diff --git a/src/LineBlockCharacters.cpp b/src/LineBlockCharacters.cpp index a562f454..99a13796 100644 --- a/src/LineBlockCharacters.cpp +++ b/src/LineBlockCharacters.cpp @@ -1,722 +1,722 @@ /* This file is part of Konsole, a terminal emulator for KDE. Copyright 2018-2019 by Mariusz Glebocki Copyright 2018 by Martin T. H. Sandsmark Copyright 2015-2018 by Kurt Hindenburg Copyright 2005 by Maksim Orlovich This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ // Own #include "LineBlockCharacters.h" // Qt #include namespace Konsole { namespace LineBlockCharacters { enum LineType { LtNone = 0, LtDouble = 1, LtLight = 2, LtHeavy = 3, }; // PackedLineTypes is an 8-bit number representing types of 4 line character's lines. Each line is // represented by 2 bits. Lines order, starting from MSB: top, right, bottom, left. static inline constexpr quint8 makePackedLineTypes(LineType top, LineType right, LineType bottom, LineType left) { return (int(top) & 3) << 6 | (int(right) & 3) << 4 | (int(bottom) & 3) << 2 | (int(left) & 3); } static constexpr const quint8 PackedLineTypesLut[] = { // top right bottom left makePackedLineTypes(LtNone , LtLight , LtNone , LtLight ), /* U+2500 ─ */ makePackedLineTypes(LtNone , LtHeavy , LtNone , LtHeavy ), /* U+2501 ━ */ makePackedLineTypes(LtLight , LtNone , LtLight , LtNone ), /* U+2502 │ */ makePackedLineTypes(LtHeavy , LtNone , LtHeavy , LtNone ), /* U+2503 ┃ */ 0, 0, 0, 0, 0, 0, 0, 0, /* U+2504-0x250b */ makePackedLineTypes(LtNone , LtLight , LtLight , LtNone ), /* U+250C ┌ */ makePackedLineTypes(LtNone , LtHeavy , LtLight , LtNone ), /* U+250D ┍ */ makePackedLineTypes(LtNone , LtLight , LtHeavy , LtNone ), /* U+250E ┎ */ makePackedLineTypes(LtNone , LtHeavy , LtHeavy , LtNone ), /* U+250F ┏ */ makePackedLineTypes(LtNone , LtNone , LtLight , LtLight ), /* U+2510 ┐ */ makePackedLineTypes(LtNone , LtNone , LtLight , LtHeavy ), /* U+2511 ┑ */ makePackedLineTypes(LtNone , LtNone , LtHeavy , LtLight ), /* U+2512 ┒ */ makePackedLineTypes(LtNone , LtNone , LtHeavy , LtHeavy ), /* U+2513 ┓ */ makePackedLineTypes(LtLight , LtLight , LtNone , LtNone ), /* U+2514 └ */ makePackedLineTypes(LtLight , LtHeavy , LtNone , LtNone ), /* U+2515 ┕ */ makePackedLineTypes(LtHeavy , LtLight , LtNone , LtNone ), /* U+2516 ┖ */ makePackedLineTypes(LtHeavy , LtHeavy , LtNone , LtNone ), /* U+2517 ┗ */ makePackedLineTypes(LtLight , LtNone , LtNone , LtLight ), /* U+2518 ┘ */ makePackedLineTypes(LtLight , LtNone , LtNone , LtHeavy ), /* U+2519 ┙ */ makePackedLineTypes(LtHeavy , LtNone , LtNone , LtLight ), /* U+251A ┚ */ makePackedLineTypes(LtHeavy , LtNone , LtNone , LtHeavy ), /* U+251B ┛ */ makePackedLineTypes(LtLight , LtLight , LtLight , LtNone ), /* U+251C ├ */ makePackedLineTypes(LtLight , LtHeavy , LtLight , LtNone ), /* U+251D ┝ */ makePackedLineTypes(LtHeavy , LtLight , LtLight , LtNone ), /* U+251E ┞ */ makePackedLineTypes(LtLight , LtLight , LtHeavy , LtNone ), /* U+251F ┟ */ makePackedLineTypes(LtHeavy , LtLight , LtHeavy , LtNone ), /* U+2520 ┠ */ makePackedLineTypes(LtHeavy , LtHeavy , LtLight , LtNone ), /* U+2521 ┡ */ makePackedLineTypes(LtLight , LtHeavy , LtHeavy , LtNone ), /* U+2522 ┢ */ makePackedLineTypes(LtHeavy , LtHeavy , LtHeavy , LtNone ), /* U+2523 ┣ */ makePackedLineTypes(LtLight , LtNone , LtLight , LtLight ), /* U+2524 ┤ */ makePackedLineTypes(LtLight , LtNone , LtLight , LtHeavy ), /* U+2525 ┥ */ makePackedLineTypes(LtHeavy , LtNone , LtLight , LtLight ), /* U+2526 ┦ */ makePackedLineTypes(LtLight , LtNone , LtHeavy , LtLight ), /* U+2527 ┧ */ makePackedLineTypes(LtHeavy , LtNone , LtHeavy , LtLight ), /* U+2528 ┨ */ makePackedLineTypes(LtHeavy , LtNone , LtLight , LtHeavy ), /* U+2529 ┩ */ makePackedLineTypes(LtLight , LtNone , LtHeavy , LtHeavy ), /* U+252A ┪ */ makePackedLineTypes(LtHeavy , LtNone , LtHeavy , LtHeavy ), /* U+252B ┫ */ makePackedLineTypes(LtNone , LtLight , LtLight , LtLight ), /* U+252C ┬ */ makePackedLineTypes(LtNone , LtLight , LtLight , LtHeavy ), /* U+252D ┭ */ makePackedLineTypes(LtNone , LtHeavy , LtLight , LtLight ), /* U+252E ┮ */ makePackedLineTypes(LtNone , LtHeavy , LtLight , LtHeavy ), /* U+252F ┯ */ makePackedLineTypes(LtNone , LtLight , LtHeavy , LtLight ), /* U+2530 ┰ */ makePackedLineTypes(LtNone , LtLight , LtHeavy , LtHeavy ), /* U+2531 ┱ */ makePackedLineTypes(LtNone , LtHeavy , LtHeavy , LtLight ), /* U+2532 ┲ */ makePackedLineTypes(LtNone , LtHeavy , LtHeavy , LtHeavy ), /* U+2533 ┳ */ makePackedLineTypes(LtLight , LtLight , LtNone , LtLight ), /* U+2534 ┴ */ makePackedLineTypes(LtLight , LtLight , LtNone , LtHeavy ), /* U+2535 ┵ */ makePackedLineTypes(LtLight , LtHeavy , LtNone , LtLight ), /* U+2536 ┶ */ makePackedLineTypes(LtLight , LtHeavy , LtNone , LtHeavy ), /* U+2537 ┷ */ makePackedLineTypes(LtHeavy , LtLight , LtNone , LtLight ), /* U+2538 ┸ */ makePackedLineTypes(LtHeavy , LtLight , LtNone , LtHeavy ), /* U+2539 ┹ */ makePackedLineTypes(LtHeavy , LtHeavy , LtNone , LtLight ), /* U+253A ┺ */ makePackedLineTypes(LtHeavy , LtHeavy , LtNone , LtHeavy ), /* U+253B ┻ */ makePackedLineTypes(LtLight , LtLight , LtLight , LtLight ), /* U+253C ┼ */ makePackedLineTypes(LtLight , LtLight , LtLight , LtHeavy ), /* U+253D ┽ */ makePackedLineTypes(LtLight , LtHeavy , LtLight , LtLight ), /* U+253E ┾ */ makePackedLineTypes(LtLight , LtHeavy , LtLight , LtHeavy ), /* U+253F ┿ */ makePackedLineTypes(LtHeavy , LtLight , LtLight , LtLight ), /* U+2540 ╀ */ makePackedLineTypes(LtLight , LtLight , LtHeavy , LtLight ), /* U+2541 ╁ */ makePackedLineTypes(LtHeavy , LtLight , LtHeavy , LtLight ), /* U+2542 ╂ */ makePackedLineTypes(LtHeavy , LtLight , LtLight , LtHeavy ), /* U+2543 ╃ */ makePackedLineTypes(LtHeavy , LtHeavy , LtLight , LtLight ), /* U+2544 ╄ */ makePackedLineTypes(LtLight , LtLight , LtHeavy , LtHeavy ), /* U+2545 ╅ */ makePackedLineTypes(LtLight , LtHeavy , LtHeavy , LtLight ), /* U+2546 ╆ */ makePackedLineTypes(LtHeavy , LtHeavy , LtLight , LtHeavy ), /* U+2547 ╇ */ makePackedLineTypes(LtLight , LtHeavy , LtHeavy , LtHeavy ), /* U+2548 ╈ */ makePackedLineTypes(LtHeavy , LtLight , LtHeavy , LtHeavy ), /* U+2549 ╉ */ makePackedLineTypes(LtHeavy , LtHeavy , LtHeavy , LtLight ), /* U+254A ╊ */ makePackedLineTypes(LtHeavy , LtHeavy , LtHeavy , LtHeavy ), /* U+254B ╋ */ 0, 0, 0, 0, /* U+254C - U+254F */ makePackedLineTypes(LtNone , LtDouble, LtNone , LtDouble), /* U+2550 ═ */ makePackedLineTypes(LtDouble, LtNone , LtDouble, LtNone ), /* U+2551 ║ */ makePackedLineTypes(LtNone , LtDouble, LtLight , LtNone ), /* U+2552 ╒ */ makePackedLineTypes(LtNone , LtLight , LtDouble, LtNone ), /* U+2553 ╓ */ makePackedLineTypes(LtNone , LtDouble, LtDouble, LtNone ), /* U+2554 ╔ */ makePackedLineTypes(LtNone , LtNone , LtLight , LtDouble), /* U+2555 ╕ */ makePackedLineTypes(LtNone , LtNone , LtDouble, LtLight ), /* U+2556 ╖ */ makePackedLineTypes(LtNone , LtNone , LtDouble, LtDouble), /* U+2557 ╗ */ makePackedLineTypes(LtLight , LtDouble, LtNone , LtNone ), /* U+2558 ╘ */ makePackedLineTypes(LtDouble, LtLight , LtNone , LtNone ), /* U+2559 ╙ */ makePackedLineTypes(LtDouble, LtDouble, LtNone , LtNone ), /* U+255A ╚ */ makePackedLineTypes(LtLight , LtNone , LtNone , LtDouble), /* U+255B ╛ */ makePackedLineTypes(LtDouble, LtNone , LtNone , LtLight ), /* U+255C ╜ */ makePackedLineTypes(LtDouble, LtNone , LtNone , LtDouble), /* U+255D ╝ */ makePackedLineTypes(LtLight , LtDouble, LtLight , LtNone ), /* U+255E ╞ */ makePackedLineTypes(LtDouble, LtLight , LtDouble, LtNone ), /* U+255F ╟ */ makePackedLineTypes(LtDouble, LtDouble, LtDouble, LtNone ), /* U+2560 ╠ */ makePackedLineTypes(LtLight , LtNone , LtLight , LtDouble), /* U+2561 ╡ */ makePackedLineTypes(LtDouble, LtNone , LtDouble, LtLight ), /* U+2562 ╢ */ makePackedLineTypes(LtDouble, LtNone , LtDouble, LtDouble), /* U+2563 ╣ */ makePackedLineTypes(LtNone , LtDouble, LtLight , LtDouble), /* U+2564 ╤ */ makePackedLineTypes(LtNone , LtLight , LtDouble, LtLight ), /* U+2565 ╥ */ makePackedLineTypes(LtNone , LtDouble, LtDouble, LtDouble), /* U+2566 ╦ */ makePackedLineTypes(LtLight , LtDouble, LtNone , LtDouble), /* U+2567 ╧ */ makePackedLineTypes(LtDouble, LtLight , LtNone , LtLight ), /* U+2568 ╨ */ makePackedLineTypes(LtDouble, LtDouble, LtNone , LtDouble), /* U+2569 ╩ */ makePackedLineTypes(LtLight , LtDouble, LtLight , LtDouble), /* U+256A ╪ */ makePackedLineTypes(LtDouble, LtLight , LtDouble, LtLight ), /* U+256B ╫ */ makePackedLineTypes(LtDouble, LtDouble, LtDouble, LtDouble), /* U+256C ╬ */ 0, 0, 0, 0, 0, 0, 0, /* U+256D - U+2573 */ makePackedLineTypes(LtNone , LtNone , LtNone , LtLight ), /* U+2574 ╴ */ makePackedLineTypes(LtLight , LtNone , LtNone , LtNone ), /* U+2575 ╵ */ makePackedLineTypes(LtNone , LtLight , LtNone , LtNone ), /* U+2576 ╶ */ makePackedLineTypes(LtNone , LtNone , LtLight , LtNone ), /* U+2577 ╷ */ makePackedLineTypes(LtNone , LtNone , LtNone , LtHeavy ), /* U+2578 ╸ */ makePackedLineTypes(LtHeavy , LtNone , LtNone , LtNone ), /* U+2579 ╹ */ makePackedLineTypes(LtNone , LtHeavy , LtNone , LtNone ), /* U+257A ╺ */ makePackedLineTypes(LtNone , LtNone , LtHeavy , LtNone ), /* U+257B ╻ */ makePackedLineTypes(LtNone , LtHeavy , LtNone , LtLight ), /* U+257C ╼ */ makePackedLineTypes(LtLight , LtNone , LtHeavy , LtNone ), /* U+257D ╽ */ makePackedLineTypes(LtNone , LtLight , LtNone , LtHeavy ), /* U+257E ╾ */ makePackedLineTypes(LtHeavy , LtNone , LtLight , LtNone ), /* U+257F ╿ */ }; // Bitwise rotate left template inline static T rotateBitsLeft(T value, quint8 amount) { static_assert (std::is_unsigned(), "T must be unsigned type"); - assert(amount < sizeof(value) * 8); + Q_ASSERT(amount < sizeof(value) * 8); return value << amount | value >> (sizeof(value) * 8 - amount); } inline static const QPen pen(const QPainter &paint, uint lineWidth) { return QPen(paint.pen().brush(), lineWidth, Qt::SolidLine, Qt::FlatCap, Qt::MiterJoin); } static inline uint lineWidth(uint fontWidth, bool heavy, bool bold) { static const qreal LightWidthToFontWidthRatio = 1.0 / 6.5; static const qreal HeavyHalfExtraToLightRatio = 1.0 / 3.0; static const qreal BoldCoefficient = 1.5; // ▄▄▄▄▄▄▄ } heavyHalfExtraWidth ⎫ // ██████████████ } lightWidth ⎬ heavyWidth // ▀▀▀▀▀▀▀ ⎭ // light heavy const qreal baseWidth = fontWidth * LightWidthToFontWidthRatio; const qreal boldCoeff = bold ? BoldCoefficient : 1.0; // Unless font size is too small, make bold lines at least 1px wider than regular lines const qreal minWidth = bold && fontWidth >= 7 ? baseWidth + 1.0 : 1.0; const uint lightWidth = qRound(qMax(baseWidth * boldCoeff, minWidth)); const uint heavyHalfExtraWidth = qRound(qMax(lightWidth * HeavyHalfExtraToLightRatio, 1.0)); return heavy ? lightWidth + 2 * heavyHalfExtraWidth : lightWidth; } // Draws characters composed of straight solid lines static bool drawBasicLineCharacter(QPainter& paint, int x, int y, int w, int h, uchar code, bool bold) { quint8 packedLineTypes = code >= sizeof(PackedLineTypesLut) ? 0 : PackedLineTypesLut[code]; if (packedLineTypes == 0) { return false; } const uint lightLineWidth = lineWidth(w, false, bold); const uint heavyLineWidth = lineWidth(w, true, bold); // Distance from double line's parallel axis to each line's parallel axis const uint doubleLinesDistance = lightLineWidth; const QPen lightPen = pen(paint, lightLineWidth); const QPen heavyPen = pen(paint, heavyLineWidth); static constexpr const unsigned LinesNum = 4; // Pixel aligned center point const QPointF center = { x + int(w/2) + 0.5 * (lightLineWidth % 2), y + int(h/2) + 0.5 * (lightLineWidth % 2), }; // Lines starting points, on the cell edges const QPointF origin[] = { QPointF(center.x(), y ), QPointF(x+w , center.y() ), QPointF(center.x(), y+h ), QPointF(x , center.y() ), }; // Unit vectors with directions from center to the line's origin point static const QPointF dir[] = {{0, -1}, {1, 0}, {0, 1}, {-1, 0}}; const auto removeLineType = [&packedLineTypes](quint8 lineId)->void { lineId = LinesNum - 1 - lineId % LinesNum; packedLineTypes &= ~(3 << (2 * lineId)); }; const auto getLineType = [&packedLineTypes](quint8 lineId)->LineType { lineId = LinesNum - 1 - lineId % LinesNum; return LineType(packedLineTypes >> 2 * lineId & 3); }; QPainterPath lightPath; // PainterPath for light lines (Painter Path Light) QPainterPath heavyPath; // PainterPath for heavy lines (Painter Path Heavy) // Returns ppl or pph depending on line type const auto pathForLine = [&](quint8 lineId) -> QPainterPath& { Q_ASSERT(getLineType(lineId) != LtNone); return getLineType(lineId) == LtHeavy ? heavyPath : lightPath; }; // Process all single up-down/left-right lines for every character that has them. Doing it here // reduces amount of combinations below. // Fully draws: ╋ ╂ ┃ ┿ ┼ │ ━ ─ for (unsigned topIndex = 0; topIndex < LinesNum/2; topIndex++) { unsigned iB = (topIndex + 2) % LinesNum; const bool isSingleLine = (getLineType(topIndex) == LtLight || getLineType(topIndex) == LtHeavy); if (isSingleLine && getLineType(topIndex) == getLineType(iB)) { pathForLine(topIndex).moveTo(origin[topIndex]); pathForLine(topIndex).lineTo(origin[iB]); removeLineType(topIndex); removeLineType(iB); } } // Find base rotation of a character and map rotated line indices to the original rotation's // indices. The base rotation is defined as the one with largest packedLineTypes value. This way // we can use the same code for drawing 4 possible character rotations (see switch() below) uint topIndex = 0; // index of an original top line in a base rotation quint8 basePackedLineTypes = packedLineTypes; for (uint i = 0; i < LinesNum; i++) { const quint8 rotatedPackedLineTypes = rotateBitsLeft(packedLineTypes, i * 2); if (rotatedPackedLineTypes > basePackedLineTypes) { topIndex = i; basePackedLineTypes = rotatedPackedLineTypes; } } uint rightIndex = (topIndex + 1) % LinesNum; uint bottomIndex = (topIndex + 2) % LinesNum; uint leftIndex = (topIndex + 3) % LinesNum; // Common paths const auto drawDoubleUpRightShorterLine = [&](quint8 top, quint8 right) { // ╚ lightPath.moveTo(origin[top] + dir[right] * doubleLinesDistance); lightPath.lineTo(center + (dir[right] + dir[top]) * doubleLinesDistance); lightPath.lineTo(origin[right] + dir[top] * doubleLinesDistance); }; const auto drawUpRight = [&](quint8 top, quint8 right) { // └┗ pathForLine(top).moveTo(origin[top]); pathForLine(top).lineTo(center); pathForLine(top).lineTo(origin[right]); }; switch (basePackedLineTypes) { case makePackedLineTypes(LtHeavy , LtNone , LtLight , LtNone ): // ╿ ; ╼ ╽ ╾ ╊ ╇ ╉ ╈ ╀ ┾ ╁ ┽ lightPath.moveTo(origin[bottomIndex]); lightPath.lineTo(center + dir[topIndex] * lightLineWidth / 2.0); Q_FALLTHROUGH(); case makePackedLineTypes(LtHeavy , LtNone , LtNone , LtNone ): // ╹ ; ╺ ╻ ╸ ┻ ┣ ┳ ┫ ┸ ┝ ┰ ┥ case makePackedLineTypes(LtLight , LtNone , LtNone , LtNone ): // ╵ ; ╶ ╷ ╴ ┷ ┠ ┯ ┨ ┴ ├ ┬ ┤ pathForLine(topIndex).moveTo(origin[topIndex]); pathForLine(topIndex).lineTo(center); break; case makePackedLineTypes(LtHeavy , LtHeavy , LtLight , LtLight ): // ╄ ; ╃ ╆ ╅ drawUpRight(bottomIndex, leftIndex); Q_FALLTHROUGH(); case makePackedLineTypes(LtHeavy , LtHeavy , LtNone , LtNone ): // ┗ ; ┛ ┏ ┓ case makePackedLineTypes(LtLight , LtLight , LtNone , LtNone ): // └ ; ┘ ┌ ┐ drawUpRight(topIndex, rightIndex); break; case makePackedLineTypes(LtHeavy , LtLight , LtNone , LtNone ): // ┖ ; ┙ ┍ ┒ qSwap(leftIndex, rightIndex); Q_FALLTHROUGH(); case makePackedLineTypes(LtHeavy , LtNone , LtNone , LtLight ): // ┚ ; ┕ ┎ ┑ lightPath.moveTo(origin[leftIndex]); lightPath.lineTo(center); heavyPath.moveTo(origin[topIndex]); heavyPath.lineTo(center + dir[bottomIndex] * lightLineWidth / 2.0); break; case makePackedLineTypes(LtLight , LtDouble, LtNone , LtNone ): // ╘ ; ╜ ╓ ╕ qSwap(leftIndex, rightIndex); Q_FALLTHROUGH(); case makePackedLineTypes(LtLight , LtNone , LtNone , LtDouble): // ╛ ; ╙ ╒ ╖ lightPath.moveTo(origin[topIndex]); lightPath.lineTo(center + dir[bottomIndex] * doubleLinesDistance); lightPath.lineTo(origin[leftIndex] + dir[bottomIndex] * doubleLinesDistance); lightPath.moveTo(origin[leftIndex] - dir[bottomIndex] * doubleLinesDistance); lightPath.lineTo(center - dir[bottomIndex] * doubleLinesDistance); break; case makePackedLineTypes(LtHeavy , LtHeavy , LtLight , LtNone ): // ┡ ; ┹ ┪ ┲ qSwap(leftIndex, bottomIndex); qSwap(rightIndex, topIndex); Q_FALLTHROUGH(); case makePackedLineTypes(LtHeavy , LtHeavy , LtNone , LtLight ): // ┺ ; ┩ ┢ ┱ drawUpRight(topIndex, rightIndex); lightPath.moveTo(origin[leftIndex]); lightPath.lineTo(center); break; case makePackedLineTypes(LtHeavy , LtLight , LtLight , LtNone ): // ┞ ; ┵ ┧ ┮ qSwap(leftIndex, rightIndex); Q_FALLTHROUGH(); case makePackedLineTypes(LtHeavy , LtNone , LtLight , LtLight ): // ┦ ; ┶ ┟ ┭ heavyPath.moveTo(origin[topIndex]); heavyPath.lineTo(center + dir[bottomIndex] * lightLineWidth / 2.0); drawUpRight(bottomIndex, leftIndex); break; case makePackedLineTypes(LtLight , LtDouble, LtNone , LtDouble): // ╧ ; ╟ ╢ ╤ lightPath.moveTo(origin[topIndex]); lightPath.lineTo(center - dir[bottomIndex] * doubleLinesDistance); qSwap(leftIndex, bottomIndex); qSwap(rightIndex, topIndex); Q_FALLTHROUGH(); case makePackedLineTypes(LtDouble, LtNone , LtDouble, LtNone ): // ║ ; ╫ ═ ╪ lightPath.moveTo(origin[topIndex] + dir[leftIndex] * doubleLinesDistance); lightPath.lineTo(origin[bottomIndex] + dir[leftIndex] * doubleLinesDistance); lightPath.moveTo(origin[topIndex] + dir[rightIndex] * doubleLinesDistance); lightPath.lineTo(origin[bottomIndex] + dir[rightIndex] * doubleLinesDistance); break; case makePackedLineTypes(LtDouble, LtNone , LtNone , LtNone ): // ╨ ; ╞ ╥ ╡ lightPath.moveTo(origin[topIndex] + dir[leftIndex] * doubleLinesDistance); lightPath.lineTo(center + dir[leftIndex] * doubleLinesDistance); lightPath.moveTo(origin[topIndex] + dir[rightIndex] * doubleLinesDistance); lightPath.lineTo(center + dir[rightIndex] * doubleLinesDistance); break; case makePackedLineTypes(LtDouble, LtDouble, LtDouble, LtDouble): // ╬ drawDoubleUpRightShorterLine(topIndex, rightIndex); drawDoubleUpRightShorterLine(bottomIndex, rightIndex); drawDoubleUpRightShorterLine(topIndex, leftIndex); drawDoubleUpRightShorterLine(bottomIndex, leftIndex); break; case makePackedLineTypes(LtDouble, LtDouble, LtDouble, LtNone ): // ╠ ; ╩ ╣ ╦ lightPath.moveTo(origin[topIndex] + dir[leftIndex] * doubleLinesDistance); lightPath.lineTo(origin[bottomIndex] + dir[leftIndex] * doubleLinesDistance); drawDoubleUpRightShorterLine(topIndex, rightIndex); drawDoubleUpRightShorterLine(bottomIndex, rightIndex); break; case makePackedLineTypes(LtDouble, LtDouble, LtNone , LtNone ): // ╚ ; ╝ ╔ ╗ lightPath.moveTo(origin[topIndex] + dir[leftIndex] * doubleLinesDistance); lightPath.lineTo(center + (dir[leftIndex] + dir[bottomIndex]) * doubleLinesDistance); lightPath.lineTo(origin[rightIndex] + dir[bottomIndex] * doubleLinesDistance); drawDoubleUpRightShorterLine(topIndex, rightIndex); break; } // Draw paths if (!lightPath.isEmpty()) { paint.strokePath(lightPath, lightPen); } if (!heavyPath.isEmpty()) { paint.strokePath(heavyPath, heavyPen); } return true; } static inline bool drawDashedLineCharacter(QPainter &paint, int x, int y, int w, int h, uchar code, bool bold) { if (!((0x04 <= code && code <= 0x0B) || (0x4C <= code && code <= 0x4F))) { return false; } const uint lightLineWidth = lineWidth(w, false, bold); const uint heavyLineWidth = lineWidth(w, true, bold); const auto lightPen = pen(paint, lightLineWidth); const auto heavyPen = pen(paint, heavyLineWidth); // Pixel aligned center point const QPointF center = { int(x + w/2.0) + 0.5 * (lightLineWidth%2), int(y + h/2.0) + 0.5 * (lightLineWidth%2), }; const qreal halfGapH = qMax(w / 20.0, 0.5); const qreal halfGapV = qMax(h / 26.0, 0.5); // For some reason vertical double dash has bigger gap const qreal halfGapDDV = qMax(h / 14.0, 0.5); static const int LinesNumMax = 4; enum Orientation {Horizontal, Vertical}; struct { int linesNum; Orientation orientation; QPen pen; qreal halfGap; } lineProps; switch (code) { case 0x4C: lineProps = {2, Horizontal, lightPen, halfGapH }; break; // ╌ case 0x4D: lineProps = {2, Horizontal, heavyPen, halfGapH }; break; // ╍ case 0x4E: lineProps = {2, Vertical , lightPen, halfGapDDV}; break; // ╎ case 0x4F: lineProps = {2, Vertical , heavyPen, halfGapDDV}; break; // ╏ case 0x04: lineProps = {3, Horizontal, lightPen, halfGapH }; break; // ┄ case 0x05: lineProps = {3, Horizontal, heavyPen, halfGapH }; break; // ┅ case 0x06: lineProps = {3, Vertical , lightPen, halfGapV }; break; // ┆ case 0x07: lineProps = {3, Vertical , heavyPen, halfGapV }; break; // ┇ case 0x08: lineProps = {4, Horizontal, lightPen, halfGapH }; break; // ┈ case 0x09: lineProps = {4, Horizontal, heavyPen, halfGapH }; break; // ┉ case 0x0A: lineProps = {4, Vertical , lightPen, halfGapV }; break; // ┊ case 0x0B: lineProps = {4, Vertical , heavyPen, halfGapV }; break; // ┋ } Q_ASSERT(lineProps.linesNum <= LinesNumMax); const int size = (lineProps.orientation == Horizontal ? w : h); const int pos = (lineProps.orientation == Horizontal ? x : y); QLineF lines[LinesNumMax]; for (int i = 0; i < lineProps.linesNum; i++) { const qreal start = pos + qreal(size * (i )) / lineProps.linesNum; const qreal end = pos + qreal(size * (i+1)) / lineProps.linesNum; if (lineProps.orientation == Horizontal) { lines[i] = QLineF{start + lineProps.halfGap, center.y(), end - lineProps.halfGap, center.y()}; } else { lines[i] = QLineF{center.x(), start + lineProps.halfGap, center.x(), end - lineProps.halfGap}; } } const auto origPen = paint.pen(); paint.setPen(lineProps.pen); paint.drawLines(lines, lineProps.linesNum); paint.setPen(origPen); return true; } static inline bool drawRoundedCornerLineCharacter(QPainter &paint, int x, int y, int w, int h, uchar code, bool bold) { if (!(0x6D <= code && code <= 0x70)) { return false; } const uint lightLineWidth = lineWidth(w, false, bold); const auto lightPen = pen(paint, lightLineWidth); // Pixel aligned center point const QPointF center = { int(x + w/2.0) + 0.5 * (lightLineWidth%2), int(y + h/2.0) + 0.5 * (lightLineWidth%2), }; const int r = w * 3 / 8; const int d = 2 * r; QPainterPath path; // lineTo() between moveTo and arcTo is redundant - arcTo() draws line // to the arc's starting point switch (code) { case 0x6D: // BOX DRAWINGS LIGHT ARC DOWN AND RIGHT path.moveTo(center.x(), y + h); path.arcTo(center.x(), center.y(), d, d, 180, -90); path.lineTo(x + w, center.y()); break; case 0x6E: // BOX DRAWINGS LIGHT ARC DOWN AND LEFT path.moveTo(center.x(), y + h); path.arcTo(center.x() - d, center.y(), d, d, 0, 90); path.lineTo(x, center.y()); break; case 0x6F: // BOX DRAWINGS LIGHT ARC UP AND LEFT path.moveTo(center.x(), y); path.arcTo(center.x() - d, center.y() - d, d, d, 0, -90); path.lineTo(x, center.y()); break; case 0x70: // BOX DRAWINGS LIGHT ARC UP AND RIGHT path.moveTo(center.x(), y); path.arcTo(center.x(), center.y() - d, d, d, 180, 90); path.lineTo(x + w, center.y()); break; } paint.strokePath(path, lightPen); return true; } static inline bool drawDiagonalLineCharacter(QPainter &paint, int x, int y, int w, int h, uchar code, bool bold) { if (!(0x71 <= code && code <= 0x73)) { return false; } const uint lightLineWidth = lineWidth(w, false, bold); const auto lightPen = pen(paint, lightLineWidth); const QLineF lines[] = { QLineF(x+w, y, x , y+h), // '/' QLineF(x , y, x+w, y+h), // '\' }; const auto origPen = paint.pen(); paint.setPen(lightPen); switch (code) { case 0x71: // BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO LOWER LEFT paint.drawLine(lines[0]); break; case 0x72: // BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO LOWER RIGHT paint.drawLine(lines[1]); break; case 0x73: // BOX DRAWINGS LIGHT DIAGONAL CROSS paint.drawLines(lines, 2); break; } paint.setPen(origPen); return true; } static inline bool drawBlockCharacter(QPainter &paint, int x, int y, int w, int h, uchar code, bool bold) { Q_UNUSED(bold); const QColor color = paint.pen().color(); // Center point const QPointF center = { x + w/2.0, y + h/2.0, }; // Default rect fills entire cell QRectF rect(x, y, w, h); // LOWER ONE EIGHTH BLOCK to LEFT ONE EIGHTH BLOCK if (code >= 0x81 && code <= 0x8f) { if (code < 0x88) { // Horizontal const qreal height = h * (0x88 - code) / 8.0; rect.setY(y + height); rect.setHeight(h - height); } else if (code > 0x88) { // Vertical const qreal width = w * (0x90 - code) / 8.0; rect.setWidth(width); } paint.fillRect(rect, color); return true; } // Combinations of quarter squares // LEFT ONE EIGHTH BLOCK to QUADRANT UPPER RIGHT AND LOWER LEFT AND LOWER RIGHT if (code >= 0x96 && code <= 0x9F) { const QRectF upperLeft (x , y , w/2.0, h/2.0); const QRectF upperRight(center.x(), y , w/2.0, h/2.0); const QRectF lowerLeft (x , center.y(), w/2.0, h/2.0); const QRectF lowerRight(center.x(), center.y(), w/2.0, h/2.0); QPainterPath path; switch (code) { case 0x96: // ▖ path.addRect(lowerLeft); break; case 0x97: // ▗ path.addRect(lowerRight); break; case 0x98: // ▘ path.addRect(upperLeft); break; case 0x99: // ▙ path.addRect(upperLeft); path.addRect(lowerLeft); path.addRect(lowerRight); break; case 0x9a: // ▚ path.addRect(upperLeft); path.addRect(lowerRight); break; case 0x9b: // ▛ path.addRect(upperLeft); path.addRect(upperRight); path.addRect(lowerLeft); break; case 0x9c: // ▜ path.addRect(upperLeft); path.addRect(upperRight); path.addRect(lowerRight); break; case 0x9d: // ▝ path.addRect(upperRight); break; case 0x9e: // ▞ path.addRect(upperRight); path.addRect(lowerLeft); break; case 0x9f: // ▟ path.addRect(upperRight); path.addRect(lowerLeft); path.addRect(lowerRight); break; } paint.fillPath(path, color); return true; } QBrush lightShade, mediumShade, darkShade; if (paint.testRenderHint(QPainter::Antialiasing)) { lightShade = QColor(color.red(), color.green(), color.blue(), 64); mediumShade = QColor(color.red(), color.green(), color.blue(), 128); darkShade = QColor(color.red(), color.green(), color.blue(), 192); } else { lightShade = QBrush(color, Qt::Dense6Pattern); mediumShade = QBrush(color, Qt::Dense4Pattern); darkShade = QBrush(color, Qt::Dense2Pattern); } // And the random stuff switch (code) { case 0x80: // Top half block rect.setHeight(h/2.0); paint.fillRect(rect, color); return true; case 0x90: // Right half block rect.moveLeft(center.x()); paint.fillRect(rect, color); return true; case 0x94: // Top one eighth block rect.setHeight(h/8.0); paint.fillRect(rect, color); return true; case 0x95: { // Right one eighth block const qreal width = 7 * w / 8.0; rect.moveLeft(x + width); paint.fillRect(rect, color); return true; } case 0x91: // Light shade paint.fillRect(rect, lightShade); return true; case 0x92: // Medium shade paint.fillRect(rect, mediumShade); return true; case 0x93: // Dark shade paint.fillRect(rect, darkShade); return true; default: return false; } } void draw(QPainter &paint, const QRect &cellRect, const QChar &chr, bool bold) { static const ushort FirstBoxDrawingCharacterCodePoint = 0x2500; const uchar code = chr.unicode() - FirstBoxDrawingCharacterCodePoint; int x = cellRect.x(); int y = cellRect.y(); int w = cellRect.width(); int h = cellRect.height(); // Each function below returns true when it has drawn the character, false otherwise. drawBasicLineCharacter(paint, x, y, w, h, code, bold) || drawDashedLineCharacter(paint, x, y, w, h, code, bold) || drawRoundedCornerLineCharacter(paint, x, y, w, h, code, bold) || drawDiagonalLineCharacter(paint, x, y, w, h, code, bold) || drawBlockCharacter(paint, x, y, w, h, code, bold); } } // namespace LineBlockCharacters } // namespace Konsole