindowById(WC_ERRMSG, 0);
 411         if (w != NULL && w->IsCritical()) {
 412                 /* A critical error is currently shown. */
 413                 if (wl == WL_CRITICAL) {
 414                         /* Push another critical error in the queue of errors,
 415                          * but do not put other errors in the queue. */
 416                         _error_list.push_back(data);
 417                 }
 418         } else {
 419                 /* Nothing or a non-critical error was shown. */
 420                 delete w;
 421                 new ErrmsgWindow(data);
 422         }
 423 }
 424
 425 /**
 426  * Schedule a list of errors.
 427  * Note: This does not try to display the error now. This is useful if the window system is not yet running.
 428  * @param data Error message datas; cleared afterwards
 429  */
 430 void ScheduleErrorMessage(ErrorList &datas)
 431 {
 432         _error_list.splice(_error_list.end(), datas);
 433 }
 434
 435 /**
 436  * Schedule an error.
 437  * Note: This does not try to display the error now. This is useful if the window system is not yet running.
 438  * @param data Error message data; cleared afterwards
 439  */
 440 void ScheduleErrorMessage(const ErrorMessageData &data)
 441 {
 442         _error_list.push_back(data);
 443 }