reactos/base/shell/explorer/taskswnd.cpp

   1 /*
   2  * ReactOS Explorer
   3  *
   4  * Copyright 2006 - 2007 Thomas Weidenmueller <w3seek@reactos.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include "precomp.h"
  22 #include <commoncontrols.h>
  23
  24 /* Set DUMP_TASKS to 1 to enable a dump of the tasks and task groups every
  25    5 seconds */
  26 #define DUMP_TASKS  0
  27 #define DEBUG_SHELL_HOOK 0
  28
  29 #define MAX_TASKS_COUNT (0x7FFF)
  30 #define TASK_ITEM_ARRAY_ALLOC   64
  31
  32 const WCHAR szTaskSwitchWndClass[] = L"MSTaskSwWClass";
  33 const WCHAR szRunningApps[] = L"Running Applications";
  34
  35 #if DEBUG_SHELL_HOOK
  36 const struct {
  37     INT msg;
  38     LPCWSTR msg_name;
  39 } hshell_msg [] = {
  40         { HSHELL_WINDOWCREATED, L"HSHELL_WINDOWCREATED" },
  41         { HSHELL_WINDOWDESTROYED, L"HSHELL_WINDOWDESTROYED" },
  42         { HSHELL_ACTIVATESHELLWINDOW, L"HSHELL_ACTIVATESHELLWINDOW" },
  43         { HSHELL_WINDOWACTIVATED, L"HSHELL_WINDOWACTIVATED" },
  44         { HSHELL_GETMINRECT, L"HSHELL_GETMINRECT" },
  45         { HSHELL_REDRAW, L"HSHELL_REDRAW" },
  46         { HSHELL_TASKMAN, L"HSHELL_TASKMAN" },
  47         { HSHELL_LANGUAGE, L"HSHELL_LANGUAGE" },
  48         { HSHELL_SYSMENU, L"HSHELL_SYSMENU" },
  49         { HSHELL_ENDTASK, L"HSHELL_ENDTASK" },
  50         { HSHELL_ACCESSIBILITYSTATE, L"HSHELL_ACCESSIBILITYSTATE" },
  51         { HSHELL_APPCOMMAND, L"HSHELL_APPCOMMAND" },
  52         { HSHELL_WINDOWREPLACED, L"HSHELL_WINDOWREPLACED" },
  53         { HSHELL_WINDOWREPLACING, L"HSHELL_WINDOWREPLACING" },
  54         { HSHELL_RUDEAPPACTIVATED, L"HSHELL_RUDEAPPACTIVATED" },
  55 };
  56 #endif
  57
  58 typedef struct _TASK_GROUP
  59 {
  60     /* We have to use a linked list instead of an array so we don't have to
  61        update all pointers to groups in the task item array when removing
  62        groups. */
  63     struct _TASK_GROUP *Next;
  64
  65     DWORD dwTaskCount;
  66     DWORD dwProcessId;
  67     INT Index;
  68     union
  69     {
  70         DWORD dwFlags;
  71         struct
  72         {
  73
  74             DWORD IsCollapsed : 1;
  75         };
  76     };
  77 } TASK_GROUP, *PTASK_GROUP;
  78
  79 typedef struct _TASK_ITEM
  80 {
  81     HWND hWnd;
  82     PTASK_GROUP Group;
  83     INT Index;
  84     INT IconIndex;
  85
  86     union
  87     {
  88         DWORD dwFlags;
  89         struct
  90         {
  91
  92             /* IsFlashing is TRUE when the task bar item should be flashing. */
  93             DWORD IsFlashing : 1;
  94
  95             /* RenderFlashed is only TRUE if the task bar item should be
  96                drawn with a flash. */
  97             DWORD RenderFlashed : 1;
  98         };
  99     };
 100 } TASK_ITEM, *PTASK_ITEM;
 101
 102 class CTaskToolbar :
 103     public CWindowImplBaseT< CToolbar<TASK_ITEM>, CControlWinTraits >
 104 {
 105 public:
 106     INT UpdateTbButtonSpacing(IN BOOL bHorizontal, IN BOOL bThemed, IN UINT uiRows = 0, IN UINT uiBtnsPerLine = 0)
 107     {
 108         TBMETRICS tbm;
 109
 110         tbm.cbSize = sizeof(tbm);
 111         tbm.dwMask = TBMF_BARPAD | TBMF_BUTTONSPACING;
 112
 113         tbm.cxBarPad = tbm.cyBarPad = 0;
 114
 115         if (bThemed)
 116         {
 117             tbm.cxButtonSpacing = 0;
 118             tbm.cyButtonSpacing = 0;
 119         }
 120         else
 121         {
 122             if (bHorizontal || uiBtnsPerLine > 1)
 123                 tbm.cxButtonSpacing = (3 * GetSystemMetrics(SM_CXEDGE) / 2);
 124             else
 125                 tbm.cxButtonSpacing = 0;
 126
 127             if (!bHorizontal || uiRows > 1)
 128                 tbm.cyButtonSpacing = (3 * GetSystemMetrics(SM_CYEDGE) / 2);
 129             else
 130                 tbm.cyButtonSpacing = 0;
 131         }
 132
 133         SetMetrics(&tbm);
 134
 135         return tbm.cxButtonSpacing;
 136     }
 137
 138     VOID BeginUpdate()
 139     {
 140         SetRedraw(FALSE);
 141     }
 142
 143     VOID EndUpdate()
 144     {
 145         SendMessageW(WM_SETREDRAW, TRUE);
 146         InvalidateRect(NULL, TRUE);
 147     }
 148
 149     BOOL SetButtonCommandId(IN INT iButtonIndex, IN INT iCommandId)
 150     {
 151         TBBUTTONINFO tbbi;
 152
 153         tbbi.cbSize = sizeof(tbbi);
 154         tbbi.dwMask = TBIF_BYINDEX | TBIF_COMMAND;
 155         tbbi.idCommand = iCommandId;
 156
 157         return SetButtonInfo(iButtonIndex, &tbbi) != 0;
 158     }
 159
 160     LRESULT OnNcHitTestToolbar(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 161     {
 162         POINT pt;
 163
 164         /* See if the mouse is on a button */
 165         pt.x = GET_X_LPARAM(lParam);
 166         pt.y = GET_Y_LPARAM(lParam);
 167         ScreenToClient(&pt);
 168
 169         INT index = HitTest(&pt);
 170         if (index < 0)
 171         {
 172             /* Make the control appear to be transparent outside of any buttons */
 173             return HTTRANSPARENT;
 174         }
 175
 176         bHandled = FALSE;
 177         return 0;
 178     }
 179
 180 public:
 181     BEGIN_MSG_MAP(CNotifyToolbar)
 182         MESSAGE_HANDLER(WM_NCHITTEST, OnNcHitTestToolbar)
 183     END_MSG_MAP()
 184
 185     BOOL Initialize(HWND hWndParent)
 186     {
 187         DWORD styles = WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN |
 188             TBSTYLE_TOOLTIPS | TBSTYLE_WRAPABLE | TBSTYLE_LIST | TBSTYLE_TRANSPARENT |
 189             CCS_TOP | CCS_NORESIZE | CCS_NODIVIDER;
 190
 191         return SubclassWindow(CToolbar::Create(hWndParent, styles));
 192     }
 193 };
 194
 195 class CTaskSwitchWnd :
 196     public CWindowImpl < CTaskSwitchWnd, CWindow, CControlWinTraits >
 197 {
 198     CTaskToolbar m_TaskBar;
 199
 200     CComPtr<ITrayWindow> m_Tray;
 201
 202     UINT m_ShellHookMsg;
 203
 204     WORD m_TaskItemCount;
 205     WORD m_AllocatedTaskItems;
 206
 207     PTASK_GROUP m_TaskGroups;
 208     PTASK_ITEM m_TaskItems;
 209     PTASK_ITEM m_ActiveTaskItem;
 210
 211     HTHEME m_Theme;
 212     UINT m_ButtonsPerLine;
 213     WORD m_ButtonCount;
 214
 215     HIMAGELIST m_ImageList;
 216
 217     BOOL m_IsGroupingEnabled;
 218     BOOL m_IsDestroying;
 219
 220     SIZE m_ButtonSize;
 221
 222 public:
 223     CTaskSwitchWnd() :
 224         m_ShellHookMsg(NULL),
 225         m_TaskItemCount(0),
 226         m_AllocatedTaskItems(0),
 227         m_TaskGroups(NULL),
 228         m_TaskItems(NULL),
 229         m_ActiveTaskItem(NULL),
 230         m_Theme(NULL),
 231         m_ButtonsPerLine(0),
 232         m_ButtonCount(0),
 233         m_ImageList(NULL),
 234         m_IsGroupingEnabled(FALSE),
 235         m_IsDestroying(FALSE)
 236     {
 237         ZeroMemory(&m_ButtonSize, sizeof(m_ButtonSize));
 238     }
 239     virtual ~CTaskSwitchWnd() { }
 240
 241     INT GetWndTextFromTaskItem(IN PTASK_ITEM TaskItem, LPWSTR szBuf, DWORD cchBuf)
 242     {
 243         /* Get the window text without sending a message so we don't hang if an
 244            application isn't responding! */
 245         return InternalGetWindowText(TaskItem->hWnd, szBuf, cchBuf);
 246     }
 247
 248
 249 #if DUMP_TASKS != 0
 250     VOID DumpTasks()
 251     {
 252         PTASK_GROUP CurrentGroup;
 253         PTASK_ITEM CurrentTaskItem, LastTaskItem;
 254
 255         TRACE("Tasks dump:\n");
 256         if (m_IsGroupingEnabled)
 257         {
 258             CurrentGroup = m_TaskGroups;
 259             while (CurrentGroup != NULL)
 260             {
 261                 TRACE("- Group PID: 0x%p Tasks: %d Index: %d\n", CurrentGroup->dwProcessId, CurrentGroup->dwTaskCount, CurrentGroup->Index);
 262
 263                 CurrentTaskItem = m_TaskItems;
 264                 LastTaskItem = CurrentTaskItem + m_TaskItemCount;
 265                 while (CurrentTaskItem != LastTaskItem)
 266                 {
 267                     if (CurrentTaskItem->Group == CurrentGroup)
 268                     {
 269                         TRACE("  + Task hwnd: 0x%p Index: %d\n", CurrentTaskItem->hWnd, CurrentTaskItem->Index);
 270                     }
 271                     CurrentTaskItem++;
 272                 }
 273
 274                 CurrentGroup = CurrentGroup->Next;
 275             }
 276
 277             CurrentTaskItem = m_TaskItems;
 278             LastTaskItem = CurrentTaskItem + m_TaskItemCount;
 279             while (CurrentTaskItem != LastTaskItem)
 280             {
 281                 if (CurrentTaskItem->Group == NULL)
 282                 {
 283                     TRACE("- Task hwnd: 0x%p Index: %d\n", CurrentTaskItem->hWnd, CurrentTaskItem->Index);
 284                 }
 285                 CurrentTaskItem++;
 286             }
 287         }
 288         else
 289         {
 290             CurrentTaskItem = m_TaskItems;
 291             LastTaskItem = CurrentTaskItem + m_TaskItemCount;
 292             while (CurrentTaskItem != LastTaskItem)
 293             {
 294                 TRACE("- Task hwnd: 0x%p Index: %d\n", CurrentTaskItem->hWnd, CurrentTaskItem->Index);
 295                 CurrentTaskItem++;
 296             }
 297         }
 298     }
 299 #endif
 300
 301     VOID UpdateIndexesAfter(IN INT iIndex, BOOL bInserted)
 302     {
 303         PTASK_GROUP CurrentGroup;
 304         PTASK_ITEM CurrentTaskItem, LastTaskItem;
 305         INT NewIndex;
 306
 307         int offset = bInserted ? +1 : -1;
 308
 309         if (m_IsGroupingEnabled)
 310         {
 311             /* Update all affected groups */
 312             CurrentGroup = m_TaskGroups;
 313             while (CurrentGroup != NULL)
 314             {
 315                 if (CurrentGroup->IsCollapsed &&
 316                     CurrentGroup->Index >= iIndex)
 317                 {
 318                     /* Update the toolbar buttons */
 319                     NewIndex = CurrentGroup->Index + offset;
 320                     if (m_TaskBar.SetButtonCommandId(CurrentGroup->Index + offset, NewIndex))
 321                     {
 322                         CurrentGroup->Index = NewIndex;
 323                     }
 324                     else
 325                         CurrentGroup->Index = -1;
 326                 }
 327
 328                 CurrentGroup = CurrentGroup->Next;
 329             }
 330         }
 331
 332         /* Update all affected task items */
 333         CurrentTaskItem = m_TaskItems;
 334         LastTaskItem = CurrentTaskItem + m_TaskItemCount;
 335         while (CurrentTaskItem != LastTaskItem)
 336         {
 337             CurrentGroup = CurrentTaskItem->Group;
 338             if (CurrentGroup != NULL)
 339             {
 340                 if (!CurrentGroup->IsCollapsed &&
 341                     CurrentTaskItem->Index >= iIndex)
 342                 {
 343                     goto UpdateTaskItemBtn;
 344                 }
 345             }
 346             else if (CurrentTaskItem->Index >= iIndex)
 347             {
 348             UpdateTaskItemBtn:
 349                 /* Update the toolbar buttons */
 350                 NewIndex = CurrentTaskItem->Index + offset;
 351                 if (m_TaskBar.SetButtonCommandId(CurrentTaskItem->Index + offset, NewIndex))
 352                 {
 353                     CurrentTaskItem->Index = NewIndex;
 354                 }
 355                 else
 356                     CurrentTaskItem->Index = -1;
 357             }
 358
 359             CurrentTaskItem++;
 360         }
 361     }
 362
 363
 364     INT UpdateTaskGroupButton(IN PTASK_GROUP TaskGroup)
 365     {
 366         ASSERT(TaskGroup->Index >= 0);
 367
 368         /* FIXME: Implement */
 369
 370         return TaskGroup->Index;
 371     }
 372
 373     VOID ExpandTaskGroup(IN PTASK_GROUP TaskGroup)
 374     {
 375         ASSERT(TaskGroup->dwTaskCount > 0);
 376         ASSERT(TaskGroup->IsCollapsed);
 377         ASSERT(TaskGroup->Index >= 0);
 378
 379         /* FIXME: Implement */
 380     }
 381
 382     HICON GetWndIcon(HWND hwnd)
 383     {
 384         HICON hIcon = 0;
 385
 386         SendMessageTimeout(hwnd, WM_GETICON, ICON_SMALL2, 0, SMTO_ABORTIFHUNG, 1000, (PDWORD_PTR) &hIcon);
 387         if (hIcon)
 388             return hIcon;
 389
 390         SendMessageTimeout(hwnd, WM_GETICON, ICON_SMALL, 0, SMTO_ABORTIFHUNG, 1000, (PDWORD_PTR) &hIcon);
 391         if (hIcon)
 392             return hIcon;
 393
 394         SendMessageTimeout(hwnd, WM_GETICON, ICON_BIG, 0, SMTO_ABORTIFHUNG, 1000, (PDWORD_PTR) &hIcon);
 395         if (hIcon)
 396             return hIcon;
 397
 398         hIcon = (HICON) GetClassLongPtr(hwnd, GCL_HICONSM);
 399         if (hIcon)
 400             return hIcon;
 401
 402         hIcon = (HICON) GetClassLongPtr(hwnd, GCL_HICON);
 403
 404         return hIcon;
 405     }
 406
 407     INT UpdateTaskItemButton(IN PTASK_ITEM TaskItem)
 408     {
 409         TBBUTTONINFO tbbi = { 0 };
 410         HICON icon;
 411         WCHAR windowText[255];
 412
 413         ASSERT(TaskItem->Index >= 0);
 414
 415         tbbi.cbSize = sizeof(tbbi);
 416         tbbi.dwMask = TBIF_BYINDEX | TBIF_STATE | TBIF_TEXT | TBIF_IMAGE;
 417         tbbi.fsState = TBSTATE_ENABLED;
 418         if (m_ActiveTaskItem == TaskItem)
 419             tbbi.fsState |= TBSTATE_CHECKED;
 420
 421         if (TaskItem->RenderFlashed)
 422             tbbi.fsState |= TBSTATE_MARKED;
 423
 424         /* Check if we're updating a button that is the last one in the
 425            line. If so, we need to set the TBSTATE_WRAP flag! */
 426         if (!m_Tray->IsHorizontal() || (m_ButtonsPerLine != 0 &&
 427             (TaskItem->Index + 1) % m_ButtonsPerLine == 0))
 428         {
 429             tbbi.fsState |= TBSTATE_WRAP;
 430         }
 431
 432         if (GetWndTextFromTaskItem(TaskItem, windowText, _countof(windowText)) > 0)
 433         {
 434             tbbi.pszText = windowText;
 435         }
 436
 437         icon = GetWndIcon(TaskItem->hWnd);
 438         if (!icon)
 439             icon = static_cast<HICON>(LoadImageW(NULL, MAKEINTRESOURCEW(OIC_SAMPLE), IMAGE_ICON, 0, 0, LR_SHARED | LR_DEFAULTSIZE));
 440         TaskItem->IconIndex = ImageList_ReplaceIcon(m_ImageList, TaskItem->IconIndex, icon);
 441         tbbi.iImage = TaskItem->IconIndex;
 442
 443         if (!m_TaskBar.SetButtonInfo(TaskItem->Index, &tbbi))
 444         {
 445             TaskItem->Index = -1;
 446             return -1;
 447         }
 448
 449         TRACE("Updated button %d for hwnd 0x%p\n", TaskItem->Index, TaskItem->hWnd);
 450         return TaskItem->Index;
 451     }
 452
 453     VOID RemoveIcon(IN PTASK_ITEM TaskItem)
 454     {
 455         TBBUTTONINFO tbbi;
 456         PTASK_ITEM currentTaskItem, LastItem;
 457
 458         if (TaskItem->IconIndex == -1)
 459             return;
 460
 461         tbbi.cbSize = sizeof(tbbi);
 462         tbbi.dwMask = TBIF_IMAGE;
 463
 464         currentTaskItem = m_TaskItems;
 465         LastItem = currentTaskItem + m_TaskItemCount;
 466         while (currentTaskItem != LastItem)
 467         {
 468             if (currentTaskItem->IconIndex > TaskItem->IconIndex)
 469             {
 470                 currentTaskItem->IconIndex--;
 471                 tbbi.iImage = currentTaskItem->IconIndex;
 472
 473                 m_TaskBar.SetButtonInfo(currentTaskItem->Index, &tbbi);
 474             }
 475             currentTaskItem++;
 476         }
 477
 478         ImageList_Remove(m_ImageList, TaskItem->IconIndex);
 479     }
 480
 481     PTASK_ITEM FindLastTaskItemOfGroup(
 482         IN PTASK_GROUP TaskGroup  OPTIONAL,
 483         IN PTASK_ITEM NewTaskItem  OPTIONAL)
 484     {
 485         PTASK_ITEM TaskItem, LastTaskItem, FoundTaskItem = NULL;
 486         DWORD dwTaskCount;
 487
 488         ASSERT(m_IsGroupingEnabled);
 489
 490         TaskItem = m_TaskItems;
 491         LastTaskItem = TaskItem + m_TaskItemCount;
 492
 493         dwTaskCount = (TaskGroup != NULL ? TaskGroup->dwTaskCount : MAX_TASKS_COUNT);
 494
 495         ASSERT(dwTaskCount > 0);
 496
 497         while (TaskItem != LastTaskItem)
 498         {
 499             if (TaskItem->Group == TaskGroup)
 500             {
 501                 if ((NewTaskItem != NULL && TaskItem != NewTaskItem) || NewTaskItem == NULL)
 502                 {
 503                     FoundTaskItem = TaskItem;
 504                 }
 505
 506                 if (--dwTaskCount == 0)
 507                 {
 508                     /* We found the last task item in the group! */
 509                     break;
 510                 }
 511             }
 512
 513             TaskItem++;
 514         }
 515
 516         return FoundTaskItem;
 517     }
 518
 519     INT CalculateTaskItemNewButtonIndex(IN PTASK_ITEM TaskItem)
 520     {
 521         PTASK_GROUP TaskGroup;
 522         PTASK_ITEM LastTaskItem;
 523
 524         /* NOTE: This routine assumes that the group is *not* collapsed! */
 525
 526         TaskGroup = TaskItem->Group;
 527         if (m_IsGroupingEnabled)
 528         {
 529             if (TaskGroup != NULL)
 530             {
 531                 ASSERT(TaskGroup->Index < 0);
 532                 ASSERT(!TaskGroup->IsCollapsed);
 533
 534                 if (TaskGroup->dwTaskCount > 1)
 535                 {
 536                     LastTaskItem = FindLastTaskItemOfGroup(TaskGroup, TaskItem);
 537                     if (LastTaskItem != NULL)
 538                     {
 539                         /* Since the group is expanded the task items must have an index */
 540                         ASSERT(LastTaskItem->Index >= 0);
 541
 542                         return LastTaskItem->Index + 1;
 543                     }
 544                 }
 545             }
 546             else
 547             {
 548                 /* Find the last NULL group button. NULL groups are added at the end of the
 549                    task item list when grouping is enabled */
 550                 LastTaskItem = FindLastTaskItemOfGroup(NULL, TaskItem);
 551                 if (LastTaskItem != NULL)
 552                 {
 553                     ASSERT(LastTaskItem->Index >= 0);
 554
 555                     return LastTaskItem->Index + 1;
 556                 }
 557             }
 558         }
 559
 560         return m_ButtonCount;
 561     }
 562
 563     INT AddTaskItemButton(IN OUT PTASK_ITEM TaskItem)
 564     {
 565         WCHAR windowText[255];
 566         TBBUTTON tbBtn = { 0 };
 567         INT iIndex;
 568         HICON icon;
 569
 570         if (TaskItem->Index >= 0)
 571         {
 572             return UpdateTaskItemButton(TaskItem);
 573         }
 574
 575         if (TaskItem->Group != NULL &&
 576             TaskItem->Group->IsCollapsed)
 577         {
 578             /* The task group is collapsed, we only need to update the group button */
 579             return UpdateTaskGroupButton(TaskItem->Group);
 580         }
 581
 582         icon = GetWndIcon(TaskItem->hWnd);
 583         if (!icon)
 584             icon = static_cast<HICON>(LoadImageW(NULL, MAKEINTRESOURCEW(OIC_SAMPLE), IMAGE_ICON, 0, 0, LR_SHARED | LR_DEFAULTSIZE));
 585         TaskItem->IconIndex = ImageList_ReplaceIcon(m_ImageList, -1, icon);
 586
 587         tbBtn.iBitmap = TaskItem->IconIndex;
 588         tbBtn.fsState = TBSTATE_ENABLED | TBSTATE_ELLIPSES;
 589         tbBtn.fsStyle = BTNS_CHECK | BTNS_NOPREFIX | BTNS_SHOWTEXT;
 590         tbBtn.dwData = TaskItem->Index;
 591
 592         if (GetWndTextFromTaskItem(TaskItem, windowText, _countof(windowText)) > 0)
 593         {
 594             tbBtn.iString = (DWORD_PTR) windowText;
 595         }
 596
 597         /* Find out where to insert the new button */
 598         iIndex = CalculateTaskItemNewButtonIndex(TaskItem);
 599         ASSERT(iIndex >= 0);
 600         tbBtn.idCommand = iIndex;
 601
 602         m_TaskBar.BeginUpdate();
 603
 604         if (m_TaskBar.InsertButton(iIndex, &tbBtn))
 605         {
 606             UpdateIndexesAfter(iIndex, TRUE);
 607
 608             TRACE("Added button %d for hwnd 0x%p\n", iIndex, TaskItem->hWnd);
 609
 610             TaskItem->Index = iIndex;
 611             m_ButtonCount++;
 612
 613             /* Update button sizes and fix the button wrapping */
 614             UpdateButtonsSize(TRUE);
 615             return iIndex;
 616         }
 617
 618         m_TaskBar.EndUpdate();
 619
 620         return -1;
 621     }
 622
 623     BOOL DeleteTaskItemButton(IN OUT PTASK_ITEM TaskItem)
 624     {
 625         PTASK_GROUP TaskGroup;
 626         INT iIndex;
 627
 628         TaskGroup = TaskItem->Group;
 629
 630         if (TaskItem->Index >= 0)
 631         {
 632             if ((TaskGroup != NULL && !TaskGroup->IsCollapsed) ||
 633                 TaskGroup == NULL)
 634             {
 635                 m_TaskBar.BeginUpdate();
 636
 637                 RemoveIcon(TaskItem);
 638                 iIndex = TaskItem->Index;
 639                 if (m_TaskBar.DeleteButton(iIndex))
 640                 {
 641                     TaskItem->Index = -1;
 642                     m_ButtonCount--;
 643
 644                     UpdateIndexesAfter(iIndex, FALSE);
 645
 646                     /* Update button sizes and fix the button wrapping */
 647                     UpdateButtonsSize(TRUE);
 648                     return TRUE;
 649                 }
 650
 651                 m_TaskBar.EndUpdate();
 652             }
 653         }
 654
 655         return FALSE;
 656     }
 657
 658     PTASK_GROUP AddToTaskGroup(IN HWND hWnd)
 659     {
 660         DWORD dwProcessId;
 661         PTASK_GROUP TaskGroup, *PrevLink;
 662
 663         if (!GetWindowThreadProcessId(hWnd,
 664             &dwProcessId))
 665         {
 666             TRACE("Cannot get process id of hwnd 0x%p\n", hWnd);
 667             return NULL;
 668         }
 669
 670         /* Try to find an existing task group */
 671         TaskGroup = m_TaskGroups;
 672         PrevLink = &m_TaskGroups;
 673         while (TaskGroup != NULL)
 674         {
 675             if (TaskGroup->dwProcessId == dwProcessId)
 676             {
 677                 TaskGroup->dwTaskCount++;
 678                 return TaskGroup;
 679             }
 680
 681             PrevLink = &TaskGroup->Next;
 682             TaskGroup = TaskGroup->Next;
 683         }
 684
 685         /* Allocate a new task group */
 686         TaskGroup = (PTASK_GROUP) HeapAlloc(hProcessHeap,
 687             HEAP_ZERO_MEMORY,
 688             sizeof(*TaskGroup));
 689         if (TaskGroup != NULL)
 690         {
 691             TaskGroup->dwTaskCount = 1;
 692             TaskGroup->dwProcessId = dwProcessId;
 693             TaskGroup->Index = -1;
 694
 695             /* Add the task group to the list */
 696             *PrevLink = TaskGroup;
 697         }
 698
 699         return TaskGroup;
 700     }
 701
 702     VOID RemoveTaskFromTaskGroup(IN OUT PTASK_ITEM TaskItem)
 703     {
 704         PTASK_GROUP TaskGroup, CurrentGroup, *PrevLink;
 705
 706         TaskGroup = TaskItem->Group;
 707         if (TaskGroup != NULL)
 708         {
 709             DWORD dwNewTaskCount = --TaskGroup->dwTaskCount;
 710             if (dwNewTaskCount == 0)
 711             {
 712                 /* Find the previous pointer in the chain */
 713                 CurrentGroup = m_TaskGroups;
 714                 PrevLink = &m_TaskGroups;
 715                 while (CurrentGroup != TaskGroup)
 716                 {
 717                     PrevLink = &CurrentGroup->Next;
 718                     CurrentGroup = CurrentGroup->Next;
 719                 }
 720
 721                 /* Remove the group from the list */
 722                 ASSERT(TaskGroup == CurrentGroup);
 723                 *PrevLink = TaskGroup->Next;
 724
 725                 /* Free the task group */
 726                 HeapFree(hProcessHeap,
 727                     0,
 728                     TaskGroup);
 729             }
 730             else if (TaskGroup->IsCollapsed &&
 731                 TaskGroup->Index >= 0)
 732             {
 733                 if (dwNewTaskCount > 1)
 734                 {
 735                     /* FIXME: Check if we should expand the group */
 736                     /* Update the task group button */
 737                     UpdateTaskGroupButton(TaskGroup);
 738                 }
 739                 else
 740                 {
 741                     /* Expand the group of one task button to a task button */
 742                     ExpandTaskGroup(TaskGroup);
 743                 }
 744             }
 745         }
 746     }
 747
 748     PTASK_ITEM FindTaskItem(IN HWND hWnd)
 749     {
 750         PTASK_ITEM TaskItem, LastItem;
 751
 752         TaskItem = m_TaskItems;
 753         LastItem = TaskItem + m_TaskItemCount;
 754         while (TaskItem != LastItem)
 755         {
 756             if (TaskItem->hWnd == hWnd)
 757                 return TaskItem;
 758
 759             TaskItem++;
 760         }
 761
 762         return NULL;
 763     }
 764
 765     PTASK_ITEM FindOtherTaskItem(IN HWND hWnd)
 766     {
 767         PTASK_ITEM LastItem, TaskItem;
 768         PTASK_GROUP TaskGroup;
 769         DWORD dwProcessId;
 770
 771         if (!GetWindowThreadProcessId(hWnd, &dwProcessId))
 772         {
 773             return NULL;
 774         }
 775
 776         /* Try to find another task that belongs to the same
 777            process as the given window */
 778         TaskItem = m_TaskItems;
 779         LastItem = TaskItem + m_TaskItemCount;
 780         while (TaskItem != LastItem)
 781         {
 782             TaskGroup = TaskItem->Group;
 783             if (TaskGroup != NULL)
 784             {
 785                 if (TaskGroup->dwProcessId == dwProcessId)
 786                     return TaskItem;
 787             }
 788             else
 789             {
 790                 DWORD dwProcessIdTask;
 791
 792                 if (GetWindowThreadProcessId(TaskItem->hWnd,
 793                     &dwProcessIdTask) &&
 794                     dwProcessIdTask == dwProcessId)
 795                 {
 796                     return TaskItem;
 797                 }
 798             }
 799
 800             TaskItem++;
 801         }
 802
 803         return NULL;
 804     }
 805
 806     PTASK_ITEM AllocTaskItem()
 807     {
 808         if (m_TaskItemCount >= MAX_TASKS_COUNT)
 809         {
 810             /* We need the most significant bit in 16 bit command IDs to indicate whether it
 811                is a task group or task item. WM_COMMAND limits command IDs to 16 bits! */
 812             return NULL;
 813         }
 814
 815         ASSERT(m_AllocatedTaskItems >= m_TaskItemCount);
 816
 817         if (m_TaskItemCount == 0)
 818         {
 819             m_TaskItems = (PTASK_ITEM) HeapAlloc(hProcessHeap,
 820                 0,
 821                 TASK_ITEM_ARRAY_ALLOC * sizeof(*m_TaskItems));
 822             if (m_TaskItems != NULL)
 823             {
 824                 m_AllocatedTaskItems = TASK_ITEM_ARRAY_ALLOC;
 825             }
 826             else
 827                 return NULL;
 828         }
 829         else if (m_TaskItemCount >= m_AllocatedTaskItems)
 830         {
 831             PTASK_ITEM NewArray;
 832             SIZE_T NewArrayLength, ActiveTaskItemIndex;
 833
 834             NewArrayLength = m_AllocatedTaskItems + TASK_ITEM_ARRAY_ALLOC;
 835
 836             NewArray = (PTASK_ITEM) HeapReAlloc(hProcessHeap,
 837                 0,
 838                 m_TaskItems,
 839                 NewArrayLength * sizeof(*m_TaskItems));
 840             if (NewArray != NULL)
 841             {
 842                 if (m_ActiveTaskItem != NULL)
 843                 {
 844                     /* Fixup the ActiveTaskItem pointer */
 845                     ActiveTaskItemIndex = m_ActiveTaskItem - m_TaskItems;
 846                     m_ActiveTaskItem = NewArray + ActiveTaskItemIndex;
 847                 }
 848                 m_AllocatedTaskItems = (WORD) NewArrayLength;
 849                 m_TaskItems = NewArray;
 850             }
 851             else
 852                 return NULL;
 853         }
 854
 855         return m_TaskItems + m_TaskItemCount++;
 856     }
 857
 858     VOID FreeTaskItem(IN OUT PTASK_ITEM TaskItem)
 859     {
 860         WORD wIndex;
 861
 862         if (TaskItem == m_ActiveTaskItem)
 863             m_ActiveTaskItem = NULL;
 864
 865         wIndex = (WORD) (TaskItem - m_TaskItems);
 866         if (wIndex + 1 < m_TaskItemCount)
 867         {
 868             MoveMemory(TaskItem,
 869                 TaskItem + 1,
 870                 (m_TaskItemCount - wIndex - 1) * sizeof(*TaskItem));
 871         }
 872
 873         m_TaskItemCount--;
 874     }
 875
 876     VOID DeleteTaskItem(IN OUT PTASK_ITEM TaskItem)
 877     {
 878         if (!m_IsDestroying)
 879         {
 880             /* Delete the task button from the toolbar */
 881             DeleteTaskItemButton(TaskItem);
 882         }
 883
 884         /* Remove the task from it's group */
 885         RemoveTaskFromTaskGroup(TaskItem);
 886
 887         /* Free the task item */
 888         FreeTaskItem(TaskItem);
 889     }
 890
 891     VOID CheckActivateTaskItem(IN OUT PTASK_ITEM TaskItem)
 892     {
 893         PTASK_ITEM CurrentTaskItem;
 894         PTASK_GROUP TaskGroup = NULL;
 895
 896         CurrentTaskItem = m_ActiveTaskItem;
 897
 898         if (TaskItem != NULL)
 899             TaskGroup = TaskItem->Group;
 900
 901         if (m_IsGroupingEnabled &&
 902             TaskGroup != NULL &&
 903             TaskGroup->IsCollapsed)
 904         {
 905             /* FIXME */
 906             return;
 907         }
 908
 909         if (CurrentTaskItem != NULL)
 910         {
 911             PTASK_GROUP CurrentTaskGroup;
 912
 913             if (CurrentTaskItem == TaskItem)
 914                 return;
 915
 916             CurrentTaskGroup = CurrentTaskItem->Group;
 917
 918             if (m_IsGroupingEnabled &&
 919                 CurrentTaskGroup != NULL &&
 920                 CurrentTaskGroup->IsCollapsed)
 921             {
 922                 if (CurrentTaskGroup == TaskGroup)
 923                     return;
 924
 925                 /* FIXME */
 926             }
 927             else
 928             {
 929                 m_ActiveTaskItem = NULL;
 930                 if (CurrentTaskItem->Index >= 0)
 931                 {
 932                     UpdateTaskItemButton(CurrentTaskItem);
 933                 }
 934             }
 935         }
 936
 937         m_ActiveTaskItem = TaskItem;
 938
 939         if (TaskItem != NULL && TaskItem->Index >= 0)
 940         {
 941             UpdateTaskItemButton(TaskItem);
 942         }
 943         else if (TaskItem == NULL)
 944         {
 945             TRACE("Active TaskItem now NULL\n");
 946         }
 947     }
 948
 949     PTASK_ITEM FindTaskItemByIndex(IN INT Index)
 950     {
 951         PTASK_ITEM TaskItem, LastItem;
 952
 953         TaskItem = m_TaskItems;
 954         LastItem = TaskItem + m_TaskItemCount;
 955         while (TaskItem != LastItem)
 956         {
 957             if (TaskItem->Index == Index)
 958                 return TaskItem;
 959
 960             TaskItem++;
 961         }
 962
 963         return NULL;
 964     }
 965
 966     PTASK_GROUP FindTaskGroupByIndex(IN INT Index)
 967     {
 968         PTASK_GROUP CurrentGroup;
 969
 970         CurrentGroup = m_TaskGroups;
 971         while (CurrentGroup != NULL)
 972         {
 973             if (CurrentGroup->Index == Index)
 974                 break;
 975
 976             CurrentGroup = CurrentGroup->Next;
 977         }
 978
 979         return CurrentGroup;
 980     }
 981
 982     BOOL AddTask(IN HWND hWnd)
 983     {
 984         PTASK_ITEM TaskItem;
 985
 986         if (!::IsWindow(hWnd) || m_Tray->IsSpecialHWND(hWnd))
 987             return FALSE;
 988
 989         TaskItem = FindTaskItem(hWnd);
 990         if (TaskItem == NULL)
 991         {
 992             TRACE("Add window 0x%p\n", hWnd);
 993             TaskItem = AllocTaskItem();
 994             if (TaskItem != NULL)
 995             {
 996                 ZeroMemory(TaskItem, sizeof(*TaskItem));
 997                 TaskItem->hWnd = hWnd;
 998                 TaskItem->Index = -1;
 999                 TaskItem->Group = AddToTaskGroup(hWnd);
1000
1001                 if (!m_IsDestroying)
1002                 {
1003                     AddTaskItemButton(TaskItem);
1004                 }
1005             }
1006         }
1007
1008         return TaskItem != NULL;
1009     }
1010
1011     BOOL ActivateTaskItem(IN OUT PTASK_ITEM TaskItem  OPTIONAL)
1012     {
1013         if (TaskItem != NULL)
1014         {
1015             TRACE("Activate window 0x%p on button %d\n", TaskItem->hWnd, TaskItem->Index);
1016         }
1017
1018         CheckActivateTaskItem(TaskItem);
1019
1020         return FALSE;
1021     }
1022
1023     BOOL ActivateTask(IN HWND hWnd)
1024     {
1025         PTASK_ITEM TaskItem;
1026
1027         if (!hWnd)
1028         {
1029             return ActivateTaskItem(NULL);
1030         }
1031
1032         TaskItem = FindTaskItem(hWnd);
1033         if (TaskItem == NULL)
1034         {
1035             TaskItem = FindOtherTaskItem(hWnd);
1036         }
1037
1038         if (TaskItem == NULL)
1039         {
1040             WARN("Activate window 0x%p, could not find task\n", hWnd);
1041             RefreshWindowList();
1042         }
1043
1044         return ActivateTaskItem(TaskItem);
1045     }
1046
1047     BOOL DeleteTask(IN HWND hWnd)
1048     {
1049         PTASK_ITEM TaskItem;
1050
1051         TaskItem = FindTaskItem(hWnd);
1052         if (TaskItem != NULL)
1053         {
1054             TRACE("Delete window 0x%p on button %d\n", hWnd, TaskItem->Index);
1055             DeleteTaskItem(TaskItem);
1056             return TRUE;
1057         }
1058         //else
1059         //TRACE("Failed to delete window 0x%p\n", hWnd);
1060
1061         return FALSE;
1062     }
1063
1064     VOID DeleteAllTasks()
1065     {
1066         PTASK_ITEM CurrentTask;
1067
1068         if (m_TaskItemCount > 0)
1069         {
1070             CurrentTask = m_TaskItems + m_TaskItemCount;
1071             do
1072             {
1073                 DeleteTaskItem(--CurrentTask);
1074             } while (CurrentTask != m_TaskItems);
1075         }
1076     }
1077
1078     VOID FlashTaskItem(IN OUT PTASK_ITEM TaskItem)
1079     {
1080         TaskItem->RenderFlashed = 1;
1081         UpdateTaskItemButton(TaskItem);
1082     }
1083
1084     BOOL FlashTask(IN HWND hWnd)
1085     {
1086         PTASK_ITEM TaskItem;
1087
1088         TaskItem = FindTaskItem(hWnd);
1089         if (TaskItem != NULL)
1090         {
1091             TRACE("Flashing window 0x%p on button %d\n", hWnd, TaskItem->Index);
1092             FlashTaskItem(TaskItem);
1093             return TRUE;
1094         }
1095
1096         return FALSE;
1097     }
1098
1099     VOID RedrawTaskItem(IN OUT PTASK_ITEM TaskItem)
1100     {
1101         PTASK_GROUP TaskGroup;
1102
1103         TaskGroup = TaskItem->Group;
1104         if (m_IsGroupingEnabled && TaskGroup != NULL)
1105         {
1106             if (TaskGroup->IsCollapsed && TaskGroup->Index >= 0)
1107             {
1108                 UpdateTaskGroupButton(TaskGroup);
1109             }
1110             else if (TaskItem->Index >= 0)
1111             {
1112                 goto UpdateTaskItem;
1113             }
1114         }
1115         else if (TaskItem->Index >= 0)
1116         {
1117         UpdateTaskItem:
1118             TaskItem->RenderFlashed = 0;
1119             UpdateTaskItemButton(TaskItem);
1120         }
1121     }
1122
1123
1124     BOOL RedrawTask(IN HWND hWnd)
1125     {
1126         PTASK_ITEM TaskItem;
1127
1128         TaskItem = FindTaskItem(hWnd);
1129         if (TaskItem != NULL)
1130         {
1131             RedrawTaskItem(TaskItem);
1132             return TRUE;
1133         }
1134
1135         return FALSE;
1136     }
1137
1138     VOID UpdateButtonsSize(IN BOOL bRedrawDisabled)
1139     {
1140         RECT rcClient;
1141         UINT uiRows, uiMax, uiMin, uiBtnsPerLine, ui;
1142         LONG NewBtnSize;
1143         BOOL Horizontal;
1144
1145         int cx = GetSystemMetrics(SM_CXMINIMIZED);
1146         int cy = m_ButtonSize.cy = GetSystemMetrics(SM_CYSIZE);
1147         m_TaskBar.SetButtonSize(cx, cy);
1148
1149         if (GetClientRect(&rcClient) && !IsRectEmpty(&rcClient))
1150         {
1151             if (m_ButtonCount > 0)
1152             {
1153                 Horizontal = m_Tray->IsHorizontal();
1154
1155                 if (Horizontal)
1156                 {
1157                     TBMETRICS tbm = { 0 };
1158                     tbm.cbSize = sizeof(tbm);
1159                     tbm.dwMask = TBMF_BUTTONSPACING;
1160                     m_TaskBar.GetMetrics(&tbm);
1161
1162                     if (m_ButtonSize.cy + tbm.cyButtonSpacing != 0)
1163                         uiRows = (rcClient.bottom + tbm.cyButtonSpacing) / (m_ButtonSize.cy + tbm.cyButtonSpacing);
1164                     else
1165                         uiRows = 1;
1166
1167                     if (uiRows == 0)
1168                         uiRows = 1;
1169
1170                     uiBtnsPerLine = (m_ButtonCount + uiRows - 1) / uiRows;
1171                 }
1172                 else
1173                 {
1174                     uiBtnsPerLine = 1;
1175                     uiRows = m_ButtonCount;
1176                 }
1177
1178                 if (!bRedrawDisabled)
1179                     m_TaskBar.BeginUpdate();
1180
1181                 /* We might need to update the button spacing */
1182                 int cxButtonSpacing = m_TaskBar.UpdateTbButtonSpacing(
1183                     Horizontal, m_Theme != NULL,
1184                     uiRows, uiBtnsPerLine);
1185
1186                 /* Determine the minimum and maximum width of a button */
1187                 uiMin = GetSystemMetrics(SM_CXSIZE) + (2 * GetSystemMetrics(SM_CXEDGE));
1188                 if (Horizontal)
1189                 {
1190                     uiMax = GetSystemMetrics(SM_CXMINIMIZED);
1191
1192                     /* Calculate the ideal width and make sure it's within the allowed range */
1193                     NewBtnSize = (rcClient.right - (uiBtnsPerLine * cxButtonSpacing)) / uiBtnsPerLine;
1194
1195                     if (NewBtnSize < (LONG) uiMin)
1196                         NewBtnSize = uiMin;
1197                     if (NewBtnSize >(LONG)uiMax)
1198                         NewBtnSize = uiMax;
1199
1200                     /* Recalculate how many buttons actually fit into one line */
1201                     uiBtnsPerLine = rcClient.right / (NewBtnSize + cxButtonSpacing);
1202                     if (uiBtnsPerLine == 0)
1203                         uiBtnsPerLine++;
1204                 }
1205                 else
1206                 {
1207                     NewBtnSize = uiMax = rcClient.right;
1208                 }
1209
1210                 m_ButtonSize.cx = NewBtnSize;
1211
1212                 m_ButtonsPerLine = uiBtnsPerLine;
1213
1214                 for (ui = 0; ui != m_ButtonCount; ui++)
1215                 {
1216                     TBBUTTONINFOW tbbi = { 0 };
1217                     tbbi.cbSize = sizeof(tbbi);
1218                     tbbi.dwMask = TBIF_BYINDEX | TBIF_SIZE | TBIF_STATE;
1219                     tbbi.cx = (INT) NewBtnSize;
1220                     tbbi.fsState = TBSTATE_ENABLED;
1221
1222                     /* Check if we're updating a button that is the last one in the
1223                        line. If so, we need to set the TBSTATE_WRAP flag! */
1224                     if (Horizontal)
1225                     {
1226                         if ((ui + 1) % uiBtnsPerLine == 0)
1227                             tbbi.fsState |= TBSTATE_WRAP;
1228                     }
1229                     else
1230                     {
1231                         tbbi.fsState |= TBSTATE_WRAP;
1232                     }
1233
1234                     if (m_ActiveTaskItem != NULL &&
1235                         m_ActiveTaskItem->Index == (INT)ui)
1236                     {
1237                         tbbi.fsState |= TBSTATE_CHECKED;
1238                     }
1239
1240                     m_TaskBar.SetButtonInfo(ui, &tbbi);
1241                 }
1242             }
1243             else
1244             {
1245                 m_ButtonsPerLine = 0;
1246                 m_ButtonSize.cx = 0;
1247             }
1248         }
1249
1250         // FIXME: This seems to be enabling redraws prematurely, but moving it to its right place doesn't work!
1251         m_TaskBar.EndUpdate();
1252     }
1253
1254     BOOL CALLBACK EnumWindowsProc(IN HWND hWnd)
1255     {
1256         /* Only show windows that still exist and are visible and none of explorer's
1257         special windows (such as the desktop or the tray window) */
1258         if (::IsWindow(hWnd) && ::IsWindowVisible(hWnd) &&
1259             !m_Tray->IsSpecialHWND(hWnd))
1260         {
1261             DWORD exStyle = ::GetWindowLong(hWnd, GWL_EXSTYLE);
1262             /* Don't list popup windows and also no tool windows */
1263             if ((::GetWindow(hWnd, GW_OWNER) == NULL || exStyle & WS_EX_APPWINDOW) &&
1264                 !(exStyle & WS_EX_TOOLWINDOW))
1265             {
1266                 TRACE("Adding task for %p...\n", hWnd);
1267                 AddTask(hWnd);
1268             }
1269
1270         }
1271
1272         return TRUE;
1273     }
1274
1275     static BOOL CALLBACK s_EnumWindowsProc(IN HWND hWnd, IN LPARAM lParam)
1276     {
1277         CTaskSwitchWnd * This = (CTaskSwitchWnd *) lParam;
1278
1279         return This->EnumWindowsProc(hWnd);
1280     }
1281
1282     BOOL RefreshWindowList()
1283     {
1284         TRACE("Refreshing window list...\n");
1285         /* Add all windows to the toolbar */
1286         return EnumWindows(s_EnumWindowsProc, (LPARAM)this);
1287     }
1288
1289     LRESULT OnThemeChanged()
1290     {
1291         TRACE("OmThemeChanged\n");
1292
1293         if (m_Theme)
1294             CloseThemeData(m_Theme);
1295
1296         if (IsThemeActive())
1297             m_Theme = OpenThemeData(m_hWnd, L"TaskBand");
1298         else
1299             m_Theme = NULL;
1300
1301         return TRUE;
1302     }
1303
1304     LRESULT OnThemeChanged(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1305     {
1306         return OnThemeChanged();
1307     }
1308
1309     LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1310     {
1311         if (!m_TaskBar.Initialize(m_hWnd))
1312             return FALSE;
1313
1314         SetWindowTheme(m_TaskBar.m_hWnd, L"TaskBand", NULL);
1315         OnThemeChanged();
1316
1317         m_ImageList = ImageList_Create(16, 16, ILC_COLOR32 | ILC_MASK, 0, 1000);
1318         m_TaskBar.SetImageList(m_ImageList);
1319
1320         /* Set proper spacing between buttons */
1321         m_TaskBar.UpdateTbButtonSpacing(m_Tray->IsHorizontal(), m_Theme != NULL);
1322
1323         /* Register the shell hook */
1324         m_ShellHookMsg = RegisterWindowMessageW(L"SHELLHOOK");
1325
1326         TRACE("ShellHookMsg got assigned number %d\n", m_ShellHookMsg);
1327
1328         RegisterShellHook(m_hWnd, 3); /* 1 if no NT! We're targeting NT so we don't care! */
1329
1330         RefreshWindowList();
1331
1332         /* Recalculate the button size */
1333         UpdateButtonsSize(FALSE);
1334
1335 #if DUMP_TASKS != 0
1336         SetTimer(hwnd, 1, 5000, NULL);
1337 #endif
1338         return TRUE;
1339     }
1340
1341     LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1342     {
1343         m_IsDestroying = TRUE;
1344
1345         /* Unregister the shell hook */
1346         RegisterShellHook(m_hWnd, FALSE);
1347
1348         CloseThemeData(m_Theme);
1349         DeleteAllTasks();
1350         return TRUE;
1351     }
1352
1353     BOOL HandleAppCommand(IN WPARAM wParam, IN LPARAM lParam)
1354     {
1355         BOOL Ret = FALSE;
1356
1357         switch (GET_APPCOMMAND_LPARAM(lParam))
1358         {
1359         case APPCOMMAND_BROWSER_SEARCH:
1360             Ret = SHFindFiles(NULL,
1361                 NULL);
1362             break;
1363
1364         case APPCOMMAND_BROWSER_HOME:
1365         case APPCOMMAND_LAUNCH_MAIL:
1366         default:
1367             TRACE("Shell app command %d unhandled!\n", (INT) GET_APPCOMMAND_LPARAM(lParam));
1368             break;
1369         }
1370
1371         return Ret;
1372     }
1373
1374     LRESULT HandleShellHookMsg(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1375     {
1376         BOOL Ret = FALSE;
1377
1378         /* In case the shell hook wasn't registered properly, ignore WM_NULLs*/
1379         if (uMsg == 0)
1380         {
1381             bHandled = FALSE;
1382             return 0;
1383         }
1384
1385         TRACE("Received shell hook message: wParam=%08lx, lParam=%08lx\n", wParam, lParam);
1386
1387         switch ((INT) wParam)
1388         {
1389         case HSHELL_APPCOMMAND:
1390             Ret = HandleAppCommand(wParam, lParam);
1391             break;
1392
1393         case HSHELL_WINDOWCREATED:
1394             AddTask((HWND) lParam);
1395             break;
1396
1397         case HSHELL_WINDOWDESTROYED:
1398             /* The window still exists! Delay destroying it a bit */
1399             DeleteTask((HWND) lParam);
1400             break;
1401
1402         case HSHELL_RUDEAPPACTIVATED:
1403         case HSHELL_WINDOWACTIVATED:
1404             ActivateTask((HWND) lParam);
1405             break;
1406
1407         case HSHELL_FLASH:
1408             FlashTask((HWND) lParam);
1409             break;
1410
1411         case HSHELL_REDRAW:
1412             RedrawTask((HWND) lParam);
1413             break;
1414
1415         case HSHELL_TASKMAN:
1416             ::PostMessage(m_Tray->GetHWND(), TWM_OPENSTARTMENU, 0, 0);
1417             break;
1418
1419         case HSHELL_ACTIVATESHELLWINDOW:
1420         case HSHELL_LANGUAGE:
1421         case HSHELL_SYSMENU:
1422         case HSHELL_ENDTASK:
1423         case HSHELL_ACCESSIBILITYSTATE:
1424         case HSHELL_WINDOWREPLACED:
1425         case HSHELL_WINDOWREPLACING:
1426
1427         case HSHELL_GETMINRECT:
1428         default:
1429         {
1430 #if DEBUG_SHELL_HOOK
1431             int i, found;
1432             for (i = 0, found = 0; i != _countof(hshell_msg); i++)
1433             {
1434                 if (hshell_msg[i].msg == (INT) wParam)
1435                 {
1436                     TRACE("Shell message %ws unhandled (lParam = 0x%p)!\n", hshell_msg[i].msg_name, lParam);
1437                     found = 1;
1438                     break;
1439                 }
1440             }
1441             if (found)
1442                 break;
1443 #endif
1444             TRACE("Shell message %d unhandled (lParam = 0x%p)!\n", (INT) wParam, lParam);
1445             break;
1446         }
1447         }
1448
1449         return Ret;
1450     }
1451
1452     VOID EnableGrouping(IN BOOL bEnable)
1453     {
1454         m_IsGroupingEnabled = bEnable;
1455
1456         /* Collapse or expand groups if necessary */
1457         UpdateButtonsSize(FALSE);
1458     }
1459
1460     VOID HandleTaskItemClick(IN OUT PTASK_ITEM TaskItem)
1461     {
1462         BOOL bIsMinimized;
1463         BOOL bIsActive;
1464
1465         if (::IsWindow(TaskItem->hWnd))
1466         {
1467             bIsMinimized = ::IsIconic(TaskItem->hWnd);
1468             bIsActive = (TaskItem == m_ActiveTaskItem);
1469
1470             TRACE("Active TaskItem %p, selected TaskItem %p\n", m_ActiveTaskItem, TaskItem);
1471             if (m_ActiveTaskItem)
1472                 TRACE("Active TaskItem hWnd=%p, TaskItem hWnd %p\n", m_ActiveTaskItem->hWnd, TaskItem->hWnd);
1473
1474             TRACE("Valid button clicked. HWND=%p, IsMinimized=%s, IsActive=%s...\n",
1475                 TaskItem->hWnd, bIsMinimized ? "Yes" : "No", bIsActive ? "Yes" : "No");
1476
1477             if (!bIsMinimized && bIsActive)
1478             {
1479                 ::PostMessage(TaskItem->hWnd,
1480                     WM_SYSCOMMAND,
1481                     SC_MINIMIZE,
1482                     0);
1483                 TRACE("Valid button clicked. App window Minimized.\n");
1484             }
1485             else
1486             {
1487                 if (bIsMinimized)
1488                 {
1489                     ::PostMessage(TaskItem->hWnd,
1490                         WM_SYSCOMMAND,
1491                         SC_RESTORE,
1492                         0);
1493                     TRACE("Valid button clicked. App window Restored.\n");
1494                 }
1495
1496                 SetForegroundWindow(TaskItem->hWnd);
1497                 TRACE("Valid button clicked. App window Activated.\n");
1498             }
1499         }
1500     }
1501
1502     VOID HandleTaskGroupClick(IN OUT PTASK_GROUP TaskGroup)
1503     {
1504         /* TODO: Show task group menu */
1505     }
1506
1507     BOOL HandleButtonClick(IN WORD wIndex)
1508     {
1509         PTASK_ITEM TaskItem;
1510         PTASK_GROUP TaskGroup;
1511
1512         if (m_IsGroupingEnabled)
1513         {
1514             TaskGroup = FindTaskGroupByIndex((INT) wIndex);
1515             if (TaskGroup != NULL && TaskGroup->IsCollapsed)
1516             {
1517                 HandleTaskGroupClick(TaskGroup);
1518                 return TRUE;
1519             }
1520         }
1521
1522         TaskItem = FindTaskItemByIndex((INT) wIndex);
1523         if (TaskItem != NULL)
1524         {
1525             HandleTaskItemClick(TaskItem);
1526             return TRUE;
1527         }
1528
1529         return FALSE;
1530     }
1531
1532
1533     VOID HandleTaskItemRightClick(IN OUT PTASK_ITEM TaskItem)
1534     {
1535         POINT pt;
1536         GetCursorPos(&pt);
1537
1538         SetForegroundWindow(TaskItem->hWnd);
1539
1540         ActivateTask(TaskItem->hWnd);
1541
1542         ::SendMessageW(TaskItem->hWnd, WM_POPUPSYSTEMMENU, 0, MAKELPARAM(pt.x, pt.y));
1543     }
1544
1545     VOID HandleTaskGroupRightClick(IN OUT PTASK_GROUP TaskGroup)
1546     {
1547         /* TODO: Show task group right click menu */
1548     }
1549
1550     BOOL HandleButtonRightClick(IN WORD wIndex)
1551     {
1552         PTASK_ITEM TaskItem;
1553         PTASK_GROUP TaskGroup;
1554         if (m_IsGroupingEnabled)
1555         {
1556             TaskGroup = FindTaskGroupByIndex((INT) wIndex);
1557             if (TaskGroup != NULL && TaskGroup->IsCollapsed)
1558             {
1559                 HandleTaskGroupRightClick(TaskGroup);
1560                 return TRUE;
1561             }
1562         }
1563
1564         TaskItem = FindTaskItemByIndex((INT) wIndex);
1565
1566         if (TaskItem != NULL)
1567         {
1568             HandleTaskItemRightClick(TaskItem);
1569             return TRUE;
1570         }
1571
1572         return FALSE;
1573     }
1574
1575
1576     LRESULT HandleItemPaint(IN OUT NMTBCUSTOMDRAW *nmtbcd)
1577     {
1578         LRESULT Ret = CDRF_DODEFAULT;
1579         PTASK_GROUP TaskGroup;
1580         PTASK_ITEM TaskItem;
1581
1582         TaskItem = FindTaskItemByIndex((INT) nmtbcd->nmcd.dwItemSpec);
1583         TaskGroup = FindTaskGroupByIndex((INT) nmtbcd->nmcd.dwItemSpec);
1584         if (TaskGroup == NULL && TaskItem != NULL)
1585         {
1586             ASSERT(TaskItem != NULL);
1587
1588             if (TaskItem != NULL && ::IsWindow(TaskItem->hWnd))
1589             {
1590                 /* Make the entire button flashing if necessary */
1591                 if (nmtbcd->nmcd.uItemState & CDIS_MARKED)
1592                 {
1593                     Ret = TBCDRF_NOBACKGROUND;
1594                     if (!m_Theme)
1595                     {
1596                         SelectObject(nmtbcd->nmcd.hdc, GetSysColorBrush(COLOR_HIGHLIGHT));
1597                         Rectangle(nmtbcd->nmcd.hdc,
1598                             nmtbcd->nmcd.rc.left,
1599                             nmtbcd->nmcd.rc.top,
1600                             nmtbcd->nmcd.rc.right,
1601                             nmtbcd->nmcd.rc.bottom);
1602                     }
1603                     else
1604                     {
1605                         DrawThemeBackground(m_Theme, nmtbcd->nmcd.hdc, TDP_FLASHBUTTON, 0, &nmtbcd->nmcd.rc, 0);
1606                     }
1607                     nmtbcd->clrText = GetSysColor(COLOR_HIGHLIGHTTEXT);
1608                     return Ret;
1609                 }
1610             }
1611         }
1612         else if (TaskGroup != NULL)
1613         {
1614             /* FIXME: Implement painting for task groups */
1615         }
1616         return Ret;
1617     }
1618
1619     LRESULT HandleToolbarNotification(IN const NMHDR *nmh)
1620     {
1621         LRESULT Ret = 0;
1622
1623         switch (nmh->code)
1624         {
1625         case NM_CUSTOMDRAW:
1626         {
1627             LPNMTBCUSTOMDRAW nmtbcd = (LPNMTBCUSTOMDRAW) nmh;
1628
1629             switch (nmtbcd->nmcd.dwDrawStage)
1630             {
1631
1632             case CDDS_ITEMPREPAINT:
1633                 Ret = HandleItemPaint(nmtbcd);
1634                 break;
1635
1636             case CDDS_PREPAINT:
1637                 Ret = CDRF_NOTIFYITEMDRAW;
1638                 break;
1639
1640             default:
1641                 Ret = CDRF_DODEFAULT;
1642                 break;
1643             }
1644             break;
1645         }
1646         }
1647
1648         return Ret;
1649     }
1650
1651     LRESULT DrawBackground(HDC hdc)
1652     {
1653         RECT rect;
1654
1655         GetClientRect(&rect);
1656         DrawThemeParentBackground(m_hWnd, hdc, &rect);
1657
1658         return TRUE;
1659     }
1660
1661     LRESULT OnEraseBackground(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1662     {
1663         HDC hdc = (HDC) wParam;
1664
1665         if (!IsAppThemed())
1666         {
1667             bHandled = FALSE;
1668             return 0;
1669         }
1670
1671         return DrawBackground(hdc);
1672     }
1673
1674     LRESULT OnSize(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1675     {
1676         SIZE szClient;
1677
1678         szClient.cx = LOWORD(lParam);
1679         szClient.cy = HIWORD(lParam);
1680         if (m_TaskBar.m_hWnd != NULL)
1681         {
1682             m_TaskBar.SetWindowPos(NULL, 0, 0, szClient.cx, szClient.cy, SWP_NOZORDER);
1683
1684             UpdateButtonsSize(FALSE);
1685         }
1686         return TRUE;
1687     }
1688
1689     LRESULT OnNcHitTest(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1690     {
1691         LRESULT Ret = TRUE;
1692         /* We want the tray window to be draggable everywhere, so make the control
1693         appear transparent */
1694         Ret = DefWindowProc(uMsg, wParam, lParam);
1695         if (Ret != HTVSCROLL && Ret != HTHSCROLL)
1696             Ret = HTTRANSPARENT;
1697         return Ret;
1698     }
1699
1700     LRESULT OnCommand(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1701     {
1702         LRESULT Ret = TRUE;
1703         if (lParam != 0 && (HWND) lParam == m_TaskBar.m_hWnd)
1704         {
1705             HandleButtonClick(LOWORD(wParam));
1706         }
1707         return Ret;
1708     }
1709
1710     LRESULT OnNotify(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1711     {
1712         LRESULT Ret = TRUE;
1713         const NMHDR *nmh = (const NMHDR *) lParam;
1714
1715         if (nmh->hwndFrom == m_TaskBar.m_hWnd)
1716         {
1717             Ret = HandleToolbarNotification(nmh);
1718         }
1719         return Ret;
1720     }
1721
1722     LRESULT OnEnableGrouping(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1723     {
1724         LRESULT Ret = m_IsGroupingEnabled;
1725         if ((BOOL)wParam != m_IsGroupingEnabled)
1726         {
1727             EnableGrouping((BOOL) wParam);
1728         }
1729         return Ret;
1730     }
1731
1732     LRESULT OnUpdateTaskbarPos(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1733     {
1734         /* Update the button spacing */
1735         m_TaskBar.UpdateTbButtonSpacing(m_Tray->IsHorizontal(), m_Theme != NULL);
1736         return TRUE;
1737     }
1738
1739     LRESULT OnContextMenu(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1740     {
1741         LRESULT Ret = 0;
1742         INT_PTR iBtn = -1;
1743
1744         if (m_TaskBar.m_hWnd != NULL)
1745         {
1746             POINT pt;
1747
1748             pt.x = GET_X_LPARAM(lParam);
1749             pt.y = GET_Y_LPARAM(lParam);
1750
1751             ::ScreenToClient(m_TaskBar.m_hWnd, &pt);
1752
1753             iBtn = m_TaskBar.HitTest(&pt);
1754             if (iBtn >= 0)
1755             {
1756                 HandleButtonRightClick(iBtn);
1757             }
1758         }
1759         if (iBtn < 0)
1760         {
1761             /* Not on a taskbar button, so forward message to tray */
1762             Ret = SendMessage(m_Tray->GetHWND(), uMsg, wParam, lParam);
1763         }
1764         return Ret;
1765     }
1766
1767     LRESULT OnKludgeItemRect(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1768     {
1769         PTASK_ITEM TaskItem = FindTaskItem((HWND) wParam);
1770         if (TaskItem)
1771         {
1772             RECT* prcMinRect = (RECT*) lParam;
1773             RECT rcItem, rcToolbar;
1774             m_TaskBar.GetItemRect(TaskItem->Index, &rcItem);
1775             m_TaskBar.GetWindowRect(&rcToolbar);
1776
1777             OffsetRect(&rcItem, rcToolbar.left, rcToolbar.top);
1778
1779             *prcMinRect = rcItem;
1780             return TRUE;
1781         }
1782         return FALSE;
1783     }
1784
1785     LRESULT OnMouseActivate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1786     {
1787         return MA_NOACTIVATE;
1788     }
1789
1790     LRESULT OnTimer(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1791     {
1792 #if DUMP_TASKS != 0
1793         switch (wParam)
1794         {
1795         case 1:
1796             DumpTasks();
1797             break;
1798         }
1799 #endif
1800         return TRUE;
1801     }
1802
1803     LRESULT OnSetFont(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1804     {
1805         return m_TaskBar.SendMessageW(uMsg, wParam, lParam);
1806     }
1807
1808     LRESULT OnSettingChanged(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
1809     {
1810         if (wParam == SPI_SETNONCLIENTMETRICS)
1811         {
1812             /*  Don't update the font, this will be done when we get a WM_SETFONT from our parent */
1813             UpdateButtonsSize(FALSE);
1814         }
1815
1816         return 0;
1817     }
1818
1819     DECLARE_WND_CLASS_EX(szTaskSwitchWndClass, CS_DBLCLKS, COLOR_3DFACE)
1820
1821     BEGIN_MSG_MAP(CTaskSwitchWnd)
1822         MESSAGE_HANDLER(WM_THEMECHANGED, OnThemeChanged)
1823         MESSAGE_HANDLER(WM_ERASEBKGND, OnEraseBackground)
1824         MESSAGE_HANDLER(WM_SIZE, OnSize)
1825         MESSAGE_HANDLER(WM_CREATE, OnCreate)
1826         MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
1827         MESSAGE_HANDLER(WM_NCHITTEST, OnNcHitTest)
1828         MESSAGE_HANDLER(WM_COMMAND, OnCommand)
1829         MESSAGE_HANDLER(WM_NOTIFY, OnNotify)
1830         MESSAGE_HANDLER(TSWM_ENABLEGROUPING, OnEnableGrouping)
1831         MESSAGE_HANDLER(TSWM_UPDATETASKBARPOS, OnUpdateTaskbarPos)
1832         MESSAGE_HANDLER(WM_CONTEXTMENU, OnContextMenu)
1833         MESSAGE_HANDLER(WM_TIMER, OnTimer)
1834         MESSAGE_HANDLER(WM_SETFONT, OnSetFont)
1835         MESSAGE_HANDLER(WM_SETTINGCHANGE, OnSettingChanged)
1836         MESSAGE_HANDLER(m_ShellHookMsg, HandleShellHookMsg)
1837         MESSAGE_HANDLER(WM_MOUSEACTIVATE, OnMouseActivate)
1838         MESSAGE_HANDLER(WM_KLUDGEMINRECT, OnKludgeItemRect)
1839     END_MSG_MAP()
1840
1841     HWND _Init(IN HWND hWndParent, IN OUT ITrayWindow *tray)
1842     {
1843         m_Tray = tray;
1844         m_IsGroupingEnabled = TRUE; /* FIXME */
1845         return Create(hWndParent, 0, szRunningApps, WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_TABSTOP);
1846     }
1847 };
1848
1849 HWND
1850 CreateTaskSwitchWnd(IN HWND hWndParent, IN OUT ITrayWindow *Tray)
1851 {
1852     CTaskSwitchWnd * instance;
1853
1854     // TODO: Destroy after the window is destroyed
1855     instance = new CTaskSwitchWnd();
1856
1857     return instance->_Init(hWndParent, Tray);
1858 }