diff options
Diffstat (limited to 'src/interface-curses/interface.c')
| -rw-r--r-- | src/interface-curses/interface.c | 293 |
1 files changed, 98 insertions, 195 deletions
diff --git a/src/interface-curses/interface.c b/src/interface-curses/interface.c index b30e5dc..21e728f 100644 --- a/src/interface-curses/interface.c +++ b/src/interface-curses/interface.c @@ -140,6 +140,16 @@ static gint teco_xterm_version(void) G_GNUC_UNUSED; static gint teco_interface_blocking_getch(void); static inline gboolean teco_interface_check_key(gint key); +#define MAX_COLORS (MIN(COLORS, G_MAXSHORT)/2) +/** + * Maximum effective number of color pairs. + * Scinterm uses shorts for color pairs, so G_MAXSHORT is the maximum. + * Some Curses implementations (NetBSD, PDCurses) may support less, + * but set COLOR_PAIRS accordingly. + * Half of the range is reserved to Scinterm. + */ +#define MAX_PAIRS (MIN(COLOR_PAIRS, G_MAXSHORT)/2) + /** * Get bright variant of one of the 8 standard * curses colors. @@ -174,30 +184,22 @@ static inline gboolean teco_interface_check_key(gint key); static struct { /** + * Mapping of RGB codes (encoded into a pointer) + * to a curses color number. + */ + GHashTable *color_table; + /** * Mapping of foreground and background curses color tuples * (encoded into a pointer) to a color pair number. */ GHashTable *pair_table; - /** - * Mapping of the first 16 curses color codes (that may or may not - * correspond with the standard terminal color codes) to - * Scintilla-compatible RGB values (red is LSB) to initialize after - * Curses startup. - * Negative values mean no color redefinition (keep the original - * palette entry). + * Whether to map the 16 standard palettized colors + * in color_table. + * Should be disabled when using arbitrary RGB values, + * so every color is initialized to exact RGB values. */ - gint32 color_table[16]; - - /** - * Mapping of the first 16 curses color codes to their - * original values for restoring them on shutdown. - * Unfortunately, this may not be supported on all - * curses ports, so this array may be unused. - */ - struct { - gshort r, g, b; - } orig_color_table[16]; + gboolean use_palette; int stdin_orig, stdout_orig, stderr_orig; SCREEN *screen; @@ -272,7 +274,7 @@ teco_color_pair(attr_t *attr, gshort fg, gshort bg) gpointer value = g_hash_table_lookup(teco_interface.pair_table, key); if (G_LIKELY(value != NULL)) return GPOINTER_TO_UINT(value); - if (G_UNLIKELY(next_pair >= COLOR_PAIRS || next_pair > G_MAXSHORT)) + if (G_UNLIKELY(next_pair >= MAX_PAIRS)) return 0; init_pair(next_pair, fg, bg); g_hash_table_insert(teco_interface.pair_table, key, GUINT_TO_POINTER(next_pair)); @@ -300,38 +302,60 @@ teco_rgb2curses_triple(guint32 rgb, gshort *r, gshort *g, gshort *b) *b = ((rgb & 0xFF0000) >> 16)*1000/0xFF; } +static inline void +teco_interface_insert_color(guint32 rgb, gshort color) +{ + /* + * Color ids are stored one-offset, so that COLOR_BLACK + * can be discerned from a missing entry. + */ + g_hash_table_insert(teco_interface.color_table, + GUINT_TO_POINTER(rgb), GUINT_TO_POINTER(color)+1); +} + /** * Convert a Scintilla-compatible RGB color value * (0xBBGGRR) to a Curses color code (e.g. COLOR_BLACK). - * This does not work with arbitrary RGB values but - * only the 16 RGB color values defined by Scinterm - * corresponding to the 16 terminal colors. - * It is equivalent to Scinterm's internal `term_color` - * function. + * + * This will automatically initialize new curses colors + * when necessary. + * Unless the palette is disabled with + * teco_interface_disable_palette(), this will return + * the 16 "standard" colors for a predefined list of + * RGB values (just like defined by Scinterm). */ static gshort teco_rgb2curses(guint32 rgb) { - switch (rgb) { - case 0x000000: return COLOR_BLACK; - case 0x000080: return COLOR_RED; - case 0x008000: return COLOR_GREEN; - case 0x008080: return COLOR_YELLOW; - case 0x800000: return COLOR_BLUE; - case 0x800080: return COLOR_MAGENTA; - case 0x808000: return COLOR_CYAN; - case 0xC0C0C0: return COLOR_WHITE; - case 0x404040: return COLOR_LBLACK; - case 0x0000FF: return COLOR_LRED; - case 0x00FF00: return COLOR_LGREEN; - case 0x00FFFF: return COLOR_LYELLOW; - case 0xFF0000: return COLOR_LBLUE; - case 0xFF00FF: return COLOR_LMAGENTA; - case 0xFFFF00: return COLOR_LCYAN; - case 0xFFFFFF: return COLOR_LWHITE; - } + static guint colors = 0; + + if (!has_colors()) + return COLOR_WHITE; + + gpointer value = g_hash_table_lookup(teco_interface.color_table, + GUINT_TO_POINTER(rgb)); + if (G_LIKELY(value != NULL)) + return GPOINTER_TO_UINT(value)-1; + + /* + * Even when initializing new colors, we will __try__ not to + * touch the 16 palettized colors. + * First of all, we might still need them and secondly, + * this ensures we don't have to reset them on exit + * (which is not always possible anyway). + * There can still be 16 color terminals with + * can_change_color() == TRUE, though. + */ + guint next_color = colors + (COLORS > 16 ? 16 : 0); - return COLOR_WHITE; + if (G_UNLIKELY(next_color >= MAX_COLORS) || !can_change_color()) + return COLOR_WHITE; + gshort r, g, b; + teco_rgb2curses_triple(rgb, &r, &g, &b); + init_color(next_color, r, g, b); + teco_interface_insert_color(rgb, next_color); + colors++; + return next_color; } static gint @@ -422,9 +446,6 @@ teco_view_free(teco_view_t *ctx) scintilla_delete(ctx); } -static void teco_interface_init_color_safe(guint color, guint32 rgb); -static void teco_interface_restore_colors(void); - static void teco_interface_init_screen(void); static gboolean teco_interface_init_interactive(GError **error); static void teco_interface_restore_batch(void); @@ -439,10 +460,7 @@ static void teco_interface_draw_info(void); void teco_interface_init(gint argc, gchar **argv) { - for (guint i = 0; i < G_N_ELEMENTS(teco_interface.color_table); i++) - teco_interface.color_table[i] = -1; - for (guint i = 0; i < G_N_ELEMENTS(teco_interface.orig_color_table); i++) - teco_interface.orig_color_table[i].r = -1; + teco_interface.use_palette = TRUE; teco_interface.stdin_orig = teco_interface.stdout_orig = teco_interface.stderr_orig = -1; @@ -484,133 +502,11 @@ teco_interface_get_options(void) return NULL; } -static void -teco_interface_init_color_safe(guint color, guint32 rgb) -{ -#if defined(__PDCURSES__) && !defined(PDCURSES_GUI) - if (teco_interface.orig_color_table[color].r < 0) { - color_content((short)color, - &teco_interface.orig_color_table[color].r, - &teco_interface.orig_color_table[color].g, - &teco_interface.orig_color_table[color].b); - } -#endif - - gshort r, g, b; - teco_rgb2curses_triple(rgb, &r, &g, &b); - init_color((short)color, r, g, b); -} - -#if defined(__PDCURSES__) && !defined(PDCURSES_GUI) - -/* - * On PDCurses/WinCon, color_content() will actually return - * the real console color palette - or at least the default - * palette when the console started. - */ -static void -teco_interface_restore_colors(void) -{ - if (!can_change_color()) - return; - - for (guint i = 0; i < G_N_ELEMENTS(teco_interface.orig_color_table); i++) { - if (teco_interface.orig_color_table[i].r < 0) - continue; - - init_color((short)i, - teco_interface.orig_color_table[i].r, - teco_interface.orig_color_table[i].g, - teco_interface.orig_color_table[i].b); - } -} - -#elif defined(CURSES_TTY) - -/* - * FIXME: On UNIX/ncurses teco_interface_init_color_safe() __may__ - * change the terminal's palette permanently and there does not - * appear to be any portable way of restoring the original one. - * Curses has color_content(), but there is actually no terminal - * that allows querying the current palette and so color_content() - * will return bogus "default" values and only for the first 8 colors. - * It would do more damage to restore the palette returned by - * color_content() than it helps. - * xterm has the escape sequence "\e]104\a" which restores - * the palette from Xdefaults but not all terminal emulators - * claiming to be "xterm" via $TERM support this escape sequence. - * lxterminal for instance will print gibberish instead. - * So we try to look whether $XTERM_VERSION is set. - * There are hardly any other terminal emulators that support palette - * resets. - * The only emulator I'm aware of which can be identified reliably - * by $TERM supporting a palette reset is the Linux console - * (see console_codes(4)). The escape sequence "\e]R" is already - * part of its terminfo description (orig_colors capability) - * which is apparently sent by endwin(), so the palette is - * already properly restored on endwin(). - * Welcome in Curses hell. - */ -static void -teco_interface_restore_colors(void) -{ - if (teco_xterm_version() < 0) - return; - - /* - * Looks like a real XTerm - */ - fputs("\e]104\a", teco_interface.screen_tty); - fflush(teco_interface.screen_tty); -} - -#else /* (!__PDCURSES__ || PDCURSES_GUI) && !CURSES_TTY */ - -static void -teco_interface_restore_colors(void) -{ - /* - * No way to restore the palette, or it's - * unnecessary (e.g. XCurses) - */ -} - -#endif - void -teco_interface_init_color(guint color, guint32 rgb) +teco_interface_disable_palette(void) { - if (color >= G_N_ELEMENTS(teco_interface.color_table)) - return; - -#if defined(__PDCURSES__) && !defined(PDC_RGB) - /* - * PDCurses will usually number color codes differently - * (least significant bit is the blue component) while - * SciTECO macros will assume a standard terminal color - * code numbering with red as the LSB. - * Therefore we have to swap the bit order of the least - * significant 3 bits here. - */ - color = (color & ~0x5) | - ((color & 0x1) << 2) | ((color & 0x4) >> 2); -#endif - - if (teco_interface.input_pad) { - /* interactive mode */ - if (!can_change_color()) - return; - - teco_interface_init_color_safe(color, rgb); - } else { - /* - * batch mode: store colors, - * they can only be initialized after start_color() - * which is called by Scinterm when interactive - * mode is initialized - */ - teco_interface.color_table[color] = (gint32)rgb; - } + teco_interface.use_palette = FALSE; + scintilla_disable_color_palette(); } #ifdef CURSES_TTY @@ -752,14 +648,33 @@ teco_interface_init_interactive(GError **error) teco_interface_init_screen(); + teco_interface.color_table = g_hash_table_new(g_direct_hash, g_direct_equal); teco_interface.pair_table = g_hash_table_new(g_direct_hash, g_direct_equal); start_color(); - /* - * Scinterm uses shorts for color pairs, so G_MAXSHORT is the maximum. - * Some Curses implementations (NetBSD, PDCurses) may support less, - * but set COLOR_PAIRS accordingly. - */ - scintilla_set_color_offsets(0, MIN(COLOR_PAIRS, G_MAXSHORT)/2); + scintilla_set_color_offsets(MAX_COLORS, MAX_PAIRS); + + if (teco_interface.use_palette && has_colors()) { + teco_interface_insert_color(0x000000, COLOR_BLACK); + teco_interface_insert_color(0x000080, COLOR_RED); + teco_interface_insert_color(0x008000, COLOR_GREEN); + teco_interface_insert_color(0x008080, COLOR_YELLOW); + teco_interface_insert_color(0x800000, COLOR_BLUE); + teco_interface_insert_color(0x800080, COLOR_MAGENTA); + teco_interface_insert_color(0x808000, COLOR_CYAN); + teco_interface_insert_color(0xC0C0C0, COLOR_WHITE); + /* + * On 8-color terminals, we still support the + * higher (light) colors, but map them to the lower codes as well. + */ + teco_interface_insert_color(0x404040, COLOR_LBLACK); + teco_interface_insert_color(0x0000FF, COLOR_LRED); + teco_interface_insert_color(0x00FF00, COLOR_LGREEN); + teco_interface_insert_color(0x00FFFF, COLOR_LYELLOW); + teco_interface_insert_color(0xFF0000, COLOR_LBLUE); + teco_interface_insert_color(0xFF00FF, COLOR_LMAGENTA); + teco_interface_insert_color(0xFFFF00, COLOR_LCYAN); + teco_interface_insert_color(0xFFFFFF, COLOR_LWHITE); + } /* * On UNIX terminals, the escape key is usually @@ -841,19 +756,6 @@ teco_interface_init_interactive(GError **error) teco_interface_show_view(teco_interface_current_view); /* - * Only now it's safe to redefine the 16 default colors. - */ - if (can_change_color()) { - for (guint i = 0; i < G_N_ELEMENTS(teco_interface.color_table); i++) { - /* - * init_color() may still fail if COLORS < 16 - */ - if (teco_interface.color_table[i] >= 0) - teco_interface_init_color_safe(i, (guint32)teco_interface.color_table[i]); - } - } - - /* * Only now (in interactive mode), it's safe to initialize * the clipboard Q-Registers on ncurses with a compatible terminal * emulator since clipboard operations will no longer interfer @@ -885,7 +787,6 @@ teco_interface_restore_batch(void) * (i.e. return to batch mode) */ endwin(); - teco_interface_restore_colors(); /* * Restore stdin, stdout and stderr, so output goes to @@ -2409,6 +2310,8 @@ teco_interface_cleanup(void) if (teco_interface.stdout_orig >= 0) close(teco_interface.stdout_orig); + if (teco_interface.color_table) + g_hash_table_destroy(teco_interface.color_table); if (teco_interface.pair_table) g_hash_table_destroy(teco_interface.pair_table); |