1 /* 2 * Copyright 2004-2009, Axel Dörfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 */ 5 6 7 #include "DataView.h" 8 #include "DataEditor.h" 9 10 #include <stdio.h> 11 #include <stdlib.h> 12 13 #include <Window.h> 14 #include <ScrollBar.h> 15 #include <Autolock.h> 16 #include <Clipboard.h> 17 #include <Mime.h> 18 #include <Beep.h> 19 20 21 #ifndef __HAIKU__ 22 typedef uint32 addr_t; 23 #endif 24 25 static const uint32 kBlockSize = 16; 26 static const uint32 kHorizontalSpace = 8; 27 static const uint32 kVerticalSpace = 4; 28 29 static const uint32 kBlockSpace = 3; 30 static const uint32 kHexByteWidth = 3; 31 // these are determined by the implementation of DataView::ConvertLine() 32 33 34 /*! This function checks if the buffer contains a valid UTF-8 35 string, following the convention from the DataView::ConvertLine() 36 method: everything that's not replaced by a '.' will be accepted. 37 */ 38 bool 39 is_valid_utf8(uint8 *data, size_t size) 40 { 41 for (size_t i = 0; i < size; i++) { 42 // accept a terminating null byte 43 if (i == size - 1 && data[0] == '\0') 44 return true; 45 46 if ((data[i] & 0x80) == 0) { 47 // a single byte character 48 if (data[i] < ' ' || data[i] == 0x7f) 49 return false; 50 51 continue; 52 } 53 54 if ((data[i] & 0xc0) == 0x80) { 55 // not a proper multibyte start 56 return false; 57 } 58 59 // start of a multibyte character 60 uint8 mask = 0x80; 61 uint32 result = (uint32)(data[i++] & 0xff); 62 63 while (result & mask) { 64 if (mask == 0x02) { 65 // seven byte char - invalid 66 return false; 67 } 68 69 result &= ~mask; 70 mask >>= 1; 71 } 72 73 while (i < size && (data[i] & 0xc0) == 0x80) { 74 result <<= 6; 75 result += data[i++] & 0x3f; 76 77 mask <<= 1; 78 if (mask == 0x40) 79 break; 80 } 81 82 if (mask != 0x40) { 83 // not enough bytes in multibyte char 84 return false; 85 } 86 } 87 88 return true; 89 } 90 91 92 // #pragma mark - 93 94 95 DataView::DataView(BRect rect, DataEditor &editor) 96 : BView(rect, "dataView", B_FOLLOW_ALL, B_WILL_DRAW | B_NAVIGABLE | B_FRAME_EVENTS), 97 fEditor(editor), 98 fFocus(kHexFocus), 99 fBase(kHexBase), 100 fIsActive(true), 101 fMouseSelectionStart(-1), 102 fKeySelectionStart(-1), 103 fBitPosition(0), 104 fFitFontSize(false), 105 fDragMessageSize(-1) 106 { 107 fPositionLength = 4; 108 fStart = fEnd = 0; 109 110 if (fEditor.Lock()) { 111 fDataSize = fEditor.ViewSize(); 112 fOffset = fEditor.ViewOffset(); 113 fEditor.Unlock(); 114 } else 115 fDataSize = 512; 116 fData = (uint8 *)malloc(fDataSize); 117 118 SetFontSize(12.0); 119 // also sets the fixed font 120 121 UpdateFromEditor(); 122 } 123 124 125 DataView::~DataView() 126 { 127 } 128 129 130 void 131 DataView::DetachedFromWindow() 132 { 133 fEditor.StopWatching(this); 134 } 135 136 137 void 138 DataView::AttachedToWindow() 139 { 140 fEditor.StartWatching(this); 141 MakeFocus(true); 142 // this seems to be necessary - if we don't do this here, 143 // the view is sometimes focus, but IsFocus() returns false... 144 } 145 146 147 void 148 DataView::UpdateFromEditor(BMessage *message) 149 { 150 if (fData == NULL) 151 return; 152 153 BAutolock locker(fEditor); 154 155 fFileSize = fEditor.FileSize(); 156 157 // get the range of the changes 158 159 int32 start = 0, end = fDataSize - 1; 160 off_t offset, size; 161 if (message != NULL 162 && message->FindInt64("offset", &offset) == B_OK 163 && message->FindInt64("size", &size) == B_OK) { 164 if (offset > fOffset + fDataSize 165 || offset + size < fOffset) { 166 // the changes are not within our scope, so we can ignore them 167 return; 168 } 169 170 if (offset > fOffset) 171 start = offset - fOffset; 172 if (offset + size < fOffset + fDataSize) 173 end = offset + size - fOffset; 174 } 175 176 if (fOffset + fDataSize > fFileSize) 177 fSizeInView = fFileSize - fOffset; 178 else 179 fSizeInView = fDataSize; 180 181 const uint8 *data; 182 if (fEditor.GetViewBuffer(&data) == B_OK) 183 // ToDo: copy only the relevant part 184 memcpy(fData, data, fDataSize); 185 186 InvalidateRange(start, end); 187 188 // we notify our selection listeners also if the 189 // data in the selection has changed 190 if (start <= fEnd && end >= fStart) { 191 BMessage update; 192 update.AddInt64("start", fStart); 193 update.AddInt64("end", fEnd); 194 SendNotices(kDataViewSelection, &update); 195 } 196 } 197 198 199 bool 200 DataView::AcceptsDrop(const BMessage *message) 201 { 202 return !fEditor.IsReadOnly() 203 && (message->HasData("text/plain", B_MIME_TYPE) 204 || message->HasData(B_FILE_MIME_TYPE, B_MIME_TYPE)); 205 } 206 207 208 void 209 DataView::MessageReceived(BMessage *message) 210 { 211 switch (message->what) { 212 case kMsgUpdateData: 213 case kMsgDataEditorUpdate: 214 UpdateFromEditor(message); 215 break; 216 217 case kMsgDataEditorParameterChange: 218 { 219 int32 viewSize; 220 off_t offset; 221 if (message->FindInt64("offset", &offset) == B_OK) { 222 fOffset = offset; 223 SetSelection(0, 0); 224 MakeVisible(0); 225 } 226 if (message->FindInt32("view_size", &viewSize) == B_OK) { 227 fDataSize = viewSize; 228 fData = (uint8 *)realloc(fData, fDataSize); 229 UpdateScroller(); 230 SendNotices(kDataViewPreferredSize); 231 } 232 if (message->FindInt64("file_size", &offset) == B_OK) 233 UpdateFromEditor(); 234 break; 235 } 236 237 case kMsgBaseType: 238 { 239 int32 type; 240 if (message->FindInt32("base", &type) != B_OK) 241 break; 242 243 SetBase((base_type)type); 244 break; 245 } 246 247 case kMsgSetSelection: 248 { 249 int64 start, end; 250 if (message->FindInt64("start", &start) != B_OK 251 || message->FindInt64("end", &end) != B_OK) 252 break; 253 254 SetSelection(start, end); 255 break; 256 } 257 258 case B_SELECT_ALL: 259 SetSelection(0, fDataSize - 1); 260 break; 261 262 case B_COPY: 263 Copy(); 264 break; 265 266 case B_PASTE: 267 Paste(); 268 break; 269 270 case B_UNDO: 271 fEditor.Undo(); 272 break; 273 274 case B_REDO: 275 fEditor.Redo(); 276 break; 277 278 case B_MIME_DATA: 279 if (AcceptsDrop(message)) { 280 const void *data; 281 ssize_t size; 282 if (message->FindData("text/plain", B_MIME_TYPE, &data, &size) == B_OK 283 || message->FindData(B_FILE_MIME_TYPE, B_MIME_TYPE, &data, &size) == B_OK) { 284 if (fEditor.Replace(fOffset + fStart, (const uint8 *)data, size) != B_OK) 285 SetSelection(fStoredStart, fStoredEnd); 286 287 fDragMessageSize = -1; 288 } 289 } 290 break; 291 292 default: 293 BView::MessageReceived(message); 294 } 295 } 296 297 298 void 299 DataView::Copy() 300 { 301 if (!be_clipboard->Lock()) 302 return; 303 304 be_clipboard->Clear(); 305 306 BMessage *clip; 307 if ((clip = be_clipboard->Data()) != NULL) { 308 uint8 *data = fData + fStart; 309 size_t length = fEnd + 1 - fStart; 310 311 clip->AddData(B_FILE_MIME_TYPE, B_MIME_TYPE, data, length); 312 313 if (is_valid_utf8(data, length)) 314 clip->AddData("text/plain", B_MIME_TYPE, data, length); 315 316 be_clipboard->Commit(); 317 } 318 319 be_clipboard->Unlock(); 320 } 321 322 323 void 324 DataView::Paste() 325 { 326 if (!be_clipboard->Lock()) 327 return; 328 329 const void *data; 330 ssize_t length; 331 BMessage *clip; 332 if ((clip = be_clipboard->Data()) != NULL 333 && (clip->FindData(B_FILE_MIME_TYPE, B_MIME_TYPE, &data, &length) == B_OK 334 || clip->FindData("text/plain", B_MIME_TYPE, &data, &length) == B_OK)) { 335 // we have valid data, but it could still be too 336 // large to to fit in the file 337 if (fOffset + fStart + length > fFileSize) 338 length = fFileSize - fOffset; 339 340 if (fEditor.Replace(fOffset + fStart, (const uint8 *)data, length) == B_OK) 341 SetSelection(fStart + length, fStart + length); 342 } else 343 beep(); 344 345 be_clipboard->Unlock(); 346 } 347 348 349 void 350 DataView::ConvertLine(char *line, off_t offset, const uint8 *buffer, size_t size) 351 { 352 if (size == 0) { 353 line[0] = '\0'; 354 return; 355 } 356 357 line += sprintf(line, fBase == kHexBase ? "%0*Lx: " : "%0*Ld: ", 358 (int)fPositionLength, offset); 359 360 for (uint32 i = 0; i < kBlockSize; i++) { 361 if (i >= size) { 362 strcpy(line, " "); 363 line += kHexByteWidth; 364 } else 365 line += sprintf(line, "%02x ", *(unsigned char *)(buffer + i)); 366 } 367 368 strcpy(line, " "); 369 line += 3; 370 371 for (uint32 i = 0; i < kBlockSize; i++) { 372 if (i < size) { 373 char c = buffer[i]; 374 375 if (c < ' ' || c == 0x7f) 376 *line++ = '.'; 377 else 378 *line++ = c; 379 } else 380 break; 381 } 382 383 *line = '\0'; 384 } 385 386 387 void 388 DataView::Draw(BRect updateRect) 389 { 390 if (fData == NULL || fFileSize == 0) 391 return; 392 393 // ToDo: take "updateRect" into account! 394 395 char line[255]; 396 BPoint location(kHorizontalSpace, kVerticalSpace + fAscent); 397 398 for (uint32 i = 0; i < fSizeInView; i += kBlockSize) { 399 ConvertLine(line, i, fData + i, fSizeInView - i); 400 DrawString(line, location); 401 402 location.y += fFontHeight; 403 } 404 405 DrawSelection(); 406 } 407 408 409 BRect 410 DataView::DataBounds(bool inView) const 411 { 412 return BRect(0, 0, 413 fCharWidth * (kBlockSize * 4 + fPositionLength + 6) + 2 * kHorizontalSpace, 414 fFontHeight * (((inView ? fSizeInView : fDataSize) + kBlockSize - 1) / kBlockSize) 415 + 2 * kVerticalSpace); 416 } 417 418 419 int32 420 DataView::PositionAt(view_focus focus, BPoint point, view_focus *_newFocus) 421 { 422 // clip the point into our data bounds 423 424 BRect bounds = DataBounds(true); 425 if (point.x < bounds.left) 426 point.x = bounds.left; 427 else if (point.x > bounds.right) 428 point.x = bounds.right; 429 430 if (point.y < bounds.top) 431 point.y = bounds.top; 432 else if (point.y >= bounds.bottom - kVerticalSpace) 433 point.y = bounds.bottom - kVerticalSpace - 1; 434 435 float left = fCharWidth * (fPositionLength + kBlockSpace) + kHorizontalSpace; 436 float hexWidth = fCharWidth * kBlockSize * kHexByteWidth; 437 float width = fCharWidth; 438 439 if (focus == kNoFocus) { 440 // find in which part the point is in 441 if (point.x < left - width / 2) 442 return -1; 443 444 if (point.x > left + hexWidth) 445 focus = kAsciiFocus; 446 else 447 focus = kHexFocus; 448 449 if (_newFocus) 450 *_newFocus = focus; 451 } 452 if (focus == kHexFocus) { 453 left -= width / 2; 454 width *= kHexByteWidth; 455 } else 456 left += hexWidth + (kBlockSpace * width); 457 458 int32 row = int32((point.y - kVerticalSpace) / fFontHeight); 459 int32 column = int32((point.x - left) / width); 460 if (column >= (int32)kBlockSize) 461 column = (int32)kBlockSize - 1; 462 else if (column < 0) 463 column = 0; 464 465 return row * kBlockSize + column; 466 } 467 468 469 BRect 470 DataView::SelectionFrame(view_focus which, int32 start, int32 end) 471 { 472 float spacing = 0; 473 float width = fCharWidth; 474 float byteWidth = fCharWidth; 475 float left; 476 477 if (which == kHexFocus) { 478 spacing = fCharWidth / 2; 479 left = width * (fPositionLength + kBlockSpace); 480 width *= kHexByteWidth; 481 byteWidth *= 2; 482 } else 483 left = width * (fPositionLength + 2 * kBlockSpace + kHexByteWidth * kBlockSize); 484 485 left += kHorizontalSpace; 486 float startInLine = (start % kBlockSize) * width; 487 float endInLine = (end % kBlockSize) * width + byteWidth - 1; 488 489 return BRect(left + startInLine - spacing, 490 kVerticalSpace + (start / kBlockSize) * fFontHeight, 491 left + endInLine + spacing, 492 kVerticalSpace + (end / kBlockSize + 1) * fFontHeight - 1); 493 } 494 495 496 void 497 DataView::DrawSelectionFrame(view_focus which) 498 { 499 if (fFileSize == 0) 500 return; 501 502 bool drawBlock = false; 503 bool drawLastLine = false; 504 BRect block, lastLine; 505 int32 spacing = 0; 506 if (which == kAsciiFocus) 507 spacing++; 508 509 // draw first line 510 511 int32 start = fStart % kBlockSize; 512 int32 first = (fStart / kBlockSize) * kBlockSize; 513 514 int32 end = fEnd; 515 if (end > first + (int32)kBlockSize - 1) 516 end = first + kBlockSize - 1; 517 518 BRect firstLine = SelectionFrame(which, first + start, end); 519 firstLine.right += spacing; 520 first += kBlockSize; 521 522 // draw block (and last line) if necessary 523 524 end = fEnd % kBlockSize; 525 int32 last = (fEnd / kBlockSize) * kBlockSize; 526 527 if (last >= first) { 528 if (end == kBlockSize - 1) 529 last += kBlockSize; 530 if (last > first) { 531 block = SelectionFrame(which, first, last - 1); 532 block.right += spacing; 533 drawBlock = true; 534 } 535 if (end != kBlockSize - 1) { 536 lastLine = SelectionFrame(which, last, last + end); 537 lastLine.right += spacing; 538 drawLastLine = true; 539 } 540 } 541 542 SetDrawingMode(B_OP_INVERT); 543 BeginLineArray(8); 544 545 // +******* 546 // | * 547 // +------+ 548 549 const rgb_color color = {0, 0, 0}; 550 float bottom; 551 if (drawBlock) 552 bottom = block.bottom; 553 else 554 bottom = firstLine.bottom; 555 556 AddLine(BPoint(firstLine.left + 1, firstLine.top), firstLine.RightTop(), color); 557 AddLine(BPoint(firstLine.right, firstLine.top + 1), BPoint(firstLine.right, bottom), color); 558 559 // *-------+ 560 // * | 561 // ********* 562 563 BRect rect; 564 if (start == 0 || !drawBlock && !drawLastLine) 565 rect = firstLine; 566 else if (drawBlock) 567 rect = block; 568 else 569 rect = lastLine; 570 571 if (drawBlock) 572 rect.bottom = block.bottom; 573 if (drawLastLine) { 574 rect.bottom = lastLine.bottom; 575 rect.right = lastLine.right; 576 } 577 rect.bottom++; 578 579 AddLine(rect.LeftTop(), rect.LeftBottom(), color); 580 AddLine(BPoint(rect.left + 1, rect.bottom), rect.RightBottom(), color); 581 582 // *--------+ 583 // * | 584 // +**** | 585 // | | 586 587 if (start && (drawLastLine || drawBlock)) { 588 AddLine(firstLine.LeftTop(), firstLine.LeftBottom(), color); 589 590 float right = firstLine.left; 591 if (!drawBlock && right > lastLine.right) 592 right = lastLine.right; 593 AddLine(BPoint(rect.left + 1, rect.top), BPoint(right, rect.top), color); 594 } 595 596 // | | 597 // | ***** 598 // | * 599 // +--------+ 600 601 if (drawLastLine) { 602 AddLine(lastLine.RightBottom(), BPoint(lastLine.right, lastLine.top + 1), color); 603 if (!drawBlock && lastLine.right <= firstLine.left) 604 lastLine.right = firstLine.left + (lastLine.right < firstLine.left ? 0 : 1); 605 AddLine(BPoint(lastLine.right, lastLine.top), BPoint(firstLine.right, lastLine.top), color); 606 } 607 608 EndLineArray(); 609 SetDrawingMode(B_OP_COPY); 610 } 611 612 613 void 614 DataView::DrawSelectionBlock(view_focus which, int32 blockStart, int32 blockEnd) 615 { 616 if (fFileSize == 0) 617 return; 618 619 // draw first line 620 621 SetDrawingMode(B_OP_INVERT); 622 623 int32 start = blockStart % kBlockSize; 624 int32 first = (blockStart / kBlockSize) * kBlockSize; 625 626 int32 end = blockEnd; 627 if (end > first + (int32)kBlockSize - 1) 628 end = first + kBlockSize - 1; 629 630 FillRect(SelectionFrame(which, first + start, end)); 631 first += kBlockSize; 632 633 // draw block (and last line) if necessary 634 635 end = blockEnd % kBlockSize; 636 int32 last = (blockEnd / kBlockSize) * kBlockSize; 637 638 if (last >= first) { 639 if (end == kBlockSize - 1) 640 last += kBlockSize; 641 642 if (last > first) 643 FillRect(SelectionFrame(which, first, last - 1)); 644 if (end != kBlockSize - 1) 645 FillRect(SelectionFrame(which, last, last + end)); 646 } 647 648 SetDrawingMode(B_OP_COPY); 649 } 650 651 652 void 653 DataView::DrawSelectionBlock(view_focus which) 654 { 655 DrawSelectionBlock(which, fStart, fEnd); 656 } 657 658 659 void 660 DataView::DrawSelection(bool frameOnly) 661 { 662 if (IsFocus() && fIsActive) { 663 if (!frameOnly) 664 DrawSelectionBlock(fFocus); 665 DrawSelectionFrame(fFocus == kHexFocus ? kAsciiFocus : kHexFocus); 666 } else { 667 DrawSelectionFrame(kHexFocus); 668 DrawSelectionFrame(kAsciiFocus); 669 } 670 } 671 672 673 void 674 DataView::SetSelection(int32 start, int32 end, view_focus focus) 675 { 676 // correct the values if necessary 677 678 if (start > end) { 679 int32 temp = start; 680 start = end; 681 end = temp; 682 } 683 684 if (start > (int32)fSizeInView - 1) 685 start = (int32)fSizeInView - 1; 686 if (start < 0) 687 start = 0; 688 689 if (end > (int32)fSizeInView - 1) 690 end = (int32)fSizeInView - 1; 691 if (end < 0) 692 end = 0; 693 694 if (fStart == start && fEnd == end) { 695 // nothing has changed, no need to update 696 return; 697 } 698 699 // notify our listeners 700 if (fStart != start) { 701 BMessage update; 702 update.AddInt64("position", start); 703 SendNotices(kDataViewCursorPosition, &update); 704 } 705 706 BMessage update; 707 update.AddInt64("start", start); 708 update.AddInt64("end", end); 709 SendNotices(kDataViewSelection, &update); 710 711 // Update selection - first, we need to remove the old selection, then 712 // we redraw the selection with the current values. 713 714 DrawSelection(focus == kNoFocus); 715 // From the block selection, only the parts that need updating are 716 // actually updated, if there is no focus change. 717 718 if (IsFocus() && fIsActive && focus == kNoFocus) { 719 // Update the selection block incrementally 720 721 if (start > fStart) { 722 // remove from the top 723 DrawSelectionBlock(fFocus, fStart, start - 1); 724 } else if (start < fStart) { 725 // add to the top 726 DrawSelectionBlock(fFocus, start, fStart - 1); 727 } 728 729 if (end < fEnd) { 730 // remove from bottom 731 DrawSelectionBlock(fFocus, end + 1, fEnd); 732 } else if (end > fEnd) { 733 // add to the bottom 734 DrawSelectionBlock(fFocus, fEnd + 1, end); 735 } 736 } 737 738 if (focus != kNoFocus) 739 fFocus = focus; 740 fStart = start; 741 fEnd = end; 742 743 DrawSelection(focus == kNoFocus); 744 745 fBitPosition = 0; 746 } 747 748 749 void 750 DataView::GetSelection(int32 &start, int32 &end) 751 { 752 start = fStart; 753 end = fEnd; 754 } 755 756 757 void 758 DataView::InvalidateRange(int32 start, int32 end) 759 { 760 if (start <= 0 && end >= int32(fDataSize) - 1) { 761 Invalidate(); 762 return; 763 } 764 765 int32 startLine = start / kBlockSize; 766 int32 endLine = end / kBlockSize; 767 768 if (endLine > startLine) { 769 start = startLine * kBlockSize; 770 end = (endLine + 1) * kBlockSize - 1; 771 } 772 773 // the part with focus 774 BRect rect = SelectionFrame(fFocus, start, end); 775 rect.bottom++; 776 rect.right++; 777 Invalidate(rect); 778 779 // the part without focus 780 rect = SelectionFrame(fFocus == kHexFocus ? kAsciiFocus : kHexFocus, start, end); 781 rect.bottom++; 782 rect.right++; 783 Invalidate(rect); 784 } 785 786 787 void 788 DataView::MakeVisible(int32 position) 789 { 790 if (position < 0 || position > int32(fDataSize) - 1) 791 return; 792 793 BRect frame = SelectionFrame(fFocus, position, position); 794 BRect bounds = Bounds(); 795 if (bounds.Contains(frame)) 796 return; 797 798 // special case the first and the last line and column, so that 799 // we can take kHorizontalSpace & kVerticalSpace into account 800 801 if ((position % kBlockSize) == 0) 802 frame.left -= kHorizontalSpace; 803 else if ((position % kBlockSize) == kBlockSize - 1) 804 frame.right += kHorizontalSpace; 805 806 if (position < int32(kBlockSize)) 807 frame.top -= kVerticalSpace; 808 else if (position > int32(fDataSize - kBlockSize)) 809 frame.bottom += kVerticalSpace; 810 811 // compute the scroll point 812 813 BPoint point = bounds.LeftTop(); 814 if (bounds.left > frame.left) 815 point.x = frame.left; 816 else if (bounds.right < frame.right) 817 point.x = frame.right - bounds.Width(); 818 819 if (bounds.top > frame.top) 820 point.y = frame.top; 821 else if (bounds.bottom < frame.bottom) 822 point.y = frame.bottom - bounds.Height(); 823 824 ScrollTo(point); 825 } 826 827 828 const uint8 * 829 DataView::DataAt(int32 start) 830 { 831 if (start < 0 || start >= int32(fSizeInView) || fData == NULL) 832 return NULL; 833 834 return fData + start; 835 } 836 837 838 void 839 DataView::SetBase(base_type type) 840 { 841 if (fBase == type) 842 return; 843 844 fBase = type; 845 Invalidate(); 846 } 847 848 849 void 850 DataView::SetFocus(view_focus which) 851 { 852 if (which == fFocus) 853 return; 854 855 DrawSelection(); 856 fFocus = which; 857 DrawSelection(); 858 } 859 860 861 void 862 DataView::SetActive(bool active) 863 { 864 if (active == fIsActive) 865 return; 866 867 fIsActive = active; 868 869 // only redraw the focussed part 870 871 if (IsFocus() && active) { 872 DrawSelectionFrame(fFocus); 873 DrawSelectionBlock(fFocus); 874 } else { 875 DrawSelectionBlock(fFocus); 876 DrawSelectionFrame(fFocus); 877 } 878 } 879 880 881 void 882 DataView::WindowActivated(bool active) 883 { 884 BView::WindowActivated(active); 885 SetActive(active); 886 } 887 888 889 void 890 DataView::MakeFocus(bool focus) 891 { 892 bool previous = IsFocus(); 893 BView::MakeFocus(focus); 894 895 if (focus == previous) 896 return; 897 898 if (Window()->IsActive() && focus) 899 SetActive(true); 900 else if (!Window()->IsActive() || !focus) 901 SetActive(false); 902 } 903 904 905 void 906 DataView::UpdateScroller() 907 { 908 float width, height; 909 GetPreferredSize(&width, &height); 910 911 BScrollBar *bar; 912 if ((bar = ScrollBar(B_HORIZONTAL)) != NULL) { 913 float delta = width - Bounds().Width(); 914 if (delta < 0) 915 delta = 0; 916 917 bar->SetRange(0, delta); 918 bar->SetSteps(fCharWidth, Bounds().Width()); 919 bar->SetProportion(Bounds().Width() / width); 920 } 921 if ((bar = ScrollBar(B_VERTICAL)) != NULL) { 922 float delta = height - Bounds().Height(); 923 if (delta < 0) 924 delta = 0; 925 926 bar->SetRange(0, delta); 927 bar->SetSteps(fFontHeight, Bounds().Height()); 928 bar->SetProportion(Bounds().Height() / height); 929 } 930 } 931 932 933 void 934 DataView::FrameResized(float width, float height) 935 { 936 if (fFitFontSize) { 937 // adapt the font size to fit in the view's bounds 938 float oldSize = FontSize(); 939 BFont font = be_fixed_font; 940 float steps = 0.5f; 941 942 float size; 943 for (size = 1.f; size < 100; size += steps) { 944 font.SetSize(size); 945 float charWidth = font.StringWidth("w"); 946 if (charWidth * (kBlockSize * 4 + fPositionLength + 6) + 2 * kHorizontalSpace > width) 947 break; 948 949 if (size > 6) 950 steps = 1.0f; 951 } 952 size -= steps; 953 font.SetSize(size); 954 955 if (oldSize != size) { 956 SetFont(&font); 957 Invalidate(); 958 } 959 } 960 961 UpdateScroller(); 962 } 963 964 965 void 966 DataView::InitiateDrag(view_focus focus) 967 { 968 BMessage *drag = new BMessage(B_MIME_DATA); 969 970 // Add originator and action 971 drag->AddPointer("be:originator", this); 972 //drag->AddString("be:clip_name", "Byte Clipping"); 973 //drag->AddInt32("be_actions", B_TRASH_TARGET); 974 975 // Add data (just like in Copy()) 976 uint8 *data = fData + fStart; 977 size_t length = fEnd + 1 - fStart; 978 979 drag->AddData(B_FILE_MIME_TYPE, B_MIME_TYPE, data, length); 980 if (is_valid_utf8(data, length)) 981 drag->AddData("text/plain", B_MIME_TYPE, data, length); 982 983 // get a frame that contains the whole selection - SelectionFrame() 984 // only spans a rectangle between the start and the end point, so 985 // we have to pass it the correct input values 986 987 BRect frame; 988 const int32 width = kBlockSize - 1; 989 int32 first = fStart & ~width; 990 int32 last = ((fEnd + width) & ~width) - 1; 991 if (first == (last & ~width)) 992 frame = SelectionFrame(focus, fStart, fEnd); 993 else 994 frame = SelectionFrame(focus, first, last); 995 996 BRect bounds = Bounds(); 997 if (!bounds.Contains(frame)) 998 frame = bounds & frame; 999 1000 DragMessage(drag, frame, NULL); 1001 1002 fStoredStart = fStart; 1003 fStoredEnd = fEnd; 1004 fDragMessageSize = length; 1005 } 1006 1007 1008 void 1009 DataView::MouseDown(BPoint where) 1010 { 1011 MakeFocus(true); 1012 1013 BMessage *message = Looper()->CurrentMessage(); 1014 int32 buttons; 1015 if (message == NULL || message->FindInt32("buttons", &buttons) != B_OK) 1016 return; 1017 1018 view_focus newFocus; 1019 int32 position = PositionAt(kNoFocus, where, &newFocus); 1020 1021 if ((buttons & B_SECONDARY_MOUSE_BUTTON) != 0 1022 && position >= fStart && position <= fEnd) { 1023 InitiateDrag(newFocus); 1024 return; 1025 } 1026 1027 if ((buttons & B_PRIMARY_MOUSE_BUTTON) == 0) 1028 return; 1029 1030 int32 modifiers = message->FindInt32("modifiers"); 1031 1032 fMouseSelectionStart = position; 1033 if (fMouseSelectionStart == -1) { 1034 // "where" is outside the valid frame 1035 return; 1036 } 1037 1038 int32 selectionEnd = fMouseSelectionStart; 1039 if (modifiers & B_SHIFT_KEY) { 1040 // enlarge the current selection 1041 if (fStart < selectionEnd) 1042 fMouseSelectionStart = fStart; 1043 else if (fEnd > selectionEnd) 1044 fMouseSelectionStart = fEnd; 1045 } 1046 SetSelection(fMouseSelectionStart, selectionEnd, newFocus); 1047 1048 SetMouseEventMask(B_POINTER_EVENTS, 1049 B_NO_POINTER_HISTORY | B_SUSPEND_VIEW_FOCUS | B_LOCK_WINDOW_FOCUS); 1050 } 1051 1052 1053 void 1054 DataView::MouseMoved(BPoint where, uint32 transit, const BMessage *dragMessage) 1055 { 1056 if (transit == B_EXITED_VIEW && fDragMessageSize > 0) { 1057 SetSelection(fStoredStart, fStoredEnd); 1058 fDragMessageSize = -1; 1059 } 1060 1061 if (dragMessage && AcceptsDrop(dragMessage)) { 1062 // handle drag message and tracking 1063 1064 if (transit == B_ENTERED_VIEW) { 1065 fStoredStart = fStart; 1066 fStoredEnd = fEnd; 1067 1068 const void *data; 1069 ssize_t size; 1070 if (dragMessage->FindData("text/plain", B_MIME_TYPE, &data, &size) == B_OK 1071 || dragMessage->FindData("text/plain", B_MIME_TYPE, &data, &size) == B_OK) 1072 fDragMessageSize = size; 1073 } else if (fDragMessageSize > 0) { 1074 view_focus newFocus; 1075 int32 start = PositionAt(kNoFocus, where, &newFocus); 1076 int32 end = start + fDragMessageSize - 1; 1077 1078 SetSelection(start, end); 1079 MakeVisible(start); 1080 } 1081 return; 1082 } 1083 1084 if (fMouseSelectionStart == -1) 1085 return; 1086 1087 int32 end = PositionAt(fFocus, where); 1088 if (end == -1) 1089 return; 1090 1091 SetSelection(fMouseSelectionStart, end); 1092 MakeVisible(end); 1093 } 1094 1095 1096 void 1097 DataView::MouseUp(BPoint where) 1098 { 1099 fMouseSelectionStart = fKeySelectionStart = -1; 1100 } 1101 1102 1103 void 1104 DataView::KeyDown(const char *bytes, int32 numBytes) 1105 { 1106 int32 modifiers; 1107 if (Looper()->CurrentMessage() == NULL 1108 || Looper()->CurrentMessage()->FindInt32("modifiers", &modifiers) != B_OK) 1109 modifiers = ::modifiers(); 1110 1111 // check if the selection is going to be changed 1112 switch (bytes[0]) { 1113 case B_LEFT_ARROW: 1114 case B_RIGHT_ARROW: 1115 case B_UP_ARROW: 1116 case B_DOWN_ARROW: 1117 if (modifiers & B_SHIFT_KEY) { 1118 if (fKeySelectionStart == -1) 1119 fKeySelectionStart = fStart; 1120 } else 1121 fKeySelectionStart = -1; 1122 break; 1123 } 1124 1125 switch (bytes[0]) { 1126 case B_LEFT_ARROW: 1127 { 1128 int32 position = fStart - 1; 1129 1130 if (modifiers & B_SHIFT_KEY) { 1131 if (fKeySelectionStart == fEnd) 1132 SetSelection(fStart - 1, fEnd); 1133 else { 1134 SetSelection(fStart, fEnd - 1); 1135 position = fEnd; 1136 } 1137 } else 1138 SetSelection(fStart - 1, fStart - 1); 1139 1140 MakeVisible(position); 1141 break; 1142 } 1143 case B_RIGHT_ARROW: 1144 { 1145 int32 position = fEnd + 1; 1146 1147 if (modifiers & B_SHIFT_KEY) { 1148 if (fKeySelectionStart == fStart) 1149 SetSelection(fStart, fEnd + 1); 1150 else 1151 SetSelection(fStart + 1, fEnd); 1152 } else 1153 SetSelection(fEnd + 1, fEnd + 1); 1154 1155 MakeVisible(position); 1156 break; 1157 } 1158 case B_UP_ARROW: 1159 { 1160 int32 start, end; 1161 if (modifiers & B_SHIFT_KEY) { 1162 if (fKeySelectionStart == fStart) { 1163 start = fEnd - int32(kBlockSize); 1164 end = fStart; 1165 } else { 1166 start = fStart - int32(kBlockSize); 1167 end = fEnd; 1168 } 1169 if (start < 0) 1170 start = 0; 1171 } else { 1172 start = fStart - int32(kBlockSize); 1173 if (start < 0) 1174 start = fStart; 1175 1176 end = start; 1177 } 1178 1179 SetSelection(start, end); 1180 MakeVisible(start); 1181 break; 1182 } 1183 case B_DOWN_ARROW: 1184 { 1185 int32 start, end; 1186 if (modifiers & B_SHIFT_KEY) { 1187 if (fKeySelectionStart == fEnd) { 1188 start = fEnd; 1189 end = fStart + int32(kBlockSize); 1190 } else { 1191 start = fStart; 1192 end = fEnd + int32(kBlockSize); 1193 } 1194 if (end >= int32(fSizeInView)) 1195 end = int32(fSizeInView) - 1; 1196 } else { 1197 end = fEnd + int32(kBlockSize); 1198 if (end >= int32(fSizeInView)) 1199 start = fEnd; 1200 1201 start = end; 1202 } 1203 1204 SetSelection(start, end); 1205 MakeVisible(end); 1206 break; 1207 } 1208 1209 case B_PAGE_UP: 1210 { 1211 // scroll one page up, but keep the same cursor column 1212 1213 BRect frame = SelectionFrame(fFocus, fStart, fStart); 1214 frame.OffsetBy(0, -Bounds().Height()); 1215 if (frame.top <= kVerticalSpace) 1216 frame.top = kVerticalSpace + 1; 1217 ScrollBy(0, -Bounds().Height()); 1218 1219 int32 position = PositionAt(fFocus, frame.LeftTop()); 1220 SetSelection(position, position); 1221 break; 1222 } 1223 case B_PAGE_DOWN: 1224 { 1225 // scroll one page down, but keep the same cursor column 1226 1227 BRect frame = SelectionFrame(fFocus, fStart, fStart); 1228 frame.OffsetBy(0, Bounds().Height()); 1229 1230 float lastLine = DataBounds().Height() - 1 - kVerticalSpace; 1231 if (frame.top > lastLine) 1232 frame.top = lastLine; 1233 ScrollBy(0, Bounds().Height()); 1234 1235 int32 position = PositionAt(fFocus, frame.LeftTop()); 1236 SetSelection(position, position); 1237 break; 1238 } 1239 case B_HOME: 1240 SetSelection(0, 0); 1241 MakeVisible(fStart); 1242 break; 1243 case B_END: 1244 SetSelection(fDataSize - 1, fDataSize - 1); 1245 MakeVisible(fStart); 1246 break; 1247 case B_TAB: 1248 SetFocus(fFocus == kHexFocus ? kAsciiFocus : kHexFocus); 1249 MakeVisible(fStart); 1250 break; 1251 1252 case B_FUNCTION_KEY: 1253 // this is ignored 1254 break; 1255 1256 case B_BACKSPACE: 1257 if (fBitPosition == 0) 1258 SetSelection(fStart - 1, fStart - 1); 1259 1260 if (fFocus == kHexFocus) 1261 fBitPosition = (fBitPosition + 4) % 8; 1262 1263 // supposed to fall through 1264 case B_DELETE: 1265 SetSelection(fStart, fStart); 1266 // to make sure only the cursor is selected 1267 1268 if (fFocus == kHexFocus) { 1269 const uint8 *data = DataAt(fStart); 1270 if (data == NULL) 1271 break; 1272 1273 uint8 c = data[0] & (fBitPosition == 0 ? 0x0f : 0xf0); 1274 // mask out region to be cleared 1275 1276 fEditor.Replace(fOffset + fStart, &c, 1); 1277 } else 1278 fEditor.Replace(fOffset + fStart, (const uint8 *)"", 1); 1279 break; 1280 1281 default: 1282 if (fFocus == kHexFocus) { 1283 // only hexadecimal characters are allowed to be entered 1284 const uint8 *data = DataAt(fStart); 1285 uint8 c = bytes[0]; 1286 if (c >= 'A' && c <= 'F') 1287 c += 'A' - 'a'; 1288 const char *hexNumbers = "0123456789abcdef"; 1289 addr_t number; 1290 if (data == NULL || (number = (addr_t)strchr(hexNumbers, c)) == 0) 1291 break; 1292 1293 SetSelection(fStart, fStart); 1294 // to make sure only the cursor is selected 1295 1296 number -= (addr_t)hexNumbers; 1297 fBitPosition = (fBitPosition + 4) % 8; 1298 1299 c = (data[0] & (fBitPosition ? 0x0f : 0xf0)) | (number << fBitPosition); 1300 // mask out overwritten region and bit-wise or the number to be inserted 1301 1302 if (fEditor.Replace(fOffset + fStart, &c, 1) == B_OK && fBitPosition == 0) 1303 SetSelection(fStart + 1, fStart + 1); 1304 } else { 1305 if (fEditor.Replace(fOffset + fStart, (const uint8 *)bytes, numBytes) == B_OK) 1306 SetSelection(fStart + 1, fStart + 1); 1307 } 1308 break; 1309 } 1310 } 1311 1312 1313 void 1314 DataView::SetFont(const BFont *font, uint32 properties) 1315 { 1316 if (!font->IsFixed()) 1317 return; 1318 1319 BView::SetFont(font, properties); 1320 1321 font_height fontHeight; 1322 font->GetHeight(&fontHeight); 1323 1324 fFontHeight = int32(fontHeight.ascent + fontHeight.descent + fontHeight.leading); 1325 fAscent = fontHeight.ascent; 1326 fCharWidth = font->StringWidth("w"); 1327 } 1328 1329 1330 float 1331 DataView::FontSize() const 1332 { 1333 BFont font; 1334 GetFont(&font); 1335 1336 return font.Size(); 1337 } 1338 1339 1340 void 1341 DataView::SetFontSize(float point) 1342 { 1343 bool fit = (point == 0.0f); 1344 if (fit) { 1345 if (!fFitFontSize) 1346 SendNotices(kDataViewPreferredSize); 1347 fFitFontSize = fit; 1348 1349 FrameResized(Bounds().Width(), Bounds().Height()); 1350 return; 1351 } 1352 1353 fFitFontSize = false; 1354 1355 BFont font = be_fixed_font; 1356 font.SetSize(point); 1357 1358 SetFont(&font); 1359 UpdateScroller(); 1360 Invalidate(); 1361 1362 SendNotices(kDataViewPreferredSize); 1363 } 1364 1365 1366 void 1367 DataView::GetPreferredSize(float *_width, float *_height) 1368 { 1369 BRect bounds = DataBounds(); 1370 1371 if (_width) 1372 *_width = bounds.Width(); 1373 1374 if (_height) 1375 *_height = bounds.Height(); 1376 } 1377 1378