diff options
Diffstat (limited to '')
| -rw-r--r-- | src/libvterm/src/pen.c | 516 |
1 files changed, 516 insertions, 0 deletions
diff --git a/src/libvterm/src/pen.c b/src/libvterm/src/pen.c new file mode 100644 index 0000000..b780095 --- /dev/null +++ b/src/libvterm/src/pen.c @@ -0,0 +1,516 @@ +#include "vterm_internal.h" + +#include <stdio.h> + +static const VTermColor ansi_colors[] = { + /* R G B index */ + { 0, 0, 0, 1 }, // black + { 224, 0, 0, 2 }, // red + { 0, 224, 0, 3 }, // green + { 224, 224, 0, 4 }, // yellow + { 0, 0, 224, 5 }, // blue + { 224, 0, 224, 6 }, // magenta + { 0, 224, 224, 7 }, // cyan + { 224, 224, 224, 8 }, // white == light grey + + // high intensity + { 128, 128, 128, 9 }, // black + { 255, 64, 64, 10 }, // red + { 64, 255, 64, 11 }, // green + { 255, 255, 64, 12 }, // yellow + { 64, 64, 255, 13 }, // blue + { 255, 64, 255, 14 }, // magenta + { 64, 255, 255, 15 }, // cyan + { 255, 255, 255, 16 }, // white for real +}; + +static int ramp6[] = { + 0x00, 0x5F, 0x87, 0xAF, 0xD7, 0xFF, +}; + +/* Use 0x81 instead of 0x80 to be able to distinguish from ansi black */ +static int ramp24[] = { + 0x08, 0x12, 0x1C, 0x26, 0x30, 0x3A, 0x44, 0x4E, 0x58, 0x62, 0x6C, 0x76, + 0x81, 0x8A, 0x94, 0x9E, 0xA8, 0xB2, 0xBC, 0xC6, 0xD0, 0xDA, 0xE4, 0xEE, +}; + +static int lookup_colour_ansi(const VTermState *state, long index, VTermColor *col) +{ + if(index >= 0 && index < 16) { + *col = state->colors[index]; + return TRUE; + } + + return FALSE; +} + +static int lookup_colour_palette(const VTermState *state, long index, VTermColor *col) +{ + if(index >= 0 && index < 16) { + // Normal 8 colours or high intensity - parse as palette 0 + return lookup_colour_ansi(state, index, col); + } + else if(index >= 16 && index < 232) { + // 216-colour cube + index -= 16; + + col->blue = ramp6[index % 6]; + col->green = ramp6[index/6 % 6]; + col->red = ramp6[index/6/6 % 6]; + col->ansi_index = VTERM_ANSI_INDEX_NONE; + + return TRUE; + } + else if(index >= 232 && index < 256) { + // 24 greyscales + index -= 232; + + col->blue = ramp24[index]; + col->green = ramp24[index]; + col->red = ramp24[index]; + col->ansi_index = VTERM_ANSI_INDEX_NONE; + + return TRUE; + } + + return FALSE; +} + +static int lookup_colour(const VTermState *state, int palette, const long args[], int argcount, VTermColor *col, int *index) +{ + switch(palette) { + case 2: // RGB mode - 3 args contain colour values directly + if(argcount < 3) + return argcount; + + col->red = (uint8_t)CSI_ARG(args[0]); + col->green = (uint8_t)CSI_ARG(args[1]); + col->blue = (uint8_t)CSI_ARG(args[2]); + col->ansi_index = VTERM_ANSI_INDEX_NONE; + + return 3; + + case 5: // XTerm 256-colour mode + if(index) + *index = CSI_ARG_OR(args[0], -1); + + lookup_colour_palette(state, argcount ? CSI_ARG_OR(args[0], -1) : -1, col); + + return argcount ? 1 : 0; + + default: + DEBUG_LOG1("Unrecognised colour palette %d\n", palette); + return 0; + } +} + +// Some conveniences + +static void setpenattr(VTermState *state, VTermAttr attr, VTermValueType type UNUSED, VTermValue *val) +{ +#ifdef DEBUG + if(type != vterm_get_attr_type(attr)) { + DEBUG_LOG3("Cannot set attr %d as it has type %d, not type %d\n", + attr, vterm_get_attr_type(attr), type); + return; + } +#endif + if(state->callbacks && state->callbacks->setpenattr) + (*state->callbacks->setpenattr)(attr, val, state->cbdata); +} + +static void setpenattr_bool(VTermState *state, VTermAttr attr, int boolean) +{ + VTermValue val; + val.boolean = boolean; + setpenattr(state, attr, VTERM_VALUETYPE_BOOL, &val); +} + +static void setpenattr_int(VTermState *state, VTermAttr attr, int number) +{ + VTermValue val; + val.number = number; + setpenattr(state, attr, VTERM_VALUETYPE_INT, &val); +} + +static void setpenattr_col(VTermState *state, VTermAttr attr, VTermColor color) +{ + VTermValue val; + val.color = color; + setpenattr(state, attr, VTERM_VALUETYPE_COLOR, &val); +} + +static void set_pen_col_ansi(VTermState *state, VTermAttr attr, long col) +{ + VTermColor *colp = (attr == VTERM_ATTR_BACKGROUND) ? &state->pen.bg : &state->pen.fg; + + lookup_colour_ansi(state, col, colp); + + setpenattr_col(state, attr, *colp); +} + +INTERNAL void vterm_state_newpen(VTermState *state) +{ + int col; + + // 90% grey so that pure white is brighter + state->default_fg.red = state->default_fg.green = state->default_fg.blue = 240; + state->default_fg.ansi_index = VTERM_ANSI_INDEX_DEFAULT; + state->default_bg.red = state->default_bg.green = state->default_bg.blue = 0; + state->default_bg.ansi_index = VTERM_ANSI_INDEX_DEFAULT; + + for(col = 0; col < 16; col++) + state->colors[col] = ansi_colors[col]; +} + +INTERNAL void vterm_state_resetpen(VTermState *state) +{ + state->pen.bold = 0; setpenattr_bool(state, VTERM_ATTR_BOLD, 0); + state->pen.underline = 0; setpenattr_int( state, VTERM_ATTR_UNDERLINE, 0); + state->pen.italic = 0; setpenattr_bool(state, VTERM_ATTR_ITALIC, 0); + state->pen.blink = 0; setpenattr_bool(state, VTERM_ATTR_BLINK, 0); + state->pen.reverse = 0; setpenattr_bool(state, VTERM_ATTR_REVERSE, 0); + state->pen.strike = 0; setpenattr_bool(state, VTERM_ATTR_STRIKE, 0); + state->pen.font = 0; setpenattr_int( state, VTERM_ATTR_FONT, 0); + + state->fg_index = -1; + state->bg_index = -1; + state->pen.fg = state->default_fg; setpenattr_col(state, VTERM_ATTR_FOREGROUND, state->default_fg); + state->pen.bg = state->default_bg; setpenattr_col(state, VTERM_ATTR_BACKGROUND, state->default_bg); +} + +INTERNAL void vterm_state_savepen(VTermState *state, int save) +{ + if(save) { + state->saved.pen = state->pen; + } + else { + state->pen = state->saved.pen; + + setpenattr_bool(state, VTERM_ATTR_BOLD, state->pen.bold); + setpenattr_int( state, VTERM_ATTR_UNDERLINE, state->pen.underline); + setpenattr_bool(state, VTERM_ATTR_ITALIC, state->pen.italic); + setpenattr_bool(state, VTERM_ATTR_BLINK, state->pen.blink); + setpenattr_bool(state, VTERM_ATTR_REVERSE, state->pen.reverse); + setpenattr_bool(state, VTERM_ATTR_STRIKE, state->pen.strike); + setpenattr_int( state, VTERM_ATTR_FONT, state->pen.font); + setpenattr_col( state, VTERM_ATTR_FOREGROUND, state->pen.fg); + setpenattr_col( state, VTERM_ATTR_BACKGROUND, state->pen.bg); + } +} + +void vterm_state_get_default_colors(const VTermState *state, VTermColor *default_fg, VTermColor *default_bg) +{ + *default_fg = state->default_fg; + *default_bg = state->default_bg; +} + +void vterm_state_get_palette_color(const VTermState *state, int index, VTermColor *col) +{ + lookup_colour_palette(state, index, col); +} + +void vterm_state_set_default_colors(VTermState *state, const VTermColor *default_fg, const VTermColor *default_bg) +{ + state->default_fg = *default_fg; + state->default_bg = *default_bg; +} + +void vterm_state_set_palette_color(VTermState *state, int index, const VTermColor *col) +{ + if(index >= 0 && index < 16) + { + state->colors[index] = *col; + state->colors[index].ansi_index = index + VTERM_ANSI_INDEX_MIN; + } +} + +void vterm_state_set_bold_highbright(VTermState *state, int bold_is_highbright) +{ + state->bold_is_highbright = bold_is_highbright; +} + +INTERNAL void vterm_state_setpen(VTermState *state, const long args[], int argcount) +{ + // SGR - ECMA-48 8.3.117 + + int argi = 0; + int value; + + while(argi < argcount) { + // This logic is easier to do 'done' backwards; set it true, and make it + // false again in the 'default' case + int done = 1; + + long arg; + switch(arg = CSI_ARG(args[argi])) { + case CSI_ARG_MISSING: + case 0: // Reset + vterm_state_resetpen(state); + break; + + case 1: // Bold on + state->pen.bold = 1; + setpenattr_bool(state, VTERM_ATTR_BOLD, 1); + if(state->fg_index > -1 && state->fg_index < 8 && state->bold_is_highbright) + set_pen_col_ansi(state, VTERM_ATTR_FOREGROUND, state->fg_index + (state->pen.bold ? 8 : 0)); + break; + + case 3: // Italic on + state->pen.italic = 1; + setpenattr_bool(state, VTERM_ATTR_ITALIC, 1); + break; + + case 4: // Underline single + state->pen.underline = 1; + setpenattr_int(state, VTERM_ATTR_UNDERLINE, 1); + break; + + case 5: // Blink + state->pen.blink = 1; + setpenattr_bool(state, VTERM_ATTR_BLINK, 1); + break; + + case 7: // Reverse on + state->pen.reverse = 1; + setpenattr_bool(state, VTERM_ATTR_REVERSE, 1); + break; + + case 9: // Strikethrough on + state->pen.strike = 1; + setpenattr_bool(state, VTERM_ATTR_STRIKE, 1); + break; + + case 10: case 11: case 12: case 13: case 14: + case 15: case 16: case 17: case 18: case 19: // Select font + state->pen.font = CSI_ARG(args[argi]) - 10; + setpenattr_int(state, VTERM_ATTR_FONT, state->pen.font); + break; + + case 21: // Underline double + state->pen.underline = 2; + setpenattr_int(state, VTERM_ATTR_UNDERLINE, 2); + break; + + case 22: // Bold off + state->pen.bold = 0; + setpenattr_bool(state, VTERM_ATTR_BOLD, 0); + break; + + case 23: // Italic and Gothic (currently unsupported) off + state->pen.italic = 0; + setpenattr_bool(state, VTERM_ATTR_ITALIC, 0); + break; + + case 24: // Underline off + state->pen.underline = 0; + setpenattr_int(state, VTERM_ATTR_UNDERLINE, 0); + break; + + case 25: // Blink off + state->pen.blink = 0; + setpenattr_bool(state, VTERM_ATTR_BLINK, 0); + break; + + case 27: // Reverse off + state->pen.reverse = 0; + setpenattr_bool(state, VTERM_ATTR_REVERSE, 0); + break; + + case 29: // Strikethrough off + state->pen.strike = 0; + setpenattr_bool(state, VTERM_ATTR_STRIKE, 0); + break; + + case 30: case 31: case 32: case 33: + case 34: case 35: case 36: case 37: // Foreground colour palette + value = CSI_ARG(args[argi]) - 30; + state->fg_index = value; + if(state->pen.bold && state->bold_is_highbright) + value += 8; + set_pen_col_ansi(state, VTERM_ATTR_FOREGROUND, value); + break; + + case 38: // Foreground colour alternative palette + state->fg_index = -1; + if(argcount - argi < 1) + return; + argi += 1 + lookup_colour(state, CSI_ARG(args[argi+1]), args+argi+2, argcount-argi-2, &state->pen.fg, &state->fg_index); + setpenattr_col(state, VTERM_ATTR_FOREGROUND, state->pen.fg); + break; + + case 39: // Foreground colour default + state->fg_index = -1; + state->pen.fg = state->default_fg; + setpenattr_col(state, VTERM_ATTR_FOREGROUND, state->pen.fg); + break; + + case 40: case 41: case 42: case 43: + case 44: case 45: case 46: case 47: // Background colour palette + value = CSI_ARG(args[argi]) - 40; + state->bg_index = value; + set_pen_col_ansi(state, VTERM_ATTR_BACKGROUND, value); + break; + + case 48: // Background colour alternative palette + state->bg_index = -1; + if(argcount - argi < 1) + return; + argi += 1 + lookup_colour(state, CSI_ARG(args[argi+1]), args+argi+2, argcount-argi-2, &state->pen.bg, &state->bg_index); + setpenattr_col(state, VTERM_ATTR_BACKGROUND, state->pen.bg); + break; + + case 49: // Default background + state->bg_index = -1; + state->pen.bg = state->default_bg; + setpenattr_col(state, VTERM_ATTR_BACKGROUND, state->pen.bg); + break; + + case 90: case 91: case 92: case 93: + case 94: case 95: case 96: case 97: // Foreground colour high-intensity palette + value = CSI_ARG(args[argi]) - 90 + 8; + state->fg_index = value; + set_pen_col_ansi(state, VTERM_ATTR_FOREGROUND, value); + break; + + case 100: case 101: case 102: case 103: + case 104: case 105: case 106: case 107: // Background colour high-intensity palette + value = CSI_ARG(args[argi]) - 100 + 8; + state->bg_index = value; + set_pen_col_ansi(state, VTERM_ATTR_BACKGROUND, value); + break; + + default: + done = 0; + break; + } + + if(!done) + { + DEBUG_LOG1("libvterm: Unhandled CSI SGR %lu\n", arg); + } + + while(CSI_ARG_HAS_MORE(args[argi++])); + } +} + +INTERNAL int vterm_state_getpen(VTermState *state, long args[], int argcount UNUSED) +{ + int argi = 0; + + if(state->pen.bold) + args[argi++] = 1; + + if(state->pen.italic) + args[argi++] = 3; + + if(state->pen.underline == 1) + args[argi++] = 4; + + if(state->pen.blink) + args[argi++] = 5; + + if(state->pen.reverse) + args[argi++] = 7; + + if(state->pen.strike) + args[argi++] = 9; + + if(state->pen.font) + args[argi++] = 10 + state->pen.font; + + if(state->pen.underline == 2) + args[argi++] = 21; + + if(state->fg_index >= 0 && state->fg_index < 8) + args[argi++] = 30 + state->fg_index; + else if(state->fg_index >= 8 && state->fg_index < 16) + args[argi++] = 90 + state->fg_index - 8; + else if(state->fg_index >= 16 && state->fg_index < 256) { + args[argi++] = CSI_ARG_FLAG_MORE|38; + args[argi++] = CSI_ARG_FLAG_MORE|5; + args[argi++] = state->fg_index; + } + else if(state->fg_index == -1) { + // Send palette 2 if the actual FG colour is not default + if(state->pen.fg.red != state->default_fg.red || + state->pen.fg.green != state->default_fg.green || + state->pen.fg.blue != state->default_fg.blue ) { + args[argi++] = CSI_ARG_FLAG_MORE|38; + args[argi++] = CSI_ARG_FLAG_MORE|2; + args[argi++] = CSI_ARG_FLAG_MORE | state->pen.fg.red; + args[argi++] = CSI_ARG_FLAG_MORE | state->pen.fg.green; + args[argi++] = state->pen.fg.blue; + } + } + + if(state->bg_index >= 0 && state->bg_index < 8) + args[argi++] = 40 + state->bg_index; + else if(state->bg_index >= 8 && state->bg_index < 16) + args[argi++] = 100 + state->bg_index - 8; + else if(state->bg_index >= 16 && state->bg_index < 256) { + args[argi++] = CSI_ARG_FLAG_MORE|48; + args[argi++] = CSI_ARG_FLAG_MORE|5; + args[argi++] = state->bg_index; + } + else if(state->bg_index == -1) { + // Send palette 2 if the actual BG colour is not default + if(state->pen.bg.red != state->default_bg.red || + state->pen.bg.green != state->default_bg.green || + state->pen.bg.blue != state->default_bg.blue ) { + args[argi++] = CSI_ARG_FLAG_MORE|48; + args[argi++] = CSI_ARG_FLAG_MORE|2; + args[argi++] = CSI_ARG_FLAG_MORE | state->pen.bg.red; + args[argi++] = CSI_ARG_FLAG_MORE | state->pen.bg.green; + args[argi++] = state->pen.bg.blue; + } + } + + return argi; +} + +int vterm_state_get_penattr(const VTermState *state, VTermAttr attr, VTermValue *val) +{ + switch(attr) { + case VTERM_ATTR_BOLD: + val->boolean = state->pen.bold; + return 1; + + case VTERM_ATTR_UNDERLINE: + val->number = state->pen.underline; + return 1; + + case VTERM_ATTR_ITALIC: + val->boolean = state->pen.italic; + return 1; + + case VTERM_ATTR_BLINK: + val->boolean = state->pen.blink; + return 1; + + case VTERM_ATTR_REVERSE: + val->boolean = state->pen.reverse; + return 1; + + case VTERM_ATTR_STRIKE: + val->boolean = state->pen.strike; + return 1; + + case VTERM_ATTR_FONT: + val->number = state->pen.font; + return 1; + + case VTERM_ATTR_FOREGROUND: + val->color = state->pen.fg; + return 1; + + case VTERM_ATTR_BACKGROUND: + val->color = state->pen.bg; + return 1; + + case VTERM_N_ATTRS: + return 0; + } + + return 0; +} |